A Robust Human Liver Organoid Model of Hepatitis B Virus Infection

Area of Science:

• Hepatology
• Virology
• Regenerative Medicine

Background:

• Hepatitis B virus (HBV) infection is limited to primary human hepatocytes, posing challenges for in vitro research.
• Primary human hepatocytes (PHH) exhibit limited lifespan and lose function in culture, hindering HBV studies.
• Developing physiologically relevant in vitro models is crucial for understanding HBV infection and disease.

Purpose of the Study:

• To establish and validate a novel in vitro model for robust hepatitis B virus (HBV) infection.
• To overcome the limitations associated with using primary human hepatocytes (PHH) for HBV research.
• To support the complete HBV replication cycle in a physiologically relevant human liver model.

Main Methods:

• Human liver tissue fragments were cultured in a 3D matrix to form liver organoids.
• Liver organoids were expanded, cryopreserved, and differentiated to a hepatocyte phenotype.
• An adenoviral delivery system was used to achieve robust HBV infection in differentiated liver organoids.

Main Results:

• Human liver organoids effectively support hepatitis B virus (HBV) infection.
• The organoid model mitigates the limitations of short-lived primary human hepatocytes (PHH).
• The model supports the full HBV virus replication cycle, including viral entry, replication, and assembly.

Conclusions:

• Human tissue-derived liver organoids represent a novel and physiologically relevant in vitro model for HBV infection.
• This model system provides a valuable platform for studying HBV pathogenesis and developing antiviral therapies.
• Liver organoids offer a scalable, genetically stable, and reproducible system for HBV research.