经验依赖性,性二态的突触连接性,由性别特异的阴林表达定义
Chien-Po Liao1, Maryam Majeed1, Oliver Hobert1
1Department of Biological Sciences, Columbia University, Howard Hughes Medical Institute, New York, NY 10027, USA.
Science advances
|November 13, 2024
概括
在雄性虫中,幼年早期的饥饿会改变大脑的电线. 这种经历,由血清素和CREB介导,在成人神经系统中建立持久的性二态突触连接.
科学领域:
- 神经科学是一个神经科学.
- 发育生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 早期的生活经历显著塑造成人大脑功能,通常具有性别特异性的结果.
- 这些长期影响背后的分子机制,特别是建立性二态神经回路的分子机制,仍然在很大程度上是未知的.
研究的目的:
- 阐明青少年经验在成年 *Caenorhabditis elegans* 神经系统中建立性二态突触连接的分子机制.
主要方法:
- 研究了血清素,CREB转录因子和FMI-1/Flamingo/CELSR在调节突触连接中的作用.
- 在C. elegans中利用遗传和分子技术来追踪基因表达和神经元连接.
主要成果:
- 青少年男性的饥饿破坏了PHB感官神经元中依赖于血清素的CREB激活.
- CREB信号控制FMI-1表达,这对PHB-AVA突触连接至关重要.
- 一个特定于性别的调节磁带在男性中对抗FMI-1,从而产生性二态PHB-AVA连接.
结论:
- 青春期的经历,特别是男性的饥饿,通过一种血清素-CREB-LIN-29-FMI-1通路诱导持久的性二态突触连接.
- 这项研究揭示了一个关键的调节节点 (LIN-29) 集成多个因素建立经验依赖性,性别特异的神经回路.
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