Diabetes and Glut4

Reading through wikipedia's page on diabetes mellitus raised the question for me about whether glut 4 levels in the cells of the body correlate in any way with insulin resistance.
http://en.wikipedia.org/wiki/Diabetes_mellitus. Other posts on this blog have described a potential pathway for glut 4 to mediate insulin sensitivity and glucose uptake within cells. Lot's of the articles I 'm reading at the moment also lend weight to the concept that glut4 is related in some way to diabetes.

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