JP2021180682A - 無血清細胞培養培地 - Google Patents
無血清細胞培養培地 Download PDFInfo
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- 230000037439 somatic mutation Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000003270 steroid hormone Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229960001603 tamoxifen Drugs 0.000 description 1
- 229960003604 testosterone Drugs 0.000 description 1
- 229960002180 tetracycline Drugs 0.000 description 1
- 229930101283 tetracycline Natural products 0.000 description 1
- 235000019364 tetracycline Nutrition 0.000 description 1
- 150000003522 tetracyclines Chemical class 0.000 description 1
- 229940124597 therapeutic agent Drugs 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
- 239000012581 transferrin Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
- 235000004835 α-tocopherol Nutrition 0.000 description 1
- 150000003772 α-tocopherols Chemical class 0.000 description 1
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Abstract
Description
[本発明1001]
≧0.09mM±0.014mMのオルニチンを含む、無血清である細胞培養培地。
[本発明1002]
≧0.20±0.03mMのプトレシンを含む、本発明1001の細胞培養培地。
[本発明1003]
0.09±0.014mM〜0.9±0.14mMのオルニチンを含む、本発明1001および1002のいずれかの細胞培養培地。
[本発明1004]
0.09±0.014mM、0.3±0.05mM、0.6±0.09mMまたは0.9±0.14mMでオルニチンを含む、本発明1001から1003のいずれかの細胞培養培地。
[本発明1005]
0.20±0.03mM〜0.714±0.11mMのプトレシンを含む、本発明1001から1004のいずれかの細胞培養培地。
[本発明1006]
0.20±0.03mM、0.35±0.06または0.714±0.11mMでプトレシンを含む、本発明1001から1004のいずれかの細胞培養培地。
[本発明1007]
加水分解物を含まない、本発明1001から1006のいずれかの細胞培養培地。
[本発明1008]
化学的に規定されている、本発明1001から1006のいずれかの細胞培養培地。
[本発明1009]
≧40±6mMのアミノ酸またはその塩の混合物を含む、本発明1001から1008のいずれかの細胞培養培地。
[本発明1010]
アミノ酸の前記混合物が、アラニン、アルギニン、アスパラギン、アスパラギン酸、システイン、グルタミン酸、グリシン、ヒスチジン、イソロイシン、ロイシン、リシン、メチオニン、フェニルアラニン、プロリン、セリン、スレオニン、トリプトファン、チロシンおよびバリンからなる、本発明1009の細胞培養培地。
[本発明1011]
1種または複数の脂肪酸を含む、本発明1001から1010のいずれかの細胞培養培地。
[本発明1012]
前記1種または複数の脂肪酸が、リノール酸、リノレン酸、チオクト酸、オレイン酸、パルミチン酸、ステアリン酸、アラキジン酸、アラキドン酸、ラウリン酸、ベヘン酸、デカン酸、ドデカン酸、ヘキサン酸、リグノセリン酸、ミリスチン酸およびオクタン酸からなる群より選択される、本発明1011の細胞培養培地。
[本発明1013]
ヌクレオシドの混合物を含む、本発明1001から1012のいずれかの細胞培養培地。
