NZ793726A - Restimulation of cryopreserved tumor infiltrating lymphocytes - Google Patents

Abstract

The present disclosure provides methods for re-stimulating TIL populations that lead to improved phenotype and increased metabolic health of the TILs and provides methods of assaying for TIL populations to determine suitability for more efficacious infusion after re- stimulation.

Description

The t disclosure provides methods for re-stimulating TIL populations that lead to improved phenotype and increased metabolic health of the TILs and provides methods of assaying for TIL populations to determine suitability for more efficacious infusion after re- stimulation.

NZ 793726 RESTIMULATION OF CRYOPRESERVED TUMOR INFILTRATING LYMPHOCYTES CROSS REFERENCE TO RELATED ATIONS This application claims priority to U. S. Provisional Patent Application Nos. 62/413,283 and 62/413,387, filed October 26, 2016, entitled “Expansion of Tumor- Infiltrating Lymphocytes and Methods of Using the Same,” and US. Provisional Patent Application No. 62/415,452, filed October 31, 2016, entitled “RESTIMULATION OF CRYOPRESERVED TUMOR INFILTRATING LYMPHOCYTES,” which are hereby incorporated by reference in their entirety.

OUND OF THE INVENTION Treatment of bulky, refractory cancers using adoptive transfer of tumor infiltrating cytes (TILs) represents a powerful approach to therapy for ts with poor prognoses. Gattinoni, er al., Nat. Rev. Immunol. 2006, 6, 383-393. A large number of TILs are required for successful immunotherapy, and a robust and reliable process is needed for commercialization. This has been a challenge to achieve because of technical, logistical, and regulatory issues with cell expansion. ased TIL expansion followed by a “rapid expansion process” (REP) has become a preferred method for TIL expansion because of its Speed and efficiency. Dudley, er al., Science 2002, 298, 850-54, , et 61]., J. Clin.

Oncol. 2005, 23, 2346-57, Dudley, et 51]., J. Clin. Oncol. 2008, 26, 5233-39, Riddell, er al., e 1992, 257, 238-41; , et al., J. Immunolher. 2003, 26, 332-42. REP can result in a 1,000-fold expansion of TILs over a 14-day period, although it requires a large excess (e. g., ld) of irradiated allogeneic peripheral blood mononuclear cells (PBMCs), often from multiple donors, as feeder cells, as well as anti-CD3 antibody (OKT3) and high doses of IL-2. Dudley, et 61]., J. Immunother. 2003, 26, 332-42.

TILs that have undergone an REP procedure have produced successful adoptive cell therapy following host immunosuppression in patients with melanoma. Current infusion acceptance parameters rely on readouts of the composition of TILs (e.g., CD28, CD8, or CD4 positivity) and on fold ion and viability of the REP t.

However, current REP protocols, as well as current TIL expansion ols generally, give little insight into the health of the TIL that will be infused into the patient. T cells undergo a profound metabolic shift during the course of their maturation from naive to WO 81473 effector T cells (see Chang, el al, Nat. Immunol. 2016, I 7, 364, hereby expressly incorporated in its entirety, and in particular for the discussion and markers of anaerobic and aerobic lism). For example, naive T cells rely on mitochondrial respiration to produce ATP, while mature, healthy effector T cells such as TIL are highly glycolytic, relying on aerobic glycolysis to provide the rgetics substrates they require for proliferation, migration, activation, and anti-tumor efficacy.

In addition, these expanded cell populations can be cryopreserved, g to ease of use, long-term storage for multiple reinfusions into patients with ent disease, and other erations. However, t on acceptance parameters rely on readouts of the composition of TILs and on fold-expansion and ity of the expanded TIL based product, These es give little insight into the health of the TIL that will be infused into the patient, and little is known about the effects of cryopreservation on TIL populations.

Accordingly, the present invention is directed to methods for expanding and re- stimulating TIL populations that lead to improved phenotype and increased metabolic health of the TILs and towards methods of ng for TIL populations to determine suitability for more efficacious infusion after re-stimulation.

BRIEF SUMMARY OF THE INVENTION The present invention es methods for expanding TILs in larger, sometimes therapeutic, populations in combination with optional cryopreservation.

According to the present disclosure, a method for expanding tumor infiltrating lymphocytes (TILs) into a therapeutic population of TILs comprising the following steps is provided: (i) obtaining a first population of TILs from a tumor resected from a patient; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium sing IL—2 to e a second population of TILs, and (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TlLs which comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs.

In some embodiments, the method r comprises: (iv) performing an additional second ion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic tion of TILs than obtained in step (iii), wherein the larger therapeutic population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells ve to the third population of TILs.

In some embodiments, after step (iii), the cells are removed from the cell culture and cryopreserved in a storage medium prior to performing step (iv).

In some embodiments, the cells are thawed prior to performing step (iv).

In some embodiments, step (iv) is repeated one to four times in order to obtain sufficient TlLs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days. In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days. In some embodiments, steps (i) through (iii) or (iv) are med within a period of about 42 days to about 45 days. In some ments, steps (i) through (iii) or (iv) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (iv) express CD4, CD8, and TCR 0t [3 at levels similar to freshly harvested cells.

In some embodiments, the n presenting cells are peripheral blood mononuclear cells (PBMCs). In some embodiments, the PBMCs are added to the cell e on any of days 9 through 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the therapeutic population of TILs in step (iv) exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, sed CD57 expression, and decreased CD56 sion, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the method r comprises the step of transducing the first population of TILs with an expression vector comprising a c acid encoding a high- affinity T cell receptor.

In some ments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid ng a chimeric antigen or (CAR) sing a single chain variable fragment antibody fused with at least one endodomain of a T-cell signaling molecule.

In some embodiments, the therapeutic population of TILs are infused into a patient.

In some embodiments, step (iii) further comprises a step of removing the cells from the cell e medium.

In some ments, step (iii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3X1010 to about 010.

The present disclosure also provides a population of expanded TILs made according to the method of claim 1.

The present disclosure also es a population of expanded TILs made according to the method of claim 1, wherein the expanded TILs have at least a two—fold increase in basal glycolysis as compared to thawed cryopreserved TILs.

The t disclosure also provides methods for assessing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the basal glycolysis of the cells.

The present disclosure also provides methods for assessing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the basal respiration of the cells.

The present disclosure also provides s for assessing the metabolic activity of a TIL cell population made according to the methods described herein, comprising measuring the spare respiratory capacity (SRC) of the cells.

The present disclosure also provides methods for assessing the metabolic activity of a TIL cell tion made according to the methods bed herein, comprising measuring the glycolytic reserve of the cells.

The present disclosure also provides a method for expanding tumor ating lymphocytes (TILs) into a therapeutic population of TILs comprising: (i) performing a first expansion by culturing a first population of TILs from a tumor resected from a patient in a cell culture medium comprising IL-2 to obtain a second population of TILs, and (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs) to obtain a third population of TILs, wherein the third population of TILs is at least d or lOO-fold r in number than the second population of TILs, and n the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased ulation of effector T cells and/or central memory T cells relative to the second population of TILs.

In some embodiments, the method further comprises: (iii) performing an additional second expansion of the third population of TILs by supplementing the cell culture medium of the third population of TILs with additional IL-2, onal OKT-3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (ii), wherein the larger therapeutic population of TILs exhibits an increased subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs.

In some embodiments, the cells from the cell culture medium in step (ii) are removed and eserved in a storage medium prior to step (iii).

In some embodiments, the cells are thawed prior to step (iii).

In some embodiments, step (ii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically ive dosage is from about 2.3 >< 1010 to about l3.7><1010.

In some embodiments, the APCs are peripheral blood mononuclear cells (PBMCs).

In some embodiments, the effector T cells and/or central memory T cells t one or more characteristics selected from the group ting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

The present disclosure also provides a method for treating a subject with cancer comprising administering expanded tumor infiltrating lymphocytes (TILs) comprising: (i) obtaining a first population of TlLs from a tumor resected from a patient, (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium sing IL—2 to produce a second population of TILs, (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and n the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased ulation of effector T cells and/or central memory T cells relative to the second population of TILs, and (iv) administering a therapeutically ive dosage of the third population of TILs to the patient.

In some ments, the method further comprises prior to step (iv) a step of performing an additional second expansion by supplementing the cell e medium of the third tion of TILs with additional IL—2, additional OKT—3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (iii), wherein the larger therapeutic population of TILs ses an sed subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs.

In some ments, after step (ii) the cells are removed from the cell culture medium and cryopreserved in a storage medium prior to the additional second expansion according to the methods described herein.

In some ments, the cells are thawed prior to the additional second expansion of according to the methods described herein.

In some embodiments, step (iii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3 X 1010 to about 010.

In some embodiments, the APCs are peripheral blood mononuclear cells (PBMCs).

In some embodiments, the effector T cells and/or l memory T cells exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and sed CD56 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the cancer is selected from the group consisting of melanoma, cervical cancer, head and neck cancer, astoma, ovaiian cancer, sarcoma, pancreatic cancer, bladder cancer, breast , triple negative breast cancer, and non-small cell lung carcinoma.

The present disclosure also provides a method for treating a subject with cancer comprising administering expanded tumor infiltrating lymphocytes (TILs) comprising: (i) ming a first expansion by culturing a first population of TILs from a tumor resected from a patient in a cell culture medium comprising IL-2 to obtain a second population of TILs, (ii) performing a second ion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCS) to obtain a third population of TILs, wherein the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, n the third population of TILs is a eutic tion of TILs which comprises an increased subpopulation of or T cells and/or central memory T cells relative to the second tion of TILs; and (iii) administering a therapeutically effective dosage of the therapeutic population of TILs to the patient.

In some embodiments, the method further comprises prior to step (iii) a step of performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with onal IL-2, additional OKT-3, and additional APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger eutic population of TILs than obtained in step (ii), wherein the larger therapeutic population of TILs comprises an increased subpopulation of effector T cells and/or l memory T cells relative to the third population of TILs.

In some embodiments, the cells from the cell culture medium in step (ii) are removed and cryopreserved in a storage medium prior to the additional second expansion as described herein.

In some embodiments, the cells are thawed prior to the additional second expansion as described herein.

In some embodiments, step (ii) is repeated one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3 X 1010 to about 13.7X1010.

In some embodiments, the APCS are peripheral blood mononuclear cells (PBMCS).

In some embodiments, the effector T cells and/or central memory T cells exhibit one or more characteristics ed from the group consisting of expression of CD27, expression of CD28, longer res, increased CD57 expression, and decreased CD56 WO 81473 expression, relative to effector T cells and/or central memory T cells in the third population of cells.

In some ments, the or T cells and/or central memory T cells exhibit increased CD57 expression and sed CD56 expression.

In some embodiments, the cancer is selected from the group consisting of melanoma, cervical cancer, head and neck cancer, glioblastoma, ovarian cancer, sarcoma, pancreatic cancer, bladder cancer, breast cancer, triple negative breast cancer, and non-small cell lung oma.

The present ion also provides assay methods for determining TIL viability.

The t disclosure provides s for assaying TILs for viability by expanding tumor infiltrating lymphocytes (TILs) into a larger population of TILs comprising: (i) obtaining a first population of TILs which has been previously expanded; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs; and (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL—2, OKT—3, and antigen presenting cells (APCs), to produce a third population of TILs, n the third population of TILs is at least 50-fold or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs, and wherein the third population is further assayed for viability.

In some embodiments, the method further comprises: (iv) performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and additional APCs, wherein the additional second expansion is med for at least 14 days to obtain a larger population of TILs than obtained in step (iii), wherein the larger population of TILs comprises an increased ulation of effector T cells and/or central memory T cells relative to the third population of TILs, and wherein the third population is further assayed for viability.

In some embodiments, prior to step (i), the cells are cryopreserved.

In some embodiments, the cells are thawed prior to performing step (i).

In some ments, step (iv) is repeated one to four times in order to obtain sufficient TILs for analysis.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 45 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (iv) express CD4, CD8, and TCR 0t B at levels similar to freshly harvested cells.

In some embodiments, the antigen presenting cells are peripheral blood mononuclear cells ).

In some embodiments, the PBMCs are added to the cell culture on any of days 9 h 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the larger population of TILs in step (iv) exhibit one or more characteristics ed from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 sion.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the method further comprises the step of transducing the first population of TILs with an sion vector comprising a nucleic acid encoding a highaffinity T cell receptor.

In some ments, the step of transducing occurs before step (i).

In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising a single chain variable fragment dy fused with at least one main of a T-cell signaling molecule.

In some embodiments, the step of ucing occurs before step (i).

In some embodiments, the TILs are d for viability.

In some embodiments, the TILs are assayed for viability after cryopreservation.

In some embodiments, the TILs are assayed for viability after cryopreservation and after step (iv).

According to the present disclosure, a method for assaying TILs for viability and/or further use in administration to a subject. In some embodiments, the method for assay tumor infiltratitng lymphocytes (TILs) comprises: (i) obtaining a first population of TILs; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL—2 to produce a second tion of TILs, and (iii) ming a second expansion by menting the cell e medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold greater in number than the second population of TILs, (iv) harvesting, washing, and cryopreserving the third population of TILs; (v) storing the cryopreserved TILs at a cryogenic temperature, (vi) thawing the third population of TILs to provide a thawed third population of TILs, and (vii) performing an additional second expansion of a portion of the thawed third population of TILs by menting the cell culture medium of the third population with IL-2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the third expansion is med to obtain a fourth population of TILs, wherein the number of TILs in the fourth population of TILs is compared to the number of TILs in the third population of TILs to obtain a ratio; (viii) determining based on the ratio in step (vii) whether the thawed population of TILs is suitable for stration to a patient; (ix) administering a therapeutically effective dosage of the thawed third tion of TILs to the patient when the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is determined to be greater than 5:1 in step .

In some embodiments, the reREP period is performed until the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is greater than 50:1.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3X1010 to about l3.7><1010.

In some embodiments, steps (i) through (vii) are performed within a period of about 40 days to about 50 days. In some embodiments, steps (i) through (vii) are performed within a period of about 42 days to about 48 days. In some embodiments, steps (i) through (vii) are performed within a period of about 42 days to about 45 days. In some embodiments, steps (i) through (vii) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (vii) express CD4, CD8, and TCR 0t B at levels similar to y harvested cells. In some embodiments the cells are TILs.

In some embodiments, the antigen presenting cells are peripheral blood mononuclear cells (PBMCs). In some embodiments, the PBMCs are added to the cell culture on any of days 9 through 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the larger population of TILs in steps (iii) or (vii) exhibit one or more characteristics selected from the group ting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some ments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a high-affinity T cell receptor.

In some ments, the step of transducing occurs before step (i).

In some embodiments, the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a ic antigen receptor (CAR) comprising a single chain variable fragment antibody fused with at least one main of a T-cell signaling molecule.

In some embodiments, the step of ucing occurs before step (i).

In some embodiments, the TILs are assayed for viability after step (vii).

The present disclosure also provides further methods for assaying TILs. In some embodiments, the disclosure provides a method for assaying TILs comprising: (i) obtaining a portion of a first population of cryopreserved TILs, (ii) thawing the portion of the first population of cryopreserved TILs, (iii) performing a first ion by culturing the portion of the first population of TILs in a cell culture medium comprising lL-2, OKT-3, and n presenting cells (APCs) for a reREP period of at least 3 days, to e a second population of TILs, wherein the n from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5: 1, (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient, (v) determining the first population of TILs is suitable for use in therapeutic administration when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first population of TILs is determined to be greater than :1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 50:1.

In some embodiments, the method further comprises performing expansion of the entire first population of cryopreserved TILs from step (i) according to the methods as described in any of the embodiments provided herein.

In some embodiments, the method further comprises administering the entire first population of cryopreserved TILs from step (i) to the patient.

The present disclosure also provides further methods for assaying TILs. In some embodiments, the disclosure provides a method for ng TILs comprising: (i) obtaining a portion of a first population of eserved TILs; (ii) thawing the portion of the first population of cryopreserved TILs; (iii) performing a first expansion by culturing the portion of the first population of TILs in a cell culture medium comprising 1L-2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, n the n from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, n the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5:1, (iv) determining based on the ratio in step (iii) r the first population of TILs is suitable for use in therapeutic administration to a patient; and (v) therapeutically administering the der of the first population of TILs to the patient when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first population of TILs is determined to be greater than 5:1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 50:1.

In some embodiments, the method further comprises performing expansion of the entire first population of cryopreserved TILs from step (i) according to the methods of any of the preceding claims.

In some embodiments, the method further ses administering the entire first population of cryopreserved TILs from step (i) to the patient.

In some embodiments, the method further comprised the step of assessing the metabolic health of the second population of TILs.

In some ments, the method further comprises the step of assessing the phenotype of the second population of TILs.

In some embodiments, the antigen presenting cells are allogeneic peripherial blood mononuclear cells.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1: Shows the results from Example 1. As the Table shows, following the antigen restimulation rapid expansion protocol (“reREP”), the TILs exhibit a marked enhancement in their glycolytic respiration. SRC = spare respiratory capacity.

Figure 2: Composition of fresh vs. thawed TIL. TIL were stained for TCROLB and CD56 to define T-cell and NK populations. The data shown are averages of 6 individual TILs.

Figure 3: Memory phenotype is defined by CD45RA and CCR7 Expression. CD4 and CD8 TIL are mainly or Memory (EM) This remains the same in the thawed TIL.

Each point is one sample ed. No significant difference is found in a Wilcoxon matched-pairs signed rank test.

] Figure 4: Pearson’s correlation of CD4, CD8, CD4+CD28+, and CD8+CD28+ frequency between fresh and thawed TIL. Cells were stained with above markers. Each dot represents one individual with the fresh value on the x axis and the thawed value on the y axis. The fit line was drawn using linear regression analysis.

Figure 5: Comparable Activation Markers on Fresh and Thawed TILs. No significant difference in activation status of fresh vs. thawed TIL was found using a on Matched-Pairs Rank Test. Each point ents one sample ed and is shown as mean +/- SEM.

Figure 6: nance of LAG-3 Staining Following Cryopreservation and Thaw.

A: LAG-3 staining of CD8 TIL. B: % frequency of regulatory molecules of the CD4 and CD8 populations on fresh and thawed TIL. CD8+TIM-3+ and CD8+LAG—3+ thawed TIL have a lower % than fresh TIL. Mann-Whitney statistical test.

Figure 7: Remarkably stable tumor-infiltrating lymphocytes (TIL) for infusion ype following cryopreservation.

Figure 8: Scatter plot showing phenotypic terization of reREP TILs. Q1 shows 19.0% CD45RA+/CCR7'; Q2 shows 0.066% CD45RA+/CCR7+; Q4 shows 80.6% CD45RA'/CCR7', and Q3 shows 0.36% CD45RA'/CCR7+, Figure 9: Diagram and data showing the phenotypic characterization of reREP TILs, during the first and second ion phases 0.08% CD45RA+/CCR7', 0.03% CD45RA+/CCR7+, 73.97% CD45RA'/CCR7'; and 25.91% CD45RA'/CCR7+ at Day 14, after the first expansion but prior to the second expansion. Proliferation of CM or EM TIL in the repeat ReREP. Central Memory (CM) TIL and Effector Memory (EM) TIL were tested for the proliferation capacity using repeat ReREP. Briefly, 1.3 x 106 Post REP TIL were co- culture with 1.3 x 107 PBMC feeders (CFSE labelled), OKT3 (30 ng/nl) and rhIL-2 (3000 IU/ml), culture was ted for 14 days. On Day 14, central memory TIL and effector memory TIL were gated for L/D Aqua-/CF SE-/TCROt/B +/CD45RA-/CCR7+ and L/D Aqua- /CF SE—/TCR0L/B +/CD45RA—/CCR7— population respectively and flow cytometry sorted.

Purity of the cell population was 97%. 1 x 104 flow sorted CM or EM or unsorted TIL were then cultured 1 x 106 PBMC feeders, OKT3 (30 ng/nl) and IL-2 (3 000 IU/ml) in triplicates for 7 days. Cell were counted and recorded. Central memory TIL were more proliferative when compared to Effector memory TIL. We are ing this experiment with more post REP TIL lines.

Figure 10A and 10B: Phenotypic characterization of TILS during ReREP. Cells were gated on Aqua-/TCR a/B+/CD4+ or CD8+ to show l Memory TILs (CD45RA' CCR7+) or Effector Memory TILs A'CCR7') memory phenotype. Student “t” was used to ate statistical significance. >“p < 0.05, ns non-significant.

Figure 11: ary schematic of the TIL preparation process, sometimes referred to herein as the 1C process.

Figure 12: Successful expansion of TILs from lanoma tumors. Data shows the distribution of TIL (CD4+/CD8+) in non-melanoma tumors.

Figure 13: Non-melanoma TILs expressed CD27 and CD3 8, consistent with young TILs.

Figure 14: Activated TILs skew towards effector memory population.

Figure 15: Fresh versus reREP TIL phenotypes.

DETAILED DESCRIPTION OF THE INVENTION 1. Introduction ] Adoptive cell therapy utilizing TILs ed ex vivo by the Rapid Expansion Protocol (REP) has ed successful adoptive cell therapy following host immunosuppression in patients with melanoma. Current infusion acceptance parameters rely on readouts of the composition of TILs (e.g., CD28, CD8, or CD4 positivity) and on the numerical folds of expansion and viability of the REP product.

Current REP protocols give little insight into the health of the TIL that will be infused into the patient. T cells undergo a profound lic shift during the course of their maturation from naive to effector T cells (see Chang, et al., Nat. Immunol. 2016, 17, 364, hereby expressly incorporated in its entirety, and in particular for the discussion and markers of anaerobic and aerobic metabolism). For example, naive T cells rely on mitochondrial respiration to produce ATP, while mature, healthy or T cells such as TIL are highly ytic, relying on aerobic glycolysis to provide the bioenergetics substrates they require for eration, migration, activation, and anti-tumor efficacy.

] Previous papers report that limiting glycolysis and promoting mitochondrial metabolism in TlLs prior to transfer is desirable as cells that are relying heavily on glycolysis will suffer nutrient ation upon adoptive transfer which results in a majority of the transferred cells dying. Thus, the art s that promoting mitochondrial metabolism might promote in vivo longevity and in fact suggests using inhibitors of glycolysis before ion of the immune response. See Chang et a1. (Chang, et al., Nat. Immunol. 2016, 17(3 64), 574- The present invention is directed in preferred aspects to novel methods of augmenting REPS with an additional restimulation protocol, sometimes referred to herein as a “restimulation Rapid Expansion Protocol” or “reRE ”, which leads surprisingly to expanded memory T cell subsets, including the central memory (CD45RA'CCR7+) or effector memory (CD45RA'CCR7') phenotypes, and/or to marked enhancement in the glycolytic respiration as compared to freshly ted TILs or thawed cryopreserved TlLs for the restimulated TILs (sometimes ed to herein as “reTILs”). That is, by using a reREP procedure (126., a procedure comprising a first expansion and a second expansion) on cryopreserved TILs, patients can receive highly metabolically active, healthy TILs, leading to more favorable outcomes.

The present invention is further directed in some embodiments to methods for evaluating and quantifying this se in metabolic health. Thus, the present invention provides methods of assaying the relative health of a TIL population using one or more general evaluations of metabolism, including, but not limited to, rates and amounts of glycolysis, ive phosphorylation, spare respiratory capacity (SRC) and glycolytic reserve.

Furthermore, the present invention is further directed in some ments to methods for evaluating and quantifying this increase in metabolic health. Thus, the present invention provides methods of assaying the relative health of a TIL population using one or more general evaluations of metabolism, including, but not d to, rates and amounts of glycolysis, oxidative phosphorylation, spare respiratory capacity (SRC), and glycolytic reserve.

In addition, optional onal evaluations include, but are not limited to, ATP production, mitochondrial mass and glucose .

] In some cases, the reREP cell population with increased metabolic health are infused into a patient as is lly known in the art.

II. Definitions By “tumor infiltrating lymphocytes” or “TILs” herein is meant a population of cells originally obtained as white blood cells that have left the bloodstream of a subject and migrated into a tumor. TILs include, but are not limited to, CD8+ cytotoxic T cells (lymphocytes), Th1 and Thl7 CD4+ T cells, natural killer cells, dendritic cells and M1 macrophages. TILs e both primary and secondary TILs. “Primary TILs” are those that are obtained from patient tissue samples as ed herein (sometimes referred to as “freshly ted”), and “secondary TILs” are any TIL cell populations that have been expanded or proliferated as discussed , including, but not limited to bulk TILs, expanded TILs (“REP TILs”) as well as “reREP TILs” as discussed herein.

TILs can generally be defined either biochemically, using cell surface markers, or functionally, by their ability to infiltrate tumors and effect treatment. TILs can be generally categorized by expressing one or more of the following biomarkers: CD4, CD8, TCR dB, CD27, CD28, CD56, CCR7, CD45Ra, CD95, PD—l, and CD25. Additionally, and alternatively, TILs can be functionally defined by their ability to infiltrate solid tumors upon reintroduction into a t. TILS may further be characterized by potency — for example, TILS may be considered potent if, for example, interferon (IFN) release is greater than about 50 pg/mL, greater than about 100 pg/mL, greater than about 150 pg/mL, or r than about 200 pg/mL. Interferon can include interferon gamma (IFNy).

By “cryopreserved TILs” herein is meant that TILs, either primary, bulk, or expanded (REP TILs), are treated and stored in the range of about -lSO°C to -6OOC. General s for cryopreservation are also described elsewhere , including in the Examples.

For clarity, “cryopreserved TILs” are guishable from frozen tissue samples which may be used as a source of primary TILs.

By “thawed cryopreserved TILs” herein is meant a population of TILs that was usly eserved and then treated to return to room temperature or higher, including but not d to cell culture temperatures or temperatures wherein TILs may be administered to a patient.

By “population of cells” (including TILs) herein is meant a number of cells that share common . In general, populations generally range from 1 X 106 to 1 X 1010 in number, with different TIL populations comprising different numbers. For e, initial growth of primary TILs in the presence of IL-2 results in a population of bulk TILS of roughly 1 X 108 cells. REP expansion is generally done to provide populations of 1.5 X 109 to 1.5 X 1010 cells for infusion.

In general, TILs are initially obtained from a patient tumor sample (“primary TILs”) and then expanded into a larger population for further manipulation as described herein, ally cryopreserved, restimulated as outlined herein and ally evaluated for phenotype and metabolic parameters as an indication of TIL health.

In general, the harvested cell suspension is called a “primary cell population” or a “freshly harvested” cell population.

In general, as discussed herein, the TILs are initially prepared by obtaining a primary population of TILs from a tumor resected from a patient as discussed herein (the “primary cell population” or “first cell tion”). This is followed with an initial bulk expansion utilizing a culturing of the cells with IL-2, forming a second population of cells (sometimes referred to herein as the “bulk TIL population” or “second population”).

The term “cytotoxic lymphocyte” includes xic T (CTL) cells (including CD8+ cytotoxic T lymphocytes and CD4+ T-helper lymphocytes), natural killer T (NKT) cells and natural killer (NK) cells. Cytotoxic lymphocytes can include, for e, peripheral blood- derived OL/BTCR-positive or a/BTCR-positive T cells activated by tumor associated antigens and/or uced With tumor specific chimeric antigen ors or T-cell receptors, and tumor-infiltrating lymphocytes (TILs).

The term “central memory T cell” refers to a subset of T cells that in the human are CD45RO+ and constitutively s CCR7 (CCR7 hi) and CD62L (CD62 hi). The surface phenotype of central memory T cells also includes TCR, CD3, CD127 (IL-7R), and IL-lSR. ription factors for central memory T cells include BCL-6, , MBD2, and BMII.

Central memory T cells primarily secret IL-2 and CD4OL as or molecules after TCR triggering. Central memory T cells are predominant in the CD4 compartment in blood, and in the human are proportionally enriched in lymph nodes and tonsils.

The term “effector memory T cell” refers to a subset of human or mammalian T cells that, like central memory T cells, are CD45RO+, but have lost the constitutive expression of CCR7 (CCR7lo) and are heterogeneous or low for CD62L expression (CD62Llo). The e phenotype of central memory T cells also includes TCR, CD3, CD127 (IL—7R), and IL—lSR. Transcription factors for central memory T cells e . Effector memory T cells rapidly secret high levels of inflammatory cytokines following antigenic stimulation, including interferon-y, IL-4, and lL-S. Effector memory T cells are predominant in the CD8 compartment in blood, and in the human are proportionally enriched in the lung, liver, and gut. CD8+ effector memory T cells carry large amounts of perforin. The term “closed system” refers to a system that is closed to the outside environment. Any closed system appropriate for cell culture methods can be employed with the methods of the present invention. Closed systems include, for example, but are not limited to closed G—containers. Once a tumor segment is added to the closed system, the system is no opened to the outside environment until the TILs are ready to be administered to the patient.

