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Background  A potato protein hydrolysate, APPH is a potential anti-obesity diet ingredient. Since, obesity leads to deterioration of liver function and associated liver diseases, in this study the effect of APPH on high fat diet (HFD) associated liver damages was investigated.    Methods  Six week old male hamsters were randomly separated to six groups ( n  = 8) as control, HFD (HFD fed obese), L-APPH (HFD + 15 mg/kg/day of APPH), M-APPH (HFD + 30 mg/kg/day), H-APPH (HFD + 75 mg/kg/day of APPH) and PB (HFD + 500 mg/kg/day of probucol). HFD fed hamsters were administered with APPH 50 days through oral gavage. The animals were euthanized and the number of apoptotic nuclei in liver tissue was determined by TUNEL staining and the extent of interstitial fibrosis was determined by Masson’s trichrome staining. Modulation in the molecular events associated with apoptosis and fibrosis were elucidated from the western blotting analysis of the total protein extracts.    Results  Hamsters fed with high fat diet showed symptoms of liver damage as measured from serum markers like alanine aminotransferase and aspartate aminotransferase levels. However a 50 day long supplementation of APPH effectively ameliorated the effects of HFD. HFD also modulated the expression of survival and apoptosis proteins in the hamster liver. Further the HFD groups showed elevated levels of fibrosis markers in liver. The increase in fibrosis and apoptosis was correlated with the increase in the levels of phosphorylated extracellular signal-regulated kinases (pERK1/2) revealing a potential role of ERK in the HFD mediated liver damage. However APPH treatment reduced the effect of HFD on the apoptosis and fibrosis markers considerably and provided hepato-protection.    Conclusion  APPH can therefore be considered as an efficient therapeutic agent to ameliorate high fat diet related liver damages.

bmc complementary and alternative medicine

Protein hydrolysate from potato confers hepatic-protection in hamsters against high fat diet induced apoptosis and fibrosis by suppressing Caspase-3 and MMP2/9 and by enhancing Akt-survival pathway