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EP3347454A1 - Cellules tueuses naturelles (nk) groupées issues du sang de cordon ombilical associées à des anticorps et leurs utilisations pour le traitement d'une maladie - Google Patents

Cellules tueuses naturelles (nk) groupées issues du sang de cordon ombilical associées à des anticorps et leurs utilisations pour le traitement d'une maladie

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Publication number
EP3347454A1
EP3347454A1 EP16774876.3A EP16774876A EP3347454A1 EP 3347454 A1 EP3347454 A1 EP 3347454A1 EP 16774876 A EP16774876 A EP 16774876A EP 3347454 A1 EP3347454 A1 EP 3347454A1
Authority
EP
European Patent Office
Prior art keywords
cells
ucb
population
pooled
units
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP16774876.3A
Other languages
German (de)
English (en)
Inventor
Patrick HENNO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emercell Sas
Original Assignee
Emercell Sas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emercell Sas filed Critical Emercell Sas
Priority claimed from PCT/EP2016/071470 external-priority patent/WO2017042393A1/fr
Publication of EP3347454A1 publication Critical patent/EP3347454A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/46—Cellular immunotherapy
    • A61K39/461—Cellular immunotherapy characterised by the cell type used
    • A61K39/4613—Natural-killer cells [NK or NK-T]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/46—Cellular immunotherapy
    • A61K39/464—Cellular immunotherapy characterised by the antigen targeted or presented
    • A61K39/4643—Vertebrate antigens
    • A61K39/4644—Cancer antigens
    • A61K39/464402—Receptors, cell surface antigens or cell surface determinants
    • A61K39/464424—CD20
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2887—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against CD20
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
    • C07K16/3069—Reproductive system, e.g. ovaria, uterus, testes, prostate
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • C12N5/06—Animal cells or tissues; Human cells or tissues
    • C12N5/0602—Vertebrate cells
    • C12N5/0634—Cells from the blood or the immune system
    • C12N5/0646—Natural killers cells [NK], NKT cells
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
    • C07K2317/732—Antibody-dependent cellular cytotoxicity [ADCC]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value

Definitions

  • the invention relates to the field of cell therapy, particularly NK cell mediated therapy associated with antibodies.
  • the present invention is directed to methods and compositions for increasing the efficiency of therapeutic natural killer cells (NK cells) and/or antibodies, wherein said methods or compositions comprise the use of pooled NK cells from umbilical cord blood units (UCBs), preferably alloreactive NK cells, in combination with a therapeutic antibody in order to enhance the efficiency of the treatment in human subjects, in particularly through an increase in antibody-dependent cell-mediated cytotoxicity (ADCC) mechanism.
  • the present invention relates to said composition as a pharmaceutical composition, preferably for its use for the treatment of a disease in a human subject in need thereof, preferably wherein said disease is a cancer, infectious or immune disease.
  • the present invention is also directed to a method of treatment of a disease in a human subject in need thereof, comprising the administering to said subject said pooled NK cells from UCBs, preferably alloreactive, in combination with a therapeutic antibody which can be bound to said NK cells.
  • NK cell effector functions can be exploited for the treatment of some tumors through their ability to mediate ADCC.
  • NK cell recognition of an antibody-coated target cell particularly by recognizing the NK cell Fc receptor, CD 16 (FcyRIIIa), results in rapid NK cell activation and degranulation.
  • mAbs Monoclonal antibodies
  • Tumor-targeted mAbs that initiate NK cell ADCC have been used clinically.
  • CD20 such as Rituximab or Ublituximab
  • Her2/neu such as Trastuzumab or Pertuzumab
  • epidermal growth factor receptor EGFR
  • CD52 such as alemtuzumab
  • disaloganglioside GD2
  • NK Natural Killer
  • NK cell receptors and their ligands over the last two decades have shed light on the molecular mechanisms of NK cell activation by tumor cells.
  • MHC major histocompatibility complex
  • NK cells are responsible of the graft versus leukemia (GvL) effect with minimal
  • NK cell alloreactivity could have a large beneficial independently of NK cell source. Mismatched transplantation triggers alloreactivity mediated by NK cells, which is based upon "missing self recognition". Donor- versus- recipient NK cell alloreactions are generated between individuals who are mismatched for HLA-C allele groups, the HLA-Bw4 group and/or HLA-A3/11.
  • KIR ligand mismatching is a prerequisite for NK cell alloreactivity because in 20 donor-recipient pairs that were not KIR ligand mismatched in the graft-versus-host direction, no donor alloreactive NK clones were found.
  • HLA molecules self-identity molecules
  • NK cells Even if NK cells have a natural cytotoxic potential, their cytotoxic activity can be improved in vitro by different activation mechanisms, and most of these mechanisms are also able to amplify NK cells (with variable amplification factors) leading to more therapeutic cells, more efficient.
  • In vitro activation protocols include cytokines and growth factor use, such as IL-
  • IL-15 IL- 18, IL-21, SCF, Flt3-L
  • accessory cells such as peripheral blood mononuclear cells, tumoral cells or cell lines (see M. Villalba Gonzales et al., WO2009/141729).
  • accessory cells presenting a particular iKIR-HLA mismatch (4 major iKIR-HLA mismatch: HLA A3/A11 ; HLA Bw4; HLA CI ; HLA C2 and associated iKIR receptors).
  • Umbilical cord blood has been shown to be a good source of NK cells, with higher NK cells percentages and good in vivo expansion/activation (see M. Villalba Gonzales et al., WO2012/146702).
  • the depletion of cells bearing the antigen specifically recognized by the antibody can be mediated through the mechanism of ADCC, complement dependant lysis, and direct antitumor inhibition of tumor growth through signal given via the receptor targeted by the antibody.
  • rituximab alone or in combination with chemotherapy was shown to be effective in the treatment of certain Non-Hodgkin's Lymphoma (NHL) grades, a significant % of patients with low grade NHL can exhibit low clinical response using rituximab.
  • NDL Non-Hodgkin's Lymphoma
  • UCB unit can be used to provide the desired NK cells contained in one UCB unit . Nevertheless, and despite the possibility to amplify and activate the NK cells contained in one UCB unit with a good rate of amplification, it is will be desirable to provide these NK cells product, for clinical therapies, available, purity, with high expansion rates and activation state and exhibiting NK cells cytotoxic activity.
  • NK alloreactive natural killer
  • the Applicant succeeded in implementing a method allowing the enhance of the ADCC efficacy of a therapeutic antibody by combining said antibody with alloreactive human amplified and/or activated NK cells in which said amplified and/or activated NK cells have been obtained from a pooled UCB units.
  • the inventors demonstrate here that the efficiency of a therapeutic antibody can be greatly enhanced by the co- injection/administrating of selected, alloreactive amplifying/activating and pooling UCB NK cells from different donors and said therapeutic antibody.
  • the present invention relates to a pharmaceutical composition
  • a pharmaceutical composition comprising a therapeutic antibody, which can be bound by a natural killer cells (NK cells), preferably by a Fc receptor, and a population of natural killer cells (NK cells), preferably alloreactive NK cells, wherein said cells population is obtained by a method comprising the steps of:
  • n umbilical cord blood units (UCB units), or fraction thereof containing said NK cells, with n > 2, preferably 3 ⁇ n ⁇ 50;
  • said composition containing said therapeutic antibody and said NK cells population according to the present invention is a composition or a product as a combined preparation for simultaneous, separate or sequential use.