] The terms heral blood mononuclear cells” and “PBMCs” refers to a peripheral blood cell having a round nucleus, including lymphocytes (T cells, B cells, NK cells) and monocytes. Preferably, the peripheral blood mononuclear cells are irradiated allogeneic peripheral blood mononuclear cells.

The term “rapid expansion” means an increase in the number of antigen-specific TILs of at least about 3-fold (or 4-, 5-, 6-, 7-, 8-, or 9-fold) over a period of a week, more preferably at least about 10—fold (or 20—, 30—, 40—, 50—, 60—, 70—, 80—, or 90—fold) over a period of a week, or most preferably at least about lOO-fold over a period of a week. A number of rapid expansion protocols are described herein.

In some embodiments, methods of the present disclosure further e a “pre- REP” stage in which tumor tissue or cells from tumor tissue are grown in standard lab media (including without limitation RPMI) and treated the with reagents such as irradiated feeder cells and anti-CD3 dies to e a desired effect, such as increase in the number of TILS and/or an enrichment of the population for cells containing desired cell surface markers or other structural, biochemical or functional features. The pre-REP stage may e lab grade reagents (under the assumption that the lab grade reagents get diluted out during a later REP stage), making it easier to incorporate alternative strategies for improving TIL production. Therefore, in some embodiments, the disclosed TLR agonist and/or peptide or peptidomimetics can be included in the culture medium during the pre-REP stage. The pre- REP culture can in some embodiments, include IL—2.

The present invention is directed in preferred aspects to novel methods of augmenting REPs with an onal restimulation protocol, sometimes ed to herein as a “restimulation Rapid Expansion Protocol” or “reRE ”, which leads surprisingly to expanded memory T cell subsets, ing the memory effector T cell subset, and/or to marked enhancement in the glycolytic respiration as compared to freshly harvested TILs or thawed cryopreserved TILs for the restimulated TILs (sometimes referred to herein as “reTlLs”).

That is, by using a reREP procedure on cryopreserved TILs, ts can receive highly metabolically active, healthy TILs, g to more favorable outcomes. Such restimulation protocols, also referred to herein as additional “expansions” of the cell populations, are described in further detail herein.

] The terms “fragmenting,” “fragment,” and ented,” as used herein to describe processes for ting a tumor, includes mechanical fragmentation methods such as crushing, g, dividing, and morcellating tumor tissue as well as any other method for disrupting the physical structure of tumor tissue. The term “in vivo” refers to an event that takes place in a subject's body.

] The term “in vitro” refers to an event that takes places outside of a subject's body. In vitro assays encompass cell-based assays in which cells alive or dead are employed and may also encompass a cell-free assay in which no intact cells are employed.

WO 81473 The term “anti-CD3 antibody” refers to an dy or t thereof, e. g., a monoclonal antibody and including human, zed, chimeric or murine antibodies which are directed against the CD3 receptor in the T cell antigen receptor of mature T cells. Anti- CD3 antibodies include OKT-3, also known as muromonab, and . Other anti-CD3 antibodies include, for example, otelixizumab, teplizumab, and visilizumab.

The term “OKT-3” (also referred to herein as “OKT3”) refers to a monoclonal antibody or biosimilar or variant thereof, including human, humanized, chimeric, or murine antibodies, directed against the CD3 receptor in the T cell antigen receptor of mature T cells, and includes commercially-available forms such as OKT-3 (30 ng/mL, MACS GMP CD3 pure, Miltenyi Biotech, Inc, San Diego, CA, USA) and muromonab or variants, conservative amino acid substitutions, glycoforms, or biosimilars thereof The amino acid sequences of the heavy and light chains of muromonab are given in Table 1 (SEQ ID N01 and SEQ ID NO:2). A hybridoma capable of ing OKT—3 is deposited with the American Type Culture Collection and assigned the ATCC accession number CRL 8001. A oma capable of producing OKT-3 is also deposited with European tion of Authenticated Cell Cultures (ECACC) and assigned Catalogue No. 86022706.

TABLE 1. Amino acid sequences of muromonab.

Sequence (One-Letter Amino Acid Symbols) SEQ ID N021 QVQLQQSGAE LARPGASVKM SC<ASGYTFT VKQR PGQGLEWIGY INPSRGYTNY Muromonab heavy NQKFKDKATL STAY MQJSSLTSED SAVYYCARYY DDHYCLDYWG QGTTLTVSSA Chain KTTAPSVYPL APVCGGTTGS SVTLGCLVKG YFPEPVTLTW NSGSLSSGVH TFPAVLQSDL YTLSSSVTVT SSTWPSQSIT CNVAHPASST KVDKKIEPRP KSCDKTHTCP PCPAPELLGG PPKP KDTLMISRTP VDVS HEDPEVKFNW YVDGVEVHNA KTKPREEQYN STYRVVSVLT VLHQDWLNGK EYKCKVSNKA LPAPIEKTIS KAKGQPREPQ VYTLPPSRDE LTKNQVSLTC LVKGFYPSDI AVEWESNGQP TPPV LDSDGSFFLY KSRW QQGNVFSCSV MHEALHNHYT QKSLSLSPGK SEQ ID NO:2 QIVLTQSPAI MSASPGEKVT SSVS YMNWYQQKSG TSPKRWIYDT SKLASGVPAH Muromonab light GTSY SLTISGMEAE DAATYYCQQW SSNPFTFGSG TKLEINRADT APTVSIFPPS chain SEQLTSGGAS NFYP KDINVKWKID GSERQNGVLN SWTDQDSKDS TYSMSSTLTL TKDEYERHNS YTCEATHKTS TSPIVKSFNR NEC The term “IL-2” (also referred to herein as “IL2”) refers to the T cell growth factor known as interleukin-2, and includes all forms of IL-2 including human and mammalian forms, conservative amino acid substitutions, glycoforms, biosimilars, and variants thereof.

IL-2 is described, e.g., in Nelson, J. Immunol. 2004, 172, 3983-88 and Malek, Annu. Rev.

Immunol. 2008, 26, 453-79, the disclosures of which are incorporated by reference herein.

The amino acid sequence of recombinant human IL-2 suitable for use in the invention is given in Table 2 (SEQ ID NO:3). For example, the term IL-2 encompasses human, recombinant forms of IL-2 such as aldesleukin (PROLEUKIN, ble commercially from multiple ers in 22 million IU per single use vials), as well as the form of recombinant IL-2 commercially ed by CellGeniX, Inc., Portsmouth, NH, USA (CELLGRO GMP) or ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. CYTb) and other commercial equivalents from other vendors. Aldesleukin (des-alanyl-l, serine-125 human 1L- 2) is a nonglycosylated human recombinant form of IL-2 with a molecular weight of approximately 15 kDa. The amino acid sequence of aldesleukin suitable for use in the invention is given in Table 2 (SEQ ID N04). The term IL-2 also encompasses pegylated forms of IL-2, as described herein, including the pegylated IL2 prodrug NKTR-214, available from Nektar Therapeutics, South San Francisco, CA, USA. NKTR-214 and pegylated IL-2 suitable for use in the invention is described in US. Patent Application Publication No. US 2014/0328791 A1 and International Patent Application Publication No. the disclosures of which are orated by reference herein. Alternative forms of conjugated IL-2 suitable for use in the invention are described in U. S. Patent Nos. 4,766,106, ,206,344, 5,089,261 and 4902,502, the sures of which are incorporated by reference herein. Formulations of IL-2 suitable for use in the invention are described in US. Patent No. 6,706,289, the disclosure of which is incorporated by reference herein.

TABLE 2. Amino acid sequences of interleukins.

Identifier Sequence (One-Letter Amino Acid s) SEQ ID NO:3 MAPTSSSTKK TQLQLEHLLJ DLQMILNGIN NYKNPKLTRM LTEKEYMPKK ATELKHLQCL recombinant LEEV KNEI LRPRDLISNI NVIVLELKGS ETTEMCEYAD ETATIVEELN human ILi2 RWITECQSII STLT (rhILi2) SEQ ID NO:4 PTSSSTKKTQ LQLEHLLLDJ QMILNGINNY KNPKLTRMLT KKAT ELKHLQCLEE Aidesieukin EVLN LAQSKNEHLR PRDLISNINV IVLELKGSET TEMCEYADET ATIVEELNRW ITESQSIIST LT SEQ ID NO:5 MHKCDITLQE IIKTLNSLTE QKTLCTELTV TDIEAASKNT TEKETECRAA TVLRQEYSHH recombinant EKDTRCLGAT HKQS IRELKRLDRN LWGLAGLNSC PVKEANQSTL ENELERLKTI human ILi4 MREKYSKCSS (rhIL74) SEQ ID N026 MDCDIEGKDG KQYESVLMVS IDQLLDSMKE IGSNCLNNEF NFFKRHICDA NKEGMFLFRA inant ARKLRQELKM NSTGDEDLHu LKVSEGTTIL LNCTGQVKGR KPAALGEAQP TKSLEENKSL human ILi7 KEQKKLNDLC ELKRLLQEI< LMGT KEH (rhIL77) SEQ ID NO:7 MNWVNVISDL KKIEDLIQSM HIDATLYTES DVHPSCKVTA MKCFLLELQV DASI recombinant HDTVENLIIL ANNSLSSNGN KECE ELEEKNIKEE LQSEVHIVQM EINTS human ILelS SEQ ID NO:8 MQDRHMIRMR QLIDIVDQLK VPEE LPAPEDVETN CEWSAESCEQ ANTG recombinant NNERIINVSI KKLKRKPPST NAGRRQKHRL TCPSCDSYEK KPPKEELERF KSLLQKMIHQ human ILi2l HLSSRTHGSE DS (rhILi21) The term “IL-4” (also referred to herein as “IL4”) refers to the cytokine known as interleukin 4, which is produced by Th2 T cells and by eosinophils, basophils, and mast cells.

IL-4 regulates the differentiation of naive helper T cells (Th0 cells) to Th2 T cells. Steinke and Borish, Respir. Res. 2001, 2, 66-70. Upon activation by IL—4, Th2 T cells subsequently produce additional IL-4 in a positive feedback loop. IL—4 also stimulates B cell proliferation and class II MHC expression, and induces class switching to IgE and IgG1 expression from B cells Recombinant human IL-4 suitable for use in the invention is commercially available from multiple suppliers, including ProSpec-Tany TechnoGene Ltd., East Brunswick, NJ, USA (Cat. No. CYT-2l l) and ThermoFisher Scientific, Inc., Waltham, MA, USA (human IL-lS recombinant protein, Cat. No. Gibco CTP0043). The amino acid sequence of recombinant human IL—4 suitable for use in the invention is given in Table 2 (SEQ ID NO:5).

The term “IL-7” (also ed to herein as “IL7”) refers to a glycosylated tissue- derived cytokine known as interleukin 7, which may be obtained from stromal and epithelial cells, as well as from tic cells. Fry and Mackall, Blood 2002, 99, 3892-904. IL-7 can stimulate the development of T cells. IL—7 binds to the IL-7 receptor, a heterodimer consisting of IL-7 receptor alpha and common gamma chain receptor, which in a series of signals important for T cell development within the thymus and survival within the ery.

Recombinant human IL-4 suitable for use in the invention is commercially available from multiple suppliers, including c-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. CYT—254) and Fisher Scientific, Inc., m, MA, USA (human IL-15 recombinant protein, Cat. No. Gibco PHC0071). The amino acid sequence of recombinant human IL-7 suitable for use in the invention is given in Table 2 (SEQ ID NO:6).

The term “IL-15” (also referred to herein as “IL15”) refers to the T cell growth factor known as interleukin-15, and includes all forms of IL-2 including human and mammalian forms, conservative amino acid substitutions, glycoforms, biosimilars, and variants thereof. IL-15 is described, e.g., in Fehniger and Caligiuri, Blood 2001, 97, 14-32, the disclosure of which is orated by reference herein. IL-lS shares [3 and y signaling receptor subunits with IL-2. Recombinant human IL-15 is a single, non-glycosylated ptide chain containing 114 amino acids (and an inal nine) with a molecular mass of 12.8 kDa. Recombinant human IL-15 is commercially available from multiple suppliers, ing ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. 0-b) and ThermoFisher Scientific, Inc., Waltham, MA, USA (human IL-lS recombinant protein, Cat. No. 3482). The amino acid sequence of recombinant human IL-15 le for use in the invention is given in Table 2 (SEQ ID NO:7).

The term “IL-21” (also referred to herein as “IL2l”) refers to the pleiotropic cytokine protein known as interleukin-21, and includes all forms of IL-21 including human and mammalian forms, conservative amino acid substitutions, glycoforms, biosimilars, and variants thereof. IL-21 is described, e.g., in Spolski and Leonard, Nat. Rev. Drug. Disc. 2014, 13, 379-95, the disclosure of which is orated by reference herein. IL-21 is primarily produced by natural killer T cells and activated human CD4+ T cells. Recombinant human IL-21 is a single, non-glycosylated polypeptide chain containing 132 amino acids with a molecular mass of 15.4 kDa. inant human IL-21 is commercially available from multiple suppliers, including ProSpec-Tany TechnoGene Ltd, East Brunswick, NJ, USA (Cat. No. 8-b) and ThermoFisher Scientific, Inc., Waltham, MA, USA (human IL-21 recombinant protein, Cat. No. 1480). The amino acid sequence of recombinant human IL-2l suitable for use in the invention is given in Table 2 (SEQ ID N08).

When “an anti-tumor effective amount77 (C an tumor-inhibiting effective amount”, or “therapeutic amount” is indicated, the precise amount of the compositions of the present invention to be administered can be determined by a ian with consideration of dual differences in age, weight, tumor size, extent of infection or metastasis, and condition of the patient (subject). It can generally be stated that a pharmaceutical composition comprising the genetically modified xic lymphocytes described herein may be administered at a dosage of 104 to 1011 cells/kg body weight (e.g., 105 to 106, 105 to 1010, 105 to 10“, 106 to 1010, 106 to 1011,107 to 10“, 107 to 1010, 108 to 10“, 108 to 1010, 109 to 10“, or 109 to 1010 cells/kg body weight), including all integer values within those ranges.

Genetically modified xic lymphocytes compositions may also be administered multiple times at these dosages. The genetically modified cytotoxic lymphocytes can be administered by using infusion techniques that are ly known in immunotherapy (see, e.g., Rosenberg et al., New Eng. J. ofMed. 319: 1676, 1988). The optimal dosage and treatment regime for a particular patient can readily be determined by one skilled in the art of medicine by monitoring the patient for signs of disease and adjusting the treatment accordingly.

The term “hematological malignancy” refers to mammalian cancers and tumors of the hematopoietic and id s, including but not limited to tissues of the blood, bone marrow, lymph nodes, and lymphatic system. logical malignancies are also referred to as d tumors.” Hematological malignancies e, but are not limited to, acute lymphoblastic leukemia (ALL), chronic lymphocytic lymphoma (CLL), small lymphocytic lymphoma (SLL), acute myelogenous leukemia (AML), chronic myelogenous leukemia (CML), acute monocytic leukemia (AMoL), n's ma, and non- Hodgkin's lymphomas. The term “B cell hematological malignancy” refers to hematological malignancies that affect B cells.

The term “solid tumor” refers to an abnormal mass of tissue that usually does not contain cysts or liquid areas. Solid tumors may be benign or malignant. The term “solid tumor cancer refers to malignant, neoplastic, or cancerous solid tumors. Solid tumor cancers include, but are not limited to, sarcomas, carcinomas, and lymphomas, such as s of the lung, breast, prostate, colon, rectum, and bladder. The tissue structure of solid tumors includes interdependent tissue compartments including the parenchyma (cancer cells) and the supporting l cells in which the cancer cells are dispersed and which may provide a ting microenvironment.

The term “liquid tumor” refers to an abnormal mass of cells that is fluid in nature.

Liquid tumor cancers include, but are not limited to, ias, myelomas, and mas, as well as other hematological malignancies. TILs obtained from liquid tumors may also be referred to herein as marrow infiltrating lymphocytes (MILs).

The term “microenvironment,” as used herein, may refer to the solid or hematological tumor microenvironment as a whole or to an individual subset of cells within the nvironment. The tumor nvironment, as used herein, refers to a x mixture of , soluble factors, signaling molecules, extracellular matrices, and mechanical cues that promote neoplastic transformation, support tumor growth and on, protect the tumor from host immunity, foster therapeutic resistance, and provide niches for dominant metastases to thrive,” as described in Swartz, et al, Cancer Res, 2012, 72, 2473. Although tumors express antigens that should be recognized by T cells, tumor clearance by the immune system is rare because of immune suppression by the microenvironment.

In an ment, the invention includes a method of treating a cancer with a population of rTILs, wherein a patient is pre-treated with non-myeloablative chemotherapy prior to an infusion of rTILs according to the invention. In some embodiments, the population of rTILs may be ed with a tion of eTils, wherein a patient is pre-treated with nonmyeloablative chemotherapy prior to an infusion of rTILs and eTils according to the invention. In an ment, the non-myeloablative chemotherapy is cyclophosphamide 60 mg/kg/d for 2 days (days 27 and 26 prior to rTIL infusion) and fludarabine 25 mg/m2/d for 5 days (days 27 to 23 prior to rTIL infusion). In an embodiment, after non-myeloablative chemotherapy and rTlL infusion (at day 0) according to the invention, the patient receives an intravenous infusion of IL-2 intravenously at 720,000 IU/kg every 8 hours to physiologic tolerance.

Experimental s te that lymphodepletion prior to adoptive transfer of specific T lymphocytes plays a key role in enhancing treatment efficacy by eliminating regulatory T cells and ing elements of the immune system (“cytokine ).

Accordingly, some embodiments of the invention utilize a lymphodepletion step (sometimes also referred to as “immunosuppressive conditioning”) on the patient prior to the introduction of the rTILs of the invention.

The terms “co-administration, 77 cc co-administering, )7 (C administered in combination with,” “administering in combination with,” “simultaneous,” and “concurrent,” as used herein, ass administration of two or more active pharmaceutical ingredients (in a red embodiment of the present invention, for example, at least one ium channel agonist in combination with a plurality of TILs) to a subject so that both active pharmaceutical ingredients and/or their metabolites are present in the subject at the same time. Co—administration includes simultaneous administration in separate compositions, administration at ent times in separate compositions, or administration in a composition in which two or more active pharmaceutical ingredients are present. Simultaneous administration in separate compositions and administration in a composition in which both agents are present are preferred.

The term “effective amount” or “therapeutically ive amount” refers to that amount of a compound or combination of compounds as described herein that is sufficient to effect the intended application including, but not limited to, disease treatment. A eutically effective amount may vary depending upon the intended application (in vitro or in vivo), or the subject and disease condition being treated (e.g, the weight, age and gender of the subject), the severity of the disease condition, or the manner of administration.

The term also applies to a dose that will induce a particular response in target cells (e.g., the reduction of platelet adhesion and/or cell migration). The specific dose will vary depending on the particular compounds chosen, the dosing regimen to be followed, whether the compound is administered in ation with other compounds, timing of administration, the tissue to which it is administered, and the physical delivery system in which the compound is carried.

The terms “treatment”, “treating”, “treat”, and the like, refer to ing a desired pharmacologic and/or physiologic effect. The effect may be prophylactic in terms of completely or partially preventing a disease or symptom f and/or may be therapeutic in terms of a partial or complete cure for a disease and/or e effect attributable to the disease. “Treatment”, as used herein, covers any treatment of a disease in a mammal, particularly in a human, and includes: (a) preventing the disease from occurring in a subject which may be predisposed to the disease but has not yet been diagnosed as having it, (b) inhibiting the e, i.e., arresting its development or ssion; and (c) relieving the e, i.e., g regression of the disease and/or relieving one or more disease symptoms. “Treatment” is also meant to encompass ry of an agent in order to provide for a pharmacologic effect, even in the absence of a disease or condition. For example, ment” encompasses delivery of a composition that can elicit an immune response or confer immunity in the absence of a disease condition, e.g., in the case of a vaccine.

The term “heterologous” when used with reference to ns of a nucleic acid or protein indicates that the nucleic acid or protein ses two or more subsequences that are not found in the same relationship to each other in nature. For instance, the nucleic acid is typically recombinantly produced, having two or more sequences from unrelated genes arranged to make a new functional nucleic acid, e.g., a promoter from one source and a coding region from another , or coding regions from different s. Similarly, a heterologous protein indicates that the protein ses two or more subsequences that are not found in the same relationship to each other in nature (e. g., a fusion protein).

The terms “sequence identity, 77 capercent identity,” and “sequence percent ty” (or synonyms thereof, e.g., “99% identical”) in the context of two or more nucleic acids or polypeptides, refer to two or more sequences or uences that are the same or have a specified percentage of nucleotides or amino acid residues that are the same, when compared and aligned ducing gaps, if necessary) for maximum correspondence, not considering any conservative amino acid substitutions as part of the sequence identity. The percent identity can be measured using sequence comparison software or algorithms or by visual inspection. Various algorithms and software are known in the art that can be used to obtain alignments of amino acid or nucleotide sequences. Suitable programs to determine t sequence identity include for example the BLAST suite of programs available from the U. S.

Government’ 5 National Center for Biotechnology Information BLAST web site.

Comparisons between two sequences can be carried using either the BLASTN or BLASTP algorithm. BLASTN is used to e nucleic acid sequences, while BLASTP is used to compare amino acid sequences. ALIGN, ALIGN-Z (Genentech, South San Francisco, California) or MegAlign, available from DNASTAR, are additional publicly available software programs that can be used to align sequences. One skilled in the art can determine appropriate parameters for maximal ent by particular alignment software. In certain embodiments, the t parameters of the alignment software are used.

As used herein, the term “variant” encompasses but is not limited to antibodies or fusion proteins which comprise an amino acid sequence which differs from the amino acid sequence of a reference antibody by way of one or more substitutions, deletions and/or additions at certain positions within or adjacent to the amino acid sequence of the reference antibody. The variant may comprise one or more conservative substitutions in its amino acid sequence as compared to the amino acid sequence of a nce dy. Conservative substitutions may involve, e. g., the substitution of similarly d or uncharged amino acids. The variant retains the y to specifically bind to the antigen of the reference antibody. The term variant also includes pegylated antibodies or proteins.

The term “in viva” refers to an event that takes place in a subject's body.

The term “in vitro” refers to an event that takes places outside of a subject's body. In vitro assays encompass cell-based assays in which cells alive or dead are employed and may also encompass a cell-free assay in which no intact cells are employed.

The term “rapid ion” means an increase in the number of antigen-specific TILs of at least about 3-fold (or 4-, 5-, 6-, 7-, 8-, or ) over a period of a week, more ably at least about 10-fold (or 20-, 30-, 40-, 50-, 60-, 70-, 80-, or 90-fold) over a period of a week, or most preferably at least about lOO-fold over a period of a week. A number of rapid expansion protocols are outlined below.

III. Restimulation of Cyropreserved TILs As discussed , the present invention relates to the restimulation of cryopreserved TILs to increase their metabolic activity and thus ve health prior to transplant into a patient, and methods of testing said metabolic health. As generally outlined , TILs are generally taken from a patient sample and manipulated to expand their number prior to transplant into a patient. In some embodiments, the TILs may be optionally genetically lated as discussed below, and then cryopreserved. Once thawed, they are then restimulated to increase their metabolism prior to infusion into a patient.

The “Step” Designations A, B, C, etc, below are in reference to Figure 11. The ordering of the Steps below and in Figure 11 is exemplary and any combination or order of WO 81473 steps, as well as additional steps, repetition of steps, and/or omission of steps is contemplated by the t application and the methods disclosed herein.

A. STEP A: Obtain Patient Tumor Sample In general, TILs are lly obtained from a t tumor sample (“primary TILs”) and then expanded into a larger population for further manipulation as described herein, optionally cryopreserved, restimulated as outlined herein and optionally evaluated for phenotype and lic parameters as an indication of TIL health.

A patient tumor sample may be ed using methods known in the art, generally via surgical resection, needle biopsy or other means for obtaining a sample that contains a mixture of tumor and TIL cells. In general, the tumor sample may be from any solid tumor, including primary tumors, invasive tumors or metastatic tumors. The tumor sample may also be a liquid tumor, such as a tumor obtained from a hematological malignancy. The solid tumor may be of any cancer type, including, but not limited to, breast, pancreatic, prostate, colorectal, lung, brain, renal, stomach, and skin (including but not limited to squamous cell carcinoma, basal cell carcinoma, and ma). In some embodiments, useful TILs are obtained from malignant melanoma tumors, as these have been ed to have ularly high levels of TILs.

The term “solid tumor” refers to an abnormal mass of tissue that usually does not contain cysts or liquid areas. Solid tumors may be benign or malignant. The term “solid tumor cancer refers to malignant, stic, or cancerous solid tumors. Solid tumor cancers include, but are not d to, sarcomas, carcinomas, and lymphomas, such as cancers of the lung, breast, triple negative breast cancer, prostate, colon, rectum, and bladder. In some embodiments, the cancer is selected from cervical cancer, head and neck cancer, glioblastoma, ovarian cancer, sarcoma, pancreatic cancer, bladder cancer, breast cancer, triple ve breast cancer, and non-small cell lung oma. The tissue structure of solid tumors includes interdependent tissue compartments including the parenchyma (cancer cells) and the supporting stromal cells in which the cancer cells are dispersed and which may provide a supporting microenvironment.

The term “hematological malignancy” refers to mammalian cancers and tumors of the hematopoietic and lymphoid tissues, including but not limited to tissues of the blood, bone marrow, lymph nodes, and lymphatic system. Hematological malignancies are also referred to as “liquid tumors.” Hematological malignancies include, but are not d to, acute lymphoblastic leukemia (ALL), chronic lymphocytic ma (CLL), small lymphocytic lymphoma (SLL), acute myelogenous leukemia (AML), chronic myelogenous leukemia (CML), acute monocytic leukemia (AMoL), n's lymphoma, and non- Hodgkin's lymphomas. The term “B cell hematological malignancy” refers to hematological malignancies that affect B cells.

Once obtained, the tumor sample is generally fragmented using sharp tion into small pieces of between 1 to about 8 mm3, with from about 2-3 mm3 being particularly useful. The TILs are cultured from these fragments using enzymatic tumor digests. Such tumor digests may be produced by incubation in enzymatic media (e.g, Roswell Park Memorial Institute (RPMI) 1640 buffer, 2 mM ate, lO mcg/mL gentamicine, 30 units/mL of DNase and 1.0 mg/mL of collagenase) followed by ical dissociation (e.g., using a tissue dissociator). Tumor digests may be produced by placing the tumor in enzymatic media and mechanically dissociating the tumor for approximately 1 minute, followed by incubation for 30 minutes at 37 °C in 5% C02, ed by repeated cycles of mechanical iation and incubation under the foregoing conditions until only small tissue pieces are present. At the end of this s, if the cell suspension contains a large number of red blood cells or dead cells, a density gradient separation using FICOLL branched hilic polysaccharide may be med to remove these cells. Alternative methods known in the art may be used, such as those described in US. Patent ation Publication No. 2012/0244133 Al, the disclosure of which is incorporated by reference herein. Any of the foregoing s may be used in any of the embodiments described herein for methods of expanding TILs or methods treating a cancer.

In some embodiments, fragmentation includes physical fragmentation, including for e, dissection as well as digestion. In some embodiments, the fragmentation is physical fragmentation. In some embodiments, the fragmentation is dissection. In some embodiments, the fragmentation is by digestion. In some embodiments, TILs can be initially ed from enzymatic tumor digests and tumor fragments obtained from patients.

In some embodiments, where the tumor is a solid tumor, the tumor undergoes physical fragmentation after the tumor sample is obtained, for example such as in Step A of Figure 11. In some embodiments, the fragmentation occurs before cryopreservation. In some embodiments, the fragmentation occurs after cryopreservation. In some embodiments, the fragmentation occurs after obtaining the tumor and in the absence of any cryopreservation. In some embodiments, the tumor is fragmented and 2, 3, or 4 fragments or pieces are placed in each ner for the first expansion. In some ments, the tumor is fragmented and 3 or 4 fragments or pieces are placed in each container for the first expansion. In some embodiments, the tumor is fragmented and 4 fragments or pieces are placed in each container for the first expansion, In some embodiments, the TILs are obtained from tumor fragments. In some embodiments, the tumor fragment is obtained sharp dissection. In some embodiments, the tumor fragment is between about 1 mm3 and 10 mm3. In some embodiments, the tumor fragment is between about 1 mm3 and 8 mm3. In some embodiments, the tumor fragment is about 1 mm3. In some embodiments, the tumor fragment is about 2 mm3. In some embodiments, the tumor nt is about 3 mm3. In some embodiments, the tumor fragment is about 4 mm3. In some embodiments, the tumor fragment is about 5 mm3. In some embodiments, the tumor fragment is about 6 mm3. In some embodiments, the tumor fragment is about 7 mm3. In some embodiments, the tumor fragment is about 8 mm3. In some embodiments, the tumor fragment is about 9 mm3. In some embodiments, the tumor fragment is about 10 mm3.

