晚期糖基化终末产物在肌少症发病机制中的作用研究进展

Research Progress in the Role of Advanced Glycation End Products in the Pathogenesis of Sarcopenia

肌少症是一种与年龄相关的疾病,其特征为肌肉质量减少与肌肉力量下降。肌少症会增加跌倒的风险,严重影响患者的生活质量,并可能与各种年龄相关的慢性疾病有关。晚期糖基化终末产物(AGE)是蛋白质、脂质或核酸等物质的游离氨基与还原糖的游离羰基经过缩合、重排、裂解和氧化修饰等一系列反应后形成的一类稳定糖基化产物。近期研究表明,AGE与肌肉质量、肌肉力量和肌少症之间都有相关性。AGE可以通过糖化交联导致骨骼肌细胞外基质硬化、与AGE受体结合导致炎症和氧化应激,进而造成肌肉质量和肌肉力量的下降,可在肌少症的发生和发展中发挥重要作用。本文对AGE在肌少症发病机制中的作用进行综述,可为深入探讨肌少症的发病机制提供理论支持。

Sarcopenia is an age-related condition characterized by a decrease in muscle mass and a decline in muscle strength.Sarcopenia increases the risk of falls,severely affecting the quality of life of patients,and it may be associated with various age-related chronic diseases.Advanced glycation end products(AGEs)are a class of stable glycation products produced by condensation,rearrangement,cleavage,and oxidative modification between the free amino groups of proteins,lipids or nucleic acids and the free carbonyl groups of reducing sugars.Studies have revealed associations of AGEs with muscle mass,muscle strength,and sarcopenia.AGEs can lead to hardening of the extracellular matrix of skeletal muscle through glycation cross-linking.The binding of AGEs to receptors induces inflammation and oxidative stress,consequently resulting in decreases in muscle mass and muscle strength.Therefore,AGEs may play a role in the occurrence and development of sarcopenia.This review summarizes the role of AGEs in the pathogenesis of sarcopenia,offering theoretical support for probing into the mechanisms underlying sarcopenia.