  • said therapeutic antibody of said composition according to the present invention is a monoclonal antibody or a fragment thereof capable to bind said NK cells Fc receptor, and wherein said monoclonal antibody, or fragment thereof, comprises at least the 6 complement determining regions (CDRs) of the heavy and the light chain of said antibody specific of the antigen of the subject cell which is desired to target.
  • CDRs complement determining regions
  • said NK cells Fc receptor of said composition according to the present invention is the FcyRIIIa receptor
  • said therapeutic antibody of said composition according to the present invention is an antibody whose mechanisms include NK cell- mediated ADCC, preferably selecting from the group consisting of an anti-CD20, an anti-Her2/neu, an anti-epidermal growth factor receptor (EGFR), and an anti- ganglioside GD2 antibody (anti-GD2).
  • NK cell- mediated ADCC preferably selecting from the group consisting of an anti-CD20, an anti-Her2/neu, an anti-epidermal growth factor receptor (EGFR), and an anti- ganglioside GD2 antibody (anti-GD2).
  • said therapeutic antibody of said composition according to the present invention is a human, humanized or chimeric antibody or a fragment thereof.
  • said therapeutic antibody of said composition according to the present invention is selected from the group of:
  • Cetuximab Futuximab, Imgatuzumab, Matuzumab, Necitumumab or Nimotuzumab;
  • therapeutic antibodies whose mechanisms include NK cell-mediated ADCC are well known by the skilled person and disclosed in the art, and is part of the present list of therapeutic antibodies and thus comprised in the present invention.
  • the therapeutic antibody is not coated at the surface of the NK cells before its administration.
  • the therapeutic antibody is binding at the surface of the NK cells via the binding between its Fc portion and the CD 16 receptor presents at the surface of the NK cells.
  • antibody or “antibodies” are used interchangeably in the broadest sense and include monoclonal antibodies (e.g., full length or intact monoclonal antibodies), polyclonal antibodies, multivalent antibodies or multispecific antibodies (e.g., bispecific antibodies so long as they exhibit the desired biological activity).
  • such molecule consists in a glycoprotein comprising at least two heavy (H) chains and two light (L) chains inter-connected by disulfide bonds.
  • Each heavy chain is comprised of a heavy chain variable region (or domain) (VH) and a heavy chain constant region.
  • the heavy chain constant region is comprised of three domains, CHI, CH2 and CH3.
  • Each light chain is comprised of a light chain variable region (VL) and a light chain constant region.
  • the light chain constant region is comprised of one domain, CL.
  • the VH and VL regions can be further subdivided into regions of hypervariability, termed complementarity determining regions (CDR), interspersed with regions that are more conserved, termed framework regions (FR).
  • CDR complementarity determining regions
  • Each VH and VL is composed of three CDRs and four FRs, arranged from amino- terminus to carboxy-terminus in the following order: FR1, CDR1, FR2, CDR2, FR3, CDR3, FR4.
  • the variable regions of the heavy and light chains contain a binding domain that interacts with an antigen.
  • the constant regions of the antibodies may mediate the binding of the immunoglobulin to host tissues or factors, including various cells of the immune system (e.g. effector cells) and the first component (Clq) of the classical complement system.
  • the heavy chains of immunoglobulins can be divided into three functional regions: the Fd region, the hinge region, and the Fc region (crystallizable fragment).
  • the Fd region comprises the VH and CHI domains and, in combination with the light chain, forms Fab - the antigen-binding fragment.
  • the Fc fragment is responsible for the immunoglobulin effector functions, which includes, for example, complement fixation and binding to cognate Fc receptors of effector cells.
  • the hinge region found in IgG,
  • IgA, and IgD immunoglobulin classes acts as a flexible spacer that allows the Fab portion to move freely in space relative to the Fc region.
  • Monoclonal Antibody is used in accordance with its ordinary meaning to denote an antibody obtained from a population of substantially homogeneous antibodies, i.e. the individual antibodies comprising the population are identical except for possible naturally occurring mutations that may be present in minor amounts.
  • a monoclonal antibody consists in a homogenous antibody resulting from the proliferation of a single clone of cells (e.g., hybridoma cells, eukaryotic host cells transfected with DNA encoding the homogenous antibody, prokaryotic host cells transformed with DNA encoding the homogenous antibody, etc.), and which is generally characterized by heavy chains of a single class and subclass, and light chains of a single type.
  • Monoclonal antibodies are highly specific, being directed against a single antigen. Furthermore, in contrast to polyclonal antibodies preparations that typically include different antibodies directed against different determinants, or epitope, each monoclonal antibody is directed against a single determinant on the antigen.
  • said cells population of NK cells is obtained by a method further comprising the step of: (c) depleting the T cells contained in the pool obtained in step (b); or
  • said cells population of NK cells is obtained by a method comprising the step of depleting the T cells contained in each of the n UCB units before the step (b) of pooling.
  • said cells population of NK cells is obtained by a method wherein said n UCB units when pooled present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells.
  • said cells population of NK cells is obtained by a method wherein said major HLA class I group is selected from the group consisting of HLA A3/A11 which is recognized by KIR3DL2, HLA Bw4, which recognized by KIR3DL1, HLA C group 1 which is recognized by KIR2DL2/3 and HLA C group 2 which is recognized by KIR2DL1.
  • said population of NK cells is obtained by a method comprising further a method of expanding said population of NK cells from cells contained in said n UCB units, and wherein, - optionally each UCB units has been preliminary and separately expanded for said NK cells before the step of pooling said at least n UCB units; and/or
  • said population of NK cells is an activated population of NK cells, obtained by a method further comprising a step of activating said population of NK cells.
  • said population of NK cells is an activated population of NK cells wherein:
  • each UCB units has been preliminary and separately expanded and activated for said NK cells before the step of pooling said at least n UCB units;
  • said population of NK cells is obtained by a method selected in the group of methods consisting of:
  • n UCB units or fraction thereof containing NK cells, with n > 2, preferably 3 ⁇ n ⁇ 50, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • step iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • v) for each of the UCB units obtained in the preceding step separately expand and, optionally, activate the NK cells contained in one UCB unit by contacting the NK cells contained in the UCB unit, or fraction thereof containing NK cells, in a suitable medium to produce said expanded population and, optionally, activated NK cells for each UCB unit, preferably during 3 to 28 days; and
  • nUCB units cells obtained in the preceding step UCB units, or fraction thereof containing NK cells pooling the nUCB units cells obtained in the preceding step UCB units, or fraction thereof containing NK cells, to produce a population of pooled expanded and, optionally, activated NK cells.
