Development of a new physicochemical model for brain penetration and its application to the design of centrally acting H2 receptor histamine antagonists
作者:Rodney C. Young、Robert C. Mitchell、Thomas H. Brown、C. Robin Ganellin、Robin Griffiths、Martin Jones、Kishore K. Rana、David Saunders、Ian R. Smith
DOI:10.1021/jm00398a028
日期:1988.3
A rational approach to the design of centrally acting agents is presented, based initially upon a comparison of the physicochemical properties of three typical histamine H2 receptor antagonists which do not readily cross the blood-brain barrier with those of the three brain-penetrating drugs clonidine (6), mepyramine (7) and imipramine (8). A good correlation was found between the logarithms of the
首先比较了三种不易穿越血脑屏障的典型组胺H2受体拮抗剂与三种穿透脑的药物可乐定(Clonidine)的理化性质,提出了一种设计中枢作用剂的合理方法。 6),美吡拉明(7)和丙咪嗪(8)。在大鼠中平衡的大脑/血液浓度比的对数与分配参数delta log P之间的相关性很好,定义为log P(1-辛醇/水)-log P(环己烷/水),表明可以通过降低整体氢键结合能力来改善大脑的渗透能力。通过对H2拮抗剂不同结构类型的代表进行系统的结构修饰,该模型已被用作设计新型可穿透脑的H2拮抗剂的指南。尽管在西咪替丁(1),雷尼替丁(9)和替替丁(10)的同类药物中脑渗透性显着提高,但未发现具有H2拮抗剂活性可接受组合的化合物(豚鼠心房中-log KB大于7.0)和大脑渗透(稳态脑/血浓度比大于1.0)。相反,N-[[((哌啶基-甲基)苯氧基]丙基]乙酰胺的结构修饰(30)导致了几种有效的新型化合物,它们很