[本発明1014]
ヌクレオシドの前記混合物が、アデノシン、グアノシン、シチジン、ウリジン、チミジンおよびヒポキサンチンのうちの1種または複数を含む、本発明1013の細胞培養培地。
[本発明1015]
アデノシン、グアノシン、シチジン、ウリジン、チミジンおよびヒポキサンチンを含む、本発明1001から1014のいずれかの細胞培養培地。
[本発明1016]
1種または複数の二価カチオンを含む、本発明1001から1015のいずれかの細胞培養培地。
[本発明1017]
前記二価カチオンが、マグネシウム、カルシウムまたはそれらの両方である、本発明1016の細胞培養培地。
[本発明1018]
Ca2+およびMg2+を含む、本発明1001から1017のいずれかの細胞培養培地。
[本発明1019]
細胞を培養するための方法であって、(a)本発明1001から1018のいずれかの細胞培養培地を提供するステップ、および(b)前記細胞培養培地中で細胞を成長させるかまたは維持して、細胞培養物を形成するステップを含む、方法。
[本発明1020]
前記細胞が、哺乳動物細胞、鳥類細胞、昆虫細胞、細菌細胞および酵母細胞からなる群より選択される、本発明1019の方法。
[本発明1021]
前記細胞がCHO細胞である、本発明1019または本発明1020の方法。
[本発明1022]
前記細胞が目的のタンパク質を発現する、本発明1019から1021のいずれかの方法。
[本発明1023]
前記目的のタンパク質が抗原結合性タンパク質である、本発明1022の方法。
[本発明1024]
前記目的のタンパク質がFcドメインを含む、本発明1022または1023の方法。
[本発明1025]
前記目的のタンパク質が受容体−Fc−融合タンパク質である、本発明1022から1024のいずれかの方法。
[本発明1026]
前記受容体−Fc−融合タンパク質がtrapタンパク質である、本発明1025の方法。
[本発明1027]
前記trapタンパク質が、IL−1アンタゴニストまたはVEGFアンタゴニストである、本発明1026の方法。
[本発明1028]
前記目的のタンパク質が、抗体または抗体断片である、本発明1022または1023の方法。
[本発明1029]
前記抗体または前記抗体断片が、組換えヒト抗体またはその断片である、本発明1028の方法。
[本発明1030]
前記細胞が、≦30時間の平均倍加時間を有する、本発明1019から1029のいずれかの方法。
[本発明1031]
前記細胞が、≦24時間の平均倍加時間を有する、本発明1019から1030のいずれかの方法。
[本発明1032]
前記細胞が、<0.3±0.045mMのオルニチンおよび<0.2±0.03mMのプトレシンを含む細胞培養培地において増殖した細胞の平均倍加時間の少なくとも3分の1である平均倍加時間を有する、本発明1019から1031のいずれかの方法。
[本発明1033]
前記細胞培養物が、<0.09±0.014mMのオルニチンおよび<0.2±0.03mMのプトレシンを含む培地中の類似の細胞培養物よりも少なくとも15%大きい生存細胞計数密度に達することが可能である、本発明1019から1032のいずれかの方法。
[本発明1034]
前記細胞培養物が、<0.09±0.014mMのオルニチンおよび<0.2±0.03mMのプトレシンを含む類似の細胞培養培地中の類似の細胞培養物よりも少なくとも3倍大きい生存細胞計数密度に達することが可能である、本発明1019から1033のいずれかの方法。
[本発明1035]
1種または複数のユースポイント添加物を、前記細胞培養培地に添加するステップを含む、本発明1019から1034のいずれかの方法。
[本発明1036]
前記ユースポイント添加物が、NaHCO3、グルタミン、インスリン、グルコース、CuSO4、ZnSO4、FeCl3、NiSO4、Na4 EDTAおよびクエン酸Na3のうちの1種または複数を含む、本発明1035の方法。
[本発明1037]
NaHCO3、グルタミン、インスリン、グルコース、CuSO4、ZnSO4、FeCl3、NiSO4、Na4 EDTAおよびクエン酸Na3の各々が、ユースポイント添加物として前記培地に添加される、本発明1035または1036の方法。
[本発明1038]
タンパク質を生成するための方法であって、前記方法は、(a)目的のタンパク質をコードする配列を含む核酸を細胞中に導入するステップ;(b)前記核酸を保有する細胞を選択するステップ;(c)本発明1001から1018のいずれかの細胞培養培地において、または本発明1019から1037のいずれかの方法に従って、選択された前記細胞を培養するステップ;および(d)前記細胞において前記目的のタンパク質を発現させるステップを含み、前記目的のタンパク質が前記培地中に分泌される、方法。
