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- W2058643788 abstract "Hepatitis C virus (HCV) infection is a leading cause of chronic hepatitis, end-stage liver disease, and hepatocellular carcinoma throughout the world. Considerable evidence indicates that the risk of viral persistence, natural history, and response to antiviral therapy varies among racial groups, but limited data exist on potential mechanisms to account for these differences. Type 1 helper (Th1) responses to HCV proteins and cytomegalovirus (CMV) antigens were examined using a sensitive interferon (IFN)-γ enzyme-linked immunospot (ELISPOT) assay in 187 Caucasian American (CA) and 187 African American (AA) patients with chronic genotype 1 infection. ELISPOT responses were examined relative to human leukocyte antigen (HLA) class II alleles and outcome of therapy with pegylated IFN and ribavirin. Th1 responses specific to hepatitis C core protein and combined HCV antigens were significantly lower in AAs compared to CAs, but CMV responses were comparable in the 2 races. The HCV difference in immunity remained after adjusting for gender, serum alanine aminotransferase, histologic severity, and viral level, and was not accounted for by the differential prevalence of human leukocyte antigen class II alleles. Pretreatment total HCV-specific CD4+ T cell response was associated with sustained virologic response (SVR) to pegylated IFN and ribavirin; 43% of patients who had more than 168 ELISPOTs/106 peripheral blood mononuclear cells (above background) experienced SVR compared to 28% of those who did not (P= 0.007). ELISPOT response was independently associated with SVR by multivariable analysis. Conclusion: Compared to CAs, AAs have weaker HCV-specific immunity. Pretreatment HCV-specific immunity is associated with response to combination antiviral therapy. (HEPATOLOGY 2007.)" @default.
- W2058643788 created "2016-06-24" @default.
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- W2058643788 date "2007-08-01" @default.
- W2058643788 modified "2023-09-30" @default.
- W2058643788 title "Selective decrease in hepatitis C virus-specific immunity among African Americans and outcome of antiviral therapy" @default.
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- W2058643788 doi "https://doi.org/10.1002/hep.21714" @default.
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