JP6650011B2 - 細胞培養培地 - Google Patents
細胞培養培地 Download PDFInfo
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- JP6650011B2 JP6650011B2 JP2018208858A JP2018208858A JP6650011B2 JP 6650011 B2 JP6650011 B2 JP 6650011B2 JP 2018208858 A JP2018208858 A JP 2018208858A JP 2018208858 A JP2018208858 A JP 2018208858A JP 6650011 B2 JP6650011 B2 JP 6650011B2
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- Prior art keywords
- cell culture
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- amino
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- 239000011653 vitamin D2 Substances 0.000 description 1
- MECHNRXZTMCUDQ-RKHKHRCZSA-N vitamin D2 Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)/C=C/[C@H](C)C(C)C)=C\C=C1\C[C@@H](O)CCC1=C MECHNRXZTMCUDQ-RKHKHRCZSA-N 0.000 description 1
- 235000005282 vitamin D3 Nutrition 0.000 description 1
- 239000011647 vitamin D3 Substances 0.000 description 1
- QYSXJUFSXHHAJI-YRZJJWOYSA-N vitamin D3 Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)CCCC(C)C)=C\C=C1\C[C@@H](O)CCC1=C QYSXJUFSXHHAJI-YRZJJWOYSA-N 0.000 description 1
- 235000019165 vitamin E Nutrition 0.000 description 1
- 239000011709 vitamin E Substances 0.000 description 1
- 229940046009 vitamin E Drugs 0.000 description 1
- 235000019168 vitamin K Nutrition 0.000 description 1
- 239000011712 vitamin K Substances 0.000 description 1
- 150000003721 vitamin K derivatives Chemical class 0.000 description 1
- 235000019143 vitamin K2 Nutrition 0.000 description 1
- 239000011728 vitamin K2 Substances 0.000 description 1
- 229940045997 vitamin a Drugs 0.000 description 1
- 229940046008 vitamin d Drugs 0.000 description 1
- 229940021056 vitamin d3 Drugs 0.000 description 1
- 229940046010 vitamin k Drugs 0.000 description 1
- 229940041603 vitamin k 3 Drugs 0.000 description 1
- 239000008215 water for injection Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 description 1
- GVJHHUAWPYXKBD-IEOSBIPESA-N α-tocopherol Chemical compound OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-IEOSBIPESA-N 0.000 description 1
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Description
別の好ましい実施形態において、システインの誘導体は、(S)−2−アミノ−3−スルホスルファニルプロパン酸またはその塩である。
