IFNL3 (IL28B) favorable genotype escapes hepatitis C virus-induced microRNAs and mRNA decay

The IFNL3 ( IL28B ) gene has received immense attention in the hepatitis C virus (HCV) field as multiple independent genome-wide association studies identified a strong association between polymorphisms near the IFNL3 gene and HCV clearance. However, the mechanism underlying this association has rem...

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Veröffentlicht in:Nature immunology 2013-11, Vol.15 (1), p.72-79
Hauptverfasser: McFarland, Adelle P., Horner, Stacy M., Jarret, Abigail, Joslyn, Rochelle C., Bindewald, Eckart, Shapiro, Bruce A., Delker, Don A., Hagedorn, Curt, Carrington, Mary, Gale, Michael, Savan, Ram
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container_title Nature immunology
container_volume 15
creator McFarland, Adelle P.
Horner, Stacy M.
Jarret, Abigail
Joslyn, Rochelle C.
Bindewald, Eckart
Shapiro, Bruce A.
Delker, Don A.
Hagedorn, Curt
Carrington, Mary
Gale, Michael
Savan, Ram
description The IFNL3 ( IL28B ) gene has received immense attention in the hepatitis C virus (HCV) field as multiple independent genome-wide association studies identified a strong association between polymorphisms near the IFNL3 gene and HCV clearance. However, the mechanism underlying this association has remained elusive. In this study, we report the identification of a functional polymorphism (rs4803217) located in the 3′ untranslated region (3′ UTR) of the IFNL3 mRNA that dictates transcript stability. This polymorphism influences AU-rich element-mediated decay as well as the binding of HCV-induced microRNAs during infection. Together, these pathways mediate robust repression of the unfavorable IFNL3 genotype. These data reveal a novel mechanism by which HCV attenuates the antiviral response and uncover new potential therapeutic targets for HCV treatment.
doi_str_mv 10.1038/ni.2758
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title IFNL3 (IL28B) favorable genotype escapes hepatitis C virus-induced microRNAs and mRNA decay
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