早期的生活压力会转移关键时期,并导致视觉皮层发育早期
Janet Poplawski1,2, Tony Montina3, Gerlinde A S Metz1
1Canadian Centre for Behavioural Neuroscience, Department of Neuroscience, University of Lethbridge, Lethbridge, AB, Canada.
PloS one
|December 31, 2024
概括
在小鼠中,生命早期的压力 (ELS) 加快视觉皮层的发育,过早地开启和关闭关键时期. 这种神经发育的转变可能会导致长期的功能缺陷,并引入动物研究中的混.
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
- 神经生物学 神经生物学 神经生物学
背景情况:
- 发育中的神经系统在关键时期表现出可塑性,而这种可塑性可能会因不良经历而被破坏.
- 众所周知,生命早期的压力 (ELS) 会影响大脑的发育和功能.
- 感官发育中的关键时期对于建立正常的神经回路至关重要.
研究的目的:
- 为了研究早期生活压力 (ELS) 对小鼠视觉皮层中关键时期的时间的影响.
- 在敏感的发育窗口中探索与ELS相关的分子和代谢变化.
- 了解ELS诱导的发育转变如何可能导致长期的功能后果.
主要方法:
- 在小鼠中,通过在出生后第12天的动物运输诱导ELS.
- 视觉皮层关键时期时间和视觉敏度成熟度的评估.
- 经神经网络 (PNN) 的组织学染色作为关键期可塑性的标记.
- 视觉皮层mRNA表达的分析,NMR光谱和代谢学.
- 与精神疾病风险和半球不对称性相关的基因表达的评估.
主要成果:
- ELS加速了视觉皮层关闭和开放的关键时期.
- 在ELS之后观察到视力敏度的过早成熟和抑制PNN的早期出现.
- 视觉皮层基因表达的持久变化,包括与精神疾病相关的变化,被确定为右侧不对称.
- 根据代谢学和NMR光谱学,ELS激活了能量代谢和蛋白质生物合成.
- 数据表明,ELS使大脑发育失调,可能导致长期功能缺陷.
结论:
- 生命早期的压力可以加速视觉系统的发育,导致过早的关键期可塑性.
- 脑发育的ELS诱导的失同可能会导致持续的功能障碍.
- 在脆弱的发育阶段运送实验室动物可以在实验设计中引入重大混,影响研究有效性.
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