Evidence for novel transient cell clusters in the neonatal mouse retina

Evidence for novel transient cell clusters in the neonatal mouse retina
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新生小鼠视网膜中新型瞬时细胞簇的证据

DOI:
10.1101/2019.12.27.888792
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发表时间:
2019
期刊:
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影响因子:
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通讯作者:
De Montigny J
De Montigny J
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作者:
De Montigny J

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自发活动波扫过新生小鼠视网膜神经节细胞(RGC)层,由出生后0-10天(P)的胆碱能星状无长突细胞直接相互连接驱动,随后由双极细胞驱动波。我们发现在胆碱能波期间,自发荧光细胞在RGC层的瞬态集群。它们出现在P2的视神经乳头周围,并在P2-8之间逐渐向外周移位,然后消失。全视网膜多电极阵列记录显示,胆碱能波的起源遵循类似的,非随机的发展中心到周边的模式。电成像揭示了在波源附近发生的偶极电活动的热点。我们建议,这些活动热点的网站波的启动,可能源于短暂的细胞簇,让人想起活动的瞬态subplate神经元在发展中的皮层,这表明一个普遍的超兴奋性机制,在发展中的中枢神经系统网络在关键时期的大脑布线。
Waves of spontaneous activity sweep across the neonatal mouse retinal ganglion cell (RGC) layer, driven by directly interconnected cholinergic starburst amacrine cells from postnatal day (P) 0-10, followed by waves driven by glutamatergic bipolar cells. We found transient clusters of auto-fluorescent cells in the RGC layer during the period of cholinergic waves. They appear around the optic nerve head at P2 and become gradually displaced towards the periphery between P2-8 and then they disappear. Pan-retinal multielectrode array recordings reveal that cholinergic wave origins follow a similar, non-random developmental center-to-periphery pattern. Electrical imaging unmasks hotspots of dipole electrical activity occurring in the vicinity of wave origins. We propose that these activity hotspots are the sites for wave initiation and may originate from the transient cell clusters, reminiscent of activity in transient subplate neurons in the developing cortex, suggesting a universal hyper-excitability mechanism in developing CNS networks during the critical period for brain wiring.
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