Exercise-Induced Exerkines Modulate Autophagy: Implications for Interorgan Crosstalk in the Hallmarks of Ageing.

Population aging and widespread sedentary lifestyles have increased the prevalence of chronic non-communicable diseases, many of which are linked to progressive disruptions of cellular homeostasis. Autophagy(definition), a conserved cellular degradation and recycling pathway, plays a central role in maintaining metabolic flexibility, proteostasis(definition), and organ function. However, aging and physical inactivity impair autophagic regulation, thereby contributing to the development of sarcopenia, cardiovascular diseases, metabolic disorders, and neurodegenerative diseases. Physical exercise is a non-pharmacological intervention that can restore autophagic activity and confer systemic health benefits in multiple preclinical and clinical contexts. Increasing evidence indicates that these benefits are mediated not only by local tissue adaptations but also by complex inter-organ communication. Central to this process are exercise-induced bioactive factors, collectively termed exerkines, including myokines, cardiokines, adipokines, hepatokines, osteokines, and circulating miRNAs. Rather than acting independently, exerkines form an integrated signaling network that fine-tunes autophagic flux across multiple tissues. Exerkine-mediated regulation of autophagy involves key pathways such as AMPK/mTOR(definition), FoxO, SIRT1, ULK1, and TFEB, thereby coordinating energy metabolism, mitochondrial quality control, inflammation, and protein turnover in skeletal muscle, heart, liver, adipose tissue, bone, and the central nervous system. This review summarizes current evidence on representative exerkines and their roles in autophagy-dependent inter-organ crosstalk, highlighting the exercise-exerkine-autophagy axis as a promising target for preventing and managing chronic diseases.