Cited by 107Exercise and Physiological ResponsesRedox biology and oxidative stressMuscle Physiology and Disorders

Skeletal Muscle Contractions Induce Acute Changes in Cytosolic Superoxide, but Slower Responses in Mitochondrial Superoxide and Cellular Hydrogen Peroxide

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Pearson, Timothy, Kabayo, Tabitha, Ng, Rainer, Chamberlain, Jeffrey, McArdle, Anne, Jackson, Malcolm J.·2014·PLoS ONE

Abstract

Skeletal muscle generation of reactive oxygen species (ROS) is increased following contractile activity and these species interact with multiple signaling pathways to mediate adaptations to contractions. The sources and time course of the increase in ROS during contractions remain undefined. Confocal microscopy with specific fluorescent probes was used to compare the activities of superoxide in mitochondria and cytosol and the hydrogen peroxide content of the cytosol in isolated single mature skeletal muscle (flexor digitorum brevis) fibers prior to, during, and after electrically stimulated contractions. Superoxide in mitochondria and cytoplasm were assessed using MitoSox red and dihydroethidium (DHE) respectively. The product of superoxide with DHE, 2-hydroxyethidium (2-HE) was acutely increased in the fiber cytosol by contractions, whereas hydroxy-MitoSox showed a slow cumulative increase. Inhibition of nitric oxide synthases increased the contraction-induced formation of hydroxy-MitoSox only with no effect on 2-HE formation. These data indicate that the acute increases in cytosolic superoxide induced by contractions are not derived from mitochondria. Data also indicate that, in muscle mitochondria, nitric oxide (NO) reduces the availability of superoxide, but no effect of NO on cytosolic superoxide availability was detected. To determine the relationship of changes in superoxide to hydrogen peroxide, an alternative specific approach was used where fibers were transduced using an adeno-associated viral vector to express the hydrogen peroxide probe, HyPer within the cytoplasmic compartment. HyPer fluorescence was significantly increased in fibers following contractions, but surprisingly followed a relatively slow time course that did not appear directly related to cytosolic superoxide. These data demonstrate for the first time temporal and site specific differences in specific ROS that occur in skeletal muscle fibers during and after contractile activity.

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  1. [4]Halliwell B, Gutteridge JMC (1989) Free radical biology and medicine. Oxford University Press.

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Authors
Pearson, T., Kabayo, T., Ng, R., Chamberlain, J., McArdle, A., & Jackson, M. J.
Affiliations
  • University of Liverpool (GB)
  • University of Washington (US)
Corresponding author
Jackson, Malcolm J.
Venue
PLoS ONE
Published
2014-05-29
Volume
9
Issue
5
Pages
e96378
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2132943675
Cited by
107
References
38
Citations by year
2026: 8 · 2025: 5 · 2024: 8 · 2023: 7 · 2022: 5 · 2021: 6 · 2020: 13 · 2019: 12 · 2018: 8 · 2017: 5 · 2016: 21 · 2015: 8 · 2014: 1
FWCI
11.33
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (5f32ar057651-02)
  • Medical Research Council (MR/K006312/1, G1002120)
  • National Institute on Aging (AG033610, R01AG033610)
  • National Institute of Neurological Disorders and Stroke
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (1F32AR057651, F32 AR057651, R01AR044533)
Topics
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
skeletal muscle contraction, reactive oxygen species, mitochondrial superoxide, hydrogen peroxide, nitric oxide, nitric oxide synthase, MitoSOX Red, dihydroethidium, adeno-associated virus vectors
MeSH terms
Animals, Hydrogen Peroxide, Male, Mitochondria, Muscle Contraction, Superoxides, Reactive Oxygen Species, Muscle, Skeletal, Muscle Fibers, Skeletal, Intracellular Space, Mice

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