Sarcopenia is an age-related degenerative skeletal muscle disorder characterized by the loss of skeletal muscle mass and function during aging.Sarcopenia can impair the elderly's ability to perform daily activities and is associated with high risks of falls,fractures,and hospitalization.It seriously affects the quality of life of the elderly and becomes one of the major health problems in the aging society.Skeletal muscle stem cells,also known as muscle satellite cells,play a key role in supporting muscle regeneration and homeostasis maintenance.Studies have suggested that muscle satellite cell functions are tightly regulated by microenvironment signals in the skeletal muscle.Of note,skeletal muscle fibers,serving as an immediate niche of muscle satellite cells,regulate their activation,proliferation,and self-renewal.This article reviews the research progress in the regulatory roles of skeletal muscle stem cells and their microenvironment in sarcopenia during aging,providing theoretical support for potential treatment of sarcopenia via modifying skeletal muscle microenvironment and regulating muscle satellite cell functions.
肌少症是以骨骼肌质量减少和功能下降为主要特征的临床综合征。肌少症患者易跌倒、骨折、增加住院率,严重降低老龄人群的生活质量,是老龄化社会面临的主要健康问题之一。骨骼肌干细胞,也称为肌卫星细胞,对于骨骼肌再生和稳态维持至关重要。研究表明骨骼肌微环境信号对骨骼肌干细胞功能具有重要调控作用。其中,骨骼肌纤维作为骨骼肌干细胞的直接微环境,调控骨骼肌干细胞的激活、增殖和自我更新。本文主要综述骨骼肌干细胞及其微环境调控肌少症的研究进展,为深入探讨通过改善骨骼肌微环境进而调控骨骼肌干细胞功能靶向治疗肌少症提供理论支持。.
Keywords: microenvironment; muscle satellite cell; sarcopenia; skeletal muscle stem cell.