  • n UCB units or fraction thereof containing NK cells, with n > 2, preferably 3 ⁇ n ⁇ 50, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • step iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • NK cells contained in one UCB unit separately expand and, optionally, activate the NK cells contained in one UCB unit by contacting the NK cells contained in the UCB unit, or fraction thereof containing NK cells, in a suitable medium to produce said expanded population and, optionally, activated NK cells for each UCB unit, preferably during 3 to 28 days;
  • n UCB units or fraction thereof containing NK cells, with n > 2, preferably 3 ⁇ n ⁇ 50, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • step ii) optionally red cell-/erythrocytes-depleting each UCB unit; iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • n UCB units or fraction thereof containing NK cells, with n > 2, 3 ⁇ n ⁇ 50, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • each UCB unit ii) optionally red cell-/erythrocytes-depleting each UCB unit, preferably by density gradient separation, more preferably by Ficoll-Paque® density gradient separation, or by a step of freezing and thawing;
  • step iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • nUCB units cells obtained in the preceding step UCB units, or fraction thereof containing NK cells pooling the nUCB units cells obtained in the preceding step UCB units, or fraction thereof containing NK cells, to produce a population of pooled NK cells;
  • said population of activated NK cells is obtained by a method wherein, said suitable medium suitable to expand and to activate the NK cells comprised accessory cells and/or at least one suitable NK activated factor.
  • the present invention is also directed to a composition according to the present invention, for its use for the treatment or the prevention of a disease in a human subject in need thereof, preferably wherein said disease is a cancer, infectious or immune disease.
  • the present invention is also directed to a composition according to the present invention, for its use for the treatment or the prevention of a cancer wherein this cancer is selected from lymphoma B-CLL and NHL.
  • the present invention is also directed to a composition according to the present invention, for its use for the treatment or the prevention of a disease in a human subject in need thereof, wherein said therapeutic antibody and said alloreactive NK cells are administered into said subject simultaneously.
  • the present invention also relates to a method of treatment of a disease in a human subject in need thereof, comprising:
  • the present invention is directed to method of increasing ADCC in a subject receiving therapeutic antibody treatment, wherein said antibody can be bound by CD16 and said method comprises administering to said subject prior to, simultaneously or after the administration of said therapeutic antibody an amount of alloreactive NK cells sufficient to increase ADCC, and wherein said alloreactive NK cells are obtained ), wherein said NK cells population is obtained by a method comprising the steps of:
  • n umbilical cord blood units (UCB units), or fraction thereof containing said NK cells, with n > 2, preferably 3 ⁇ n ⁇ 50;
  • the pooled UCBs NK cells population is obtained by the preferred following methods or preferred embodiment as described below.
  • a method comprising the steps of:
  • n umbilical cord blood units (UCB units), or fraction thereof containing said NK cells, with n > 2, preferably 3 ⁇ n ⁇ 50;
  • 3 ⁇ n ⁇ 5 and 3 ⁇ n ⁇ 25 being the most preferred.
  • fraction of UCB unit containing said cells it is intended to designate a fraction of the UCB unit containing at least the population of cells or part of said population which is desired to be produced.
  • said method further comprising the step of:
  • step (c) depleting the T cells contained in the pool obtained in step (b).
  • said method comprises a step of depleting the T cells contained in each of the n UCB units before the step (b) of pooling.
  • the n UCB units which are pooled in step b) present the same pattern for major HLA class I groups genotype.
  • each UCB present in the pooled n UCB belongs to a HLA group which is recognized by the same inhibitory KIR.
  • KIR or “inhibitory KIR” has its general meaning in the art and includes but is not limited to KIR2DL1, KIR2DL2, KIR2DL3, KIR3DL1 and KIR3DL2.
  • the main/major inhibitory KIRs are KIR2DL1, KIR2DL2, KIR2DL3, KIR3DL1 and KIR3DL2.
  • KIR2DL1 recognizes HLA-C w4 and related, 'group2' alleles.
  • KIR2DL2 and KIR2DL3 recognize HLA-Cw3 and related, 'group 1 ' alleles.
  • KIR3DL1 is the receptor for HLA-B allotypes with Bw4 motifs.
  • KIR3DL2 is the receptor for HLA- A3/11.
  • said major HLA class I group is selected from the group consisting of HLA A3/A11 which is recognized by KIR3DL2, HLA Bw4, which recognized by KIR3DL1, HLA C group 1 which is recognized by KIR2DL2/3 and HLA C group 2 which is recognized by KIR2DL1.
  • a preferred source of UCB units are human UCB units.
  • said source is a source of frozen human
  • the method for producing an expanded population of cells from cells contained in n UCB units comprising the step of:
  • each UCB units has been preliminary and separately expanded for said cells before step A) ;
  • step (B) expanding the desired cells obtained from the population of cells obtained in step (A) in a suitable medium to produce said expanded population of desired cells.
  • the step (B) can be an optionally step in case of each UCB units has been preliminary and separately expanded for said cells before the step b) of pooling in step A).
  • the method for producing a population of differentiated cells from desired cells contained in n UCB units comprising the step of:
  • each UCB units has been preliminary and separately differentiated for said cells before step A);
  • the step (B) of differentiating can be an optionally step in case of each UCB units has been preliminary and separately differentiated for said cells before the step b) of pooling in step A).
  • the method for producing a population of cells containing activated natural killer (NK) cells comprising:
  • step A producing a population of cells containing activated NK cells from at least n UCB units, or fraction thereof containing said NK cells, by the method for producing a population of cells according to the present invention, optionally each UCB units has been preliminary and separately expanded for said NK cells before step A);
  • step (B) activating said NK cells obtained from the step (A) in a suitable medium to produce said population of cells containing activated NK cells;
  • the method for producing a population of expanded activated NK cells comprises:
  • step A producing a population of cells containing NK cells from at least n UCB units, or fraction thereof containing said NK cells, by the method for producing a population of cells according to the present invention, optionally each UCB units has been preliminary and separately expanded and activated for said NK cells before step A);
  • the method for producing a population of expanded, optionally, activated NK cells from n UCB units comprises the step of:
  • n UCB units or fraction thereof containing NK cells, with n > 2, preferably 2 ⁇ n ⁇ 100 or 3 ⁇ n ⁇ 50, more preferably 3 ⁇ n ⁇ 25, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • each UCB unit ii) optionally red cell-/erythrocytes-depleting each UCB unit, preferably by density gradient separation, more preferably by Ficoll-Paque® density gradient separation, by the Hetastarch (Hydroxyethyl Starch; HES) method, by using the PrepaCyte® CB device or by a step of freezing and thawing;
  • density gradient separation more preferably by Ficoll-Paque® density gradient separation
  • HES Hetastarch
  • step iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • v) for each of the UCB units obtained in the preceding step separately expand and, optionally, activate the NK cells contained in one UCB unit by contacting the NK cells contained in the UCB unit, or fraction thereof containing NK cells, in a suitable medium to produce said expanded population and, optionally, activated NK cells for each UCB unit, preferably during 3 to 28 days;
  • n UCB units cells obtained in the preceding step UCB units, or fraction thereof containing NK cells pooling the n UCB units cells obtained in the preceding step UCB units, or fraction thereof containing NK cells, to produce a population of pooled expanded and, optionally, activated NK cells.
  • the method of producing a population of expanded and, optionally, activated NK cells from n UCB units comprises the step of:
  • NK cells contained in one UCB unit separately expand and, optionally, activate the NK cells contained in one UCB unit by contacting the NK cells contained in the UCB unit, or fraction thereof containing NK cells, in a suitable medium to produce said expanded population and, optionally, activated NK cells for each UCB unit, preferably during 3 to 28 days;
  • step vi) of depleting the T cells contained in the pooled NK cells obtained after step v) is not an optionally step and is part of the claimed method.
