Synthesis and binding activity of endomorphin-1 analogues containing β-amino acids
作者:Giuliana Cardillo、Luca Gentilucci、Paolo Melchiorre、Santi Spampinato
DOI:10.1016/s0960-894x(00)00562-x
日期:2000.12
this paper, we describe the synthesis of some endomorphin-1 based tetrapeptides in which a residue of the sequence Tyr-Pro-Trp-PheNH2 is replaced by the corresponding beta-isomer. These novel peptides showed different affinities for the opioid receptors labeled with [3H]-DAMGO in rat brain membranes, depending on the beta-amino acid. In particular, the tetrapeptide containing beta-Pro (Tyr-beta-(R)-Pro-Trp-PheNH2)
Endomorphin-1(Tyr-Pro-Trp-PheNH2)被认为是μ阿片受体最有效的内源性配体。在本文中,我们描述了一些基于内啡肽-1的四肽的合成,其中序列Tyr-Pro-Trp-PheNH2的残基被相应的β-异构体取代。这些新肽对大鼠脑膜中标有[3H] -DAMGO标记的阿片类受体表现出不同的亲和力,具体取决于β-氨基酸。特别地,如其Ki值(分别为0.33和11.1 nM)所揭示的那样,含四肽的β-Pro(Tyr-β-(R)-Pro-Trp-PheNH2)显示出比内源性内啡肽-1高的亲和力。