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在精神分裂症中改变了Rbfox1-Vamp1通路和前额叶皮层功能障碍
Youjin Chung1, Samuel J Dienel1,2, Matthew J Belch1
1Translational Neuroscience Program, Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA.
Molecular psychiatry
|January 25, 2024
概括
精神分裂症与脑细胞中较低的Rbfox1蛋白和Vamp1mRNA有关,损害皮质抑制和马振荡. 这表明Rbfox1-Vamp1通路有助于精神分裂症.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 精神病学是一个精神病学.
背景情况:
- 在精神分裂症中观察到前额叶皮层 (PFC) 缺陷的马振荡,这与帕瓦胺表达内部神经元 (PVIs) 的抑制驱动力受损有关.
- 结合RNA的狐-1同源1 (Rbfox1) 调节PVI抑制驱动,其细胞质异型影响目标mRNA的稳定性,包括囊泡相关膜蛋白1 (Vamp1).
- Vamp1调解了从PVI释放GABA的概率,而Rbfox1的损失减少了Vamp1,损害了皮层抑制.
研究的目的:
- 研究精神分裂症患者的PFC中PVI内的Rbfox1-Vamp1通路的变化.
- 通过计算建模来确定这些变化对马振荡的功能影响.
主要方法:
- 在20对匹配的精神分裂症和比较试验对象的PFC组织上使用多标签的in situ杂交和免疫组织化学.
- 细胞质Rbfox1蛋白和Vamp1mRNA水平在PVI中得到量化.
- 一个计算网络模型模拟了减少GABA释放概率对马功率的影响.
主要成果:
- 在精神分裂症患者的PVI中发现了显著较低的细胞质Rbfox1蛋白水平.
- 在精神分裂症PVI中,Vamp1mRNA水平也显著降低,与Rbfox1蛋白水平相关.
- 计算模拟表明,减少GABA释放概率会通过破坏网络同步来降低玛功率.
结论:
- 在PVI中Rbfox1-Vamp1通路在精神分裂症中受损.
- 这种损伤可能导致在疾病中观察到的缺陷PFC马振荡.
- 这些发现突出了一个新的分子机制,它是精神分裂症认知缺陷的基础.
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