[本発明1039]
前記細胞が、CHO細胞、293細胞またはBHK細胞である、本発明1038の方法。
[本発明1040]
前記目的のタンパク質が抗原結合性タンパク質である、本発明1038または1039の方法。
[本発明1041]
前記目的のタンパク質がFcドメインを含む、本発明1038から1040のいずれかの方法。
[本発明1042]
前記目的のタンパク質が、受容体−Fc−融合タンパク質(TRAP)、可溶性TCR−Fc融合タンパク質、抗体、Fc−融合タンパク質およびScFvタンパク質からなる群より選択される、本発明1038から1041のいずれかの方法。
[本発明1043]
前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも7%大きい平均7日目力価で生成される、本発明1038から1042のいずれかの方法。
[本発明1044]
前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも14%大きい平均7日目力価で生成される、本発明1038から1043のいずれかの方法。
[本発明1045]
前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも80%大きい平均7日目力価で生成される、本発明1038から1044のいずれかの方法。
[本発明1046]
前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも2倍大きい平均7日目力価で生成される、本発明1038から1045のいずれかの方法。
[本発明1047]
前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも3倍大きい平均7日目力価で生成される、本発明1038から1046のいずれかの方法。
[本発明1048]
前記目的のタンパク質が組換えヒト抗体である、本発明1038から1047のいずれかの方法。
本明細書で使用する場合、「ペプチド」、「ポリペプチド」および「タンパク質」は、至る所で相互交換可能に使用され、ペプチド結合によって互いに接続された2つまたはそれ超のアミノ酸残基を含む分子を指す。ペプチド、ポリペプチドおよびタンパク質は、改変、例えばグリコシル化、脂質結合、硫酸化、グルタミン酸残基のガンマ−カルボキシル化、アルキル化、ヒドロキシル化およびADP−リボシル化もまた含み得る。ペプチド、ポリペプチドおよびタンパク質は、タンパク質ベースの薬物を含む、科学的または商業的に興味を持たれるものであり得る。ペプチド、ポリペプチドおよびタンパク質には、とりわけ、抗体およびキメラまたは融合タンパク質が含まれる。ペプチド、ポリペプチドおよびタンパク質は、細胞培養方法を使用して組換え動物細胞株によって生成される。
本発明は、細胞を培養する際およびバイオ医薬品薬物物質を生成する際に有用な無血清培地を提供する。「無血清」は、動物血清、例えば胎仔ウシ血清を含まない細胞培養培地に適用される。この無血清培地は、≦7.5g/Lの加水分解物、例えばダイズ加水分解物を含み得る。本発明はまた、無血清なだけでなく、加水分解物もまた含まない、化学的に規定された培地を提供する。「加水分解物を含まない」は、外因性タンパク質加水分解物、例えば動物または植物のタンパク質加水分解物、例えば、ペプトン、トリプトンなどを含まない細胞培養培地に適用される。
本発明は、上記OS培地中に目的のタンパク質を発現する細胞株を含む細胞培養物を提供する。一実施形態では、この細胞培養物は、ユースポイント成分として培地に添加され得るまたは培地処方中に含まれ得る、インスリンを含む。一実施形態では、この細胞株は、生物治療剤タンパク質を生成することが可能な細胞を含む。タンパク質生物治療剤を生成するために慣用的に使用される細胞株の例には、とりわけ、初代細胞、BSC細胞、HeLa細胞、HepG2細胞、LLC−MK細胞、CV−1細胞、COS細胞、VERO細胞、MDBK細胞、MDCK細胞、CRFK細胞、RAF細胞、RK細胞、TCMK−1細胞、LLCPK細胞、PK15細胞、LLC−RK細胞、MDOK細胞、BHK細胞、BHK−21細胞、CHO細胞、CHO−K1細胞、NS−1細胞、MRC−5細胞、WI−38細胞、BHK細胞、3T3細胞、293細胞、RK細胞、Per.C6細胞およびニワトリ胚細胞が含まれる。一実施形態では、この細胞株は、CHO細胞株、または大規模タンパク質生成のために最適化されたいくつかの特定のCHO細胞バリアントのうちの1つもしくは複数、例えば、CHO−K1である。
