A simple method for inducing nonalcoholic steatohepatitis with fibrosis

Area of Science:

• Hepatology
• Animal Models
• Metabolic Syndrome

Background:

• Nonalcoholic fatty liver disease (NAFLD) is a growing concern, particularly in sedentary populations, with potential progression to nonalcoholic steatohepatitis (NASH) and hepatocellular carcinoma.
• Developing cost-effective animal models is crucial for studying NAFLD and NASH.
• This study aimed to establish an affordable and rapid animal model for NASH.

Purpose of the Study:

• To develop a quick, easy, and affordable high-fat diet (HFD)-induced animal model for nonalcoholic steatohepatitis (NASH).

Main Methods:

• Twenty-four male C57BL/6J mice were divided into two groups: one receiving a high-fat diet (HFD) and the other a normal diet (ND).
• The HFD was administered via oral gavage and mixed with animal pellets for four weeks.
• Evaluations included body and liver weights, biochemical parameters, PPAR-α gene expression, and liver histopathology.

Main Results:

• The HFD group exhibited significant liver weight gain but not overall body weight gain compared to the ND group over four weeks.
• Histological analysis confirmed NASH symptoms in the HFD group's livers.
• Key biochemical changes in the HFD group included decreased HDL-c, SOD, catalase, FRAP, adiponectin, and PPAR-α, alongside increased lipid profiles, hepatic enzymes, MDA, leptin, and TNF-α compared to the ND group.

Conclusions:

• The developed high-fat diet model successfully induced all aspects of NASH, including fibrosis, within a four-week timeframe.
• This HFD model is a cost-effective tool for NASH research.