对损伤的反应是通过激活双价基因来表观遗传调节的
Benjamin I Tickman1, Jacquelyn R McDonald1, Ryan McCarthy1,2
1Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, Washington, United States.
American journal of physiology. Renal physiology
|January 7, 2026
概括
通过基因组修饰的表观遗传调节驱动损伤. 由Spi1 (PU.1) 等转录因子介导的双对应基因激活促进炎症和纤维化,表明脏修复失败.
科学领域:
- 表观遗传学和分子生物学
- 腎病理生理學 腎病理生理學
背景情况:
- 基质子的修改是细胞转换的关键.
- 双性 (H3K4me3/H3K27me3) 调节发育,但其在损伤中的作用尚不清楚.
研究的目的:
- 在 ischemia-reperfusion injury (IRI) 后,研究成年小鼠脏中的双价基因激活.
- 确定驱动损伤反应的表观遗传机制.
主要方法:
- 使用CUT&RUN数据开发了一种用于双价域的新型每基因评分方法.
- 分析了IRI后的基因组修饰 (H3K4me3,H3K27me3) 和基因转录变化.
- 确定了调节双价基因的转录因子.
主要成果:
- 成熟脏中的双重基因与胚胎领域重叠.
- IRI激活了一组双价基因的子集,标志着H3K27me3的损失,H3K4me3的增加和转录的增加.
- 上皮细胞中激活的双价基因与炎症和纤维化途径有关.
- 先进的转录因子Spi1 (PU.1) 在IRI后的小鼠和人类细胞中调解了这种表观遗传切换.
结论:
- 作用于双价染色体的转录因子通过炎症和纤维化促进损伤反应.
- 损伤进展可能代表表观遗传介导的修复失败.
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