CD4+ T helper cells use CD154-CD40 interactions to counteract T reg cell-mediated suppression of CD8+ T cell responses to influenza.
CD4+ T helper cells use CD154-CD40 interactions to counteract T reg cell-mediated suppression of CD8+ T cell responses to influenza.
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DOI:
10.1084/jem.20130097
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发表时间:
2013-07-29
期刊:
影响因子:
--
通讯作者:
Randall TD
中科院分区:
文献类型:
--
作者:
Ballesteros-Tato A;León B;Lund FE;Randall TD
CD40+ DCs interact with CD154+CD4+ T cells to abrogate T reg cell–mediated suppression of influenza-specific CD8+ T cells. CD4+ T cells promote CD8+ T cell priming by licensing dendritic cells (DCs) via CD40–CD154 interactions. However, the initial requirement for CD40 signaling may be replaced by the direct activation of DCs by pathogen-derived signals. Nevertheless, CD40–CD154 interactions are often required for optimal CD8+ T cell responses to pathogens for unknown reasons. Here we show that CD40 signaling is required to prevent the premature contraction of the influenza-specific CD8+ T cell response. CD40 is required on DCs but not on B cells or T cells, whereas CD154 is required on CD4+ T cells but not CD8+ T cells, NKT cells, or DCs. Paradoxically, even though CD154-expressing CD4+ T cells are required for robust CD8+ T cell responses, primary CD8+ T cell responses are apparently normal in the absence of CD4+ T cells. We resolved this paradox by showing that the interaction of CD40-bearing DCs with CD154-expressing CD4+ T cells precludes regulatory T cell (T reg cell)–mediated suppression and prevents premature contraction of the influenza-specific CD8+ T cell response. Thus, CD4+ T helper cells are not required for robust CD8+ T cell responses to influenza when T reg cells are absent.
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影响因子:
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作者:
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DOI:
10.4049/jimmunol.1000423
发表时间:
2010-08-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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Journal of immunology (Baltimore, Md. : 1950)
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DOI:
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发表时间:
2011-02-08
影响因子:
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通讯作者:
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