In some embodiments, the TILs are obtained from tumor digests. In some embodiments, tumor digests were generated by incubation in enzyme media, for example but not limited to RPMI 1640, 2 mM AX, 10 mg/mL gentamicin, 3O U/mL DNase, and 1.0 mg/mL collagenase, followed by ical dissociation (GentleMACS, Miltenyi Biotec, Auburn, CA). After placing the tumor in enzyme media, the tumor can be mechanically dissociated for approximately 1 minute. The solution can then be incubated for 30 minutes at 37°C in 5% C02 and it then mechanically disrupted again for approximately 1 . After being incubated again for 30 minutes at 37°C in 5% C02, the tumor can be mechanically disrupted a third time for approximately 1 minute. In some embodiments, after the third ical disruption if large pieces of tissue were t, 1 or 2 additional mechanical dissociations were applied to the sample, with or without 30 additional minutes of incubation at 37°C in 5% C02. In some embodiments, at the end of the final incubation if the cell sion contained a large number of red blood cells or dead cells, a density gradient separation using Ficoll can be performed to remove these cells.

In some embodiments, the harvested cell suspension prior to the first expansion step is called a “primary cell tion” or a “freshly harvested” cell population.

In some embodiments, cells can be optionally frozen after sample harvest and stored frozen prior to entry into Step B, which is described in further detail below.

B. STEP B: First Expansion In some embodiments, a first expansion of TILs (also referred to as a first expansion or first TIL expansion) may be performed using an initial bulk TIL expansion step (for example, Step B as indicated in Figure ll or a first expansion step, this can include an ion step referred to as preREP) as described below and herein, followed by a second expansion step (for example, Step D as indicated in Figure 11; which can include as an e what is referred to as a rapid expansion protocol (REP) step) as described below and herein, followed by optional cryopreservation (for e, after Step D as indicated in Figure 11), and followed by an additional second expansion (for example, a second Step D, as indicated in Figure 11, which can include what is sometimes referred to as a restimulation REP step) as bed below and herein. The TILs obtained from this s may be optionally characterized for phenotypic characteristics and lic parameters as described herein. In some embodiments, the TILs are frozen (116., cryopreserved) after the first expansion (for example, Step B as indicated in Figure 11) and stored until phenotyped for selection then thawed prior to proceeding to one or more second expansion steps (for example, one or more expansion according to Step D as indicated in Figure 11).

In some embodiments, where the cells are frozen after obtained from the tumor sample (such as, for example, during in Step A as indicated in Figure 11), the cells are thawed prior to the first expansion (for example, Step B as indicated in Figure 11).

In embodiments where TIL cultures are initiated in 24-well plates, for example, using Costar 24-well cell culture cluster, flat bottom (Corning Incorporated, Corning, NY, each well can be seeded with lxlO6 tumor digest cells or one tumor nt in 2 mL of complete medium (CM) with IL-2 (6000 IU/mL, Chiron Corp, Emeryville, CA). In some ments, the tumor fragment is between about 1mm3 and 10 mm3.

After preparation of the tumor nts, the resulting cells (i.e., fragments) are cultured in serum ning IL—2 under conditions that favor the growth of TILs over tumor and other cells. In some embodiments, the tumor digests are incubated in 2 mL wells in media comprising inactivated human AB serum (or, in some cases, as outlined , in the presence of aAPC cell population) with 6000 IU/mL of IL-2. This primary cell population is ed for a period of days, generally from 10 to 14 days, resulting in a bulk TIL population, generally about 1 X 108 bulk TIL cells. In some embodiments, the growth media during the first expansion comprises IL-2 or a variant thereof. In some embodiments, the IL is recombinant human [L-2 (rh[L-2). In some embodiments the IL-2 stock solution has a specific activity of 20-30x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 20-x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 25x106 IU/mg for a 1 mg vial. In some ments the IL-2 stock solution has a specific activity of 30x106 IU/mg for a 1 mg vial.

In some embodiments, the IL- 2 stock solution has a final concentration of 4-8x106 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final concentration of 6 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final concentration of 6x106 IU/mg of IL-2. In some embodiments, the IL-2 stock solution is prepare as described in Example 4. In some embodiments, first ion culture media comprises about 10,000 IU/mL of IL-2, about 9,000 IU/mL of IL-2, about 8,000 IU/mL of IL—2, about 7,000 IU/mL of IL—2, about 6000 IU/mL of IL-2 or about 5,000 IU/mL of IL-2. In some embodiments, first expansion culture media comprises about 9,000 IU/mL of IL-2, to about 5,000 IU/mL of IL- 2. In some embodiments, first expansion culture media comprises about 8,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media ses about 7,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion e media comprises about 6,000 IU/mL of IL-2. In an embodiment, the cell culture medium further comprises IL-2. In some embodiments, the cell culture medium comprises about 3000 IU/mL of IL-2. In an ment, the cell culture medium comprises about 1000 IU/mL, about 1500 IU/mL, about 2000 IU/mL, about 2500 IU/mL, about 3000 IU/mL, about 3500 IU/mL, about 4000 IU/mL, about 4500 IU/mL, about 5000 IU/mL, about 5500 IU/mL, about 6000 IU/mL, about 6500 IU/mL, about 7000 IU/mL, about 7500 IU/mL, or about 8000 IU/mL of IL—2. In an embodiment, the cell culture medium comprises between 1000 and 2000 IU/mL, n 2000 and 3000 IU/mL, between 3000 and 4000 IU/mL, between 4000 and 5000 IU/mL, between 5000 and 6000 IU/mL, between 6000 and 7000 IU/mL, n 7000 and 8000 IU/mL, or between 8000 IU/mL of IL-2.

In some embodiments, the first expansion culture medium is referred to as “CM”, an abbreviation for culture media. In some embodiments, it is referred to as CMl (culture medium 1). In some embodiments, CM consists ofRPMI 1640 with AX, supplemented with 10% human AB serum, 25mM Hepes, and 10 mg/mL gentamicin. In embodiments where cultures are initiated in gas-permeable flasks with a 40 mL capacity and a 10cm2 gas-permeable silicon bottom (for example, G-Rex10, Wilson Wolf Manufacturing, New Brighton, MN) (Fig. 1), each flask was loaded with 10—40x 106 Viable tumor digest cells or 5—30 tumor fragments in 10—40mL of CM with IL-2. Both the G-RexlO and 24-well plates were incubated in a humidified incubator at 37°C in 5% C02 and 5 days after culture initiation, half the media was removed and replaced with fresh CM and IL-2 and after day 5, half the media was changed every 2—3 days. In some embodiments, the CM is the CM] described in the Examples, see, Example 5. In some embodiments, the first expansion occurs in an initial cell culture medium or a first cell culture medium. In some embodiments, the initial cell culture medium or the first cell culture medium comprises 1L-2.

In some embodiments, the first TIL expansion can proceed for 11 days, 12 days, 13 days, 14 days, 15 days, 16 days, 17 days, 18 days, 19 days, 20 days, or 21 days. In some embodiments, the first TIL expansion can proceed for 11 days to 21 days. In some embodiments, the first TIL expansion can proceed for 12 days to 21 days. In some embodiments, the first TIL ion can proceed for 13 days to 21 days. In some embodiments, the first TIL ion can proceed for 14 days to 21 days. In some embodiments, the first TIL expansion can proceed for 15 days to 21 days. In some embodiments, the first TIL expansion can proceed for 16 days to 21 days. In some embodiments, the first TIL expansion can proceed for 17 days to 21 days. In some embodiments, the first TIL expansion can proceed for 18 days to 21 days. In some embodiments, the first TIL expansion can proceed for 19 days to 21 days. In some ments, the first TIL expansion can proceed for 20 days to 21 days. In some embodiments, the first TIL expansion can proceed for 21 days.

C. STEP C: First Expansion to Second Expansion Transition In some embodiments, the TILs obtained from the first expansion (for example, from Step B as indicated in Figure 11) are stored until phenotyped for selection. In some embodiments, the TILs ed from the first expansion are eserved after the first expansion and prior to the second ion. In some embodiments, the TILs are cryopreserved as part of the first expansion to second ion transition. For example, in some embodiments, the TILs are cryopreserved after Step B and before Step D as indicated in Figure 11. In some embodiments, the TILs are eserved and thawed as part of the first expansion to second expansion tion. For example, in some ments, the TILs are cryopreserved after Step B then thawed prior to proceeding to Step D (as provided in Figure 11). In some embodiments, the transition from the first expansion to the second expansion occurs at about 22 days, 23, days, 24 days, 25 days, 26 days, 27 days, 28 days, 29 days, or 30 days from when fragmentation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 22 days to 30 days from when ntation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 24 days to 30 days from when fragmentation . In some embodiments, the transition from the first expansion to the second expansion occurs at about 26 days to 30 days from when fragmentation occurs. In some embodiments, the transition from the first ion to the second expansion occurs at about 28 days to 30 days from when fragmentation occurs. In some embodiments, the transition from the first expansion to the second expansion occurs at about 30 days from when ntation occurs.

D. STEP D: Second Expansion In some embodiments, the second expansion or second TIL ion (which can include expansions sometimes referred to as REP) of TIL can be performed using any TIL flasks or containers known by those of skill in the art. In some embodiments, the second TIL expansion can proceed for 14 days, 15 days, 16 days, 17 days, 18 days, 19 days, 20 days, 21 days, or 22 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 22 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 20 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 18 days. In some embodiments, the second TIL expansion can proceed for about 14 days to about 16 days. In some embodiments, the second TIL expansion can proceed for about 14 days.

In some embodiments, the second expansion occurs in a supplemented cell culture medium. In some embodiments, the supplemented cell culture medium comprises lL-2, OKT- 3, and antigen-presenting feeder cells. In some embodiments, the second cell culture medium comprises IL—2, OKT—3, and antigen—presenting cells (APCs, also referred to as antigen— presenting feeder cells).

In some embodiments, the second expansion (which can include expansions referred to as REP) of TILs can be performed using T-175 flasks and gas-permeable bags as previously described (Tran KQ, Zhou J, Durflinger KH, et al., 2008, JImmunother., 31 :742— 751, and Dudley ME, Wunderlich JR, n TE, et al. 2003, JImmunother., 26:332—342) or rmeable G-Rex flasks. In some embodiments, the second expansion is performed using flasks. In some embodiments, the second expansion is performed using gas-permeable G—Rex flasks. For TIL the second expansion in T-175 flasks, about 1 x 106 TIL are suspended in about 150 mL of media and this is added to each T-175 flask. The TIL are cultured with irradiated (50 Gy) allogeneic PBMC as “feeder” cells at a ratio of 1 to 100 and the cells were cultured in a 1 to 1 mixture of CM and AIM-V medium (50/50 medium), mented with 3000 IU/mL of IL-2 and 30 ng/mL of anti-CD3. The T-175 flasks are incubated at 37°C in 5% C02. In some embodiments, half the media is d 5 days into the second expansion using 50/50 medium with 3000 IU/mL of IL-2. In some embodiments, on day 7, cells from 2 T-175 flasks are combined in a 3 L bag and 300 mL of AIM-V with 5% human AB serum and 3000 IU/mL of IL-2 is added to the 300 mL of TIL suspension. The number of cells in each bag can be counted every day or two and fresh media can be added to keep the cell count between about 0.5 and about 2.0 x 106 cells/mL.

In some ments, the second expansion (which can include expansions referred to as REP) of TIL can be performed in 500 mL capacity gas permeable flasks with 100 cm2 gas-permeable silicon bottoms (G—Rex 100, commercially available from Wilson Wolf Manufacturing Corporation, New Brighton, MN, USA) (Fig. 1), about 5 x 106 or 10 x 106 TIL are cultured with irradiated allogeneic PBMC at a ratio of 1 to 100 in 400 mL of 50/50 medium, supplemented with 3000 IU/mL of IL-2 and 30 ng/ mL of anti- CD3 . The G—RexlOO flasks can be incubated at 37°C in 5% C02. In some embodiments, 5 days into the second expansion, 250 mL of supernatant is removed and placed into centrifuge bottles and centrifuged at 1500 rpm (491 x g) for 10 minutes. The TIL pellets can then be resuspended with 150 mL of fresh medium with 5% human AB serum, 3000 IU per mL of IL-2 and added back to the original G—RexlOO flasks. In embodiments where TILs are expanded serially in G—RexlOO flasks, on day 7 the TIL in each OO are suspended in the 300 mL of media t in each flask and the cell suspension was divided into three 100 mL ts that can be used to seed three G—RexlOO flasks. Then 150 mL of AIM—V with 5% human AB serum and 3000 IU per mL of IL-2 can be added to each flask. The G—RexlOO flasks can be incubated at 37°C in 5% CO2 and after 4 days in to the second expansion, 150 mL of AIM-V with 3000 IU per mL of IL-2 can be added to each G—Rex100 flask. In some embodiments, the cells are harvested on day 14 of culture.

In some embodiments, the second expansion (which can include expansions referred to as REP) of TIL can be med in a gas permeable container. For example, TILs can be rapidly expanded using non-specific T-cell receptor stimulation in the ce of interleukin-2 (IL-2) or interleukin-15 (IL-15). In an ment, expansion of the number of TILs uses about 1 x 109 to about 1 x 1011 antigen-presenting feeder cells. The non-specific T- cell receptor stimulus can include, for e, about 30 ng/ml of OKT3, a mouse monoclonal anti-CD3 antibody (commercially available from Ortho-McNeil, Raritan, NJ or Miltenyi Biotech, Auburn, CA). TILs can be rapidly expanded fiirther stimulation of the TILs in vitro with one or more ns, including antigenic portions thereof, such as epitope(s), of the cancer, which can be optionally expressed from a vector, such as a human leukocyte antigen A2 (HLA-AZ) binding peptide, e.g., 0.3 uM MART-l :26-35 (27 L) or gpl 00:209— 217 (210M), optionally in the presence of a T-cell growth factor, such as 300 IU/mL IL-2 or IL-15. Other suitable antigens may include, e.g., NY-ESO-l, TRP-l, TRP-Z, tyrosinase cancer antigen, MAGE—A3, SSX—2, and VEGFRZ, or antigenic portions thereof. TIL may also be rapidly expanded by re-stimulation with the same antigen(s) of the cancer pulsed onto HLA-AZ-expressing antigen-presenting cells. Alternatively, the TILs can be further re- stimulated with, e.g., example, irradiated, gous lymphocytes or with irradiated HLA— A2+ allogeneic lymphocytes and IL-2.

] In some ments, the second expansion (which can include expansions referred to as REP) of TIL can be performed in 500 mL capacity gas permeable flasks with 100 cm gas-permeable silicon bottoms (G—Rex 100, commercially ble from Wilson Wolf Manufacturing Corporation, New on, MN, USA), 5 X 106 or 10 X 106 TIL may be ed with aAPCs at a ratio of l to 100 in 400 mL of 50/50 medium, supplemented with % human AB serum, 3000 IU per mL of IL-2 and 30 ng per ml of anti-CD3 (OKT3). The G—Rex 100 flasks may be incubated at 37°C in 5% C02. On day 5, 250 mL of supernatant may be removed and placed into centrifuge bottles and centrifuged at 1500 rpm (491 X g) for minutes. The TIL pellets may be re-suspended with 150 mL of fresh medium with 5% human AB serum, 3000 IU per mL of IL-2, and added back to the original G—Rex 100 flasks.

When TIL are expanded serially in G—Rex 100 flasks, on day 7 the TIL in each G—Rex 100 may be suspended in the 300 mL of media present in each flask and the cell suspension may be d into 3 100 mL aliquots that may be used to seed 3 G—Rex 100 flasks. Then 150 mL of AIM-V with 5% human AB serum and 3000 IU per mL of IL-2 may be added to each flask. The G—Rex 100 flasks may be incubated at 37° C in 5% C02 and after 4 days 150 mL of AIM-V with 3000 IU per mL of IL-2 may be added to each G—RexlOO flask. The cells may be harvested on day 14 of culture.

In one embodiment, the second expansion (including expansions ed to as REP) is performed in flasks with the bulk TILs being mixed with a 100- or ld excess of inactivated feeder cells, 30 mg/mL OKT3 anti-CD3 antibody and 3000 IU/mL IL-2 in 150 ml media. Media replacement is done ally 2/3 media replacement via respiration with fresh media) until the cells are transferred to an alternative growth chamber. Alternative growth chambers include GRex flasks and gas ble containers as more fully discussed below.

In another embodiment, the second ion (including ions referred to as REP) is performed and further comprises a step wherein TILs are selected for superior tumor reactivity. Any selection method known in the art may be used. For example, the methods described in US. Patent Application Publication No. 2016/0010058 Al, the disclosures of which are incorporated herein by nce, may be used for selection of TILs for superior tumor reactivity.

Optionally, a cell viability assay can be performed after the second ion (including expansions referred to as the REP expansion), using standard assays known in the art. For e, a trypan blue exclusion assay can be done on a sample of the bulk TILs, which selectively labels dead cells and allows a viability assessment. In some embodiments, TIL samples can be counted and viability determined using a Cellometer K2 automated cell counter (Nexcelom Bioscience, ce, MA). In some embodiments, viability is ined according to the Cellometer K2 Image Cytometer Automatic Cell Counter protocol described, for example, in Example 2.

In some embodiments, cells are grown for 7 days, 8 days, 9 days, 10 days, or 11 days of the total second expansion time before being split into more than one container or flask.

In some embodiments, the second expansion culture medium (e. g., sometimes referred to as CM2 or the second cell culture medium), comprises IL-2, OKT-3, as well as the antigen—presenting feeder cells (APCs), as discussed in more detail below.

In some embodiments, the antigen-presenting feeder cells are PBMCS. In some embodiments, the antigen-presenting feeder cells are ial antigen-presenting feeder cells.

In an embodiment, the ratio of TILs to antigen-presenting feeder cells in the second expansion is about 1 to 25, about 1 to 50, about 1 to 100, about 1 to 125, about 1 to 150, about 1 to 175, about 1 to 200, about 1 to 225, about 1 to 250, about 1 to 275, about 1 to 300, about 1 to 325, about 1 to 350, about 1 to 375, about 1 to 400, or about 1 to 500. In an embodiment, the ratio of TILs to antigen-presenting feeder cells in the second expansion is n 1 to 50 and l to 300. In an embodiment, the ratio of TILs to antigen-presenting feeder cells in the second expansion is between 1 to 100 and l to 200.

In an embodiment, the TIL expansion procedures described herein require an excess of feeder cells during the second ion (including for e, expansions referred to as REP TIL expansions). In many embodiments, the feeder cells are peripheral blood mononuclear cells (PBMCs) obtained from standard whole blood units from healthy blood donors. The PBMCs are obtained using standard methods such as Ficoll-Paque gradient separation. In an embodiment, artificial antigen-presenting (aAPC) cells are used in place of PBMCS.

In general, the allogenic PBMCs are inactivated, either via irradiation or heat treatment, and used in the REP procedures.

In some embodiments, the growth media during the first expansion comprises lL-2 or a t thereof. In some embodiments, the IL is recombinant human IL-2 2). In some ments the IL-2 stock on has a specific activity of 20-30x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 20-xlO6 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 25x106 IU/mg for a 1 mg vial. In some embodiments the IL-2 stock solution has a specific activity of 30x106 IU/mg for a 1 mg vial. In some embodiments, the IL- 2 stock solution has a final concentration of 4-8x106 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final concentration of 5-7x106 IU/mg of IL-2. In some embodiments, the IL- 2 stock solution has a final tration of 6x106 IU/mg of [L-2. In some embodiments, the IL-2 stock solution is prepare as described in Example 4. In some embodiments, first expansion culture media comprises about 10,000 IU/mL of IL-2, about 9,000 IU/mL of IL-2, about 8,000 IU/mL of IL-2, about 7,000 IU/mL of IL-2, about 6000 IU/mL of IL-2 or about 5,000 IU/mL of IL-2. In some ments, first expansion culture media comprises about 9,000 IU/mL of IL-2, to about 5,000 IU/mL of IL-2. In some ments, first expansion culture media comprises about 8,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media comprises about 7,000 IU/mL of IL-2, to about 6,000 IU/mL of IL-2. In some embodiments, first expansion culture media ses about 6,000 IU/mL of IL-2. In an embodiment, the cell culture medium further comprises IL-2. In some embodiments, the cell culture medium comprises about 3000 IU/mL of IL-2. In an embodiment, the cell culture medium comprises about 1000 IU/mL, about 1500 IU/mL, about 2000 IU/mL, about 2500 IU/mL, about 3000 IU/mL, about 3500 IU/mL, about 4000 IU/mL, about 4500 IU/mL, about 5000 IU/mL, about 5500 IU/mL, about 6000 IU/mL, about 6500 IU/mL, about 7000 IU/mL, about 7500 IU/mL, or about 8000 IU/mL of IL-2. In an embodiment, the cell culture medium comprises between 1000 and 2000 IU/mL, between 2000 and 3000 IU/mL, between 3000 and 4000 IU/mL, between 4000 and 5000 IU/mL, between 5000 and 6000 IU/mL, between 6000 and 7000 IU/mL, between 7000 and 8000 IU/mL, or between 8000 IU/mL of IL-2.

In some embodiments, the second expansion cell e media also includes an anti-CD3 antibody. In some embodiment, the cell culture medium comprises OKT3 antibody.

In some ments, the cell culture medium comprises about 30 ng/mL of OKT3 antibody. In an embodiment, the cell e medium comprises about 0.1 ng/mL, about 0.5 ng/mL, about 1 ng/mL, about 2.5 ng/mL, about 5 ng/mL, about 7.5 ng/mL, about 10 ng/mL, about 15 ng/mL, about 20 ng/mL, about 25 ng/mL, about 30 ng/mL, about 35 ng/mL, about 40 ng/mL, about 50 ng/mL, about 60 ng/mL, about 70 ng/mL, about 80 ng/mL, about 90 ng/mL, about 100 ng/mL, about 200 ng/mL, about 500 ng/mL, and about 1 ug/mL of OKT3 antibody. In an embodiment, the cell culture medium comprises between 0.1 ng/mL and 1 ng/mL, between 1 ng/mL and 5 ng/mL, n 5 ng/mL and 10 ng/mL, between 10 ng/mL and 20 ng/mL, between 20 ng/mL and 30 ng/mL, n 30 ng/mL and 40 ng/mL, between 40 ng/mL and 50 ng/mL, and between 50 ng/mL and 100 ng/mL of OKT3 antibody.

In some embodiments, an D3 antibody in combination with IL—2 induces T cell activation and cell division in the TIL population. This effect can be seen with full length antibodies as well as Fab and F(ab’)2 fragments, with the former being generally preferred; see, e.g., Tsoukas et 61]., J. Immunol. 1985, 135, 1719, hereby incorporated by reference in its entirety. As will be appreciated by those in the art, there are a number of le anti-human CD3 antibodies that find use in the invention, including uman CD3 polyclonal and monoclonal antibodies from various mammals, including, but not limited to, murine, human, primate, rat, and canine antibodies. In particular embodiments, the OKT3 anti-CD3 antibody is used (commercially available from Ortho-McNeil, Raritan, NJ or Miltenyi Biotech, Auburn, CA).

In some embodiment, the cells in the second expansion are grown in a e media with high doses of a cytokine, in particular lL-Z, as is known in the art.

Alternatively, using combinations of cytokines for the second expansion of TILS is additionally possible, with combinations of two or more of IL—2, TL-lS and 11—21 as is generally outlined in International Publication No. WC 2015/ l 893 56 and International Publication No. entirety. Thus, possible combinations include IL—2 and IL—15, IL—2 and IL—21, IL—15 and IL- 21 and IL-2, IL-lS and IL-21, with the latter finding particular use in many embodiments.

The use of combinations of cytokines specifically favors the generation of cytes, and in particular T—cells as described therein.

E. Optional Repeats of Step D: Second Expansion In some embodiments, the second ion is med one or more times, 1.6., the second expansion is repeated. For example, in some ments the Step D second expansion as indicated in Figure 11 is repeated one or more times. In some embodiments, the second expansion is ed to as an additional second expansion. In some embodiments where the second expansion is performed more than once (i.e., where the second ion is repeated), this can include procedures referred to as a TIL Rapid Expansion Protocol. In some embodiments, the TIL cell population is expanded in number after harvest and first expansion. This process is generally referred to in the art as a rapid expansion process (REP) and the repeated second expansion can include expansion referred to as reREP. This overall protocol can be generally lished using culture media comprising a number of components, including feeder cells, a cytokine source, and an anti-CD3 antibody, in a gas- permeable container. In some ments, one or more subsequent second expansion(s) are performed as described above. In some embodiments, one or more subsequent second expansions are performed as provided in under Step D in Figure 11 and prior to Step E as provide in Figure 11. In some embodiments, one, two, three, four or more second expansions are performed as described above. In some ments, one, two, three, four or more second expansions are performed as provided in Step D of Figure ll before Step E of Figure 11. In some embodiments, two second expansions are performed as described above. In some embodiments, two second expansions are performed as provided in Step D of Figure 11 before Step E of Figure 11. In some embodiments, three second expansions are performed as described above. In some embodiments, three second expansions are performed as provided in Step D of Figure 11 before Step E of Figure 11. In some embodiments, four second expansions are performed as described above. In some embodiments, four second expansions are med as provided in Step D of Figure 11 before Step E of Figure 11.

In some embodiments, the repeat of the second expansion of the TILS (such as for example in Step D of Figure 11) can be referred to as a ulation of TILs. In some embodiments, the present invention includes a restimulation step, i.e., a repeat of the second expansion (for e, a repeat of the second expansion from Step D of Figure 11). In some embodiments, the repeated second expansion (which can e an expansion referred to as a restimulation step (“reRE ”)) is performed on cells that have been cryopreserved. In some ments, the TILS are eserved after Step D. In some embodiments, after an initial second expansion in Step D,, the cells may be cultured in r media, e.g. a “resting” media, and then one or more second expansions steps are performed. In some embodiments, the resting media comprises IL—2. In some embodiments, the resting media does not comprise IL-2. In some embodiments, the resting media is a standard cell culture media known in the art. In some embodiments, the resting media is AHVI—V, DMEM, DMEM/F 12, MEM, RPMI, OptilVIEM, , or any other standard media that is known in art, including cially ble media. In some embodiments, the resting media is AIM-V.

In general, as discussed herein, the TILs are initially prepared by obtaining a primary population of TILs from a tumor resected from a patient as discussed herein (the “primary cell population” or “first cell population”). This is followed with an initial bulk expansion utilizing a culturing of the cells with IL-2, g a second population of cells (sometimes referred to herein as the “bulk TIL population” or “second population”). In some embodiments, this is also referred to as the initial or first ion.

The bulk TIL population (for e, the population obtained from for example Step A in Figure 11) is then subjected to a REP step, sometimes referred to as a first expansion (for example, the first expansion as described in Step B of Figure 11) in a cell culture media comprising IL-2, OKT-3, and antigen presenting feeder cells (APCs), wherein the APCs generally comprise peripheral blood mononuclear cells (PBMCs, or, alternatively as sed herein, using antigen presenting cells), wherein the rapid expansion (for example, the second expansion as provide in Step D of Figure 11) is performed for at least 14 days. As discussed herein, the media may also contain combinations of IL-2, IL-15 and/or IL- 23 rather than IL-2 alone. In some embodiments, this post second ion (for example, post Step D of Figure ll) expanded TIL population is at least 50 —fold or lOO-fold greater in number than the second population of TILs (for example, the population of TILs obtained from Step B of Figure 11). In some embodiments, the population of TILs ed after the second ion in Step D of Figure ll are 50-fold or lOO-fold greater in number than the TILs obtained from the first expansion in Step B of Figure 11. TILs are measured by cell ng methods known in the art, including those methods described in the Examples provided herewith, including Examples 1, 2, and 3. In some embodiments, a K2 cell counter is employed to count the TILs. In some embodiments, a Cellometer 1C2 Image cytometer is employed to count the TILs.

In some embodiments, as discussed herein, the TIL population obtained after the second expansion (sometimes referred to as a third TIL population or a REP cell population) is removed from the supplemented cell culture media (for example, the culture media used in Step D of Figure 11 or the media referred to as CM2 in the Examples) and optionally cryopreserved in a storage media (for e, media containing 5% DMSO) prior to performing and additional second expansion step.