化学的に規定されたOS培地およびOS培地中で細胞を培養する方法に加えて、本発明は、OS培地中で培養された細胞において、タンパク質、例えば、治療的に有効な抗体または他のバイオ医薬品薬物物質を生成する方法を提供する。
改善された生存細胞培養物密度
250mL振盪フラスコに、CHO K1から誘導した組換え抗体生成細胞株の種培養物を接種した。接種した細胞を、36.5℃で7日間増殖させ、3日目および5日目にグルコースを供給した。細胞を、2つの別々の化学的に規定された(加水分解物を含まない無血清の)培地の各々において増殖させた。第1の培地は、約75mMのアミノ酸を含み(培地1)、第2の培地は、約40mMのアミノ酸を含み(培地2)、両方の処方が、2.5μM(0.4mg/L)以下のプトレシンを含んだ。別の群の培地条件を、7.5g/Lの濃度のダイズ加水分解物を培地2に添加することによって生成した。3つの対照培地の各々に、約593μMのオルニチン(100mg/LのL−オルニチン・HClとして)、または約593μMのオルニチン(100mg/LのL−オルニチン・HClとして)および約714μMのプトレシン(115mg/Lのプトレシン・2HClとして)の組合せを添加した。3mL培養物のアリコートを、3日目、5日目および7日目に取り出し、生存細胞計数を、BioProfile FLEX(商標)機器(Nova Biomedical)でトリパンブルー排除を使用して実施した。0日目に、全ての培養物が、1mL当たり0.8×106の生存細胞を含んだ。所与の培地(培地1、培地2または培地2+ダイズ)について、7日の期間にわたる生存細胞計数により、オルニチン(ornitihine)またはオルニチン+プトレシンを補充した培地中で増殖したCHO細胞が、増加した生存細胞密度を有したことが明らかになった。この効果は、7日の期間の間、加水分解物を含まない培地において特に顕著であった(即ち、生存細胞密度における2倍〜4倍またはそれ超の増加)。加水分解物を含まないOS培地2は、ダイズ含有非OS培地2と同等に機能し、ダイズ加水分解物の細胞増殖利益がオルニチン置き換えによって複製できることを示す。オルニチンまたはオルニチンおよびプトレシンを培地2+ダイズに添加することによって増加した細胞密度もまた観察された。結果を表1に示す。
改善された細胞培養物の倍加時間
対数増殖期にある、CHO K1細胞から誘導した組換え抗体生成細胞株の倍加時間を、種々の細胞培養培地条件下で決定した。種訓練培養物を、3つの別々の培地:培地1、培地2、およびダイズ加水分解物を含む培地2(培地2+ダイズ)の各々において、14日間の期間にわたって250mLシェーカーフラスコ中で36.5℃で継代した。1mLのアリコートを、0日目および種訓練継代の時点(2日毎または3日毎)で各条件から取り出し、生存細胞計数を、CDV(商標)機器(Nova Biomedical)でトリパンブルー排除を使用して実施した。培地1を、未補充で、または100mg/Lのオルニチン・HClもしくは115mg/Lのプトレシン・2HClおよび100mg/Lのオルニチン・HClの両方を補充して試験した。低プトレシン・2HCl(0.4mg/L)を含む培地2を、未補充で、または100mg/Lのオルニチン・HClもしくは115mg/Lのプトレシン・2HClおよび100mg/Lのオルニチン・HClの両方を補充して試験した。結果を表3および4に示す。プトレシンありまたはなしのいずれかでの培地1へのオルニチン補充が、顕著な増殖を達成するために必要であった。オルニチンまたはオルニチン+プトレシンを、加水分解物を含まない培地2に補充することで、細胞倍加時間は約25%〜30%減少した。倍加時間はまた、加水分解物含有培地2へのオルニチンまたはオルニチン+プトレシンの添加の際に、より小さい程度まで低減された。
改善された抗体力価
