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- W1520258172 abstract "The biological mechanism underlying the association between IFNL4/IFNL3 polymorphism and peginterferon/ribavirin (PR) response in HCV-1 is thought to involve differential intrahepatic interferon-stimulated gene expression. HCV-3 is more sensitive to PR, but there are no studies of the association between IFNL4 polymorphism, PR treatment response and liver interferon-stimulated gene expression in HCV-3.We evaluated the association between IFNL4/IFNL3 genotypes, PR treatment outcomes and intrahepatic interferon-stimulated gene expression, according to HCV genotype.HCV-1 and HCV-3 patients who received PR therapy were identified. IFNL3 (rs12979860) and IFNL4 genotype (rs368234815) were determined. A second cohort with stored liver specimens was identified. Expression of ISGs was measured by rt-PCR.Two hundred and fifty-nine patients were identified: 55% HCV-1, 45% HCV-3. IFNL4 genotype frequency was TT/TT 44%, TT/ΔG 42% andΔG/ΔG 14%. Linkage disequilibrium with IFNL3 genotype was high (r(2) = 0.98). The association between IFNL4 genotype and PR response was attenuated in HCV-3 vs. HCV-1 (HCV-3: SVR 89% vs. 76% vs. 72% for TT/TT vs. TT/ΔG vs. ΔG/ΔG, P = 0.09; HCV-1: SVR: 82% vs. 29% vs. 24%, P < 0.001). Intrahepatic ISG expression was evaluated in 92 patients; 61% HCV-1. The association between IFNL4 genotype and liver ISG expression was significantly different for HCV-3 vs. HCV-1 (P-value for interaction = 0.046), with levels of interferon-stimulated gene expression being highest in HCV-1 patients who carried a poor-response IFNL4 genotype.The relationship between IFNL4 genotype and PR treatment response as well as intrahepatic interferon-stimulated gene expression differs between HCV-1 and HCV-3. These data suggest fundamental differences in host-virus interactions according to HCV genotype." @default.
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- W1520258172 date "2015-06-01" @default.
- W1520258172 modified "2023-09-27" @default.
- W1520258172 title "The relationships between<i>IFNL4</i>genotype, intrahepatic interferon-stimulated gene expression and interferon treatment response differs in HCV-1 compared with HCV-3" @default.
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- W1520258172 doi "https://doi.org/10.1111/apt.13263" @default.
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