在现场测序的整个皮层揭示了依赖输入的区域特征
Xiaoyin Chen1, Stephan Fischer2, Mara C P Rue3
1Allen Institute for Brain Science, Seattle, WA, USA. xiaoyin.chen@alleninstitute.org.
Nature
|April 24, 2024
概括
这项研究使用BARseq绘制了大脑的分子架构图,揭示了神经元转录组签名预测皮质区域的身份和连接. 视觉皮层的发展是由外围输入形成的,突出显示BARseq
科学领域:
- 神经科学
- 分子生物学
- 基因组学
背景情况:
- 大脑皮层具有独特的细胞架构,连接性和活动的专门区域,组织成模块化网络.
- 了解神经元转录组签名如何与空间组织保持一致并随着时间的推移而发展仍然是神经科学的一个关键挑战.
研究的目的:
- 研究大脑中神经元基因表达,皮质区域认同和模块化网络组织之间的关系.
- 探索皮层神经元中转录组签名的发展机制,特别是外围输入的作用.
主要方法:
- 使用BARseq,一种高通量现场测序技术,分析9个小鼠前脑半球超过400万个皮质神经元中的104个细胞类型标记基因的表达.
- 进行基因表达数据的 de novo 聚类,以确定转录组型,并评估新生儿双眼化后的细胞类型分布.
主要成果:
- 识别的转录组型与先前的单细胞RNA测序研究一致,并且对皮质区域特征具有高度预测性.
- 具有相似的转录组合的皮质区域形成"皮质模块",与高度连接的区域重叠,表明共享的模块化组织.
- 新生儿双眼化导致视觉区域转录形状向同一模块内的邻近区域转移,这表明外围输入改进了转录形状.
结论:
- 这项研究表明,现场大规模测序可以揭示大脑的分子结构和发育过程.
- 神经转录组签名在空间上有组织,反映了大脑皮层中的功能模块化和连接性.
- 在发育过程中,外周感官输入在塑造皮层区域的独特转录组特征中起着至关重要的作用.
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