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• W1989863794 abstract "Hepatic gene transfer using adeno-associated viral (AAV) vectors has been shown to efficiently induce immunological tolerance to a variety of proteins. Regulatory T-cells (Treg) induced by this route suppress humoral and cellular immune responses against the transgene product. In this study, we examined the roles of immune suppressive cytokines interleukin-10 (IL-10) and transforming growth factor-β (TGF-β) in the development of tolerance to human coagulation factor IX (hF.IX). Interestingly, IL-10 deficient C57BL/6 mice receiving gene transfer remained tolerant to hF.IX and generated Treg that suppressed anti-hF.IX formation. Effects of TGF-β blockade were also minor in this strain. In contrast, in C3H/HeJ mice, a strain known to have stronger T-cell responses against hF.IX, IL-10 was specifically required for the suppression of CD8+ T-cell infiltration of the liver. Furthermore, TGF-β was critical for tipping the balance toward an regulatory immune response. TGF-β was required for CD4+CD25+FoxP3+ Treg induction, which was necessary for suppression of effector CD4+ and CD8+ T-cell responses as well as antibody formation. These results demonstrate the crucial, nonredundant roles of IL-10 and TGF-β in prevention of immune responses against AAV-F.IX-transduced hepatocytes. Hepatic gene transfer using adeno-associated viral (AAV) vectors has been shown to efficiently induce immunological tolerance to a variety of proteins. Regulatory T-cells (Treg) induced by this route suppress humoral and cellular immune responses against the transgene product. In this study, we examined the roles of immune suppressive cytokines interleukin-10 (IL-10) and transforming growth factor-β (TGF-β) in the development of tolerance to human coagulation factor IX (hF.IX). Interestingly, IL-10 deficient C57BL/6 mice receiving gene transfer remained tolerant to hF.IX and generated Treg that suppressed anti-hF.IX formation. Effects of TGF-β blockade were also minor in this strain. In contrast, in C3H/HeJ mice, a strain known to have stronger T-cell responses against hF.IX, IL-10 was specifically required for the suppression of CD8+ T-cell infiltration of the liver. Furthermore, TGF-β was critical for tipping the balance toward an regulatory immune response. TGF-β was required for CD4+CD25+FoxP3+ Treg induction, which was necessary for suppression of effector CD4+ and CD8+ T-cell responses as well as antibody formation. These results demonstrate the crucial, nonredundant roles of IL-10 and TGF-β in prevention of immune responses against AAV-F.IX-transduced hepatocytes." @default.
• W1989863794 created "2016-06-24" @default.
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• W1989863794 date "2011-07-01" @default.
• W1989863794 modified "2023-10-02" @default.
• W1989863794 title "Nonredundant Roles of IL-10 and TGF-β in Suppression of Immune Responses to Hepatic AAV-Factor IX Gene Transfer" @default.
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• W1989863794 doi "https://doi.org/10.1038/mt.2011.33" @default.
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