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- W3106400019 abstract "The schizophrenia-susceptibility gene, dystrobrevin-binding protein 1 (DTNBP1), encodes the dysbindin protein and mediates neurotransmission and neurodevelopment in normal subjects. Functional studies show that DTNBP1 loss may cause deficient presynaptic vesicle transmission, which is related to multiple psychiatric disorders. However, the functional mechanism of dysbindin-mediated synaptic vesicle transmission has not been investigated systematically. In this study, we performed electrophysiological recordings in calyx of Held synapses. We found that excitatory postsynaptic current (EPSC) and miniature EPSC (mEPSC) amplitudes were unchanged in dysbindin-deficient synapses, but readily releasable pool (RRP) size and calcium dependent vesicle replenishment were affected during high-frequency stimulation. Moreover, dysbindin loss accompanied slightly decreases in Munc18-1 and snapin expression levels, which are associated with vesicle priming and synaptic homeostasis under high-frequency stimulation. Together, we inferred that dysbindin directly interacts with Munc18-1 and snapin to mediate calcium dependent RRP replenishment. Dysbindin loss may lead to RRP replenishment dysregulation during high-frequency stimulation, potentially causing cognitive impairment in schizophrenia." @default.
- W3106400019 created "2020-11-23" @default.
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- W3106400019 date "2021-01-01" @default.
- W3106400019 modified "2023-10-15" @default.
- W3106400019 title "Loss of Dysbindin Implicates Synaptic Vesicle Replenishment Dysregulation as a Potential Pathogenic Mechanism in Schizophrenia" @default.
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- W3106400019 doi "https://doi.org/10.1016/j.neuroscience.2020.10.020" @default.
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