第一个强大的宏观循环A3腺素受体激动剂揭示了G-蛋白和β-阿雷斯2信号偏好
Dilip K Tosh1, Courtney L Fisher2, Veronica Salmaso1,3
1Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Disease, National Institutes of Health, 9000 Rockville Pike, Bethesda, Maryland 20892, United States.
合成了新的宏环腺素受体激活剂,显示出改变的信号通路和增强的Gαi2合. 这些化合物为设计具有独特药理特征的选择性A3腺素受体激动剂提供了新的途径.
科学领域:
- 药用化学 医学化学
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
背景情况:
- 腺素受体 (ARs) 是药物的关键点.
- 针对各种治疗应用,A3 AR激动剂正在被研究.
- 开发选择性和强大的A3 AR调制器仍然是一个挑战.
研究的目的:
- 合成新的宏环 (N) - 甲糖腺衍生物作为A3AR激动剂.
- 研究宏环化对A3AR亲和力,选择性和信号通路的影响.
- 探索宏循环A3AR激动剂的结构-活性关系.
主要方法:
- 合成N6和C2链延长的 (N) -甲甲腺衍生物.
- 宏观循环形成17-20个原子环结构.
- 放射性联体结合测试以确定受体亲和性和选择性.
- 功能性测试 (β-arrestin2和Gαi蛋白质测试) 来评估信号有效性和通路偏差.
主要成果:
- 宏循环还保留或增强了A3AR亲和力和选择性.
- 与线性类似物和参考激动剂Cl-IB-MECA相比,宏观循环衍生物表现出不同的信号配置.
- 在特定的宏观循环中观察到增强的Gαi2合和β-arrestin2招募.
- 与C2-arylethynyl相关的宏循环19显示了A3 AR选择性的改善.
结论:
- 宏循环化是一种可行的策略,可以调节GPCRagonist药理学.
- 这些新型宏环A3AR激动剂表现出独特的信号偏好,为向治疗提供了潜在的潜力.
- 这项研究为设计未来具有量身定制药理性质的宏循环AR激动剂提供了基础.
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