Optionally, the TILs can be cryopreserved after a second ion and before an onal second expansion. In some embodiments, the TILs are cryopreserved after ming Step D of Figure 11 and before performing an additional Step D of Figure 11. In some embodiments, the eserved TILs are thawed prior to performing the additional second expansion. In some embodiments, the cryopreserved TILs are thawed prior to performing the additional Step D as provided in Figure 11. In some embodiments, the TILs are cryopreserved in 5% DMSO. In some embodiments, the TILs are cryopreserved in cell culture media plus 5% DMSO. Alternatively, the cells are removed from the mented cell culture media (for example, the culture media used in Step D of Figure 11) and cultured in a resting media. Such media include those that are bed in Examples 1 and 5, as well as the other Examples provided herewith. In some embodiments, resting media can include media with IL—2. In some embodiments, the g media can be the media referred to as CMl in the examples.

The additional second expansion (including expansions referred to as reREP) is done on either the thawed cells or resting cells, using a supplemented cell culture medium (for example, a medium as provide in Step D of Figure 11) comprising IL-2, OKT-3, and feeder cells (for example, n presenting cells), generally comprising peripheral blood mononuclear cells (PBMCs; or, alternatively as discussed herein, using antigen ting cells), wherein the additional second expansion is performed for at least 14 days. As discussed herein, the media may also contain combinations of IL-2, IL-15 and/or IL-23 rather than IL-2 alone.

This results in an expanded population of TILs that are characterized in that these expanded TILs exhibits an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs (e.g., the bulk starting TILS). In some embodiments, these expanded TILs are the TILs ed from Step D of Figure 11.

In some embodiments the memory T cells are those cells that constitutively CCR7 and CD62L. See, to, el 51]., Annu. Rev. l, 2004, 22:745-763, incorporated by nce herein in its entirety.

Thus, the t invention provides methods for the restimulation of cryopreserved TILs upon thawing, based on post-thaw methods that result in increases of metabolic health such as glycolysis and respiration. In some embodiments, method comprises providing a population of thawed cryopreserved TILs that are then treated to increase their metabolic health to allow for optimal treatment upon infusion into patients.

F. STEP E: Harvest TILS from Step D ] After the second expansion step, cells can be harvested. In some embodiments the TILs are harvested after one, two, three, four or more second expansion steps. In some embodiments, the TILs are ted after one, two, three, four or more second expansion steps ing to Step D as provided in Figure ll.

TILs can be ted in any appropriate and sterile manner, ing for example by centrifugation. Methods for TIL harvesting are well known in the art and any such know methods can be employed with the present process.

G. STEP F: Final Formulation and/or Transfer to Infusion Bag After Steps A through E as provided in an exemplary order in Figure 11 and as outlined in detailed above and herein are complete, cells are transferred to a container for use in administration to a patient. In some embodiments, once a therapeutically sufficient number WO 81473 of TILs are obtained using the expansion methods bed above, they are transferred to a container for use in administration to a patient.

In an embodiment, TILs ed using APCs of the present disclosure are administered to a patient as a ceutical composition. In an embodiment, the pharmaceutical composition is a suspension of TILs in a sterile buffer. TILs expanded using PBMCs of the present disclosure may be administered by any suitable route as known in the art. In some embodiments, the T-cells are administered as a single intra-arterial or enous infusion, which preferably lasts approximately 30 to 60 minutes. Other suitable routes of administration include intraperitoneal, intrathecal, and intralymphatic. 1. Pharmaceutical Compositions, Dosages, and Dosing Regimens In an embodiment, TlLs ed using APCs of the present disclosure are administered to a patient as a pharmaceutical composition. In an embodiment, the pharmaceutical composition is a suspension of TILs in a sterile buffer. TILs expanded using PBMCs of the t disclosure may be stered by any suitable route as known in the art. In some embodiments, the T-cells are administered as a single intra-arterial or intravenous infusion, which preferably lasts approximately 30 to 60 minutes. Other suitable routes of administration include intrapelitoneal, intrathecal, and intralymphatic administration.

Any le dose of TILs can be administered. In some embodiments, a therapeutically ient number of TILs are needed for a suitable dosage. In some embodiments, from about 2.3 X 1010 to about 13.7X1010 TILs are administered, with an average of around 7.8X1010 TILs, particularly if the cancer is melanoma. In an embodiment, about 1.2X 1010 to about 4.3X 1010 of TILs are administered. In some embodiments, about 3X 1010 to about 12X1010 TILs are administered. In some embodiments, about 4X 1010 to about 10X 1010 TILs are administered. In some embodiments, about 5X 1010 to about 8X 1010 TILs are administered. In some embodiments, about 6X 1010 to about 8X1010 TILs are administered. In some embodiments, about 7X 1010 to about 8X1010 TILs are stered. In some embodiments, the therapeutically effective dosage is about 2.3 X 1010 to about l3.7X1010. In some embodiments, the therapeutically effective dosage is about 7 .8X 1010 TILs, particularly of the cancer is melanoma. In some embodiments, the eutically effective dosage is about 1.2X 1010 to about 4.3X1010 of TILs. In some embodiments, the therapeutically effective dosage is about 3 X 1010 to about 12X 1010 TILs. In some embodiments, the therapeutically effective dosage is about 4X 1010 to about 10X 1010 TILs. In some embodiments, the therapeutically effective dosage is about 5X 1010 to about 8X1010 TILs. In some embodiments, the eutically effective dosage is about 6>< 1010 to about 8X1010 TILs. In some embodiments, the therapeutically effective dosage is about 7X 1010 to about 8X1010 TILs.

In some embodiments, the number of the TILs provided in the pharmaceutical compositions ofthe invention is about 1X106, 2X106, 38106, 4><106, 5X106, 6X106, , 8><106,9X106,1><107,2X107,3X107,4X107,5><107,6X107,7X107,8X107,9><107,1X108,2X108, 3x108,4x108,5x108,6x108,7x108,8x103,9x108,1x109,2x109,3x109,4x109,5x109,6x109, 7X109,8X109,9X109,1><101°,2><1010,3X1010,4X1010,5X1010,6X1010,7X1010,8X1010,9X1010, 1x1011,2x1011,3x1011,4x1011,5x1011,6x1011,7x1011,8x1011,9x1011,1x1012,2x1012, 3x1012,4x1012,5x1012,6x1012,7x1012,8x1012,9x1012,1x1013,2x1013,3x1013,4x1013, 5X1013,6X1013, 7X 10”, 8X10”, and 9X10”. In an embodiment, the number ofthe TILs provided in the pharmaceutical compositions of the invention is in the range of 1><106 to 5x106, 5x106 to 1x107, 1x107 to 5x107, 5x107 to 1x108, 1x108 to 5x108, 5x108 to 1x109, 1x109 to 5x109, 5x109 to 1x10“), 1x1010 to 5X10“),5><1010to1X1011,5X1011t01X1012, 1X1012 to 5X10”, and 5X1012 to 1X10”. In some embodiments, the therapeutically effective dosage is about 1x106, 2x106, 3x106, 4x106, 5x106, 6X106, 7x106, 8x106, 9x106, 1x107, 2X107,3><107,4><107,5X107,6X107,7><107,8><107,9X107,1X108,2><108,3><103,4X108,5X108, 6X108,7X108,8X108,9X108,1X109,2X109,3X109,4X109,5X109,6X109,7X109,8X109,9X109, 1X1010,2X1010,3X1010,4X1010,5X1010,6X1010,7X1010,8X1010,9><1010,1X10“,2X10“, 3x1011,4x1011,5x1011,6x1011,7x1011,8x1011,9x1011, 1x1012,2x1012,3x1012,4x1012, 5X1012,6><1012,7><1012,8X1012,9X1012,1X1013,2X1013,3X1013,4X1013,5X1013,6X1013, 7><1013,8X1013,and 9x10”.

In some embodiments, the concentration of the TILs ed in the pharmaceutical compositions of the invention is less than, for example, 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, %, 4%, 3%, 2%, 1%, 0.5%, 0.4%, 0.3%, 0.2%, 0.1%, 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01%, 0.009%, 0.008%, 0.007%, 0.006%, 0.005%, 0.004%, 0.003%, 0.002%, 0.001%, %, 0.0008%, 0.0007%, %, 0.0005%, 0.0004%, 0.0003%, 0,0002% or 0,0001% w/W, W/v or v/v of the pharmaceutical composition.

In some embodiments, the concentration of the TILs provided in the pharmaceutical compositions of the invention is r than 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 19.75%, 19.50%, 19.25% 19%, 18.75%, , 18.25% 18%, 17.75%, 17.50%, 17.25% 17%, 16.75%, , 16.25% 16%, 15.75%, 15.50%, 15.25% 15%, 14.75%, 14.50%, 14.25% 14%, 13.75%, 13.50%, 13.25% 13%, 12.75%, 12.50%, 12.25% 12%, 11.75%, 11.50%, 11.25% 11%, 10.75%, 10.50%, 10.25% 10%, 9.75%, 9.50%, 9.25% 9%, 8.75%, 8.50%, 8.25% 8%, 7.75%, 7.50%, 7.25% 7%, 6.75%, 6.50%, 6.25% 6%, 5,75%, 5.50%, .25% 5%, 4.75%, 4.50%, 4.25%, 4%, 3.75%, 3.50%, 3.25%, 3%, 2.75%, 2.50%, 2.25%, 2%, 1.75%, 1.50%, 125%, 1%, 0.5%, 0.4%, 0.3%, 0.2%, 0.1%, 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01%, , 0.008%, 0.007%, 0.006%, 0.005%, 0.004%, , 0.002%, 0.001%, 0.0009%, 0.0008%, 0.0007%, 0.0006%, 0.0005%, %, 0.0003%, 0.0002% or 0.0001% w/w, w/v, or v/v of the pharmaceutical composition.

In some ments, the concentration of the TILs ed in the pharmaceutical compositions of the invention is in the range from about 0.0001% to about 50%, about 0.001% to about 40%, about 0.01% to about 30%, about 0.02% to about 29%, about 0.03% to about 28%, about 0.04% to about 27%, about 0.05% to about 26%, about 0.06% to about %, about 0.07% to about 24%, about 0.08% to about 23%, about 0.09% to about 22%, about 0.1% to about 21%, about 0.2% to about 20%, about 0.3% to about 19%, about 0.4% to about 18%, about 0.5% to about 17%, about 0.6% to about 16%, about 0.7% to about 15%, about 0.8% to about 14%, about 0.9% to about 12% or about 1% to about 10% W/w, w/v or v/v of the pharmaceutical composition.

In some embodiments, the concentration of the TILs provided in the pharmaceutical compositions of the invention is in the range from about 0.001% to about 10%, about 0.01% to about 5%, about 0.02% to about 4.5%, about 0.03% to about 4%, about 0.04% to about 3.5%, about 0.05% to about 3%, about 0.06% to about 2.5%, about 0.07% to about 2%, about 0.08% to about 1.5%, about 0.09% to about 1%, about 0.1% to about 0.9% W/W, W/v or v/v of the pharmaceutical composition.

In some embodiments, the amount of the TILs provided in the pharmaceutical compositions ofthe invention is equal to or less than 10 g, 9.5 g, 9.0 g, 8.5 g, 8.0 g, 7.5 g, 7.0 g, 6.5 g, 6.0 g, 5.5 g, 5.0 g, 4.5 g, 4.0 g, 3.5 g, 3.0 g, 2.5 g, 2.0 g, 1.5 g, 1.0 g, 0.95 g, 0.9 g, 0.85 g, 08 g, 0.75 g, 0.7 g, 0.65 g, 0.6 g, 0.55 g, 0.5 g, 0.45 g, 04 g, 0.35 g, 0.3 g, 0.25 g, 0.2 g, 0.15 g, 0.1 g, 0.09 g, 0.08 g, 0.07 g, 0.06 g, 0.05 g, 0.04 g, 0.03 g, 0.02 g, 0.01 g, 0.009 g, 0.008 g, 0.007 g, 0.006 g, 0.005 g, 0.004 g, 0.003 g, 0.002 g, 0.001 g, 0.0009 g, 0.0008 g, 0.0007 g, 0.0006 g, 0.0005 g, 0.0004 g, 0.0003 g, 0.0002 g, or 0.0001 g.

In some embodiments, the amount of the TILs provided in the pharmaceutical compositions of the invention is more than 0.0001 g, 0.0002 g, 0.0003 g, 0.0004 g, 0.0005 g, 0.0006 g, 0.0007 g, 0.0008 g, 0.0009 g, 0.001 g, 0.0015 g, 0.002 g, 0.0025 g, 0,003 g, 0.0035 g, 0.004 g, 0.0045 g, 0.005 g, 0.0055 g, 0.006 g, 0.0065 g, 0.007 g, 0.0075 g, 0.008 g, 0.0085 g, 0.009 g, 0.0095 g, 0.01 g, 0.015 g, 0.02 g, 0.025 g, 0.03 g, 0.035 g, 0.04 g, 0.045 g, 0.05 g, 0.055 g, 0.06 g, 0.065 g, 0.07 g, 0,075 g, 0.08 g, 0.085 g, 0.09 g, 0.095 g, 0.1 g, 0.15 g, 02 g, 0.25 g, 0.3 g, 0.35 g, 0.4 g, 0.45 g, 0.5 g, 0.55 g, 0.6 g, 0.65 g, 0.7 g, 0.75 g, 0.8 g, 0.85 g, 0.9 g, 0.95 g, lg, 1.5 g, 2 g, 2.5, 3 g, 3.5, 4 g, 4.5 g, 5 g, 5.5 g, 6 g, 6.5 g, 7 g, 7.5 g, 8 g, 8.5 g, 9 g, 9.5 g, or 10 g.

The TILs provided in the pharmaceutical compositions of the invention are effective over a wide dosage range. The exact dosage will depend upon the route of administration, the form in which the compound is administered, the gender and age of the subject to be treated, the body weight of the subject to be treated, and the ence and experience of the attending physician. The clinically-established dosages of the TILs may also be used if appropriate. The amounts of the pharmaceutical compositions stered using the methods herein, such as the dosages of TILs, will be dependent on the human or mammal being treated, the severity of the disorder or ion, the rate of administration, the disposition of the active pharmaceutical ingredients and the tion of the ibing physician.

In some embodiments, TILs may be administered in a single dose. Such administration may be by injection, e.g, intravenous ion. In some embodiments, TILs may be administered in multiple doses. Dosing may be once, twice, three times, four times, five times, six times, or more than six times per year. Dosing may be once a month, once every two weeks, once a week, or once every other day. Administration of TILs may continue as long as necessary.

In some embodiments, an effective dosage of TILs is about 1X106, 2><106, 3X106, 4X106,5X106,6X106,7><106,8X106,9X106,1X107,2><107,3X107,4X107,5X107,6><107,7X107, 8x107,9x107,1x108,2x108,3x108,4x108,5x108,6><108,7x108,8x108,9x108,1x109,2x109, 3x109,4x109,5x109,6x109,7x109,8x109,9x109,1x101°,2x1010,3x1010,4x1010,5x1010, 6X1010,7X1010, 8X1010,9X1010, 1x1011,2x1011,3x1011,4x1011, 5x1011,6x1011,7x1011, 8x1011,9x1011, 1x1012,2x1012,3x1012,4x1012,5x1012,6x1012,7x1011,8x1012,9x1012, 1x1013,2x1013,3x1013,4x1013, 5x1013,6x1013,7x1013, 8><1013,and 9x1013.1n some embodiments, an effective dosage of TILs is in the range of 1X106 to 5X106, 5>< 106 to 1X107, 1x107 to 5x107, 5x107 to 1x108, 1x108 to 5x108, 5x108 to 1x109, 1x109 to 5x109, 5x109 to 1x1010,1x1010to 5x10“), 5x1010 to 1x10“, 5x1011 to 1x10”, 1x1012 to 5x10”, and 5x1012 to 1x10”.

In some embodiments, an ive dosage of TILs is in the range of about 0.01 mg/kg to about 4.3 mg/kg, about 0.15 mg/kg to about 3.6 mg/kg, about 0.3 mg/kg to about 3.2 mg/kg, about 0.35 mg/kg to about 2.85 mg/kg, about 0.15 mg/kg to about 2.85 mg/kg, about 0.3 mg to about 2.15 mg/kg, about 0.45 mg/kg to about 1.7 mg/kg, about 0.15 mg/kg to about 1.3 mg/kg, about 0.3 mg/kg to about 1.15 mg/kg, about 0.45 mg/kg to about 1 mg/kg, about 0.55 mg/kg to about 0.85 mg/kg, about 0.65 mg/kg to about 0.8 mg/kg, about 0.7 mg/kg to about 0.75 mg/kg, about 0.7 mg/kg to about 2.15 mg/kg, about 0.85 mg/kg to about 2 mg/kg, about 1 mg/kg to about 1.85 mg/kg, about 1.15 mg/kg to about 1.7 mg/kg, about 1.3 mg/kg mg to about 1.6 mg/kg, about 1.35 mg/kg to about 1.5 mg/kg, about 2.15 mg/kg to about 3.6 mg/kg, about 2.3 mg/kg to about 3.4 mg/kg, about 2.4 mg/kg to about 3.3 mg/kg, about 2.6 mg/kg to about 3.15 mg/kg, about 2.7 mg/kg to about 3 mg/kg, about 2.8 mg/kg to about 3 mg/kg, or about 2.85 mg/kg to about 2.95 mg/kg.

In some embodiments, an effective dosage of TILs is in the range of about 1 mg to about 500 mg, about 10 mg to about 300 mg, about 20 mg to about 250 mg, about 25 mg to about 200 mg, about 1 mg to about 50 mg, about 5 mg to about 45 mg, about 10 mg to about 40 mg, about 15 mg to about 35 mg, about 20 mg to about 30 mg, about 23 mg to about 28 mg, about 50 mg to about 150 mg, about 60 mg to about 140 mg, about 70 mg to about 130 mg, about 80 mg to about 120 mg, about 90 mg to about 110 mg, or about 95 mg to about 105 mg, about 98 mg to about 102 mg, about 150 mg to about 250 mg, about 160 mg to about 240 mg, about 170 mg to about 230 mg, about 180 mg to about 220 mg, about 190 mg to about 210 mg, about 195 mg to about 205 mg, or about 198 to about 207 mg.

An effective amount of the TILs may be administered in either single or multiple doses by any of the accepted modes of administration of agents having similar utilities, including intranasal and ermal routes, by intra-arterial injection, enously, intraperitoneally, parenterally, intramuscularly, subcutaneously, topically, by transplantation, or by inhalation.

H. al Cell Viability Analyses Optionally, a cell viability assay can be performed after the Step B first expansion, using standard assays known in the art. For example, a trypan blue exclusion assay can be done on a sample of the bulk TILs, which selectively labels dead cells and allows a viability assessment. Other assays for use in testing viability can include but are not limited to the Alamar blue assay, and the MTT assay. 1. Cell Counts, ity, Flow Cytometry In some ments, cell counts and/or viability are ed. The expression of markers such as but not limited CD3, CD4, CD8, and CD56, as well as any other disclosed or described herein, can be measured by flow cytometry with antibodies, for example but not limited to those commercially available from BD Bio-sciences (BD Biosciences, San Jose, CA) using a FACSCantoTM flow cytometer (BD Biosciences). The cells can be counted manually using a able c-chip hemocytometer (VWR, a, IL) and viability can be assessed using any method known in the art, including but not limited to trypan blue staining.

In some cases, the bulk TIL population can be cryopreserved immediately, using the protocols discussed below. Alternatively, the bulk TIL tion can be subjected to REP and then cryopreserved as discussed below. Similarly, in the case where genetically modified TILs will be used in therapy, the bulk or REP TIL populations can be subjected to c modifications for suitable treatments. 2, Cell Cultures In an embodiment, a method for expanding TILs may include using about 5,000 mL to about 25,000 mL of cell medium, about 5,000 mL to about 10,000 mL of cell medium, or about 5,800 mL to about 8,700 mL of cell medium, In an embodiment, expanding the number of TILs uses no more than one type of cell culture medium. Any suitable cell culture medium may be used, e. g., AIM-V cell medium (L-glutamine, 50 uM streptomycin sulfate, and 10 [1M gentamicin sulfate) cell e medium (Invitrogen, Carlsbad CA), In this regard, the ive methods advantageously reduce the amount of medium and the number of types of medium ed to expand the number of TIL. In an embodiment, ing the number of TIL may comprise adding fresh cell culture media to the cells (also referred to as feeding the cells) no more frequently than every third or fourth day. Expanding the number of cells in a gas permeable container simplifies the procedures necessary to expand the number of cells by reducing the feeding frequency necessary to expand the cells.

In an embodiment, the cell medium in the first and/or second gas permeable container is unfiltered. The use of unfiltered cell medium may simplify the procedures necessary to expand the number of cells. In an embodiment, the cell medium in the first and/or second gas permeable container lacks beta-mercaptoethanol (BME).

In an embodiment, the duration of the method comprising obtaining a tumor tissue sample from the mammal; ing the tumor tissue sample in a first gas permeable container containing cell medium therein; obtaining TILs from the tumor tissue sample; expanding the number of TILs in a second gas permeable container containing cell medium therein using aAPCs for a duration of about 14 to about 42 days, e.g, about 28 days.

In an embodiment, TILs are expanded in gas-permeable containers. Gas-permeable containers have been used to expand TILs using PBMCs using methods, compositions, and devices known in the art, including those described in US. Patent Application Publication No. 2005/0106717 Al, the disclosures of which are incorporated herein by reference. In an embodiment, TILs are expanded in rmeable bags. In an embodiment, TILs are expanded using a cell expansion system that s TILs in gas permeable bags, such as the Xuri Cell Expansion System W25 (GE Healthcare). In an embodiment, TILs are expanded using a cell ion system that expands TILs in gas permeable bags, such as the WAVE Bioreactor System, also known as the Xuri Cell Expansion System W5 (GE Healthcare). In an embodiment, the cell expansion system includes a gas permeable cell bag with a volume selected from the group consisting of about 100 mL, about 200 mL, about 300 mL, about 400 mL, about 500 mL, about 600 mL, about 700 mL, about 800 mL, about 900 mL, about 1 L, about 2 L, about 3 L, about 4 L, about 5 L, about 6 L, about 7 L, about 8 L, about 9 L, and about 10 L. In an embodiment, TILs can be ed in G—Rex flasks (commercially available from Wilson Wolf Manufacturing). Such embodiments allow for cell populations to expand from about 5x105 cells/cm2 to between 10x106 and 30x106 cells/cmz. In an embodiment this expansion is ted without adding fresh cell culture media to the cells (also referred to as feeding the cells). In an embodiment, this is without feeding so long as medium resides at a height of about 10 cm in the GRex flask. In an embodiment this is without feeding but with the addition of one or more cytokines. In an embodiment, the cytokine can be added as a bolus without any need to mix the cytokine with the medium.

Such containers, devices, and methods are known in the art and have been used to expand TILs, and include those described in US. Patent Application Publication No. US 2014/0377739Al, ational Publication No.

Application ation No. us 115617 A1, International ation No. WO 2013/188427 Al, U. S. Patent Application ation No. US 2011/0136228 A1, U. S. Patent No. US 8,809,050 B2, International publication No.

Application Publication No. US 2016/0208216 A1, US. Patent Application Publication No.

US 2012/0244133 A1, International Publication No.

Application ation No. US 2013/0102075 A1, US. Patent No. US 8,956,860 B2, ational Publication No.

US 2015/0175966 Al, the disclosures of which are incorporated herein by reference. Such processes are also described in Jin er al., J. Immunotherapy, 2012, -292. Optional Genetic Engineering of TILs In some embodiments, the TILs are ally genetically engineered to include additional functionalities, including, but not limited to, a ffinity T cell receptor (TCR), e.g., a TCR targeted at a tumor-associated n such as MAGE-l, HER2, or NY-ESO-l, or a chimeric antigen receptor (CAR) which binds to a associated cell surface molecule (e.g., mesothelin) or lineage—restricted cell surface molecule (e.g., CD19).

I. Optional Cryopreservation of TILs As discussed above in Steps A through E, cryopreservation can occur at numerous points throughout the TIL expansion process. In some ments, the bulk TIL population after the first expansion according to Step B or the expanded population of TILs after the one or more second expansions according to Step D can be eserved. Cryopreservation can be generally accomplished by placing the TIL population into a freezing solution, e.g., 85% complement inactivated AB serum and 15% dimethyl sulfoxide (DMSO). The cells in solution are placed into cryogenic vials and stored for 24 hours at -80 CC, with optional transfer to gaseous nitrogen freezers for cryopreservation. See, Sadeghi, er al., Acta Oncologica 2013, 52, 978-986. In some embodiments, the TILs are cryopreserved in 5% DMSO. In some embodiments, the TILs are cryopreserved in cell culture media plus 5% DMSO. In some embodiments, the TILs are cryopreserved according to the methods provided in Examples 8 and 9.

] When appropriate, the cells are removed from the freezer and thawed in a 37 °C water bath until imately 4/5 of the solution is thawed. The cells are generally resuspended in complete media and optionally washed one or more times. In some ments, the thawed TILs can be counted and assessed for viability as is known in the J. Phenotypic Characteristics of Expanded TILs ] In some embodiment, the TILs are analyzed for expression of numerous phenotype s after expansion, including those described herein and in the Examples. In an embodiment, expression of one or more phenotypic markers is examined. In some embodiments, the phenotypic characteristics of the TILs are analyzed after the first expansion in Step B. In some embodiments, the phenotypic characteristics of the TILs are analyzed during the transition in Step C. In some embodiments, the phenotypic characteristics of the TILs are analyzed during the transition according to Step C and after cryopreservation. In some ments, the phenotypic characteristics of the TILs are analyzed after the second expansion according to Step D, In some embodiments, the phenotypic characteristics of the TILs are analyzed after two or more expansions according to Step D. In some embodiments, the marker is ed from the group ting of TCRab, CD57, CD28, CD4, CD27 CD56, CD8a, CD45RA, CD8a, CCR7, CD4, CD3, CD38, and HLA-DR. In some embodiments, the marker is selected from the group consisting of TCRab, CD57, CD28, CD4, CD27, CD56, and CD8a. In an embodiment, the marker is selected from the group consisting of CD45RA, CD8a, CCR7, CD4, CD3, CD3 8, and HLA-DR. In some embodiments, expression of one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, or fourteen markers is examined. In some embodiments, the expression from one or more markers from each group is examined. In some embodiments, one or more of HLA-DR, CD3 8, and CD69 sion is maintained (i.e., does not exhibit a statistically cant difference) in fresh TILs as compared to thawed TILs. In some embodiments, the activation status of TILs is maintained in the thawed TILs.

In an embodiment, expression of one or more regulatory markers is measured. In some embodiments, the regulatory marker is selected from the group consisting of CD137, CD8a, Lag3, CD4, CD3,PD1, TIM-3, CD69, CD8a, TIGIT, CD4, CD3,KLRG1, and CD154. In some embodiments, the tory marker is selected from the group consisting of CD137, CD8a, Lag3, CD4, CD3, PD], and THVI-3. In some embodiments, the tory marker is selected from the group consisting of CD69, CD8a, TIGIT, CD4, CD3, KLRGl, and CD154. In some embodiments, regulatory le expression is decreased in thawed TILs as compared to fresh TILs. In some embodiments, sion of regulatory molecules LAG-3 and TIM-3 is decreased in thawed TILs as compared to fresh TILs. In some ments, there is no significant difference in CD4, CD8, NK, TCRdB expression. In some embodiments, there is no significant difference in CD4, CD8, NK, TCROLB expression, and/or memory markers in fresh TILs as compared to thawed TILs.

In some embodiments the memory marker is ed from the group consisting of CCR7 and CD62L In some embodiments, the viability of the fresh TILs as compared to the thawed TILs is at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or at least 98%. In some embodiments, the viability of both the fresh and thawed TILs is r than 70%, r than 75%, greater than 80%, greater than 85%, greater than 90%, greater than 95%, or greater than 98%. In some embodiments, the viability of both the fresh and thawed product is r than 80%, greater than 81%, greater than 82%, greater than 83%, greater than 84%, greater than 85%, greater than 86%, greater than 87%, greater than 88%, greater than 89%, or greater than 90%. In some embodiments, the viability of both the fresh and thawed product is greater than 86%.

] In an embodiment, restimulated TILs can also be evaluated for cytokine release, using cytokine release . In some embodiments, TILs can be evaluated for eron-7 (LEN-7) secretion in response to stimulation either with OKT3 or co—culture with autologous tumor digest. For example, in embodiments employing OKT3 stimulation, TILs are washed extensively, and duplicate wells are prepared with 1 x 105 cells in 0.2 mL CM in 96-well flat- bottom plates precoated with 0.1 or 1.0 ug/mL of OKT3 d in phosphate-buffered saline.

