在CAF丰富的实体瘤模型中,MMP3过度表达增强了CAR-T细胞透和抗瘤活性
Yuge Zhu1, Jiaxin Tu2, Shance Li2
1Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Thoracic Surgery II, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China.
Journal for immunotherapy of cancer
|January 29, 2026
概括
工程化学抗原受体 (CAR) T细胞共同表达矩阵金属蛋白酶-3 (MMP3) 通过降解细胞外矩阵 (ECM) 有效地透到固体瘤中. 这种MMP3增强可以提高CAR T细胞治疗对具有挑战性的瘤微环境的疗效.
科学领域:
- 免疫治疗是一种免疫疗法.
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 化学抗原受体 (CAR) T细胞疗法在血液癌症中表现有前途,但与固体瘤作斗争.
- 固体瘤中的密集的细胞外基质 (ECM) 起到物理屏障的作用,阻碍T细胞的透和疗效.
- 克服ECM障碍对于在固体瘤治疗中推进CAR T细胞疗法至关重要.
研究的目的:
- 设计能够克服瘤细胞外基质 (ECM) 构成的物理障碍的CAR T细胞.
- 调查共表达矩阵金属蛋白酶-3 (MMP3) 对CAR T细胞功能和固体瘤中的抗瘤活性的影响.
- 在各种临床前模型中评估MMP3工程CAR T细胞的治疗潜力,包括具有具有挑战性的瘤微环境的模型.
主要方法:
- 向美索林或B7H3的CAR T细胞被设计成共同表达矩阵金属蛋白酶-3 (MMP3).
- 在体外测试 (基于Matrigel) 和体内模型 (异种移植和合成) 富含癌症相关纤维细胞 (CAFs) 用于评估MMP3工程的CAR T细胞.
- 评估了CAR T细胞的增殖,激活,细胞毒性,瘤透,扩张和抗瘤活性.
主要成果:
- 过度表达MMP3并没有影响CAR T细胞的增殖,激活或细胞毒性.
- 经MMP3工程的CAR T细胞在体外表现出增强的ECM入侵和改善的瘤细胞杀死.
- 在富含CAF的模型中,MMP3工程的CAR T细胞表现出优异的透,扩张和抗瘤作用,挽救了B7H3CAR T细胞的功能.
- 在免疫能力强的小鼠模型中,MMP3过度表达赋予了强大的抗瘤活性.
结论:
- 共同表达MMP3是一种简单而有效的策略,可以通过ECM屏障增强CAR T细胞的透.
- MMP3工程显著提高了CAR T细胞治疗在固体瘤中的疗效,即使在具有挑战性的微环境中也是如此.
- 这种方法有望促进对固体瘤指示的CAR T细胞治疗.
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