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Homeostatic Plasticity Shapes Cell-Type-Specific Wiring in the Retina

机译:稳态可塑性在视网膜中塑造细胞型特定布线

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摘要

Convergent input from different presynaptic partners shapes the responses of postsynaptic neurons. Whether developing postsynaptic neurons establish connections with each presynaptic partner independently or balance inputs to attain specific responses is unclear. Retinal ganglion cells (RGCs) receive convergent input from bipolar cell types with different contrast responses and temporal tuning. Here, using optogenetic activation and pharmacogenetic silencing, we found that type 6 bipolar (B6) cells dominate excitatory input to ONa-RGCs. We generated mice in which B6 cells were selectively removed from developing circuits (B6-DTA). In B6-DTA mice, ONa-RGCs adjusted connectivity with other bipolar cells in a cell-type-specific manner. They recruited new partners, increased synapses with some existing partners, and maintained constant input from others. Patch-clamp recordings revealed that anatomical rewiring precisely preserved contrast and temporal frequency response functions of ONa-RGCs, indicating that homeostatic plasticity shapes cell-type-specific wiring in the developing retina to stabilize visual information sent to the brain.
机译:来自不同突触前伴侣的收敛输入塑造了突触后神经元的响应。开发突触后神经元是否独立地与每个突触前伙伴建立联系,或者平衡输入以获得特定反应尚不清楚。视网膜神经节细胞(RGCS)接收来自双极细胞类型的收敛输入,具有不同的对比应答和时间调谐。在此,使用致敏活化和药物发生沉默,我们发现6型双极(B6)细胞将兴奋输入的兴奋性输入调节至ONA-RGC。我们产生了从显影电路(B6-DTA)中选择性地除去B6细胞的小鼠。在B6-DTA小鼠中,ONA-RGCS以特定于细胞类型的方式调整与其他双极细胞的连接。他们招募了新的合作伙伴,增加了一些现有伙伴的突触,并维持了其他人的常量输入。 Patch-Clamp录制揭示了解剖重新加速的ona-RGC的精确保留了对比度和时间频率响应函数,表明稳态可塑性在显影视网膜中塑造细胞型特定的布线,以稳定发送到大脑的视觉信息。

著录项

  • 来源
    《Neuron》 |2017年第3期|共14页
  • 作者单位

    Washington Univ Sch Med Dept Ophthalmol &

    Visual Sci St Louis MO 63110 USA;

    Washington Univ Sch Med Dept Ophthalmol &

    Visual Sci St Louis MO 63110 USA;

    Washington Univ Sch Med Dept Ophthalmol &

    Visual Sci St Louis MO 63110 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经病学;
  • 关键词

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