After overnight incubation, the supernatants are harvested and [EN—7 in the supernatant is measured by ELISA (Pierce/Endogen, Woburn, MA). For the co-culture assay, 1 x 105 TIL cells are placed into a 96-well plate with autologous tumor cells. (1 :1 ratio). After a 24-hour incubation, atants are harvested and [EN-7 release can be quantified, for example by ELISA.

Flow cytometric analysis of cell surface biomarkers: TIL samples were aliquoted for flow cytometric is of cell surface markers see, for Example see Examples 7, 8, and 9.

In some embodiments, the TILs are being evaluated for s regulatory markers.

In some embodiments, the regulatory marker is selected from the group consisting of TCR U/B, CD56, CD27, CD28, CD57, CD45RA, CD45RO, CD25, CD127, CD95, IL-2R—, CCR7, CD62L, KLRGl, and CD122. In some embodiments, the regulatory marker is TCR OL/B. In some embodiments, the regulatory marker is CD56. In some embodiments, the regulatory marker is CD27. In some embodiments, the regulatory marker is CD28. In some embodiments, the tory marker is CD57. In some embodiments, the regulatory marker is CD45RA. In some embodiments, the regulatory marker is CD45RO. In some embodiments, the regulatory marker is CD25. In some embodiments, the tory marker is CD127. In some embodiments, the tory marker is CD95. In some embodiments, the regulatory marker is . In some embodiments, the regulatory marker is CCR7. In some embodiments, the tory marker is CD62L. In some embodiments, the regulatory marker is KLRGl. In some embodiments, the regulatory marker is CD122.

K. lic Health of Expanded TILs The restimulated TILs are characterized by significant enhancement of basal glycolysis as compared to either freshly harvested TILs and/or post-thawed TILs.

Spare respiratory capacity (SRC) and glycolytic reserve can be evaluated for TILs expanded with aEM3 aAPCs in comparison to PBMC feeders. The Seahorse XF Cell Mito Stress Test measures mitochondrial function by directly measuring the oxygen consumption rate (OCR) of cells, using modulators of respiration that target components of the electron transport chain in the mitochondria. The test compounds (oligomycin, FCCP, and a mix of rotenone and antimycin A, described below) are serially injected to measure ATP production, maximal respiration, and non-mitochondrial respiration, respectively. Proton leak and spare respiratory capacity are then calculated using these parameters and basal respiration. Each modulator targets a specific component of the electron transport chain. Oligomycin inhibits ATP synthase (complex V) and the decrease in OCR following injection of oligomycin correlates to the mitochondrial respiration associated with cellular ATP production. Carbonyl cyanide—4 (trifluoromethoxy) hydrazone (FCCP) is an uncoupling agent that collapses the proton nt and disrupts the mitochondrial membrane potential. As a result, electron flow through the electron transport chain is uninhibited and oxygen is maximally ed by complex IV. The FCCP—stimulated OCR can then be used to calculate spare respiratory capacity, defined as the difference between maximal respiration and basal respiration. Spare respiratory capacity (SRC) is a e of the ability of the cell to respond to increased energy demand. The third ion is a mix of rotenone, a complex I inhibitor, and antimycin A, a complex III inhibitor. This combination shuts down mitochondrial respiration and s the calculation of nonmitochondrial respiration driven by ses outside the ondria.

In some embodiments, the metabolic assay is basal respiration. In general, second expansion TILs or second onal expansion TILs (such as, for e, those described in Step D of Figure 11, including TILs referred to as reREP TILs) have a basal respiration rate that is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly ted TILs. In some embodiments, the basal respiration rate is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 60% to about 99% of the basal respiration rate of freshly harvested TILs. In some ments, the basal respiration rate is from about 70% to about 99% of the basal ation rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 80% to about 99% of the basal respiration rate of y harvested TILs. In some embodiments, the basal respiration rate is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the basal respiration rate is from about 95% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the second expansion or second additional expansion TILs (such as, for example, those described in Step D of Figure ll, including TILs referred to as reREP TILs) have a basal ation rate that is not statistically significantly different than the basal respiration rate of freshly harvested TILs.

In general, second expansion TILs or additional second expansion TILs, such as those in Step D (including, for example, TILs referred to as reREP which have undergone an additional second expansion) TILs have a spare respiratory capacity that is at least is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from about 50% to about 99% of the basal respiration rate of freshly ted TILs. In some embodiments, the spare respiratory capacity is from about 60% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory ty is from about 70% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare respiratory capacity is from ab out 80% to about 99% of the basal ation rate of freshly ted TILs. In some embodiments, the spare respiratory capacity is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the spare atory capacity is from about 95% to about 99% of the basal respiration rate of freshly harvested TlLs. In some embodiments, the second expansion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure ll, including TILs referred to as reREP TILs) have a spare respiratory capacity that is not statistically significantly different than the basal respiration rate of y harvested TlLs.

In general, the second expansion TlLs or second additional expansion TlLs (such as, for e, those described in Step D of Figure 11, including TILs referred to as reREP TILs) have a spare respiratory capacity that is at least is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the metabolic assay measured is glycolytic reserve. In some embodiments, the metabolic assay is glycolytic reserve. In some embodiments, the metabolic assay is spare respiratory capacity. To measure cellular (respiratory) metabolism cells were treated with inhibitors of mitochondrial respiration and glycolysis to determine a metabolic profile for the TIL consisting of the following measures: baseline oxidative orylation (as ed by OCR), spare respiratory ty, baseline ytic activity (as measured by ECAR), and glycolytic e. Metabolic profiles were med using the Seahorse ation Mitochondrial/Glycolysis Stress Test Assay (including the kit commercially available from Agilent®), which allows for determining a cells’ ty to perform glycolysis upon blockage of mitochondrial ATP production. In some embodiments, cells are starved of glucose, then glucose is injected, followed by a stress agent. In some embodiments, the stress agent is selected from the group consisting of oligomycin, FCCP, rotenone, antimycin A and/or 2-deoxyglucose (2-DG), as well as combinations thereof. In some embodiments, oligomycin is added at 10 mM. In some embodiments, FCCP is added at mM. In some embodiments, rotenone is added at 2.5 mM. In some embodiments, antimycin A is added at 2.5 mM. In some embodiments, yglucose (2-DG) is added at 500 mM. In some embodiments, ytic capacity, glycolytic reserve, and/or non-glycolytic acidification are measured. In general, TILs have a glycolytic reserve that is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of y harvested TILs. In some embodiments, the glycolytic reserve is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic e is from about 60% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the ytic reserve is from about 70% to about 99% of the basal respiration rate of freshly ted TILs. In some embodiments, the glycolytic reserve is from about 80% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 90% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the ytic reserve is from about 95% to about 99% of the basal respiration rate of freshly harvested TILs.

In some embodiments, the metabolic assay is basal glycolysis. In some embodiments second expansion TILs or additional second expansion TILs, such as those in Step D (including, for example, TILs referred to as reREP which have undergone an additional second expansion) have an increase in basal glycolysis of at least two-fold, at least three-fold, at least four-fold, at least five-fold, at least ld, at least 7-fold, at least eight- fold, at least old, or at least ld. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal glycolysis of about two-fold to about ten-fold. In some embodiments, the second expansion TILs or onal second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an se in basal glycolysis of about two-fold to about eight-fold. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal glycolysis of about three-fold to about seven-fold. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal glycolysis of about two-fold to about four-fold. In some embodiments, the second expansion TILs or additional second expansion, such as those in Step D (including TILs referred to as reREP TILs) have an increase in basal glycolysis of about two—fold to about three—fold.

In general, second expansion TILs or additional second expansion, such as those in Step D (including, for example, TILs referred to as reREP which have one an additional second expansion) TILs have a ytic reserve that is at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 97%, at least 98%, or at least 99% of the basal respiration rate of y harvested TILs. In some embodiments, the glycolytic reserve is from about 50% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the glycolytic reserve is from about 60% to about 99% of the basal respiration rate of freshly WO 81473 2017/058610 harvested TILs. In some embodiments, the glycolytic e is from about 70% to about 99% of the basal respiration rate of y harvested TILs. In some embodiments, the glycolytic reserve is from about 80% to about 99% of the basal respiration rate of freshly harvested TILs. In some ments, the glycolytic reserve is from about 90% to about 99% of the basal respiration rate of y harvested TILs. In some embodiments, the glycolytic reserve is from about 95% to about 99% of the basal respiration rate of freshly harvested TILs. In some embodiments, the second expansion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure 11, including TILs referred to as reREP TILs) have a spare respiratory capacity that is not statistically significantly different than the basal respiration rate of freshly harvested TILs.

Granzyme B Production: Granzyme B is another measure of the ability of TIL to kill target cells. Media supernatants restimulated as bed above using antibodies to CD3, CD28, and CD137/4—1BB were also ted for their levels of Granzyme B using the Human Granzyme B DuoSet ELISA Kit (R & D Systems, Minneapolis, MN) according to the manufacturer’s instructions. In some embodiments, the second expansion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure 11, including TILs referred to as reREP TILs) have increased Granzyme B production. In some embodiments, the second expansion TILs or second additional expansion TILs (such as, for e, those described in Step D of Figure 11, including TILs ed to as reREP T]Ls) have increased cytotoxic activity.

In some embodiments, the present methods include an assay for assessing TIL viability, using the methods as described above. In some embodiments, the TILs are expanded as discussed above, including for example as provided in Figure 11. In some ments, the TILs are cryopreserved prior to being assessed for viability. In some embodiments, the viability assessment includes thawing the TILs prior to ming a first expansion, a second expansion, and an additional second expansion. In some embodiments, the present methods provide an assay for assessing cell proliferation, cell ty, cell death, and/or other terms related to viability of the TIL population. Viability can be measured by any of the TIL metabolic assays described above as well as any methods know for assessing cell viability that are known in the art. In some embodiments, the present methods provide as assay for assessment of cell proliferation, cell toxicity, cell death, and/or other terms related to viability of the TILs expanded using the methods described herein, including those exemplified in Figure ll.

The present invention also provides assay s for determining TIL viability.

The present disclosure provides methods for assaying TILs for viability by ing tumor infiltrating lymphocytes (TILs) into a larger population of TILs comprising: (i) obtaining a first population of TILs which has been previously expanded; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs, and (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with onal IL-2, OKT-3, and antigen presenting cells , to produce a third population of TILs, wherein the third population of TILs is at least d or lOO-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs, and wherein the third population is further assayed for viability.

In some embodiments, the method further comprises: (iv) performing an additional second ion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and additional APCs, n the additional second expansion is performed for at least 14 days to obtain a larger population of TILs than obtained in step (iii), wherein the larger population of TILs comprises an increased subpopulation of or T cells and/or central memory T cells ve to the third population of TILs, and wherein the third population is further assayed for viability.

] In some embodiments, prior to step (i), the cells are cryopreserved.

In some embodiments, the cells are thawed prior to performing step (i).

In some embodiments, step (iv) is repeated one to four times in order to obtain sufficient TILs for analysis.

] In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days.

In some embodiments, steps (i) through (iii) or (iv) are med within a period of about 42 days to about 45 days.

In some embodiments, steps (i) through (iii) or (iv) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (iv) express CD4, CD8, and TCR 0t [3 at levels similar to freshly harvested cells.

] In some embodiments, the antigen presenting cells are peripheral blood mononuclear cells (PBMCs).

In some embodiments, the PBMCS are added to the cell culture on any of days 9 through 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the larger population of TILs in step (iv) t one or more teristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or l memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

In some embodiments, the APCS are artificial APCs (aAPCs).

In some embodiments, the method further comprises the step of transducing the first population of TILs with an expression vector sing a nucleic acid ng a high- affinity T cell receptor.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the method r comprises the step of ucing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising a single chain variable fragment antibody fused with at least one endodomain of a T-cell ing molecule.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the TILs are assayed for viability.

In some embodiments, the TILs are assayed for viability after cryopreservation.

] In some embodiments, the TILs are assayed for viability after cryopreservation and after step (iv).

] According to the t disclosure, a method for assaying TILs for viability and/or further use in stration to a subject. In some ments, the method for assay tumor infiltratitng lymphocytes (TILs) comprises: (i) obtaining a first population of TILs; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs, and (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold greater in number than the second population of TILs; (iv) harvesting, washing, and cryopreserving the third tion of TILs; (v) storing the cryopreserved TILs at a cryogenic ature, (vi) thawing the third population of TILs to provide a thawed third population of TILs, and (vii) performing an additional second expansion of a portion of the thawed third population of TILs by supplementing the cell culture medium of the third population with IL—2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the third expansion is performed to obtain a fourth population of TILs, wherein the number of TILs in the fourth population of TILs is compared to the number of TILs in the third population of TILs to obtain a ratio, (viii) determining based on the ratio in step (vii) whether the thawed population of TILs is suitable for administration to a patient, (ix) administering a therapeutically ive dosage of the thawed third population of TILs to the t when the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is determined to be greater than 5:1 in step (viii).

In some embodiments, the reREP period is performed until the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is greater than 50:1.

In some embodiments, the number of TILs sufficient for a therapeutically effective dosage is from about 2.3X1010 to about 13.7X1010.

In some embodiments, steps (i) through (vii) are performed within a period of about 40 days to about 50 days. In some embodiments, steps (i) h (vii) are performed within a period of about 42 days to about 48 days. In some ments, steps (i) through (vii) are performed within a period of about 42 days to about 45 days. In some embodiments, steps (i) through (vii) are performed within about 44 days.

In some embodiments, the cells from steps (iii) or (vii) s CD4, CD8, and TCR 0t [3 at levels similar to freshly harvested cells. In some embodiments the cells are TILs.

In some embodiments, the antigen presenting cells are eral blood mononuclear cells (PBMCs). In some embodiments, the PBMCs are added to the cell culture on any of days 9 h 17 in step (iii).

In some embodiments, the effector T cells and/or central memory T cells in the larger population of TILs in steps (iii) or (vii) exhibit one or more teristics selected from the group consisting of sion of CD27, expression of CD28, longer telomeres, increased CD57 expression, and decreased CD56 expression, relative to effector T cells, and/or central memory T cells in the third population of cells.

In some embodiments, the effector T cells and/or central memory T cells exhibit increased CD57 sion and decreased CD56 expression.

In some embodiments, the APCs are artificial APCs (aAPCs).

In some embodiments, the step of transducing the first tion of TILs with an expression vector comprising a nucleic acid encoding a high-affinity T cell or.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric n receptor (CAR) comprising a single chain variable fragment antibody fused with at least one endodomain of a T-cell signaling molecule.

In some embodiments, the step of transducing occurs before step (i).

In some embodiments, the TILs are assayed for viability after step (vii).

The present disclosure also provides further methods for assaying TILs. In some embodiments, the disclosure provides a method for assaying TILs comprising: (i) obtaining a portion of a first population of cryopreserved TILs, (ii) thawing the portion of the first population of cryopreserved TILs; (iii) performing a first expansion by culturing the n of the first population of T]Ls in a cell culture medium comprising 11—2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second tion of TILs, wherein the portion from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5: 1, (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient; (v) determining the first population of TILs is suitable for use in therapeutic stration when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first population of TILs is determined to be greater than :1 in step (iv).

] In some ments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 50:1.

In some embodiments, the method further comprises performing expansion of the entire first population of cryopreserved TILs from step (i) according to the methods as described in any of the embodiments provided herein.

In some embodiments, the method further ses administering the entire first tion of cryopreserved TILs from step (i) to the patient.

] In some embodiments, the cryopreserved TILs are thawed and a second expansion performed to determine if the cells expand sufficiently. If the cells expand to a ratio of at least 5: l, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 10:1, the TILs are ently viably for administration to the t. If the cells expand to a ratio of at least 15:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 20:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 25:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least :], the TILs are sufficiently viably for stration to the patient. If the cells expand to a ratio of at least 35:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 40: l, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 45:1, the TILs are sufficiently viably for administration to the patient. If the cells expand to a ratio of at least 5:], the TILs are sufficiently viably for administration to the patient.

] The present disclosure also es further methods for assaying TILs. In some embodiments, the disclosure provides a method for assaying TILs comprising: (i) obtaining a n of a first tion of cryopreserved TILs, (ii) thawing the portion of the first population of cryopreserved TILs, (iii) performing a first expansion by culturing the portion of the first population of TILs in a cell culture medium comprising IL-2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, wherein the portion from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5: 1; (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient; and (v) therapeutically administering the remainder of the first population of TILs to the patient when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first population of TILs is determined to be greater than 5:1 in step (iv).

In some embodiments, the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first tion of TILS is greater than 50:1.

In some embodiments, the method r comprises ming ion of the entire first population of cryopreserved TILs from step (i) according to the methods of any of the preceding claims.

In some embodiments, the method further comprises administering the entire first population of cryopreserved TlLs from step (i) to the patient.

In some embodiments, the method further comprised the step of assessing the metabolic health of the second population of TILs.

In some embodiments, the method further comprises the step of assessing the ype of the second population of TILs.

In some embodiments, the antigen presenting cells are allogeneic peripherial blood mononuclear cells.

L. Methods of Treating Patients Methods of treatment begin with the initial TIL collection and culture of TILs. Such methods have been both described in the art by, for example, Iin el al. (J. Immunolhempy, 2012, 35(3):283—292), incorporated by reference herein in its entirety. As well as described throughout the Examples section below.

The present invention provides novel methods for TIL tion that have not been previously described, e. g, TILs produced according to Steps A through F. The expanded TILs produced according to Steps A through F above or as otherwise ed as described herein find particular use in the treatment of patients with cancer. General methods of using TILs for the treatment of cancer have been described in Goff, et al., J. Clinical gy, 2016, 34(20):2389-239, as well as the mental content; incorporated by reference herein in its entirety.) Similarly, the TILs produced ing to the present invention can also be used for the ent of cancer. In some embodiments, TIL were grown from resected deposits of metastatic melanoma as previously described (see, Dudley, et al., JImmunother., 2003, 26:332-342, incorporated by reference herein in its ty). Fresh tumor can be dissected under sterile conditions. A representative sample can be ted for formal pathologic analysis. Single fragments of 2 mm3 to 3 mm3. In some embodiments, 5, 10, 15, , 25 or 30 samples per patient are obtained. In some embodiments, 20, 25, or 30 samples per t are obtained. In some embodiments, 20, 22, 24, 26, or 28 samples per patient are obtained, In some embodiments, 24 samples per patient are obtained. Samples can be placed in dual wells of a 24-well plate, ined in growth media with high-dose IL-2 (6,000 IU/mL), and monitored for destruction of tumor and/or proliferation of TIL. Any tumor with viable cells remaining after processing can be enzymatically digested into a single cell suspension and cryopreserved, as described herein.

In some embodiments, expanded TILs can be sampled for phenotype analysis (CD3, CD4, CD8, and CD56) and tested against autologous tumor when available. TILs can be considered reactive if overnight ture yielded interferon-gamma (IFN—y) levels > 200 pg/mL and twice background. (Goff, et al., JImmunother., 2010, 33:840-847, incorporated by nce herein in its entirety). In some embodiments, cultures with ce of autologous reactivity or sufficient growth patterns can be selected for a second expansion (for example, a second expansion as provided in according to Step D of Figure 11), including second expansions that are sometimes referred to as rapid ion (REP). In some embodiments, expanded TILs with high autologous reactivity (for e, high proliferation during a second expansion), are selected for an additional second expansion. In some embodiments, TILs with high autologous reactivity (for example, high proliferation during second expansion as provided in Step D of Figure 11), are selected for an additional second expansion according to Step D of Figure 11.

In some embodiments, the patient is not moved ly to ACT (adoptive cell transfer), for example, in some embodiments, after tumor harvesting and/or a first expansion, the cells are not utilized immediately. In such embodiments, TILs can be cryopreserved and thawed 2 days before the second expansion step (for e, in some embodiments, 2 days before a step referred to as a REP step). In such embodiments, TILs can be cryopreserved and thawed 2 days before the second expansion step (for example, in some embodiments, 2 days before a Step D as provided in Figure 11). As described in various embodiments throughout the present application, the second ion (including ses referred to as REP) used OKT3 (anti-CD3) antibody (Miltenyi Biotech, San Diego, CA) and IL-2 (3,000 IU/mL, Prometheus, San Diego, CA) in the presence of irradiated feeder cells, autologous when possible, at a 100:1 ratio (see, Dudley, et al., J Immunother., 2003, 26:332-342; incorporated by nce herein in its entirety). In some embodiments, the TILs can be cryopreserved and thawed 5 days before the second expansion step. In some embodiments, the TILs can be cryopreserved and thawed 4 days before the second expansion step. In some embodiments, the TILs can be cryopreserved and thawed 3 days before the second expansion step. In some ments, the TILs can be cryopreserved and thawed 2 days before the second expansion step. In some ments, the TILs can be cryopreserved and thawed 1 day before the second expansion step. In some embodiments, the TILs can be eserved and thawed immediately before the second expansion step.

Cell phenotypes of cryopreserved samples of on bag TIL can be analyzed by flow cytometry (FlowJo) for surface markers CD3, CD4, CD8, CCR7, and CD45RA (BD BioSciences), as well as by any of the methods described . Serum cytokines were measured by using standard enzyme-linked immunosorbent assay ques. A rise in serum IFN-g was defined as >100 pg/mL and greater than 4 3 baseline levels. 1. Optional Lymphodepletion Preconditioning of Patients mental findings indicate that lymphodepletion prior to adoptive transfer of tumor-specific T lymphocytes plays a key role in enhancing treatment efficacy by eliminating regulatory T cells and competing elements of the immune system (‘cytokine sinks’).

Accordingly, some embodiments of the ion utilize a lymphodepletion step (sometimes also referred to as “immunosuppressive conditioning”) on the patient prior to the introduction of the second expansion TILs or second additional expansion TILs (such as, for example, those described in Step D of Figure ll, including TILs referred to as reREP TILs) of the invention.

In general, lymphodepletion is done using fludarabine and/or cyclophosphamide (the active form being referred to as mafosfamide) and combinations f. Such methods are described in Gassner et al. (Cancer Immunol Immunother. 2011, 60(1):75—85, ki, et al., Nat Clin Pracl Oncol, 2006 3(l2):668—68l, Dudley, et al., J Clin Oncol 2008, 26:5233-5239, and Dudley, et al., JClz'n Oncol. 2005, 23(10):2346—23 57, all ofwhich are incorporated by reference herein in their entireties.

In some embodiments, the fludarabine is at a concentration of 0.5 [lg/ml -10 ug/ml fludarabine (Sigma-Aldrich, MO, USA). In some embodiments, the fludarabine is at a concentration of l ug/ml fludarabine (Sigma-Aldrich, MO, USA). In some embodiments, the fludarabine treatment is for 1 day, 2 days, 3 days, 4 days, 5 days, 6 days, or 7 days or more.

In some embodiments, the fludarabine is administered at a dosage of 10 mg/kg/day, mg/kg/day, 20 day, 25 mg/kg/day, 30 day, 35 day, 40 mg/kg/day, or 45 mg/kg/day. In some embodiments, the fludarabine ent is for 2-7 days at mg/kg/day. In some embodiments, the fludarabine treatment is for 4-5 days at mg/kg/day. In some embodiments, the fludarabine treatment is for 4-5 days at mg/kg/day.

] In some embodiments, the mafosfamide, the active form of cyclophosphamide, is at a concentration of 0.5 ug/ml -10 ug/ml. In some embodiments, the mafosfamide, the active form of cyclophosphamide, is at a tration of 1 ug/ml. In some embodiments, the cyclophosphamide treatment is for 1 day, 2 days, 3 days, 4 days, 5 days, 6 days, or 7 days or more. In some embodiments, the cyclophosphamide is administered at a dosage of 100 mg/mZ/day, 150 mg/mZ/day, 175 day, 200 mg/mZ/day, 225 mg/mZ/day, 250 mg/mZ/day, 275 mg/mz/day, or 300 mg/mZ/day. In some embodiments, the cyclophosphamide is administered intravenously (7.6., i.v.) In some embodiments, the cyclophosphamide treatment is for 2-7 days at 35 mg/kg/day. In some embodiments, the cyclophosphamide treatment is for 4-5 days at 250 mg/mZ/day iv. In some embodiments, the cyclophosphamide treatment is for 4 days at 250 mg/mZ/day i.v.

In some embodiments, the fludarabine and the cyclophosphamide are administered together to a patient. In some embodiments, fludarabine is administered at 25 mg/mZ/day iv. and cyclophosphamide is administered at 250 mg/mZ/day i.v. over 4 days.

This protocol includes administration of fiudarabine (25 mg/mZ/day iv.) and cyclophosphamide (250 mg/mZ/day iv.) over 4 days. 2, Exemplary Treatment Embodiments In some embodiments, the present sure provides a method of treating a cancer with a population of tumor infiltrating lymphocytes (TILs) comprising the steps of (a) ing a first population of TILs from a tumor resected from a patient; (b) ming an initial ion of the first population of TILs in a first cell culture medium to obtain a second population of TILs, wherein the second population of TILs is at least 5-fold r in number than the first population of TILs, and wherein the first cell culture medium ses IL-2, (c) performing a rapid expansion of the second population of TILs using a population of myeloid artificial antigen presenting cells (myeloid aAPCs) in a second cell culture medium to obtain a third population of TILs, n the third population of TILs is at least 50-fold greater in number than the second tion of TILs after 7 days from the start of the rapid expansion; and wherein the second cell culture medium ses IL-2 and OKT-3; (d) administering a therapeutically effective portion of the third population of TILs to a patient with the cancer. In some embodiments, the IL-2 is present at an initial concentration of about 3000 IU/mL and OKT-3 antibody is present at an initial concentration of about 30 ng/mL in the second cell e medium. In some embodiments, first expansion is performed over a period not greater than 14 days. In some ments, the first expansion is performed using a gas permeable container. In some embodiments, the second expansion is performed using a gas permeable container. In some embodiments, the ratio of the second population of TILs to the tion of aAPCs in the rapid expansion is between 1 to 80 and l to 400. In some embodiments, the ratio of the second tion of TILs to the population of aAPCs in the rapid expansion is about 1 to 300. In some embodiments, the cancer for treatment is selected from the group consisting of melanoma, ovarian cancer, cervical cancer, all-cell lung cancer ), lung cancer, bladder cancer, breast cancer, cancer caused by human oma virus, head and neck cancer, renal cancer, and renal cell carcinoma. In some embodiments, the cancer for treatment is selected from the group consisting of melanoma, ovarian cancer, and cervical . In some embodiments, the cancer for treatment is melanoma. In some embodiments, the cancer for treatment is ovarian cancer. In some embodiments, the cancer for ent is cervical cancer. In some embodiments, the method of treating cancer further comprises the step of treating the patient with a non-myeloablative lymphodepletion regimen prior to administering the third population of TILs to the t. In some embodiments, the non-myeloablative lymphodepletion regimen comprises the steps of administration of cyclophosphamide at a dose of 60 mg/m2/day for two days followed by administration of fludarabine at a dose of 25 day for five days. In some embodiments, the high dose IL-2 n ses 600,000 or 720,000 IU/kg of aldesleukin, or a biosimilar or variant thereof, administered as a 15-minute bolus intravenous on every eight hours until tolerance. 3. Methods of co-administration In some embodiments, the TILs produced as described herein in Steps A through F can be administered in combination with one or more immune checkpoint regulators, such as the antibodies described below. For e, antibodies that target PD-l and which can be co—administered with the TILs of the present invention include, e.g, but are not limited to nivolumab (EMS-93 6558, Bristol-Myers Squibb; Opdivo®), pembrolizumab (lambrolizumab, MK03475 or MIC-3475, Merck, Keytruda®), humanized anti-PD-l antibody J8001 (ShangHai JunShi), monoclonal anti—PD—l antibody TSR-042 (Tesaro, Inc.), Pidilizumab (anti-PD-l mAb CT-Ol l, Medivation), anti-PD-l monoclonal Antibody BGB- A317 (BeiGene), and/or anti-PD-l antibody SHR-lZlO (ShangHai HengRui), human monoclonal antibody REGN2810 (Regeneron), human monoclonal antibody MDX—1106 (Bristol-Myers Squibb), and/or humanized anti-PD-l IgG4 antibody PDROOl tis). In some embodiments, the PD-l antibody is from clone: 4 (rat IgG) - BioXcell cat# BPOl46. Other suitable antibodies suitable for use in co-administration methods with TILs produced according to Steps A through F as described herein are anti-PD-l antibodies disclosed in US. Patent No. 8,008,449, herein incorporated by reference. In some embodiments, the antibody or antigen-binding portion f binds specifically to PD-Ll and inhibits its interaction with PD-l, y increasing immune activity. Any antibodies known in the art which bind to PD-Ll and disrupt the interaction between the PD-l and PD- L1, and stimulates an anti- tumor immune response, are le for use in inistration methods with TILs produced ing to Steps A h F as described herein. For example, antibodies that target PD-Ll and are in clinical trials, e EMS-936559 (Bristol-Myers Squibb) and MPDL3280A (Genentech). Other suitable antibodies that target PD-Ll are disclosed in US. Patent No. 7,943,743, herein incorporated by nce. It will be understood by one of ordinary skill that any dy which binds to PD-l or PD-Ll, disrupts the PD-l/PD-Ll interaction, and stimulates an anti-tumor immune response, are suitable for use in co—administration methods with TILs produced according to Steps A through F as described herein. In some ments, the subject administered the ation of TILs ed according to Steps A through F is co-administered with a and anti-PD-l antibody when the patient has a cancer type that is tory to administration of the anti-PD-l antibody alone. In some embodiments, the patient is administered TILs in combination with and anti-PD-l when the patient has refactory melanoma. In some embodiments, the patient is administered TILs in combination with and anti-PD-l when the patient has non-small cell lung carcinoma (NSCLC). 4. Adoptive Cell Transfer Adoptive cell er (ACT) is a very effective form of immunotherapy and involves the transfer of immune cells with antitumor activity into cancer patients. ACT is a treatment approach that involves the identification, in vitro, of lymphocytes with antitumor activity, the in vitro ion of these cells to large numbers and their infusion into the cancer-bearing host. Lymphocytes used for adoptive transfer can be derived from the stroma of resected tumors (tumor infiltrating lymphocytes or TILs). TILs for ACT can be prepared as described herein. In some embodiments, the TILs are prepared, for example, according to a method as described in Figure 11. They can also be derived or from blood if they are genetically engineered to express antitumor T—cell receptors (TCRs) or chimeric antigen receptors (CARS), enriched with mixed lymphocyte tumor cell es (MLTCs), or cloned using autologous antigen presenting cells and tumor derived peptides. ACT in which the lymphocytes originate from the cancer-bearing host to be infused is termed autologous ACT.