オルニチンまたはオルニチン+プトレシンを含めることが培養物中の細胞増殖(proliferation)および生存細胞密度を改善することを確立してから、本発明者らは、組換えタンパク質生成力価に対するこれらの条件の影響をさらに調査した。本発明者らは、CHO−K1由来細胞株による組換えIgGの発現および分泌を試験した。この実験では、平均抗体力価を、種々の培地形式下の培養物中で7日目に決定した。上記のように、低いプトレシン(0.4mg/Lのプトレシン・2HCl)、オルニチン(100mg/Lのオルニチン・HCl)、ならびにオルニチンおよびプトレシンの両方(100mg/Lのオルニチン・HCl/115mg/Lのプトレシン・2HCl)を含む培地1を試験した。低いプトレシン(0.4mg/Lのプトレシン・2HCl)、オルニチン(100mg/Lのオルニチン・HCl)、ならびにオルニチンおよびプトレシンの両方(100mg/Lのオルニチン・HCl/115mg/Lのプトレシン・2HCl)を含む培地2および培地2+ダイズもまた試験した。全ての場合において、オルニチンまたはオルニチンおよび0.4mg/L超のレベルのプトレシンを含めることは、顕著により高いタンパク質力価、即ち、少なくとも約2倍高い力価を生じた。結果を表5に示す。
Claims (48)
- ≧0.09mM±0.014mMのオルニチンを含む、無血清である細胞培養培地。
- ≧0.20±0.03mMのプトレシンを含む、請求項1に記載の細胞培養培地。
- 0.09±0.014mM〜0.9±0.14mMのオルニチンを含む、請求項1および2のいずれか一項に記載の細胞培養培地。
- 0.09±0.014mM、0.3±0.05mM、0.6±0.09mMまたは0.9±0.14mMでオルニチンを含む、請求項1から3のいずれか一項に記載の細胞培養培地。
- 0.20±0.03mM〜0.714±0.11mMのプトレシンを含む、請求項1から4のいずれか一項に記載の細胞培養培地。
- 0.20±0.03mM、0.35±0.06または0.714±0.11mMでプトレシンを含む、請求項1から4のいずれか一項に記載の細胞培養培地。
- 加水分解物を含まない、請求項1から6のいずれか一項に記載の細胞培養培地。
- 化学的に規定されている、請求項1から6のいずれか一項に記載の細胞培養培地。
- ≧40±6mMのアミノ酸またはその塩の混合物を含む、請求項1から8のいずれか一項に記載の細胞培養培地。
- アミノ酸の前記混合物が、アラニン、アルギニン、アスパラギン、アスパラギン酸、システイン、グルタミン酸、グリシン、ヒスチジン、イソロイシン、ロイシン、リシン、メチオニン、フェニルアラニン、プロリン、セリン、スレオニン、トリプトファン、チロシンおよびバリンからなる、請求項9に記載の細胞培養培地。
- 1種または複数の脂肪酸を含む、請求項1から10のいずれか一項に記載の細胞培養培地。
- 前記1種または複数の脂肪酸が、リノール酸、リノレン酸、チオクト酸、オレイン酸、パルミチン酸、ステアリン酸、アラキジン酸、アラキドン酸、ラウリン酸、ベヘン酸、デカン酸、ドデカン酸、ヘキサン酸、リグノセリン酸、ミリスチン酸およびオクタン酸からなる群より選択される、請求項11に記載の細胞培養培地。
- ヌクレオシドの混合物を含む、請求項1から12のいずれか一項に記載の細胞培養培地。
- ヌクレオシドの前記混合物が、アデノシン、グアノシン、シチジン、ウリジン、チミジンおよびヒポキサンチンのうちの1種または複数を含む、請求項13に記載の細胞培養培地。
- アデノシン、グアノシン、シチジン、ウリジン、チミジンおよびヒポキサンチンを含む、請求項1から14のいずれか一項に記載の細胞培養培地。
- 1種または複数の二価カチオンを含む、請求項1から15のいずれか一項に記載の細胞培養培地。
- 前記二価カチオンが、マグネシウム、カルシウムまたはそれらの両方である、請求項16に記載の細胞培養培地。
- Ca2+およびMg2+を含む、請求項1から17のいずれか一項に記載の細胞培養培地。
- 細胞を培養するための方法であって、(a)請求項1から18のいずれか一項に記載の細胞培養培地を提供するステップ、および(b)前記細胞培養培地中で細胞を成長させるかまたは維持して、細胞培養物を形成するステップを含む、方法。
- 前記細胞が、哺乳動物細胞、鳥類細胞、昆虫細胞、細菌細胞および酵母細胞からなる群より選択される、請求項19に記載の方法。
- 前記細胞がCHO細胞である、請求項19または請求項20に記載の方法。
- 前記細胞が目的のタンパク質を発現する、請求項19から21のいずれか一項に記載の方法。
- 前記目的のタンパク質が抗原結合性タンパク質である、請求項22に記載の方法。
- 前記目的のタンパク質がFcドメインを含む、請求項22または23に記載の方法。
- 前記目的のタンパク質が受容体−Fc−融合タンパク質である、請求項22から24のいずれか一項に記載の方法。
- 前記受容体−Fc−融合タンパク質がtrapタンパク質である、請求項25に記載の方法。
- 前記trapタンパク質が、IL−1アンタゴニストまたはVEGFアンタゴニストである、請求項26に記載の方法。
