Fibre-type specificity and effect of thyroid hormone on glucose 6-phosphate dehydrogenase activity in normal and denervated skeletal muscles of the rat
Journal Title: | The Histochemical journal 1985-01-01, Vol.17 (6), p.699-706 |
Main Author: | Max, S. R. |
Other Authors: | Hall-Craggs, E. C. B. , Chacon, M. |
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English |
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Publisher: | Legacy CDMS: Kluwer |
ID: | ISSN: 0018-2214 |
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recordid: | cdi_crossref_primary_10_1007_BF01003521 |
title: | Fibre-type specificity and effect of thyroid hormone on glucose 6-phosphate dehydrogenase activity in normal and denervated skeletal muscles of the rat |
format: | Article |
creator: |
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ispartof: | The Histochemical journal, 1985-01-01, Vol.17 (6), p.699-706 |
description: | Glucose-6-phosphate dehydrogenase activity increases following denervation of rat skeletal muscle. The specificity of this effect to muscle fibre type was studied. Basal activity of the dehydrogenase was higher in soleus, a muscle composed predominantly of type I fibres, than in extensor digitorum longus, a muscle composed predominantly of type IIa and b fibres. The enzymatic activity of the soleus was also greater than that of the red (RQ) and white (WQ) portions of quadriceps muscle (predominantly type IIa and type IIb fibres, respectively). Following denervation, glucose-6-phosphate dehydrogenase increased in extensor digitorum longus and RQ, but not in WQ or the soleus. Following chronic treatment of rats with 3,3',5-triiodothyronine, which converts type I muscle fibres to type II, the dehydrogenase activity increased in both denervated soleus and extensor digitorum longus. It is concluded that the effect of denervation on glucose-6-phosphate dehydrogenase activity is selective for type IIa (fast oxidative-glycolytic) muscle fibres. |
language: | eng |
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identifier: | ISSN: 0018-2214 |
fulltext: | no_fulltext |
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