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Hepatocellular carcinoma and hepatitis B virus
Henry Lik-Yuen Chan1, Joseph Jao-Yiu Sung
1Institute of Digestive Diseases and Department of Medicine and Therapeutics, The Chinese University of Hong Kong, China.
Seminars in Liver Disease
|May 5, 2006
Summary
Chronic hepatitis B (Hepatitis B virus/HBV) is a leading cause of liver cancer (hepatocellular carcinoma/HCC) in Asia. This review details how HBV integration, viral factors, and host genetics contribute to liver cancer development.
Area of Science:
- Hepatology
- Oncology
- Virology
Background:
- Chronic hepatitis B is a primary driver of hepatocellular carcinoma (HCC) in Asia.
- Hepatitis B virus (HBV) genome integration is an early event in liver cancer development.
- Hepatic inflammation and cirrhosis exacerbate the carcinogenic process.
Purpose of the Study:
- To review the pathogenesis of HBV-related liver cancer.
- To identify viral and host factors that increase HCC risk.
Main Methods:
- Literature review of HBV-related carcinogenesis.
- Analysis of viral factors (genotype, mutations, viral load).
- Examination of host genetic factors (gene polymorphisms).
Main Results:
- HBV genome integration can activate oncogenes, promoting liver cell growth.
- Hepatitis B X protein acts as a transactivator, contributing to tumor development.
- Specific HBV genotypes, basal core promoter mutations, and high viral loads are linked to HCC.
Conclusions:
- HBV-related carcinogenesis involves complex interactions between viral integration, viral factors, and host genetic susceptibility.
- Understanding these factors is crucial for HCC prevention and management strategies.