Faculty Publications
The Biphasic Activity of Autophagy and Heat Shock Protein Response in Peripheral Blood Mononuclear Cells Following Acute Resistance Exercise in Resistance-Trained Males
Document Type
Article
Keywords
Autophagy, Branched-chain amino acids, Heat shock proteins, Proteostasis, Resistance exercise, Training
Journal/Book/Conference Title
European Journal of Applied Physiology
Abstract
Purpose: Autophagy and heat shock protein (HSP) response are proteostatic systems involved in the acute and adaptive responses to exercise. These systems may upregulate sequentially following cellular stress including acute exercise, however, currently few data exist in humans. This study investigated the autophagic and HSP responses to acute intense lower body resistance exercise in peripheral blood mononuclear cells (PBMCs) with and without branched-chain amino acids (BCAA) supplementation. Methods: Twenty resistance-trained males (22.3 ± 1.5 yr; 175.4 ±.7 cm; 86.4 ± 15.6 kg) performed about of intense lower body resistance exercise and markers of autophagy and HSP70 were measured immediately post- (IPE) and 2, 4, 24, 48, and 72 h post-exercise. Prior to resistance exercise, 10 subjects were randomly assigned to BCAA supplementation of 0.22 g/kg/d for 5 days pre-exercise and up to 72 h following exercise while the other 10 subjects consumed a placebo (PLCB). Results: There were no difference in autophagy markers or HSP70 expression between BCAA and PLCB groups. LC3II protein expression was significantly lower 2 and 4 h post-exercise compared to pre-exercise. LC3II: I ratio was not different at any time point compared to pre-exercise. Protein expression of p62 was lower IPE, 2, and 4 h post-exercise and elevated 24 h post-exercise. HSP70 expression was elevated 48 and 72 h post-exercise. Conclusions: Autophagy and HSP70 are upregulated in PBMCs following intense resistance exercise with autophagy increasing initially post-exercise and HSP response in the latter period. Moreover, BCAA supplementation did not affect this response. Graphical Abstract: (Figure presented.)
Department
Department of Kinesiology
Original Publication Date
5-21-2024
DOI of published version
10.1007/s00421-024-05503-5
Recommended Citation
Escobar, Kurt A.; VanDusseldorp, Trisha A.; Johnson, Kelly E.; Stratton, Matthew; McCormick, James J.; Moriarity, Terence; Dokladny, Karol; Vaughan, Roger A.; Kerksick, Chad M.; Kravitz, Len; and Mermier, Christine M., "The Biphasic Activity of Autophagy and Heat Shock Protein Response in Peripheral Blood Mononuclear Cells Following Acute Resistance Exercise in Resistance-Trained Males" (2024). Faculty Publications. 5996.
https://scholarworks.uni.edu/facpub/5996
