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Real-Time Polymerase Chain Reaction-Based Detection and Quantification of Hepatitis B Virus DNA
Published on: December 15, 2023
Role of molecular diagnostics in the management of viral hepatitis B
1ICMR Virus Unit , GB 4, 1st Floor, ID & BG Hospital Campus, 57, Dr. Suresh Chandra Banerjee Road, Kolkata 700010 , India +91 33 2353 7425 ; +91 33 2353 7424 ; runugc@gmail.com.
Insights
Monitoring chronic hepatitis B (CHB) infection relies on viral load, but newer molecular diagnostics are crucial for assessing disease severity, treatment response, and drug resistance, minimizing patient morbidity.
Area of Science:
- Hepatology
- Virology
- Molecular Diagnostics
Background:
- Chronic hepatitis B virus (HBV) infection affects 350-400 million globally, causing liver disease, cirrhosis, and hepatocellular carcinoma.
- Accurate diagnosis and classification are vital for determining appropriate therapy in HBV patients.
Purpose of the Study:
- To review existing and emerging molecular diagnostic and monitoring tools for chronic liver disease.
- To highlight advancements in managing chronic hepatitis B (CHB).
Main Methods:
- Overview of recent data on molecular diagnostic and monitoring tools for chronic liver disease.
- Analysis of HBV viral load, genotyping, and covalently closed circular DNA (cccDNA) in disease management.
Main Results:
- HBV viral load monitoring is key for assessing severity, predicting outcomes, guiding therapy, and detecting resistance.
- Phenotyping/genotyping identifies antiviral resistance, while HBV genotype and mutants influence treatment efficacy.
- The role of covalently closed circular DNA (cccDNA) in CHB management is increasingly recognized.
Conclusions:
- Advanced molecular methods are essential for improved CHB management.
- Further research into novel molecular diagnostics will reduce morbidity in CHB patients.
- Integrating viral load, genotyping, and cccDNA assessment offers a comprehensive approach to CHB.
Introduction:
Despite the availability of a safe and effective vaccine, chronic hepatitis B virus (HBV) infection continues to be a global health concern with an estimated 350 - 400 million people infected worldwide. Globally, HBV is the leading cause of chronic liver disease that may progress to cirrhosis and hepatocellular carcinoma. Therefore, accurate diagnosis and classification of the disease are important to determine whether therapy is needed.
Areas Covered:
The review contains an overview of recent data on the existing and emerging developments in the molecular diagnostic and monitoring tools for chronic liver disease.
Expert Opinion:
Monitoring of HBV viral load is the most widely used method in assessing liver disease severity, predicting development of cirrhosis and hepatocellular carcinoma, deciding initiation of antiviral therapy, assessing treatment response as well as early detection of emergence of drug resistance. Some recent studies have downplayed the importance of viral load in HBV management. Phenotyping/genotyping methods can establish emergent resistance to antivirals. Increasing number of reports suggest that clinical outcome and efficacy of antiviral treatment might vary with HBV genotype and precore/core promoter mutants. The importance of covalently closed circular DNA is also becoming apparent in this regard. Further studies on the development of newer molecular methods for a better management of chronic hepatitis B (CHB) will minimize morbidity in CHB.
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