小与大图书馆对接用于传感受体的正调节器
Fangyu Liu1, Cheng-Guo Wu2, Chia-Ling Tu3
1Dept. of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco CA 94143, USA.
bioRxiv : the preprint server for biology
|January 18, 2024
概括
研究人员通过对接大型分子图书馆,为感应受体 (CaSR) 发现了强大的新型正调节器 (PAM). 这些新型的CaSR PAM有效地降低了副甲状腺激素 (PTH),而不会导致低血症,提供了一种有前途的治疗方法.
科学领域:
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
- 药物发现 药物发现 药物发现
背景情况:
- 使用感应受体 (CaSR) 阳性全调制剂 (PAMs) 治疗甲状腺功能障碍症的治疗受限于像低血症这样的副作用.
- 现有的CaSR PAMs可能会导致心律失常和低血症,需要寻找更安全,更有效的替代品.
研究的目的:
- 为了确定新的,强效的,更安全的CaSR PAMs用于治疗甲状腺功能障碍症.
- 探索大规模分子对接的实用性,以发现治疗线索.
主要方法:
- 27万和12亿个分子对活动状态的CaSR二极管结构进行对接.
- 基于结构的优化识别的连接体.
- 外体器官测定和体内小鼠研究,以评估疗效和安全性.
- 电子显微镜 (Cryo-EM) 用于确定新 PAMs 的 CaSR 的结构.
主要成果:
- 与百万分子对接相比,数十亿分子对接产生了2.7倍更高的命中率和高达37倍更强大的命中率.
- 优化的配体产生了纳米分子导体,其中一个候选者在体外测试中显示出比cinacalcet大100倍的功效.
- PAM可使小鼠的血清PTH水平降低高达80%,而不会引起低血症.
- 低温EM显示,新的PAM诱导了不同的CaSR二分体构造,促进了G蛋白合状态.
结论:
- 大型图书馆对接,特别是数十亿分子规模的对接,是发现强有力的药物线索的强大策略.
- 与现有治疗方法相比,新发现的CaSR PAMs表现出优越的疗效和安全性.
- 对CaSR-PAM相互作用的结构洞察力为改善药物设计提供了机制基础.
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