N-Acyl-γ-D-glutamyl peptide derivatives containing a C-terminal small fragment of cholecystokinin were prepared and their effects on gastric secretion were investigated. PhCO-D-Glu(Phe-NH2)-NPr2 and PhCO-D-Glu(Asp-Phe-NH2)-NPr2 inhibited gastric secretion, while PhCO-D-Glu(Met-Asp-Phe-NH2)-NPr2 and PhCO-D-Glu(Trp-Met-Asp-Phe-NH2)-NPr2 stimulated gastric secretion. The substitution of the acyl function at the N-terminal of PhCO-D-Glu(Phe-NH2)-NPr2 affected the activity. Z-D-Glu(Phe-NH2)-NPr2, 4-chlorobenzoyl-D-Glu-(Phe-NH2)-NPr2 and isonicotinoyl-D-Glu(Phe-NH2)-NPr2 were found to have more potent inhibitory activity against gastric secretion than proglumide (PhCO-DL-Glu-NPr2).
制备了含有胆囊收缩素 C 端小片段的 N-酰基-γ-D-谷
氨酰肽衍
生物,并研究了它们对胃液分泌的影响。PhCO-D-Glu(Phe-NH2)-NPr2和PhCO-D-Glu(Asp-Phe-NH2)-NPr2抑制胃液分泌,而PhCO-D-Glu(Met-Asp-Phe-NH2)-NPr2和PhCO-D-Glu(Trp-Met-Asp-Phe-NH2)-NPr2刺激胃液分泌。PhCO-D-Glu(Phe-NH2)-NPr2 N 端酰基功能的替代影响了其活性。研究发现,Z-D-Glu(Phe-NH2)-NPr2、4-
氯苯甲酰基-D-Glu-(Phe-NH2)-NPr2 和异烟酰基-D-Glu(Phe-NH2)-NPr2 对胃液分泌的抑制活性比
丙谷胺(PhCO-DL-Glu-NPr2)更强。