Abstract
Abstract This study aimed to investigate the effect of stevioside on fatty liver. Rats with hyperlipidemic fatty liver were treated with 75–150 mg/kg stevioside for 6 weeks. After oral administration of stevioside, the levels of serum and hepatic lipids and degree of hepatic steatosis were decreased. Stevioside treatment increased the expressions of hepatic peroxisome proliferator-activated receptor (PPAR)α and carnitine palmitoyltransferase-1A proteins and decreased the expressions of hepatic sterol regulatory element-binding protein-1c, fatty acid synthase and diacylglycerol acyltransferase proteins. Following treatment of oleic acid-stimulated hepatocytes with 100–400 μM stevioside, the intracellular lipids were also decreased. In the hepatocytes of PPARα gene silence, the lipid-lowering effect of stevioside was abolished, and its regulatory effects on PPARα-mediated target proteins were reversed. These findings demonstrated that stevioside was effective in treating fatty liver, and its mechanisms were associated with the increment of hepatic PPARα expression and subsequent modulation of its target gene expressions.
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