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Pharmacological profile of BIBN4096BS, the first selective small molecule CGRP antagonist.首个选择性小分子降钙素基因相关肽(CGRP)拮抗剂BIBN4096BS的药理学特性
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BIBN4096BS是一种强效竞争性拮抗剂,可拮抗α-CGRP对人颞动脉的舒张作用:与CGRP(8-37)的比较。

BIBN4096BS is a potent competitive antagonist of the relaxant effects of alpha-CGRP on human temporal artery: comparison with CGRP(8-37).

作者信息

Verheggen Raphaela, Bumann Katja, Kaumann Alberto J

机构信息

Department of Neurosurgery, University of Göttingen, 37075 Göttingen, Germany.

出版信息

Br J Pharmacol. 2002 May;136(1):120-6. doi: 10.1038/sj.bjp.0704682.

DOI:10.1038/sj.bjp.0704682
PMID:11976276
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1762122/
Abstract

Release of CGRP during migraine may produce harmful dilatation of cranial arteries, thereby possibly causing pain. We have compared the antagonism by BIBN4096BS and CGRP(8-37) of the relaxant effects of alpha-CGRP on rings of human temporal artery. alpha-CGRP relaxed the arteries precontracted with 9 - 24 mM KCl (-logEC50=9.4) nearly as efficaciously as sodium nitroprusside (10 microM). BIBN4096BS (0.1 - 100 nM) antagonized the effects of alpha-CGRP in surmountable manner with slopes of Schild-plots not different from unity. -LogKB values of 10.1 and 10.4 were estimated for BIBN4096BS when administered before or during the KCl-contracture respectively. BIBN4096BS (1 microM) did not modify the relaxant effects of papaverine and sodium nitroprusside. CGRP(8-37) (1 - 10 microM) antagonized the effects of alpha-CGRP in a surmountable manner with slopes of Schild-plots not different from unity. -LogKB values of 6.6 and 6.7 were estimated for CGRP(8-37) administered before or during the KCl-contracture respectively. The high affinity of BIBN4096BS for CGRP receptors of human temporal artery makes it an excellent tool to explore the hypothesis of CGRP-evoked cerebral vasodilation in migraine.

摘要

偏头痛发作时降钙素基因相关肽(CGRP)的释放可能会导致颅动脉有害性扩张,从而可能引发疼痛。我们比较了BIBN4096BS和CGRP(8-37)对α-CGRP舒张人颞动脉环作用的拮抗效果。α-CGRP使预先用9 - 24 mM氯化钾预收缩的动脉舒张(-logEC50 = 9.4),其效力与硝普钠(10 microM)相近。BIBN4096BS(0.1 - 100 nM)以可克服的方式拮抗α-CGRP的作用,其Schild图斜率与1无差异。分别在氯化钾收缩前或收缩期间给予BIBN4096BS时,估计其-logKB值为10.1和10.4。BIBN4096BS(1 microM)不改变罂粟碱和硝普钠的舒张作用。CGRP(8-37)(1 - 10 microM)以可克服的方式拮抗α-CGRP的作用,其Schild图斜率与1无差异。分别在氯化钾收缩前或收缩期间给予CGRP(8-37)时,估计其-logKB值为6.6和6.7。BIBN4096BS对人颞动脉CGRP受体的高亲和力使其成为探索偏头痛中CGRP诱发脑血管舒张假说的理想工具。