JP2023052471A - 糖タンパク質を作製するための細胞培養方法 - Google Patents
糖タンパク質を作製するための細胞培養方法 Download PDFInfo
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- ornithine
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Abstract
Description
2018年2月1日に作成され、11.2KBのサイズの、「REGE009P02US_SeqList.txt」という名前の提出されたテキストの内容は、参照によりその全体が本明細書に組み込まれる。
別段規定されない限り、本出願で使用されるすべての技術用語及び科学用語は、この発明が属する技術分野の当業者によって一般に理解されるのと同じ意味を有する。
「加水分解産物」は、植物材料、動物材料、乳清、酵母などの加水分解に由来する複合材料である。用語「加水分解産物」は、「タンパク質加水分解産物」と互換的に使用される。「植物加水分解産物」(植物タンパク質加水分解産物)は、加水分解された植物材料、例えば、コメ粉、コムギ粉、トウモロコシ粉、ダイズ粉などである。タンパク質加水分解産物は、3つの一般的方法、すなわち、酸加水分解、アルカリ加水分解及び酵素的加水分解によって、製造することができる。生物治療剤の製造を含めた生物学的用途のために、タンパク質加水分解産物は、酵素的加水分解によってたいてい作製される。例えば、ペプシン消化によって作製されるダイズ加水分解産物は「ダイズペプトン」と呼ぶことができ、またはトリプシン消化によって作製される酵母加水分解産物は「酵母トリプトン」と呼ぶことができる。Franek et al.,Biotechnol.Prog.16(5):688-92(2000)は、植物タンパク質加水分解産物及びその製造方法について、本明細書に組み込まれる。
本開示は、上記のダイズ加水分解産物の選択されたバッチを使用して、細胞培養培地中で目的のタンパク質を発現する細胞を培養するための方法を提供する。本開示は、細胞培養培地における、5.0mg/Lのオルニチンまたはそれ以下を含むダイズ加水分解産物の選択されたバッチの使用が、ロット間の変動性を低減し、タンパク質生成物の品質を向上させることを初めて発見した。本開示は、細胞培養培地における、5.0mg/Lのプトレシンまたはそれ以下を含むダイズ加水分解産物の選択されたバッチの使用が、ロット間の変動性を低減し、タンパク質生成物の品質を向上させることを初めて発見した。
目的のタンパク質は、当業者に既知の方法を使用して、宿主細胞によって発現させることができる。一般に、哺乳動物細胞における発現に適した任意の目的のタンパク質を本方法によって生成することができるが、糖タンパク質は、本方法から特に恩恵を受けるであろう。例えば、具体的な実施形態では、目的のタンパク質は抗体もしくはその抗原結合性断片、二重特異性抗体もしくはその断片、キメラ抗体もしくはその断片、ScFvもしくはその断片、Fcタグ化タンパク質(例えば、トラップタンパク質)もしくはその断片、増殖因子もしくはその断片、サイトカインもしくはその断片、または細胞表面レセプターの細胞外ドメインまたはその断片である。
糖タンパク質上の特定のN結合型糖鎖の程度及び分布は、オリゴ糖プロファイリングによって確認することができる。一実施形態では、糖タンパク質はペプチド:N-グリコシダーゼF(PNGase F)によって脱グリコシル化されて、アスパラギン側鎖からN結合型オリゴ糖が切断され、除去される。次いで、オリゴ糖が蛍光試薬、例えばアントラニル酸で誘導体化される。次いで、糖鎖が順相陰イオン交換HPLCによって分離され、蛍光検出器で検出され、HPLCクロマトグラムが生成される。
ダイズ加水分解産物試料を秤量し、その20グラム部を1Lの水に溶解して、20g/Lの出発濃度にした。次いで、得られたダイズ加水分解産物溶液をさらに水に希釈して、細胞培養で使用するための所望の濃度にし、得られたダイズ加水分解産物溶液の分子組成を、クロマトグラフィーを使用することによって決定した。
生成されるタンパク質の品質にどのアミノ酸成分が影響を及ぼすかを決定するために、トラップタンパク質(受容体-Fc融合タンパク質、VEGF-トラップ)を発現するCHO細胞を、様々な量のオルニチン、プトレシン及びシトルリンまたはこれらの組み合わせを含むダイズ加水分解産物を含む独自開発の培地中で培養した。表2は、シトルリン濃度と関係なく、5.0mg/L未満の濃度のオルニチンを含むダイズ加水分解産物が補充された培地におけるCHO細胞の培養の結果として生成されたタンパク質ロットについて、重要なN-グリカンに対する曲線下面積の増大として示されるように、加水分解産物中のオルニチンのレベルがタンパク質生成ロットの品質と負に相関することを示す。
