Abstract
Studies with brain alanine aminotransferase showed higher activity of the enzyme in the soluble fraction of cerebellum. Among the tissues, the liver soluble fraction was the richest source of the enzyme. Alloxan-induced diabetes caused both regional and time-dependent variations in the activity of brain alanine aminotransferase. Significant among these changes were the decrease in both soluble and particulate enzyme from cerebral hemispheres and an increase in the soluble enzyme activity from cerebellum at early stages of diabetes. Brain stem did not show any marked change in enzyme activity. Liver and heart enzyme, however, increased significantly after 1-2 weeks of diabetes. Insulin treatment to diabetic animals caused an 'over-shoot' in soluble alanine aminotransferase activity, particularly in cerebellum and liver.
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