好ましい実施形態において、チロシンのリン酸化された誘導体は、(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸二ナトリウム塩である。
好ましい実施形態において、システインのスルホン化誘導体は、(S)−2−アミノ−3−スルホスルファニルプロパン酸ナトリウム塩である。
別の好ましい実施形態において、細胞培養培地はフィード(供給)培地である。
別の好ましい実施形態において、細胞培養培地は、8.5またはそれ以下のpHを有し、5〜40mmol/lの間、好ましくは10〜30mmol/lの間の濃度のチロシンおよび/またはシステインの少なくとも1つの無機エステル誘導体を含む液体培地である。
好ましい実施形態において、液体培地のpHは、6.5〜8.5の間、最も好ましくは6.8〜7.8の間である。
a)L−チロシンおよび/またはL−システインの1つまたは複数の無機エステル誘導体を細胞培養培地の他の成分と混合すること、
b)工程a)の混合物を粉砕に供すること
により、本発明による細胞培養培地を生成するための方法を対象とする。
a)バイオリアクターを準備すること、
b)培養する細胞を、本発明による細胞培養培地と混合すること、
c)工程b)の混合物をインキュベートすること
により、細胞を培養するためのプロセスを対象とする。
− バイオリアクターに細胞および水性細胞培養培地を充填すること、
− バイオリアクター中で細胞をインキュベートすること、
− バイオリアクター中の細胞のインキュベーションの全時間にわたり連続的に、または前記インキュベーション時間内の1回もしくは数回、バイオリアクターに細胞培養培地(この場合はフィード培地である)を添加すること
により、バイオリアクター中で細胞を培養するための流加プロセスであって、
フィード培地は、pH8.5未満のpHを有し、チロシンおよび/またはシステインの少なくとも1つの無機エステル誘導体を含む、流加プロセスを対象とする。
XおよびYは、互いに独立に、H、Li、Na、K、1/2Ca、1/2Mg、好ましくはH、Na、Kである。プロピオン酸という用語の代わりにプロパン酸という用語も使用することができる。
ジェットミルは、圧縮ガスを使用して粒子を加速させることにより、粒子をプロセスチャンバー中で互いに衝突させる。ジェットミルは、例えば、Sturtevant(米国)またはPMT(オーストリア)により販売されている。
Fitzpatrick(米国)により商品化されたフィッツミルは、粉砕用のブレードを備えたローターを使用している。
チロシンは、L−またはD−チロシン、好ましくはL−チロシンを意味する。
システインは、L−またはD−システイン、好ましくはL−システインを意味する。
L−アスパラギン一水和物
L−イソロイシン
L−フェニルアラニン
L−グルタミン酸ナトリウム一水和物
L−ロイシン
L−スレオニン
L−リジン一塩酸塩
L−プロリン
L−セリン
L−アルギニン一塩酸塩
L−ヒスチジン一塩酸塩一水和物
L−メチオニン
L−バリン
L−アスパラギン酸一ナトリウム一水和物
L−トリプトファン
塩化コリン
ミオイノシトール
ニコチンアミド
D(+)パントテン酸カルシウム
ピリドキシン塩酸塩
チアミン塩化物塩酸塩
ビタミンB12(シアノコバラミン)微粉化
ビオチン
葉酸
リボフラビン
硫酸マグネシウム無水物
硫酸銅(II)五水和物
硫酸亜鉛七水和物
1,4−ジアミノブタン二塩酸塩(DIHYDRCHLORIDE)
ヘプタモリブデン酸アンモニウム四水和物
硫酸カドミウム水和物
塩化マンガン(II)四水和物
塩化ニッケル(II)六水和物
メタケイ酸ナトリウム
メタバナジン酸ナトリウム
塩化スズ(II)二水和物
亜セレン酸ナトリウム(約45%SE)
リン酸二水素ナトリウム一水和物
クエン酸鉄(III)アンモニウム(約18%FE)。
a)バイオリアクターを準備すること、
b)培養する細胞を、本発明による細胞培養培地と混合すること、
c)工程b)の混合物をインキュベートすること
により、細胞を培養する方法を対象とする。
好ましい実施形態において、pHは6.8〜8.4の間である。
− バイオリアクターに細胞および水性細胞培養培地を充填すること、
− バイオリアクター中で細胞をインキュベートすること、
− バイオリアクター中の細胞のインキュベーションの全時間にわたり連続的に、または
前記インキュベーション時間内の1回もしくは数回、バイオリアクターに細胞培養培地(
この場合はフィード培地である)を添加すること
により、バイオリアクター中で細胞を培養するための流加方法であって、
フィード培地は、好ましくは、pH8.5未満のpHを有し、チロシンおよび/またはシステインの少なくとも1つの無機エステル誘導体を含む、流加プロセスを対象とする。典型的には、フィード培地は、溶媒中に溶解される固形成分を100〜150g/lの間で含む。
