在CAR T细胞中使用微RNA介导基因沉默的多重工程
Giulia Golinelli1,2, John Scholler1, Audrey Roussel-Gervais3
1Center for Cellular Immunotherapies, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
Frontiers in immunology
|September 8, 2025
概括
向型微RNA (miRNA) 为CAR T细胞疗法提供了基因编辑的更安全的替代方案,增强了抗瘤活性,持久性和免疫逃避,没有DNA风险.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞疗法细胞疗法
- 分子生物学分子生物学
背景情况:
- 多重基因编辑的CAR T细胞疗法面临着挑战,包括来自DNA双链断裂的致癌风险.
- 向型微RNAs (miRNAs) 为基因沉默提供了更安全,可调节的替代方案,避免了DNA编辑.
- 这项研究探讨了CAR T细胞中基于miRNA的多重基因沉默.
研究的目的:
- 在CAR T细胞中使用优化的miRNA方法来证明多重基因沉默.
- 为了比较miRNA介导的基因沉默与CRISPR/Cas9基因编辑的有效性和安全性.
- 评估miRNA沉默的CAR T细胞的抗瘤活性和免疫逃避能力.
主要方法:
- 改造了miRNA表达录音带,将其转化为M5CAR晶状病毒载体,用于多重基因沉默 (TCR,MHC-I).
- 比较了miRNA沉默 (S) M5CAR T细胞与CRISPR/Cas9淘汰 (KO) M5CAR T细胞.
- 在胰腺管腺癌模型中评估了体外和体内抗瘤活性.
主要成果:
- 沉默的M5CAR T细胞表现出与KO细胞相比的或更高的抗瘤功能.
- 在体内研究显示,S M5CAR T细胞增强了瘤控制,持久性和转移预防.
- 在体外测试显示,对全活性NK细胞和PBMCs的耐药性增加.
结论:
- 通过miRNAs进行可定位多重基因沉默,为CAR T细胞提供了基因编辑的可行替代方案.
- 这种miRNA策略在效力,持久性,转移预防和免疫逃避方面提供了潜在的优势.
- 它可以克服瘤诱导的免疫抑制,同时减轻与DNA双链断裂相关的风险.
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