硫化通过调节铁灭亡来改善衰老动脉中的内皮功能障碍
Yuxin Miao1, Shuangshuang Zhang1, Zihui Liang1
1Department of Physiology, Institute of Basic Medicine, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, China.
Nitric oxide : biology and chemistry
|October 24, 2023
概括
衰老会损害血管内皮功能,原因是硫化 (H2S) 的减少和铁亡的增加. 补充H2S通过降低脂质过氧化和老化血管中的铁化来改善功能.
科学领域:
- 心血管生物学 心血管生物学
- 衰老研究研究 衰老研究
- 内皮细胞功能 内皮细胞功能
背景情况:
- 衰老与血管内皮功能障碍有关,这是心血管疾病的关键因素.
- 降低内源硫化 (H2S) 水平和增加的氧化应激导致血管衰老.
- 铁亡,一种受调节的细胞死亡形式,已与内皮功能障碍有关.
研究的目的:
- 研究与年龄相关的血管内皮功能障碍背后的机制.
- 确定内源H2S生产和铁死在动脉衰老中的作用.
- 评估H2S在改善衰老中的内皮功能障碍方面的治疗潜力.
主要方法:
- 来自老年患者的血和动脉组织的分析和年龄匹配的对照.
- 利用动物模型 (SD大鼠) 研究动脉中的H2S和铁亡.
- 实验性干预包括NaHS,费罗斯塔丁-1 (ferroptosis抑制剂) 和埃拉斯 (ferroptosis诱导剂) 的使用.
主要成果:
- 老年人表现出下调的囊甲酶 (CSE) 蛋白表达,血H2S减少,脂质过氧化升高和铁积累,导致铁和脏动脉内皮功能受损.
- 补充H2S增强了CSE表达,促进了内源H2S的产生,降低了脂质过氧化,并抑制了铁,从而改善了老年人群和动物模型中的血管内皮功能.
- NaHS治疗,Ferrostatin-1和埃拉斯调节与铁亡相关的蛋白质,NaHS和Ferrostatin-1抑制铁亡并改善内皮功能.
结论:
- 衰老中的内皮功能障碍与血管内皮细胞内源性H2S水平降低和铁亡密切相关.
- H2S通过降低脂质过氧化和抑制铁化起着保护作用,从而改善老化血管系统中的内皮功能.
- 准H2S通路和铁死是一种有前途的治疗策略,用于与年龄相关的血管内皮功能障碍.
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