在急性电离辐射中介的DNA损伤时,STING与PAR直接相互作用,促进细胞亡
Yirong Sun1,2, Saba R Aliyari3, Kislay Parvatiyar3,4
1CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China. sun_yirong@gibh.ac.cn.
Cell death and differentiation
|February 12, 2025
概括
干扰素基因 (STING) 和多 (ADP-ribose) (PAR) 的刺激器对辐射诱导的亡至关重要. STING与PAR结合,促进细胞死亡,抑制这种途径可以防止辐射损伤和急性辐射综合征.
科学领域:
- 辐射生物学 辐射生物学
- 分子和细胞生物学分子和细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 急性电离辐射 (IR) 诱导DNA损伤,细胞循环停止和细胞死亡.
- 干扰素基因刺激器 (STING) 在红外诱导反应中的确切作用和信号通路尚不清楚.
- 了解STING在红外线中介组织损伤中的作用至关重要.
研究的目的:
- 阐明STING在对急性电离辐射 (IR) 的反应中的作用和信号通路.
- 为了研究STING和聚 (ADP-ribose) (PAR) 在IR诱导的亡中的相互作用.
- 评估针对STING-PAR通路进行辐射保护的治疗潜力.
主要方法:
- 在体外和体内实验中使用野生类型 (WT) 和刺痛缺陷 (Stinggt-/gt-) 细胞和小鼠进行实验.
- 对亡,STING酸化和基因表达的分析 (PUMA,Bax).
- 使用PJ34.1进行聚 (ADP-ribose) 聚合酶-1 (PARP1) 的药理抑制.
主要成果:
- 在急性IR诱导的DNA损伤后,STING对于促进亡至关重要.
- STING 直接与激活的 PARP1 在 IR 上产生的 PAR 结合.
- 抑制PARP1或STING缺陷显著降低了IR诱导的亡,并防止腹部辐射和急性辐射综合征.
- 减少的亡与减少的PUMA表达和Bax线粒体局部化有关.
结论:
- 在通过PUMA-Bax通路调解IR诱导的亡中,STING和PAR起着至关重要的作用.
- 针对STING-PAR相互作用或PARP1活动提供了一种潜在的治疗策略,以减轻辐射诱导的亡及其后果.
- 这些发现对管理急性辐射症状和改善放射治疗结果具有重大意义.
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