Structure-Activity Study of Neuropeptide FF: Contribution of N-Terminal Regions to Affinity and Activity
作者:Sophie Gicquel、Honore Mazarguil、Corinne Desprat、Michele Allard、Jean-Philippe Devillers、Guy Simonnet、Jean-Marie Zajac
DOI:10.1021/jm00047a005
日期:1994.10
neuropeptide FF (NPFF) analogs having various lengths were synthesized by solid-phase peptide synthesis to gain more information on the role of N-terminal residues for the NPFF receptor affinity. The affinities were evaluated in the rat spinal cord membrane preparations, and the biological activities were measured on morphine analgesia in the mouse tail-flick test. Shortening of the NPFF sequence from the N-terminal
通过固相肽合成合成了二十种具有各种长度的神经肽FF(NPFF)类似物,以获取有关N末端残基对NPFF受体亲和力的作用的更多信息。在大鼠脊髓膜制剂中评估亲和力,并在小鼠甩尾试验中测量对吗啡镇痛的生物学活性。从N末端缩短NPFF序列只会使亲和力适度降低,直到达到NPFF(4-8)。以同样的方式,NPFF(3-8)显着降低了吗啡镇痛作用,而NPFF(4-8)在22 nmol剂量下无明显作用。在NPFF的N-末端部分在2和1位引入D-对映异构体或在3位存在N-甲基没有改变亲和力和活性。无论长度如何,D异构体取代脯氨酸5都会降低NPFF类似物的亲和力,并且[Tyr1,D-Pro5] NPFF(1-8)的效力比[Tyr1] NPFF(1-8)低2.5倍吗啡引起的镇痛作用。相反,在位置5上存在甘氨酸残基不影响对NPFF受体的亲和力。数据提供了证据,表明神经肽FF的N末端片段负责高亲和力结合。