16個のダイズ加水分解産物ロットを、リロナセプトのCHO細胞生成のメタボロミクスに影響を及ぼすそれらの能力について試験した。およそ426個のダイズ加水分解産物分析物を測定し、最終的な糖タンパク質力価及びラクテート代謝と比較した。図5は、ダイズ加水分解産物分析物と最大ラクテート及び最終的な糖タンパク質力価との間の相関のローディングプロットを示す。ラクテート及び糖タンパク質力価の決定は、ダイズ加水分解産物中のオルニチンの負の相関を示す。
図6A及び6Bは、それぞれ細胞増殖及びグリコシル化に対するオルニチン及びプトレシンの影響を実証するためにオルニチンまたはプトレシンのいずれかがスパイクされた、対照培地及びフィード条件の下での、CHO細胞培養を示す。表6Bは、特に著しいピーク11における影響を強調表示する。
Claims (32)
- ダイズ加水分解産物を含む細胞培養培地中で組換え異種糖タンパク質を発現する細胞の集団を培養して、前記組換え異種糖タンパク質を生成することを含む方法であって、前記ダイズ加水分解産物が、≦0.067%(w/w)のオルニチンまたはプトレシンを含む、前記方法。
- 前記細胞の集団が、組換え異種糖タンパク質を発現する細胞のクローン性増殖によって得られる、請求項1に記載の方法。
- 前記ダイズ加水分解産物が0.003%~0.027%(w/w)のオルニチンまたはプトレシンを含む、請求項1~2のいずれか1項に記載の方法。
- 前記培養培地が≦5mg/Lのオルニチンまたはプトレシンを含む、請求項1~3のいずれか1項に記載の方法。
- 前記培養培地が0.6~3mg/Lのオルニチンまたはプトレシンを含む、請求項1~4のいずれか1項に記載の方法。
- 前記糖タンパク質がトラップ分子である、請求項1~5のいずれか1項に記載の方法。
- 前記トラップ分子がエタネルセプト、リロナセプト及びアフリベルセプトからなる群から選択される、請求項6に記載の方法。
- 前記糖タンパク質がA1 N-グリカン及び少なくとも1つの他のN-グリカン種を含み、A1 N-グリカンの相対量が前記糖タンパク質の全N-グリカン種の総量の≧10%(w/w)である、請求項1~7のいずれか1項に記載の方法。
- a.グリコシル化タンパク質を発現する細胞を細胞培養培地中で培養して、前記糖タンパク質を生成すること、
b.前記グリコシル化タンパク質を精製すること、
c.前記精製したグリコシル化タンパク質をオリゴ糖フィンガープリント解析にかけること、
d.前記糖タンパク質のN-グリカン種の総量と比較して、A1 N-グリカンの相対量を決定すること、及び
e.前記糖タンパク質のN-グリカン種の総量と比較して、少なくとも10%(w/w)のA1 N-グリカンを提供するダイズ加水分解産物を選択すること
を含む方法。 - 前記選択されたダイズ加水分解産物が≦0.067%(w/w)のオルニチンまたはプトレシンを含む、請求項9に記載の方法。
- 前記選択されたダイズ加水分解産物が0.003%~0.027%(w/w)のオルニチンまたはプトレシンを含む、請求項9または10に記載の方法。
- 前記培養培地が0.6~3mg/Lのオルニチンまたはプトレシンを含む、請求項9~11のいずれか1項に記載の方法。
- 前記糖タンパク質がトラップ分子である、請求項9~12のいずれか1項に記載の方法。
- 前記トラップ分子がエタネルセプト、リロナセプト及びアフリベルセプトからなる群から選択される、請求項13に記載の方法。
- 前記糖タンパク質が、糖タンパク質1モルあたり8~12モルのシアル酸、または糖タンパク質1モルあたり35~65モルのシアル酸を含む、請求項9~14のいずれか1項に記載の方法。
- 糖タンパク質の製造で使用するためのダイズ加水分解産物を選択する方法であって、
a.ダイズ加水分解産物中のオルニチンまたはプトレシンの量を測定すること、
b.≦0.067%(w/w)のオルニチンまたはプトレシンを有するダイズ加水分解産物を選択すること、及び
c.前記選択されたダイズ加水分解産物をさらなる成分と組み合わせて、≦5mg/Lのオルニチンまたはプトレシンを有する細胞培養培地を形成すること
を含む、前記方法。 - 前記選択されたダイズ加水分解産物が0.003%~0.027%(w/w)のオルニチンまたはプトレシンを含む、請求項16に記載の方法。
- 前記培養培地が0.6~3mg/Lのオルニチンまたはプトレシンを含む、請求項16または17に記載の方法。
- 前記糖タンパク質がトラップ分子である、請求項16~18のいずれか1項に記載の方法。
