Wadley (2019) Redox Proteins & Acute Exercise (accepted).docx.pdf (509.56 kB)

Characterisation of extracellular redox enzyme concentrations in response to exercise in humans

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journal contribution
posted on 15.07.2019, 10:24 by Alexander J. Wadley, Gary Keane, Tom Cullen, Lynsey James, Jordan Vautrinot, Matthew Davies, Bethan Hussey, David J. Hunter, Sarabjit Mastana, Adrian Holliday, Steen V. Petersen, Nicolette Bishop, Martin Lindley, Steven J. Coles
Redox enzymes are ubiquitous proteins that modulate intracellular redox balance and can be secreted in response to cellular oxidative stress, potentially modulating systemic inflammation. Both aerobic and resistance exercise are known to cause acute systemic oxidative stress and inflammation; however, how redox enzyme concentrations alter in extracellular fluids following bouts of either type of exercise is unknown. Recreationally active males (n=26, age 28 ± 8 years) took part in either: 1) two separate energy-matched cycling bouts: one of moderate intensity (MOD) and a bout of high intensity interval exercise (HIIE) or 2) a resistance exercise protocol. Alterations in plasma (study 1) and serum (study 2) peroxiredoxin (PRDX)-2, PRDX-4, superoxide dismutase-3 (SOD3), thioredoxin (TRX-1), TRX-reductase and Interleukin (IL)-6 were assessed before and at various timepoints after exercise. There was a significant increase in SOD3 (+1.5 ng/mL) and PRDX-4 (+5.9 ng/mL) concentration following HIIE only, peaking at 30- and 60-min post-exercise respectively. TRX-R decreased immediately and 60-min following HIIE (-7.3 ng/mL) and MOD (-8.6 ng/mL) respectively. In non-resistance trained males, no significant changes in redox enzyme concentrations were observed up to 48 hours following resistance exercise, despite significant muscle damage. IL-6 concentration increased in response to all trials, however there was no significant relationship between absolute or exercise-induced changes in redox enzyme concentrations. These results collectively suggest that HIIE, but not MOD or eccentric exercise increase the extracellular concentration of PRDX-4 and SOD3. Exercise-induced changes in redox enzyme concentration do not appear to directly relate to systemic changes in IL-6 concentration.

Funding

This research was supported by the University of Worcester and the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre.

History

School

  • Sport, Exercise and Health Sciences

Published in

Journal of Applied Physiology

Volume

127

Issue

3

Pages

858 - 866

Citation

WADLEY, A.J. ... et al., 2019. Characterisation of extracellular redox enzyme concentrations in response to exercise in humans. Journal of Applied Physiology, 127 (3), pp.858-866.

Publisher

© American Physiological Society

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Journal of Applied Physiology and the definitive published version is available at https://doi.org/10.1152/japplphysiol.00340.2019.

Acceptance date

20/06/2019

Publication date

2019-06-27

eISSN

1522-1601

Language

en