石化酸与TULP3结合,从而激活素和AMPK,从而减缓衰老
1State Key Laboratory for Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, China.
Nature
|December 18, 2024
概括
通过增强 sirtuin 活性来激活 AMP 激活的蛋白激酶 (AMPK),从而抑制真空 H+- ATPase (v- ATPase). 这种途径涉及TUB样蛋白3 (TULP3),模仿卡路里限制的好处,例如减缓衰老.
科学领域:
- 生物化学
- 分子生物学
- 老龄化研究
背景情况:
- 已知卡路里限制可以减缓衰老,部分是通过AMP激活蛋白激酶 (AMPK) 的激活.
- 在CR过程中积累了石化酸 (LCA),并激活了AMPK,但潜在的分子机制仍然难以捉摸.
- 了解LCA如何激活AMPK对于开发模仿CR健康益处的干预措施至关重要.
研究的目的:
- 阐明酸 (LCA) 激活AMP激活蛋白激酶 (AMPK) 的分子途径.
- 确定LCA的受体及其在AMPK激活中介作用.
- 证明已识别的途径可以重现卡路里限制的好处.
主要方法:
- 蛋白质组学分析以确定与LCA相互作用的蛋白质.
- 生物化学测定以测量酶活性 (siruins,v-ATPase,AMPK).
- 对老鼠,线虫和进行体内研究,以评估寿命和健康期.
主要成果:
- 这导致真空H+-ATPase (v-ATPase) 的脱乙烯化和抑制.
- 类似于TUB的蛋白3 (TULP3) 作为LCA的直接受体,可以全osterically激活sirtuins.
- 使用LCA激活TULP3-sirtuin-v-ATPase-AMPK途径可以使老鼠的肌肉复苏,并延长模型生物的寿命.
结论:
- 通过TULP3-sirtuin-v-ATPase轴激活AMPK,模仿卡路里限制的抗衰老作用.
- 针对这一途径提供了一种促进长寿和健康的新策略.
- 这些发现揭示了饮食,衰老和新陈代谢调节之间的保守分子机制.
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