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首页> 外文期刊>Neuron >Psychiatric Risk Gene Transcription Factor 4 Regulates Intrinsic Excitability of Prefrontal Neurons via Repression of SCN10a and KCNQ1
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Psychiatric Risk Gene Transcription Factor 4 Regulates Intrinsic Excitability of Prefrontal Neurons via Repression of SCN10a and KCNQ1

机译:精神病风险基因转录因子4通过抑制SCN10a和KCNQ1调节前额神经元的内在兴奋性。

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摘要

Transcription Factor 4 (TCF4) is a clinically pleiotropic gene associated with schizophrenia and Pitt-Hopkins syndrome (PTHS). To gain insight about the neurobiology of TCF4, we created an in vivo model of PTHS by suppressing Tcf4 expression in rat prefrontal neurons immediately prior to neurogenesis. This cell-autonomous genetic insult attenuated neuronal spiking by increasing the after-hyperpolarization. At the molecular level, using a novel technique called iTRAP that combined in utero electroporation and translating ribosome affinity purification, we identified increased translation of two ion channel genes, Kcnq1 and Scn10a. These ion channel candidates were validated by pharmacological rescue and molecular phenocopy. Remarkably, similar excitability deficits were observed in prefrontal neurons from a Tcf4(+/tr) mouse model of PTHS. Thus, we identify TCF4 as a regulator of neuronal intrinsic excitability in part by repression of Kcnq1 and Scn10a and suggest that this molecular function may underlie pathophysiology associated with neuropsychiatric disorders.
机译:转录因子4(TCF4)是一种与精神分裂症和皮特-霍普金斯综合征(PTHS)相关的临床多效性基因。为了获得有关TCF4的神经生物学的见识,我们通过在神经发生之前立即抑制大鼠前额神经元中的Tcf4表达来创建PTHS的体内模型。这种细胞自主遗传损伤通过增加超极化后减弱了神经元突增。在分子水平上,使用一种称为iTRAP的新技术,该技术结合了子宫电穿孔和核糖体亲和纯化的翻译,我们确定了两个离子通道基因Kcnq1和Scn10a的翻译增加。这些候选离子通道通过药理挽救和分子表型验证。值得注意的是,从PTHS的Tcf4(+ / tr)小鼠模型的前额神经元中观察到了类似的兴奋性缺陷。因此,我们通过抑制Kcnq1和Scn10a来确定TCF4是神经元内在兴奋性的调节剂,并暗示该分子功能可能是与神经精神疾病相关的病理生理的基础。

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