Differential expansion, activation and effector functions of conventional and plasmacytoid dendritic cells in mouse tissues transiently infected with Listeria monocytogenes

Differential expansion, activation and effector functions of conventional and plasmacytoid dendritic cells in mouse tissues transiently infected with Listeria monocytogenes
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单核细胞增生李斯特菌瞬时感染小鼠组织中常规树突状细胞和浆细胞样树突状细胞的差异扩增、激活和效应功能

DOI:
10.1111/j.1462-5822.2006.00700.x
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发表时间:
2006
影响因子:
3.4
通讯作者:
M. Wick
M. Wick
中科院分区:
生物学2区
文献类型:
--
作者:
Miguel A Tam;M. Wick

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树突状细胞(DC)在产生对感染的免疫力中至关重要。在这里,我们描述了李斯特菌感染小鼠中DC在数量,激活和效应功能方面的变化,重点是常规DC(cDC)和浆细胞样DC(pDC)。动力学研究显示胃内感染后cDC的亚群和组织特异性扩增以及脾和肠系膜淋巴结(MLN)cDC上的CD 80和CD 86上调。pDC的扩增比cDC更长,并且在脾和MLN中pDC上调CD 86和MHC-II,但不上调CD 80。在感染期间,cDC是IL-12而不是TNF-α的重要来源,而pDC不产生这些细胞因子。相反,其他CD 11 cint细胞产生这些细胞因子。使用五色流式细胞术和双重细胞内细胞因子染色,我们在李斯特菌感染的组织中检测到表型相似的CD 11 cintCD 11b + Gr 1+细胞,具有不同的产生TNF-α/IL-12或TNF-α/iNOS(诱导型一氧化氮合酶)的能力。IL-12 p70也由分选的CD 11 chi和CD 11 cintCD 11b + Gr 1+细胞产生。此外,TNF-α、iNOS和IL-12的产生不同地依赖于细菌的细胞定位。细胞溶质限制性细菌诱导产生TNF-α和iNOS的细胞,尽管频率低于野生型细菌。相比之下,IL-12仅用野生型细菌诱导。这些数据为李斯特菌感染早期不同CD 11 c表达群体的相对丰度和功能提供了新的见解。
Dendritic cells (DC) are crucial in generating immunity to infection. Here we characterize changes in DC in terms of number, activation and effector functions, focusing on conventional DC (cDC) and plasmacytoid DC (pDC), in Listeria‐infected mice. Kinetic studies showed a subset‐ and tissue‐specific expansion of cDC and upregulation of CD80 and CD86 on splenic and mesenteric lymph node (MLN) cDC after intragastric infection. Expansion of pDC was more prolonged than cDC, and pDC upregulated CD86 and MHC‐II, but not CD80, in both the spleen and MLN. cDC were an important source of IL‐12 but not TNF‐α during infection, while pDC made neither of these cytokines. Instead other CD11cint cells produced these cytokines. Using five‐colour flow cytometry and double intracellular cytokine staining, we detected phenotypically similar CD11cintCD11b+Gr1+ cells with distinct capacities to produce TNF‐α/IL‐12 or TNF‐α/iNOS (inducible nitric oxide synthase) in Listeria‐infected tissues. IL‐12p70 was also produced by sorted CD11chi and CD11cintCD11b+Gr1+ cells. Furthermore, production of TNF‐α, iNOS and IL‐12 was differentially dependent on cellular localization of the bacteria. Cytosol‐restricted bacteria induced TNF‐α and iNOS‐producing cells, albeit at lower frequency than wild‐type bacteria. In contrast, IL‐12 was induced only with wild‐type bacteria. These data provide new insight into the relative abundance and function of distinct CD11c‐expressing populations during the early stage of Listeria infection.
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发表时间: 2002-08-01
期刊: IMMUNITY
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期刊: Journal of immunology (Baltimore, Md. : 1950)
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