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Real-Time Polymerase Chain Reaction-Based Detection and Quantification of Hepatitis B Virus DNA
Published on: December 15, 2023
Current status of liver diseases in Korea: hepatitis B
Hee Bok Chae1, Jong-Hyun Kim, Ja Kyung Kim
1Department of Internal Medicine, Chungbuk National Unviersity College of Medicine, Cheongju, Korea.
Insights
Hepatitis B virus (HBV) infection remains a significant liver disease concern in Korea. Nationwide vaccination has drastically reduced childhood HBV seropositivity, though treatment and vaccine response require further research.
Area of Science:
- Hepatology
- Virology
- Public Health
Background:
- Hepatitis B virus (HBV) infection is a leading cause of liver disease in Korea.
- Hepatitis B surface antigen (HBsAg) prevalence decreased from 6.6-8.6% in the 1980s to 5.7% in the 1990s.
- Nationwide vaccination programs significantly reduced childhood HBV seropositivity to 0.2%.
Purpose of the Study:
- To review the epidemiology and management of Hepatitis B virus infection in Korea.
- To highlight advancements in antiviral therapies for chronic hepatitis B.
- To identify areas for future research in HBV infection.
Main Methods:
- Review of epidemiological data on HBsAg prevalence over decades.
- Analysis of treatment strategies, including interferon alpha, lamivudine, adefovir, entecavir, clevudine, and telbivudine.
- Discussion of vaccine efficacy and challenges.
Main Results:
- Significant decrease in HBV seropositivity, especially in children, following vaccination.
- Established efficacy of oral antiviral agents like lamivudine and adefovir for chronic HBV.
- Identified a 4.25% failure rate in perinatal prophylaxis for infants born to HBsAg-positive mothers.
Conclusions:
- While vaccination has been highly effective, challenges remain in perinatal prophylaxis and treatment of chronic hepatitis B.
- The development of potent oral antiviral agents has transformed HBV management.
- Further research is needed to understand HBV natural history, optimize treatment, and address vaccine non-response.
Abstract:
Hepatitis B virus (HBV) infection is the one of the most common causes of the liver diseases in Korea. Since the discovery of Australia antigen (hepatitis associated antigen, or HBsAg later), hepatitis associated antigen was tested widely. HBsAg was detected in 6.6-8.6% in 1980's. Later, it decreased to 5.7% in 1990's. Remarkably, seropositivity of the children deceased to 0.2% after the nationwide vaccination program. Although hepatitis B vaccines are highly effective, the failure rate of perinatal prophylaxis in babies born to HBsAg positive mother was reported to be 4.25%. Treatment of chronic hepatitis B was initiated after the introduction of interferon alpha. Lamivudine opened a new era of oral antiviral agent, and it has been widely used in Korea since 1999. Adefovir was proven to have a good efficacy for lamivudine-resistant chronic hepatitis B. Newer potent antiviral agents such as entecavir, clevudine, and telbivudine are available currently. Further studies are warranted for understanding factors influencing natural history, improving treatment outcomes, and overcoming vaccine non-response.
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