Chapter 12

Hepatitis B and Hepatocellular Carcinoma

Marie Annick Buendia

Marie Annick Buendia

Hepatobiliary Center, Paul Brousse Hospital, University Paris-Sud, Villejuif, France

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Pierre Tiollais

Pierre Tiollais

Unite d’Organisation Nucleaire et Oncogenese, INSERM U.579, Institut Pasteur, Paris, France

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First published: 26 July 2013

Summary

Hepatocellular carcinoma (HCC) is among the most common cancers in the world and one of the few human cancers caused by viral infections. The hepatitis B virus (HBV) is a major risk factor of HCC development, but the underlying oncogenic mechanisms have not been fully elucidated. Malignant transformation occurs after a long period of chronic liver disease, frequently associated with cirrhosis, suggesting a nonspecific mechanism triggered by the host immune response. However, the virus might play a direct role as an insertional mutagen through viral DNA integration into the host genome. Viral proteins, including the transcriptional activator HBx and the large and middle surface proteins, can act as cofactors by interfering with regulatory processes. Because HCC carries a dismal prognosis, there is urgent need to develop early diagnostic markers of HCC and effective therapies against chronic hepatitis B. This chapter reviews various mechanisms linking chronic HBV infection to malignant transformation, with reference to recent advances provided by genomewide analysis of HBV-related HCC.

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