JP6793114B2 - フューリンを分泌する哺乳動物の発現系における、完全に処理され機能的な第x因子の産生 - Google Patents
フューリンを分泌する哺乳動物の発現系における、完全に処理され機能的な第x因子の産生 Download PDFInfo
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Description
実施例1 所定のレベルのフューリンによる完全に処理され完全に活性型の組換え第X因子の産生
CHO−DG44トランスフェクションプール(A)、CHO−Sトランスフェクションプール(B)、およびCHO−S単細胞由来のクローン(C)を含む、ヒトFXのためのCHOに基づく異種発現系を基準として使用し、異なるトランスフェクション方針に続く、ヒトFX処理におけるフューリン発現の効果を調査した。クローン同様、トランスフェクションプールは、さらに、調査に影響のないVKORを発現した。
Claims (16)
- ヒトフューリンをコードする第1のヌクレオチド配列とヒト第X因子をコードする第2のヌクレオチド配列とを含む形質転換細胞であって、
前記形質転換細胞は、機能的フューリン及びヒト第X因子を発現し、培養液上清に分泌しており、
前記フューリンは、36〜78時間の培養後、前記培養液上清において50U/mL〜300U/mLの濃度で分泌され、少なくとも85%のヒト第X因子が完全に処理される、形質転換細胞。 - 前記機能的フューリンは、前記培養液上清において60U/mL〜300U/mLの濃度で分泌される、請求項1に記載の形質転換細胞。
- 前記形質転換細胞により産生される少なくとも90%の前記第X因子が完全に処理される、請求項2に記載の形質転換細胞。
- 前記機能的フューリンは、前記培養液上清において90U/mL〜300U/mLの濃度で分泌される、請求項1に記載の形質転換細胞。
- 前記形質転換細胞により産生される少なくとも95%の前記第X因子が完全に処理される、請求項4に記載の形質転換細胞。
- 前記細胞が、チャイニーズハムスターの卵巣(CHO)細胞、ヒト胎児由来腎臓細胞、霊長類腎臓細胞、線維芽細胞、およびマウス骨髄腫細胞からなる群から選択される、請求項1〜5のいずれか1項に記載の形質転換細胞。
- ビタミンKエポキシドレダクターゼ(VKOR)をコードする、外因性のヌクレオチド配列を更に含む、請求項1〜7のいずれか1項に記載の形質転換細胞。
- 形質転換細胞を産生する方法であって、
哺乳動物タンパク質の発現に適した細胞に、前記細胞によるヒトフューリンの発現に適応する第1の発現ベクター、および前記細胞による第X因子の発現に適応する第2のベクターでトランスエフェクトすることと、ここで前記第1の発現ベクターはヒトフューリンをコードするヌクレオチド配列を含み、前記第2の発現ベクターは第X因子をコードするヌクレオチド配列を含んでおり、
前記第1および第2の発現ベクターをトランスフェクトされ、36〜78時間の培養後、培養液上清において50U/mL〜300U/mLの濃度で機能的ヒトフューリンを発現し、分泌する、少なくとも85%の第X因子が完全に処理される細胞を選択することと、
を含む、方法。 - 前記選択することが、前記第1および第2の発現ベクターをトランスフェクトされ、42〜72時間の培養後、培養液上清において50U/mL〜300U/mLの濃度で機能的ヒトフューリンを発現し、分泌する細胞を選択することによって実施される、請求項8に記載の方法。
- 前記第1の発現ベクターおよび/または前記第2の発現ベクターが非ウイルスの発現ベクターである、請求項8または9に記載の方法。
- 前記第1の発現ベクターおよび/または前記第2の発現ベクターがウイルスの発現ベクターである、請求項8または9に記載の方法。
- 前記細胞は、前記第1の発現ベクターおよび前記第2の発現ベクターをほぼ同時にトランスフェクトされる、請求項8〜11のいずれか1項に記載の方法。
- 前記細胞は、前記第1の発現ベクターをトランスフェクトされ、前記第2の発現ベクターを前記細胞にトランスフェクトする前に、フューリンを安定したレベルで分泌する細胞が得られるか、または
前記細胞は、前記第2の発現ベクターをトランスフェクトされ、前記第1の発現ベクターを前記細胞にトランスフェクトする前に、タンパク質を安定したレベルで分泌する細胞が得られる、請求項8〜11のいずれか1項に記載の方法。 - 前記細胞が、チャイニーズハムスターの卵巣(CHO)細胞、ヒト胎児由来腎臓細胞、霊長類腎臓細胞、線維芽細胞、およびマウス骨髄腫細胞からなる群から選択される、請求項8〜13のいずれか1項に記載の方法。
- ビタミンKエポキシドレダクターゼ(VKOR)をコードする、ヌクレオチド配列を含む第3の発現ベクターで細胞にトランスフェクトすることを更に含む、請求項8〜14のいずれか1項に記載の方法。
- 成熟型で完全に処理された第X因子を産生する方法であって、
請求項1〜7のいずれか1項に記載される形質転換細胞を培養して、成熟型で完全に処理された第X因子を産生することと、
培養上清から第X因子を単離することと、
を含む、方法。
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