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- W2893004607 abstract "Strategies that target functional recovery of exhausted hepatitis B virus (HBV)–specific CD8+ T cells are beneficial for viral control, but the potential for interleukin 21 (IL-21) to rescue CD8+ T-cell function is not well understood. We investigated the effect of IL-21 on CD8+ T-cell responses by phenotypic and functional analysis of samples from patients with chronic HBV infection and a mouse model with HBV expression. IL-21 promoted the proliferative capacity of HBV-specific CD8+ T cells and down-regulated expression of the inhibitory receptors programmed death 1 and T-cell immunoglobulin domain and mucin domain 3. Additionally, IL-21 boosted the production of interferon-γ, granzyme B, and CD107a in HBV-specific CD8+ T cells and enhanced the cytolytic activity of CD8+ T cells against HepG2.2.15 cells. Notably, an HBV mouse model established from IL-21 receptor knockout mice showed significantly decreased frequency of HBV-specific CD8+ T cells and increased levels of serum hepatitis B surface antigen (HBsAg). Meanwhile, administration of recombinant mouse IL-21 in an HBV mouse model established from wild-type mice resulted in enhanced functionality of HBV-specific CD8+ T cells and accelerated HBsAg clearance. IL-21 enhances the antiviral effect of HBV-specific CD8+ T cells, suggesting that it may contribute to viral clearance in chronic HBV infection." @default.
- W2893004607 created "2018-10-05" @default.
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- W2893004607 date "2018-09-27" @default.
- W2893004607 modified "2023-10-17" @default.
- W2893004607 title "Interleukin 21 Reinvigorates the Antiviral Activity of Hepatitis B Virus (HBV)–Specific CD8+ T Cells in Chronic HBV Infection" @default.
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- W2893004607 doi "https://doi.org/10.1093/infdis/jiy576" @default.
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