Neuronal BIN1 Regulates Presynaptic Neurotransmitter Release and Memory Consolidation.
Cell Rep
; 30(10): 3520-3535.e7, 2020 03 10.
Article
em En
| MEDLINE
| ID: mdl-32160554
ABSTRACT
BIN1, a member of the BAR adaptor protein family, is a significant late-onset Alzheimer disease risk factor. Here, we investigate BIN1 function in the brain using conditional knockout (cKO) models. Loss of neuronal Bin1 expression results in the select impairment of spatial learning and memory. Examination of hippocampal CA1 excitatory synapses reveals a deficit in presynaptic release probability and slower depletion of neurotransmitters during repetitive stimulation, suggesting altered vesicle dynamics in Bin1 cKO mice. Super-resolution and immunoelectron microscopy localizes BIN1 to presynaptic sites in excitatory synapses. Bin1 cKO significantly reduces synapse density and alters presynaptic active zone protein cluster formation. Finally, 3D electron microscopy reconstruction analysis uncovers a significant increase in docked and reserve pools of synaptic vesicles at hippocampal synapses in Bin1 cKO mice. Our results demonstrate a non-redundant role for BIN1 in presynaptic regulation, thus providing significant insights into the fundamental function of BIN1 in synaptic physiology relevant to Alzheimer disease.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Terminações Pré-Sinápticas
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Neurotransmissores
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Proteínas Supressoras de Tumor
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Proteínas Adaptadoras de Transdução de Sinal
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Consolidação da Memória
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Proteínas do Tecido Nervoso
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Neurônios
Tipo de estudo:
Prognostic_studies
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Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Cell Rep
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Estados Unidos