慢性社会失败 压力增加了通过恐惧的社会回避 学习
bioRxiv : the preprint server for biology
|July 1, 2024
概括
慢性社会失败压力 (CSDS) 通过与社会目标建立恐惧关联,在小鼠中诱导社会回避. 在这种压力模型中,这种恐惧条件化是驱动行为变化的关键机制.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 压力研究 压力研究
背景情况:
- 慢性社会失败压力 (CSDS) 是一种与压力相关的疾病的动物模型.
- 在CSDS之后,容易受到压力的小鼠表现出较低的社交互动.
- 恐惧学习在CSDS诱导的社会回避中的作用需要进一步研究.
研究的目的:
- 在CSDS之后调查恐惧学习在社会回避中的作用.
- 检查129Sv/Ev小鼠的恐惧调节机制,这是一种易受CSDS影响的菌株.
- 确定CSDS中的社会回避是否由恐惧回路介导.
主要方法:
- 使用了129Sv/Ev小鼠,一种更容易受到CSDS的菌株.
- 评估了对CD-1小鼠和同类动物的社会互动和回避行为.
- 采用了帕夫洛夫式的恐惧调节范式,包括二次调节.
- 通过重复的社会互动,研究了有条件回避的灭绝.
主要成果:
- 被击败的129Sv/Ev小鼠避免了CD-1小鼠,但没有同类,表明社会动机完好无损.
- 鼠标学会将CD-1鼠标的外套颜色与威胁联系起来,发展了有条件的回避.
- 避免行为在10天的CSDS中逐渐获得,并在反复的社交互动中消失.
- 第二阶段的条件导致避免空房,表现出普遍的恐惧.
- 社交互动的变化表明,恐惧将恐惧推广到其他社会目标.
结论:
- 对社会目标的恐惧条件化是CSDS诱导的社会回避的关键组成部分.
- CSDS涉及恐惧学习机制,这些机制有助于行为缺陷.
- 研究结果表明,恐惧回路与慢性压力下社会回避的病理生理学有关.
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