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在视觉皮层中,经验依赖的Otx2同源蛋白的转移激活了产后可塑性

Sayaka Sugiyama¹, Ariel A Di Nardo, Shinichi Aizawa

¹Lab for Neuronal Circuit Development, RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.

|August 12, 2008

概括

视觉体验通过调节蛋白 (PV) 细胞网络来塑造神经回路. 经过经验传递的Otx2同源蛋白控制视觉皮层可塑性的关键时期时间.

科学领域:

神经科学是一个神经科学.
发育生物学发展生物学
视觉系统研究视觉系统研究

背景情况:

神经回路,特别是在视觉皮层,经历了由早期生活经历影响的关键发展时期.
GABAergic连接在调节这些可塑性窗口的时间方面发挥着至关重要的作用,这对于建立视力敏度至关重要.

研究的目的:

为了研究Otx2同源蛋白在帕瓦胺 (PV) 细胞网络成熟中的作用.
确定视觉体验如何影响Otx2水平和光伏电池网络发展.
阐明Otx2调节视觉皮层可塑性关键时期的机制.

主要方法:

研究了视觉皮层内的PV细胞中Otx2同源蛋白的表达和定位.
利用条件基因操纵从特定细胞群 (PV细胞和非PV细胞) 和视觉通路中去除Otx2.
通过皮质输液给出外源Otx2以评估其对PV细胞发育和关键期时间的影响.

主要成果:

光伏电池网络的成熟,控制可塑性开始,由Otx2再表达调节.
视觉体验以非细胞自主的方式促进光伏电池中的Otx2积累.
外源Otx2加速了光伏电池的发展和关键时期的时间,而其去除取消了可塑性.

结论:

经验依赖的Otx2同源蛋白的转移是神经回路中调节产后可塑性的关键机制.
Otx2在建立视觉皮层中关键时期可塑性所需的生理环境方面起着至关重要的作用.
这项研究突出了经验驱动电路成熟和可塑性的新途径.

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