A discrete subpopulation of dendritic cells transports apoptotic intestinal epithelial cells to T cell areas of mesenteric lymph nodes.

A discrete subpopulation of dendritic cells transports apoptotic intestinal epithelial cells to T cell areas of mesenteric lymph nodes.
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DOI:
10.1084/jem.191.3.435
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发表时间:
2000-02-07
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
MacPherson GG
MacPherson GG
中科院分区:
其他
文献类型:
--
作者:
Huang FP;Platt N;Wykes M;Major JR;Powell TJ;Jenkins CD;MacPherson GG

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这项研究确定了一种树突状细胞 (DC) 亚群,该亚群能够将凋亡的肠上皮细胞残余物持续转运至体内肠系膜淋巴结的 T 细胞区域。大鼠肠道淋巴液含有两个 DC 群体。两个群体都具有典型的 DC 形态,是主要组织相容性复合体 IIhi 类,并表达 OX62、CD11c 和 B7。 CD4+/OX41+ DC 是强抗原呈递细胞 (APC)。 CD4−/OX41− DC 是弱 APC,含有细胞质凋亡 DNA、上皮细胞限制性细胞角蛋白和非特异性酯酶 (NSE)+ 包涵体,这些在 OX41+ DC 中未见。相同的 NSE 电泳变异模式存在于 CD4−/OX41− DC、肠上皮细胞和肠系膜淋巴结 DC 中,但不存在于其他 DC 群体、巨噬细胞或组织中。末端脱氧核苷酸转移酶介导的 dUTP-生物素缺口末端标记 (TUNEL) 阳性 DC 和强 NSE+ DC 存在于肠固有层中。派尔氏集结和肠系膜淋巴结(但其他淋巴结除外)在滤泡间和 T 细胞区域含有许多强 NSE+ DC。类似的树突状细胞也存在于限生大鼠的回肠和肠系膜淋巴结的 T 细胞区域中。这些结果表明,一个独特的 DC 亚群组成型内吞凋亡细胞并将其转运至 T 细胞区域,并表明这些 DC 在诱导和维持外周自身耐受方面发挥着作用。
This study identifies a dendritic cell (DC) subset that constitutively transports apoptotic intestinal epithelial cell remnants to T cell areas of mesenteric lymph nodes in vivo. Rat intestinal lymph contains two DC populations. Both populations have typical DC morphology, are major histocompatibility complex class IIhi, and express OX62, CD11c, and B7. CD4+/OX41+ DCs are strong antigen-presenting cells (APCs). CD4−/OX41− DCs are weak APCs and contain cytoplasmic apoptotic DNA, epithelial cell–restricted cytokeratins, and nonspecific esterase (NSE)+ inclusions, not seen in OX41+ DCs. Identical patterns of NSE electrophoretic variants exist in CD4−/OX41− DCs, intestinal epithelial cells, and mesenteric node DCs but not in other DC populations, macrophages, or tissues. Terminal deoxynucleotidyl transferase–mediated dUTP-biotin nick-end labeling (TUNEL)-positive DCs and strongly NSE+ DCs are present in intestinal lamina propria. Peyer's patches and mesenteric but not other lymph nodes contain many strongly NSE+ DCs in interfollicular and T cell areas. Similar DCs are seen in the ileum and in T cell areas of mesenteric nodes in gnotobiotic rats. These results show that a distinct DC subset constitutively endocytoses and transports apoptotic cells to T cell areas and suggest a role for these DCs in inducing and maintaining peripheral self-tolerance.
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影响因子: --
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