Cited by 33Genetics and Physical PerformanceAdipose Tissue and MetabolismCardiovascular and exercise physiology

The Single Nucleotide Polymorphism Gly482Ser in the PGC-1α Gene Impairs Exercise-Induced Slow-Twitch Muscle Fibre Transformation in Humans

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Steinbacher, Peter, Feichtinger, René G., Kedenko, Lyudmyla, Kedenko, Igor, Reinhardt, Sandra, Schönauer, Anna-Lena, Leitner, Isabella, Sänger, Alexandra M. +5 more·2015·PLOS ONE

Abstract

PGC-1α (peroxisome proliferator-activated receptor γ co-activator 1α) is an important regulator of mitochondrial biogenesis and a master regulator of enzymes involved in oxidative phosphorylation. Recent evidence demonstrated that the Gly482Ser single nucleotide polymorphism (SNP) in the PGC-1α gene affects insulin sensitivity, blood lipid metabolism and binding to myocyte enhancer factor 2 (MEF2). Individuals carrying this SNP were shown to have a reduced cardiorespiratory fitness and a higher risk to develop type 2 diabetes. Here, we investigated the responses of untrained men with the Gly482Ser SNP to a 10 week programme of endurance training (cycling, 3 x 60 min/week, heart rate at 70-90% VO2peak). Quantitative data from analysis of biopsies from vastus lateralis muscle revealed that the SNP group, in contrast to the control group, lacked a training-induced increase in content of slow contracting oxidative fibres. Capillary supply, mitochondrial density, mitochondrial enzyme activities and intramyocellular lipid content increased similarly in both groups. These results indicate that the impaired binding of MEF2 to PGC-1α in humans with this SNP impedes exercise-induced fast-to-slow muscle fibre transformation.

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  1. [54]Srere PA. Citrate synthase. Methods Enzymol. 1969; 13: 3– 11.

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Authors
Steinbacher, P., Feichtinger, R. G., Kedenko, L., Kedenko, I., Reinhardt, S., Schönauer, A.-L., Leitner, I., Sänger, A. M., Stoiber, W., Kofler, B., Förster, H., Paulweber, B., & Ring-Dimitriou, S.
Affiliations
  • University of Salzburg (AT)
  • Paracelsus Medical University (AT)
Corresponding author
Steinbacher, Peter
Venue
PLOS ONE
Published
2015-04-17
Volume
10
Issue
4
Pages
e0123881
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2077084368
Cited by
33
References
92
Citations by year
2026: 4 · 2025: 3 · 2024: 2 · 2023: 2 · 2022: 4 · 2021: 1 · 2020: 3 · 2019: 6 · 2018: 1 · 2017: 2 · 2016: 4 · 2015: 1
FWCI
1.82
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Oesterreichische Nationalbank
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Physical Performance
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
PGC-1α, slow-twitch muscle fibres, endurance training, vastus lateralis, mitochondrial biogenesis, oxidative phosphorylation, MEF2, intramyocellular lipid, capillary supply, mitochondrial enzyme activity
MeSH terms
Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, Adult, Humans, Male, Physical Endurance, Transcription Factors, Exercise, Muscle, Skeletal, Muscle Fibers, Slow-Twitch, Polymorphism, Single Nucleotide, MEF2 Transcription Factors

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