Authors: M Collison D J James D Graham G D Holman J M C Connell A F Dominiczak G W Gould I P Salt
Publish Date: 2005/02/24
Volume: 48, Issue: 3, Pages: 539-546
Abstract
Treatment of isolated adipocytes with insulin resulted in trafficking of GLUT4 to the plasma membrane There was no significant difference in the magnitude of insulinstimulated GLUT4 trafficking from intracellular membranes to the plasma membrane between strains In contrast we demonstrated that there is a significant reduction in GLUT4 accessible to the glucose photolabel BioLCATBBGPA at the plasma membrane of SHRSP adipocytes compared with control ratsWe propose that a large proportion of GLUT4 translocated to the plasma membrane in response to insulin is not able to bind substrate and catalyse transport in the SHRSP Therefore there is a reduction in bioavailable GLUT4 in SHRSP animals that is likely to account at least in part for the reduced insulinstimulated glucose uptake
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