通过使用B2M淘汰和CD47/HLA-E过度表达,从PBMC中确定免疫浸透性iPSCs
Cha Yeon Kim1, Cholong Jeong1, Yeon-Ju Jeong2,3
1Department of Convergence Medicine, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
Tissue engineering and regenerative medicine
|July 19, 2025
概括
工程化低免疫诱导多能干细胞 (iPSCs) 在分化后逃避免疫排斥. 这一进步支持无免疫抑制的全基细胞疗法,为再生医学铺平了道路.
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
- 再生医学是一种再生医学.
背景情况:
- 诱导多能干细胞 (iPSCs) 提供了再生疗法的潜力.
- 对iPSCs的异构移植面临着免疫排斥的挑战.
- 在分化后,低免疫iPSCs的有效性尚未得到充分理解.
研究的目的:
- 为了设计低免疫诱导多能干细胞 (iPSCs).
- 为了评估差异化的iPSC中的免疫逃避.
- 为了评估在体内功能性低免疫iPSC衍生的细胞.
主要方法:
- 从外围血液单核细胞生成的iPSCs.
- 使用CRISPR-Cpf1用于B2M淘汰和HLA-E/CD47过度表达的隐形病毒载体.
- 在人性化小鼠中诱导了内皮分化并评估了体内功能.
主要成果:
- 改造后的iPSC保持了多能性,并表达了高水平的HLA-E/CD47.
- 在编辑的iPSC中观察到减少的NK细胞介导溶解.
- 差异化的iPSC产生了>98%的内皮细胞,增强了体内生存率.
结论:
- 多重基因编辑在iPSC和分化的细胞中实现了持久的免疫逃避.
- 低免疫iPSC衍生的疗法显示出无需免疫抑制的全基移植的潜力.
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