灵长类动物特异的神经电路形成的分子架构
Tomomi Shimogori1, Kohei Onishi1, Takafumi Hoshino2
1Molecular Mechanisms of Brain Development, Center for Brain Science (CBS), RIKEN.
Research square
|April 2, 2024
概括
空间转录学揭示了在正在发育的小黄蜂皮层中独特的基因表达模式,特别是前额叶皮层 (PFC) 中的轴突引导分子. PRSS12在鱼和人类PFC发育中显示保存表达.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 基因组学就是基因组学.
背景情况:
- 灵长类动物特异的神经回路的形成在分子层面上仍然不太清楚.
- 哺乳动物皮质,特别是灵长类大脑,表现出复杂的电路,需要详细的分子研究.
研究的目的:
- 通过空间转录学来研究马尔莫塞特皮层发育期间的基因表达动态.
- 确定分子机制,包括轴突引导分子,是灵长类动物特异性神经电路形成的基础.
- 为了比较海和人类之间的发育基因表达模式.
主要方法:
- 空间转录组学被用来分析在正在发育的鸟皮质中的基因表达.
- 对不同皮层区域,发育时间点和性别进行了差异性基因表达分析.
- 功能分析涉及在小鼠模型中候选基因 (PRSS12) 的异位表达,以评估对神经连接性的影响.
主要成果:
- 空间转录学确定了在正在发育的海皮层中在性,空间和时间上差异地表达的基因.
- 通过视觉皮层观察到动态基因表达变化.
- 在正在发育的马尔莫塞特前额叶皮质 (PFC) 中发现了许多具有独特时空表达模式的轴突引导分子,影响PFC神经回路.
- 在小鼠中,PRSS12的子宫外表达模仿了海的皮质连接性变化.
- 在马尔莫塞特和人类PFC发育中,PRSS12表现出保守的表达模式.
结论:
- 发育中的PFC中轴突引导分子的差异表达有助于灵长类动物特有的电路形成.
- PRSS12是参与灵长类PFC发育的关键分子,在大猩猩和人类中保留了作用.
- 空间转录学是一个强大的工具,用于剖析大脑发育的分子机制.
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