New horizons for studying human hepatotropic infections

Area of Science:

• Hepatology
• Virology
• Infectious Diseases

Background:

• Hepatitis B and C viruses (HBV and HCV) and malaria parasites infect human liver cells (hepatocytes).
• Current small animal models for studying these hepatotropic pathogens are limited due to poor engraftment of human hepatocytes.
• Studying these diseases in vivo has been challenging, hindering research into pathogenesis and therapeutic development.

Discussion:

• Bissig et al. developed a novel xenotransplantation model using immunodeficient mice with liver injury engrafted with human hepatocytes.
• This model demonstrates robust infection with HBV and HCV, overcoming limitations of previous mouse models.
• The study highlights the potential of human liver chimeric mice for advancing research on liver-targeting pathogens.

Key Insights:

• Successful engraftment of large numbers of human hepatocytes in mice with liver injury.
• Demonstration of robust HBV and HCV infection in the developed xenotransplantation model.
• Establishment of a valuable platform for studying human hepatotropic pathogens.

Outlook:

• This technical advance is expected to increase the use of human liver chimeric mice in research.
• The model provides a foundation for creating more complex humanized mouse models.
• Future applications include studying immunopathogenesis and developing vaccines against liver-infecting viruses and parasites.