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Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection
Published on: November 7, 2018
Viral hepatitis B
Ching Lung Lai1, Vlad Ratziu, Man-Fung Yuen
1Department of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China. hrmelcl@hkucc.hku.hk
Insights
Hepatitis B virus infection affects over 400 million people globally, leading to liver cancer and other severe conditions. Advances in vaccines and treatments offer hope for managing chronic hepatitis B (HBV) infection.
Area of Science:
- Hepatology
- Virology
- Oncology
Background:
- Chronic hepatitis B virus (HBV) infection impacts over 400 million individuals worldwide.
- HBV is a leading cause of liver cancer, gastrointestinal hemorrhage, and ascites.
- Significant progress in HBV diagnosis and treatment has been achieved.
Purpose of the Study:
- To review recent breakthroughs in hepatitis B diagnosis and treatment.
- To discuss the role of molecular virology in understanding HBV mutants.
- To explore the clinical significance of low viral load and genotypes in HBV infection.
Main Methods:
- Review of current literature on hepatitis B diagnosis and treatment.
- Analysis of advances in molecular virology, including HBV mutants.
- Investigation into the clinical significance of viral load and genotypes.
Main Results:
- Hepatitis B vaccine effectively reduces liver cancer incidence.
- Molecular virology has advanced understanding of naturally occurring and treatment-induced HBV mutants.
- Current monotherapies (interferon, lamivudine, adefovir dipivoxil) rarely eradicate HBV but reduce viral replication, necroinflammation, and fibrosis progression.
- Nucleoside analogues like lamivudine show potential in reversing liver cirrhosis.
Conclusions:
- Hepatitis B vaccination is crucial for preventing liver cancer.
- Ongoing research in molecular virology is key to understanding and combating HBV.
- While not curative, current therapies significantly improve outcomes for chronic HBV patients, with potential for liver damage reversal.
Abstract:
More than 400 million people worldwide are chronically infected by the hepatitis B virus. The virus is responsible for more than 300000 cases of liver cancer every year and for similar numbers of gastrointestinal haemorrhage and ascites. Major breakthroughs have been achieved in diagnosis and treatment of this virus. Hepatitis B vaccine reduces incidence of liver cancer. As with hepatitis C, advances have been made in molecular virology, especially for naturally occurring and treatment-induced mutant viruses. The clinical significance of low viral load and genotypes are also under investigation. Currently available monotherapies-interferon, lamivudine, and adefovir dipivoxil-very rarely eradicate the virus, but greatly reduce its replication, necroinflammatory histological activity, and progression of fibrosis. Lamivudine, and presumably other nucleoside analogues, can reverse cirrhosis of the liver.
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