用1,2,3-三醇替代胺基的生物异构替代改善多巴胺D4受体连接体 药理动力学
Mohammad Alkhatib1, Franziska M Jakobs2, John N Hanson3
1Department of Chemistry & Biochemistry, Department of Biological & Biomedical Sciences, College of Science and Mathematics, Rowan University, 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States.
使用三醇链接剂的新多巴胺D4受体 (D4R) 配体显示,大鼠的代谢稳定性和大脑暴露改善. 这些化合物是研究神经过程中D4R信号的宝贵工具.
科学领域:
- 神经科学是一个神经科学.
- 药用化学 医学化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 多巴胺D4受体 (D4R) 信号传递对于决策,记忆和注意力等认知功能至关重要.
- 之前的D4R选择性配体由于胺键的水解而遭受了较差的代谢稳定性.
- 在体内研究中存在对代谢稳定的D4R配体的需求.
研究的目的:
- 合成和表征具有增强代谢稳定性的新型D4R选择性配体.
- 通过点击化学,用1,2,3-triazole链接剂取代胺链接剂.
- 评估这些新类型的亲和力,疗效,代谢稳定性和药理动力学特性.
主要方法:
- 使用点击化学合成D4R连接物类型,以结合1,2,3-triazole链接剂.
- 使用cAMP和β-arrestin招募试验评估D4R结合亲和力和功能疗效.
- 使用老鼠和人类肝脏显微体评估代谢稳定性.
- 在老鼠中对所选化合物的药理动力学研究.
主要成果:
- 1,2,3-triazole类型保持了高的D4R亲和力和亚型选择性.
- 与含有胺的化合物相比,功能疗效略有降低.
- 与胺基联体相比,醇替代显著提高了代谢稳定性.
- 化合物17 (对抗剂) 和18 (部分对抗剂) 在大鼠中表现出有利的血半衰期和脑部暴露.
结论:
- 1,2,3-三醇类似物代表了一类代谢稳定的D4R配体.
- 这些化合物显示出适合动物模型体内研究的药理动力学特征.
- 这些新型类型是改进的分子工具,用于研究D4R在认知和行为中的作用.
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