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• W2771463760 abstract "While Munc18-1 interacts with Syntaxin1 and controls the formation of soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNARE) complex to regulate presynaptic vesicle fusion in developed neurons, this molecule is likely to be involved in brain development since its gene abnormalities cause early infantile epileptic encephalopathy with suppression-burst (Ohtahara syndrome), neonatal epileptic encephalopathy and other neurodevelopmental disorders. We thus analyzed physiological significance of Munc18-1 during cortical development. Munc18-1-knockdown impaired cortical neuron positioning during mouse corticogenesis. Time-lapse imaging revealed that the mispositioning was attributable to defects in radial migration in the intermediate zone and cortical plate. Notably, Syntaxin1A was critical for radial migration downstream of Munc18-1. As for the underlying mechanism, Munc18-1-knockdown in cortical neurons hampered post-Golgi vesicle trafficking and subsequent vesicle fusion at the plasma membrane in vivo and in vitro, respectively. Notably, Syntaxin1A-silencing did not affect the post-Golgi vesicle trafficking. Taken together, Munc18-1 was suggested to regulate radial migration by modulating not only vesicle fusion at the plasma membrane to distribute various proteins on the cell surface for interaction with radial fibers, but also preceding vesicle transport from Golgi to the plasma membrane. Although knockdown experiments suggested that Syntaxin1A does not participate in the vesicle trafficking, it was supposed to regulate subsequent vesicle fusion under the control of Munc18-1. These observations may shed light on the mechanism governing radial migration of cortical neurons. Disruption of Munc18-1 function may result in the abnormal corticogenesis, leading to neurodevelopmental disorders with MUNC18-1 gene abnormalities." @default.
• W2771463760 created "2017-12-22" @default.
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• W2771463760 date "2017-11-30" @default.
• W2771463760 modified "2023-10-17" @default.
• W2771463760 title "MUNC18–1 gene abnormalities are involved in neurodevelopmental disorders through defective cortical architecture during brain development" @default.
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• W2771463760 doi "https://doi.org/10.1186/s40478-017-0498-5" @default.
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