Abstract
Aim: This study explored the effects of blood flow restriction (BFR) on mRNA responses of PGC-1α (total, 1α1, and 1α4) and Na+,K+-ATPase isoforms (NKA; α1-3, β1-3, and FXYD1) to an interval running session and determined whether these effects were related to increased oxidative stress, hypoxia, and fibre type-specific AMPK and CaMKII signalling, in human skeletal muscle. Methods: In a randomized, crossover fashion, 8 healthy men (26 ± 5 year and 57.4 ± 6.3 mL kg−1 min−1) completed 3 exercise sessions: without (CON) or with blood flow restriction (BFR), or in systemic hypoxia (HYP, ~3250 m). A muscle sample was collected before (Pre) and after exercise (+0 hour, +3 hours) to quantify mRNA, indicators of oxidative stress (HSP27 protein in type I and II fibres, and catalase and HSP70 mRNA), metabolites, and α-AMPK Thr172/α-AMPK, ACC Ser221/ACC, CaMKII Thr287/CaMKII, and PLBSer16/PLB ratios in type I and II fibres. Results: Muscle hypoxia (assessed by near-infrared spectroscopy) was matched between BFR and HYP, which was higher than CON (~90% vs ~70%; P
RAS ID
28140
Document Type
Journal Article
Date of Publication
2018
Location of the Work
United Kingdom
School
School of Medical Sciences
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Australia License.
Publisher
Wiley-Blackwell
Recommended Citation
Christiansen, D., Murphy, R. M., Stathis, C. G., & Bishop, D. (2018). Increased FXYD1 and PGC-1α mRNA after blood flow-restricted running is related to fibre type-specific AMPK signalling and oxidative stress in human muscle. DOI: https://doi.org/10.1111/apha.13045
Comments
Christiansen, D., Murphy, R. M., Bangsbo, J., Stathis, C. G., & Bishop, D. J. (2018). Increased FXYD1 and PGC‐1α mRNA after blood flow‐restricted running is related to fibre type‐specific AMPK signalling and oxidative stress in human muscle. Acta Physiologica, 223(2), e13045. Available here.