  • step vi) of depleting the T cells contained in the pooled NK cells obtained after step v) is followed by a step of selecting the NK cells exhibiting the CD56+ biomarker, whether it is still desirable to eliminate remaining non-activated NK cells at this end of the process.
  • the method for producing a population of expanded and, optionally, activated NK cells from n UCB units comprises the step of:
  • n UCB units or fraction thereof containing NK cells, with n > 2, preferably 2 ⁇ n ⁇ 100 or 3 ⁇ n ⁇ 50, more preferably 3 ⁇ n ⁇ 25, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • each UCB unit ii) optionally red cell-/erythrocytes-depleting each UCB unit, preferably by density gradient separation, more preferably by Ficoll-Paque® density gradient separation, by the Hetastarch (Hydroxyethyl Starch; HES) method, by using the PrepaCyte® CB device or by a step of freezing and thawing;
  • density gradient separation more preferably by Ficoll-Paque® density gradient separation
  • HES Hetastarch
  • step iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • the method for producing a population of expanded, and, optionally, activated NK cells from n UCB units comprises the step of:
  • n UCB units or fraction thereof containing NK cells, with n > 2, preferably 2 ⁇ n ⁇ 100 or 3 ⁇ n ⁇ 50, more preferably 3 ⁇ n ⁇ 25, and wherein said at least n UCB units present the same pattern for major HLA class I groups genotype, preferably wherein each HLA group present in the pooled n UCB is recognized by the same major inhibitory KIR by NK cells;
  • each UCB unit ii) optionally red cell-/erythrocytes-depleting each UCB unit, preferably by density gradient separation, more preferably by Ficoll-Paque® density gradient separation, by the Hetastarch (Hydroxyethyl Starch; HES) method, by using the PrepaCyte® CB device or by a step of freezing and thawing;
  • density gradient separation more preferably by Ficoll-Paque® density gradient separation
  • HES Hetastarch
  • step iii) optionally, the population of cells obtained in step i) or ii) is frozen, kept in liquid nitrogen and thawed before step iv);
  • the amplification factor for NK cells after the expanding step(s) is at least 100, preferably, 200, 300 or 500 for an expanding/activation step(s) total duration comprised between 9 and 28 days.
  • activated/ expanded NK cells are particularly suitable for preparing activated NK cells, from pooled UCB units, with miss expression of one of the following KIRs: KIR2DL2 and KIR2DL3, KIR2DL1, KIR3DL1 and KIR3DL2. Consequently, in this case, the activated/expanded pooled NK cells as above prepared will be alloreactive toward cells from others which lack the corresponding KIR ligand and, conversely, will be tolerant of cells from another individual who has the same KIR ligands.
  • a collection, or a therapeutic cells bank of at least 2 different production lots, preferably 3, more preferably 4, of pooled activated/expanded NK-cells obtainable by a method for producing NK cells of the invention, or a collection of at least 2, 3 or 4 fractions of said production lots, and wherein each production lot exhibits a different miss expression of one of the major inhibitory KIRs, preferably selected from the group of KIR2DL2 and KIR2DL3, KIR2DL1, KIR3DL1 and KIR3DL2 inhibitory KIRs.
  • Such a collection of at least 2 different production lots, preferably 3, more preferably 4, of pooled activated/expanded NK-cells obtainable by a method for producing pooled activated/expanded NK-cells NK cells contained in the composition of the invention is comprised in the present invention.
  • said collection is a collection of storage containers comprises at least 2, 3 or 4 containers that each contains a pooled activated/expanded NK-cells, or fraction thereof, obtainable by a method for producing NK cells of the invention and exhibiting a particular miss expression of one of the major inhibitory KIRs.
  • one production lot, or fraction thereof which is needed in quantity for treating one patient, of the claimed collection can be used for transplantation in a patient in need thereof, preferably a patient exhibiting target cells that do not express the specific major KIR ligand which is recognized by the pooled activated/amplified NK cells production lot which will be transplanted.
  • HLA/KIRs genotyping/phenotyping of UCB/NK cells or patient target cells may be performed by any well-known standards methods.
  • said suitable medium suitable to expand and to activate the NK cells comprised accessory cells and/or at least one suitable NK activated factor.
  • said accessory cells are selected from the group of:
  • - mammals cells preferably human cell, more preferably from HLA-typed collection of cells and, optionally, irradiated cells, particularly gamma-, X- or UV- irradiated cells, gamma- irradiated cells being preferred;
  • said cells from HLA-typed collection of cells are from the PLH cell line, preferably selected from the group of ECACC N°. 88052047, IHW number 9047 and HOM-2, ID n°HC107505, IHW number 9005.
  • said accessory cell is a transformed mammal cell wherein the expression of one gene encoding for a KIR ligand has been inhibited and which further comprises the inhibition or the reduction of the MHC-I expression and/or the inhibition of the expression of the ERK5 gene.
  • the method for preparing such accessory cells is well known by the skilled person (see WO 2012/146702 published on
  • the inhibition or reduction of the MHC-I expression is said accessory cell may be performed by any method well known in the art.
  • said methods are exemplified in the international patent application publication WO2009141729A2.
  • said inhibition or reduction of MHC-I expression is performed by using inhibitor of beta-2-microglobulin gene expression.
  • said accessory cell will be presenting a negative ERK5 phenotype.
  • cell presenting a negative ERK5 phenotvpe means a cell having a reduction of at least 10%, preferably 25% to 90%, for example 25% to 50% or 50% to 75% in the level of expression or the quantity of ERK5 protein present in the cell, in particular in the mitochondrial fraction, compared with its level of expression.
  • the inhibition or reduction of the ERK5 gene expression is said cell may be performed by any method well known in the art.
  • said methods are exemplified in the international patent application publication WO2009141729A2.
  • said inhibition or reduction of gene ER 5 expression is performed by using inhibitor of ER 5 gene expression.
  • said accessory cells have been immortalized, preferably by Epstein Barr Virus (EBV) transformation.
  • EBV Epstein Barr Virus
  • said accessory cell will constitute a cell line that proliferate indefinitely in culture.
  • Methods for immortalizing cells are well known in the art, particularly using the "Epstein Barr virus” (“EBV”) process for immortalize human lymphocyte.
  • EBV Epstein Barr virus
  • said suitable medium comprised as suitable NK activated factor interleukin-2 (IL-2), IL-7 and/or IL- 12 and/or IL- 15, or with alpha- or beta- interferon, preferably human recombinant activated factor.
  • IL-2 NK activated factor interleukin-2
  • IL-7 IL-7 and/or IL- 12 and/or IL- 15, or with alpha- or beta- interferon, preferably human recombinant activated factor.
  • the activation can be carried out using the following possible medium containing NK cells activating factor:
  • DO-9 low molecular heparin + mix of cytokines (strong concentration) SCF, Flt3L, TPO, IL-7 and (low concentration) GM-CSF, G- CSF, IL-6 (CD34+ amplification)
  • J9- 14 low molecular heparin + mix of cytokines (strong concentration) SCF, Flt3L, IL-15, IL-7 and GM-CSF, G-CSF, IL-6 ( low concentration ,NK differentiation).
