通过针对性表观基因组编辑诱导的CAR T细胞中持续和特定的多重免疫检查点调制
Maria Silvia Roman Azcona1,2, Gianni Monaco1,2, Melissa Whitehead1,2,3
1Institute for Transfusion Medicine and Gene Therapy, Medical Center - University of Freiburg, 79106 Freiburg, Germany.
Molecular therapy. Nucleic acids
|July 21, 2025
概括
工程T细胞与癌症作斗争,但可以变得疲不堪. 这项研究使用表观基因组编辑来安全地沉默CAR T细胞中的耗尽基因,增强它们对持久癌症缓解的潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 基因编辑 基因编辑
背景情况:
- 化学抗原受体 (CAR) T 细胞在临床上取得了成功,但由于瘤介导的抑制受体刺激,导致T 细胞疲劳.
- 目前的策略,如检查点抑制和基因淘汰有局限性,包括副作用和永久的DNA改变.
- 针对性表观基因组编辑为调节基因表达而无需改变DNA序列提供了更安全,更短暂的替代方案.
研究的目的:
- 调查多重表观基因组编辑的有效性和安全性,以使T细胞中与疲劳相关的基因 (PDCD1和LAG3) 失活.
- 评估表观基因组编辑在原发性人类T细胞和前列腺癌特异性CAR T细胞中的耐用性和功能影响.
- 评估这种方法对CAR T细胞工程的潜在非目标效应和整体安全概况.
主要方法:
- 使用多重表观基因组编辑来准人体T细胞和前列腺癌特异性CAR T细胞中的PDCD1和LAG3基因.
- 进行了功能性测试,以比较表观遗传修饰的CAR-T细胞与父细胞.
- 进行了转录组分析,以评估基因沉默的耐用性,并确定潜在的非目标效应.
主要成果:
- 经过表观遗传修饰的CAR-T细胞表现出与其父细胞相似的功能特征.
- 在多个细胞分裂和重复的CAR刺激中,PDCD1和LAG3的基因沉默是持久的.
- 转录基因分析表明微小的脱效应,表明了有利的安全概况.
结论:
- 针对性表观基因组编辑是T细胞多重基因抑制的有效和安全方法.
- 这种方法为设计具有改进和可定制的抗癌功能的CAR T细胞提供了巨大的潜力.
- 在癌症免疫治疗中,表观基因组编辑为克服T细胞枯竭的现有方法提供了一个有希望的替代方案.
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