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Semin Liver Dis. 2019 Jul;39(3):301-314. doi: 10.1055/s-0039-1685518. Epub 2019 Jul 2.

Hepatitis B Virus-Hepatocyte Interactions and Innate Immune Responses: Experimental Models and Molecular Mechanisms.

Thomas E1,2,3, Baumert TF4,5,6.

Author information

1
Schiff Center for Liver Diseases, University of Miami Miller School of Medicine, Miami, Florida.
2
Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, Florida.
3
Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida.
4
Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France.
5
Laboratory of Excellence HEPSYS, University of Strasbourg, Strasbourg, France.
6
Institut Hospitalo-Universitaire, Pôle hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France.

Abstract

Chronic hepatitis B virus (HBV) infection is a major cause of liver disease and cancer worldwide. While current therapeutic approaches can efficiently control viral infection, efficient curative antivirals are absent. The understanding of virus-hepatocyte interactions and sensing of viral infection is an important prerequisite for the development of novel antiviral therapies for cure. Hepatocyte intrinsic innate immunity provides a rapid first line of defense to combat viral infection through the upregulation of antiviral and inflammatory genes. However, the functional relevance of many of these antiviral signaling pathways in the liver and their role in HBV pathogenesis is still only partially understood. The recent identification of intracellular RNA and DNA sensing pathways and their involvement in disease biology, including viral pathogenesis and carcinogenesis, is currently transforming our understanding of virus-host interactions. Here the authors review the current knowledge on intrinsic antiviral innate immune responses including the role of viral nucleic acid sensing pathways in the liver. Since HBV has been designated as a "stealth virus," the study of the impact of HBV on signaling pathways in the hepatocyte is of significant interest to understand viral pathogenesis. Characterizing the mechanism underlying these HBV-host interactions and targeting related pathways to enhance antiviral innate responses may open new strategies to trigger noncytopathic clearance of covalently closed circular DNA to ultimately cure patients with chronic HBV infection.

PMID:
31266064
DOI:
10.1055/s-0039-1685518

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