U. S. Publication No. 2011/0052530 relates to a method for performing adoptive cell therapy to promote cancer regression, primarily for treatment of patients suffering from atic melanoma, which is incorporated by reference in its entirety for these methods.

In some embodiments, TILs can be administered as described herein. In some ments, TILs can be administered in a single dose. Such administration may be by injection, e.g., intravenous injection. In some embodiments, TILs and/or cytotoxic lymphocytes may be administered in multiple doses. Dosing may be once, twice, three times, four times, five times, six times, or more than six times per year. Dosing may be once a month, once every two weeks, once a week, or once every other day. Administration of TILs and/or xic cytes may continue as long as necessary.

I. Exemplary Embodiments In an embodiment, the invention provides a method for expanding tumor infiltrating lymphocytes (TILs) comprising: (a) obtaining a first population of TILs from a tumor ed from a patient; (b) performing an initial expansion of the first population of TILs in a first cell culture medium to obtain a second population of TILs, wherein the first cell culture medium comprises IL-2, (c) ming a rapid expansion of the second population of TlLs, wherein the third population of TlLs is at least lOO-fold greater in number than the second population of TILs, and wherein the second cell e medium comprises IL-2, OKT-3, and peripheral blood mononuclear cells (PBMCs), wherein the rapid expansion is performed for at least 14 days, (d) removing the cells from the second cell culture medium and ally cryopreserving the cells in a storage medium to obtain a third population of cells; (e) optionally thawing the third population of cells, and (f) performing a second rapid expansion of the third population of TlLs in a third cell culture medium, wherein the third cell culture medium comprises IL—2, OKT-3, and peripheral blood mononuclear cells (PBMCs), wherein the second rapid expansion is performed for at least 14 days, to obtain a fourth tion of TILs, wherein the fourth population of cells exhibits an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs; and g) optionally, ing step f) one or more times.

In an embodiment, the invention provides that said restimulated cells express CD4, CD8 and TCR 0t [3 at levels similar to freshly harvested cells.

In an embodiment, the invention provides that said reREP medium comprises peripheral blood mononuclear cells (PBMCs).

In an embodiment, the invention provides that said PBMCs are added to the TILs on any of days 9 through 17. In some embodiments, the invention provides that said PBMCs are added to the TlLs on days 9, 10, ll, 12, l3, 14, 15, 16, and/or 17.

In an embodiment, the invention provides that said reREP medium comprises aAPCs.

In an ment, the invention provides that the cryopreserved TILs were uced with an expression vector comprising a nucleic acid encoding a high-affinity T cell receptor.

In an embodiment, the ion provides that the cryopreserved TILs were transduced with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising an immunoglobulin light chain fused with an endodomain of a T- cell signaling molecule.

In an embodiment, the invention provides that ulated TILs are infused into a patient.

In an embodiment, the invention provides that step (1) r comprises removing the cells from the second cell culture .

In an ment, the invention provides that step i) is repeated a sufficient number of times in order to obtain sufficient TILs for a therapeutic dosage of said TILs.

In an embodiment, the invention provides a population of restimulated TILs made ing to the methods described above and herein.

In an embodiment, the invention provides a population of restimulated TILs made according to the method of claim 1 wherein said ulated TILs have at least a two- fold se in basal glycolysis as compared to said thawed cryopreserved TILs.

In an embodiment, the invention provides a method for assessing the metabolic activity of a TIL cell population comprising measuring the basal glycolysis of said cells In an embodiment, the invention provides a method for assessing the metabolic activity of a TIL cell population comprising measuring the basal respiration of said cells.

In an embodiment, the invention provides a method for assessing the metabolic activity of a TIL cell tion comprising measuring the spare respiratory capacity (SRC) of said cells.

In an embodiment, the invention provides a method for assessing the lic activity of a TIL cell population comprising measuring the glycolytic reserve of said cells.

In an embodiment, the invention provides a method of treating cancer in a patient with a population of tumor infiltrating lymphocytes (TILs) sing the steps of: a) obtaining a primary TIL population from said patient, b) rapidly ing said y TIL population to form an expanded TIL population, c) cryopreserving said expanded population to form a cryopreserved TIL population; (1) thawing said cryopreserved TIL population, 6) culturing said cryopreserved TIL population in media comprising IL-2 and anti- CD3 antibody to form a reREP TIL population, and f) administering a eutically effective amount of reREP TIL cells to said t.

In an embodiment, the ion provides a method for expanding tumor ating lymphocytes (TILs) comprising: (a) obtaining a first population of TILs from a tumor resected from a patient (b) performing an initial expansion of the first population of TILs in a first cell culture medium to obtain a second population of TILs, wherein the first cell culture medium comprises IL—2; (c) performing a rapid expansion of the second population of TlLs, wherein the third population of TlLs is at least lOO-fold greater in number than the second population of TILs, and wherein the second cell culture medium comprises IL-2, OKT-3, and peripheral blood mononuclear cells (PBMCs), wherein the rapid expansion is med for at least 14 days; (d) removing the cells from the second cell culture medium and optionally cryopreserving the cells in a storage medium to obtain a third tion of cells; (e) optionally thawing the third population of cells; (f) performing a second rapid expansion of the third population of TlLs in a third cell culture medium, n the third cell culture medium comprises IL-2, OKT-3, and peripheral blood mononuclear cells (PBMCs), n the second rapid expansion is performed for at least 14 days, to obtain a fourth population of TILs, n the fourth population of cells exhibits an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs, and (g) administering a therapeutically effective amount of reREP TIL cells to said patient.

In an embodiment, the invention provides that step d) further comprises removing the cells from the second cell culture .

In an embodiment, the invention provides that step f) is repeated a sufficient number of times in order to obtain sufficient TILs for a therapeutic dosage of said TILs.

EXAMPLES EXAMPLE 1: RESTIMULATION PROTOCOL As discussed herein, a restimulation protocol and assay were developed utilizing fresh antigen restimulation following harvest or thaw of TILs grown in a REP.

The e of this example was to test the proliferation/expansion of post REP Tumor rating cytes in a Re—stimulation assay. Post REP TIL (post Step D TIL according to Figure 11) were be restimulated with allogeneic PBMC feeder cells, anti-CD3 (clone OKT3) antibody, and interleukin-2 (IL-2). Viable cells were counted on Day 7 and The post REP TIL (post Step D TIL according to Figure 11) were infused into the patients who were previously lymphodepleted to facilitate TIL survival and expansion in viva. Once the TIL were re-infused into the patient, they encountered n, resulting in the activation of the TIL, but the TIL were ultimately short-lived. Re-stimulation of the TIL through antigen contact together with exposure to IL-2 during ACT may result in TIL proliferation and tumor control or may lead to deletion through apoptosis (activation induced cell death) or induction of a non-proliferative (anergic) state due to lack of appropriate co- stimulation. Without being bound by theory, restimulation of post REP TIL (restimulation of, for example post Step D TIL according to Figure 11) with allogeneic PBMC feeder cells may mimic the in vivo process by providing n stimulation and necessary cytokines for TIL expansion. Post REP TIL (post Step D TIL according to Figure 11) were activated through membrane receptors on the feeder MNCS that bind to anti-CD3 (clone OKT3) dy and crosslink to TIL in the REP flask, stimulating the TIL to expand.

Proliferation/Expansion of Post REP Tumor Infiltrating Lymphocytes in a Re- stimulation assay Post REP (post Step D TIL according to Figure ll) TIL were ulated with allogeneic PBMC feeder cells, anti-CD3 (clone OKT3) antibody, and interleukin-2 (IL-2).

Viable cells were d on Day 7 and recorded.

] In some embodiments, this procedure can also be applied to test or validate the current REP protocol.

Table 3: DEFINITIONS AND ABBREVIATIONS AOPI Acridine Oran_e Pro.idium Iodide BSC Biolo_ical Safet Cabinet BSL2 Biosafet Level 2 CM1 te Medium for TIL, #1 CM2 Com .lete Medium for TIL, #2; 50:50 mixture of CMl and AIM-V GMP Good Manufacturin; Processin_ —_IPA Iso..ro 1 alcohol LN2 Licuid nitroen MNC; PBMC Mononuclear Cells; Peri .heral Blood Mononuclear Cells m1 iter NA Not a..1icab1e NR Not recuired MACS® GMP CD3 .ure clone OKT3 antibod Personal .rotective e . ui . ment Initial TIL cultures ori_inatin from tumor frag Ra . id EX . ansion Protocol San Die_o Blood Bank Tumor atin_ L m.hoc te Table 4: Materials GleOTM/Llfe 087-0112DK Technolo; eter ViaStainTM NA Nexcelom CS2-0106 2-8°C AOPI Stainin_ Solution Disposable NA Nexcelom CP2-001 RT Hemac r Prepared as per CMl NA NA 2-8°C Exam 1e 5 GMP recombinant 6 x 106 IU/ml stock human 1L-2 (rh1L-2) solution prepared as per CellGenix 1020—1000 -20°C Example 4 MACS® GMP CD3 pure GMP Miltenyi Biotec 170116 2-8°C clone OKT3 antibod 50ml conical tubes sterile Any in use RT transfer pipets sterile Any in use RT SCGPUOSRE or 500ml filter system EMD/Millipore sterile RT or ecuivalent ecuivalent 24—well tissue culture r or 662160 or sterile RT .lates e . uivalent e . uivalent 5ml, 10ml serological sterile ————_ ———_— Table 5: SPECIMENS eserved and Gamm Stored freezer B N irradiated MNC Feeder lots Post-REP TIL cells Fresh or Frozen in Iovance NA NA r Biotechnoloies The post REP (post Step D TIL ing to Figure 11) TIL were infused into the patients who were prior lymphodepleted to facilitate TIL survival and expansion in vivo.

Once the TIL were re-infused into the patient, they encountered antigen, resulting in the activation of the TIL, but the TIL were ultimately short-lived. Re-stimulation of the TIL through antigen contact together with exposure to IL-2 during ACT may result in TIL proliferation and tumor control or may lead to deletion through apoptosis (activation induced cell death) or ion of a non-proliferative (anergic) state due to lack of appropriate co- stimulation. Our esis was that restimulation of post REP TIL with allogeneic PBMC feeder cells mimicked the in vivo process by providing antigen stimulation and necessary cytokines for TIL expansion. Post REP TIL were activated through membrane receptors on the feeder MNCs that bind to anti-CD3 (clone OKT3) antibody and ink to TIL in the REP flask, stimulating the TIL to expand.

PROCEDURE Either fresh EP (post Step D TIL according to Figure 11) or frozen post-REP (post Step D TIL according to Figure 11) TIL that was thawed, was washed once in CMl media. The Re-REP (repeat of Step D according to Figure 11) was set up in a 24 well tissue culture plate with 2 X 106 MNC feeder cells, 30 ng/ml OKT3, l x 104 post-REP TIL plus 3,000 IU/ml rhIL-2 in CMZ. The cultures were incubated for seven days in a 5% C02, 37°C humidified incubator at which point viable cell recovery and viability was determined. The fold expansion of TIL was calculated based on the viable cell counts.

ReREP- Day 0 Prepare TIL TILs were ed from fresh post REP or frozen post REP. TIL cultures were removed from the incubator and transferred to the BSC. Next, 200ul was removed for a cell count using the Cellometer K2. Counts were recorded.

Prepare Feeder Cells For this protocol a minimum of 20 X 106 feeder cells were needed. Each 1 ml vial frozen by SDBB had 100 X 106 viable cells upon freezing. Assuming a 50% recovery upon thaw from LN2 storage, it was recommended to thaw at least two vials of feeder cells per lot giving an estimated 100 X 106 viable cells for each REP. Before thawing feeder cells, approximately 50ml of CM2 was pre—warmed without rhIL—2 for each feeder lot that was tested. The designated feeder lot vials were removed from LN2 storage and placed on ice.

Vials were erred to the tissue culture room. Vials were thawed in a 37°C water bath.

Vials were transferred to BSC and sprayed or wiped with 70% EtOH or IPA. Using a transfer pipette, the contents of feeder vials was immediately erred into 50 mL of warm CM2 in a 50-mL conical tube. 200 pl was removed for cell counting using the Cellometer K2. Counts were recorded. Cells were centrifuged at 350 X g for 10 minutes. The supernatant and resuspended cells were aspirated in a desired volume at 2 X 106cells/ml in warm CM2 plus 3000 IU/ml rhIL-2.

Prepare CM2 + 3000 IU/ml working solution A sufficient amount of CM2 was prepared for the conditions needed. Each well contained 2 ml of CM2. Each well was supplemented the CM2 with 3000 IU/mL of .

From the stock of 6 XlO6 IU/mL, 50 ul was needed for each 100 ml of CM2.

Prepare MACS® GMP CD3 pure (OKT3) working solution Stock on of OKT3 (1 mg/ml) was taken out of the 4°C erator. A final concentration of 30 ng/ml OKT3 was used in the REP. 60 ng of OKT3 were needed for 2 ml of CM2 medium in each 24 well. TIL + Feeders, TIL alone and Feeders alone conditions were cultured in triplicates. For each feeder lot tested, 1000 ul of a 1:1000 dilution of lmg/ml OKT3 for a working concentration of lug/ml (1,000 ng/ml) was made. For 9 wells, 1000 ul ofa 1:1000 dilution of lmg/ml OKT3. 1 pl 1 mg/ml OKT3 + 999 pl of CM2 with 3000 IU/ml IL-2 was made.

Prepare 24 Well plate and Coculture.

Each ReREP tested ed 9 wells of 24 well plate.

Each plate was labeled with Experiment Name, Feeder Lot #, post—REP TIL designation, date, and operator ls. Each plate was filled with components as listed in Table 8. Each component was added and each well filled with a total of 2 ml and place the plates into 37°C incubator. Plates were mixed carefully 3 times using 1 ml pipette.

Table 6: REP set-up in 24 well plate Order of on to single well of 24 TIL + Feeders + TIL Feeders + well plate OKT3 +OKT3 OKT3 TIL cells (1 x 104/05 ml) in CM2+1L-2 500 pl 500 pl _ PBMC feeder cells (2x106/l ml) in 1000 ul 1000 ul CM2+IL-2 OKT3 (1000 ng/ml) in CM2+IL-2 60 “1 60 pl 60 pl CM2 +1L-2 440 ul 1440 pl 940 pl Total Volume 2000 ul 2000 ul 2000 ul Media exchange — Day 5 CM2 was prepared with 3000 IU/ml rhIL-2. 10ml was needed. 1 ml of the media was d from each well and discarded. With a 1 ml pipette, 1 ml warm CM2 with 3000 IU/mL rhIL-2 was transferred to each well, The plates were returned to the incubator.

Harvest — Day 7 Using a 1 ml serological pipet, each well was mixed to break up any clumps of cells. After thoroughly mixing cell suspension by ing, 200ul was removed for cell counting using the Cellometer K2. All the conditions were counted and ed for TIL +Feeders +OKT3, TIL +OKT3, and FEEDERS +OKT3.

In addition to 24 well ReREP, separate reREP were set up in 4 upright T25 tissue culture flasks with 1.3 x 107 MNC feeder cells, 30 ng/ml OKT3, 0.65 x 105 pre-REP TIL plus 3,000 IU/ml rhIL-2 in CM2. Note: Please refer to Evaluation of Irradiated Allogeneic Feeder Cells for Rapid Expansion Protocol of LN—144 (Example 6).

Allocation of cells for functional assays: Table 7: Assay Flow Phenotyping 106 Potency — P815effLuc-eGFP 406 For ulation assay to Granzyme-B, IFN— _amma Metabolism 26 TCR Sequencing 16 Store culture supernatant of TIL+ feeders and feeders alone for Multi lex ELISA EVALUATION/ACCEPTANCE CRITERIA Table 8: Acceptance Criteria Used At least a 50fold ex-ansion of Post REP TIL With feeders No expansmn and at least 20%) reduction in the total V1able. 0 . . .

PBMC Feeders cells alone number of feeder cells Reference Procedures — Included in Examples below Table 9: Reference Procedures Determination of Cell Count and Example 2 Viability of TIL es Using the Cellometer K2 Cell Counter -_—CellGenix ia Formulation Example 5 -Evaluation ofIrradiated AllogeneicFeeder Cells for Rapid ExpansionProtocol ofLN— 144 ratin_ L m hoc te after Post REP -Validating the post REP cryofrozenTIL oroduct EXAMPLE 2: DETERMINATION OF CELL COUNT AND VIABILITY OF TIL CULTURES USING THE ETER K2 CELL COUNTER This example provides exemplary instructions for how the operation of the Cellometer K2 Image Cytometer tic cell counter was carried out.

Scope: Determination of the total cell count and viability of cell cultures.

Table 10. Definitions Acridine Orane ium Iodine Biolo_ical Safe t Dulbecco’s Phos hate Buffered Saline Milliliter Mononuclear Blood Cells Not A. .licable Peri .heral Blood Mononuclear Cells PPE Personal Protective Equipment Pre-REP Initial TIL culture before Rapid Expansion ol of culture REP Rapid Expansion Protocol TIL Tumor Infiltrating Lymphocytes PROCEDURE Cell suspension preparation Tflpan Blue Preparation The final Trypan blue concentration was 0.1%. The manufacturer recommended preparing a stock solution of 0.2%. When using Trypan blue on the Cellometer K2, the stock (0.4 %) with PBS was diluted to 0.2 %. The Trypan blue was filtered with a 0.2-0.4 micron filter and aliquoted in small volumes into labeled, capped tubes. The cell suspension was mixed at 1:1 with 0.2 % trypan blue.

AOPI Preparation When using AOPI on the Cellometer K2, the AOPI solution was obtained. Cell samples were stained at 1:1 with AOPI solution. NOTE: When counting high concentration cultures, the cell samples were diluted in cell culture medium prior to the final 1:1 dilution with Trypan Blue or AOPI. The manufacturer’s suggested range of counting was used to determine the best dilution to use.

Cellometer K2 Set—Up The Cellometer K2 equipment was turned on. The Cellometer Image Cytometer icon was selected on the ated computer monitor. On the main screen of the software, one of the Assays listed in the dropdown box was selected. When selecting the appropriate Assay, the Cell Type and Image Mode self-populated. Under “Sample” section, Set User/Sample ID was clicked to open another screen to input operator’s information for specimen. “User ID” was entered. This consisted of the user’s three letter ls. Enter “Sample ID”. The sample ID was derived from incoming specimen information.

Setup dilution parameters When no other dilution was made besides the 1:1 mixture, the dilution factor was 2.

When a dilution was made prior to the final 1:] mixture, the dilution factor was 2 times of the prior dilution. The on factor was updated ing to the mixture used.

Cell Counting The plastic backing was removed from both sides of a Cellometer counting r slide (SDlOO) and placed on top of a clean, lint-free wipe. After preparing the cell sion, a small aliquot of the sample was removed and erred into a well of a ell cell culture plate or tube. When diluting the sample, the dilution was performed using cell culture medium. 20 ul of cell suspension was added into a well of the multiwell cell culture plate or tube. 20ul of 0.2% trypan blue or the AOPI solution was added to the 20ul of cell suspension and the sample mixed thoroughly. 20 ul of the 1:1 solution was measured and transferred it into one side of the counting chamber. NOTE: Touching the clear area of the slide was avoided. As needed, the samples were repeated on the other side of the slide. The chamber was inserted into the slot on the front of the eter. For the AOPI cell counting, “Preview F1” was selected on the main screen to preview the green fluorescent image (live cell) image. For Trypan blue counting, “Preview Brightfield” was selected. The focusing wheel was used to bring image into optimal focus. Cells that had a bright center and a clearly—defined edge. “Count” was selected to begin the counting process. Results were displayed in a ng results pop-up box on the computer screen that showed the results of the counting process.

EXAMPLE 3: CELLOMETER IC2 IMAGE CYTOMETER AUTOMATIC CELL COUNTER This Example describes the procedure for operation of the eter K2 Image ter automatic cell counter. 1. Definitions ul Microliter AOPI Acridine Orange Propidium Iodine BSC Biological Safety Cabinet DPBS Dulbecco's Phosphate Buffered Saline ml Milliliter MNC Mononuclear Blood Cells NA Not Applicable PBMC Peripheral Blood Mononuclear Cells PPE Personal Protective Equipment Pre-REP Initial TIL culture before Rapid Expansion Protocol of culture REP Rapid ion Protocol TIL Tumor Infiltrating Lymphocytes Procedure 7.1 Cell suspension preparation 7.1.1 Trypan Blue Preparation The final Trypan blue concentration was 0.1%. The manufacturer recommended preparing a stock solution of 0.2%. 7.1.1.1 When Trypan blue was used on the Cellometer K2, the stock (0.4 %) was diluted with PBS to 0.2 %. 7.1.1.2 The Trypan blue was filtered with a 0.2-0.4 micron filter and aliquoted in small volumes into labeled, capped tubes. 3 The cell suspension was mixed at 1:1 with 0.2 % trypan blue. 7.1.2 AOPI ation 7.1.2.1 When AOPI was used on the Cellometer K2, the AOPI solution was ed. 7.1.2.2 The cell sample was stained at 1:1 with AOPI solution.

NOTE: When high tration cultures were counted, the cell samples were diluted in cell culture medium prior to the final 1:1 dilution with Trypan Blue or AOPI.

The manufacturer's suggested range of counting was used to determine the best dilution to use. 7.2 Cellometer K2 Set-Up 7.2.1 The Cellometer K2 equipment was turned on. 7.2.2 The Cellometer Image Cytometer icon was selected on the ated computer r. 7.2.3 On the main screen of the software, one of the Assays listed in the dropdown box was selected. 7.2.3.1 When the appropriate Assay was selected, the Cell Type and Image Mode self-populated. 7.2.3.2 Under “Sample” section, Set User/Sample ID was selected to open another screen to input operator's information for specimen. 7.2.3.2.1 The “User ID” was entered. 7.2.3.2.2 The e ID” was entered. The sample ID was derived from incoming specimen information. 7.2.3.3 Dilution parameters were set up. 7.2.3.3.1 When no other dilution was made besides the 1:1 mixture, the dilution factor was 2. 7.2.3.3.2 When a dilution was made prior to the final 1:1 mixture, the dilution factor was 2 times of the prior dilution. 7.2.3.3.3 The dilution factor was updated according to the mixture used in the dilution section of the . The pencil icon was selected to bring up the dialog screens. 7.2.3.3.4 The F1 Image and F2 Image sections were d to be identical to each other. 7.2.3.3.5 The “Save” button was selected after set up was completed. 7.3 Cell Counting 7.3.1 The plastic backing from both sides of a Cellometer counting chamber slide (SD100) was removed and placed on top of a clean, lint-free wipe. 7.3.2 After the cell suspension was ed, a small aliquot of the sample was removed and transferred into a well of a ell cell culture plate or tube. 7.3.3 When the sample was diluted, the dilution was med using cell culture medium. 7.3.4 20 ul of cell suspension was added into a well of the multiwell cell culture plate or tube. 7.3.5 20 ul of 0.2% trypan blue or the AOPI on was added to the 20 pl of cell suspension and mix sample thoroughly. 7.3.6 20 ul of the 1:1 solution was measured and transferred it into one side of the counting chamber.

NOTE: Touching the clear area of the slide was avoided. 7.3.7 When necessary, the sample was repeated on the other side of the slide. 7.3 .8. The chamber was inserted into the slot on the front of the Cellometer. 7.3.8 For the AOPI cell counting, “Preview F1” was selected on the main screen to preview the green fluorescent image (live cell) image. For Trypan blue counting, “Preview Brightfield” was selected. 7.3.9 The focusing wheel was used to bring image into optimal focus. Cells had a bright center and a clearly-defined edge. 7.3.10 “Count” was ed to begin the counting process. 7311 Results were displayed in a ng results pop—up box on the computer screen that showed the results of the counting process.

EXAMPLE 4: PREPARATION OF IL-2 STOCK SOLUTION (CELLGENIX) This example describes an exemplary preparation procedure for an IL-2 stock solution.

Definitions/Abbreviations uL: iter or ul BSC: Biological Safety t BSLZ: Biosafety Level 2 D-PBS: co's Phosphate Buffered Saline G: Gauge GMP: Good Manufacturing Processing HAc: Acetic Acid HSA: Human Serum Albumin mL: Milliliter NA: Not applicable PPE: Personal Protective ent rhlL-Z; IL-Z: Recombinant human Interleukin-2 COA: Certificate of Analysis 6. Procedure WO 81473 6.1 Prepared 0.2% Acetic Acid solution (HAc). 6.1.1 Transferred 29 mL sterile water to a 50 mL conical tube. 6.1.2 Added 1 mL 1 N acetic acid to the 50 mL conical tube. 6.1.3 Mixed well by inverting tube 2-3 times. 6.1.4 Sterilized the HAc solution by filtration using a Steriflip filter. 6.1.5 , dated and labeled the solution “Sterile 0.2% Acetic Acid Solution.” 6.1.6 Solution expired after 2 . Stored at room temperature. 6.2 Prepared 1% HSA in PBS. 6.2.1 Added 4mL of 25% HSA stock solution to 96mL PBS in a 150mL sterile filter unit. 6.2.2 ed solution. 6.2.3 Capped, dated and labeled the solution “1% HSA in PB S.” 6.2.4 Solution expired after 2 . Stored 4°C. 6.3 For each vial of rhIL-2 prepared, nt. 6.4 Prepared rhIL-2 stock solution (6x106 IU/mL final concentration) 6.4.1 Each lot of rh1L-2 was different and required information found in the manufacturer's Certificate of Analysis (COA), such as: 6.4.1.1 Mass of rh1L-2 per vial (mg) 6.4.1.2 Specific activity of rh1L-2 (IU/mg) 6.4.1.3 Recommended 0.2% HAc reconstitution volume (mL) 6.4.2 Calculated the volume of 1% HSA required for rhlL—2 lot by using the equation below: Vial Muss: {mg} 21 Binéogicaé 333331333; {4%} :94 -— Hm mi {33333 x 1% as3-1 vol {mi} WWW... 8x335 4.: 6.42.] For example, according to CellGenix's rhIL-2 lot 10200121 COA, the specific activity for the 1 mg vial was 25x106 lU/mg. It recommends reconstituting the rh1L-2 in 2mL 0.2% HAc. a EgrififimH“: . Ems; .. : ,m 233-33.. mm. 2.1.6’F-m3i3‘f'fifi 6x305: 3+3 . $733: 6.4.3 Wiped rubber stopper of IL-2 vial with alcohol wipe. 6.4.4 Using a 16G needle attached to a 3mL syringe, the ended volume of 0.2% HAc was injected into the vial. Care was taken to not dislodge the stopper as the needle was withdrawn. 6.4.5 ed vial 3 times and swirled until all powder was dissolved. 6.4.6 The stopper was carefully removed and set aside on an alcohol wipe. 6.4.7 Added the calculated volume of 1% HSA to the vial. 6.4.8 Capped the vial with the rubber stopper. 6.5 Storage of rhIL-2 solution 6.5.1 For short-term storage (<72hrs), vials were stored at 4°C. 6.5.2 For long-term storage (>72hrs), the vial was aliquoted into smaller volumes and stored in als at -20°C until ready to use.