例1 (S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸およびその塩の合成
文献(P.F.Alewood,R.B.Johns,R.M.Valerio,Synthesis 1983,30.)に従い、L−チロシンから開始して(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸が合成され、続いてその塩に転換される。図1は、二ナトリウム塩の合成の反応スキームを示す。
構造:
構造:
構造:
構造:
構造:
構造:
文献(*S.Futaki,T.Taike,T.Yagami,T.Ogawa,T.Akita,K.Kitagawa,J:Chem.Soc.Perkin Trans. I 1990,1739.)に従い、L−チロシンから開始して(S)−2−アミノ−3−(4−スルホノオキシ−フェニル)−プロピオン酸を合成し、続いてその塩への可能な転換を行うことができる。図2は、ナトリウム塩の合成の反応スキームを示す。
水中でのL−チロシン(化合物D1)、(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸(化合物D2)、(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸ナトリウム塩(化合物D3)、および(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸二ナトリウム塩(化合物D4)の溶解性を、20、25、および30℃で試験する。表1は結果を示す。
ダルベッコ改変イーグル培地は、DMEMとしても公知であり、動物細胞を成長させるためにしばしば使用される培地である。DMEMの成分はmg/lで表す:
無機塩:
CaCl2(無水):200.00
Fe(NO3)・9H2O:0.10
KCl:400.00
MgSO4(無水):97.67
NaCl:6400.00
NaH2PO4・H2O:125.00
他の成分:
D−グルコース:4500.00
ピルビン酸ナトリウム:110.00
プルロニック:1000.00
Hepes:15mM
アミノ酸:
L−アルギニン・HCl:84.00
L−シスチン・2HCl:63.00
L−グルタミン:584.00
グリシン:30.00
L−ヒスチジンHCl・H2O:42.00
L−イソロイシン:105.00
L−ロイシン:105.00
L−リシンHCl:146.00
L−メチオニン:30.00
L−フェニルアラニン:66.00
L−セリン:42.00
L−スレオニン:95.00
L−トリプトファン:16.00
L−チロシン2Na・2H2O:248.00
L−バリン:94.00
ビタミン:
D−パントテン酸カルシウム:4.00
塩化コリン:4.00
葉酸:4.00
i−イノシトール:7.20
ナイアシンアミド:4.00
リボフラビン:0.40
チアミン・HCl:4.00。
例5
この実験についてのデータを図3に示す。チロシンがPTyr塩により置き換えられた化学組成が明確な培地中でのバッチ実験。PTyrは、(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸塩を意味する。使用されるPTyrの濃度が、培地中のチロシンの濃度と同じであった場合、細胞は成長しなかった(示さず)。CDMに4.5mM(コントロール中での1mMに対し)の濃度で溶解した場合、細胞は成長することができ、コントロールにおけるさらにより高い最大生存細胞密度および全体的に延長した成長(2日間)を示した。後の分析によって、初期成長が、PTyr誘導体合成(合成不純物5%(w/w))に由来する遊離チロシンを通じて可能であることが示された。延長した成長は、遊離チロシンおよびリン酸中でのその代謝的切断後のPTyrの直接的な効果に起因しうる。
この実験についてのデータを図4に示す。システインがS−スルホシステインナトリウム塩(等濃度)により置き換えられた化学組成が明確な培地中でのバッチ実験。基礎として使用したCDM粉末は、システインおよびシスチンが枯渇しており、コントロール条件(1.5および3mM)の場合はシステインが、または試験条件(1.5および3mM)の場合はS−スルホシステインナトリウム塩が復元の間に補充された。システインまたはS−スルホシステインナトリウム塩を含む、化学組成が明確な培地で培養した場合、細胞は、同程度の成長を示し、S−スルホシステインナトリウム塩をシステインの代わりとして使用することができることが示された。
図5および図6は、流加プロセスにおける経時的な生存細胞密度およびIgG濃度を示す。組換えCHO細胞を、化学組成が完全に明確な基礎培地中で成長させ、pH7.0でのリン酸化Tyr塩を含むフィードを3;5、7、9日目に添加する(3%;6%、6%、6%の%v/vの添加)。条件1はPTyr二ナトリウム塩に対応し、条件2はPTyrカリウム塩に対応し、条件3はPTyrマグネシウム塩に対応し、中性PHフィード中での30mMの濃度で可溶化される。これらの場合において、システインは、依然として、pH11で別々のフィードとして添加される。