- 前記トラップ分子がエタネルセプト、リロナセプト及びアフリベルセプトからなる群から選択される、請求項19に記載の方法。
- 前記糖タンパク質がA1 N-グリカン及び少なくとも1つの他のN-グリカン種を含み、A1 N-グリカンの相対量が前記糖タンパク質の全N-グリカン種の総量の≧10%(w/w)である、請求項16~20のいずれか1項に記載の方法。
- A1 N-グリカン及び少なくとも1つの他のN-グリカン種を含む糖タンパク質であって、前記A1 N-グリカンの相対量が前記糖タンパク質のN-グリカンの総量の少なくとも10%(w/w)である、前記糖タンパク質。
- 前記糖タンパク質がトラップ分子である、請求項22に記載の糖タンパク質。
- 前記トラップ分子がエタネルセプト、リロナセプト及びアフリベルセプトからなる群から選択される、請求項23に記載の糖タンパク質。
- 前記糖タンパク質がA2 N-グリカン、A2F N-グリカン、A1F N-グリカン、NGA2F N-グリカン、NA2G1F N-グリカン、NA2 N-グリカン及びNA2F N-グリカンをさらに含む、請求項22に記載の糖タンパク質。
- 前記A1 N-グリカンの相対量が、キャピラリー電気泳動によって得られるオリゴ糖フィンガープリントの前記A1 N-グリカンのピーク下の面積を全N-グリカンに対するピーク下の全面積と比較することによって決定される、請求項22~25のいずれか1項に記載の糖タンパク質。
- 前記A1 N-グリカンの相対量が10%~17%(w/w)である、請求項22~26のいずれか1項に記載の糖タンパク質。
- 前記糖タンパク質が、糖タンパク質1モルあたり35~65モルのシアル酸を有するリロナセプトである、請求項24に記載の糖タンパク質。
- 前記リロナセプトが配列番号1の残基N37、N98、N418及びN511のいずれか1つまたは複数にA1 N-グリカンを含む、請求項28に記載の糖タンパク質。
- 前記糖タンパク質が、糖タンパク質1モルあたり8~12モルのシアル酸を有するアフリベルセプトである、請求項24に記載の糖タンパク質。
- 前記アフリベルセプトが配列番号2の残基N123及びN196のいずれか1つまたは複数にA1 N-グリカンを含む、請求項30に記載の糖タンパク質。
- a.残基を含まない反応器中でダイズ抽出物を酵素消化して、ダイズ加水分解産物を製造すること、
b.前記ダイズ加水分解産物中のオルニチンまたはプトレシンの量を測定すること、及び
c.細胞培養培地で使用するための、≦0.067%(w/w)のオルニチンまたはプトレシンを有するダイズ加水分解産物を選択すること
を含む方法。
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AU2023202659A1 (en) | 2023-05-18 |
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JP7265494B2 (ja) | 2023-04-26 |
JP2021166537A (ja) | 2021-10-21 |
EP3649144A1 (en) | 2020-05-13 |
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SG11201912548XA (en) | 2020-01-30 |
US20200255880A1 (en) | 2020-08-13 |
CA3067847A1 (en) | 2019-01-10 |
EP3649144A4 (en) | 2021-07-21 |
AU2021229121A1 (en) | 2021-09-30 |
US20190010531A1 (en) | 2019-01-10 |
KR20210084695A (ko) | 2021-07-07 |
KR20240055885A (ko) | 2024-04-29 |
TW201934570A (zh) | 2019-09-01 |
IL271524A (en) | 2020-02-27 |
US20210388408A1 (en) | 2021-12-16 |
EP3967765A1 (en) | 2022-03-16 |
WO2019010191A1 (en) | 2019-01-10 |
MX2020000228A (es) | 2020-08-10 |
BR112020000127A2 (pt) | 2020-07-07 |
JP2020526196A (ja) | 2020-08-31 |
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