一个与纳洛合作的μ-阿片类受体调节器
Evan S O'Brien1, Vipin Ashok Rangari2, Amal El Daibani2
1Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA.
Nature
|July 3, 2024
概括
研究人员发现了一种选择性向非活性阿片类受体 (μOR) 的新化合物. 这种负调节剂 (NAM) 增强了纳洛.
科学领域:
- 药理学和药物化学
- 神经科学
- 结构生物学
背景情况:
- 片受体 (μOR) 是缓解疼痛的关键目标, 但其激动剂会引起危险的副作用, 如成和呼吸抑制, 助长了片危机.
- 开发更安全的止痛药和过量药物对策至关重要,负调节剂 (NAM) 的 μOR 显示出希望,但缺乏有效的化学支架.
研究的目的:
- 识别和表征新型,形状选择性的μOR NAM.
- 调查发现的NAM的作用机制,包括其结构基础和与纳洛的合作作用.
- 评估NAM在减轻阿片类药物诱导效应和戒断方面的 in vivo 疗效.
主要方法:
- 对大量DNA编码的化学库进行对不活跃的μOR进行选,并对活跃的受体状态进行反选.
- 低温电子显微镜 (cryo-EM) 来确定NAM结合的结构基础及其对受体构成的影响.
- 在动物模型中进行体内行为研究,以评估与纳洛联合使用的NAM的疗效.
主要成果:
- 发现一种选择性丰富无活性μOR并增强纳洛结合的NAM.
- 低温EM显示NAM与细胞外前庭结合,稳定不活跃的受体构成,并改变正体连接体动力学.
- 与低剂量纳洛合作,在体内有效抑制吗啡和芬太尼诱导的行为,同时最大限度地减少戒断症状.
结论:
- 一种新的μOR NAM已被确定具有独特的作用机制,稳定不活跃的受体构造.
- 这种NAM通过增强纳洛的疗效,并在体内合作抑制阿片类激动剂的作用,显示出治疗潜力.
- 这些发现提供了对全调节的结构性见解,并为更安全的阿片类药物管理和过量预防提供了有希望的策略.
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