図7および8は、流加プロセスにおける経時的な生存細胞密度およびIgG濃度を示す。組換えCHO細胞は、化学組成が完全に明確な基礎培地およびpH7.0でS−スルホシステインおよびpTyr2Na+の両方を含むフィード中で成長させる。フィードは、3;5、7、9、14日目に添加する(3%;6%、6%、6%、3%の%v/vの添加)。この工程は、37℃、pH7.0、50%溶解酸素、撹拌140rpmでの1.2Lバイオリアクター中で実施する。コントロールについては、現況技術に従い、チロシン2Na+およびシステインは、別々のフィード中のpH11で可溶化し、3;5;7;9、14日目に、0.3%、0.6%、0.6%、0.6%、0.3%の%(V/V)で加える。グルコース濃度を毎日測定し、それに従い、>2g/Lの濃度を維持するように調節する。
Claims (12)
- 溶媒を用いて溶解することによって、液体培地形状の細胞培養培地の調製に使用される、化学的に定義される乾燥粉末細胞培養培地であって、
該化学的に定義される乾燥粉末細胞培養培地は、(S)−2−アミノ−3−スルホスルファニルプロパン酸および/またはその塩を含有しており、
該化学的に定義される乾燥粉末細胞培養培地を、溶媒を用いて溶解することによって、調製される、前記液体培地形状の細胞培養培地は、6.8〜8.4の間のpHを有し、そして、5〜40mmol/lの間の濃度で、(S)−2−アミノ−3−スルホスルファニルプロパン酸を含んでいる
ことを特徴とする、化学的に定義される乾燥粉末細胞培養培地。 - 前記(S)−2−アミノ−3−スルホスルファニルプロパン酸の塩は、(S)−2−アミノ−3−スルホスルファニルプロパン酸ナトリウム塩である、ことを特徴とする、請求項1に記載の化学的に定義される乾燥粉末細胞培養培地。
- 前記化学的に定義される乾燥粉末細胞培養培地を溶媒中に溶解して得られる、前記液体培地形状の細胞培養培地が、10〜30mmol/lの間の濃度で、(S)−2−アミノ−3−スルホスルファニルプロパン酸を含む、
ことを特徴とする、請求項1または2に記載の化学的に定義される乾燥粉末細胞培養培地。 - 前記化学的に定義される乾燥粉末細胞培養培地が、(S)−2−アミノ−3−(4−ホスホノオキシ−フェニル)−プロピオン酸および/またはその塩をさらに含有する、
ことを特徴とする、請求項1〜3のいずれか一項に記載の化学的に定義される乾燥粉末細胞培養培地。 - 請求項1〜5のいずれか一項に記載の化学的に定義される乾燥粉末細胞培養培地を生成する方法であって、
該方法は、
a)(S)−2−アミノ−3−スルホスルファニルプロパン酸および/またはその塩を、該化学的に定義される乾燥粉末細胞培養培地の他の成分と混合する工程;および
b)工程a)で得られる混合物を、乾燥条件下、粉砕に供する工程
とを含む
ことを特徴とする、方法。 - 工程b)は、ピンミル、フィッツミルまたはジェットミル中で実施される
ことを特徴とする、請求項6に記載の方法。 - 工程a)で得られる混合物は、粉砕に先立ち、0℃を下回る温度に冷却される
ことを特徴とする、請求項6または7に記載の方法。 - バイオリアクター中における、動物細胞の培養のための、流加プロセスであって、
該流加プロセスは、下記の工程を含み、
(i)バイオリアクター中に、動物細胞ならびに水性の化学的に定義される培地を添加する工程;
(ii)バイオリアクター中で、動物細胞をインキュベーションする工程;
(iii)バイオリアクター中の動物細胞のインキュベーションの全時間にわたり連続的に、または前記インキュベーション時間内の1回もしくは数回、液体培地形状のフィード培地を、バイオリアクターに供給する工程
前記液体培地形状のフィード培地は、請求項1〜5のいずれか一項に記載の化学的に定義される乾燥粉末細胞培養培地を、溶媒により溶解することで調製される、液体培地形状のフィード培地である
ことを特徴とする、流加プロセス。 - 前記溶解により得られる、液体培地形状のフィード培地は、6.8〜8.4の間のpHを有し、そして、5〜40mmol/lの間の濃度で、(S)−2−アミノ−3−スルホスルファニルプロパン酸を含んでいる
ことを特徴とする、請求項9に記載の流加プロセス。 - 前記溶解により得られる、液体培地形状のフィード培地は、10〜30mmol/lの間の濃度で、(S)−2−アミノ−3−スルホスルファニルプロパン酸を含んでいる
ことを特徴とする、請求項9または10に記載の流加プロセス。 - バイオリアクター中において培養される動物細胞は、CHO細胞である
ことを特徴とする、請求項9〜11のいずれか一項に記載の流加プロセス。
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