In vivo depletion of lung CD11c+ dendritic cells during allergen challenge abrogates the characteristic features of asthma.

In vivo depletion of lung CD11c+ dendritic cells during allergen challenge abrogates the characteristic features of asthma.
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过敏原激发期间肺 CD11c+ 树突状细胞的体内耗竭消除了哮喘的特征。

DOI:
10.1084/jem.20042311
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发表时间:
2005-03-21
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Lambrecht BN
Lambrecht BN
中科院分区:
其他
文献类型:
--
作者:
van Rijt LS;Jung S;Kleinjan A;Vos N;Willart M;Duez C;Hoogsteden HC;Lambrecht BN

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虽然树突状细胞(DCs)在致敏吸入性过敏原中发挥重要作用,但其在辅助性T细胞(Th)2介导的嗜酸性粒细胞气道炎症中的作用目前尚不清楚。在这里,我们显示在卵清蛋白(OVA)驱动的小鼠哮喘模型,气道树突状细胞获得一个成熟的表型,并与支气管周围和血管周围炎症部位的CD 4 + T细胞相互作用。为了研究DCs是否对炎症有贡献,我们在OVA气溶胶激发期间从CD 11 c-白喉毒素(DT)受体转基因小鼠的气道中耗尽DCs。DT的气道给药耗尽CD 11 c + DCs和肺泡巨噬细胞,并消除了哮喘的特征,包括嗜酸性粒细胞炎症,杯状细胞增生和支气管高反应性。在不存在CD 11 c+细胞的情况下,内源性或过继转移的CD 4 + Th 2细胞不产生白细胞介素(IL)-4,IL-5和IL-13响应于OVA气雾剂。在CD 11 c缺失的小鼠中,嗜酸性粒细胞炎症和Th 2细胞因子分泌通过过继转移CD 11 c + DCs而恢复,但肺泡巨噬细胞不能。这些发现确定了肺DCs作为关键的促炎细胞,其在持续的气道炎症期间对于Th 2细胞刺激是必要的和足够的。
Although dendritic cells (DCs) play an important role in sensitization to inhaled allergens, their function in ongoing T helper (Th)2 cell–mediated eosinophilic airway inflammation underlying bronchial asthma is currently unknown. Here, we show in an ovalbumin (OVA)-driven murine asthma model that airway DCs acquire a mature phenotype and interact with CD4+ T cells within sites of peribronchial and perivascular inflammation. To study whether DCs contributed to inflammation, we depleted DCs from the airways of CD11c-diphtheria toxin (DT) receptor transgenic mice during the OVA aerosol challenge. Airway administration of DT depleted CD11c+ DCs and alveolar macrophages and abolished the characteristic features of asthma, including eosinophilic inflammation, goblet cell hyperplasia, and bronchial hyperreactivity. In the absence of CD11c+ cells, endogenous or adoptively transferred CD4+ Th2 cells did not produce interleukin (IL)-4, IL-5, and IL-13 in response to OVA aerosol. In CD11c-depleted mice, eosinophilic inflammation and Th2 cytokine secretion were restored by adoptive transfer of CD11c+ DCs, but not alveolar macrophages. These findings identify lung DCs as key proinflammatory cells that are necessary and sufficient for Th2 cell stimulation during ongoing airway inflammation.
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