Abstract
How regular physical activity is able to improve health remains poorly understood. The release of factors from skeletal muscle following exercise has been proposed as a possible mechanism mediating such systemic benefits. We describe a mechanism wherein skeletal muscle, in response to a hypertrophic stimulus induced by mechanical overload (MOV), released extracellular vesicles (EVs) containing muscle-specific miR-1 that were preferentially taken up by epidydimal white adipose tissue (eWAT). In eWAT, miR-1 promoted adrenergic signaling and lipolysis by targeting Tfap2alpha, a known repressor of Adrbeta3 expression. Inhibiting EV release prevented the MOV-induced increase in eWAT miR-1 abundance and expression of lipolytic genes. Resistance exercise decreased skeletal muscle miR-1 expression with a concomitant increase in plasma EV miR-1 abundance, suggesting a similar mechanism may be operative in humans. Altogether, these findings demonstrate that skeletal muscle promotes metabolic adaptations in adipose tissue in response to MOV via EV-mediated delivery of miR-1.
Original language | American English |
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Pages (from-to) | e21644 |
Journal | FASEB Journal |
Volume | 35 |
Issue number | 6 |
DOIs | |
State | Published - 2021 |
Bibliographical note
Vechetti, Ivan J Jr Peck, Bailey D Wen, Yuan Walton, R Grace Valentino, Taylor R Alimov, Alexander P Dungan, Cory M Van Pelt, Douglas W von Walden, Ferdinand Alkner, Bjorn Peterson, Charlotte A McCarthy, John J eng R01 DK119619/DK/NIDDK NIH HHS/ Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't FASEB J. 2021 Jun;35(6):e21644. doi: 10.1096/fj.202100242R.Keywords
- Adipose Tissue, White/*physiopathology Adolescent Adult Animals *Exercise Extracellular Vesicles/*physiology Female Gene Expression Regulation Humans *Lipolysis Male Mice Mice, Inbred C57BL MicroRNAs/*genetics Middle Aged Muscle, Skeletal/*physiopathology *Stress, Mechanical Transcription Factor AP-2/genetics/*metabolism Young Adult *adipose tissue *extracellular vesicles *microRNAs *skeletal muscle