- 前記目的のタンパク質が、抗体または抗体断片である、請求項22または23に記載の方法。
- 前記抗体または前記抗体断片が、組換えヒト抗体またはその断片である、請求項28に記載の方法。
- 前記細胞が、≦30時間の平均倍加時間を有する、請求項19から29のいずれか一項に記載の方法。
- 前記細胞が、≦24時間の平均倍加時間を有する、請求項19から30のいずれか一項に記載の方法。
- 前記細胞が、<0.3±0.045mMのオルニチンおよび<0.2±0.03mMのプトレシンを含む細胞培養培地において増殖した細胞の平均倍加時間の少なくとも3分の1である平均倍加時間を有する、請求項19から31のいずれか一項に記載の方法。
- 前記細胞培養物が、<0.09±0.014mMのオルニチンおよび<0.2±0.03mMのプトレシンを含む培地中の類似の細胞培養物よりも少なくとも15%大きい生存細胞計数密度に達することが可能である、請求項19から32のいずれか一項に記載の方法。
- 前記細胞培養物が、<0.09±0.014mMのオルニチンおよび<0.2±0.03mMのプトレシンを含む類似の細胞培養培地中の類似の細胞培養物よりも少なくとも3倍大きい生存細胞計数密度に達することが可能である、請求項19から33のいずれか一項に記載の方法。
- 1種または複数のユースポイント添加物を、前記細胞培養培地に添加するステップを含む、請求項19から34のいずれか一項に記載の方法。
- 前記ユースポイント添加物が、NaHCO3、グルタミン、インスリン、グルコース、CuSO4、ZnSO4、FeCl3、NiSO4、Na4 EDTAおよびクエン酸Na3のうちの1種または複数を含む、請求項35に記載の方法。
- NaHCO3、グルタミン、インスリン、グルコース、CuSO4、ZnSO4、FeCl3、NiSO4、Na4 EDTAおよびクエン酸Na3の各々が、ユースポイント添加物として前記培地に添加される、請求項35または36に記載の方法。
- タンパク質を生成するための方法であって、前記方法は、(a)目的のタンパク質をコードする配列を含む核酸を細胞中に導入するステップ;(b)前記核酸を保有する細胞を選択するステップ;(c)請求項1から18のいずれか一項に記載の細胞培養培地において、または請求項19から37のいずれか一項に記載の方法に従って、選択された前記細胞を培養するステップ;および(d)前記細胞において前記目的のタンパク質を発現させるステップを含み、前記目的のタンパク質が前記培地中に分泌される、方法。
- 前記細胞が、CHO細胞、293細胞またはBHK細胞である、請求項38に記載の方法。
- 前記目的のタンパク質が抗原結合性タンパク質である、請求項38または39に記載の方法。
- 前記目的のタンパク質がFcドメインを含む、請求項38から40のいずれか一項に記載の方法。
- 前記目的のタンパク質が、受容体−Fc−融合タンパク質(TRAP)、可溶性TCR−Fc融合タンパク質、抗体、Fc−融合タンパク質およびScFvタンパク質からなる群より選択される、請求項38から41のいずれか一項に記載の方法。
- 前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも7%大きい平均7日目力価で生成される、請求項38から42のいずれか一項に記載の方法。
- 前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも14%大きい平均7日目力価で生成される、請求項38から43のいずれか一項に記載の方法。
- 前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも80%大きい平均7日目力価で生成される、請求項38から44のいずれか一項に記載の方法。
- 前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも2倍大きい平均7日目力価で生成される、請求項38から45のいずれか一項に記載の方法。
- 前記目的のタンパク質が、0.09±0.014mM未満のオルニチンおよび0.2±0.03mM未満のプトレシンを含む細胞培養培地中の類似の細胞によって生成される平均7日目力価よりも少なくとも3倍大きい平均7日目力価で生成される、請求項38から46のいずれか一項に記載の方法。
- 前記目的のタンパク質が組換えヒト抗体である、請求項38から47のいずれか一項に記載の方法。
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