Freeze/thaw cycles were avoided, Expired 6 months after date of preparation. 6.5.3 Rh-IL-2 labels included vendor and catalog , lot number, expiration date, operator initials, concentration and volume of aliquot.

EXAMPLE 5: PREPARATION OF MEDIA FOR PRE-REP AND REP PROCESSES This Example bes the procedure for the preparation of tissue culture media for use in ols involving the culture of tumor infiltrating lymphocytes (TIL) derived from various tumor types including, but not limited to, metastatic melanoma, head and neck squamous cell carcinoma, ovarian carcinoma, triple-negative breast carcinoma, and lung adenocarcinoma. In many cases, this media was used for preparation of any of the TILs described in the present application and Examples.

Definition Hg ram um micrometer uM micromolar AIM-V® free tissue culture medium (Thermo Fisher Scientific) BSC Biological Safety Cabinet CM1 Complete Medium #1 CM2 Complete Medium #2 CM3 te Medium #3 CM4 Complete Medium #4 1U or U International units ml milliliter mM olar NA not applicable PPE personal protective equipment Pre-REP pre-Rapid Expansion Process REP Rapid Expansion Process rh1L-2, IL-2 recombinant human Interleukin-2 40 Roswell Park Memorial Institute medium, formulation 1640 SOP Standard Operating Procedure TIL tumor ating lymphocytes Procedure 7.1 All procedures were done using sterile technique in a BSC (Class II, Type 7.1.1 e of hood was sprayed with 70% ethanol prior to its use. 7.1.2 All items and reagents were sprayed with 70% ethanol prior to placing them into tissue culture hood. 7.2 Aliquotting of 200mM L-glutamine 7.2.1 L-glutamine was supplied in larger s than needed for the preparation of serum (e. g., 100ml or 500ml volumes). 7.2.2 Thawed bottle of L-glutamine in 37°C water bath. 7.2.3 Mixed L-glutamine well after thawing, as it precipitates after thaw.

Ensure that all precipitates have returned to on prior to tting. 7.2.4 Placed 5-10ml aliquots of L-glutamine into sterile 15ml conical tubes. 7.2.5 Labeled tubes with concentration, vendor, lot number, date aliquotted, and expiration date. 7.2.6 Tubes were stored at —20°C and pulled as needed for media preparation. 7.3 Preparation of CMl 7.3.1 Removed the following reagents from cold storage and warmed them in a 37°C water bathe: 7.3.1.1 RPM11640 7.3.1.2 Human AB serum 3 200mM L-glutamine 7.3.2 Removed the BME from 4°C storage and place in tissue culture hood. 7.3.3 Placed the gentamycin stock solution from room temperature storage into tissue culture hood. 7.3.4 Prepared CMl medium according to Table 1 below by adding each of the ingredients into the top section of a 0.2pm filter unit riate to the volume that was filtered.

Table 11. Preparation of CMl Ingredient Final concentration Final Volume 500 ml Final Volume IL RPM11640 NA 450 ml 900 m1 Human AB serum, 50ml 100 ml heat-inactivated 10% 200mM L-glutamine 2mM 5 ml 10 ml 55mM BME SSuM 0.5 ml lml 50mg/ml gentamicin l 0.5 ml 1 ml sulfate 7.3.5 Labeled the CMI media bottle with its name, the initials of the er, the date it was filtered/prepared, the two week expiration date and stored at 4°C until needed for tissue culture. Media was aliquotted into smalled volume bottles as required. 7.3.6 Any remaining RPM11640, Human AB serum, or L-glutamine was stored at 4°C until next preparation of media. 7.3.7 Stock bottle of BME was ed to 4°C storage. 7.3.8 Stock bottle of gentamicin was returned to its proper RT e location. 7.3.9 Because of the limited buffering capacity of the medium, CMl was discarded no more than two weeks after preparation, or as the phenol red pH indicator showed an extreme shift in pH (bright red to pink coloration). 7.3.10 On the day of use, the required amount of CMl was warmed in a 37°C water bath and 6000 IU/ml IL-2 was added. 7.3.11 Additional supplementation - as was needed 7.3.11.1 CMl was supplemented with GlutaMAX® 7.3.11.1.1 CMl was prepared by substituting 2mM AXTM for 2mM glutamine (final tration, see Table 2.) When this was done, the media bottle was d adding “2mM GlutaMAX” to prevent confusion with the standard formulation of CM1. 7.3.11.2 CMl was supplemented with extra antibiotic/antimycotic 7.3.11.2.1 Some CMl formulations required additional antibiotic or antimycotic to prevent contamination of P TIL grown from certain tumor types. 7.3.11.2.2 Antibiotic/antimycotic was added to the final concentrations shown in Table 2 below. .2.3 When done, the media bottle was d by adding the name/s of the additional antibiotic/antimycotic to prevent confusion with the standard formulation of CM1.

Table 12. Additional supplementation of CM1, as was needed.

Supplement Stock concentration Final concentration GlutaMAXTm 200mM 1. 100 _ llin/streptomycin 10,000 U/ml : 100 U/ml penicillin penicillin 100 ug/ml ug/ml streptomycin streptomycin Amphotericin B 250ug/ml 1:100 2.5ug/ml 8.1 Preparation of CM2 8.1.1 Removed prepared CM1 from refrigerator or prepare fresh CM1 as per Example above. 8.1.2 d AIM-V® from refrigerator. 8.1.3 Prepared the amount of CM2 needed by mixing prepared CM1 with an equal volume of AIM—V® in a sterile media bottle. 8.1.4 Added 3000 IU/ml IL—2 to CM2 medium on the day of usage. 8.1.5 Made sufficient amount of CM2 with 3000 IU/ml IL-2 on the day of usage. 8.1.6 Labeled the CM2 media bottle with its name, the initials of the preparer, the date it was filtered/prepared, the two week expiration date and stored at 4°C until needed for tissue culture. Media was aliquotted into smalled volume bottles as required. 8.1.7 Returned any CM2 without IL—2 to the refrigerator where it was stored for up to two weeks, or until phenol red pH indicator showed an extreme shift in pH (bright red to pink coloration). 8.2 Preparation of CM3 8.2.1 Prepared CM3 on the day it was required for use. 8.2.2 CM3 was the same as AIM-V® medium, supplemented with 3000 IU/ml 1L-2 on the day of use. 8.2.3 Prepared an amount of CM3 sufficient to experimental needs by adding IL-2 stock solution ly to the bottle or bag of AIM-V.

Mixed well by gentle shaking. Labeled bottle with “3000 IU/ml IL—2” immediately after adding to the AIM-V. When there was excess CM3, it was stored in bottles at 4°C labeled with the media name, the initials of the preparer, the date the media was prepared, and its expiration date (7 days after preparation). 8.2.4 Discarded media supplemented with IL-2 after 7 days storage at 4°C. 8.3 ation of CM4 8.3.1 CM4 was the same as CM3, with the additional supplement of 2mM GlutaMAXTM (final concentration). 8.3.1.1 For every 1L of CM3, added 10ml of 200mM GlutaMAXTM. 8.3.2 ed an amount of CM4 sufficient to experimental needs by adding IL—2 stock solution and AXTM stock solution directly to the bottle or bag of AIM-V. Mixed well by gentle shaking. 8.3.3 Labeled bottle with “3000 IL/nil IL—2 and GlutaMAX” immediately after adding to the AIM-V. 8.3.4 If there was excess CM4, it was stored in bottles at 4°C labeled with the media name, “GlutaMAX”, the initials of the preparer, the date the media was prepared, and its expiration date (7 days after preparation). 8.3.5 Discarded media supplemented with IL—2 after 7 days storage at 4°C.

EXAMPLE 6: EVALUATION OF IRRADIATED ALLOGENEIC FEEDER CELLS FOR RAPID EXPANSION PROTOCOL OF LN-144 This Example describes a novel abbreviated procedure for qualifying individual lots of gamma—irradiated eral mononuclear cells (PBMCs, also known as MNC) for use as allogeneic feeder cells in the ary methods described herein.

Each irradiated MNC feeder lot was prepared from an individual donor. Each lot or donor was screened individually for its ability to expand TIL in the REP in the presence of purified anti-CD3 (clone OKT3) antibody and interleukin-2 (IL-2). In addition, each lot of feeder cells was tested without the addition of TIL to verify that the received dose of gamma radiation was sufficient to render them replication incompetent.

Definitions AOPI - Acridine / Propidum Iodide BSC - Biological Safety t CD3 - Cluster of Differentiation 3, surface marker protein for T-lymphocytes CF - Centrifugal Force CM1 - te Medium for T1L, #1 CM2 - Complete Medium for TIL, # CMO - ct Manufacturing Organization C02 — Carbon Dioxide EtOH - Ethyl Alcohol GMP — Good Manufacturing Practices Gy - Gray IL-2 — Interleukin 2 IU - International Units LN2— Liquid Nitrogen Mini-REP - Mini-Rapid Expansion ol ml - Milliliter MNC - Mononuclear Cells NA — Not Applicable OKT3 - MACS GMP CD3 pure (clone OKT3) dy PPE — Personal tive Equipment Pre-REP - Before Rapid Expansion Protocol QS — Quantum Satis; fill to this quantity REP - Rapid Expansion Protocol TIL - Tumor Infiltrating Lymphocytes T25 - 25cm2 tissue culture flask ug - Micrograms pl - Microliter Equipment, Software, Materials ] Equipment BSC (Biological Safety Cabinet) Liquid Nitrogen Freezer Temperature—controlled water bath Centrifuge with swinging bucket rotor fied tissue culture incubator Pipet Aid 2—20ul Pipettor —20011] Pipettor lOO—lOOOul Pipettor Automated Cell Counter Material 15ml conical centrifuge tubes, sterile 50ml l centrifuge tubes, sterile AIM V Medium CTS (Therapeutic Grade) Cell Counter Staining Solution 0 IL—2 0 MACS GMP CD3 pure (clone OKT3) antibody 0 Sterile, disposable serological pipets o Sterile, disposable transfer pipets o Sterile, pipet tips 0 24-well tissue culture plate 0 T25 flasks (Greiner #690175) 0 5.3.14. Zipper storage bags PROCEDURE Background Gamma-irradiated, growth-arrested MNC feeder cells were required for REP (Step D) of TIL expansion. Membrane receptors on the feeder MNCs bind to anti-CD3 (clone OKT3) antibody and crosslink to TIL in the REP (Step D) flask, ating the TIL to expand. Feeder lots were prepared from the leukapheresis of whole blood taken from individual donors. The leukapheresis product was subjected to centrifugation over Ficoll- Hypaque, washed, irradiated, and cryopreserved under GMP conditions.

It was important that patients who received TIL therapy not be infused with viable feeder cells as this can result in Versus-Host Disease (GVHD). Feeder cells were ore growth—arrested by dosing the cells with irradiation, which resulted in double strand DNA breaks and the loss of cell viability of the MNC cells upon reculture.

Evaluation Criteria and Experimental Set-Up Feeder lots were evaluated on two criteria: 1) their ability to expand TIL in ure old and 2) their replication incompetency.

Feeder lots were tested in mini-REP format utilizing two primary P TIL lines grown in upright T25 tissue culture flasks. Feeder lots were tested against two ct TIL lines, as each TIL line was unique in its ability to proliferate in response to tion in a REP. As a control, a lot of irradiated MNC feeder cells which was historically been shown to meet the criteria of 1) and 2): (1) their ability to expand TIL in co-culture >100-fold and (2) their replication incompetency was run alongside the test lots.

To ensure that all lots tested in a single experiment receive lent testing, sufficient stocks of the same pre—REP TIL lines were used to test all conditions and all feeder lots. For each lot of feeder cells tested, there was a total of six T25 flasks: o Pre-REP TIL line #1 (2 flasks) o Pre-REP Tll line #2 (2 flasks) o Feeder control (2 flasks) 0 NOTE: Flasks containing TIL lines #1 and #2 evaluated the ability of the feeder lot to expand TIL. The feeder control flasks evaluated the replication incompetence of the feeder lot.

Experimental Protocol Day -2/3, Thaw of TIL lines Prepared CM2 medium as per Example 5, P and REP Media Preparation.

Warmed CM2 in 37°C water bath. Prepared 40 ml of CM2 supplemented with 3000IU/ml IL- 2. Kept warm until use. Placed 20ml of pre-warmed CM2 without lL-2 into each of two 50ml conical tubes labeled with names of the TIL lines used. Removed the two designated pre-REP TIL lines from LN2 storage and transfer the vials to the tissue culture room. Recorded TIL line identification form. Thawed vials by placing them inside a sealed zipper storage bag in a 37°C water bath until a small amount of ice s. Sprayed or wiped thawed vials with 70% ethanol and transferred vials to BSC. Used a sterile er pipet to immediately transfer the contents of vial into the 20ml of CM2 in the prepared, labeled 50ml conical tube.

QS (filled to this ty) to 40ml using CM2 without IL-2 to wash cells. Centrifuged at 400 x CF for 5 minutes. Aspirated the supernatant and resuspended in 5ml warm CM2 supplemented with 3000 IU/ml IL-2. Removed small aliquot (20 ul) in duplicate for cell counting using an automated cell counter. Recorded the . While counting, placed the 50ml conical tube with TIL cells into a humidified 370C, 5% C02 tor, with the cap loosened to allow for gas ge. Determined cell concentration and dilute TIL to 1 x 106 cells/ml in CM2 supplemented with IL-2 at 3000 IU/ml. Cultured in 2ml/well of a 24-well tissue culture plate in as many wells as needed in a humidified 370C incubator until Day 0 of the mini-REP. ed the different TIL lines in separate 24-well tissue culture plates to avoid confusion and potential cross-contamination.

Day 0, initiate Mini-REP Prepared enough CM2 medium for the number of feeder lots to be tested. (e.g, for g 4 feeder lots at one time, prepare 800ml of CM2 medium). Aliquoted a portion of the CM2 prepared in Example 5 and supplemented it with 3000 IU/ml IL-2 for the culturing of the cells. (e.g., for testing 4 feeder lots at one time, prepare 500ml of CM2 medium with 3000 IU/ml IL-2). The remainder of the CM2 with no IL-2 was used for washing of cells as described below.

Prepared TIL 7.3.2.4.Working with each TIL line tely to prevent cross-contamination, the 24- well plate with TIL culture was d from the incubator and transferred to the B SC. 7.3.2.5. Using a sterile transfer pipet or 100-1000u1 Pipettor and tip, removed about 1ml of medium from each well of TIL to be used and placed in an unused well of the 24-well tissue culture plate. This was used for g wells. 7.3.2.6. Using a fresh sterile transfer pipet or 100-1000ul Pipettor and tip, mixed remaining medium with TIL in wells to resuspend the cells and then transferred the cell suspension to a 50ml conical tube labeled with the TIL name and recorded the volume. 7.3.2.7. Washed the wells with the reserved media and transferred that volume to the same 50ml conical tube. 7.3.2.8. Spun the cells at 400 x CF to collect the cell pellet. 7.3.2.9. Aspirated off the media supernatant and resuspended the cell pellet in 2-5ml of CM2 medium ning 3000 IU/ml IL-2, volume used was based on the number of wells harvested and the size of the pellet — volume was sufficient to ensure a concentration of >1 .3 x 106 cells/ml. 7.3.2.10. Using a serological pipet, mixed the cell suspension thoroughly and recorded the volume. 7.3.2.11. Removed 200 pl for a cell count using an automated cell counter. 7.3.2.12. While counting, the 50ml l tube with TIL cells was placed into a fied, 5% C02, 37°C incubator, with the cap loosened to allow gas exchange. 7.3.2.13. Recorded the counts. 7.3.2.14. Removed the 50ml l tube containing the TIL cells from the incubator and resuspended them cells at a concentration of 1.3 x106 cells/ml in warm CM2 supplemented with 30001U/ml IL-2. Returned the 50ml conical tube to the incubator with a ed cap. 7.3.2.15 When needed, the original 24—well plate was kept to reculture any residual TIL. 7.3.2.16. Repeated steps 7.3.2.4 - 7.3.2.15 for the second TIL line. 7.3.2.17. Just prior to plating the TIL into the T25 flasks for the experiment, TIL were diluted 1:10 for a final concentration of 1.3 x 105 cells/ml as per step 7.3.2.35 below.

Prepare MACS GMP CD3 pure {OKT3 2 working solution 7.3.2.18. Took out stock solution of OKT3 (1mg/ml) from 4°C refrigerator and placed in 7.3.2.19. A final concentration of l OKT3 was used in the media of the mini-REP. 7.3.2.20. 600ng of OKT3 were needed for 20ml in each T25 flask of the experiment; this is the equivalent of 60111 of a 10pg/ml on for each 20ml, or 360pl for all 6 flasks tested for each feeder lot. 7.3.2.21. For each feeder lot tested, 400ul of a 1:100 dilution of 1mg/ml OKT3 was made for a g concentration of 10ug/ml (e.g., for testing 4 feeder lots at one time, made 1600ul ofa 1:100 dilution of 1mg/ml OKT3: l6ul of 1mg/ml OKT3 + 1.584ml of CM2 medium with 3000IU/ml IL-2.) Prepare T25 flasks 7.3.2.22. Labeled each flask with the name of the TIL line tested, flask replicate , feeder lot number, date, and initials of analyst. 7.3.2.23. Filled flask with the CM2 medium prior to preparing the feeder cells. 7.3.2.24. Placed flasks into 37°C humidified 5% CO2 incubator to keep media warm while waiting to add the ing components. 7.3.2.25. Once feeder cells were prepared, the components were added to the CM2 in each flask as shown in Table 14, Flask Set-up, below.

CM2 + 3000 IU/ml IL-2 VINC: 1.3 X 107/1111 in CM2 + 3000IU IL-Z (final concentration 1.3 X 107/flask OKT3: lOug/ml in CM2 + 3000IU IL-Z TIL: 1.3 X lOS/ml in CM2 with 30001U of IL-2 (final concentration 1 _3 X l k) Prepared Feeder Cells 7.3.2.26. A minimum of 78 X 106 feeder cells were needed per lot tested for this protocol.

Each lml vial frozen by SDBB had 100 X 106 viable cells upon freezing.

Assuming a 50% recovery upon thaw from LN2 storage, it was recommended to thaw at least two lml vials of feeder cells per lot giving an estimated 100 X 106 viable cells for each REP. Alternately, if supplied in 1.8ml vials, only one vial would provide enough feeder cells 7.3.2.27. Before thawing feeder cells, rmed approximately 50ml of CM2 t 1L-2 for each feeder lot to be tested. 7.3.2.28. Removed the designated feeder lot vials from LN2 storage, placed in zipper storage bag, and place on ice. Transferred vials to tissue culture room. 7.3.2.29. Thawed vials inside closed zipper storage bag by immersing in a 37°C water bath. 7.3.2.30. Removed vials from zipper bag, spray or wipe with 70% EtOH and transferred vials to BSC. 7.3.2.31. Using a transfer pipet, the contents of feeder vials were immediately transferred into 30ml of warm CM2 in a 50ml conical tube. Washed vial with a small volume of CM2 to remove any residual cells in the vial. 7.3.2.32. Centrifuged at 400 X CF for 5 minutes. 7.3.2.33. Aspirated the supernatant and resuspended in 4ml warm CM2 plus 3000 IU/ml 1L-2. 7.3.2.34. Removed 200 pl for cell ng using the Automated Cell Counter. Record the counts. 7.3.2.35. Resuspended cells at 1.3 X 107cells/ml in warm CM2 plus 3000 IU/ml lL-2.

Setup ture 7.3.2.36. Diluted TIL cells from 1.3 X 106 cells/ml to 1.3 X 105 cells/ml. Worked with each TIL line independently to prevent contamination. 732.36.]. Added 45ml of CM2 medium to a 15ml conical tube. 7.3.2.36.2. Removed TIL cells from incubator and resuspended well using a 10ml serological pipet. 7.3.2.363. Removed 0.5ml of cells from the 1.3 X 106 cells/ml TIL suspension and add to the 4.5ml of medium in the 15ml conical tube. ed TIL stock vial to incubator. 7.3.2.364. Mixed well. 7.3.2.365. Repeated steps 7.3.2.361— 364 for the second TIL line. 7.3 2.36.6. When testing more than one feeder lot at one time, d the TIL to the lower concentration for each feeder lot just prior to plating the TIL. 7.3.2.37. erred flasks with pre-warmed media for a single feeder lot from the tor to the BSC. 7.3.2.38. Mixed feeder cells by pipetting up and down several times with a 1ml pipet tip and er 1 ml (1.3 X 107 cells) to each flask for that feeder lot. 7.3.2.39. Added 60ul of OKT3 g stock (10ug/ml) to each flask. 7.3.2.40. Returned the two control flasks to the incubator. 7.3.2.41. Transferred 1 ml (1.3 X 105) of each TIL lot to the correspondingly labeled T25 flask. 7.3.2.42. Returned flasks to the incubator and incubated upright. Did not disturb until Day 7.3.2.43. Repeated 7.3.2.36 — 7.3.2.42 for all feeder lots tested. 7.3.3. Day 5: Media changed 7.3.3.1. Prepared CM2 with 3000 IU/ml IL-2. 10ml is needed for each flask 7.3.3.2. To prevent contamination, handled the flasks for a single feeder lot at a time. Removed flasks from the incubator and transferred to the BSC, and care was taken not to disturb the cell layer on the bottom of the flask. 7.3.3.3. Gently removed 10ml of the media from flask and discarded. 7.3.3.4. Repeated for all flasks including l flask. 7.3.3.5. With a 10ml pipette, transferred 10ml warm CM2 with 3000 IU/ml IL-2 to each flask. 7.3.3.6. Returned flasks to the incubator and incubate upright until Day 7. 7.3.3.7.

Repeat 7.3.3.1 - 7.3.3.6 for all feeder lots tested. 7.3.4. Day 7: Harvest 7.3.4.1. To prevent cross-contamination, d the flasks for a single feeder lot at a t1me. 7.3.4.2. Removed flasks from the incubator and transferred to the BSC, and care was taken not to disturb the cell layer on the bottom of the flask. 7.3.4.3. Without disturbing the cells growing on the bottom of the flasks, removed 10ml of medium from each test flask and 15ml of medium from each of the control flasks. 7.3.4.4. Using a 10ml serological pipet, resuspended the cells in the remaining medium and mixed well to break up any clumps of cells. 7.3.4.5. Recorded the volumes for each flask in Day 7. 7.3.4.6. After thoroughly mixing cell suspension by pipetting, removed 200 pl for cell counting. 7.3.4.7. Counted the TIL using the appropriate standard operating ure in conjunction with the automatic cell counter equipment. 7.3.4.8. Recorded counts for Day 7. 7.3.4.9. Repeated 7.3.4.1 — 7.3.4.8 for all feeder lots tested. 7.3.4.10. Feeder l flasks were evaluated for replication incompetence and flasks containing TIL were evaluated for fold expansion from Day 0 according to the criteria listed in Figure 2. 7.3.5. Day 7 : uation of Feeder Control Flasks to Day 14 7.3.5.1. After completing the Day 7 counts of the feeder control flasks, added 15ml of fresh CM2 medium containing 3000 IU/ml IL-2 to each of the control flasks. 7.3.5.2. Returned the control flasks to the incubator and incubated in an upright position until Day 14. 7.3.6. Day 14 Extended Non-proliferation of Feeder Control Flasks 7.3.6.1 To t cross-contamination, d the flasks for a single feeder lot at a time. 73.6.2 Removed flasks from the incubator and transferred to the BSC, and care was taken not to disturb the cell layer on the bottom of the flask. 7.3.6.3. Without disturbing the cells growing on the bottom of the flasks, removed approximately 17ml of medium from each control flasks. 7.3.6.4. Using a 5ml serological pipet, resuspended the cells in the remaining medium and mixed well to break up any clumps of cells. 7.3.6.5. ed the volumes for each flask. 7.3.6.6. After thoroughly mixing cell suspension by pipetting, removed 200ul for cell counting. 7.3.6.7. Counted the TIL using the appropriate standard operating procedure in conjunction with the automatic cell counter equipment 7.3.6.8. Recorded counts for Day 14. 7.3.6.9. ed 7.3.4.1 — 7.3.4.8 for all feeder lots .

Expected Results and Acceptance ia Expected Results The dose of gamma irradiation was sufficient to render the feeder cells replication incompetent. All lots were expected to meet the evaluation criteria and also trated a ion in the total viable number of feeder cells remaining on Day 7 of the REP culture compared to Day 0.

All feeder lots were expected to meet the evaluation criteria of lOO-fold ion of TIL growth by Day 7 of the REP culture.

Day 14 counts of Feeder Control flasks were expected to continue the non— proliferative trend seen on Day 7.

Acceptance criteria ] The following acceptance criteria had to be met for each replicate TIL line tested for each lot of feeder cells.

Acceptance was two-fold: as follows [outlined in Figure 2: Acceptance Criteria): WO 81473 Whether the dose of radiation was sufficient to render the MNC feeder cells replication incompetent when cultured in the presence of 30ng/ml OKT3 antibody and 3000 IU/ml [L-Z was evaluated, Replication incompetence was evaluated by total viable cell count (TVC) as determined by automated cell counting on Day 7 and Day 14 of the REP.

Acceptance criteria is “No Growth,” g the total viable cell number had not sed on Day 7 and Day 14 from the initial viable cell number put into culture on Day 0 of the REP. te the ability of the feeder cells to support TIL expansion.

TIL growth was ed in terms of fold expansion of viable cells from the onset of culture on Day 0 of the REP to Day 7 of the REP.

On Day 7, TIL cultures achieved a minimum of lOO-fold ion, (i.e., greater than 100 times the number of total viable TIL cells put into culture on REP Day 0), as evaluated by automated cell counting.

MNC feeder lots that did not meet these two criteria above were typically excluded.

Any MNC feeder lots that meet acceptance criteria but are judged to have poor mance in regard to the ability to expand TIL relative to other previous feeder lots tested in parallel with the same pre-REP TIL lines, as judged by those of skill in the art could have been excluded. See Table 15 below for acceptance criteria used.

Table 14 ce ntance Criteria 0 growth observed at 7 and 14 days At least a lOO-fold expansion of each TIL TIL eXpanswn. (minimum of 1.3 x 107 viable cells) r the dose of radiation was sufficient to render the MNC feeder cells replication incompetent when cultured in the presence of 30ng/ml OKT3 antibody and 3000 IU/ml lL—2 was evaluated. .2.2.1.1 Replication incompetence was evaluated by total viable cell count (TVC) as determined by automated cell counting on Day 7 and Day 14 of the .1.2 Acceptance criteria was “No Growth,” meaning the total viable cell number was not increased on Day 7 and Day 14 from the initial viable cell number put into culture on Day 0 of the REP. .2.2.2 The ability of the feeder cells to t TIL expansion was evaluated. .2.2.2.1 TIL growth was measured in terms of fold ion of viable cells from the onset of culture on Day 0 of the REP to Day 7 of the REP. .2.2.2.1 On Day 7, TIL es achieved a minimum of 100-fold expansion, (i.e., greater than 100 times the number of total viable TIL cells put into culture on REP Day 0), as evaluated by automated cell counting. .2.2.3 When a lot failed to meet the two criteria above, the lot was retested according to the contingency plan outlined in Section 10.3 below. .2.2.4 Following retesting of a failed lot, any MNC feeder lot that did not meet the two ance criteria in both the original evaluation and the contingency testing was excluded. .2.2.5 Any MNC feeder lots that met acceptance criteria but were judged to have poor performance in regard to the ability to expand TIL relative to other previous feeder lots tested in parallel with the same pre-REP TIL lines were excluded as appropriate.

Contingency Testing ofMNC Feeder Lots that do not meet acceptance criteria .3.1 In the event that an MNC feeder lot met either of the acceptance ia outlined in Section 10.2 above, the following steps were taken to retest the lot to rule out simple experimenter error as its cause. .3.2 If there were two or more remaining satellite testing vials of the lot, then the lot could be retested. If there were one or no remaining satellite testing vials of the lot, then the lot was failed according to the acceptance criteria listed in n 10.2 above. .3.3 Two trained personnel, include the original person who evaluated the lot in question, had to both test the lot at the same time. .3.4 Repeating Section 7.2 — 7.3 was done to luate the lot in question. .3.5 Each person would test the lot in question as well as a control lot (as defined in Section 7.2.4 above). .3.6 In order to be ied, the lot in question and the control lot had to e the acceptance criteria of Section 10.2 for both of the personnel doing the contingency testing. .3.7 Upon meeting these criteria, the lot could then be ed for CMO use as outlined in Section 10.2 above.

