BNST-CeA电路的血清能调节促进了恐惧学习中的性别差异
bioRxiv : the preprint server for biology
|July 18, 2023
概括
在雄性和雌性小鼠中,血清激素对恐惧记忆的影响不同. 在女性中,特定的血清素通路激活增强了恐惧回忆,这表明女性患PTSD风险更高的电路基础.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 精神病学是一个精神病学.
背景情况:
- 创伤后应激障碍 (PTSD) 涉及到强烈的恐惧记忆形成.
- 在女性中,PTSD的诊断比男性更频繁.
- 血清素在恐惧处理和记忆中起着重要作用.
研究的目的:
- 为了研究血清素对恐惧学习和记忆的影响的性别差异.
- 探索参与性别特异性恐惧记忆调制的神经回路.
- 确定可能导致女性PTSD患病率较高的潜在机制.
主要方法:
- 在雄性和雌性小鼠中听觉恐惧调节.
- 药理学操纵血清水平. 药理学操纵血清水平.
- 背脊的光遗传性刺激 投射到前脊床核的终端 (adBNST).
- 在BNST和杏仁体 (CeA) 中央核中测量c-Fos表达.
- 分析高马 (90-140Hz) 同步和adBNST和CeA之间的通信.
主要成果:
- 在恐惧调节过程中,女性对血清激素增加的敏感性增加.
- 氨酸的使用在两性中都增强了恐惧记忆的回忆.
- 背脊拉菲终端的光遗传刺激激活了BNST和CeA,通过adBNST 5-HT2C受体增强了回忆力.
- 在学习期间的血清激素刺激增强了adBNST-CeA高马同步和女性在回忆期间的沟通.
结论:
- 拉菲-BNST-CeA电路中的性别差异调节了恐惧记忆.
- 血清素对adBNST 5-HT2C受体的激活对于女性的恐惧记忆增强至关重要.
- 在女性高马频率期间,adBNST-CeA通路中的增强神经通信可能是PTSD风险的基础性差异.
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