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Updated: Aug 5, 2025
09:35
Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
13.3K
Hepatitis B Virus Capsid: The Core in Productive Entry and Covalently Closed Circular DNA Formation
Megan A Mendenhall1, Xupeng Hong1, Jianming Hu1
1Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Viruses
|March 30, 2023
Summary
Hepatitis B virus core protein (HBc) is crucial for forming cccDNA, essential for infection. HBc influences viral trafficking and uncoating, impacting cccDNA formation during infection and recycling, and determining host tropism.
Area of Science:
- Hepatology and Virology
Background:
- Hepatitis B virus (HBV) infection depends on the core protein (HBc) for establishing covalently closed circular DNA (cccDNA) and completing its lifecycle.
- HBc forms an icosahedral capsid, encapsidating viral pregenomic RNA (pgRNA) and facilitating reverse transcription to relaxed circular DNA (rcDNA).
Purpose of the Study:
- To investigate the differential roles of HBc in cccDNA formation during de novo HBV infection versus intracellular recycling.
- To elucidate HBc's function in HBV trafficking, nucleocapsid disassembly (uncoating), and host factor interactions.
Main Methods:
- Utilized HBc mutations and small molecule inhibitors to study HBV infection dynamics.
- Analyzed the impact of HBc on viral entry, trafficking, and cccDNA formation in hepatocytes.
Main Results:
- Demonstrated differential effects of HBc on cccDNA formation in de novo infection compared to recycling.
- Highlighted HBc's critical role in HBV trafficking, nucleocapsid uncoating, and release of rcDNA for cccDNA production.
Conclusions:
- HBc plays a pivotal role in HBV infection, influencing viral entry, trafficking, and cccDNA formation.
- Understanding HBc's function in host interactions and tropism is key for developing HBV cures and animal models.
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