Highly potent and selective heptapeptide antagonists of the neurokinin NK-2 receptor
作者:Andrew B. McElroy、Stephen P. Clegg、Martyn J. Deal、George B. Ewan、Russell M. Hagan、Simon J. Ireland、Christopher C. Jordan、Barry Porter、Barry C. Ross
DOI:10.1021/jm00092a008
日期:1992.7
is known to enhance neurokinin NK-2 receptor agonist potency and selectivity with respect to other neurokinin receptors. We now report that replacement of D-Trp9 by D-Pro9 in the nonselective neurokinin antagonist [Arg5,D-Trp7,9, Nle11]-SP(5-11) gave a partial agonist with NK-2 receptor selectivity. Further incorporation of Pro10 provided the weak but selective NK-2 antagonist Arg-Ala-D-Trp-Phe-D-Pro-Pro-Nle-NH2
已知将D-Pro9掺入P物质相关肽可增强神经激肽NK-2受体激动剂的效力和相对于其他神经激肽受体的选择性。我们现在报告在非选择性神经激肽拮抗剂[Arg5,D-Trp7,9,Nle11] -SP(5-11)中由D-Pro9替代D-Trp9产生了具有NK-2受体选择性的部分激动剂。Pro10的进一步掺入提供了弱但选择性的NK-2拮抗剂Arg-Ala-D-Trp-Phe-D-Pro-Pro-Nle-NH2(化合物4; NK-2 pKB = 5.9; NK-1 pKB = 4.7; NK-3 pKB小于4.6)。向该化合物中添加合适的亲脂性N端取代基(例如Boc,PhCO,环己基羰基)可大大增强NK-2拮抗剂的活性(化合物10,GR 83074; NK-2 pKB = 8.2),并进一步优化N -末端氨基酸 提供了非常有效和选择性的NK-2拮抗剂PhCO-Ala-Ala-D-Trp-Phe-D-P