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[Influence of ursodeoxycholic acid on the therapeutic effects of low-calorie diet in obesity and hyperlipidemia rats with steatohepatitis].

OBJECTIVE
To explore the influence of ursodeoxycholic acid on the therapeutic effects of low-calorie diet in steatohepatitis with obesity and hyperlipidemia.


METHODS
Thirty-five Sprague-Dawley rats fed with high-fat diet for 10 weeks were randomly allocated into 3 groups, and continued to experiment for 2 weeks. The animals in model group (n = 10) were still fed with high-fat diet; low-calorie diet group (n = 10) with common diet but only one third of the amount of normal demand; ursodeoxycholic acid group (n = 15) with low-calorie diet and ursodeoxycholic acid (15 mg/kg.d(-1)); and another 9 rats with common diet for 12 weeks as normal group.


RESULTS
Compared with normal group, such indexes as body weight, liver weight, and the level of serum lipids and aminotransferase were all increased significantly in model group. Furthermore, all rats in model group developed steatohepatitis. On the other hand, such indexes as body weight and the degree of steatosis in rats of low-calorie diet group were decreased sharply compared with those in model group, but neither disorders of serum lipid nor the degree of hepatic inflammation and necrosis in low-calorie diet group were improved obviously. Disorders of serum lipid, aspartate aminotransferase, hepatic inflammation and necrosis in ursodeoxycholic acid group were ameliorated to some extent.


CONCLUSIONS
Ursodeoxycholic acid might help to improve the therapeutic effects of low-calorie diet on steatohepatitis with obesity and hyperlipidemia.