Effects of Modifications of Residues in Position 3 of Dynorphin A(1−11)-NH<sub>2</sub> on κ Receptor Selectivity and Potency
作者:Feng-Di T. Lung、J.-P. Meyer、Bih-Show Lou、Li Xiang、Guigen Li、Peg Davis、Irene A. De Leon、Henry I. Yamamura、Frank Porreca、Victor J. Hruby
DOI:10.1021/jm950655o
日期:1996.1.1
synthesized the linear analogues [D-Ala3]Dyn A(1-11)-NH2 (2) and [Ala3]Dyn A(1-11)-NH2 (3) and reported their biological activities. Analogues 2 and 3 displayed affinities for the central kappa opioid receptor (IC50 = 0.76 and 1.1 nM, respectively) similar to that of Dyn A(1-11)-NH2 (1) (IC50 = 0.58 nM) and greatly enhanced selectivities for kappa vs mu and kappa vs delta receptors (IC50 ratios of 350 and
据报道强啡肽A(Dyn A)中的酪氨酸1和苯丙氨酸4是阿片激动剂活性和对κ受体效力的重要残基。强啡肽A在2和3位的甘氨酸残基可能会影响1和4位芳环的相对取向,但它们的柔韧性妨碍了仔细的分析。为了检查对强啡肽A的这些作用,我们先前已经合成了线性类似物[D-Ala3] Dyn A(1-11)-NH2(2)和[Ala3] Dyn A(1-11)-NH2(3),并进行了报道他们的生物活动。类似物2和3与Dyn A(1-11)-NH2(1)(IC50 = 0.58 nM)相似,显示出对中央κ阿片受体的亲和力(分别为IC50 = 0.76和1.1 nM)(IC50 = 0.58 nM),并且大大提高了对Kappa的选择性vs mu和kappa vs delta受体(2的IC50比分别为350和1300,3的IC50比为190和660,分别)。这些结果表明,Dyn A(1-11)-NH2 3位氨基酸的结