IGF1R通过调节DNA-PKcs介导的DNA损伤修复来促进辐射诱导的HSCs激活
Jiguo Lin1, Gang Zhao1, Jie Feng1
1NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun, China.
Frontiers in cell and developmental biology
|December 1, 2025
概括
电离辐射通过胰岛素样生长因子1受体 (IGF1R) 和DNA-PKcs相互作用促进DNA修复,从而激活肝细胞. 抑制这种途径可以防止辐射诱导的肝纤维化.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 辐射瘤学 辐射瘤学
- 分子生物学分子生物学
背景情况:
- 电离辐射 (IR) 可以导致肝纤维化,这是肝癌放射治疗的严重并发症.
- 肝星细胞 (HSC) 的激活是IR诱导的肝纤维化的核心.
- 胰岛素样生长因子1受体 (IGF1R) 在DNA损伤修复和HSC激活中的作用尚未完全理解.
研究的目的:
- 研究IGF1R调节高细胞中DNA损伤修复的机制.
- 探索IGF1R在IR诱导的HSC激活中的作用.
主要方法:
- 证实了IR诱导的HSC激活,DNA损伤以及IGF1R和DNA-PKcs的上调.
- 研究IGF1R-DNA-PKcs在促进DNA损伤修复和HSC激活方面的相互作用.
主要成果:
- 红外线诱导HSC激活,DNA损伤,以及IGF1R和DNA-PKcs的上调.
- IGF1R激活/过度表达通过与DNA-PKcs的相互作用促进IR诱导的HSC激活和DNA修复.
- IGF1R核转位促进PRKDC转录,细胞质与DNA-PKcs相互作用促进DNA修复.
结论:
- 抑制依赖IGF1R-DNA-PKcs的非同类末端结合 (NHEJ) 修复途径是防止IR诱导的高细胞激活的潜在策略.
- 这项研究阐明了IGF1R通过DNA-PKcs.调解IR诱导的HSC激活的新机制.
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