刺激Wnt信号揭示了对人类主要神经祖先基因调节的上下文依赖的遗传效应
Nana Matoba1,2, Brandon D Le1,2, Jordan M Valone1,2
1Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Nature neuroscience
|September 30, 2024
概括
在神经祖先中激活Wnt通路揭示了与大脑特征相关的隐藏基因调节. 这一发现提高了对神经发育和相关疾病的遗传影响的理解.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
背景情况:
- 检测大脑特征的非编码位置的基因调节效应是具有挑战性的,这是由于特定于上下文的变异功能.
- 了解依赖上下文的基因调节对于破译对大脑发育和疾病的遗传贡献至关重要.
研究的目的:
- 通过激活人类神经祖先的正规Wnt途径来研究上下文依赖的基因调控.
- 确定Wnt-响应的调节元件及其相关的遗传变异,影响与大脑相关的特征.
主要方法:
- 主要的人类神经前代 (n=82个捐赠者) 用于测量染色质可访问性和基因表达.
- 在正规Wnt通路激活后,分析了染色质可访问性和基因表达.
- 在Wnt响应元素中对TCF/LEF动机和特征相关变体进行了丰富分析.
主要成果:
- Wnt通路刺激显著增加了对基因受影响的调节元件 (66%) 和基因 (53%) 的检测.
- 在Wnt通路激活时,确定了397个用于基因调节的调节元件.
- 对分子和复杂的大脑特征的共同遗传效应在刺激后增加了高达70%.
结论:
- 激活Wnt通路是一种强大的方法,用于发现神经前中的上下文依赖基因调节.
- 发现的基因受影响的调节元素在人类血统中积极选择的区域中得到了丰富.
- 研究结果表明,神经发育模式中的遗传变异功能有助于成人大脑结构和行为变异.
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