表达HLA-G,PD-L1和PD-L2的低免疫性人类iPSCs可以逃避先天性和适应性免疫力
Norihiro Tsuneyoshi1, Tomonori Hosoya1, Yuriko Takeno1
1HEALIOS K.K. Kobe Research Institute, Kobe KIMEC Center Bldg. 3F, 1-5-2 Minatojima-Minamimachi, Chuo-Ku, Kobe, Hyogo, 650-0047, Japan.
Stem cell research & therapy
|July 3, 2024
概括
工程化低免疫性干细胞 (HyPSCs) 逃避免疫排斥的再生医学. 这些细胞表达免疫检查点和安全开关,提供了一个有希望的无免疫抑制剂的全基细胞疗法.
科学领域:
- 干细胞生物学 干细胞生物学
- 免疫学 免疫学 免疫学
- 基因工程是基因工程.
背景情况:
- 人类诱导的多能干细胞 (hiPSCs) 为再生医学提供了潜力,但在异种移植中面临免疫性挑战.
- 低免疫细胞策略旨在实现无免疫抑制剂的全基细胞疗法.
- 基因工程的进步使得能够创建低免疫细胞来克服免疫排斥.
研究的目的:
- 为了产生一个低免疫性hiPSC (HyPSC) 克隆,减少人类白细胞抗原 (HLA) 类Ia和II表达.
- 设计HyPSC来表达免疫检查点分子 (PD-L1,PD-L2) 和安全开关 (RapaCasp9).
- 分析工程HyPSC及其衍生物的特性和免疫性.
主要方法:
- 产生HLA类Ia和II双淘汰 (DKO) 的hiPSCs.
- 在HLA类Ia/II DKO hiPSC中引入外源性β-2-微球蛋白 (B2M),HLA-G,PD-L1,PD-L2和RapaCasp9基因.
- 对HyPSC特征,多能性,差异化能力,免疫性和安全开关功能的全面分析.
主要成果:
- 通过同时引入B2M和HLA-G基因到HLA类Ia/II DKOhiPSC中来实现HLA-G的增强细胞表面表达.
- HyPSCs保持了正常的型和多能干细胞特征,分化成所有三个生殖层血统.
- 来自HyPSC的造血原生细胞 (HPC) 证明了对先天性和适应性免疫的逃避,RapaCasp9安全开关在体外和体内证明有效.
结论:
- 工程HLA类Ia/II DKOhiPSCs表达HLA-G,PD-L1,PD-L2和RapaCasp9代表了一种可行的来源,用于异种移植.
- 这种方法为基于干细胞的疗法中的免疫排斥提供了潜在的解决方案.
- 开发的HyPSC有望促进再生医学应用的发展.
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