Differential effects of olive oil, soybean oil, corn oil and lard oil on carbon tetrachloride induced liver fibrosis in mice.

Olive oil could attenuate carbon tetrachloride (CCl₄) induced liver fibrosis (LF) in mouse model. This study aimed to evaluate the effects of other common oils on CCl₄ induced LF. Healthy male ICR mice were administered with CCl₄ intraperitoneally at 2.5 ml/kg twice a week for total 3 weeks. Mice were pre-treated with olive oil, soybean oil, corn oil or lard oil. After treatment, histopathological changes were observed using Masson trichrome staining, and alanine aminotransferase (ALT), aspartate aminotransferase (AST), malondialdehyde (MDA), hydroxyproline (HYP) and triglyceride (TG) were measured by commercial kits. The expression of LF related genes was detected by quantitative real-time PCR. We found that soybean oil or olive oil significantly reduced ALT and AST levels in serum, and MDA, HYP and TG levels in the liver, compared to corn oil or lard oil. Moreover, Masson trichrome staining and real-time PCR showed that the mice treated with CCl₄ dissolved in soybean oil or olive oil had less fibrosis and apoptosis in the liver comparted to the mice treated with CCl₄ dissolved in corn oil or lard oil. In conclusion, soybean oil but not corn or lard oil exerts protective effects against CCl₄ induced LF in mice, possibly due to its antioxidant activity.