  • IL-18 and IFN alpha can be also used.
  • the step of depleting the T cells is carried out by a method comprising the step of:
  • the depleting antibody is preferably at least an antibody selected from the group consisting of an anti-CD3, an anti-CD 14, and an anti-CD 20 antibody, preferably an anti-CD3 antibody.
  • each UCB unit or the pooled n UCB units are red cell-/ erythrocytes depleted, preferably by density gradient separation, more preferably by Ficoll-Paque® density gradient separation, by the Hetastarch (Hydroxyethyl Starch; HES) method, by using the PrepaCyte® CB device or by a step of freezing and thawing;
  • density gradient separation more preferably by Ficoll-Paque® density gradient separation
  • HES Hetastarch
  • each UCB unit or the pooled n UCB units are red cell-depleted by a method comprising the lysis of the red blood cells, particularly by a method including a step of freezing and thawing the cells contained in each of the UCB unit or in the n UCB units pooled cells.
  • the UCB units used in step b) or in step i) are thawed UCB units from frozen stored UCB units.
  • Said pooled UCB units, or fraction thereof containing cells, obtained at the end of the method is preferably stored at a temperature below -70°C, preferably below - 80°C, more preferably in liquid nitrogen.
  • each UCB unit is preliminary diluted in a suitable culture medium, preferably in a RPMI medium before use; and/or
  • the collected cells are resuspended in a suitable culture medium, preferably in a RMPI medium, or in medium type X-VIVOTM (Lonza), AIM-VTM medium (Invitrogen) or CellGroTM (CellGenix), this medium optionally containing fetal bovine serum AB negative (FBS); and/or
  • a suitable culture medium preferably in a RMPI medium, or in medium type X-VIVOTM (Lonza), AIM-VTM medium (Invitrogen) or CellGroTM (CellGenix), this medium optionally containing fetal bovine serum AB negative (FBS); and/or
  • the collected cells from each red-cell depleted UCB unit or from the pooled red-cell depleted UCB units are stored frozen, the collected cells are resuspended in a suitable culture comprising a white cells cryoprotectant.
  • the ratio between the NK cells and the accessory cells present in the suitable medium for NK cells expansion/activation is comprised between 0.01 and 2, preferably between 0.05 and 1.0, more preferably between 0,1 and 0.5.
  • the accessory cells present in the suitable medium for NK cells expansion/activation and the NK cells to be expanded/activated are HLA-KIR mismatched.
  • the invention relates to a method for the production of a pooled, and activated and/or expanded NK cells according to the present invention, wherein said method further comprising a step of CD56+ NK cells enrichment.
  • a method for the production of at least 2, 3, preferably 4 distinct pools a population of expanded, optionally, activated NK cells from UCB units according to the present invention wherein the major HLA class I group recognized by NK cells for each pooled n UCB is different and selected from the group consisting of HLA A3/A11 which is recognized by KIR3DL2, HLA Bw4, which recognized by KIR3DL1, HLA C group 1 which is recognized by KIR2DL2/3 and HLA C group 2 which is recognized by KIR2DL2.
  • HLA A3/A11 which is recognized by KIR3DL2, HLA Bw4, which recognized by KIR3DL1, HLA C group 1 which is recognized by KIR2DL2/3
  • HLA C group 2 which is recognized by KIR2DL2.
  • NK cells originated from at least n UCB units, or fraction thereof containing NK cells, with n > 2, preferably 2 ⁇ n ⁇ 100 or 3 ⁇ n ⁇ 50, more preferably 3 ⁇ n ⁇ 25, and, preferably, wherein said n UCB units further present the same pattern for major HLA class I groups genotype, preferably wherein the major HLA class I group recognized by NK cells for each pooled n UCB is different and selected from the group consisting of HLA A3/A11 which is recognized by KIR3DL2, HLA Bw4, which recognized by KIR3DL1, HLA C group 1 which is recognized by KIR2DL2/3 and HLA C group 2 which is recognized by KIR2DL2.
  • said population of cells obtainable by the above method further exhibiting for each pooled n UCB a miss expression of one of the KIRs selected from the group of KIR2DL2 and KIR2DL3, KIR2DL1, KIR3DL1 and KIR3DL2.
  • the invention also relates to a pharmaceutical composition according to the present invention further comprising a pharmaceutically acceptable carrier.
  • pharmaceutically acceptable carrier refers to a compound or a combination of compounds made part of a pharmaceutical composition that do not cause secondary reactions and that, for example, facilitate the administration of the active compounds, increase their lifespan and/or effectiveness in the body, increase their solubility in solution or improve their preservation.
  • Said pharmaceutically acceptable carriers are well known and will be adapted by those persons skilled in the art according to the nature and the mode of administration of the active compounds selected.
  • the invention is directed to a product or a composition
  • a product or a composition comprising a collection of storage containers for mammalian cells, preferably for human cells, wherein each of said storage containers contains a fraction of a production lot of a population of cells, preferably pooled UCBs NK cells obtainable or obtained by the above described method and a therapeutic antibody which can be bound by CD 16.
  • said collection of storage containers for mammalian cells according to the present invention contains expanded and/or activated NK cells.
  • said collection of storage containers for mammalian cells according to the present invention or said composition according to the present invention contains at least 10 7 , preferably 2 to 10. 10 7 or 10 to 100. 10 7 activated and/or expanded NK cells, depending of the weight of patient to be treated.
  • each of said storage containers collection according to the present invention, or said composition according to the present invention contains NK cells and being essentially free of CD3+ T cells, preferably less than 0.1 % or less than 0.01 ,.
  • said collection of storage containers for mammalian cells according to the present invention or said composition according to the present invention contains:
  • the invention is directed to a storage container of a collection of storage containers according to the present invention, or said composition according to the present invention, for its use for suppressing the proliferation of tumor cells, preferably for the prevention and/or the treatment of cancer or for the treatment of infection.
  • said tumor cells or cancer to be treated are selected from the group of hematologic malignancy tumor cells, solid tumor cells or carcinoma cells, preferably leukemia cells, acute T cell leukemia cells, chronic myeloid lymphoma
  • CML cells acute myelogenous leukemia cells, chronic myelogenous leukemia (CML) cells, multiple myeloma cells, or lung, colon, prostate, glyoblastoma cancer.
  • the pooled activated and/or expanded NK cells as prepared according to the invention or said composition according to the present invention may also useful for the treatment of infectious diseases or dysimmune/autoimmune diseases.
  • the cells contained in the storage container or the composition according to the present invention are administered to the subject by a systemic or local route, depending of the disease/pathology to be treated.
  • said compounds may be administered systemically by intramuscular, intradermal, intraperitoneal or subcutaneous route, or by oral route.
  • the composition comprising the antibodies according to the invention may be administered in several doses, spread out over time.
  • Figures 1-1 to 1-3 (sub-figures 1, 2 and 3 of Figure 1) is a schema illustrating anexample of a manufacture process of the present invention.
  • Figures 2 and 3 illustrate the NK proliferation obtained after or without CD3 depletion.
