The fusogen EFF-1 controls sculpting of mechanosensory dendrites.

The fusogen EFF-1 controls sculpting of mechanosensory dendrites.
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DOI:
10.1126/science.1189095
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发表时间:
2010-06-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Podbilewicz B
Podbilewicz B
中科院分区:
其他
文献类型:
--
作者:
Oren-Suissa M;Hall DH;Treinin M;Shemer G;Podbilewicz B

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控制神经元树的形成和维持的机制知之甚少。我们研究了两个树状机械感受神经元(PVDs)的动态发展所需的接收强机械刺激秀丽隐杆线虫。PVDs精心制作了由我们称之为“烛台”的结构单元组成的树突树。我们研究了烛台的数量、结构和功能是如何维持的。EFF-1是一种介导细胞融合的重要蛋白质,在PVDs中自主发挥作用,以修剪发育中的闭经。Eff-1突变体显示出高度分枝的、紊乱的绝经。EFF-1在PVD中的过表达减少了分支。神经元修剪似乎涉及EFF-1依赖的分支回缩和神经突-神经突自身融合。因此,EFF-1活动可能作为一个质量控制机制,在造型的树突状树。
The mechanisms controlling the formation and maintenance of neuronal trees are poorly understood. We examined the dynamic development of two arborized mechanoreceptor neurons (PVDs) required for reception of strong mechanical stimuli in Caenorhabditis elegans. The PVDs elaborated dendritic trees comprising structural units we call “menorahs.” We studied how the number, structure, and function of menorahs were maintained. EFF-1, an essential protein mediating cell fusion, acted autonomously in the PVDs to trim developing menorahs. eff-1 mutants displayed hyperbranched, disorganized menorahs. Overexpression of EFF-1 in the PVD reduced branching. Neuronal pruning appeared to involve EFF-1–dependent branch retraction and neurite-neurite autofusion. Thus, EFF-1 activities may act as a quality control mechanism during the sculpting of dendritic trees.
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