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MitoQ and CoQ10 supplementation mildly suppresses skeletal muscle mitochondrial hydrogen peroxide levels without impacting mitochondrial function in middle-aged men

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Abstract

Purpose

Excess production of reactive oxygen species (ROS) from the mitochondria can promote mitochondrial dysfunction and has been implicated in the development of a range of chronic diseases. As such there is interest in whether mitochondrial-targeted antioxidant supplementation can attenuate mitochondrial-associated oxidative stress. We investigated the effect of MitoQ and CoQ10 supplementation on oxidative stress and skeletal muscle mitochondrial ROS levels and function in healthy middle-aged men.

Methods

Skeletal muscle and blood samples were collected from twenty men (50 ± 1 y) before and following six weeks of daily supplementation with MitoQ (20 mg) or CoQ10 (200 mg). High-resolution respirometry was used to determine mitochondrial respiration and H2O2 levels, markers of mitochondrial mass and antioxidant defences were measured in muscle samples and oxidative stress markers in urine and blood samples.

Results

Both MitoQ and CoQ10 supplementation suppressed mitochondrial net H2O2 levels during leak respiration, while MitoQ also elevated muscle catalase expression. However, neither supplement altered urine F2-isoprostanes nor plasma TBARS levels. Neither MitoQ nor CoQ10 supplementation had a significant impact on mitochondrial respiration or mitochondrial density markers (citrate synthase, mtDNA/nDNA, PPARGC1A, OXPHOS expression).

Conclusion

Our results suggest that neither MitoQ and CoQ10 supplements impact mitochondrial function, but both can mildly suppress mitochondrial ROS levels in healthy middle-aged men, with some indication that MitoQ may be more effective than CoQ10.

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Abbreviations

BCA:

Bicinchoninic acid assay

CI-IV:

Complex 1–4

CAT:

Catalase

CoQ10:

Coenzyme Q10

CCO:

Cytochrome C oxidase

CS:

Citrate synthase

GAPDH:

Glyceraldehyde 3-phosphate dehydrogenase

H2O2 :

Hydrogen peroxide

LSD:

Fisher's least significant difference

MES:

2-(N-morpholino)ethanesulfonic acid

OXPHOS:

Oxidative phosphorylation

O2 :

Oxygen

RIPA:

Radioimmunoprecipitation assay buffer

ROS:

Reactive oxygen species

SDS-PAGE:

Sodium dodecyl sulphate–polyacrylamide gel electrophoresis

SOD:

Superoxide dismutase

TBARS:

Thiobarbituric acid-reactive substances

TPP+ :

Triphenylphosphonium

References

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Acknowledgements

We are thankful to all participants for their contribution to the study. We would like to acknowledge Dr’s Karina McKearney, Jacob Rollo and Ryan Yeu for their practical assistance in the biopsy procedure. We also appreciate Shannon Adams for her technical support. TLM is supported by a Rutherford Discovery Fellowship.

Funding

This study was financially supported by MitoQ®. MitoQ® had no role interpretation of findings, data analysis, or manuscript preparation. The authors have no affiliation with MitoQ® and were given full rights to publish all findings without approval from MitoQ®.

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Authors and Affiliations

Authors

Contributions

TLM, CJM and AJRH conceived and designed the study. TLM, CJM, TP, CLM, RFD, SCB, RN, WW, TAM, AH performed the experiments and TP, TLM, CJM, AJRH analysed the data. TP, TLM, CJM and AJRH co-wrote the manuscript, and all authors approved the final manuscript version.

Corresponding author

Correspondence to Troy L. Merry.

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Conflict of interest

All authors declare no competing interests.

Additional information

Communicated by Michalis G Nikolaidis.

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421_2020_4396_MOESM1_ESM.pptx

Supplementary file1 Supplementary figure 1. Quantification of mitochondrial oxidative phosphorylation complexes from western blots shown in figure 4B. (PPTX 167 kb)

Supplementary file2 (DOCX 19 kb)

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Pham, T., MacRae, C.L., Broome, S.C. et al. MitoQ and CoQ10 supplementation mildly suppresses skeletal muscle mitochondrial hydrogen peroxide levels without impacting mitochondrial function in middle-aged men. Eur J Appl Physiol 120, 1657–1669 (2020). https://doi.org/10.1007/s00421-020-04396-4

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  • DOI: https://doi.org/10.1007/s00421-020-04396-4

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