JP6551963B2 - 巨核球前駆細胞の製造方法 - Google Patents
巨核球前駆細胞の製造方法 Download PDFInfo
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- JP6551963B2 JP6551963B2 JP2014100422A JP2014100422A JP6551963B2 JP 6551963 B2 JP6551963 B2 JP 6551963B2 JP 2014100422 A JP2014100422 A JP 2014100422A JP 2014100422 A JP2014100422 A JP 2014100422A JP 6551963 B2 JP6551963 B2 JP 6551963B2
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Description
[1]ヒストン脱アセチル化酵素(HDAC)阻害剤と造血前駆細胞とを接触させる工程を含む、巨核球前駆細胞を製造する方法。
[2]前記造血前駆細胞が、多能性幹細胞から分化誘導された細胞である、[1]に記載の方法。
[3]前記HDAC阻害剤が、トリコスタチンA、ボリノスタット(Vorinostat)、MC1568およびパノビノスタット(Panobinostat)から成る群より選択される化合物である、[1]または[2]に記載の方法。
[4]前記接触工程が、幹細胞因子(stem cell factor (SCF))およびトロンボポエチン(TPO)の存在下で実施される、[1]から[3]のいずれかに記載の方法。
[5]前記巨核球前駆細胞が、ヒト巨核球前駆細胞である、[1]から[4]のいずれかに記載の方法。
[6]HDAC阻害剤を含む、造血前駆細胞から巨核球前駆細胞への分化誘導促進剤。
[7]前記HDAC阻害剤が、トリコスタチンA、ボリノスタット、MC1568およびパノビノスタットから成る群より選択される化合物である、[6]に記載の分化誘導促進剤。
[8]SCFおよびTPOをさらに含む、[6]または[7]に記載の分化誘導促進剤。
[9]前記巨核球前駆細胞が、ヒト巨核球前駆細胞である、[6]から[8]のいずれかに記載の分化誘導促進剤。
[10][6]から[9]のいずれかに記載の分化誘導促進剤を含む培養液。
[11]HDAC阻害剤の存在下で巨核球前駆細胞を維持培養する方法。
[12]前記巨核球前駆細胞が、外来性の癌遺伝子、p16遺伝子又はp19遺伝子の発現を抑制する遺伝子、並びに/あるいはアポトーシス抑制遺伝子を発現する細胞である、[11]に記載の方法。
[13]前記HDAC阻害剤が、トリコスタチンA、ボリノスタット、MC1568およびパノビノスタットから成る群より選択される化合物である、[11]または[12]に記載の方法。
[14]前記巨核球を培養する工程が、SCFおよびTPOを含む培地で培養する工程である、[11]から[13]のいずれかに記載の方法。
[15]HDAC阻害剤を含む、巨核球前駆細胞を維持培養するための培養液。
[16]前記巨核球前駆細胞が、外来性の癌遺伝子、p16遺伝子若しくはp19遺伝子の発現を抑制する遺伝子、及び/又はアポトーシス抑制遺伝子を発現する細胞である、[15]に記載の培養液。
[17]前記HDAC阻害剤が、トリコスタチンA、ボリノスタット、MC1568およびパノビノスタットから成る群より選択される化合物である、[15]または[16]に記載の培養液。
[18]SCFおよびTPOをさらに含む、[15]から[17]のいずれかに記載の培養液。
[19]前記巨核球前駆細胞が、ヒト巨核球前駆細胞である、[15]から[18]のいずれかに記載の培養液。
本発明は、HDAC阻害剤と造血前駆細胞とを接触させる工程を含む、巨核球前駆細胞を製造する方法を提供する。好ましい態様において、造血前駆細胞はHDAC阻害剤を含む培養液中でHDAC阻害剤と接触される。本発明では、HDAC阻害剤以外の物質と接触させることを妨げない。
本発明はまた、HDAC阻害剤を含む、造血前駆細胞から巨核球前駆細胞への分化誘導促進剤を提供する。本発明において、「分化誘導促進剤」とは、HDAC阻害剤と接触させない対照と比較して、造血前駆細胞から巨核球前駆細胞へ分化誘導を有意に、例えば1.2倍以上、好ましくは1.5倍以上、より好ましくは1.7倍以上促進する物質を意味する。分化誘導促進の程度は、巨核球前駆細胞数の増大をフローサイトメトリーにより確認することで評価することができる。好ましい態様において、本発明の分化誘導促進剤は造血前駆細胞を培養する培養液に含まれる。
