使用基于过渡的重量调整方法对针对大麻素受体的新精神活性物质的结合动力学和细胞内信号的表征
Soumajit Dutta1, Diwakar Shukla1,2,3,4
1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801.
bioRxiv : the preprint server for biology
|October 24, 2023
概括
新型精神活性物质 (NPS) 由于在大麻素受体1 (CB1) 上增强的β-止素信号传递,导致严重的副作用. 了解这些差异是监管NPS药物的关键.
科学领域:
- 药理学 药理学是指药理学的学科.
- 计算化学的计算化学
- 神经科学是一个神经科学.
背景情况:
- 针对大麻素受体1 (CB1) 的新型精神活性物质 (NPS) 因其严重的生理副作用而成为越来越严重的公共卫生问题.
- 这些不良反应与下游β-arrestin信号传递相比,与HU-210等经典大麻素相比,更强烈.
研究的目的:
- 调查NPS和古典大麻素在CB1的差异信号的基础上的分子机制.
- 阐明结构-活动关系,有助于增加NPS的不良影响.
主要方法:
- 采用多组分子动力学 (MD) 模拟来研究CB1中的NPS MDMB-Fubinaca和HU-210的解结过程.
- 基于过渡的重权测试被用来确定连接体解结的热力学和动力学.
- 深度学习,特别是神经关系推理 (NRI),被应用来分析细胞内信号通路上的全效应.
主要成果:
- 在NPS和古典大麻素之间观察到与跨膜TM7螺旋体的联结体相互作用的显著差异.
- NRI分析显示,NPS结合CB1受体中NPxxY动机的强化全控制.
- 结合NPS促进了关键的Y (7.53) -Y (5.58) -T (3.46) 三重相互作用,导致β-阿雷斯信号的增加.
结论:
- 这项研究确定了增强β-止素信号的结构基础以及NPS的相关不良影响.
- 调查结果为识别,监管和减轻NPS对公共健康的影响提供了关键的见解.
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