Hepatitis B virus movement through the hepatocyte: An update.

Area of Science:

• Virology
• Cell Biology
• Hepatology

Background:

• Hepatitis B virus (HBV) is a major cause of liver disease and a highly successful human pathogen.
• HBV relies on host cell machinery for its propagation and release, utilizing various trafficking pathways.
• Its small DNA genome necessitates efficient exploitation of host processes.

Purpose of the Study:

• To provide an overview of hepatitis B virus (HBV) maturation, assembly, and budding.
• To highlight recent advances in understanding HBV's interaction with host cell trafficking.
• To identify potential antiviral intervention targets by studying HBV subversion of cellular processes.

Main Methods:

• Review of cell culture-based studies.
• Analysis of HBV in vitro-replication systems.
• Examination of HBV in vitro-infection models.

Main Results:

• HBV exploits multiple host trafficking pathways, including secretory, exocytic, ESCRT, and autophagy pathways.
• HBV utilizes nucleocytoplasmic shuttling for its lifecycle.
• Diverse HBV particle types (virions, empty envelopes, naked capsids) are released via hijacked cellular machinery.

Conclusions:

• Understanding HBV's subversion of host membrane trafficking provides mechanistic insights into cellular processes.
• Targeting HBV's exploitation of host trafficking pathways offers potential for antiviral strategies.
• Further research is needed to address remaining questions in HBV assembly and release.