在HUVEC中,SIRT3调节PDHA1的乙化,以调节在克林旋转下炎症和热
Min Jiang1, Junjie Shao2,3, Kun Lin4
1Department of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing 100853, China.
iScience
|December 1, 2025
概括
模拟微重力抑制SIRT3,导致内皮炎症和细胞死亡. 恢复SIRT3或PDHA1可以防止这些影响,这表明了宇航员血管健康的新目标.
科学领域:
- 细胞生物学 细胞生物学
- 太空医学 太空医学
- 线粒体的新陈代谢
背景情况:
- 微重力会导致宇航员的内皮炎症和心血管问题.
- 将微重力与内皮功能障碍联系在一起的代谢途径尚未完全理解.
- 锡图因-3 (SIRT3) 是一种线粒体脱乙酶,调节新陈代谢和氧化还原平衡.
研究的目的:
- 研究SIRT3在微重力诱导的内皮炎症中的作用.
- 在模拟的微重力条件下阐明底层内皮功能障碍的代谢机制.
- 确定在太空飞行期间维持血管健康的潜在治疗点.
主要方法:
- 使用二维clinorotation来模拟人类脉内皮细胞 (HUVECs) 中的微重力.
- 评估了SIRT3表达,线粒体功能,NLRP3炎症酶激活和热.
- 研究了酸盐脱酶E1α (PDHA1) 乙化和活性的作用.
主要成果:
- 模拟的微重力抑制了SIRT3,导致线粒体功能障碍,NLRP3炎症酶激活,以及HUVECs中的烧灭.
- 过度表达SIRT3可以防止这些影响,而SIRT3抑制则会使这些影响恶化.
- SIRT3缺乏增加了PDHA1乙化,抑制了pyruvate dehydrogenase复合体 (PDHC) 的活性,并促进了糖解. PDHA1操纵恢复了线粒体功能,并减少了炎症.
结论:
- 在模拟微重力条件下,SIRT3-PDHA1轴是线粒体代谢和内皮炎症之间的关键联系.
- 针对SIRT3-PDHA1通路可能提供一种策略,以保持宇航员的血管健康.
- 了解这些代谢变化是减轻太空飞行引起的心血管风险的关键.
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