HIF1A促进了H3K27ac修饰的缺氧诱导的变化,以促进肌体收缩性
Kaiyuan Ji1, Bolun Wen1, Xiaodi Wang1
1Guangzhou Key Laboratory of Maternal-Fetal Medicine, Institute of Reproductive Health and Perinatology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, China.
Communications biology
|March 22, 2025
概括
在分娩期间的缺氧会通过改变基因表达和基因素修饰来加剧肌体收缩. 缺氧诱导因子1-alpha (HIF1A) 调解这些表观遗传变化,为分娩障碍提供潜在的治疗点.
科学领域:
- 生殖生物学 生殖生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生理学分子生理学
背景情况:
- 在分娩期间肌子宫缺氧会加剧收缩.
- 之前的研究没有记录下基因表达和基因组修饰在缺氧下肌肉细胞的变化.
研究的目的:
- 为了研究缺氧对人类肌肉纤维平滑肌细胞 (hMSMCs) 收缩性,基因表达和表观遗传修饰的影响.
- 为了确定关键的调解者和特定的表观遗传变化涉及缺氧诱导的肌体收缩性.
主要方法:
- RNA测序 (RNA-seq) 用于识别差异表达的基因.
- 染色体免疫沉 (ChIP) 和Hi-ChIP用于分析组织蛋白修饰 (H3K27ac,H3K4me1,H3K27me3,H3K4me3).
- 增强器和超级增强器区域的识别;HIF1A敲击实验用于验证.
主要成果:
- 缺氧增强了hMSMC收缩性,并改变了2,262个基因的表达.
- 低氧诱导因子1-alpha (HIF1A) 被确定为增强体区域H3K27ac修饰的关键调解者.
- 抑制HIF1A降低了与劳动相关的基因 (例如CXCL8,RUNX1,IL-6,PTGES3) 和它们相关的H3K27ac修饰的表达.
结论:
- HIF1A调解了低氧诱导的H3K27ac组织蛋白修饰的变化,以调节肌肉细胞收缩性.
- 这些发现揭示了与肌肉功能相关的分娩障碍的潜在治疗和干预目标.
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