JP2020527044A - CD8+CD45RCLOW/−Treg集団の拡大増殖および免疫抑制能力を高めるための方法 - Google Patents
CD8+CD45RCLOW/−Treg集団の拡大増殖および免疫抑制能力を高めるための方法 Download PDFInfo
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Abstract
【選択図】なし
Description
材料および方法
新鮮もしくは解凍したPBMCからのCD8+CD45RClow/−Tregを、10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)が添加されたRPMI 1640培地に3×105/mlで播種し、コーティングした抗CD3 mAb(1μg/ml)、可溶性抗CD28 mAb(1μg/ml)および/または1:4のTreg:APC比の同種異系のAPCで刺激した。7日目に、拡大増殖した細胞を1.5×105/mlで希釈し、コーティングした抗CD3および可溶性抗CD28 MAb(それぞれ1μg/ml)で再度刺激した。IL−2およびIL−15サイトカインを0、7、10および12日目に新たに添加した。シクロスポリンA(45ng/ml)、ラパマイシン(45ng/ml)、メチルプレドニソロン(500pg/ml)、タクロリムス(2ng/ml)またはミコフェノール酸モフェチル(1μg/ml)などの免疫抑制剤を拡大増殖の0および7日目または14日間の薬物を使用しない拡大増殖後に培養培地に添加して、CD8+CD45RClow/−Tregに対するそれらの毒性および抑制への効果を評価した。14日目に、拡大増殖したTregを使用前にPBSで洗浄した。7日目に10倍超まで拡大増殖したCD8+CD45RClow/−Tregに対して抑制活性を試験した。長期間の拡大増殖のために、14および21日目にCD8+CD45RClow/−TregおよびCD4+CD25highCD127low/−Tregをコーティングした抗CD3(1μg/ml)および可溶性抗CD28 MAb(1μg/ml)で再度刺激し、IL−2およびIL−15サイトカインを7〜28日目の間に2日ごとに新たに添加した。必要な場合には培養培地1×サイトカイン(IL−2(1000U/ml)およびIL−15(10ng/ml))を添加した。
本発明者らは、14日間の拡大増殖後7日目のCD8+CD45RClow/−Tregの生存(図1)または14日間の拡大増殖時のCD8+CD45RClow/−Tregの拡大増殖収率および抑制機能スコア(図3D)に対する免疫抑制剤(病院で使用される濃度)の効果を試験した。インビトロでの拡大増殖に対する免疫抑制剤の効果を試験するために、それらを14日間の間またはその後に単独で添加したか(すなわち、0〜7日目のシクロスポリンA(CsA)、次いで7〜14日目のメチルプレドニソロン(MPr)は図3Dの左上の角においてCsA−MPrとラベルが付されている)、あるいはどんな免疫抑制剤も使用せずに(NT)添加した。本発明者らは、ラパマイシン(Rapa)のみの存在下での14日間の拡大増殖は、拡大増殖倍数および抑制能力の両方を高めるために最も効率的であること、および最初にラパマイシンおよびその後にメチルプレドニソロンも効率的な組み合わせであるが、ミコフェノール酸モフェチル(MPA)の存在はラパマイシンによる拡大増殖を阻害し、かつ抑制を減少させ(図3D)、従って、ラパマイシンがインビトロだけでなくインビボでもCD8+CD45RClow/−Tregの拡大増殖および機能を高めるのに有利であり得ることを観察した。
方法:新鮮な血液を一人の健康な志願者から採取し、PBMCをFicoll遠心分離によって単離し、PBSで洗浄し、PBS−FCS−EDTA中2×108のPBMC/mlで調整し、抗CD3−PeCy7、抗CD4−PerCPCy5.5および抗CD45RC FITCと共に4℃で30分間インキュベートした。細胞をPBS−FCS−EDTAで洗浄し、60μmのティッシュで濾過し、Dapiで標識し、かつFACS Ariaによりリンパ球の形態、凝集細胞の除外およびDAPI−CD3+CD4−CD45RClow/−の発現に基づいて選別した。