Abstract:
AIM:To assess whether treatment with insulin-sensitizing agents (ISAs) in combination with ezetimibe and valsartan have greater effect on hepatic fat content and lipid peroxidation compared to monotherapy in the methionine choline-deficient diet (MCDD) rat model of non-alcoholic fatty liver disease (NAFLD). METHODS:Rats (n = 6 per group) were treated with different drugs, including MCDD only, MCDD diet with either metformin (200 mg/kg), rosiglitazone (3 mg/kg), metformin plus rosiglitazone (M+R), ezetimibe (2 mg/kg), valsartan (2 mg/kg), or combination of all drugs for a total of 15 wk. Liver histology, lipids, parameters of oxidative stress and TNF-alpha were measured. RESULTS:Fatty liver (FL) rats demonstrated severe hepatic fatty infiltration (> 91% fat), with an increase in hepatic TG (+ 1263%, P < 0.001), hepatic cholesterol (+ 245%, P < 0.03), hepatic MDA levels (+ 225%, P < 0.001), serum TNF-alpha (17.8 +/- 10 vs 7.8 +/- 0.0, P < 0.001), but a decrease in hepatic alpha tocopherol (-74%, P<0.001) as compared to the control rats. Combination therapy with all drugs produced a significant decrease in liver steatosis (-54%), hepatic TG (-64%), hepatic cholesterol (-31%) and hepatic MDA (-70%), but increased hepatic alpha tocopherol (+ 443%) as compared to FL rats. Combination therapy with ISA alone produced a smaller decrease in liver steatosis (-32% vs -54%, P < 0.001) and in hepatic MDA levels (-55% vs -70%, P < 0.01), but a similar decrease in hepatic lipids when compared with the all drugs combination. TNF-alpha levels decreased significantly in all treatment groups except in ISA group. CONCLUSION:Combination therapies have a greater effect on liver fat content as compared to monotherapy. Rosiglitazone appears to improve hepatic steatosis to a greater extent than metformin.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Assy N,Grozovski M,Bersudsky I,Szvalb S,Hussein Odoi
10.3748/wjg.v12.i27.4369subject
Has Abstractpub_date
2006-07-21 00:00:00pages
4369-76issue
27eissn
1007-9327issn
2219-2840journal_volume
12pub_type
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