Biochemical changes in lipid and carbohydrate metabolism in obese diabetic male albino rats

The effect of high fat diet on lipid and carbohydrate metabolic changes was studied in mature male albino rats. The animals were rendered obese by feeding a high fat diet for 60 days. Half of obese rats were become diabetic by injecting with a reduced dose of alloxan; to produce a non insulin dependent diabetes mellitus state. These obese models of non di- abetic and diabetic rats were compared with normal male rats kept on a basal diet for 60 days. The fat fed rats beside gaining weight showed a significant rise in their hepatic lipid contents and observed an insulin resistant state. Lipid profile of the omental adipose tissue exhibited a significantly higher total lipid content, but lower total cholesterol, triglycerides and phospholipids contents in both obese (non diabetic and diabetic) as compared with the normal rats. On the other hand, the brown adipose tissue showed a reduced fat catabolism with a significant rise in its phospholipid contents. Correlation be- tween plasma atherogenic index and plasma fatty acids pattern showed that in the obese diabetic rats atherogenic index was positively correlated with total polyunsaturated fatty acids, while significantly negative correlation with total saturated fatty acids. This work showed that high fat substrates have been got remarkable impacts on rats body weight and metabolism.