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浦肯野细胞群体和小脑依赖的感觉运动行为的差异时空发育。

Differential spatiotemporal development of Purkinje cell populations and cerebellum-dependent sensorimotor behaviors.

机构信息

Department of Neuroscience, Erasmus MC, Rotterdam, Netherlands.

Princeton Neuroscience Institute, Princeton, United States.

出版信息

Elife. 2021 May 11;10:e63668. doi: 10.7554/eLife.63668.

Abstract

Distinct populations of Purkinje cells (PCs) with unique molecular and connectivity features are at the core of the modular organization of the cerebellum. Previously, we showed that firing activity of PCs differs between ZebrinII-positive and ZebrinII-negative cerebellar modules (Zhou et al., 2014; Wu et al., 2019). Here, we investigate the timing and extent of PC differentiation during development in mice. We found that several features of PCs, including activity levels, dendritic arborization, axonal shape and climbing fiber input, develop differentially between nodular and anterior PC populations. Although all PCs show a particularly rapid development in the second postnatal week, anterior PCs typically have a prolonged physiological and dendritic maturation. In line herewith, younger mice exhibit attenuated anterior-dependent eyeblink conditioning, but faster nodular-dependent compensatory eye movement adaptation. Our results indicate that specific cerebellar regions have unique developmental timelines which match with their related, specific forms of cerebellum-dependent behaviors.

摘要

具有独特分子和连接特征的浦肯野细胞 (PC) 群体是小脑模块化组织的核心。以前,我们发现 ZebrinII 阳性和 ZebrinII 阴性小脑模块中的 PC 放电活动存在差异 (Zhou 等人,2014;Wu 等人,2019)。在这里,我们研究了在发育过程中小鼠 PC 分化的时间和程度。我们发现,PC 的几个特征,包括活动水平、树突分支、轴突形状和 climbing fiber 输入,在结节性和前 PC 群体之间存在差异。尽管所有 PC 在出生后第二周都表现出特别快速的发育,但前 PC 通常具有延长的生理和树突成熟过程。与此一致的是,年幼的小鼠表现出减弱的前依赖眨眼条件反射,但更快的结节依赖的代偿性眼球运动适应。我们的结果表明,特定的小脑区域具有独特的发育时间表,与它们相关的特定形式的小脑依赖行为相匹配。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d8fe/8195607/f103773f7efa/elife-63668-fig1.jpg

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