Expression of insulin regulatable glucose transporters in skeletal muscle from Type 2 (non-insulin-dependent) diabetic patients |
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Authors: | A. Handberg A. Vaag P. Damsbo H. Beck-Nielsen J. Vinten |
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Affiliation: | (1) Institute of Medical Physiology B, Panum Institute, University of Copenhagen, Copenhagen;(2) Hvidøre Hospital, Diabetes Hospital, Klampenborg, Denmark;(3) Department of Endocrinology, University Hospital of Odense, Odense, Denmark |
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Abstract: | Summary A prominent feature of Type 2 (non-insulin-dependent) diabetes mellitus is the inability of insulin to appropiately increase the transport of glucose into target tissue. In adipocytes from individuals with Type 2 diabetes, insulin resistance has been shown to be associated with a depletion of glucose transporters. Similarly, streptozotocin induced diabetes causes a diminished expression of the insulin regulatable glucose transporter in rat adipocytes. The expression of this glucose transporter isoform has not yet been investigated in muscle tissue from patients with Type 2 diabetes. We have measured the content of the insulin regulatable glucose transporter in a vesicular fraction isolated from muscle biopsies from fasting individuals with Type 2 diabetes and control subjects, and we found that the number of the insulin regulatable glucose transporters expressed in skeletal muscle was unaffected by Type 2 diabetes (0.208 vs 0.205, arbitrary units, p>0.5, control subjects and diabetic patients). Thus, the decreased glucose disposal in Type 2 diabetes is not associated with a diminished number of insulin regulatable glucose transporters. |
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Keywords: | Type 2 (non-insulin-dependent) diabetes mellitus skeletal muscle glucose transporters insulin regulatable glucose transporters |
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