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首页> 外文期刊>Neuron >Cell-Autonomous Regulation of Dendrite Self-Avoidance by the Wnt Secretory Factor MIG-14/Wntless
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Cell-Autonomous Regulation of Dendrite Self-Avoidance by the Wnt Secretory Factor MIG-14/Wntless

机译:WNT分泌因子MIG-14 / WNTREST的枝晶自避免细胞自主调节

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摘要

Self-avoidance allows sister dendrites from the same neuron to form non-redundant coverage of the sensory territory and is important for neural circuitry functions. Here, we report an unexpected, cell-autonomous role of the Wnt-secretory factor MIG-14/Wntless in mediating dendrite self-avoidance in theC.?elegansmultidendritic PVD neurons. Similar findings inDrosophilasuggest that this novel function ofWntlessis conserved. Themig-14mutant shows defects in dendrite self-avoidance, and ectopic MIG-14 expression triggers dendrite repulsion. Functions of dendrite self-avoidance and Wnt secretion could be mapped to distinct MIG-14 domains, indicating that these two functions of MIG-14 are genetically separable, consistent with lack of self-avoidance defects in theWntmutants. We further demonstrate that MIG-14 engages Wiskott-Aldrich syndrome protein (WASP)-dependent actin assembly to regulate dendrite self-avoidance. Our work expands the repertoire of self-avoidance molecules and uncovers a previously unknown, Wnt-independent function of MIG-14/Wntless.
机译:自我避免允许来自同一神经元的姐妹树突,形成感官区域的非冗余覆盖,对神经电路功能很重要。在这里,我们报告了WNT - 分泌因子MIG-14 / Wntless的意外,细胞 - 自主作用在介导在thec.?ElegansmultidendriticPVD神经元中的树突自避免时。类似的发现Indroosophilasuggest,这种新功能WnTlessis保守。 Themig-14造成枝晶自避免的缺陷,异位MIG-14表达触发枝晶排斥。枝晶自避免和WNT分泌的功能可以映射到不同的MIG-14结构域,表明MIG-14的这两种功能是遗传可分离的,这与WNT造影中缺乏自我避免的缺陷一致。我们进一步证明MIG-14接合Wiskott-Aldrich综合征蛋白(WASP) - 依赖肌动蛋白组件来调节树突自避免。我们的作品扩展了自我避免分子的曲目,并揭示了以前未知的MIG-14 / WNTREST的WNT独立功能。

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