Document Detail


Regulation of skeletal muscle proteolysis by amino acids.
MedLine Citation:
PMID:  15648001     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Skeletal muscle is the major reservoir of body protein that can be mobilized in a number of muscle wasting conditions, that include kidney failure. Increased proteolysis in such conditions provides free amino acids that are used for acute-phase protein synthesis or that are degraded for energy purposes. Amino acids act as signals to regulate both protein synthesis and protein breakdown. We review the current but limited information available on the regulation of proteolytic systems in muscle cells. In particular, recent data have shown that amino acid deprivation in C2C12 myotubes stimulates autophagic sequestration by mechanisms that implicate the Apg system through a class III phosphoinositide-3'-kinase (PI3K III ) signaling cascade.
Authors:
Daniel Béchet; Amina Tassa; Lydie Combaret; Daniel Taillandier; Didier Attaix
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation     Volume:  15     ISSN:  1532-8503     ISO Abbreviation:  J Ren Nutr     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-01-13     Completed Date:  2006-08-18     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9112938     Medline TA:  J Ren Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  18-22     Citation Subset:  IM    
Affiliation:
Human Nutrition Research Center of Clermont-Ferrand, Nutrition and Protein Metabolism Unit, INRA de Theix, Ceyrat, France.
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MeSH Terms
Descriptor/Qualifier:
1-Phosphatidylinositol 3-Kinase / metabolism
Amino Acids / deficiency,  physiology*
Animals
Autophagy
Calpain / metabolism
Caspases / metabolism
Homeostasis
Humans
Lysosomes / enzymology
Matrix Metalloproteinase 2 / metabolism
Muscle Fibers, Skeletal / enzymology
Muscle Proteins / metabolism*
Muscle, Skeletal / enzymology*
Proteasome Endopeptidase Complex / metabolism
Signal Transduction
Ubiquitin / metabolism
Chemical
Reg. No./Substance:
0/Amino Acids; 0/Muscle Proteins; 0/Ubiquitin; EC 2.7.1.137/1-Phosphatidylinositol 3-Kinase; EC 3.4.22.-/Calpain; EC 3.4.22.-/Caspases; EC 3.4.24.24/Matrix Metalloproteinase 2; EC 3.4.25.1/Proteasome Endopeptidase Complex

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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