迷幻5-HT2A受体激素改变神经血管合,并对大脑功能的神经和血液动力学测量有差异性影响
Jonah A Padawer-Curry1,2, Oliver J Krentzman3, Chao-Cheng Kuo3
1Imaging Science Program, Washington University in St. Louis, St. Louis, MO, USA.
Nature neuroscience
|October 14, 2025
概括
像psilocybin这样的迷幻药物会改变大脑活动,但可能会破坏神经血管合. 这项研究揭示了神经元和血液动力学信号之间的分离,强调在迷幻研究中需要考虑血管效应的必要性.
科学领域:
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 人类神经成像研究将迷幻药物与依赖于血清素-2A受体的大脑重组联系起来.
- 这些研究往往忽略了血清的重要血管活性 (影响血管) 特性.
研究的目的:
- 通过功能磁共振成像 (fMRI) 来研究血动力学反应功能的psilocybin诱导的改变.
- 用小鼠模型来确定迷幻诱导的血液动力学变化是否起源于神经元,血管或神经血管起源.
- 探索迷幻药对神经血管合和功能连接性评估的影响.
主要方法:
- 功能性磁共振成像 (fMRI) 在人体中,以评估psilocybin对血液动力学反应的影响.
- 在清醒的Thy1-jRGECO1a小鼠中进行广场光学成像,以分析神经元和血液动力学活动.
- 给药的是迷幻的2,5-dimethoxy-4-iodoamphetamine (DOI) 和一种选择性的血清素-2A受体对抗剂 (MDL100907).
主要成果:
- 在小鼠中,迷幻DOI诱导了皮层神经元活动和血液动力学反应之间的合的明显变化.
- 在比较基于神经元和基于血液动力学的功能连接的测量时,DOI导致了相互矛盾的结果.
- 一种选择性的血清素-2A受体对手在很大程度上逆转了DOI观察到的效果.
结论:
- 迷幻药的使用导致神经元和血液动力学信号之间的分离.
- 解释基于血液的神经成像数据 (如fMRI) 需要考虑迷幻药物的神经血管影响.
- 色素-2A受体活性在调解这些迷幻诱导的神经血管变化方面发挥着至关重要的作用.
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