JP2021533759A - 癌抗原特異的cd8+t細胞を調製および凍結保存するための方法 - Google Patents
癌抗原特異的cd8+t細胞を調製および凍結保存するための方法 Download PDFInfo
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Abstract
Description
解決すべき課題
本発明は、癌抗原特異的CD8+T細胞を産生するための方法であって、産生されたCD8+T細胞が凍結保存された後でも高レベルの細胞生存率と癌抗原特異的活性の維持を可能にする方法を提供しようと努力する。
1. (a)癌抗原特異的CD8+T細胞を含むPBMCの中からCD8+T細胞を活性化し、次いで、該CD8+T細胞の共刺激因子を発現させる工程;
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む、癌抗原特異的CD8+T細胞を調製する方法。
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む、癌処置組成物を調製する方法。
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む工程によって調製された癌抗原特異的CD8+T細胞を含む、癌処置組成物。
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む工程によって調製された癌抗原特異的CD8+T細胞を含む、薬学的に有効な量の癌処置組成物
を投与する工程を含む、癌処置方法。
本発明のCD8+T細胞産生方法を用いると、CD8+T細胞の性能を劣化することなくCD8+T細胞を凍結保存することが可能になる。
本発明は、T細胞を凍結保存する方法と、このような方法によって産生されたT細胞とに関する。
1-1.EBV特異的CD8+T細胞の増殖
PBMCを以下の通りにEBV陽性健常個体の血液から単離した。10mLの血液を、5mL フィコール(GE Healthcare, Ficoll paque plus, 17144002)を充填した15mLチューブの中にゆっくりと流し込み、フィコール溶液の上にかぶせた。チューブを室温および800×gで20分間(ブレーキ速度:0)遠心分離した。フィコールと血漿の間にある白色の層だけを回収し、洗浄し、PBMCとして使用した。自己血漿(autoplasma)(自家血漿)を、PBMCの上にある薄い黄色の層から単離し、フィルターで濾過した後に使用した。
培養して9日目に、培養中のPBMCを回収し、RPMI培地(WELGENE, LM011-01)で洗浄した。洗浄したPBMCを、抗4-1BB抗体(Biolegend, 309818)および抗CD8抗体(Biolegend, 560347)で、4℃で30分間染色し、次いで、RPMI培地で再洗浄した。染色後に洗浄したPBMCを、4-1BBおよびCD8を発現する細胞からフローサイトメーター(BD Biosciences, FACSMelody)を用いて選択的に単離した。選択的に単離した細胞をRPMI培地で洗浄し、自動セルカウンター(Logos Biosystems, LUNA-FL)を用いて計数した。単離した細胞を、ALyS505N培地(CELL SCIENCE & TECHNOLOGY INSTITUTE INC., 1020P10)を用いて懸濁した後に、以下の工程を行った。
細胞死を誘導するために正常ドナー血液に放射線照射し、PBMCを単離し、1×107細胞/mLで懸濁し、凍結させた。T細胞の増殖を誘導するのに必要な同時刺激を与えるために、放射線照射済みPBMC(同種異系PBMC)を培養添加物として使用した。次いで、単離した同種血漿(alloplasma)を、PBMCの上層に接している薄い黄色の層から分離し、フィルターを用いて濾過し、次いで、使用した。
2-1.EBV特異的CD8+T細胞の増殖
実施例1の1-1プロセスを全く同じに実施した。
培養して14日目に、培養物中のPBMCを回収し、RPMI培地で洗浄した。洗浄したPBMCを、自動セルカウンターを用いて計数し、細胞をCTL培地に懸濁して、それぞれ2×106細胞/mLでインキュベートした。3%自己血漿と100IU/mL IL-2をCTL培地に添加し、これに細胞を懸濁し、次いで、懸濁した細胞を24ウェルプレートの各ウェルに1mLにつき2×106個の細胞で入れた。培養の初日に添加するEBVペプチドを2μg/mLの濃度に達するように添加し、CO2インキュベーターに入れてインキュベートした。
細胞死を誘導するために正常ドナー血液に放射線照射し、PBMCを単離し、1×107細胞/mLで懸濁し、次いで、凍結させ、保管した。T細胞の増殖を誘導するのに必要な同時刺激を与えるために、放射線照射済みPBMC(同種異系PBMC)を培養添加物として使用した。次いで、単離した同種血漿を、PBMCの上層に接している薄い黄色の層から分離し、フィルターを用いて濾過し、次いで、使用した。
全プロセスの15日目に大量培養細胞の半分を収集し、RPMI培地で洗浄し、自動セルカウンターを用いて計数した。上清を除去するために、細胞を室温、1,800rpmで5分間遠心分離し、5×105細胞/mLで分割し、次いで、CS-5凍結用培地(Biolife solution, 205102)に懸濁した。5×105細胞/mLで細胞凍結用チューブに入れられていた細胞を細胞凍結用容器(Biocision, BCS-170)に入れ、-80℃ディープフリーザー(ThermoFisher, IU28886D)に入れて1日保管した。再度、凍結細胞を1日取り出し、有効期限まで-196℃液体窒素タンク(Chart, 10650197)に入れて保管した。
インキュベーションが終了したら、全ての培養細胞を回収し、RPMI培地で洗浄し、自動セルカウンターを用いて計数した。2×107個の細胞を取っておき、T細胞治療剤の品質を試験するための表現型分析および有効性試験に使用した。残った細胞を5mLのCS-5凍結用培地に懸濁し、自動セルカウンターを用いて計数し、凍結のために3×107細胞/mLと5×106細胞/mL細胞で50mLチューブに入れて分割した。3×107細胞/mLと5×106細胞/mLで細胞凍結用チューブに入っている細胞を細胞凍結用容器に入れ、-80℃極低温冷凍庫に1日入れた。1日凍結された細胞を再度取り出し、有効期限まで-196℃液体窒素タンクに入れて保管した。
