jamnick-highintensity-2021.pdf (2.2 MB)
High-intensity training induces non-stoichiometric changes in the mitochondrial proteome of human skeletal muscle without reorganisation of respiratory chain content
journal contribution
posted on 2021-01-01, 00:00 authored by C Granata, N J Caruana, J Botella, Nicholas Jamnick, K Huynh, J Kuang, H A Janssen, B Reljic, N A Mellett, A Laskowski, T L Stait, A E Frazier, M T Coughlan, P J Meikle, D R Thorburn, D A Stroud, D J BishopAbstractMitochondrial defects are implicated in multiple diseases and aging. Exercise training is an accessible, inexpensive therapeutic intervention that can improve mitochondrial bioenergetics and quality of life. By combining multiple omics techniques with biochemical and in silico normalisation, we removed the bias arising from the training-induced increase in mitochondrial content to unearth an intricate and previously undemonstrated network of differentially prioritised mitochondrial adaptations. We show that changes in hundreds of transcripts, proteins, and lipids are not stoichiometrically linked to the overall increase in mitochondrial content. Our findings suggest enhancing electron flow to oxidative phosphorylation (OXPHOS) is more important to improve ATP generation than increasing the abundance of the OXPHOS machinery, and do not support the hypothesis that training-induced supercomplex formation enhances mitochondrial bioenergetics. Our study provides an analytical approach allowing unbiased and in-depth investigations of training-induced mitochondrial adaptations, challenging our current understanding, and calling for careful reinterpretation of previous findings.
History
Journal
Nature CommunicationsVolume
12Issue
1Article number
ARTN 7056Pagination
1 - 18Publisher
SpringerLocation
Berlin, GermanyPublisher DOI
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ISSN
2041-1723eISSN
2041-1723Language
EnglishPublication classification
C1 Refereed article in a scholarly journalUsage metrics
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