本発明はまた、HDAC阻害剤を含む、造血前駆細胞から巨核球前駆細胞への分化誘導時において用いる巨核球前駆細胞機能改善剤を提供する。本発明において、「巨核球前駆細胞機能改善剤」とは、造血前駆細胞から巨核球前駆細胞への分化誘導時に当該細胞へ接触させることによって、HDAC阻害剤と接触させない対照と比較して、得られた巨核球前駆細胞からの血小板産生量を有意に、例えば1.2倍以上、好ましくは1.5倍以上、より好ましくは1.7倍以上増加させる物質を意味する。巨核球前駆細胞の機能改善の程度は産生される血小板の量を測定することによって評価することもできる。好ましい態様において、本発明の巨核球前駆細胞機能改善は造血前駆細胞を培養する培養液に含まれる。本発明において、特に断りがない場合は、巨核球前駆細胞機能改善剤は、分化誘導促進剤に包含される。
(1)Z-Asp-CH2-DCB(分子量454.26)
(2)Boc-Asp(OMe)-FMK(分子量263.3)
(3)Boc-Asp(OBzl)-CMK(分子量355.8)
(4)Ac-AAVALLPAVLLALLAP-YVAD-CHO(分子量1990.5)(配列番号1)
(5)Ac-AAVALLPAVLLALLAP-DEVD-CHO(分子量2000.4)(配列番号2)
(6)Ac-AAVALLPAVLLALLAP-LEVD-CHO(分子量1998.5)(配列番号3)
(7)Ac-AAVALLPAVLLALLAP-IETD-CHO(分子量2000.5)(配列番号4)
(8)Ac-AAVALLPAVLLALLAP-LEHD-CHO(分子量2036.5)(配列番号5)
(9)Z-DEVD-FMK (Z-Asp-Glu-Val-Asp-fluoromethylketone)(配列番号6)
(10)Z-VAD FMK
本発明はまた、HDAC阻害剤の存在下で巨核球前駆細胞を維持培養する方法を提供する。本明細書において「維持培養」とは、巨核球前駆細胞の巨核球への分化・成熟を抑制しながら巨核球前駆細胞を増殖させることをいう。維持培養においては、培養細胞の数が全体として増加を続ける限り、巨核球前駆細胞の一部が巨核球に分化してもよい。
本発明は、上述の方法で得られた巨核球前駆細胞からさらに巨核球細胞および/または血小板を製造する方法を提供する。「癌遺伝子」、「p16遺伝子又はp19遺伝子の発現を抑制する遺伝子」および/または「アポトーシス抑制遺伝子」を強制発現させている場合、当該強制発現を停止して培養することによって巨核球細胞および/または血小板が製造され得る。強制発現の停止は、例えば、薬剤応答性ベクターを用いて強制発現をしている場合、対応する薬剤と当該細胞と接触させないことによって達成してもよい。この他にも、上記のLoxPを含むベクターを用いた場合は、Creリコンビナーゼを当該細胞に導入することによって強制発現を停止してもよい。さらに、一過性発現ベクター、およびRNAまたはタンパク質導入を用いた場合は、当該ベクター等との接触を止めることによって強制発現を停止してもよい。強制発現の停止において用いられる培地は、上記と同一の培地を用いて行うことができる。
ヒトES細胞(khES3:京都大学より入手、H1:WiCell Research Instituteより入手可能)およびiPS細胞(TKDN SeV2およびTKDN SeV5:センダイウィルスを用いて樹立されたヒト胎児皮膚繊維芽細胞由来iPS細胞、TKPB SeV8およびTKPB SeV9:センダイウィルスを用いて樹立されたヒト末梢血単核球由来iPS細胞、EP1(585A1)、EP2(585B1)およびEP6(692D2):Okita K, et al, Stem Cells 31, 458-66, 2013に記載のエピソーマルベクターを用いて樹立されたヒト末梢血単核球由来iPS細胞)から、Takayama N., et al. Blood, 5298-5306 (2008)に記載の方法に従って、血球細胞への分化培養を実施した。即ち、ヒトES/iPS細胞コロニーを20ng/mL VEGF (R&D SYSTEMS)を含む基本培地(15% Fetal Bovine Serum (GIBCO)、1% Penicillin-Streptomycin-Glutamine (GIBCO)、1% Insulin, Transferrin, Selenium Solution (ITS -G) (GIBCO)、0.45mM 1-Thioglycerol (Sigma-Aldrich)、50μg/mL L-Ascorbic Acid (Sigma-Aldrich)を含有するIMDM (Iscove's Modified Dulbecco's Medium) (Sigma-Aldrich))中でC3H10T1/2細胞(RIKEN BioResource Center)と14日間共培養して造血前駆細胞(Hematopoietic Progenitor Cells(HPC))を作製した。培養は20% O2、5% CO2で実施した(特に記載がない限り、以下同条件)。
ドナーより同意を得て得られた全血に1/9量のデキストロース溶液を添加し、900rpm,で10分間遠心した後、回収した上清を多血小板血漿(platelet rich plasma (PRP))として用いた。