インキュベーションが終了したら、全ての培養細胞を回収し、RPMI培地で洗浄し、自動セルカウンターを用いて計数した。2×107個の細胞を取っておき、T細胞治療剤の品質を試験するための表現型分析および有効性試験に使用した。残った細胞を5mLのCS-5凍結用培地に懸濁し、自動セルカウンターを用いて計数し、凍結のために3×107細胞/mLと5×106細胞/mL細胞で50mLチューブに入れて分割した。3×107細胞/mLと5×106細胞/mLで細胞凍結用チューブに入っている細胞を細胞凍結用容器に入れ、-80℃極低温冷凍庫に1日入れた。1日凍結された細胞を再度取り出し、有効期限まで-196℃液体窒素タンクに入れて保管した。
6-1.20日プロセスによって調製されたT細胞治療剤の凍結後の解凍
196℃液体窒素タンクに保管した細胞を取り出し、細胞を37℃恒温ウォーターバス(WB-2, Daehan Science Ltd., DH.WB000122)に2分30秒〜3分間浸漬することで解凍した。解凍した細胞を15mLチューブに移し、自動セルカウンターを用いて計数し、解凍した細胞の細胞数および生存率をチェックした。10mLの温かいRPMI培地を、解凍した細胞の上にゆっくりとかぶせた。上清を除去するために、チューブを室温、1,800rpmで5分間遠心分離し、細胞を1mLのALys505N培地に懸濁した。1mLに懸濁した細胞の数および生存率を、自動セルカウンターを用いて再計数し、必要とされる細胞数を使用した。
実施例2の手順を実施し、2週間後および4週間後に、実施例5の手順によって凍結させた細胞を実施例6の手順に供して、回収率および生存率を測定した。さらに、検証、純度、および効力試験を行った。
細胞死を誘導するために正常ドナー血液に放射線照射し、PBMCを単離し、1×107細胞/mLで懸濁し、次いで、凍結させ、保管した。T細胞の増殖を誘導するのに必要な同時刺激を与えるために、放射線照射済みPBMC(同種異系PBMC)を培養添加物として使用した。
Claims (15)
- (a)癌抗原特異的CD8+T細胞を含むPBMCの中からCD8+T細胞を活性化し、次いで、該CD8+T細胞の共刺激因子を発現させる工程;
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む、癌抗原特異的CD8+T細胞を調製する方法。 - (e)工程(d)において凍結されたCD8+T細胞を解凍する工程をさらに含む、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- 癌抗原が、hTERT、NY-ESO1、MAGE-A3、WT1、およびEBVからなる群より選択される少なくとも1つである、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- 工程(b)が閉鎖系フローサイトメーターを用いて行われる、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- 工程(d)において、共刺激因子を発現するCD8+T細胞の数が、1mLあたりの予め決められた細胞数より多い場合またはそれと等しい場合に、凍結が行われる、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- 工程(d)において、CD8+T細胞の数が、少なくとも1mLあたりの予め決められた細胞数であり、かつ共刺激因子を発現するCD8+T細胞の割合が、少なくとも予め決められた比率である場合に、凍結が行われる、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- 工程(d)が、CD8+T細胞の数と、共刺激因子を発現するCD8+T細胞の割合とを検出する工程を含む、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- (f)工程(e)において得られたCD8+T細胞の数を増加させる工程をさらに含む、請求項2記載の癌抗原特異的CD8+T細胞を調製する方法。
- 共刺激因子が、CD28、CTLA-4、ICOS、PD1、BTLA、HVEM、CD27、OX40、4-1BB、CD30、およびSLAMからなる群より選択される1つまたは複数である、請求項1記載の癌抗原特異的CD8+T細胞を調製する方法。
- (a)癌抗原特異的CD8+T細胞を含むPBMCの中からCD8+T細胞を活性化し、次いで、該CD8+T細胞の共刺激因子を発現させる工程;
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む、癌処置組成物を調製する方法。 - (e)工程(d)において凍結されたCD8+T細胞を解凍する工程をさらに含む、請求項10記載の癌処置組成物を調製する方法。
- (a)癌抗原特異的CD8+T細胞を含むPBMCの中からCD8+T細胞を活性化し、次いで、該CD8+T細胞の共刺激因子を発現させる工程;
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む工程によって調製された癌抗原特異的CD8+T細胞を含む、癌処置組成物。 - (e)工程(d)において凍結されたCD8+T細胞を解凍する工程をさらに含む、請求項12記載の癌処置組成物。
- (a)癌抗原特異的CD8+T細胞を含むPBMCの中からCD8+T細胞を活性化し、次いで、該CD8+T細胞の共刺激因子を発現させる工程;
(b)工程(a)において活性化された細胞の中から、共刺激因子を発現するCD8+T細胞を選択する工程;
(c)工程(b)において選択されたCD8+T細胞の数を増加させる工程;および
(d)工程(c)において得られたCD8+T細胞を凍結させる工程
を含む工程によって調製された癌抗原特異的CD8+T細胞を含む、薬学的に有効な量の癌処置組成物
を投与する工程を含む、癌処置方法。 - (e)工程(d)において凍結されたCD8+T細胞を解凍する工程をさらに含む、請求項14記載の癌処置方法。
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