Cited by 35Muscle metabolism and nutritionMuscle Physiology and DisordersExercise and Physiological Responses

Effects of pre-exercise feeding on serum hormone concentrations and biomarkers of myostatin and ubiquitin proteasome pathway activity

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Dalbo, Vincent J., Roberts, Michael D., Hassell, Scott, Kerksick, Chad M.·2013·European Journal of Nutrition

Abstract

Purpose The aim of the study was to examine the acute effects of pre-exercise ingestion of protein, carbohydrate, and a non-caloric placebo on serum concentrations of insulin and cortisol, and the intramuscular gene expression of myostatin- and ubiquitin proteasome pathway (UPP)-related genes following a bout of resistance exercise. Methods Ten untrained college-aged men participated in three resistance exercise sessions (3 × 10 at 80 % 1RM for bilateral hack squat, leg press, and leg extension) in a cross-over fashion, which were randomly preceded by protein, carbohydrate, or placebo ingestion 30 min prior to training. Pre-supplement/pre-exercise, 2 h and 6 h post-exercise muscle biopsies were obtained during each session and analyzed for mRNA fold changes in myostatin (MSTN), activin IIB, follistatin-like 3 (FSTL3), SMAD specific E3 ubiquitin protein ligase 1 (SMURF1), forkhead box O3, F-box protein 32 (FBXO32), and Muscle RING-finger protein-1, with beta-actin serving as the housekeeping gene. Gene expression of all genes was analyzed using real-time PCR. Results Acute feeding appeared to have no significant effect on myostatin or UPP biomarkers. However, resistance exercise resulted in a significant downregulation of MSTN and FBXO32 mRNA expression and a significant upregulation in FSTL3 and SMURF1 mRNA expression (p Conclusions An acute bout of resistance exercise results in acute post-exercise alterations in intramuscular mRNA expression of myostatin and UPP markers sug…

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Authors
Dalbo, V. J., Roberts, M. D., Hassell, S., & Kerksick, C. M.
Affiliations
  • Central Queensland University (AU)
  • University of Missouri (US)
  • University of Oklahoma (US)
Corresponding author
Dalbo, Vincent J.
Venue
European Journal of Nutrition
Published
2012-04-05
Volume
52
Issue
2
Pages
477-487
ISSN
  • 1436-6207 (ISSN-L)
  • 1436-6215
OpenAlex
W2081092205
Cited by
35
References
55
Citations by year
2026: 2 · 2025: 1 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 4
FWCI
1.36
Type
journal article
Language
en
Open access
Locations
  • European Journal of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • Acquire (CQUniversity) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
pre-exercise feeding, resistance training, myostatin, ubiquitin-proteasome system, skeletal muscle gene expression, protein intake, carbohydrate intake, insulin, cortisol, FSTL3, Smurf1, atrogin-1, muscle growth
MeSH terms
Tripartite Motif Proteins, Forkhead Box Protein O3, Actins, Dietary Carbohydrates, Dietary Proteins, Eating, Humans, Hydrocortisone, Insulin, Male, Muscle Proteins, RNA, Messenger, Biomarkers, Down-Regulation, Up-Regulation, Single-Blind Method, Muscle, Skeletal, Cross-Over Studies, Follistatin-Related Proteins, Ubiquitin-Protein Ligases, SKP Cullin F-Box Protein Ligases, Forkhead Transcription Factors, Resistance Training, Myostatin, Young Adult, Real-Time Polymerase Chain Reaction

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