Structure–activity relationships of simplified resiniferatoxin analogues with potent VR1 agonism elucidates an active conformation of RTX for VR1 binding
作者:Jeewoo Lee、Su Yeon Kim、Soyoung Park、Ju-Ok Lim、Ji-Min Kim、Myungshim Kang、Jiyoun Lee、Sang-Uk Kang、Hyun-Kyung Choi、Mi-Kyung Jin、Jacqueline D Welter、Tamas Szabo、Richard Tran、Larry V Pearce、Attila Toth、Peter M Blumberg
DOI:10.1016/j.bmc.2003.12.005
日期:2004.3
homovanillate and N'-(4-hydroxy-3-methoxybenzyl) thiourea derivatives that were potent VR1 agonists with high-affinities and excellent analgesic profiles. The design of these simplified RTX analogues was based on our RTX-derived pharmacophore model which incorporates the 4-hydroxy-3-methoxyphenyl (A-region), C(20)-ester (B-region), orthophenyl (C1-region) and C(3)-keto (C2-region) groups of RTX. For the purpose
我们先前描述了一系列N-(3-酰氧基-2-苄基丙基)高香草酸酯和N'-(4-羟基-3-甲氧基苄基)硫脲衍生物,它们是具有高亲和力和出色的镇痛作用的有效VR1激动剂。这些简化的RTX类似物的设计基于我们的RTX衍生的药效团模型,该模型包含了4-羟基-3-甲氧基苯基(A区),C(20)酯(B区),邻苯基(C1区)和RTX的C(3)-酮(C2-区域)组。为了优化前导激动剂(1-4)上四个主要药效基团的空间排列,我们通过延长或缩短一个碳原子来修饰母体C区3-酰氧基-2-苄丙基的距离改变药效基团之间的距离。我们发现,酰胺中的两个4和19具有EC(50)值< 1 nM用于诱导VR1-CHO细胞中的钙内流。如前所述,抑制RTX与VR1结合和诱导钙摄取的结构活性关系是截然不同的,大概反映了内在和方法上的因素。为了找到VR1配体的活性构象,确定了七个选定激动剂的能量最小构象,并将其四个药效团的位置与五个低能