在阿片类受体部分激动剂的结构引导设计
Tao Che1, Balazs Varga2, Sarah M Bernhard3
1Washington University in St. Louis.
Research square
|July 29, 2024
概括
由于慢性疼痛和阿片类药物过量死亡,开发新型止痛药是至关重要的. 研究人员创造了C6-Quino,一种选择性三角类阿片类受体 (δOR) 部分激动剂,证明了安全有效的止痛,没有不良影响.
科学领域:
- 药理学 药理学是指药理学的学科.
- 神经科学是一个神经科学.
- 药用化学 医学化学
背景情况:
- 慢性疼痛和阿片类药物过量服用导致的死亡需要替代μ阿片类受体 (μOR) 的替代止痛药.
- δ阿片类受体 (δOR) 提供了一个非成性疼痛缓解的潜在目标,但早期的激动剂引起了发作.
- 部分 δOR 激动剂可能会提供更安全的止痛,但它们的机制尚不清楚.
研究的目的:
- 使用基于结构的方法设计和描述一种新的选择性 δOR 部分激动剂.
- 为了研究在 δOR 的部分激动的分子机制,专注于口袋的参与.
- 在临床前模型中评估开发的配方体的止痛疗效和安全性.
主要方法:
- 基于结构的药物设计和对比托基联结体 (C6-Quino) 的计算预测.
- 在体外功能测试以评估G蛋白和阿雷斯通路上的 δOR活性.
- 单颗粒冷电子显微镜 (cryo-EM) 用于分析联体受体相互作用.
- 在慢性疼痛模型中进行体内研究,以评估镇痛效果和安全性.
主要成果:
- 鉴定出C6-Quino是一种具有双通路活性的选择性 δOR 部分激动剂.
- 冷EM证实了C6-Quino与δOR结合口袋的相互作用.
- 在多种慢性疼痛模型中,C6-Quino表现出口服生物可用性和强烈的止痛作用.
- 关键的是,C6-Quino在止痛剂量下没有诱导与μOR相关的超位/呼吸抑制或 δOR相关的.
结论:
- 一种基于结构的新策略成功产生了一种安全有效的δOR部分激动剂,C6-Quino.
- 这种方法为开发更安全的针对 δOR 的止痛药提供了蓝图.
- 这些发现为优化A类G蛋白结合受体 (GPCRs) 的信号配置提供了一种可概括的方法.
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