硫化通过调节基因表达和减少硫化甲基化的作用来减轻人体心肌细胞中PMA诱导的过度缩小
Taeyoon Jung1, Suhyeon Kim1, Eileen Hoeun Son1
1Department of Medicinal Chemistry, School of Pharmacy, University of Washington, Seattle, WA, United States.
Biochemical pharmacology
|December 26, 2025
概括
硫化 (H2S) 通过调节应激通路并减少自身甲基化,减轻心脏缩. 这表明,准H2S代谢是治疗心脏病的潜在疗法.
科学领域:
- 心血管生物学 心血管生物学
- 分子心脏病学分子心脏病学
- 气体传递器信号传输
背景情况:
- 心脏缩会增加心脏质量和心脏壁厚度,以维持输出.
- 硫化 (H2S) 是一种内源性气体递质,在心脏缩中没有明确的作用.
- 博12-米里沙特13-乙酸 (PMA) 用于诱导人体腹腔心肌细胞 (hCM) 的缩.
研究的目的:
- 研究H2S对PMA诱导的hCM心脏缩的影响.
- 确定H2S在缩中的作用背后的分子机制.
- 探索H2S代谢及其作为治疗点的潜力.
主要方法:
- 在使用PMA的hCM中诱导心脏缩.
- 作为H2S捐赠体,使用硫化 (NaSH).
- 利用RNA测序和KEGG通路分析来识别差异表达的基因和信号通路.
- 评估了醇甲基转移酶 (TMT) 表达和甲乙醇 (CH3SH) 水平.
主要成果:
- PMA治疗增加了细胞大小和BNP/NPPB表达,伴随着内源H2S和cystathionine γ-lyase (CSE) 水平的升高.
- NaSH补充剂减少了BNP/NPPB的表达,并调节了3600多个基因.
- H2S影响了AMPK,MAPK,GnRH信号传递,焦点粘附和亡途径.
- 在高增殖细胞中观察到CH3SH水平和TMT表达的降低.
- 外源性CH3SH加剧了缩和调高了产生H2S的酶.
结论:
- H2S通过调节应激反应信号来减轻hCM中的心脏缩.
- H2S抑制了自身的甲基化,表明了一个调节反循环.
- 准H2S代谢是一个潜在的治疗策略,用于心脏缩.
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