性别特定的GABAergic微电路将脆弱性转换为应激弹性,并逆转慢性应激暴露的影响
Bernhard Luscher1, Tong Jiang, Mengyang Feng
1Pennsylvania State University.
Research square
|July 23, 2024
概括
在特定的大脑区域激活体静止素 (SST) 神经元可促进应激弹性,并逆转类似焦虑的行为. 这些发现揭示了性别和区域特定的神经可塑性,用于应激适应.
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:
- 索马托斯坦素 (SST) 阳性内部神经元调节精神疾病中的压力脆弱性.
- 对SST神经元的消抑制赋予了对慢性压力影响的弹性.
研究的目的:
- 通过使用慢性化学遗传协议,研究SST神经元在与压力相关的行为中的作用.
- 绘制SST神经元激活对有动机的行为和应激弹性产生性别和大脑区域特异性的影响.
主要方法:
- 利用腺相关病毒 (AAV) -hM3Dq用于前临床皮质 (PLC) 和腹部海马体 (vHPC) 中SST神经元的慢性化学遗传激活.
- 在雄性和雌性小鼠中评估了与焦虑和无情相关的动机行为和应激弹性.
- 量化c-Fos和FosB表达以检查神经元活动变化.
主要成果:
- 在PLC中SST神经元的激活在男性中显示出类似抗抑郁药的效应;在vHPC中,在女性中观察到效应.
- 在PLC中SST神经元的激活诱导了男性的应激弹性,而vHPC激活诱导了女性的弹性.
- 激活SST神经元以性别和区域特定的方式逆转了压力诱导的行为缺陷,从而使金字塔细胞活动发生了矛盾的增加.
结论:
- 涉及SST神经元的GABAergic微电路调解性别和区域特定的神经可塑性,促进应激弹性.
- 这些发现为某些独立于性别的GABAergic激动剂的抗抑郁疗效提供了机制基础.
- 该研究强调了SST内部神经元在应激适应中的关键作用以及精神疾病的潜在治疗点.
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