Development of conformationally constrained linear peptides exhibiting a high affinity and pronounced selectivity for .delta. opioid receptors
作者:G. Gacel、V. Dauge、P. Breuze、P. Delay-Goyet、B. P. Roques
DOI:10.1021/jm00118a005
日期:1988.10
previously reported delta specific agonists DSLET (Tyr-D-Ser-Gly-Phe-Leu-Thr) and DTLET (Tyr-D-Thr-Gly-Phe-Leu-Thr). In binding studies based on displacement of mu and deltaopioidreceptor selective radiolabeled ligands from rat brain membranes, the two constrained hexapeptides, Tyr-D-Ser(O-t-Bu)-Gly-Phe-Leu-Thr (1, DSTBULET) (KI(mu) = 374 nM, Kr(delta) = 6.14 nM, KI(delta)/KI(mu) = 0.016) and in particular
设计了一系列线性构象受限的阿片样物质肽,以试图开发出对δ阿片样物质受体的高度选择性和有效的激动剂。这些脑啡肽类似物对应于通式Tyr-DX(OY)-Gly-Phe-Leu-Thr(OZ)是通过掺入大量残基获得的(X = Ser或Thr; Y =叔丁基或苄基; Z =叔-丁基)加入先前报道的δ特异性激动剂DSLET(Tyr-D-Ser-Gly-Phe-Leu-Thr)和DTLET(Tyr-D-Thr-Gly-Phe-Leu-Thr)的序列中。在基于从大鼠脑膜置换mu和delta类阿片受体选择性放射性标记配体的结合研究中,两个受约束的六肽Tyr-D-Ser(Ot-Bu)-Gly-Phe-Leu-Thr(1,DSTBULET)(KI (μ)= 374 nM,Krδ= 6.14 nM,KIδ/KIμ= 0.016),尤其是Tyr-D-Ser(Ot-Bu)-Gly-Phe-Leu-Thr(Ot -Bu)(7,BUBU)(KI(μ)=