Maturation of Cerebellar Purkinje Cell Population Activity during Postnatal Refinement of Climbing Fiber Network

Jean Marc Good, Michael Mahoney, Taisuke Miyazaki, Kenji F. Tanaka, Kenji Sakimura, Masahiko Watanabe, Kazuo Kitamura, Masanobu Kano

研究成果: Article

6 引用 (Scopus)

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Neural circuits undergo massive refinements during postnatal development. In the developing cerebellum, the climbing fiber (CF) to Purkinje cell (PC) network is drastically reshaped by eliminating early-formed redundant CF to PC synapses. To investigate the impact of CF network refinement on PC population activity during postnatal development, we monitored spontaneous CF responses in neighboring PCs and the activity of populations of nearby CF terminals using in vivo two-photon calcium imaging. Population activity is highly synchronized in newborn mice, and the degree of synchrony gradually declines during the first postnatal week in PCs and, to a lesser extent, in CF terminals. Knockout mice lacking P/Q-type voltage-gated calcium channel or glutamate receptor δ2, in which CF network refinement is severely impaired, exhibit an abnormally high level of synchrony in PC population activity. These results suggest that CF network refinement is a structural basis for developmental desynchronization and maturation of PC population activity. In the cerebellum, the climbing fiber to Purkinje cell network is extensively remodeled during postnatal development. Good et al. show that in vivo population activity of Purkinje cells in response to climbing fiber synaptic inputs is highly synchronized in newborn mice and massively desynchronized due to climbing fiber network refinement.

元の言語English
ページ(範囲)2066-2073
ページ数8
ジャーナルCell Reports
21
発行部数8
DOI
出版物ステータスPublished - 2017 11 21

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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    Good, J. M., Mahoney, M., Miyazaki, T., Tanaka, K. F., Sakimura, K., Watanabe, M., Kitamura, K., & Kano, M. (2017). Maturation of Cerebellar Purkinje Cell Population Activity during Postnatal Refinement of Climbing Fiber Network. Cell Reports, 21(8), 2066-2073. https://doi.org/10.1016/j.celrep.2017.10.101