免疫检查点抑制剂通过通过cGAS/STING通路促进巨细胞极化来调解心肌炎
Zhenzhu Cao1, Yu Zhang1, Huihui Jia1
1Department of Cardiology, Nanjing Drum Tower Hospital, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, 358 Zhongshan Road, 210008 Nanjing, China.
Cytokine
|January 30, 2025
概括
免疫检查点抑制剂可以通过激活cGAS-STING通路引起心肌炎. 这一途径导致巨细胞两极分化和自身免疫性心脏炎症,突出了一个新的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 心脏病学 心脏病学
- 在瘤学瘤学.
背景情况:
- 免疫检查点抑制剂 (ICI) 提供了新的癌症治疗策略,但可以诱导严重的心脏损伤.
- 循环GMP-AMP合成酶-干扰素基因激活器 (cGAS-STING) 途径与心血管炎症和自身免疫性疾病有关.
- 在ICI诱导心肌炎中cGAS-STING通路的作用仍然在很大程度上未知.
研究的目的:
- 研究cGAS-STING通路在免疫检查点抑制剂相关心肌炎中的病理生理学作用.
- 阐明ICI引发心脏炎症的机制.
主要方法:
- 通过使用抗PD-1抗体和心脏托罗素I来建立ICI相关心肌炎小鼠模型.
- 心脏功能和炎症通过心声回声和HE染色来评估.
- 使用免疫光学,电子显微镜,qPCR和流细胞计分析了巨细胞激活,DNA损伤和线粒体完整性.
主要成果:
- 在心肌炎模型中,ICI治疗诱导了DNA损伤,激活了cGAS-STING通路.
- 巨细胞线粒体损伤导致DNA释放,激活cGAS-STING并促进M1极化.
- 这种亲炎性巨细胞表型有助于自身免疫性心肌炎.
结论:
- 这种cGAS-STING通路是免疫检查点抑制剂诱导的心肌炎的关键调解者.
- 准cGAS-STING通路为管理ICI相关心脏毒性提供了一个潜在的治疗策略.
- 这些发现可能有助于ICI的更广泛的临床应用.
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