Exercice sous la loupe: comment l’activité physique remodele la biologie musculaire du vieillissement
DOI :
https://doi.org/10.18192/osurj.v5i1.8100Résumé
La sarcopénie est une maladie musculosquelettique liée à l’âge caractérisée par une perte progressive de masse musculaire squelettique, de force et de capacité régénératrice, contribuant à la fragilité, à la mobilité réduite et à une diminution de l’indépendance chez les personnes âgées. Bien que les thérapies pharmacologiques ciblant la dégénérescence musculaire continuent d’émerger, l’exercice reste l’une des interventions les plus efficaces et accessibles pour préserver la santé musculosquelettique au fil du vieillissement. Ce commentaire aborde l’étude de Liu et al., qui a utilisé des analyses transcriptomiques unicellulaires pour démontrer que l’exercice module la biologie tissulaire vieillissante par des mécanismes directs et indirects. L’exercice a directement influencé la signalisation inflammatoire, la communication avec les cellules souches et les voies régénératrices tout en améliorant indirectement les processus physiologiques plus larges associés au vieillissement sain et à la récupération fonctionnelle. En réduisant les signatures inflammatoires et en restaurant la communication intercellulaire au sein des muscles squelettiques vieillissants, l’exercice peut améliorer la régénération tissulaire au-delà de ses seuls effets sur la masse musculaire. Ces résultats soulignent l’importance croissante des stratégies basées sur la rééducation pour préserver la mobilité, améliorer la récupération et maintenir l’indépendance fonctionnelle des populations vieillissantes.
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