選別後に細胞を培地で洗浄し、10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)、抗CD28 MAb(クローンCD28.2、可溶性、1μg/ml)が添加され、かつ50nMのラパマイシンが添加されたか添加されていないRPMI 1640培地を含む、先に抗CD3(OKT3クローン、PBS中1μg/ml、1ml/ウェル、37℃で1時間、次いでPBSで3回洗浄)でコーティングしたp6プレートに106のTreg/ウェル/3mlで播種した。7および14日目に、Tregを回収、計数および洗浄し、かつ10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)、抗CD28 MAb(クローンCD28.2、可溶性、1μg/ml)が添加され、かつ50nMのラパマイシンが添加されたか添加されていないRPMI 1640培地を含む、先に抗CD3(OKT3クローン、PBS中1μg/ml、1ml/ウェル、37℃で1時間、次いでPBSで3回洗浄)でコーティングしたp6プレートに5×105のTreg/ウェル/3mlで播種した。7〜20日目から、サイトカインを2日ごとに新たに添加し、新鮮な培地(10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)が添加されたRPMI 1640培地)を増殖率に応じて必要な場合に添加した。抑制活性の評価のために拡大増殖したTregを14日目に回収した。同じHVドナーからのPBMCを解凍し、PBSで洗浄し、PBS−FCS−EDTA中2×108のPBMC/mlで調整し、抗CD3−PeCy7、抗CD4−PerCPCy5.5および抗CD25−APC−Cy7と共に4℃で30分間インキュベートした。細胞をPBS−FCS−EDTAで洗浄し、60μmのティッシュで濾過し、Dapiで標識し、かつFACS Ariaによりリンパ球の形態、凝集細胞の除外およびDAPI−CD3+CD4+CD25−の発現に基づいて選別し、かつCFSEで標識した。CD3+細胞枯渇および35Gyの照射によってAPCを得た。拡大増殖したTregを、10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)および非必須アミノ酸(1×)が添加されたRPMI 1640培地に1:1:1のTreg:Teff:APC比で播種した。5日間の培養後に、Teff増殖をDAPI−CD4+CD3+T細胞におけるCFSE解析によって解析した。
方法:新鮮な血液を一人の健康な志願者から採取し、PBMCをFicoll遠心分離によって単離し、PBSで洗浄し、PBS−FCS−EDTA中2×108のPBMC/mlで調整し、抗CD3−PeCy7、抗CD4−PerCPCy5.5および抗CD45RC FITCと共に4℃で30分間インキュベートした。細胞をPBS−FCS−EDTAで洗浄し、60μmのティッシュで濾過し、Dapiで標識し、かつFACS Ariaによりリンパ球の形態、凝集細胞の除外およびDAPI−CD3+CD4−CD45RClow/−の発現に基づいて選別した。選別後に細胞を培地で洗浄し、10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)、抗CD28 MAb(クローンCD28.2、可溶性、1μg/ml)が添加され、かつ免疫抑制剤(シクロスポリンA(45ng/ml)、ラパマイシン(45ng/ml)、メチルプレドニソロン(500pg/ml)、タクロリムス(2ng/ml)またはミコフェノール酸モフェチル(1μg/ml))が添加されたか添加されていないRPMI 1640培地を含む、先に抗CD3(OKT3クローン、PBS中1μg/ml、1ml/ウェル、37℃で1時間、次いでPBSで3回洗浄)でコーティングしたp6プレートに106のTreg/ウェル/3mlで播種した。7日目に、Tregを回収、計数および洗浄し、かつ10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)、抗CD28 MAb(クローンCD28.2、可溶性、1μg/ml)が添加され、かつ免疫抑制剤(シクロスポリンA(45ng/ml)、ラパマイシン(45ng/ml)、メチルプレドニソロン(500pg/ml)、タクロリムス(2ng/ml)またはミコフェノール酸モフェチル(1μg/ml))(0〜7日目と同じまたは異なる薬物)が添加されたか添加されていないRPMI 1640培地を含む、先に抗CD3(OKT3クローン、PBS中1μg/ml、1ml/ウェル、37℃で1時間、次いでPBSで3回洗浄)でコーティングしたp6プレートに5×105のTreg/ウェル/3mlで播種した。