大型图书馆对接大麻素-1受体激动剂,副作用减少
bioRxiv : the preprint server for biology
|February 8, 2024
概括
研究人员通过对接数百万个分子来发现新的大麻素-1受体 (CB1R) 激活剂,发现了新的大麻素化学型. 这导致了一种具有强烈止痛作用和广泛的治疗窗口的强有力的新激动剂,这表明了更安全的疼痛治疗的潜力.
科学领域:
- 药用化学 医学化学
- 神经科学是一个神经科学.
- 结构生物学 结构生物学
背景情况:
- 大麻素-1受体 (CB1R) 是疼痛治疗的关键标.
- 现有的CB1R激动剂经常表现出剂量限制的副作用,阻碍了临床应用.
- 发现新型化学型对于开发更安全,更有效的CB1R向药物至关重要.
研究的目的:
- 通过大规模的虚拟查来确定大麻素-1受体 (CB1R) 的新型激动剂.
- 优化化合物以提高功效和选择性.
- 评估开发的激动剂的治疗潜力和副作用概况.
主要方法:
- 7400万个分子对CB1R进行大规模虚拟查.
- 新生合成和放射性体竞争试验,以验证成功.
- 基于结构的药物设计和优化.
- 电子显微镜 (cryo-EM) 用于结构的确定.
- 在体内 analgesic 和行为评估.
主要成果:
- 从46种优先考虑的化合物中鉴定出9种活性CB1R激动剂,产生20%的命中率.
- 一种化合物的优化导致了'4042,一种强大的全CB1R激动剂,具有纳米分子亲和力 (1.9 nM Ki).
- 冷电磁结构证实了与CB1R-Gi1.1结合的优化激动剂 ('1350) 的对接姿势.
- 新的激动剂表现出强大的止痛效果,治疗窗口比镇静剂和催眠剂大5至10倍,并且没有条件的位置偏好.
结论:
- 通过大规模的对接方法,可以有效地发现新的大麻素化学型.
- 开发的CB1R激动剂 ("4042) 在疼痛管理方面表现出有前途的特征,可能将止痛与常见副作用分开.
- 这些发现支持继续开发新型大麻素,用于缓解疼痛的治疗应用.
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