早期生活中的压力对血清素连接性的长期影响
Raksha Ramkumar1, Moriah Edge-Partington1, Dylan J Terstege2
1Department of Psychology, University of Calgary, Calgary, Alberta, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada.
Biological psychiatry
|February 5, 2024
概括
早期的生活压力会破坏血清素 (5-HT) 脑电路,增加焦虑. 刺激拉菲-中介轨道前皮层 (OFC) 电路提供了取决于性别的抗焦虑效应,为与压力相关的疾病提供了新的治疗方法.
科学领域:
- 神经科学是一个神经科学.
- 发展心理学 发展心理学
- 精神病学是一个精神病学.
背景情况:
- 慢性童年压力是情感障碍的主要危险因素.
- 产后早期的血清素 (5-HT) 对大脑电路的成熟至关重要.
- 了解早期生活压力 (ELS) 对5-HT连接性的长期影响对于治疗压力诱导的情感障碍至关重要.
研究的目的:
- 研究ELS对5HT电路和小鼠模型行为的长期影响.
- 确定ELS对大脑功能连接和5-HT动态的性别特异性影响.
- 探索光遗传刺激的潜力,以改善ELS诱导的行为缺陷.
主要方法:
- 利用老鼠模型的慢性发育性压力.
- 使用FosTRAP小鼠绘制拉菲核的大脑功能连接的地图.
- 在体内进行纤维光度和光遗传学,以评估5-HT动态和电路刺激.
主要成果:
- 在成年雌性和雄性小鼠中,ELS诱导了类似焦虑的行为.
- 埃尔斯破坏了拉菲核的功能连接和5-HT神经元活动.
- 观察到轨道前皮层 (OFC) 活动增加和中介OFC中5-HT释放中断.
- 在中介性OFC中对5-HT终端的光遗传性刺激显示出取决于性别的抗焦虑效应.
结论:
- 埃尔斯显著破坏5-HT调节的大脑连接,有助于性别依赖的情感障碍的脆弱性.
- 针对拉菲-中介OFC电路的向刺激显示出治疗早期生活逆境引起的情感障碍的潜力.
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