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Effect of thyroxine on basal and insulin-stimulated glucose uptake by fast and slow skeletal muscles of rats.
Authors:S Shoji
Institution:Department of Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
Abstract:1. The sc injection of 1-thyroxine (2 mg/kg bw/day) for 8 days produced a significant decrease of body weight gain in young male Wistar rats. 2. In these hyperthyroid rats there was a significant decrease in the wet weight of the extensor digitorum longus (EDL) and soleus (Sol) muscles as compared with those of control rats. 3. The basal glucose uptake by the EDL and Sol muscles was unchanged in hyperthyroid rats using the wet weight of muscle as a reference. 4. In hyperthyroid rats, the insulin-stimulated uptake of glucose by both the EDL and Sol muscles was significantly decreased. This inhibition was stronger in Sol and there was no insulin stimulation of glucose uptake by Sol.
Keywords:
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