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首页> 外文期刊>Neuron >Cas adaptor proteins organize the retinal ganglion cell layer downstream of integrin signaling
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Cas adaptor proteins organize the retinal ganglion cell layer downstream of integrin signaling

机译:Cas衔接蛋白在整联蛋白信号传导下游组织视网膜神经节细胞层

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摘要

Stratification of retinal neuronal cell bodies and lamination of their processes provide a scaffold upon which neural circuits can be built. However, the molecular mechanisms that direct retinal ganglion cells (RGCs) to resolve into a single-cell retinal ganglioncell layer (GCL) are not well understood. The extracellular matrix protein laminin conveys spatial information that instructs the migration, process outgrowth, and reorganization of GCL cells. Here, we show that the β1-Integrin laminin receptor is required for RGC positioning and reorganization into a single-cell GCL layer. β1-Integrin signaling within migrating GCL cells requires Cas signaling-adaptor proteins, and in the absence of β1-Integrin or Cas function retinal neurons form ectopic cell clusters beyond the inner-limiting membrane (ILM), phenocopying laminin mutants. These data reveal an essential role for Cas adaptor proteins in β1-Integrin-mediated signaling events critical for the formation of the single-cell GCL in the mammalian retina.
机译:视网膜神经元细胞体的分层及其过程的分层提供了可以在其上建立神经回路的支架。但是,引导视网膜神经节细胞(RGCs)分解为单细胞视网膜神经节细胞层(GCL)的分子机制尚不清楚。细胞外基质蛋白层粘连蛋白传递空间信息,该信息指示GCL细胞的迁移,过程生长和重组。在这里,我们显示RGC定位和重组为单细胞GCL层需要β1-整合素层粘连蛋白受体。迁移的GCL细胞内的β1-整合素信号传导需要Cas信号传导适配蛋白,在没有β1-整合素或Cas功能的情况下,视网膜神经元会形成内限膜(ILM)以外的异位细胞簇,对层粘连蛋白突变体进行表型复制。这些数据揭示了Cas衔接蛋白在β1-整合素介导的信号转导事件中的重要作用,该信号转导对哺乳动物视网膜中单细胞GCL的形成至关重要。

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