RIPK1感知到S-adenosylmethionine稀缺,从而导致细胞死亡和炎症
Zezhao Chen1, Xiaosong Gu2, Hongbo Chen3
1Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 201210, China; University of Chinese Academy of Sciences, Beijing 101408, China.
Cell metabolism
|June 26, 2025
概括
RIPK1通过其代谢物SAM感知氨酸水平,作为细胞死亡的制动剂. 这种营养感应途径的干扰会触发亡和炎症,影响代谢平衡.
科学领域:
- 细胞生物学 细胞生物学
- 代谢调节 代谢调节 代谢调节
- 细胞死亡的分子机制
背景情况:
- 细胞营养感应对于维持新陈代谢平衡至关重要,但营养信号和细胞死亡途径之间的联系尚未完全理解.
- 代谢过程的失调会导致细胞死亡和疾病.
研究的目的:
- 阐明细胞感知营养可用性的机制,并将这些信号与细胞生存或死亡决策联系起来.
- 研究RIPK1在调解细胞对营养物质波动的反应中的作用,特别是 metionin及其代谢物SAM.
主要方法:
- 在细胞模型中研究了RIPK1,氨酸和S-adenosylmethionine (SAM) 之间的相互作用.
- 使用生物化学试验来分析PRMT5.5在Arg606的RIPK1的SAM介导二甲基化.
- 研究了代谢干扰,包括氨酸限制和改变的单碳流,对RIPK1激活和细胞命运的影响.
主要成果:
- RIPK1作为氨酸和SAM的传感器,调节细胞生存和死亡.
- 通过PRMT5在Arg606中对RIPK1进行SAM介导的二甲基化,作为防止RIPK1激活的保护机制.
- 由于代谢问题而降低的SAM水平会损害这种保护车,导致RIPK1的自我关联,激活,亡和炎症.
结论:
- RIPK1作为关键传感器,将甲和单碳代谢与细胞生死决策联系起来.
- 这些发现确定RIPK1是细胞命运的代谢控制中的关键参与者.
- RIPK1代表了与异常SAM可用性和代谢功能障碍相关的疾病的潜在治疗标.
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