The mouse interferon-gamma transgene chronic hepatitis model (Review)

Area of Science:

• Hepatology and immunology
• Transgenic animal models

Background:

• Acute hepatitis models are insufficient for studying human chronic hepatitis.
• Developing accurate models for chronic liver disease is crucial for therapeutic research.

Purpose of the Study:

• To establish a reliable mouse model for chronic hepatitis.
• To investigate the pathological features of IFN-gamma-induced chronic hepatitis in mice.

Main Methods:

• Utilizing a transgenic mouse model expressing mouse interferon-gamma (IFN-gamma) gene in the liver.
• Analyzing liver histology for lymphoid cell infiltration and necroinflammation.
• Assessing the expression of Fas antigen and Fas ligand mRNA.
• Measuring CPP32-like protease activity in liver tissue.

Main Results:

• The IFN-gamma transgenic mouse spontaneously develops chronic hepatitis by 6-10 weeks of age.
• Hepatitis observed includes portal lymphoid cell infiltration and lobular necroinflammation, similar to human chronic hepatitis.
• Increased expression of Fas antigen and Fas ligand mRNA was detected in the liver.
• Induction of CPP32-like protease activity was observed in the transgenic mouse liver.

Conclusions:

• The IFN-gamma transgenic mouse serves as a valuable model for human chronic hepatitis.
• The model replicates key pathological features, including immune cell infiltration and apoptosis-related gene expression.
• Involvement of CPP32-like protease activity in chronic hepatitis development is suggested.