10および12日目に、サイトカインを新たに添加した。抑制活性の評価のために拡大増殖したTregを14日目に回収した。同じHVドナーからのPBMCを解凍し、PBSで洗浄し、PBS−FCS−EDTA中2×108のPBMC/mlで調整し、抗CD3−PeCy7、抗CD4−PerCPCy5.5および抗CD25−APC−Cy7と共に4℃で30分間インキュベートした。細胞をPBS−FCS−EDTAで洗浄し、60μmのティッシュで濾過し、Dapiで標識し、かつFACS Ariaによりリンパ球の形態、凝集細胞の除外およびDAPI−CD3+CD4+CD25−の発現に基づいて選別し、かつCFSEで標識した。CD3+細胞枯渇および35Gyの照射によってAPCを得た。拡大増殖したTregを10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)および非必須アミノ酸(1×)が添加されたRPMI 1640培地に1:1:1のTreg:Teff:APC比で播種した。5日間の培養後に、Teff増殖をDAPI−CD4+CD3+T細胞においてCFSE解析によって解析した。
方法:新鮮な血液を一人の健康な志願者から採取し、PBMCをFicoll遠心分離によって単離し、PBSで洗浄し、PBS−FCS−EDTA中2×108のPBMC/mlで調整し、抗CD3−PeCy7、抗CD4−PerCPCy5.5および抗CD45RC FITCと共に4℃で30分間インキュベートした。細胞をPBS−FCS−EDTAで洗浄し、60μmのティッシュで濾過し、Dapiで標識し、かつFACS Ariaによりリンパ球の形態、凝集細胞の除外およびDAPI−CD3+CD4−CD45RClow/−の発現に基づいて選別した。選別後に細胞を培地で洗浄し、10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)、抗CD28 MAb(クローンCD28.2、可溶性、1μg/ml)が添加されたRPMI 1640培地を含む、先に抗CD3(OKT3クローン、PBS中1μg/ml、1ml/ウェル、37℃で1時間、次いでPBSで3回洗浄)でコーティングしたp6プレートに106のTreg/ウェル/3mlで播種した。7日目に、Tregを回収、計数および洗浄し、かつ10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)、IL−2(1000U/ml)およびIL−15(10ng/ml)、抗CD28 MAb(クローンCD28.2、可溶性、1μg/ml)が添加されたRPMI 1640培地を含む、先に抗CD3(OKT3クローン、PBS中1μg/ml、1ml/ウェル、37℃で1時間、次いでPBSで3回洗浄)でコーティングしたp6プレートに5×105のTreg/ウェル/3mlで播種した。10および12日目に、サイトカインを新たに添加した。14日目に、拡大増殖したTregを回収し、10%AB血清、ペニシリン(100U/ml)、ストレプトマイシン(0.1mg/ml)、ピルビン酸ナトリウム(1mM)、グルタミン(2mM)、Hepes緩衝液(1mM)、非必須アミノ酸(1×)が添加され、免疫抑制剤(シクロスポリンA(45ng/ml)、ラパマイシン(45ng/ml)、メチルプレドニソロン(500pg/ml)、タクロリムス(2ng/ml)またはミコフェノール酸モフェチル(1μg/ml))が添加されたか添加されておらず、かつサイトカインが添加されたか添加されていない(IL−2(1000U/ml)およびIL−15(10ng/ml)が14、16、18および20日目に添加された)、RPMI 1640培地を含むp96プレートに同種異系のAPC(Treg:APC1:4)と共に5×105Treg/ウェル/200μlで播種した。Tregを21日目に生存/拡大増殖収率および表現型について解析した。
本出願全体を通して、各種参考文献は本発明が属する最先端技術について記載している。これらの参考文献の開示は参照によって本開示に組み込まれる。
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Claims (15)
