Adult Langerhans cells derive predominantly from embryonic fetal liver monocytes with a minor contribution of yolk sac-derived macrophages.

Adult Langerhans cells derive predominantly from embryonic fetal liver monocytes with a minor contribution of yolk sac-derived macrophages.
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DOI:
10.1084/jem.20120340
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发表时间:
2012-06-04
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Ginhoux F
Ginhoux F
中科院分区:
其他
文献类型:
--
作者:
Hoeffel G;Wang Y;Greter M;See P;Teo P;Malleret B;Leboeuf M;Low D;Oller G;Almeida F;Choy SH;Grisotto M;Renia L;Conway SJ;Stanley ER;Chan JK;Ng LG;Samokhvalov IM;Merad M;Ginhoux F

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朗格汉斯细胞前体最初来自卵黄囊祖细胞,但后来被胎肝单核细胞取代。朗格汉斯细胞(LC)是表皮的树突状细胞(DC),形成抵抗皮肤病原体的第一造血防线之一。与其他DC相比,LC来自出生前播种皮肤的造血前体。然而,这些胚胎前体的起源仍然不清楚。使用体内谱系追踪,我们确定了第一波卵黄囊(YS)衍生的原始髓系祖细胞,种子的皮肤发生胎儿肝脏造血之前。YS祖细胞迁移到胚胎本身,包括预期的皮肤,在那里它们产生LC前体,和大脑雏形,在那里它们产生小胶质细胞。然而,在相反的小胶质细胞,这仍然是YS起源的整个生命,YS衍生的LC前体在胚胎发育后期在很大程度上被胎肝单核细胞所取代。因此,成人LC主要来源于胎肝单核细胞衍生的细胞,YS衍生的细胞贡献较小。总之,我们确定成人LCs具有双重起源,桥接早期胚胎和晚期胎儿骨髓发育。
Langerhans cell precursors initially arise from yolk sac progenitors, but are later superseded by fetal liver monocytes. Langerhans cells (LCs) are the dendritic cells (DCs) of the epidermis, forming one of the first hematopoietic lines of defense against skin pathogens. In contrast to other DCs, LCs arise from hematopoietic precursors that seed the skin before birth. However, the origin of these embryonic precursors remains unclear. Using in vivo lineage tracing, we identify a first wave of yolk sac (YS)–derived primitive myeloid progenitors that seed the skin before the onset of fetal liver hematopoiesis. YS progenitors migrate to the embryo proper, including the prospective skin, where they give rise to LC precursors, and the brain rudiment, where they give rise to microglial cells. However, in contrast to microglia, which remain of YS origin throughout life, YS-derived LC precursors are largely replaced by fetal liver monocytes during late embryogenesis. Consequently, adult LCs derive predominantly from fetal liver monocyte-derived cells with a minor contribution of YS-derived cells. Altogether, we establish that adult LCs have a dual origin, bridging early embryonic and late fetal myeloid development.
Langerhans细胞(LC)增殖介导了新生儿发育,体内平衡和与表皮LC网络的炎症相关扩张。
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