CD4 T helper type 1 and regulatory T cells induced against the same epitopes on the core protein in hepatitis C virus-infected persons

The Journal of Infectious Diseases
Angus J MacDonaldKingston H G Mills

Abstract

The factors that determine persistence or clearance of hepatitis C virus (HCV) infection are poorly understood. The CD4 T cell responses to the HCV core protein were examined in a cohort of women infected with a single genotype of HCV. CD4 T cells from HCV-infected patients secreted interferon (IFN)-gamma in response to peptides from 4 immunodominant regions of the core protein, and these responses were stronger in persistently infected women. Interleukin (IL)-10 was also produced by CD4 T cells from HCV-infected subjects in response to the same core peptides. Furthermore, HCV core-specific CD4 T cell clones secreted either IFN-gamma or IL-10 but not IL-4. These findings demonstrate that T helper type 1 and regulatory T cells are induced against the same epitopes on the core protein during HCV infection.

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