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前带带皮层相关的功能性超连接性是Grin2b突变小鼠感官过敏的基础

Soowon Lee^1,2, Won Beom Jung^3,4, Heera Moon⁵

¹Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea.

Molecular psychiatry

|May 4, 2024

概括

GluN2B中的突变与自闭症谱系障碍 (ASD) 有关. 在小鼠中,这些突变会导致感官过敏和异常的大脑连接,特别是在前带皮层 (ACC).

科学领域:

神经科学是一个神经科学.
遗传学遗传学是一种遗传学.

背景情况:

感官异常影响约90%的自闭症谱系障碍 (ASD) 患者,但其机制尚不清楚.
NMDA受体子单元GluN2B与ASD有关,但其在感官功能障碍中的作用尚不清楚.

研究的目的:

调查GRIN2B突变是否会导致自闭症谱系障碍 (ASD) 的感官异常和改变大脑连接.
探索前带状皮质 (ACC) 在调解这些效应中的作用.

主要方法:

使用了Grin2b突变小鼠,包括那些患有患者衍生的C456Y突变的小鼠.
使用机械,热和电刺激评估感官过敏.
采用c-fos和功能磁共振成像 (fMRI) 来分析大脑活动和连接,专注于ACC.
研究了ACC金字塔神经元中的突触传播.
使用化学遗传学来抑制ACC金字塔神经元.

主要成果:

格林2b突变小鼠表现出行为感官过敏和大脑过度连接,以ACC为中心.
该ACC显示过度活跃,并增加了与其他大脑区域的连接.
ACC金字塔神经元显示了增强的激发性突触传输.
抑制ACC金字塔神经元使ACC超连接性和感官过敏性正常化.

结论:

在自闭症谱系障碍 (ASD) 的背景下,GluN2B在调节皮质连接和感官处理方面发挥着关键作用.
前带状皮质 (ACC) 是一个关键区域,参与调解与GRIN2B突变相关的感官异常.

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