线粒体PDHA1乙化调节乳酸依赖的表观遗传重编程,通过NUAK2促进纤维化
Yujie Wang1,2,3, Guanglian Du1, Jinjin Zhang1,3
1Department of Respiratory and Critical Care Medicine, Binzhou Medical University Hospital, Binzhou Medical University, Binzhou, 256603, China.
Cellular and molecular life sciences : CMLS
|March 5, 2026
概括
一条新的途径将线粒体功能障碍与肺纤维化联系起来. 抑制pyruvate脱酶E1α亚单元 (PDHA1) 乙化和NUAK2可能为异常性肺纤维化 (IPF) 提供新的治疗方法.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 异形性肺纤维化 (IPF) 是一种致命的肺病,治疗方法有限.
- 代谢重编程与IPF有关,但线粒体功能障碍和表观遗传纤维化之间的联系尚不清楚.
研究的目的:
- 确定将线粒体代谢功能障碍与IPF中的表观遗传纤维化联系在一起的机制.
- 为了研究酸盐脱酶E1α子单元 (PDHA1) 在IPF病变发生过程中的作用.
主要方法:
- 利用纤维化模型研究素3 (SIRT3) 和PDHA1乙化的作用.
- 分析了代谢向糖解和乳酸生产的转变.
- 研究了基因组H4在K12 (H4K12la) 的表观遗传修饰及其对NUAK2表达的影响.
- 通过使用遗传和药物抑制来评估NUAK2在肌纤维细胞激活和纤维细胞进展中的作用.
主要成果:
- 降低SIRT3的调节导致PDHA1在Lys-83 (K83ac) 的过乙化,抑制了pyruvate dehydrogenase (PDH) 的活性.
- 这种抑制导致了代谢转向糖解,增加了乳酸盐的产生.
- 乳酸盐在K12 (H4K12la) 促进了基因组H4的乳化,激活了NUAK2超强增强剂并增加了NUAK2的表达.
- 抑制NUAK2逆转了PDHA1 K83ac的亲纤维效应,证实了其在纤维化中的作用.
结论:
- 发现了一种新的PDHA1 K83ac-H4K12la-NUAK2通路,在纤维化中整合了代谢和表观遗传信号.
- 这一途径促进了肌纤维细胞激活和纤维细胞在IPF中的进展.
- 向PDHA1脱乙和NUAK2抑制是IPF的潜在治疗策略.
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