Conserved miR-8/miR-200 defines a glial niche that controls neuroepithelial expansion and neuroblast transition.
Conserved miR-8/miR-200 defines a glial niche that controls neuroepithelial expansion and neuroblast transition.
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DOI:
10.1016/j.devcel.2013.09.018
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发表时间:
2013-10-28
影响因子:
11.8
通讯作者:
Dominguez, Maria
中科院分区:
文献类型:
--
作者:
Morante, Javier;Vallejo, Diana M.;Desplan, Claude;Dominguez, Maria
Neuroepithelial cell proliferation must be carefully balanced with the transition to neuroblast (neural stem cell) to control neurogenesis. Here, we show that loss of the Drosophila microRNA mir-8 (the homolog of vertebrate miR-200 family) results in both excess proliferation and ectopic neuroblast transition. Unexpectedly, mir-8 is expressed in a subpopulation of optic-lobe-associated cortex glia that extend processes that ensheath the neuroepithelium, suggesting that glia cells communicate with the neuroepithelium. We provide evidence that miR-8-positive glia express Spitz, a transforming growth factor α (TGF-α)-like ligand that triggers epidermal growth factor receptor (EGFR) activation to promote neuroepithelial proliferation and neuroblast formation. Further, our experiments suggest that miR-8 ensures both a correct glial architecture and the spatiotemporal control of Spitz protein synthesis via direct binding to Spitz 3′ UTR. Together, these results establish glial-derived cues as key regulatory elements in the control of neuroepithelial cell proliferation and the neuroblast transition.
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影响因子:
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作者:
Egger B;Boone JQ;Stevens NR;Brand AH;Doe CQ
通讯作者:
Doe CQ
影响因子:
64.8
作者:
IkeshimaKataoka, H;Skeath, JB;Matsuzaki, F
通讯作者:
Matsuzaki, F
影响因子:
64.5
作者:
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通讯作者:
Heberlein, U
影响因子:
64.5
作者:
Freeman, M
通讯作者:
Freeman, M
DOI:
10.1126/stke.2202004pl6
发表时间:
2004-02-12
期刊:
Science's STKE : signal transduction knowledge environment
影响因子:
--
作者:
McGuire, Sean E;Mao, Zhengmei;Davis, Ronald L
通讯作者:
Davis, Ronald L