  • Figure 4 illustrates the NK proliferation obtained from pooled CD3-depleted UCB units.
  • Figure 5 illustrates the NK proliferation obtained from 5 pooled CD3-depleted UCB units.
  • Figure 6 illustrates the NK proliferation obtained from pooled UCB units without prior CD3-depletion.
  • Figure 7 illustrates the NK proliferation from pooled UCB units after 9 days of culture with CD3-non depleted UCBs.
  • Figure 8 illustrates the NK proliferation amplification factor obtained with 2 KIR-HLA matched UCBs and amplified with PLH accessory cells
  • Figure 9 illustrates the NK proliferation amplification factor obtained with 2 KIR-HLA mismatched UCBs amplified with PLH accessory cells.
  • FIG. 10A-10B illustrates Example 7, first experiment.
  • FIG. 11A-11B illustrates Example 7, second experiment.
  • Figures 12A-12C Percentage of patient cells lysis induced by the combination of NK cells + mAb for p45 B lymphoma patient cells (Fig.l2A) and for B-CLL p53 and p46 patient cells (Fig. 12B and 12C).
  • Figures 13A-13D Percentage of cell line cells lysis induced by the combination of NK cells + mAb for Daudi cell line (Fig.l3A), Raji cell line (Fig. 12B), Ri-1 cell line (Fig. 12C) and SUDHL4 cell line (Fig. 13D).
  • Figures 14A-14D Study of anti-CD20 dose effect (E:T 1/1) on cell lines.
  • PLH (Example 4): no HLA-C1, ECACC bank n°88052047, IHW number 9047
  • This cell line was obtained by EBV immortalization of B lymphocytes coming from a Scandinavian woman. This cell is completely HLA genotyped and have the particularity to express HLA Class I alleles from C group 2, A3/A11 and Bw4 types but not from C group 1 (complete informations on IMGT/HLA database).
  • This cell line is used as accessory cell for NK amplification/activation protocol because it allows to choose a specific HLA mismatch between accessory cell and UCBs (expressing HLA C group 1, and potentially the associated inhibitory receptor
  • HOM-2 (Example 4): no HLA-C2, ID n°HC107505, IHW number 9005
  • This cell line was obtained by EBV immortalization of B lymphocytes coming from a Canadian/North American woman. This cell is completely HLA genotyped and have the particularity to express HLA Class I alleles from C group 1, A3/A11 and Bw4 types but not from C group 2 (complete informations on EVIGT/HLA database).
  • This cell line is used as accessory cell for NK amplification/activation protocol because it allows to choose a specific HLA mismatch between accessory cell and UCBs (expressing HLA C group 2, and potentially the associated inhibitory receptor KIR2DL1). Being transformed by EBV infection increases its NK activation ability because of membrane expression of some viral induced ligands for NK activating receptors.
  • 1/Density gradient cell separation medium of Ficoll and sodium diatrizoate used for the separation of lymphocytes Histopaque- 1077 from Sigma Aldrich, Saint Louis, MO, USA
  • 3/Cellular culture medium RPMI 1640 Glutamax from Invitrogen, Carlsbad, CA, USA, purchased from France distributor Thermo Fisher Scientific
  • UCBs were processed by ficoll UCB mononuclear cells isolation before first freezing.
  • CD3 depletions were done with a manual magnetic depletion kit.
  • HLA A3/A11 recognized by KIR3DL2
  • HLA Bw4 recognized by KIR3DL1
  • HLA C group 1 recognized by KIR2DL2/3
  • HLA C group 2 recognized by KIR2DL1.
  • Pooled UCBs are activated with an accessory cell missing one of the HLA recognized by the expressed pooled UCBs iKIRs.
  • NK cells were amplified for 20-24 days.
  • Cytokines used are IL-2 (lOOIU/ml) and IL-15 (5ng/ml). These concentrations can be modified to obtain similar results.
  • Accessory cells are EBV-immortalized cell lines (cells expressing virus induced activating ligands) with specific HLA genotypes (one major HLA class I group missing).
  • Accessory cells can be irradiated by different ways with different irradiation doses (here we mainly used 20 seconds UV irradiation, but also 105Gy gamma irradiation for the last experiment, that showed better amplification results).
  • Irradiated accessory cells can be used with or without prior cryopreservation: freshly irradiated cells or as irradiated cryopreserved cells (irradiation just before freezing).
  • NK cells derived from pooled CD3-depleted UCBs represented already more than 90% of alive cells at the end of the process.
  • the CD56 selection step is not essential, but will probably improve NK purity and be preferable (and potentially totally required) for a pharmaceutical product.
  • UCBs will be processed differently before first freezing, using a GMP- compliant method such as HetastarchTM or PrepaCyte CBTM device (or other existing and clinically accepted method).
  • GMP- compliant method such as HetastarchTM or PrepaCyte CBTM device (or other existing and clinically accepted method).
  • - NK amplification culture duration can be optimized: from 14 to 28 days.
  • IL-2 and IL-15 concentrations can be optimized.
  • the CD3-depletion will be done with an automatic clinically accepted device such as cliniMACS.
  • the CD3-depletion can also be done just after erythrocyte elimination and volume reduction (maybe better results in term of NK recovery).
  • the preferentially CD3- depleted UCB units can be pooled at various moments of the process: before amplification culture, during amplification culture, or at the end of the amplification culture.
  • UCB mononuclear cells obtained by Ficoll separation were cryopreserved, then thawed and CD3-depleted using a stem cell kit for a part.
  • Three CD3-depleted or total UCBs with same the major HLA class 1 groups A3/A11+, Bw4+,C1+,C2+ genotype were pooled and cultured for 21-25 days with IL-2, IL-15 and irradiated accessory cells PLH (A3/Al l+,Bw4+,Cl-,C2+ genotype) added each 4 days.
  • UCB mononuclear cells obtained by Ficoll separation were cryopreserved, then thawed and CD3-depleted using a stem cell kit.
  • Three CD3-depleted UCBs with same the major HLA class 1 groups A3/Al l-,Bw4+,Cl-,C2+ genotype were pooled and cultured for 21-25 days with IL-2, IL-15 and irradiated accessory cells HOM-2
  • Alive NK cells were regularly counted using the MUSE Millipore system and flow cytometry characterization of cellular composition in the culture.
  • cytotoxicity was evaluated against well-known K562 target cells, and tumoral cells for experiment 2 and 3 (2h incubation with NK:K562 ratio 3: 1, NK:purified B lymphoma cells ratio 3: 1, NK:AML cells (in total PBMC sample of the patient) ratio 10: 1).
  • UCB 1 HLA Al l :01/A29:02, B35:01/B44:02, C04:01/C16/01 > HLA A3/A11+, Bw4+, C1+, C2+
  • UCB2 HLA Al l :01/A23:01, B35:02/B49:01, C04:01/07:01 > HLA A3/A11+, Bw4+, C1+, C2+
  • UCB3 HLA A2/A3, B 18/B51, C5/C14 > HLA A3/A11+, Bw4+, C1+, C2+ NK proliferation from isolated UCBs show better results after CD3-depletion because T lymphocytes are in competition with NK cells for proliferation with the cytokines used (and CD8-T lymphocytes directed against EBV antigen are also stimulated by accessory cells).
