Hepatocellular endoplasmic reticulum stress plays an important role in the pathogenesis of non-alcoholic fatty liver disease (NAFLD). Hepatonuclear factor 4 α (HNF4α) reduced expression is an important event in the pathogenesis of non-alcoholic fatty liver and other liver diseases. Does endoplasmic reticulum stress regulate the expression of HNF4α is not clear yet. The purpose of this study is to elucidate the mechanism of HNF4 α protein degradation and exploration of…