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Activities of liver pyruvate dehydrogenase complex and 3-hydroxyacyl-CoA dehydrogenase in sand rat (Psammomys obesus).

Authors
Type
Published Article
Journal
Life Sciences
0024-3205
Publisher
Elsevier
Publication Date
Volume
60
Issue
1
Pages
51–55
Identifiers
PMID: 8995532
Source
Medline

Abstract

The sand rat (Psammomys obesus) is an animal model for non-insulin dependent diabetes mellitus, which is induced by a regular chow diet. The total activity of liver pyruvate dehydrogenase complex in the sand rats under normoglycemic and normoinsulinemic conditions was one half as high as that in the albino rats, but the activity of liver 3-hydroxyacyl-CoA dehydrogenase was more than 4 times greater in the former than in the latter, suggesting a low capacity for glucose oxidation and a high capacity for fatty acid oxidation in the sand rats. These metabolic conditions may be related to the predisposition of the animals towards diabetes. Diet-induced diabetes in the sand rats resulted in decreasing the active form of liver pyruvate dehydrogenase complex and in increasing the activity of liver 3-hydroxyacyl-CoA dehydrogenase, suggesting that the diabetic conditions further suppress glucose oxidation and promote fatty acid oxidation.

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