Cited by 99Exercise and Physiological ResponsesCardiovascular and exercise physiologyMuscle Physiology and Disorders

Infusion with the antioxidant N‐acetylcysteine attenuates early adaptive responses to exercise in human skeletal muscle

Petersen, A. C., McKenna, M. J., Medved, I., Murphy, K. T., Brown, M. J., Della Gatta, P., Cameron‐Smith, D.·2012·Acta Physiologica

Abstract

AIM: Production of reactive oxygen species (ROS) in skeletal muscle is markedly increased during exercise and may be essential for exercise adaptation. We, therefore, investigated the effects of infusion with the antioxidant N-acetylcysteine (NAC) on exercise-induced activation of signalling pathways and genes involved in exercise adaptation in human skeletal muscle. METHODS: Subjects completed two exercise tests, 7 days apart, with saline (control, CON) or NAC infusion before and during exercise. Exercise tests comprised of cycling at 71% VO(2peak) for 45 min, and then 92% VO(2peak) to fatigue, with vastus lateralis biopsies at pre-infusion, after 45-min cycling and at fatigue. RESULTS: Analysis was conducted on the mitogen-activated protein kinase signalling pathways, demonstrating that NAC infusion blocked the exercise-induced increase in JNK phosphorylation, but not ERK1/2, or p38 MAPK. Nuclear factor-κB p65 phosphorylation was unaffected by exercise; however, it was reduced in NAC at fatigue by 14% (P < 0.05) compared with pre-infusion. Analysis of exercise and/or ROS-sensitive genes demonstrated that exercise-induced mRNA expression is ROS dependent of MnSOD, but not PGC-1α, interleukin-6, monocyte chemotactic protein-1, or heat-shock protein 70. CONCLUSION: These results suggest that inhibition of ROS attenuates some skeletal muscle cell signalling pathways and gene expression involved in adaptations to exercise.

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Crossref · 10.1111/j.1748-1716.2011.02344.x

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Authors
Petersen, A. C., McKenna, M. J., Medved, I., Murphy, K. T., Brown, M. J., Della Gatta, P., & Cameron‐Smith, D.
Affiliations
  • Deakin University (AU)
  • Victoria University (AU)
Corresponding author
Petersen, A. C.
Venue
Acta Physiologica
Publisher
Wiley
Published
2011-09-29
Volume
204
Issue
3
Pages
382-392
ISSN
  • 1748-1708 (ISSN-L)
  • 1748-1716
OpenAlex
W2167217629
Cited by
99
References
54
Citations by year
2026: 4 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 7 · 2019: 3 · 2018: 7 · 2017: 9 · 2016: 13 · 2015: 10 · 2014: 11 · 2013: 8 · 2012: 9
FWCI
9.40
Type
journal article
Language
en
Open access
closed
Locations
  • Acta Physiologica (publishedVersion)
  • PubMed (publishedVersion)
  • Victoria University Research Repository (Victoria University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
N-acetylcysteine, antioxidant supplementation, reactive oxygen species, exercise adaptation, skeletal muscle, mitogen-activated protein kinase, JNK phosphorylation, NF-κB p65, manganese superoxide dismutase, PGC-1α, interleukin-6, MCP-1, HSP70, exercise fatigue, vastus lateralis
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, NF-KappaB Inhibitor alpha, Acetylcysteine, Adaptation, Physiological, Adult, Analysis of Variance, Antioxidants, Bicycling, Biopsy, Double-Blind Method, Gene Expression Regulation, Heat-Shock Proteins, Humans, Infusions, Intravenous, Male, Muscle Contraction, Oxygen Consumption, Phosphorylation, RNA, Messenger, Superoxide Dismutase, Time Factors, Transcription Factors, Victoria, Signal Transduction, Exercise, Interleukin-6, NF-kappa B, Reactive Oxygen Species, Oxidative Stress, Cross-Over Studies, Muscle Fatigue, HSP70 Heat-Shock Proteins, Chemokine CCL2, I-kappa B Proteins, JNK Mitogen-Activated Protein Kinases, Quadriceps Muscle, Young Adult

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