Specific migratory dendritic cells rapidly transport antigen from the airways to the thoracic lymph nodes.

Specific migratory dendritic cells rapidly transport antigen from the airways to the thoracic lymph nodes.
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特异性迁移的树突状细胞从气道迅速将抗原转移到胸腔淋巴结。

DOI:
10.1084/jem.193.1.51
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发表时间:
2001-01-01
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Pauwels RA
Pauwels RA
中科院分区:
其他
文献类型:
--
作者:
Vermaelen KY;Carro-Muino I;Lambrecht BN;Pauwels RA

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通过气管内滴注异硫氰酸荧光素(FITC)结合的大分子,研究了抗原从气道粘膜向胸淋巴结(TLNs)的转运。滴注后,在TLN T细胞区域深处发现具有星状形态的FITC+细胞。使用流式细胞术,FITC信号仅在CD 11 cmed-hi/主要组织相容性复合物II类(MHCII)hi细胞中检测到,代表迁移性气道衍生的淋巴结树突状细胞(AW-LNDCs)。在淋巴细胞和含有CD 8 αhi亚群的CD 11 chiMHCIImed DC组(非气道来源的[NAW]-LNDC)中无FITC信号蓄积。分选的AW-LNDCs显示长的MHCIIbright胞质突起和胞质内的FITC+颗粒。FITC+ AW-LNDCs的分数在24小时后达到峰值,并在第7天达到基线。在胸苷激酶转基因小鼠中,更昔洛韦治疗7天可使AW-LNDCs耗尽,导致FITC-大分子转运到TLNs中的强烈减少。与肺内DCs相比,AW-LNDC具有成熟的表型,并上调MHCII、B7-2、CD 40和细胞内粘附分子(ICAM)-1的水平。此外,来自FITC-卵清蛋白(OVA)-滴注动物的分选的AW-LNDCs强烈地将OVA呈递给OVA-TCR转基因T细胞。这些结果证实了气道DC的独特哨兵作用,在气道中拾取抗原并将其以免疫原性形式递送至TLN中的T细胞。
Antigen transport from the airway mucosa to the thoracic lymph nodes (TLNs) was studied in vivo by intratracheal instillation of fluorescein isothiocyanate (FITC)-conjugated macromolecules. After instillation, FITC+ cells with stellate morphology were found deep in the TLN T cell area. Using flow cytometry, an FITC signal was exclusively detected in CD11cmed-hi/major histocompatibility complex class II (MHCII)hi cells, representing migratory airway-derived lymph node dendritic cells (AW-LNDCs). No FITC signal accumulated in lymphocytes and in a CD11chiMHCIImed DC group containing a CD8αhi subset (non–airway-derived [NAW]-LNDCs). Sorted AW-LNDCs showed long MHCIIbright cytoplasmic processes and intracytoplasmatic FITC+ granules. The fraction of FITC+ AW-LNDCs peaked after 24 h and had reached baseline by day 7. AW-LNDCs were depleted by 7 d of ganciclovir treatment in thymidine kinase transgenic mice, resulting in a strong reduction of FITC-macromolecule transport into the TLNs. Compared with intrapulmonary DCs, AW-LNDCs had a mature phenotype and upregulated levels of MHCII, B7-2, CD40, and intracellular adhesion molecule (ICAM)-1. In addition, sorted AW-LNDCs from FITC-ovalbumin (OVA)–instilled animals strongly presented OVA to OVA-TCR transgenic T cells. These results validate the unique sentinel role of airway DCs, picking up antigen in the airways and delivering it in an immunogenic form to the T cells in the TLNs.
DOI: 10.1182/blood.v96.5.1865.h8001865_1865_1872
发表时间: 2000-09-01
期刊: BLOOD
影响因子: 20.3
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发表时间: 2000-08-01
影响因子: 15.9
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期刊: The Journal of experimental medicine
影响因子: --
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DOI: 10.1023/a:1018887501927
发表时间: 1999-05-01
影响因子: 3.7
作者:
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通讯作者: Lehr, CM