上記1)の共培養14日目に上記HPCを回収し、6well plate中のC3H10 T1/2細胞上に3x104/wellで播種し、50ng/mlのSCF (R&D SYSTEMS)、50ng/mlのTPO (R&D SYSTEMS)およびHDAC 阻害剤(10nM TSA(トリコスタチンA)(Sigma-Aldrich)、100nM SAHA(Vorinostat)(Sigma-Aldrich)、10μM MC1568(Sigma-Aldrich)、または1nM LBH-589 (Panobinostat) (Sigma-Aldrich))を含む基本培地で10日間培養した。陰性対照として、50ng/mlのSCF、50ng/mlのTPOおよびDMSOを含む基本培地で10日間 HPCを培養した。
実施例1に記載した方法でTKDN SeV5およびEP2から得られたHPCを、6well plate中のC3H10 T1/2細胞上に3x104/wellで播種し、次の5つの条件のいずれかで培養した;
(条件1)DMSOを添加した血小板誘導培地(50ng/ml SCFおよび50ng/ml TPOを添加した基本培地)で10日間培養(DMSO)、
(条件2)10nM TSAを添加した血小板誘導培地で10日間培養(Day 0-10)、
(条件3)10nM TSAを添加した血小板誘導培地で4日間培養した後、DMSOを添加した血小板誘導培地に交換しさらに6日間培養(Day 0-4)、
(条件4)DMSOを添加した血小板誘導培地で4日間培養後、10nM TSAを添加した血小板誘導培地に交換し4日間培養した後、DMSOを添加した血小板誘導培地に交換し2日間培養(Day 4-8)、または
(条件5)DMSOを添加した血小板誘導培地で8日間培養後、10nM TSAを添加した血小板誘導培地に交換し2日間培養(Day 8-10)。
(条件1)DMSOを添加した血小板誘導培地で10日間培養(DMSO)、
(条件2)10nM TSAを添加した血小板誘導培地で10日間培養(Day 0-10)、
(条件3)10nM TSAを添加した血小板誘導培地で4日間培養した後、DMSOを添加した血小板誘導培地に交換しさらに6日間培養(Day 0-4)、
(条件4)DMSOを添加した血小板誘導培地で4日間培養後、10nM TSAを添加した血小板誘導培地に交換し3日間培養した後、DMSOを添加した血小板誘導培地に交換し3日間培養(Day 4-8)、または
(条件5)DMSOを添加した血小板誘導培地で7日間培養後、10nM TSAを添加した血小板誘導培地に交換し3日間培養(Day 8-10)。
(条件1)DMSOを添加した血小板誘導培地(50ng/ml SCFおよび50ng/ml TPOを添加した基本培地)で10日間培養(DMSO)、
(条件2)10μM MC1568を添加した血小板誘導培地で10日間培養(Day 0-10)、
(条件3)10μM MC1568を添加した血小板誘導培地で4日間培養した後、DMSOを添加した血小板誘導培地に交換しさらに6日間培養(Day 0-4)、
(条件4)DMSOを添加した血小板誘導培地で4日間培養後、10μM MC1568を添加した血小板誘導培地に交換し4日間培養した後、DMSOを添加した血小板誘導培地に交換し2日間培養(Day 4-8)、または(条件5)DMSOを添加した血小板誘導培地で8日間培養後、10μM MC1568を添加した血小板誘導培地に交換し2日間培養(Day 8-10)。
Claims (11)
- 5μM〜20μMのMC1568または0.5nM〜2nMのパノビノスタット(Panobinostat)と、幹細胞因子(stem cell factor (SCF))およびトロンボポエチン(TPO)との存在下で造血前駆細胞を培養する工程を含む、巨核球細胞を製造する方法。
- 前記造血前駆細胞が、多能性幹細胞から分化誘導された細胞である、請求項1に記載の方法。
- 前記造血前駆細胞が、ヒト由来である、請求項1または2に記載の方法。
- 5μM〜20μMのMC1568または0.5nM〜2nMのパノビノスタットと、SCFおよびTPOとを含む、造血前駆細胞から巨核球細胞への分化誘導促進剤。
- 前記造血前駆細胞が、ヒト由来である、請求項4に記載の分化誘導促進剤。
- 請求項4または5に記載の分化誘導促進剤を含む培養液。
- 5μM〜20μMのMC1568または0.5nM〜2nMのパノビノスタットと、SCFおよびTPOとの存在下で巨核球細胞を維持培養する方法。
- 前記巨核球細胞の前駆細胞が、外来性の癌遺伝子、p16遺伝子又はp19遺伝子の発現を抑制する遺伝子、並びに/あるいはアポトーシス抑制遺伝子を発現する細胞である、請求項7に記載の方法。
- 前記巨核球細胞の前駆細胞が、ヒト由来である、請求項8に記載の培養液。
- 5μM〜20μMのMC1568または0.5nM〜2nMのパノビノスタットと、SCFおよびTPOとの存在下で造血前駆細胞を培養する工程を含む、血小板を製造する方法。
- 前記造血幹細胞が、多能性幹細胞から分化誘導された細胞である、請求項10に記載の方法。
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