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五个与自闭症相关的转录调节器准了与大脑表达的基因相邻的共享位置
Siavash Fazel Darbandi1, Joon-Yong An2, Kenneth Lim1
1Nina Ireland Laboratory of Developmental Neurobiology, University of California, San Francisco, San Francisco, CA 94143, USA; Department of Psychiatry and Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94143, USA.
五个与自闭症谱系障碍 (ASD) 相关的转录调节器 (TRs) 共享结合部位,影响大脑基因表达. 在小鼠中破坏这些TRs揭示了在人类ASD大脑中观察到的融合神经发育效应.
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:
- 自闭症谱系障碍 (ASD) 与遗传因素有关,包括转录调节器 (TRs).
- 了解这些与ASD相关的TRs在大脑发育中的功能至关重要.
研究的目的:
- 在发育中的大脑中确定五个关键的ASD相关TRs (ARID1B,BCL11A,FOXP1,TBR1,TCF7L2) 的监管目标.
- 研究破坏这些TRs的功能融合和神经发育后果.
主要方法:
- 染色体免疫沉降测序 (ChIP-seq) 用于绘制人类和小鼠皮层中的TR结合位点.
- 分析重叠的绑定站点,特别是在促进者地区.
- 在小鼠皮质培养中进行体外CRISPR干扰 (CRISPRi),以研究基因功能.
- 转录基因分析和细胞类型量化 (NeuN+,CALB+,GFAP+).
主要成果:
- 在五个与ASD相关的TR中发现了重要的结合部位重叠,特别是在开放的染色体区域.
- 结合部位在促进体区域内重叠,准确预测大脑表达的基因 (96/102 ASD相关基因).
- 在小鼠皮质培养物中,CRISPRi介导的ARID1B和TBR1的破坏导致神经元细胞减少 (NeuN+,CALB+) 和质细胞增加 (GFAP+),反映了ASD大脑特征.
结论:
- 五个与ASD相关的TRs在大脑发育期间调节基因表达方面表现出功能趋同.
- 这些TRs的干扰导致共享的神经发育结果,有助于ASD病原体.
- 这些发现突出了一个共同的途径,通过TRs的遗传变异可以影响大脑发育和ASD风险.
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