Dpp signaling determines regional stem cell identity in the regenerating adult Drosophila gastrointestinal tract.

Dpp signaling determines regional stem cell identity in the regenerating adult Drosophila gastrointestinal tract.
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DOI:
10.1016/j.celrep.2013.05.040
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发表时间:
2013-07-11
期刊:
影响因子:
8.8
通讯作者:
Jasper H
Jasper H
中科院分区:
生物学1区
文献类型:
--
作者:
Li H;Qi Y;Jasper H

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胃肠道由一系列上皮细胞组成,这些上皮细胞具有相同的功能要求,但也具有独特的高度专业化的作用。不同群体的体干细胞(SC)再生这些上皮细胞,但机制,保持这些SC的区域身份还没有很好地理解。在这里,我们确定了BMP样Dpp信号通路在果蝇成年胃肠道再生过程多样化中的作用。在后中肠(PM)和中中肠(MM)之间的边界处从肠上皮细胞分泌的Dpp建立了一种形态发生梯度,其选择性地指导MM中的胃SC的铜细胞(CC)再生,从而确定CC区域的大小。在脊椎动物中,BMP信号的失调与Barrett化生有关,其中鳞状食管上皮被柱状上皮取代,表明BMP对区域SC身份的维持是保守的。
The gastrointestinal tract is lined by a series of epithelia that share functional requirements, but also have distinct, highly specialized roles. Distinct populations of somatic stem cells (SCs) regenerate these epithelia, yet the mechanisms that maintain regional identities of these SCs are not well understood. Here, we identify a role for the BMP-like Dpp signaling pathway in diversifying regenerative processes in the adult gastrointestinal tract of Drosophila. Dpp secreted from enterocytes at the boundary between the posterior midgut (PM) and the middle midgut (MM) sets up a morphogen gradient that selectively directs copper cell (CC) regeneration from gastric SCs in the MM and thus determines the size of the CC region. In vertebrates, deregulation of BMP signaling has been associated with Barrett’s metaplasia, where the squamous esophageal epithelium is replaced by a columnar epithelium, suggesting that the maintenance of regional SC identities by BMP is conserved.
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