在慢性压力和快速作用抗抑郁药治疗中对被动应对行为的前额外贡献
Tsz Hei Fong1,2, Tianxiang Li1, Xiaoyan Ma1
1School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
概括
在抑郁症中,持久的被动应对行为是由面向前皮质调节的. 慢性压力会破坏它的兴奋/抑制平衡,这种效应被快速起作用的抗抑郁药物,如氨基胺,迅速逆转.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 分子生物学分子生物学
背景情况:
- 持续的被动应对 (p-coping) 是主要抑郁症的一个关键特征.
- 快速起作用的抗抑郁药,如胺,可以逆转应对行为.
- 前额叶皮层抑制在p-coping中的作用及其通过压力和抗抑郁药物的调节是不清楚的.
研究的目的:
- 为了研究面向前皮质 (rPL) 在调节p-coping行为中的作用.
- 检查慢性压力和快速起作用的抗抑郁药物如何影响rPL中的兴奋/抑制 (E/I) 平衡.
- 为了确定参与这些过程的特定神经元群体.
主要方法:
- 利用体内电生理学来记录rPL中的神经元活动.
- 评估了rPL神经元的突触强度和内在刺激能力.
- 给慢性压力中的小鼠服用 (2R,6R) - 基诺基胺 (HNK).
主要成果:
- rPL双向控制p-coping行为,激发性和抑制性神经元具有相反的作用.
- 慢性压力降低了rPL神经元的E/I比率,改变了它们的活性和刺激性.
- HNK减少了p-coping,恢复了rPL E/I平衡,并部分逆转了压力诱导的神经元变化.
- 快速升/帕瓦尔胺抑制神经元受到压力和HNK的显著影响,在p-coping调节中发挥关键作用.
结论:
- 在rPL中的E/I平衡对于调节p-coping行为至关重要.
- 慢性压力会破坏这种E/I平衡,导致类似抑郁症的行为.
- 像HNK这样的快速起作用的抗抑郁药可以快速恢复rPL E/I平衡,并改善p-coping行为,突出治疗潜力.
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