O-GlcNAc通过EZH2调节肺纤维细胞中的抗纤维基因
Qiuming P Wu1, Shia Vang1, Jennifer Q Zhou1,2
1Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
Journal of cellular and molecular medicine
|March 18, 2024
概括
与O相关的N-乙糖胺 (O-GlcNAc) 修饰调节肺纤维细胞中的抗纤维基因. 抑制O-GlcNAc转移酶 (OGT) 在异常性肺纤维化 (IPF) 和TGF-β1治疗细胞中恢复抗纤维化基因表达.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 肺部医学 肺部医学
背景情况:
- 表观遗传修饰,包括H3K27me3,在像异常性肺纤维化 (IPF) 这样的纤维性疾病中使抗纤维基因沉默.
- 增强Zeste同源2 (EZH2) 的催化剂H3K27me3,其活性是由O-链接的N-乙糖胺 (O-GlcNAc) 的翻译后修饰调节的.
研究的目的:
- 研究O-GlcNAc和EZH2在调节抗纤维细胞基因循环氧化酶-2 (Cox2) 和血红氧化酶 (Hmox1) 的表达中的作用.
- 探索调节IPF肺纤维细胞中的O-GlcNAc和EZH2通路的治疗潜力.
主要方法:
- 在使用EZH2抑制剂 (EZP6438),O-GlcNAc转移酶 (OGT) 抑制剂 (OSMI-1) 和O-GlcNAcase (OGA) 抑制剂 (thiamet G) 的初级IPF和非IPF肺纤维细胞中检查了Cox2和Hmox1的表达.
- 用TGF-β1治疗非IPF纤维细胞,有或没有OGT抑制,以模仿纤维状况.
- 使用的染色体免疫沉 (ChIP) 试验用于评估H3K27me3在基因促进器区域的占用率.
主要成果:
- 在IPF纤维细胞和TGF-β1治疗的非IPF纤维细胞中,OGT抑制恢复了减少的Cox2和Hmox1表达.
- EZH2或OGT抑制降低了Cox2和Hmox1促进器区域的H3K27me3协会.
- 降低的O-GlcNAc水平导致EZH2水平和稳定性下降.
结论:
- 修改O-GlcNAc在调节肺纤维细胞中抗纤维细胞基因表达方面发挥了新的作用.
- 调节O-GlcNAc和EZH2通路为异常性肺纤维化 (IPF) 提供了潜在的治疗策略.
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