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Disparity of basal and therapeutically activated interferon signalling in constraining hepatitis E virus infection.

Abstract：

:Hepatitis E virus (HEV) represents one of the foremost causes of acute hepatitis globally. Although there is no proven medication for hepatitis E, pegylated interferon-α (IFN-α) has been used as off-label drug for treating HEV. However, the efficacy and molecular mechanisms of how IFN signalling interacts with HEV remain undefined. As IFN-α has been approved for treating chronic hepatitis C (HCV) for decades and the role of interferon signalling has been well studied in HCV infection, this study aimed to comprehensively investigate virus-host interactions in HEV infection with focusing on the IFN signalling, in comparison with HCV infection. A comprehensive screen of human cytokines and chemokines revealed that IFN-α was the sole humoral factor inhibiting HEV replication. IFN-α treatment exerted a rapid and potent antiviral activity against HCV, whereas it had moderate and delayed anti-HEV effects in vitro and in patients. Surprisingly, blocking the basal IFN pathway by inhibiting JAK1 to phosphorylate STAT1 has resulted in drastic facilitation of HEV, but not HCV infection. Gene silencing of the key components of JAK-STAT cascade of the IFN signalling, including JAK1, STAT1 and interferon regulatory factor 9 (IRF9), stimulated HEV infection. In conclusion, compared to HCV, HEV is less sensitive to IFN treatment. In contrast, the basal IFN cascade could effectively restrict HEV infection. This bears significant implications in management of HEV patients and future therapeutic development.

journal_name

J Viral Hepat

journal_title

Journal of viral hepatitis

authors

Zhou X,Xu L,Wang W,Watashi K,Wang Y,Sprengers D,de Ruiter PE,van der Laan LJ,Metselaar HJ,Kamar N,Peppelenbosch MP,Pan Q

doi

10.1111/jvh.12491

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

294-304

issue

4

eissn

1352-0504

issn

1365-2893

journal_volume

23

pub_type

杂志文章

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