Hepatitis B and D virus entry

Area of Science:

• Hepatology
• Virology
• Molecular Biology

Background:

• Hepatitis B virus (HBV) and Hepatitis D virus (HDV) entry into host cells is the critical first step in infection and a major barrier to cure.
• HBV and HDV exhibit a narrow host tropism, determined by specific cellular entry mechanisms.
• The sodium taurocholate cotransporting polypeptide (NTCP) was identified in 2012 as the primary entry receptor for both HBV and HDV.

Purpose of the Study:

• To review the current understanding of HBV and HDV entry mechanisms.
• To highlight the role of NTCP in viral tropism and infection.
• To discuss future perspectives for antiviral development based on entry pathways.

Main Methods:

• Literature review of studies on HBV and HDV entry mechanisms.
• Analysis of research on the HBV/HDV-NTCP interaction.
• Examination of structural biology findings related to NTCP and viral preS1 domain.

Main Results:

• Extensive analysis has elucidated the mechanisms of HBV and HDV entry via NTCP.
• Understanding viral entry has improved insights into host tropism.
• Recent structural data on NTCP-preS1 interactions provide a foundation for further research.

Conclusions:

• HBV and HDV entry mechanisms are increasingly understood, largely due to the identification of NTCP.
• Knowledge of viral entry pathways opens new avenues for developing targeted antiviral therapies.
• Continued research into viral entry processes is essential for advancing HBV and HDV treatment strategies.