高葡萄糖通过下调SIRT1诱导FABP3介导的膜刚性
Seung-Min Lee1, Ju Yeon Kwak2, Dongryeol Ryu3
1Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea.
Biochimica et biophysica acta. General subjects
|April 3, 2025
概括
高血糖水平增加了骨肌肉中的FABP3表达,改变了膜的特性,并可能导致肌肉衰弱. 这将高血糖与通过脂质变化的肌肉功能受损联系在一起.
科学领域:
- 分子生物学分子生物学
- 代谢研究研究 代谢研究
- 骨肌肉生理学 骨肌肉生理学
背景情况:
- 高血糖水平会对骨肌产生负面影响,导致质量和力量的损失.
- 肌肉中葡萄糖毒性的确切机制,特别是关于脂质组成的确切机制,仍然不清楚.
研究的目的:
- 研究脂肪酸结合蛋白3 (FABP3) 在高血糖条件下的骨肌肉中的作用.
- 阐明将高葡萄糖与肌肉膜性质和功能的改变联系在一起的分子机制.
主要方法:
- 对BXD现象资源的分析,以确定与高血糖相关的基因.
- 在各种高血糖小鼠模型 (ob/ob,Ins2Akita,高脂肪养) 和老年小鼠中检查FABP3表达.
- 在体外研究中使用培养的髓管来评估FABP3通过高葡萄糖,NAD+/NADH比率和SIRT1活性调节.
主要成果:
- 骨肌中的FABP3表达增加与高血糖严重相关.
- 在多个高血糖和老年小鼠模型中,以及暴露于高葡萄糖的培养肌管中,FABP3水平升高.
- 肌管中高葡萄糖诱导的FABP3上调与膜流动性降低有关,并取决于NAD+/NADH比率和SIRT1活性.
结论:
- FABP3作为一个关键的调解者,将高血糖与骨肌肉膜物理化学性质的有害变化联系起来.
- 升高的FABP3可能会导致在高血糖期间在骨肌肉中观察到的收缩和代谢功能受损.
- 在高葡萄糖条件下,NAD+/NADH比率和SIRT1活性参与FABP3的上调.
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