优选瘤向HER2由iPSC衍生的CAR T细胞设计,以克服对固体瘤有效性的多个障碍
Martin P Hosking1, Soheila Shirinbak1, Kyla Omilusik1
1Fate Therapeutics, Inc., San Diego, CA, USA.
Cell stem cell
|June 5, 2025
概括
从诱导多能干细胞 (iPSCs) 衍生出来的工程化模拟抗原受体 (CAR) T细胞显示出对固体瘤的希望. 这些针对HER2的CAR T细胞克服了抵抗机制,并表现出强大的抗瘤活性,减少了瘤外毒性.
科学领域:
- 免疫治疗是一种免疫疗法.
- 癌症研究 癌症研究
- 干细胞疗法 干细胞疗法
背景情况:
- 化学抗原受体 (CAR) T细胞疗法在固体瘤中面临挑战,包括点上,瘤外毒性,抗原异质性和瘤微环境耐药性.
- 现有的疗法难以同时克服多个抗药机制,从而限制了它们的有效性.
研究的目的:
- 开发一种诱导多能干细胞 (iPSC) 衍生的CAR T细胞疗法,针对固体瘤的人类表皮生长因子受体2 (HER2).
- 设计CAR T细胞以克服常见的抗药机制并增强抗瘤活性,同时最大限度地降低非瘤效应.
主要方法:
- 开发出针对HER2的iPSC衍生的CAR T细胞,能够识别各种HER2形式 (截断,错折).
- 采用多重基因组编辑来增强CAR T细胞功能和对瘤微环境的抵抗力.
- 结合CAR T细胞与治疗抗体和工程Fc受体 (CD16a) 进行多抗原向.
- 嵌入基因修改 (IL-7R融合,TGF-β-IL-18R,CXCR2) 改善T细胞持久性,TGF-β耐药性和瘤特异性迁移.
主要成果:
- 来自iPSC的HER2向的CAR T细胞在体外和体内表现出强大的HER2特异性抗瘤活性.
- 观察到对HER2阳性正常组织的有限的细胞分解向,这表明安全性有所改善.
- 使用抗体和工程Fc受体的组合疗法促进了全面的多抗原向.
- 工程T细胞显示持续的持久性,对TGF-β抑制的抗性,以及增强的瘤特异性迁移.
结论:
- 为 HER2 向设计的 iPSC 衍生 CAR T 细胞代表了固体瘤免疫疗法的有前途战略.
- 多重编辑和组合方法有效地解决了关键的耐药性机制和毒性问题.
- 这种先进的CAR T细胞平台在治疗固体瘤方面提供了提高疗效和安全性的潜力.
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