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Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
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[HBx Protein Potentiates Hepatitis B Virus Reactivation]
S A Brezgin1,2, A P Kostyusheva1,3, N I Ponomareva1,2
1Martsinovsky Institute of Medical Parasitology, Tropical and Vector-Borne Diseases, Sechenov First Moscow State Medical University, Ministry of Healthcare of the Russian Federation (Sechenov University), Moscow, 119048 Russia.
Molekuliarnaia Biologiia
|September 27, 2022
Summary
Hepatitis B virus (HBV) can reactivate from an inactive state, particularly when the HBx protein is altered. Certain treatments like doxorubicin and hydrogen peroxide can trigger HBV reactivation.
Area of Science:
- Hepatology
- Virology
- Molecular Biology
Background:
- Chronic Hepatitis B (HBV) affects over 250 million globally.
- HBV reactivation can lead to severe liver complications and death.
- Understanding HBV reactivation mechanisms is crucial for patient management.
Purpose of the Study:
- To investigate the role of HBx protein in HBV reactivation.
- To explore HBV reactivation from a transcriptionally silenced state.
- To examine HBV reactivation induced by genotoxic and targeted therapies.
Main Methods:
- Analysis of HBx protein effects on HBV replication.
- Modeling HBV reactivation from a methylated, transcriptionally inactivated HBV genome.
- Treatment of HBV models with doxorubicin, hydrogen peroxide, sunitinib, and bortezomib.
Main Results:
- Wild-type and mutant HBx proteins potentiate HBV replication and reactivation.
- HBV reactivation from a transcriptionally inactive state was demonstrated.
- Doxorubicin and hydrogen peroxide induced HBV reactivation in both active and silenced viral genomes.
- Sunitinib showed weak reactivation; bortezomib had no effect in vitro.
Conclusions:
- HBx protein, especially mutant forms, plays a significant role in promoting HBV reactivation.
- HBV can reactivate from a transcriptionally silenced state.
- Genotoxic agents can induce HBV reactivation, highlighting potential risks during treatment.
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