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The aim is to investigate defects in glucose transporters in skeletal muscle of diabetic models and the impact of glucose and insulin levels.

Effects of hyperglycemia on glucose transporters of the muscle

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The aim is to investigate defects in glucose transporters in skeletal muscle of diabetic models and the impact of glucose and insulin levels.
Analyzed glucose transporters in diabetic animal models using subcellular fractionation and Western blotting.
Measured changes in insulin-dependent glucose transporters GLUT1 and GLUT4 in plasma and internal membranes.
Restored normal glucose levels via phlorizin injections to evaluate effects on transporter levels.
In diabetic rats, GLUT4 in plasma membranes decreased while GLUT1 increased, showing a 1.5:1 ratio.
After normalizing glucose levels, GLUT4 and GLUT1 levels in plasma membranes returned to normal.
GLUT4 levels in internal membranes partially recovered, indicating that GLUT4 decrease might be a protective mechanism.

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Review explores glucose transporter defects in diabetic muscle, highlighting hyperglycemia's role.

Dimitrakoudis et al. (1992) studied this question.

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