The favorable IFNL3 genotype escapes mRNA decay mediated by AU-rich elements and hepatitis C virus-induced microRNAs.
The favorable IFNL3 genotype escapes mRNA decay mediated by AU-rich elements and hepatitis C virus-induced microRNAs.
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DOI:
10.1038/ni.2758
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发表时间:
2014-01
影响因子:
30.5
通讯作者:
Savan, Ram
中科院分区:
文献类型:
--
作者:
McFarland, Addle P.;Horner, Stacy M.;Jarret, Abigail;Joslyn, Rochelle C.;Bindewald, Eckart;Shapiro, Bruce A.;Delker, Don A.;Hagedorn, Curt H.;Carrington, Mary;Gale, Michael, Jr.;Savan, Ram
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.
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