- ラパマイシン化合物の存在下でCD8+CD45RClow/−Treg集団を培養することを含む、CD8+CD45RClow/−Treg集団の拡大増殖および免疫抑制能力を高める方法。
- 前記CD8+CD45RClow/−Treg細胞集団は、目的の抗原に特異的なキメラ抗原受容体(CAR)または自己抗原を含むキメラ自己抗体受容体(CAAR)などのT細胞受容体またはそのサブユニットもしくは機能的等価物をコードするように遺伝子改変されている、請求項1に記載の方法。
- 前記CD8+CD45RClow/−Treg細胞集団は遺伝子改変されており、かつ機能的T細胞受容体(TCR)および/またはヒト白血球抗原(HLA)、例えば、HLAクラスIおよび/またはHLAクラスIIの発現を欠いている、請求項1に記載の方法。
- 前記CD8+CD45RClow/−Treg細胞集団は治療される前記レシピエント患者の同種異系のTregである、請求項1に記載の方法。
- 前記CD8+CD45RClow/−Treg細胞集団を抗原提示細胞の存在下で培養する、請求項1に記載の方法。
- 前記ラパマイシン化合物を前記拡大増殖の0および7日目または14日後に培養培地に添加する、請求項1に記載の方法。
- 前記ラパマイシン化合物を前記拡大増殖の0および7日目に培養培地に添加し、メチルプレドニソロンなどの別の免疫抑制剤を培養培地に添加する、請求項1に記載の方法。
- 前記培養培地は約45ng/mlの量のラパマイシンを含む、請求項1に記載の方法。
- サイトカイン、好ましくはIL−2および/またはIL−15を、例えば1、2、3、4、5、6、7、8、9、10、11、12、13、14、15、16、17、18、19および/または20日目に1回、2回、3回またはそれ以上の回数で前記培養培地にさらに添加する、請求項1に記載の方法。
- 抗CD3抗体および/または抗CD8抗体を培養の0、1、2、3、4、5、6、7、8、9、10、11、12、13、14、15、16、17、18、19および/または20日目、好ましくは0日目および/または11、12、13、14および/または15日目に前記培養培地に添加する、請求項1に記載の方法。
- 前記培養を、例えば12日間から最大6〜8週間の間などの少なくとも12日間、好ましくは14日間行う、請求項1に記載の方法。
- それを必要とする患者における移植片拒絶反応またはGVHDを予防または減少させる方法であって、ラパマイシン化合物と組み合わせた治療的有効量のCD8+CD45RClow/−Treg集団を前記患者に投与することを含む方法。
- それを必要とする患者における遺伝性疾患を治療する方法であって、前記患者にラパマイシン化合物と組み合わせた治療的有効量のCD8+CD45RClow/−Treg集団を投与することを含み、前記遺伝性疾患は、IPEX(免疫調節異常・多腺性内分泌障害・腸疾患・X連鎖症候群)およびAPECED(自己免疫性多腺性内分泌不全症・カンジダ症・外胚葉ジストロフィー)、B細胞原発性免疫不全症、マックル・ウェルズ症候群、混合型自己炎症性/自己免疫症候群、NLRP12関連遺伝性周期性発熱症候群、腫瘍壊死因子受容体1関連周期性症候群)などの自己免疫に関連する免疫系を冒す一遺伝子性遺伝性疾患、ならびにデュシェンヌ型筋ジストロフィー(DMD)、嚢胞性線維症、リソソーム病およびα1−アンチトリプシン欠乏症などの一遺伝子性遺伝性疾患からなる群から選択される方法。
- シクロスポリンとメチルプレドニソロンとの組み合わせの存在下で前記CD8+CD45RClow/−Treg集団を培養することを含む、CD8+CD45RClow/−Treg集団の免疫抑制能力を高める方法。
- シクロスポリンとメチルプレドニソロンとの組み合わせと組み合わせたCD8+CD45RClow/−Treg集団の治療的に有効な組み合わせを投与することを含む、移植片拒絶反応またはGVHDを予防または減少させる方法。
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WO2024028486A1 (en) * | 2022-08-04 | 2024-02-08 | Nantes Universite | In vitro method for obtaining clinical-grade cd8+ cd45rclow/- regulatory t cells |
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