在22q11.2删除综合征中的突触依赖的发育失联性
F G Alvino1, S Gini1,2, A Minetti3
1Functional Neuroimaging Laboratory, Istituto Italiano di Tecnologia, Center for Neuroscience and Cognitive Systems @UniTn, Rovereto, Italy.
bioRxiv : the preprint server for biology
|April 8, 2024
概括
遗传因素,如染色体22q11.2删除影响神经精神疾病中大脑连接. 这项研究揭示了22q11删除综合征中与年龄相关的大脑网络变化,与突触机制有关.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
背景情况:
- 染色体22q11.2删除是自闭症和精神分裂症的主要遗传风险.
- 在22q11删除综合征 (22q11DS) 中观察到大脑功能连接的改变.
- 这种失联的发展轨迹和生物基础尚未得到充分理解.
研究的目的:
- 使用跨物种方法研究22q11DS中大脑失联的发育过程和神经机制.
- 确定突触和连接性改变的潜在治疗点.
主要方法:
- 在LgDel小鼠 (为22q11DS的模型) 和人类22q11DS载体中利用功能性MRI (fMRI).
- 评估了树突脊柱密度的发育变化.
- 研究了GSK3β抑制对大脑连接和突触改变的影响.
- 在22q11.2删除载体中,与社交行为相关的功能连接性.
主要成果:
- LgDel小鼠表现出特定于年龄的fMRI失联性,从青少年的超连接性转移到青春期后的海马体低连接性.
- 这些连接性变化反映了树突脊柱密度的发育变化.
- 发育性GSK3β抑制暂时使fMRI和突触异常正常化.
- 患有22q11DS的人在与突触和自闭症相关基因丰富的大脑区域中表现出类似的连接性重新配置.
- 在22q11.2删除载体中,体力运动网络的失联性预测了社会赤字.
结论:
- 突触机制在22q11DS.中观察到的发育中介功能性大脑失联中发挥着至关重要的作用.
- 抑制GSK3β是解决这些神经发育变化的潜在治疗途径.
- 这些发现突出了在22q11DS.DS中潜在的大脑网络功能障碍的保存跨物种机制.
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