EXAMPLE 7: PROCEDURE FOR QUALIFYING DUAL LOTS OF GAMMA- IRRADIATED PERIPHERAL BLOOD MONONUCLEAR CELLS This Example describes a novel abbreviated procedure for qualifying individual lots of gamma-irradiated peripheral blood mononuclear cells (PBMC) for use as allogeneic feeder cells in the exemplary methods described herein. This example provides a protocol for the evaluation of irradiated PBMC cell lots for use in the tion of clinical lots of TIL. Each irradiated PBMC lot was prepared from an individual donor. Over the course of more than 100 cation protocols, it has been shown that, in all cases, irradiated PBMC lots from SDBB (San Diego Blood Bank) can expand TILs >100—fold on Day 7 of a REP. This modified qualification protocol is intended to apply to ated donor PBMC lots from SDBB which must still be tested to verify that the ed dose of gamma radiation was sufficient to render them replication incompetent. Once demonstrated that they maintain replication incompetence over the course of 14 days, donor PBMC lots were considered “qualified” for usage to produce clinical lots of TIL.

Key Terms and ions pg — Microgram ul — Microliter AIM-V — cially available cell culture medium Biological Safety Cabinet BSC — Cluster of entiation CD — Complete Medium for TIL #2 CMZ — CM2 supplemented with 3000 IU/ml 1L—2 CMZILZ — Contract Manufacturing Organization C02 — Carbon Dioxide EtOH — Ethanol GMP — Good Manufacturing Practices Gy — Gray IL — eukin IU — International Units LN2 7 Liquid Nitrogen MI — Milliliter NA — Not Applicable OKT3 — anti-CD3 monoclonal antibody designation P20 — 2-20pl pipettor P200 — 20—20mm pipettor PBMC — peripheral blood mononuclear cells P1000 — lOO-lOOOul pipettor PPE — al Protective Equipment REP 7 Rapid Expansion Protocol SDBB — San Diego Blood Bank TIL — Tumor Infiltrating Lymphocytes T25 — 25cm2 tissue culture flask WO 81473 x g — “times gravity” — measure of ve centrifugal force ] Specimens included Irradiated donor PBMC (SDBB).

Procedure 7.1.1 Gamma-irradiated, growth-arrested PBMC were required for current standard REP of TIL. ne receptors on the PBMCs bind to anti-CD3 (clone OKT3) antibody and crosslink to TIL in culture, stimulating the TIL to expand. PBMC lots were prepared from the leukapheresis of whole blood taken from individual donors. The leukapheresis product was subjected to fugation over Ficoll-Hypaque, washed, irradiated, and cryopreserved under GMP conditions.

It is important that patients who receive TIL therapy not be infused with viable PBMCs as this can result in Graft—Versus—Host Disease (GVHD). Donor PBMCs were ore growth-arrested by dosing the cells with gamma- ation, resulting in double strand DNA breaks and the loss of cell viability of the PBMCs upon reculture.

Evaluation Criteria 7.2.1 Evaluation criterion for irradiated PBMC lots was their replication incompetency.

Experimental Set-up 7.3.1 Feeder lots were tested in mini—REP format as if they were to be co—cultured with TIL, using upright T25 tissue culture flasks. 7.3.1.1 Control lot: One lot of irradiated PBMCs, which had historically been shown to meet the criterion of 7.2. 1, was run alongside the experimental lots as a control. 7.3 .2 For each lot of irradiated donor PBMC tested, duplicate flasks were run.

Experimental Protocol All tissue culture work in this protocol was done using sterile technique in a Day 0 7.4.1 Prepared ~90ml of CM2 medium for each lot of donor PBMC to be tested.

Kept CM2 warm in 37°C water bath. 7.4.2 Thawed an aliquot of6 x 106 IU/ml IL-2. 7.4.3 Returned the CM2 medium to the BSC, wiping with 70% EtOH prior to placing in hood. For each lot ofPBMC tested, about 60ml of CM2 was removed to a separate sterile bottle. Added IL—2 from the thawed 6 x 106 IU/ml stock solution to this medium for a final concentration of 3000 IU/ml.

Labeled this bottle as “CM2/ILZ” (or similar) to distinguish it from the unsupplemented CMZ. 7.4.4 Labeled two T25 flasks for each lot of PBMC to be tested. Minimal label included: 7.4.4.1 Lot number 2 Flask number (1 or 2) 3 Date of initiation of culture (Day 0) ed OKT3 7.4.5 Took out the stock solution of anti-CD3 (OKT3) from the 4°C refrigerator and placed in the BSC. 7.4.6 A final concentration of l OKT3 was used in the media of the mini— 7.4.7 Prepared a lOug/ml working solution of anti-CD3 (OKT3) from the lmg/ml stock solution. Placed in refrigerator until needed. 7.4.7.1 For each PBMC lot tested, prepared 150 pl of a 1:100 dilution of the anti-CD3 (OKT3) stock.

E. g., for testing 4 PBMC lots at one time, prepared 600111 of 10ug/ml anti—CD3 (OKT3) by adding 6111 of the 1mg/ml stock solution to 594 pl of CM2 supplemented with 3000 IU/ml IL-2.

Prepared Flasks 7.4.8 Added 19ml per flask of CM2/IL-2 to the labeled T25 flasks and place flasks into 37°C, humidified, 5% C02 incubator while preparing cells.

Prepared Irradiated PBMC 7.4.9 Worked with each donor PBMC lot individually to avoid the potential cross- contamination of the lots. 7.4.10 Retrieved vials of PBMC lots to be tested from LN2 storage. These were placed at —80°C or kept on dry ice prior to thawing. 7.4.11 Placed 30ml of CMZ (without IL-Z supplement) into 50ml conical tubes for each lot to be thawed. Labeled each tube with the different lot numbers of the PBMC to be thawed. Capped tubes tightly and place in 37°C water bath prior to use. As , returned 50ml conical tubes to the BSC, wiping with 70% EtOH prior to placing in the hood. 7.4.12 Removed a vial PBMC from cold e and place in a floating tube rack in a 37°C water bath to thaw. Allowed thaw to proceed until a small amount of ice remains in the vial. 7.4.13 Sprayed or wiped thawed vial with 70% EtOH and er to BSC. 7.4.14 Using a sterile er pipet, the contents of the vial were immediately transferred into the 30ml of CM2 in the 50ml conical tube. Removed about 1ml of medium from the tube to rinse the vial; returned rinse to the 50ml conical tube. Capped tightly and swirl gently to wash cells. 7.4.15 Centrifuged at 400 x g for 5min at room temperature. 7.4.16 Aspirated the supernatant and resuspended the cell pellet in 1ml of warm CM2/IL-2 using a 1000ul pipet tip. Alternatively, prior to adding medium, resuspended cell pellet by dragging capped tube along an empty tube rack.

After resuspending the cell pellet, bring volume to 4ml using CM2/IL-2 medium. Recorded volume. 7.4.17 Removed a small aliquot (e.g., 100ul) for cell counting using an automated cell counter. 7.4.17.1 Performed counts in duplicate according to the particular automated cell counter SOP. It was often necessary to perform a dilution of the PBMC prior to performing the cell counts. A recommended starting dilution was 1:10, but this could vary depending on the type of cell counter used. 7.4.17.2 Recorded the counts. 7418 Adjusted concentration of PBMC to 1.3 x 107 ml as per step 7.4.15.2 using -2 medium. Mixed well by gentle swirling or by gently aspirating -down using a serological pipet.

Set Up Culture Flasks 7.4.19 Returned two labeled T25 flasks to the BSC from the tissue culture incubator. 7.4.20 Returned the lOug/ml vial of anti-CD3/OKT3 to the BSC. 7.4.21 Added 1ml of the 1.3 x 107 PBMC cell suspension to each flask. 7.4.22 Added 60ul ofthe lOug/ml anti-CD3/OKT3 to each flask. 7.4.23 Returned capped flasks to the tissue culture incubators for 14 days of growth t disturbance. 7.4.24 The anti-CD3/OKT3 vial was placed back into the refrigerator until needed for the next lot. 7.4.25 Repeated steps 7.4.9 — 7.4.24 for each lot of PBMC to be evaluated.

Day 14, Measurement of Non-proliferation of PBMC 7.4.26 Working with each lot independently, carefully ed the ate T25 flasks to the BSC. 7.4.27 For each flask, using a fresh 10ml gical pipet, removed ~l7ml from each of the flasks, then carefully pulled up the remaining media to measure the volume remaining in the flasks. Recorded volume. 7.4.28 Mixed sample well by pipetting up and down using the same serological pipet. 7.4.29 d a 200ul sample from each flask for ng. 7.4.30 Counted cells using an automated cell counter. 7.4.31 Repeated steps 7.4.26 — 7.4.31 for each lot of PBMC being evaluated.

RESULTS AND ACCEPTANCE CRITERION Results WO 81473 .1.1 The dose of gamma irradiation was sufficient to render the feeder cells replication incompetent. All lots were expected to meet the evaluation criterion and demonstrated a reduction in the total viable number of feeder cells remaining on Day 14 of the REP culture ed to Day 0.

Acceptance Criterion .2.1 The following acceptance criterion was met for each irradiated donor PBMC lot tested: .2.2 “No growth” — meaning that the total number of viable cells on Day 14 was less than the initial viable cell number put into culture on Day 0 of the REP. .2.3 Should a lot fail to meet the criterion above, the lot was retested per the Contingency Testing ure outlined in the section 10.4. .2.4 Following retesting of a failed lot, any MNC feeder lot that did not meet the acceptance criterion in both the original evaluation and the gency testing was excluded.

Contingency Testing ofPBMC lots which did not meet acceptance criterion. .4.1 In the event than an irradiated donor PBMC lot did not meet the acceptance criterion above, the following steps were taken to retest the lot to rule out simple experimenter error as the cause of its failure. .4.2 If there were two or more remaining satellite vials of the lot, then the lot was ed. If there were one or no remaining ite vials of the lot, then the lot was failed according to the acceptance criterion of section 10.2 above. .4.3 Whenever possible, two trained personnel (preferably including the original person who evaluated the lot in on) did the testing of the two separate vials independently. This was the preferred method of contingency testing.

Aside from the separate vials of PBMC, the same reagents can be used by both .4.3.1. If two personnel were not available, one person did the testing of the two PBMC vials for the failed lot, working with each vial independently. .4.4 Repeating of section 7.4 imental Protocol” was done to re-evaluated the lot in question. .4.5 In addition to the lot in question, a control lot was tested by each person carrying out the contingency testing. .4.5.1 If two personnel perform contingency testing, both personnel tested the control lot ndently. .4.5.2 If only one person was available to perform contingency testing, it was not necessary for the control lot to be run in duplicate. .4.5.3 To be qualified, a PBMC lot going through contingency testing must have had both the control lot and both replicates of the lot in question e the ance criterion of n 10.2 to pass. .4.5.4 Upon meeting this criterion, the lot was then be released for CMO usage as outlined in section 10.2.

EXAMPLE 8: COMPARISON OF PRE- AND POST-CRYOPRESERVED TILS Antibody cocktails for the samples and the FMO ls were made before starting the sample preparation and staining ure. The cocktails were stored at 4°C in the dark for up to 60 days. See Cocktail Preparation section below.

Table 15: Stainin Procedure: Removed Aqua dye t from the freezerptdark.

Added 3mL lXPBS to each sample tube Spun tubes at 300g for 5 minutes.

Prepared Aqua Live/Dead stain. Dilute 1:200 in PBS. 25 uL per sample and FMO control tube is needed. 1:200 = LAuua+ mL PBS ted or decanted supernatant from step 3 Added 25uL of Aqua L/D to each sample tube. Resuspended cells by dragging along rack Incubated 15min, dark, room temperature.

Without washing, added SOpL of appropnate Ab cocktail to each tube Incubated tubes for 15 minutes at room temperature Added 3mLs ofFACS Wash buffer Spun at 330g for 5 min at 4°C.

Resuspended tubes by dragging along an empty tube rack.

Added 100“L 1% PFA/PBS solution at 4°C.

Stored samples at 4°C in dark for up to 72 hours.

Ran samples on Flow Cytometer Table 16: Differentiation Panel 1 DF1 : PE/Cy7 IP26 BioLegend 306720 Pcergl: HNK-l BioLegend 359622 PE CD282 BioLegend 302908 CD4 FITC OKT4 eBioscience 11 042 2 Beckman Coulter BioLegend Table 17: Differentiation Panel 2 DF2 CD45RA* PE-Cy7 H1100 560675 CD8a PerCP/Cy5.5 RPA-T8 BioLegend 301032 150503 BD Biosciences 560765 110048- OKT4 eBioscience ATP/CW BioLegend 300318 CD3 8* 113-7 end 356606 HLA-DR L243 BioLegend 3 0763 3 >“Denotes FMO (Fluorescence Minus One) control should be made.

Table 18: T cell Activation Panel 1 Tactl CD137* PE/C7 4B4-1 309818 - C5.5 RPA-T8 301032 - Lag3"< PE 3DS223H eBioscience 1242 CD4 FITC OKT4 BioLeend 317408 CD3 APC/C 7 HIT3a 300318 - EH122H7 329908 - BV421 F38—2E2 345008 - Table 19: T cell Activation Panel 2 (Tath) CD69* PE-C 7 FNSO Bioslzilznces CD8a PerCP/C 5.5 RPA-T8 BioLe_end TIGIT* PE MBSA43 eBioscience CD4 FITC OKT4 BioLe_end CD3 APC/C 7 HIT3a BioLe_end KLRG1* Ax647 SA231A2 BioLe_end CD154* BV421 TRAP1 B' ' 563886 tes FMO (Fluorescence M1nus One) control should be made.

Compensation Controls 1. Added one drop ofBD Comp beads to 11 tubes. 2. Labeled tubes 1 through 7 with the chromophores from DF1 3. d tubes 8 through ten with APCy7, BV421, and AX647. 4 Tube 11 was for unlabeled beads.

. Added 5 uL of Antibody to each tube. 6. Incubated 10 to 30 minutes in dark, room temperature. 7. Washed with 3mLs FACS Buffer 8. Resuspended with SOOuL 1% PFA. 9. Added one drop ofBD Comp negative bead to each tube.

. Stored at 4°C in dark. Could be used for one week.

Aqua l: 1. Added one drop of Arc positive control to tube labelled Aqua. 2. Added 3 uL of thawed aqua solution to tube. 3. Repeated steps 6 — 10 as above. Except used the negative Arc bead for step 9.

Table 20: Setup. 2 CyS .5 ———3 U‘IUILI‘I lkl‘l ———kl‘lkl‘lU‘IUI EXAMPLE 9: REMARKABLY STABLE TUMOR-INFILTRATING LYMPHOCYTES (TIL) FOR INFUSION PHENOTYPE FOLLOWING CRYOPRESERVATION Abstract Background: This Example discusses the development of cancer immunotherapies based on tumor-infiltrating lymphocytes (TIL) with the ultimate goal of developing therapeutic tions of TILs. Cryopreservation of TILs allows the final cell product to be shipped in a safe manner with fewer temporal constraints (Axelsson S, Faresjo M, Hedman M, sson J, Casas R: Cryopreserved peripheral blood mononuclear cells are suitable for the assessment of immunological markers in type 1 diabetic children. Cryobiology 2008, —8.) Here, fresh versus frozen/thawed TIL samples were evaluated for the expression of individual phenotypic markers to assess whether phenotypic changes occur with cryopreserved TILs. (See, for example, Sadeghi A, Ullenhag G, us G, T6tterman TH, Eriksson F: Rapid expansion of T cells: Effects of culture and cryopreservation and ance of short-term cell recovery. Acta Oncol. 2013,52z978-86.) Results: ] No significant differences in CD4, CD8, NK, TCROLB expression, or memory markers comparing fresh versus thawed TIL were observed. The activation status of TIL as defined by HLA-DR, CD38, and CD69 expression was maintained while regulatory molecules LAG-3 and TIM-3 demonstrated a slight decrease in expression. In on, the viability of both the fresh and thawed product was greater than 86%.

Methods: PreREP TILs were obtained by culturing melanoma tumor fragments in IL-2 (6000 IU/ml).

Rapid Expansion Protocol (REP) cells were initiated using irradiated allogeneic PBMC feeder cells with OKT3 and IL-2 in a GREX-lOO flask for 11-14 days.

Cultured cells were cryopreserved in 5% DMSO.

Flow cytometric evaluation of fresh and thawed TIL ing rest for 1 to 2 hours in IL-2 was performed using four panels consisting of e, differentiation, activation, and tory markers.

Conclusion: Cryopreservation did not affect the measured ypic characteristics of TIL, with the exception of modest changes in some regulatory molecules. We are investigating the possibility of using cryopreserved TIL in a clinical setting.

EXAMPLE 10: MEMORY CELL SUBSETS IN FRESH VERSUS REREP TIL POPULATIONS In us experiments, no central memory subset was seen with fresh TIL populations (see, Figure 8). However, after the ReREP nearly 60% central memory cells, as provided in Table 22 below.

Based on the raw numbers, the rested cells had a slightly higher CD4 population than the not rested. Overall the CD8 percentage was high as expected. It’s roughly a 60/40 split for CM (central memory—Q3)/EM (effector memory—Q4) among the CD8s. The CD8+CD28+ expression looks interesting. The rested cells have a higher amount. See also, Figure 9 and lOA—lOB. See, also Figure 15.

EXAMPLE 11: ADMINISTRATION OF GOUS TUMOR RATING LYMPHOCYTES (TILS) IN MELANOMA PATIENTS ] Administration of autologous tumor infiltrating lymphocytes (TILS) in melanoma patients has shown an overall se of 55% at NCI, 38% at Moffitt Cancer Center, 48% at MD Anderson Cancer Center, and 40% in Sheba at the Ella Cancer Institute, Israel. The durable responses observed in melanoma patients using ACT may permit broader application to other solid tumors. As shown herein, the feasibility of growing TILs and developing TIL therapies for other solid tumors is demonstrated. The example provides data g “Successful expansion and characterization of tumor ating lymphocytes (TILs) from non-melanoma tumors”, see, Figures 12-14.

] Phenotypic characterization of TILs from bladder, al, and lung cancer were greater than 60-70% CD8+ T-cells whereas TILs from head and demonstrated variable distribution of CD8+ and CD4+ T-cells. TILs ated from TNBC were greater than 80% CD4+ T-cells. Regardless of the tumors, most cultures had less than 20% CD56+ NK cells.

TILs were prepared by: a. Washing an obtained tumor in HBSS; b. Dicing the tumor into fragments (e.g., 2-3 mm3 fragments); c. Placing the tumor fragments in G-REX 10 cell culture flasks with medium containing serum and IL-2, d. ging media on day 7 and every 4-5 days from day 11 until day 21, e. Assessing cell count, viability, and phenotyping followed by cryopreservation for future purposes including, but not limited to, future delivery to patients for the treatment of tumors, as described herein.

As demonstrated herein, TILs were grown from lung, bladder, head and neck, cervical, and TNBC patient tumors.

Moreover, as demonstrated herein, lung, bladder, and cervical tumors showed greater proportion of CD8+ TILs. Head and neck and TNBC tumors were mostly CD4+ TILs. In addition, further terization of CD4+ and CD8+ TILs demonstrated effector memory phenotypic cells that were also CD27+ and CD28+.

] The es set forth above are ed to give those of ordinary skill in the art a complete disclosure and description of how to make and use the embodiments of the compositions, systems and methods of the invention, and are not intended to limit the scope of what the inventors regard as their invention. Modifications of the above-described modes for carrying out the invention that are obvious to persons of skill in the art are intended to be within the scope of the following claims. All patents and publications mentioned in the specification are indicative of the levels of skill of those skilled in the art to which the invention pertains. All references cited in this disclosure are incorporated by reference to the same extent as if each reference had been incorporated by nce in its entirety individually.

All headings and section ations are used for clarity and reference purposes only and are not to be considered limiting in any way. For example, those of skill in the art will appreciate the ness of combining various s from different headings and sections as appropriate according to the spirit and scope of the invention described herein.

All references cited herein are hereby incorporated by reference herein in their entireties and for all purposes to the same extent as if each individual ation or patent or patent application was specifically and individually ted to be incorporated by reference in its entirety for all purposes.

Many modifications and variations of this application can be made without departing from its spirit and scope, as will be apparent to those skilled in the art. The specific embodiments and examples described herein are offered by way of example only, and the application is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which the claims are entitled.

Claims (29)

WHAT IS CLAIMED IS:

1. A method for ing tumor infiltrating lymphocytes (TILs) into a therapeutic population of TILs comprising: (i) ing a first population of TILs from a tumor resected from a patient; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs; and (iii) performing a second expansion by menting the cell culture medium of the second population of TILs with onal IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 100-fold greater in number than the second population of TILs, and wherein the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased ulation of effector T cells and/or central memory T cells relative to the second population of TILs.

2. The method according to claim 1, wherein the method further comprises: (iv) performing an additional second expansion by supplementing the cell culture medium of the third population of TILs with additional IL-2, additional OKT-3, and onal APCs, wherein the additional second expansion is performed for at least 14 days to obtain a larger therapeutic population of TILs than obtained in step (iii), wherein the larger therapeutic population of TILs comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the third population of TILs.

3. The method according to claim 2, n after step (iii), the cells are removed from the cell culture and cryopreserved in a storage medium prior to performing step (iv).

4. The method according to claim 3, wherein the cells are thawed prior to performing step (iv).

5. The method according to any of the ing claims, wherein step (iv) is repeated one to four times in order to obtain ient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

6. The method of according to any of the preceding claims, wherein steps (i) through (iii) or (iv) are performed within a period of about 40 days to about 50 days.

7. The method according to any of the preceding claims, n steps (i) through (iii) or (iv) are performed within a period of about 42 days to about 48 days.

8. The method according to any of the preceding , wherein steps (i) through (iii) or (iv) are med within a period of about 42 days to about 45 days.

9. The method according to any of the preceding claims, wherein steps (i) h (iii) or (iv) are performed within about 44 days.

10. The method according to any of the preceding claims, wherein the cells from steps (iii) or (iv) express CD4, CD8, and TCR α β at levels similar to freshly ted cells.

11. The method according to claim 1, wherein the antigen ting cells are peripheral blood mononuclear cells (PBMCs).

12. The method according to claim 11, wherein the PBMCs are added to the cell culture on any of days 9 through 17 in step (iii).

13. The method according to claims 2 to 12, n the effector T cells and/or central memory T cells in the therapeutic population of TILs in step (iv) exhibit one or more characteristics selected from the group consisting of expression of CD27, expression of CD28, longer telomeres, increased CD57 expression, and sed CD56 sion, ve to effector T cells and/or central memory T cells in the third population of cells.

14. The method according to claim 13, wherein the effector T cells and/or central memory T cells exhibit increased CD57 expression and decreased CD56 expression.

15. The method according to any of the preceding claims, wherein the APCs are artificial APCs (aAPCs).

16. The method according to any of the preceding claims, further comprising the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a high-affinity T cell receptor.

17. The method according to any of the preceding claims, further comprising the step of transducing the first population of TILs with an expression vector comprising a nucleic acid encoding a chimeric antigen receptor (CAR) comprising a single chain variable fragment antibody fused with at least one endodomain of a T-cell signaling molecule.

18. The method according to any of the preceding claims, wherein the therapeutic population of TILs are infused into a patient.

19. The method according to claim 1, wherein step (iii) further comprises a step of removing the cells from the cell culture medium.

20. The method according to claim 1, wherein step (iii) is ed one to four times in order to obtain sufficient TILs in the therapeutic population of TILs for a therapeutically effective dosage of the TILs.

21. The method according to claim 20, where the number of TILs sufficient for a therapeutically effective dosage is from about 2.3×1010 to about 13.7×1010.

22. A population of expanded TILs made according to the method of claim 1.

23. A population of expanded TILs made according to the method of claim 1, wherein the expanded TILs have at least a two-fold increase in basal glycolysis as compared to thawed cryopreserved TILs.

24. A method for assessing the metabolic activity of a TIL cell population made according to the method of claim 1, comprising measuring the basal glycolysis of the cells.

25. A method for expanding tumor rating cytes (TILs) into a therapeutic population of TILs comprising: (i) performing a first expansion by culturing a first population of TILs from a tumor resected from a patient in a cell culture medium comprising IL-2 to obtain a second population of TILs; and (ii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and n presenting cells (APCs) to obtain a third tion of TILs, wherein the third population of TILs is at least 100-fold greater in number than the second tion of TILs, and n the second expansion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic population of TILs which comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs.

26. A method for treating a subject with cancer comprising administering expanded tumor rating lymphocytes (TILs) comprising: (i) obtaining a first tion of TILs from a tumor resected from a patient; (ii) performing a first expansion by culturing the first tion of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs; (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs), to produce a third population of TILs, n the third population of TILs is at least 100-fold greater in number than the second population of TILs, and wherein the second ion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third tion of TILs is a therapeutic population of TILs which comprises an increased subpopulation of effector T cells and/or central memory T cells relative to the second population of TILs; and (iv) administering a therapeutically effective dosage of the third population of TILs to the patient.

27. A method for treating a subject with cancer comprising stering ed tumor infiltrating lymphocytes (TILs) comprising: (i) performing a first expansion by culturing a first population of TILs from a tumor resected from a patient in a cell culture medium comprising IL-2 to obtain a second population of TILs; (ii) ming a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen presenting cells (APCs) to obtain a third population of TILs, wherein the third population of TILs is at least 100-fold greater in number than the second population of TILs, and wherein the second ion is performed for at least 14 days in order to obtain the third population of TILs, wherein the third population of TILs is a therapeutic tion of TILs which comprises an increased subpopulation of effector T cells and/or l memory T cells relative to the second population of TILs; and (iii) administering a therapeutically effective dosage of the therapeutic tion of TILs to the patient.

28. A method for assaying TILs comprising: (i) obtaining a first population of TILs; (ii) performing a first expansion by culturing the first population of TILs in a cell culture medium comprising IL-2 to produce a second population of TILs; and (iii) performing a second expansion by supplementing the cell culture medium of the second population of TILs with additional IL-2, OKT-3, and antigen ting cells (APCs), to produce a third population of TILs, wherein the third population of TILs is at least 50-fold greater in number than the second population of TILs; (iv) harvesting, washing, and cryopreserving the third population of TILs; (v) storing the cryopreserved TILs at a nic temperature; (vi) thawing the third population of TILs to provide a thawed third population of TILs; and (vii) performing an additional second expansion of a portion of the thawed third population of TILs by supplementing the cell culture medium of the third population with IL-2, OKT-3, and APCs for a reREP period of at least 3 days, wherein the third expansion is performed to obtain a fourth population of TILs, n the number of TILs in the fourth population of TILs is compared to the number of TILs in the third population of TILs to obtain a ratio; (viii) determining based on the ratio in step (vii) whether the thawed population of TILs is le for administration to a patient; (ix) stering a therapeutically effective dosage of the thawed third population of TILs to the patient when the ratio of the number of TILs in the fourth population of TILs to the number of TILs in the third population of TILs is determined to be greater than 5:1 in step (viii).

29. A method for assaying TILs sing: (i) obtaining a portion of a first population of cryopreserved TILs; (ii) thawing the portion of the first population of eserved TILs; (iii) performing a first ion by culturing the portion of the first population of TILs in a cell culture medium comprising IL-2, OKT-3, and antigen presenting cells (APCs) for a reREP period of at least 3 days, to produce a second population of TILs, wherein the portion from the first population of TILs is compared to the second population of TILs to obtain a ratio of the number of TILs, wherein the ratio of the number of TILs in the second population of TILs to the number of TILs in the portion of the first population of TILs is greater than 5:1; (iv) determining based on the ratio in step (iii) whether the first population of TILs is suitable for use in therapeutic administration to a patient; and (v) therapeutically administering the der of the first population of TILs to the patient when the ratio of the number of TILs in the second population of TILs to the number of TILs in the first population of TILs is ined to be greater than 5:1 in step (iv). mN mN mHH i E Eaten. co=m_:E_Hmm._-Hmon H H H H m.NN wda DVD imHHmOH 3H mm: umiwmmaoru auspice. m? HNH 153 NH N.~ mm H H H md HmNN mdwm Hm.- EN 0de N unseen. Hmwimzhmon #4» 06 wam :HHHm 3 w: m§ME H H H H H 5.2”. mNH mdfi mdfim in 32 AEEVEEE EE “5 c0385m9 :38 E E m_m>_8>