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Soy protein ingestion results in less prolonged p70S6 kinase phosphorylation compared to whey protein after resistance exercise in older men

Mitchell, Cameron J., Della Gatta, Paul A., Petersen, Aaron C., Cameron-Smith, David and Markworth, James F. 2015, Soy protein ingestion results in less prolonged p70S6 kinase phosphorylation compared to whey protein after resistance exercise in older men, Journal of the international society of sports nutrition, vol. 12, no. 6, pp. 1-4, doi: 10.1186/s12970-015-0070-2.

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Title Soy protein ingestion results in less prolonged p70S6 kinase phosphorylation compared to whey protein after resistance exercise in older men
Author(s) Mitchell, Cameron J.
Della Gatta, Paul A.ORCID iD for Della Gatta, Paul A. orcid.org/0000-0003-2231-8370
Petersen, Aaron C.
Cameron-Smith, David
Markworth, James F.
Journal name Journal of the international society of sports nutrition
Volume number 12
Issue number 6
Start page 1
End page 4
Total pages 4
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2015
ISSN 1550-2783
Keyword(s) Aging
Anabolic signalling
Sarcopenia
Supplementation
Science & Technology
Life Sciences & Biomedicine
Nutrition & Dietetics
Sport Sciences
SKELETAL-MUSCLE STRENGTH
YOUNG MEN
MASS
MORTALITY
ISOLATE
REST
Summary BACKGROUND: The phosphorylation of p70S6 Kinase (p70S6K) is an important step in the initiation of protein translation. p70S6K phosphorylation is enhanced with graded intakes of whey protein after resistance exercise. Soy protein ingestion results in lower muscle protein synthesis after exercise compared with whey; however, the underlying mechanisms responsible for this difference have not been reported. FINDINGS: 13 older men (60-75) completed an acute bout of lower body resistance exercise and ingested 30 g of soy protein or carbohydrate. Muscle biopsies were obtained in the rested and fasted state and 2 and 4 hours post exercise. Phosphorylation status of p70S6K was measured with western blot. Results were compared with previously reported data from the ingestion of 30 g of whey protein or placebo. p70S6K phosphorylation was increased 2, but not 4 hours post exercise with soy protein ingestion. p70S6K phosphorylation was not increased post exercise with carbohydrate ingestion. CONCLUSIONS: Ingesting 30 g of either whey or soy protein resulted in equivalent p70S6K phosphorylation at 2 hours post exercise, however, unlike whey, soy protein failed to promote prolonged phosphorylation of p70S6K to 4 hours post-exercise.
Language eng
DOI 10.1186/s12970-015-0070-2
Field of Research 110601 Biomechanics
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2015, BioMed Central
Persistent URL http://hdl.handle.net/10536/DRO/DU:30075142

Document type: Journal Article
Collections: School of Exercise and Nutrition Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.