新生儿暴露于神经活性类固醇会改变体内的低频振荡
Brier Fine-Raquet1, Francesca M Manzella1,2, Srdjan M Joksimovic1
1Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
Experimental biology and medicine (Maywood, N.J.)
|June 13, 2023
概括
新生儿暴露于神经活性类固醇3β-OH并没有改变睡眠模式,但在青少年大鼠中降低了特定的大脑波活动. 这与胺相反,表明镇静剂对发育中的大脑有不同的长期影响.
科学领域:
- 神经科学是一个神经科学.
- 发育神经科学的发展神经科学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 新生儿接触镇静剂可能会导致发育中的大脑的神经毒性.
- 由于缺乏神经毒性,3β-OH等神经活性类固醇显示出潜在的安全替代品.
- 新生儿神经活性类固醇暴露的长期神经生理影响尚不清楚.
研究的目的:
- 调查新生儿3β-OH暴露对睡眠,脑下神经生理学和青少年大鼠突触可塑性的持久影响.
- 为了比较3β-OH对神经生理的影响与之前研究的胺暴露.
主要方法:
- 幼鼠在新生儿时暴露在3β-OH或载体中.
- 脑电图 (EEG) 和脑下深度电极用于体内睡眠和神经元振荡的评估.
- 活体研究评估了长期潜能 (LTP) 在 subiculum.
主要成果:
- 新生儿3β-OH暴露在非快速眼球运动睡眠期间降低了潜眼三角形和西格玛振荡.
- 睡眠宏观结构 (清醒,NREM,REM睡眠) 保持不变.
- 皮突触可塑性 (LTP) 没有显著变化.
结论:
- 与胺相比,新生儿暴露于3β-OH会导致脑下电路的明显,持久的功能变化.
- 这些发现表明,不同的镇静剂/催眠剂可能对发育中的大脑产生独特的长期神经生理后果.
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