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首页> 外文期刊>Neuron >A role for Runx transcription factor signaling in dorsal root ganglion sensory neuron diversification.
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A role for Runx transcription factor signaling in dorsal root ganglion sensory neuron diversification.

机译:Runx转录因子信号传导在背根神经节感觉神经元多样化中的作用。

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摘要

Subpopulations of sensory neurons in the dorsal root ganglion (DRG) can be characterized on the basis of sensory modalities that convey distinct peripheral stimuli, but the molecular mechanisms that underlie sensory neuronal diversification remain unclear. Here, we have used genetic manipulations in the mouse embryo to examine how Runx transcription factor signaling controls the acquisition of distinct DRG neuronal subtype identities. Runx3 acts to diversify an Ngn1-independent neuronal cohort by promoting the differentiation of proprioceptive sensory neurons through erosion of TrkB expression in prospective TrkC+ sensory neurons. In contrast, Runx1 controls neuronal diversification within Ngn1-dependent TrkA+ neurons by repression of neuropeptide CGRP expression and controlling the fine pattern of laminar termination in the dorsal spinal cord. Together, our findings suggest that Runx transcription factor signaling plays a key role in sensory neuron diversification.
机译:背根神经节(DRG)中的感觉神经元亚群可以基于传达独特的外周刺激的感觉方式来表征,但尚不清楚感觉神经元多样化基础的分子机制。在这里,我们已经在小鼠胚胎中使用遗传操纵来检查Runx转录因子信号传导如何控制不同DRG神经元亚型身份的获得。 Runx3通过促进前瞻性TrkC +感觉神经元中TrkB表达的侵蚀来促进本体感受性感觉神经元的分化,从而使Ngn1独立神经元队列多样化。相比之下,Runx1通过抑制神经肽CGRP表达并控制脊髓背层的精细模式来控制Ngn1依赖性TrkA +神经元内的神经元多样化。在一起,我们的研究结果表明Runx转录因子信号传导在感觉神经元的多样化中发挥关键作用。

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