Cited by 33Muscle metabolism and nutritionMuscle Physiology and DisordersNutrition and Health in Aging

Oral L-Glutamine Pretreatment Attenuates Skeletal Muscle Atrophy Induced by 24-h Fasting in Mice

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de Vasconcelos, Diogo Antonio Alves, Giesbertz, Pieter, de Souza, Diego Ribeiro, Vitzel, Kaio Fernando, Abreu, Phablo, Marzuca-Nassr, Gabriel Nasri, Fortes, Marco Aurélio Salomão, Murata, Gilson Masahiro +4 more·2019·The Journal of Nutritional Biochemistry

Abstract

L-Glutamine (L-Gln) supplementation has been pointed out as an anticatabolic intervention, but its effects on protein synthesis and degradation signaling in skeketal muscle are still poorly known. The effects of L-Gln pretreatment (1 g kg-1 day-1 body weight for 10 days) on muscle fiber cross-sectional area (CSA), amino acid composition (measured by LC-MS/MS) and protein synthesis (Akt-mTOR) and degradation (ubiquitin ligases) signaling in soleus and extensor digitorum longus (EDL) muscles in 24-h-fasted mice were investigated. The fiber CSA of EDL muscle was not different between the L-Gln-fasted and L-Gln-fed groups. This finding was associated with reduced contents of L-Leu and L-Iso and activation of protein synthesis signaling (p-RPS6 Ser240/244 and Akt-mTOR). The spectrum of soleus muscle fiber CSA distribution was larger in L-Gln-fasted as compared with placebo-fasted mice. This effect of L-Gln pretreatment was associated with changes in red fibers L-Gln metabolism as indicated by increased intracellular L-glutamine/L-glutamate ratio, L-aspartate and GABA levels. L-Gln supplementation reduced fasting-induced mass loss in tibialis anterior and gastrocnemius muscles. Evidence is presented that pretreatment with L-glutamine attenuates skeletal muscle atrophy induced by 24-h fasting through mechanisms that vary with the muscle fiber type.

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Crossref · 10.1016/j.jnutbio.2019.05.010

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Authors
de Vasconcelos, D. A. A., Giesbertz, P., de Souza, D. R., Vitzel, K. F., Abreu, P., Marzuca-Nassr, G. N., Fortes, M. A. S., Murata, G. M., Hirabara, S. M., Curi, R., Daniel, H., & Pithon-Curi, T. C.
Affiliations
  • Technical University of Munich (DE)
  • Universidade de São Paulo (BR)
  • Universidad de La Frontera (CL)
  • Universidade Cruzeiro do Sul (BR)
Venue
The Journal of Nutritional Biochemistry
Publisher
Elsevier BV
Published
2019-08
Volume
70
Pages
202-214
ISSN
0955-2863 (ISSN-L)
OpenAlex
W2945776887
Cited by
33
References
72
Citations by year
2026: 1 · 2025: 5 · 2024: 2 · 2023: 9 · 2022: 5 · 2021: 6 · 2020: 3 · 2019: 2
FWCI
2.12
Type
journal article
Language
en
Open access
Locations
  • The Journal of Nutritional Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
  • Omeka S (Universidad de La Frontera) (submittedVersion, cc-by-nc-nd)
Funders
Conselho Nacional de Desenvolvimento Científico e Tecnológico
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
glutamine, skeletal muscle atrophy, fasting, muscle protein synthesis, Akt/mTOR signaling, ubiquitin ligase, muscle fiber cross-sectional area, muscle fiber type, soleus muscle, extensor digitorum longus, amino acid composition, S6 phosphorylation, glutamine metabolism, muscle mass loss
MeSH terms
Adipose Tissue, Administration, Oral, Animals, Fasting, gamma-Aminobutyric Acid, Glutamine, Male, Mice, Inbred C57BL, Muscular Atrophy, Signal Transduction, Muscle, Skeletal, Cell Cycle Proteins, Ribosomal Protein S6, Adaptor Proteins, Signal Transducing, Mice

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