通过SQOR减少ubiquinone的可以抑制ferroptosis
Namgyu Lee1,2, Sung Jin Park3, Mike Lange4,5
1Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA. namgyu.lee@dankook.ac.kr.
Nature metabolism
|February 13, 2024
概括
通过减少线粒体中的乌比金来快速保护细胞免受铁灭,独立于蛋白生产. 这种抗氧化作用涉及化和硫化氧降解酶,揭示了一个新的保护机制.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 营养科学 营养科学
背景情况:
- 是一种必不可少的微量营养素,以其通过蛋白质在抗氧化和细胞保护功能中的作用而闻名.
- 的快速保护作用背后的精确机制,特别是对抗氧化应激,仍然不完全理解.
研究的目的:
- 为了阐明保护细胞免受损伤的快速,非蛋白依赖的机制.
- 为了确定参与在线粒体中抗氧化活性的特定分子参与者.
主要方法:
- 研究了的代谢中间体化的作用.
- 评估了线粒体中乌比昆的减少.
- 作为潜在的催化酶,利用硫化氧化还原酶 (SQR).
- 在抑制蛋白合成的条件下对脂质过氧化和铁化进行评估的保护.
主要成果:
- 证明通过化直接降低线粒体中的乌比基.
- 鉴定了硫化氨酸氧降解酶作为这种泛氨酸降解的催化剂.
- 表明这种机制提供了快速的保护,防止脂质过氧化和铁亡,先 selenoprotein 合成.
- 证实,即使废除了蛋白生产,的保护作用也会发生.
结论:
- 通过不依赖蛋白的途径对铁亡产生快速的细胞保护作用.
- 这一途径涉及化直接通过化减少乌比奎农,由硫化氧降解酶催化.
- 这些发现扩大了已知的的生物功能,并确定了针对铁亡的新型调节机制.
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