Senescent myoblasts exhibit an altered exometabolome that is linked to senescence-associated secretory phenotype (SASP) signalling

Cellular senescence has been implicated in the aging-related dysfunction of satellite cells, the resident muscle stem cell population primarily responsible for the repair of muscle fibres. Despite being in a state of permanent cell cycle arrest, these cells remain metabolically active and release an abundance of factors that can have detrimental effects on the cellular microenvironment. This phenomenon is known as the senescence-associated secretory phenotype (SASP), and its metabolic profile is poorly characterized in senescent muscle. In the present investigation, we examined the intracellular and extracellular metabolome of C