  • NK amplification factor is relatively low in this experiment due to technical issue.
  • Activating receptors are well expressed, and cytotoxicity against common target K562 of cultured NK cells is highly better than with un-activated NK cells.
  • UCB 1 HLA AO 1/02, B27:05/B40:02/C02:02/C15:02 > HLA A3/A11-, Bw4+, C1-, C2+
  • UCB2 HLA A2/A31, B50/B51, C06:02/15:02 > HLA A3/A11-, Bw4+, C1-, C2+
  • UCB 3 HLA A23/A24, B44/B44, C4/C5 > HLA A3/A11-, Bw4+, C1-, C2+
  • NK proliferation from pooled CD3-depleted UCBs with this new genotype is similar to NK proliferation with isolated CD3-depleted UCBs.
  • NK amplification factor is higher in this experiment (no technical issue), but can still be improved by protocol optimization specifically for the new accessory cell line.
  • Activating receptors are very well expressed. Cytotoxicity against common target K562 of cultured NK cells is highly better than with unactivated NK cells, and we observe a significant cytotoxicity against B lymphoma tumoral cells with a 2 hours incubation.
  • NK cells Pooling CD3-depleted UCBs with another major HLA groups genotype, and amplifiying NK cells with another iKIR-HLA mismatch and another accessory cell line is feasible. Amplified NK cells are well-activated.
  • UCBs HLA A3/A11-, Bw4+, C1+, C2- Table 3:
  • NK proliferation from 5 pooled CD3-depleted UCBs is good.
  • Activating receptors are very well expressed. Cytotoxicity against common target K562 of cultured NK cells is highly better than with unactivated NK cells, and we observe a small specific cytotoxicity against AML tumoral cells with a 2 hour incubation (but we could'nt observe cytotoxicity after 20h because at this time patient cells died because of thawing).
  • UCB 1 HLA A2:01/A68:01 ; B38:01/B57:01 ; C6:02/C12:03 > C1+, C2+, A3/A11-, Bw4+
  • UCB 2 HLA Al :01/A2:01 ; B52:01/B57:01 ; C6:02/C12:02 > C1+, C2+, A3/A11-, Bw4+
  • UCB 3 HLA A02/02; B 15:09/B50:02; C06/C07 > C1+, C2+, A3/A11-, Bw4- NK amplification can be similar in isolated or pooled UCBs without prior CD3- depletion.
  • UCB 1 HLA Al l:01/A29:02, B35:01/B44:02, C04:01/C16/01 > HLA A3/A11+, Bw4+, C1+, C2+
  • UCB2 HLA Al l:01/A23:01, B35:02/B49:01, C04:01/07:01 > HLA A3/A11+, Bw4+, C1+, C2+
  • UCB1 HLA A02:02/30:01, B42:01/B53:01, C04:01/17:01 > HLA A3/A11-, Bw4+, C1-, C2+
  • UCB2 HLA Al l:01/A23:01, B35:02/B49:01, C04:01/07:01 > HLA A3/A11+, Bw4+, C1+, C2 Table 5:
  • NK cells from CD3-non depleted iKIR-HLA mismatched pooled UCBs showed a lower amplification factor, and pooling these UCBs after 9 days amplification gave better NK amplification. They showed an in vitro similar good cytotoxicity against B lymphoma tumoral cells (overnight, ratio E:T 1: 1).
  • EXAMPLE 6 PERSPECTIVES
  • the manufacturing process of pooled activated/expanded NK cells according to the present invention will be adapted to the pharmaceutical regulatory obligations, and every step of the process adapted for the best quality guarantee.
  • acceptance criteria of UCB units must be set, such as more than 1.4 or 1.6 10 6 total nucleated cells (currently 1.85 10 6 total nucleated cells for our local UCB bank), with potentially a minimal threshold for the NK percentage such as 7% (3-15% NK generally observed in UCB total nucleated cells).
  • CD3-depletion of UCBMCs can be better adapted to regulatory compliances and/ or GMP process for pharmaceutical uses, for example with an adapted clinically upgradable material such as CliniMACSTM, and by determining the best step time for CD3-depletion whether it is needed, before or after first cryopreservation step for the best cell recovery and the best CD3-depletion quality.
  • an adapted clinically upgradable material such as CliniMACSTM
  • the freezing, cryopreservation and thawing procedures for UCBMC can be improved using authorized procedures for clinical applications after validation of the manufacturing process.
  • Adapted material for bag closed system can be used and cryopreservation conditions (media, cell concentration) can be easily optimized by the skilled person for the method of the present invention. These optimization steps only should certainly improve the total cell recovery after thawing.
  • the acceptance criteria for each thawed UCBMCs to go further into the manufacturing process according to pharmaceutical guidelines should be set.
  • HLA-genotyping and inhibitory KIR expression evaluation procedures should be validated to select the different UCB units allowed to be pooled for the amplification/activation step: selection criteria should be set for each lot.
  • GMP compliant upgradable accessory cells whether they will be included in the method of the invention, with a final screening on NK amplification:activation for clones selection.
  • Final accessory cells must be well- characterized for use in a therapeutic agent production procedure. This optimization step could also improve NK amplification/activation results.
  • irradiation procedure will be optimized and validated for the best amplification/activation results with clinically adapted quality parameters, and acceptance criteria of cryopreserved irradiated accessory cells lots will be set, including unproliferation evaluation, cells viability, EBV inactivation ...etc.
  • a dynamic culture closed system in bioreactors will be used for amplification/activation step with at least 5, preferably 10 pooled UCB units, such as the Wave systemTM (GE Healthcare) already tested for NK culture.
  • Wave systemTM GE Healthcare
  • culture medium used for the amplification/activation step using animal serum-free media such as X-VIVOTM media from Lonza, CellGro SCGMTM from Cellgenix or AIM VTM from Invitrogen (already tested for NK cultures) can be used.
  • animal serum-free media such as X-VIVOTM media from Lonza, CellGro SCGMTM from Cellgenix or AIM VTM from Invitrogen (already tested for NK cultures) can be used.
  • CD56 positive selection of amplified/activated NK cells using an adapted clinically upgradable material such as CliniMACSTM will be used.
  • a step of acceptance criteria of final amplified/activated products must be included in the process, including product identification steps (genetic stability, chimerism, phenotype) and a standard potency evaluation procedure.
  • NK cells before and after the process of the present invention will be checked, looking at their karyotype (for example by G- banded karyotyping or cytoscanHD microarray methods wel-known by the sfilled person), and the chimerism of the final pooled NK cells from the different donors must be defined (for example by standard multiplex PCR STR methods).
  • NKG2D NK phenotypical markers
  • NKG2C NKG2C
  • CD94 NKp44
  • NKp30 NKp46
  • CD158 NKp46
  • each product lot will be tested with a validated cytotoxicity assay against commonly used well-known target cells
  • the absence of contaminations such as bacteria, fungi, mycoplasma and viruses (particularly EBV) must be verified during or after the final step of the process, as the absence of endotoxins and cytokines used during the manufacturing process.
  • the population of cells obtained is frozen, kept in liquid nitrogen and thawed before their use
  • the 5 Ficoll/depleted nUCB units cells obtained in the preceding step are pooled.
