Cited by 43Muscle metabolism and nutritionMuscle Physiology and DisordersNutrition and Health in Aging

Effects of energy deficit, dietary protein, and feeding on intracellular regulators of skeletal muscle proteolysis

Carbone, John W., Margolis, Lee M., McClung, James P., Cao, Jay J., Murphy, Nancy E., Sauter, Edward R., Combs, Gerald F., Young, Andrew J. +1 more·2013·The FASEB Journal

Abstract

This study was undertaken to characterize the ubiquitin proteasome system (UPS) response to varied dietary protein intake, energy deficit (ED), and consumption of a mixed meal. A randomized, controlled trial of 39 adults consuming protein at 0.8 (recommended dietary allowance [RDA]), 1.6 (2×‐RDA), or 2.4 (3×‐RDA) g · kg –1 ·· d –1 for 31 d. A 10‐d weight maintenance (WM) period was followed by 21 d of 40% ED. Ubiquitin (Ub)‐mediated proteolysis and associated gene expression were assessed in the postabsorptive (fasted) and postprandial (fed; 480 kcal, 20 g protein) states after WM and ED by using muscle biopsies, fluorescence‐based assays, immunoblot analysis, and real‐time qRT‐PCR In the assessment of UPS responses to varied protein intakes, ED, and feeding, the RDA, WM, and fasted measures served as appropriate controls. ED resulted in the up‐regulation of UPS‐associated gene expression, as mRNA expression of the atrogenes muscle RING finger‐1 (MuRF1) and atrogin‐1 were 1.2‐ and 1.3‐fold higher ( P <0.05) for ED than for WM. However, mixed‐meal consumption attenuated UPS‐mediated proteolysis, independent of energy status or dietary protein, as the activities of the 26S proteasome subunits β1, β2, and β5 were lower ( P <0.05) for fed than for fasted. Muscle protein ubiquitylation was also 45% lower ( P <0.05) for fed than for fasted, regardless of dietary protein and energy manipulations. Independent of habitual protein intake and despite increased MuRF1 and atrogin‐1 mRNA expression during ED, consuming a protein‐containing mixed meal attenuates Ub‐mediated proteolysis.—Carbone, J. W., Margolis, L. M., McClung, J. P., Cao, J. J., Murphy, N. E., Sauter, E. R., Combs, G. F., Jr., Young, A. J., Pasiakos, S. M., Effects of energy deficit, dietary protein, and feeding on intracellular regulators of skeletal muscle proteolysis. FASEB J. 27, 5104–5111 (2013). www.fasebj.org

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Crossref · 10.1096/fj.13-239228

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Authors
Carbone, J. W., Margolis, L. M., McClung, J. P., Cao, J. J., Murphy, N. E., Sauter, E. R., Combs, G. F., Young, A. J., & Pasiakos, S. M.
Affiliations
  • Eastern Michigan University (US)
  • U.S. Army Research Institute of Environmental Medicine (US)
  • Agricultural Research Service (US)
Venue
The FASEB Journal
Publisher
Wiley
Published
2013-08-21
Volume
27
Issue
12
Pages
5104-5111
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2142038460
Cited by
43
References
38
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 4 · 2022: 1 · 2021: 4 · 2020: 2 · 2019: 5 · 2018: 4 · 2017: 4 · 2016: 1 · 2015: 2 · 2014: 11 · 2013: 1
FWCI
2.90
Type
journal article
Language
en
Open access
closed
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Medical Research and Materiel Command
  • U.S. Department of Agriculture
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 › Physiology › Nutrition and Health in Aging
Keywords
skeletal muscle proteolysis, ubiquitin-proteasome system, negative energy balance, protein intake, mixed meal, muscle atrophy, MuRF1, atrogin-1, 26S proteasome, postprandial state, fasting, weight maintenance
MeSH terms
Adolescent, Adult, Body Weight, Dietary Proteins, Fasting, Female, Humans, Male, Muscle Proteins, Transcription, Genetic, Muscle, Skeletal, Ubiquitin, Caloric Restriction, SKP Cullin F-Box Protein Ligases, Proteasome Endopeptidase Complex, Ubiquitination, Proteolysis, Polycomb Repressive Complex 1, Recommended Dietary Allowances

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