RIG-I激动剂促进抗原扩散,并促进胰腺管道腺癌中持久的CAR-T反应
Anne Marie Senz1, Bruno L Cadilha2, Julia Teppert1
1Institute of Clinical Pharmacology, LMU University Hospital, LMU Munich, Munich, Germany.
Journal for immunotherapy of cancer
|January 22, 2026
概括
合成的3p-RNA (酸诱导基因I激动剂) 与CAR-T疗法相结合,通过重编程瘤微环境和增强T细胞反应,有效治疗胰腺癌,从而产生持久的免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 在RNA治疗方面,RNA疗法.
背景情况:
- 胰腺管道腺癌 (PDAC) 由于T细胞透不良和免疫抑制瘤微环境,对CAR-T细胞疗法表现出耐药性.
- 挑战包括不足的T细胞透,敌对的瘤微环境和抗原损失,限制了CAR-T在PDAC中的有效性.
研究的目的:
- 在PDAC模型中研究合成3p-RNA (RIG-I激动剂) 和CAR-T细胞疗法的协同治疗潜力.
- 评估3p-RNA对瘤微环境和PDAC中的CAR-T细胞功能的影响.
主要方法:
- 利用合成和人体异种移植PDAC模型来评估治疗协同作用.
- 使用流细胞计,细胞因子阵列和ELISpot试验评估瘤生长,化学分泌,免疫细胞组成,CAR-T持久性和内源性T细胞反应.
主要成果:
- 3p-RNA诱导的I型干扰素和化学激素 (CCL5,CXCL9/10/11),将CAR-T细胞 (CCR5+/CXCR3+) 招募到瘤中.
- 通过3p-RNA激活RIG-I增强了CAR-T细胞的增殖,活性和持久性.
- 组合疗法在60% - 70%的小鼠中消除了已确定的PDAC瘤,治愈后的动物显示了抗原扩散和抗原阴性瘤的排斥.
结论:
- 通过3p-RNA的内RIG-I激活重新编程PDAC微环境,使其允许CAR-T细胞治疗.
- 这种组合疗法促进持久的多抗原免疫力,将3p-RNA定位为固体瘤的有前途的联合疗法.
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