Synthesis and Biological Activity of a Novel Methylamine-Bridged Enkephalin Analogue (MABE): A New Route to Cyclic Peptides and Peptidomimetics
作者:Kevin Shreder、Li Zhang、Trunghau Dang、Tony L. Yaksh、Hiroshi Umeno、Robert DeHaven、Jeffrey Daubert、Murray Goodman
DOI:10.1021/jm970861r
日期:1998.7.1
The synthesis and biological activity of a methylamine-bridged enkephalin analogue (MABE) is presented. The key step in the synthesis of the target compound involves the ring opening of Cbz-d-serine beta-lactone with Boc-Phe-NHCH2CH2NHCH3. Further synthetic elaboration of the resulting building block yielded compound 1 (MABE, Tyr-c[(NbetaCH3)-D-A2pr-Gly-Phe-NHCH2CH2-], where A2pr is a 2,3-diaminopropionic
介绍了甲胺桥脑啡肽类似物(MABE)的合成和生物活性。合成目标化合物的关键步骤涉及Cbz-d-丝氨酸β-内酯与Boc-Phe-NHCH2CH2NHCH3的开环。所得结构单元的进一步合成制备得到化合物1(MABE,Tyr-c [(NbetaCH3)-D-A2pr-Gly-Phe-NHCH2CH2-],其中A2pr是2,3-二氨基丙酸残基)。利用NMR和分子建模相结合的方法,研究了化合物1的结构-生物学活性关系。使用体外分离的受体测定法,发现MABE对分离的mu delta和kappa阿片样物质受体的亲和力分别为1.6、2.1和340 nM。通过体内热逸出试验,鞘内注射时,在大鼠中发现MABE的ED50为0.027微克。纳洛酮逆转了这种作用。相比之下,在同一试验中,发现DAMGO,吗啡和DPDPE的ED50值分别为0.14、2.4和54微克。