Cerebellar molecular layer interneurons are dispensable for cued and contextual fear conditioning

Katy L.H. Marshall-Phelps; Gernot Riedel; Peer Wulff; Marta Woloszynowska-Fraser

doi:10.1038/s41598-020-76729-4

Cerebellar molecular layer interneurons are dispensable for cued and contextual fear conditioning

Katy L.H. Marshall-Phelps, Gernot Riedel^*, Peer Wulff^* (Corresponding Author), Marta Woloszynowska-Fraser

^*Corresponding author for this work

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Abstract

Purkinje cells are the only output cell of the cerebellar cortex. Their spatiotemporal activity is controlled by molecular layer interneurons (MLIs) through GABA_A receptor-mediated inhibition. Recently, it has been reported that the cerebellar cortex is required for consolidation of conditioned fear responses during fear memory formation. Although the relevance of MLIs during fear memory formation is currently not known, it has been shown that synapses made between MLIs and Purkinje cells exhibit long term plasticity following fear conditioning. The present study examined the role of cerebellar MLIs in the formation of fear memory using a genetically-altered mouse line (PC-∆γ2) in which GABA_A receptor-mediated signaling at MLI to Purkinje cell synapses was functionally removed. We found that neither acquisition nor recall of fear memories to tone and context were altered after removal of MLI-mediated inhibition.

Original language	English
Article number	20000
Number of pages	9
Journal	Scientific Reports
Volume	10
Issue number	1
DOIs	https://doi.org/10.1038/s41598-020-76729-4
Publication status	Published - 17 Nov 2020

Bibliographical note

Funding Information:
We were supported by the Biotechnology and Biological Sciences Research Council grant BB/H001123/1 (P.W.), the Medical Research Council grants G1100546/2 and G0800399 (P.W.) and the University of Aberdeen (K.L.H.M.-P., M.W.-F., G.R. and P.W.). M.W.F. is currently supported by the Intramural Research Programme at the National Institute of Health, USA.
Open Access funding enabled and organized by Projekt DEAL.

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title = "Cerebellar molecular layer interneurons are dispensable for cued and contextual fear conditioning",

abstract = "Purkinje cells are the only output cell of the cerebellar cortex. Their spatiotemporal activity is controlled by molecular layer interneurons (MLIs) through GABAA receptor-mediated inhibition. Recently, it has been reported that the cerebellar cortex is required for consolidation of conditioned fear responses during fear memory formation. Although the relevance of MLIs during fear memory formation is currently not known, it has been shown that synapses made between MLIs and Purkinje cells exhibit long term plasticity following fear conditioning. The present study examined the role of cerebellar MLIs in the formation of fear memory using a genetically-altered mouse line (PC-∆γ2) in which GABAA receptor-mediated signaling at MLI to Purkinje cell synapses was functionally removed. We found that neither acquisition nor recall of fear memories to tone and context were altered after removal of MLI-mediated inhibition.",

author = "Marshall-Phelps, {Katy L.H.} and Gernot Riedel and Peer Wulff and Marta Woloszynowska-Fraser",

note = "Funding Information: We were supported by the Biotechnology and Biological Sciences Research Council grant BB/H001123/1 (P.W.), the Medical Research Council grants G1100546/2 and G0800399 (P.W.) and the University of Aberdeen (K.L.H.M.-P., M.W.-F., G.R. and P.W.). M.W.F. is currently supported by the Intramural Research Programme at the National Institute of Health, USA. Open Access funding enabled and organized by Projekt DEAL.",

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N1 - Funding Information: We were supported by the Biotechnology and Biological Sciences Research Council grant BB/H001123/1 (P.W.), the Medical Research Council grants G1100546/2 and G0800399 (P.W.) and the University of Aberdeen (K.L.H.M.-P., M.W.-F., G.R. and P.W.). M.W.F. is currently supported by the Intramural Research Programme at the National Institute of Health, USA. Open Access funding enabled and organized by Projekt DEAL.

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N2 - Purkinje cells are the only output cell of the cerebellar cortex. Their spatiotemporal activity is controlled by molecular layer interneurons (MLIs) through GABAA receptor-mediated inhibition. Recently, it has been reported that the cerebellar cortex is required for consolidation of conditioned fear responses during fear memory formation. Although the relevance of MLIs during fear memory formation is currently not known, it has been shown that synapses made between MLIs and Purkinje cells exhibit long term plasticity following fear conditioning. The present study examined the role of cerebellar MLIs in the formation of fear memory using a genetically-altered mouse line (PC-∆γ2) in which GABAA receptor-mediated signaling at MLI to Purkinje cell synapses was functionally removed. We found that neither acquisition nor recall of fear memories to tone and context were altered after removal of MLI-mediated inhibition.

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Cerebellar molecular layer interneurons are dispensable for cued and contextual fear conditioning

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