TLR4/MyD88-induced CD11b+Gr-1 int F4/80+ non-migratory myeloid cells suppress Th2 effector function in the lung.

TLR4/MyD88-induced CD11b+Gr-1 int F4/80+ non-migratory myeloid cells suppress Th2 effector function in the lung.
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TLR4/MyD88 诱导的 CD11b+Gr-1 int F4/80+ 非迁移性骨髓细胞抑制肺部的 Th2 效应器功能。

DOI:
10.1038/mi.2010.41
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发表时间:
2010-11
期刊:
影响因子:
8
通讯作者:
Ray, P.
Ray, P.
中科院分区:
医学1区
文献类型:
--
作者:
Arora, M.;Poe, S. L.;Oriss, T. B.;Krishnamoorthy, N.;Yarlagadda, M.;Wenzel, S. E.;Billiar, T. R.;Ray, A.;Ray, P.

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In humans, environmental exposure to a high dose of lipopolysaccharide (LPS) protects from allergic asthma the immunological underpinnings of which are not well understood. In mice, exposure to a high LPS dose blunted house dust mite-induced airway eosinophilia and Th2 cytokine production. While adoptively transferred Th2 cells induced allergic airway inflammation in control mice, they were unable to do so in LPS-exposed mice. LPS promoted the development of a CD11b+Gr1intF4/80+ lung-resident cell resembling myeloid-derived suppressor cells in a TLR4- and MyD88-dependent fashion that suppressed lung dendritic cell (DC)-mediated reactivation of primed Th2 cells. LPS effects switched from suppressive to stimulatory in MyD88-/- mice. Suppression of Th2 effector function was reversed by anti-IL-10 or inhibition of Arginase 1. Lineageneg bone marrow progenitor cells could be induced by LPS to develop into CD11b+Gr1intF4/80+ cells both in vivo and in vitro which when adoptively transferred suppressed allergen-induced airway inflammation in recipient mice. These data suggest that CD11b+Gr1intF4/80+ cells contribute to the protective effects of LPS in allergic asthma by tempering Th2 effector function in the tissue.
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