Title : Glucosamine-induced endoplasmic reticulum stress affects GLUT4 expression via activating transcription factor 6 in rat and human skeletal muscle cells.

Pub. Date : 2010 May

PMID : 20165829






6 Functional Relationships(s)
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1 AIMS/HYPOTHESIS: Glucosamine, generated during hyperglycaemia, causes insulin resistance in different cells. Glucosamine insulin Homo sapiens
2 Here we sought to evaluate the possible role of endoplasmic reticulum (ER) stress in the induction of insulin resistance by glucosamine in skeletal muscle cells. Glucosamine insulin Homo sapiens
3 In addition, glucosamine impaired insulin-stimulated 2-DG uptake in both rat and human myotubes. Glucosamine insulin Homo sapiens
4 Interestingly, pretreatment of both rat and human myotubes with the chemical chaperones 4-phenylbutyric acid (PBA) or tauroursodeoxycholic acid (TUDCA), completely prevented the effect of glucosamine on both ER stress induction and insulin-induced glucose uptake. Glucosamine insulin Homo sapiens
5 CONCLUSIONS/INTERPRETATION: In this work we show that glucosamine-induced ER stress causes insulin resistance in both human and rat myotubes and impairs GLUT4 production and insulin-induced glucose uptake via an ATF6-dependent decrease of the GLUT4 regulators MEF2A and PGC1alpha. Glucosamine insulin Homo sapiens
6 CONCLUSIONS/INTERPRETATION: In this work we show that glucosamine-induced ER stress causes insulin resistance in both human and rat myotubes and impairs GLUT4 production and insulin-induced glucose uptake via an ATF6-dependent decrease of the GLUT4 regulators MEF2A and PGC1alpha. Glucosamine insulin Homo sapiens