Interferon alpha induces disorder of lipid metabolism by lowering postheparin lipases and cholesteryl ester transfer protein activities in patients with chronic hepatitis C

Hepatology : Official Journal of the American Association for the Study of Liver Diseases
E ShinoharaY Matsuzawa

Abstract

The effect of recombinant interferon alpha 2a (rIFN-alpha2a) on serum lipoprotein metabolism was assessed in 39 patients with chronic viral hepatitis C. rIFN-alpha2a was administered intramuscularly at a dose of 9 x 10(6) U/d for 2 weeks and then for 3 times a week over 6 months. The serum cholesterol concentration significantly decreased one week after rIFN-alpha2a administration. Approximately 67% of this decrease was attributed to the reduction of high-density lipoprotein (HDL)-cholesterol; a decrease in HDL2-cholesterol was more evident. By contrast, serum triglyceride levels, largely derived from very-low density lipoprotein (VLDL), significantly increased following rIFN-alpha2a treatment. Lipoprotein lipase (LPL) and hepatic triglyceride lipase (HTGL) activities in the postheparin plasma were reduced by 75.7% and by 79.4%, respectively, and decreases in plasma cholesteryl ester transfer protein (CETP) activity and its protein mass were also observed. However, prothrombin time was ameliorated by rIFN-alpha2a, suggesting that the decrease in LPL, HTGL, and CETP activities may not be due to a reduction in protein synthesis by the liver. Simple correlation analysis demonstrated that the changes in LPL activity before and afte...Continue Reading

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