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© Research
Publication : Bioscience reports

Ready, set, internalize: mechanisms and regulation of GLUT4 endocytosis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Bioscience reports - 01 Feb 2009

Antonescu CN, Foti M, Sauvonnet N, Klip A

Link to Pubmed [PMID] – 19143591

Biosci. Rep. 2009 Feb;29(1):1-11

The facilitative glucose transporter GLUT4, a recycling membrane protein, is required for dietary glucose uptake into muscle and fat cells. GLUT4 is also responsible for the increased glucose uptake by myofibres during muscle contraction. Defects in GLUT4 membrane traffic contribute to loss of insulin-stimulated glucose uptake in insulin resistance and Type 2 diabetes. Numerous studies have analysed the intracellular membrane compartments occupied by GLUT4 and the mechanisms by which insulin regulates GLUT4 exocytosis. However, until recently, GLUT4 internalization was less well understood. In the present paper, we review: (i) evidence supporting the co-existence of clathrin-dependent and independent GLUT4 internalization in adipocytes and muscle cells; (ii) the contrasting regulation of GLUT4 internalization by insulin in these cells; and (iii) evidence suggesting regulation of GLUT4 endocytosis in muscle cells by signals associated with muscle contraction.

http://www.ncbi.nlm.nih.gov/pubmed/19143591