  • the pooled NK cells obtained are thus expanding and activating by contacting the NK cells contained in the pool, in a suitable medium to produce said population of pooled expanded and activated NK cells as described before, for an expanding/activation step(s) total duration comprised between 9 and 28 days
  • Culture medium RPMI FBS 10% IL-2 100 IU/ml 1-15 5ng/ml;
  • Amplification factor at D21 256.6 ; 99,5% of NK cells, 100% CD69+, 84,6% CD16+ (directly used for cytotoxicity test).
  • lymphoma B tumor sample (97% tumoral cells) ;
  • B-CLL B-cell chronic lymphocytic leukemia
  • the patient cells sample are thawing and, l-2h after thawing, are used in cytotoxicity assay
  • 50,000 target cells/microwell 200 ⁇ 1 in final (96-well microplate conical bottom), RPMI medium FBS (Foetal bovine serum) 10%, IL-2 100 IU/ml, +/- rituximab
  • Fresh (not freezed- thawed) pooled UCBs NK cells are used (21 days after their production);
  • Ratio NK cells / tumoral cells as indicated in the figures 6A-6B.
  • the pooled UCBs NK cells mediate Antibody-Dependent Cell- mediated Cytotoxicity on cellules CD20+tumoral cells.
  • the pooled UCBs NK cells mediate Antibody-Dependent Cell- mediated Cytotoxicity on cellules CD20+tumoral cells.
  • EXAMPLE 8 Anti CD20 TG20 act as a synergic manner to increase ADCC involved by NK cells
  • TG20 (LFB S.A., Les Ulis, France, TG Therapeutics Inc., New York, N.Y.) to decrease progression or cure hematological cancers such as non-Hodgkin B-cell lymphoma or B-Cell chronic lymphocytic leukemia.
  • TG20 is also called TG-20, Ublituximab, LFB-R603, TG-1101 or TGTX-1 101.
  • TG-20 Ublituximab
  • LFB-R603 TG-1101
  • TGTX-1 101 TGTX-1 101.
  • TG20 (Ublituximab) is a chimeric recombinant IgGl monoclonal antibody directed against human CD20 with potential antineoplastic activity. Ublituximab specifically binds to the B cell- specific cell surface antigen CD20, thereby potentially inducing a B cell-directed complement dependent cytotoxicity (CDC) and antibody-dependent cell-mediated cytotoxicity (ADCC) against CD20-expressing B cells, leading to B cell apoptosis.
  • CD20 is a non- glycosylated cell surface phosphoprotein that is exclusively expressed on B cells during most stages of B cell development and is often overexpressed in B-cell malignancies.
  • Ublituximab has a specific glycosylation profile, with a low fucose content, that may enhance its ADCC response against malignant B cells.
  • NK cells are able to interact with cytotoxic monoclonal antibodies and lyse cells which are recognized by these monoclonal antibodies. This property is well known as "antibody dependent cellular cytotoxicity" (ADCC).
  • ADCC antibody dependent cellular cytotoxicity
  • This example demonstrates in vitro on clinical samples from patients that anti CD20 TG20 act as a synergic manner to increase ADCC involved by expansed and activated NK cells from pooled umbilical cord blood.
  • NK cells are produced regarding good manufacturing process (GMP) and characterized in order to have 99% of purity at day 21.
  • ADCC assays were performed on patient samples and also on 5 cell lines.
  • mAb concentration 10 ⁇ g/ml
  • TG20 is compared to gold standard Rituximab (Genentech, Roche) TG20 and Rituximab are pre-incubated 15 min at room temperature.
  • E:T ratio Variation of E:T ratio observed between assays is technically experience-dependent. Each sample of patient respond as an independent manner to the NK treatment alone. We observed for low E:T ratio 49%, 23% or 37% of lysis induced by NK cells alone for respectively p45, p46 and p53 patients. With a higher E:T ratio lysis induced by NK cells alone increased as 58% for p45 and 39% for p46.
  • NK cells and mAb increase dramatically percentage of target lysis in all cases. Compare to treatment of NK cells alone, we observe an increase of about 40% with the combination of NK cells + mAb in patient p45, an increase of 145 % for low E:T ratio and 50% for high E:T ratio in patient p46 and an increase of 29% for NK+TG20 ⁇ and 18% for NK+ Rituximab ⁇ in patient p53.
  • Daudi Bovine lymphoma, high CD20
  • Raji Burkitt lymphoma, low CD20
  • SUDHL4 DL-BCL GC (Diffuse Large B Cell Lymphoma Germinal Center)
  • Rl- 1 DL-BCL
  • ABC Active B-Cell
  • HL60 AML (Acute Myeloid Leukaemia)
  • mAb concentration 0.1 ; 1 ; 5 et 10 ⁇ g/ml
  • TG20 is compared to gold standard Rituximab (Genentech, Roche)
  • TG20 and Rituximab are pre-incubated 15 min at room temperature. After NK addition, incubate 4h at 37 °C before flow cytometry analysis

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Abstract

L'invention concerne le domaine de la thérapie cellulaire, en particulier de la thérapie médiée par les cellules NK associées à des anticorps. La présente invention concerne des procédés et des compositions permettant d'augmenter l'efficacité des cellules tueuses naturelles (cellules NK) et/ou des anticorps hérapeutiques, lesdits procédés et compositions comprenant l'utilisation de cellules NK regroupées à partir d'unités de sang de cordon ombilical (unintés UCB), de préférence des cellules NK alloréactives, en association avec un anticorps thérapeutique afin d'augmenter l'efficacité du traitement chez des sujets humains, en particulier par une augmentation du mécanisme de cytotoxicité à médiation cellulaire dépendante d'anticorps (ADCC). La présente invention concerne ladite composition en tant que composition pharmaceutique, de préférence pour son utilisation pour le traitement d'une maladie chez un sujet humain qui en a besoin, de préférence dans lequel ladite maladie est un cancer, infectieuses ou d'une maladie immune. Enfin, la présente invention se rapporte également à un procédé de traitement d'une maladie chez un sujet humain qui en a besoin, comprenant l'administration audit sujet dudit cellules NK à partir d'un pool UCB, de préférence alloréactives, en combinaison avec un anticorps thérapeutique qui peut être lié à ladite cellules NK.
EP16774876.3A 2015-09-11 2016-09-12 Cellules tueuses naturelles (nk) groupées issues du sang de cordon ombilical associées à des anticorps et leurs utilisations pour le traitement d'une maladie Pending EP3347454A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP2015306403 2015-09-11
PCT/EP2016/071470 WO2017042393A1 (fr) 2015-09-11 2016-09-12 Cellules tueuses naturelles (nk) groupées issues du sang de cordon ombilical associées à des anticorps et leurs utilisations pour le traitement d'une maladie

Publications (1)

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EP3347454A1 true EP3347454A1 (fr) 2018-07-18

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EP16774876.3A Pending EP3347454A1 (fr) 2015-09-11 2016-09-12 Cellules tueuses naturelles (nk) groupées issues du sang de cordon ombilical associées à des anticorps et leurs utilisations pour le traitement d'une maladie

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EP (1) EP3347454A1 (fr)

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