Title
Supplementation of Specific Collagen Peptides Following High-Load Resistance Exercise Upregulates Gene Expression in Pathways Involved in Skeletal Muscle Signal Transduction
Author
Christoph Centner
Department of Sport and Sport Science, University of Freiburg
Author
Simon Jerger
Department of Sport and Sport Science, University of Freiburg
Author
Alistair Mallard
Australasian Kidney Trials Network, Centre for Health Services Research, Faculty of Medicine, University of Queensland
... show all
Abstract
Previous evidence suggests that resistance training in combination with specific collagen peptides (CP) improves adaptive responses of the muscular apparatus. Although beneficial effects have been repeatedly demonstrated, the underlying mechanisms are not well understood. Therefore, the primary objective of the present randomized trial was to elucidate differences in gene expression pathways related to skeletal muscle signal transduction following acute high-load resistance exercise with and without CP intake. Recreationally active male participants were equally randomized to high-load leg extension exercise in combination with 15 g CP or placebo (PLA) supplementation. Muscle biopsies from the vastus lateralis muscle were obtained at baseline as well as 1, 4 and 24 h post exercise to investigate gene expression using next generation sequencing analysis. Several important anabolic pathways including PI3K-Akt and MAPK pathways were significantly upregulated at 1 and 4 h post-exercise. Significant between-group differences for both pathways were identified at the 4 h time point demonstrating a more pronounced effect after CP intake. Gene expression related to the mTOR pathway demonstrated a higher visual increase in the CP group compared to PLA by trend, but failed to achieve statistically significant group differences. The current findings revealed a significantly higher upregulation of key anabolic pathways (PI3K-Akt, MAPK) in human skeletal muscle 4 h following an acute resistance training combined with intake of 15 g of specific collagen peptides compared to placebo. Further investigations should examine potential relationships between upregulated gene expression and changes in myofibrillar protein synthesis as well as potential long-term effects on anabolic pathways on the protein level.
Keywords
gene expressionpathway analysiscollagen peptidesresistance exerciseKEGG enrichment analysis
Object type
Language
English [eng]
Persistent identifier
https://phaidra.univie.ac.at/o:1681622
Appeared in
Title
Frontiers in Physiology
Volume
13
ISSN
1664-042X
Issued
2022
Publisher
Frontiers Media SA
Date issued
2022
Access rights
Rights statement
© 2022 Centner, Jerger, Mallard, Herrmann, Varfolomeeva, Gollhofer, Oesser, Sticht, Gretz, Aagaard, Nielsen, Frandsen, Suetta, Gollhofer and König
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