Plasmacytoid dendritic cell dichotomy: identification of IFN-α producing cells as a phenotypically and functionally distinct subset.

Plasmacytoid dendritic cell dichotomy: identification of IFN-α producing cells as a phenotypically and functionally distinct subset.
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DOI:
10.4049/jimmunol.1000454
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发表时间:
2011-02-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Engleman EG
Engleman EG
中科院分区:
其他
文献类型:
--
作者:
Björck P;Leong HX;Engleman EG

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Plasmacytoid dendritic cells (pDC) produce large amounts of type I interferon in response to invading pathogens, but can also suppress immune responses and promote tolerance. Here we show that in mice these functions are attributable to two distinct pDC subsets, one of which gives rise to the other. CD9pos Siglec-Hlow pDC secrete interferon-α (IFN-α) when stimulated with Toll-like receptor (TLR) agonists, induce cytotoxic T lymphocytes (CTLs) and promote protective anti-tumor immunity. By contrast, CD9neg Siglec-Hhigh pDC secrete negligible amounts of IFN-α, induce FoxP3+ CD4+ T cells and fail to promote anti-tumor immunity. Although newly formed pDC in the bone marrow (BM) are CD9pos and are capable of producing IFN-α, after these cells traffic to peripheral tissues they lose CD9 expression and the ability to produce IFN-α. We propose that newly generated pDC mobilized from the BM, rather than tissue-resident pDC, are the major source of IFN-α in infected hosts.
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