title: MiR-122 in hepatitis B virus and hepatitis C virus dual infection.
abstract: Hepatitis B virus (HBV) and hepatitis C virus (HCV) infections are the most common causes of chronic liver diseases and hepatocelluar carcinomas. Over the past few years, the liver-enriched microRNA-122 (miR-122) has been shown to differentially regulate viral replication of HBV and HCV. It is notable that the level of miR-122 is positively and negatively regulated by HCV and HBV, respectively. Consistent with the well-documented phenomenon that miR-122 promotes HCV accumulation, inhibition of miR-122 has been shown as an effective therapy for the treatment of HCV infection in both chimpanzees and humans. On the other hand, miR-122 is also known to block HBV replication, and HBV has recently been shown to inhibit miR-122 expression; such a reciprocal inhibition between miR-122 and HBV suggests an intriguing possibility that miR-122 replacement may represent a potential therapy for treatment of HBV infection. As HBV and HCV have shared transmission routes, dual infection is not an uncommon scenario, which is associated with more advanced liver disease than either HBV or HCV mono-infection. Thus, there is a clear need to further understand the interaction between HBV and HCV and to delineate the role of miR-122 in HBV/HCV dual infection in order to devise effective therapy. This review summarizes the current understanding of HBV/HCV dual infection, focusing on the pathobiological role and therapeutic potential of miR-122.
authors.affiliation: Kyoungsub Song, Chang Han, Srikanta Dash, Tong Wu, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA 70112, United States.
authors.forename: Kyoungsub
authors.initials: K
authors.lastname: Song
authors.affiliation: Kyoungsub Song, Chang Han, Srikanta Dash, Tong Wu, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA 70112, United States.
authors.forename: Chang
authors.initials: C
authors.lastname: Han
authors.affiliation: Kyoungsub Song, Chang Han, Srikanta Dash, Tong Wu, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA 70112, United States.
authors.forename: Srikanta
authors.initials: S
authors.lastname: Dash
authors.affiliation: Kyoungsub Song, Chang Han, Srikanta Dash, Tong Wu, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA 70112, United States.
authors.forename: Luis A
authors.initials: LA
authors.lastname: Balart
authors.affiliation: Kyoungsub Song, Chang Han, Srikanta Dash, Tong Wu, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, LA 70112, United States.
authors.forename: Tong
authors.initials: T
authors.lastname: Wu
keywords: Hepatitis B virus; Hepatitis B virus/hepatitis C virus dual infection; Hepatitis C virus; MiR-122
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