Impaired cerebellar Purkinje cell potentiation generates unstable spatial map orientation and inaccurate navigation

Julie Marie Lefort, Jean Vincent, Lucille Tallot, Frédéric Jarlier, Chris Innocentius De Zeeuw, Laure Rondi-Reig, Christelle Rochefort

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Abstract

Cerebellar activity supported by PKC-dependent long-term depression in Purkinje cells (PCs) is involved in the stabilization of self-motion based hippocampal representation, but the existence of cerebellar processes underlying integration of allocentric cues remains unclear. Using mutant-mice lacking PP2B in PCs (L7-PP2B mice) we here assess the role of PP2B-dependent PC potentiation in hippocampal representation and spatial navigation. L7-PP2B mice display higher susceptibility to spatial map instability relative to the allocentric cue and impaired allocentric as well as self-motion goal-directed navigation. These results indicate that PP2B-dependent potentiation in PCs contributes to maintain a stable hippocampal representation of a familiar environment in an allocentric reference frame as well as to support optimal trajectory toward a goal during navigation.

Original languageEnglish
Pages (from-to)2251
JournalNature Communications
Volume10
Issue number1
DOIs
Publication statusPublished - 21 May 2019

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