A Novel Class of Orally Active Non-Peptide Bradykinin B<sub>2</sub> Receptor Antagonists. 2. Overcoming the Species Difference between Guinea Pig and Man
作者:Yoshito Abe、Hiroshi Kayakiri、Shigeki Satoh、Takayuki Inoue、Yuki Sawada、Noriaki Inamura、Masayuki Asano、Chie Hatori、Hiroe Sawai、Teruo Oku、Hirokazu Tanaka
DOI:10.1021/jm980214f
日期:1998.10.1
pig ileum and human A-431 cells, respectively. This compound displayed in vivo functional antagonistic activity against BK-induced bronchoconstriction in guinea pigs with an ED50 value of 0.17 mg/kg by oral administration. This novel non-peptide B2 antagonist is extremely potent both in vitro and in vivo by oral administration and is expected to be the first member of a new class of drug for the treatment
最近,我们报道了一系列的8-[[3-(N-酰基甘氨酰-N-甲基氨基)-2,6-二氯苄基]氧基] -3-卤-2-甲基咪唑并[1,2-a]吡啶的鉴定。第一种口服活性非肽缓激肽(BK)B2受体拮抗剂(1-3)。这些化合物通过纳摩尔IC50抑制[3H] BK与表达B2受体的豚鼠回肠膜制剂的特异性结合,并通过口服给药以1 mg / kg的剂量显示对豚鼠BK诱导的支气管收缩的体内功能拮抗活性。然而,发现它们对人A-431细胞(人表皮样癌)中的B2受体的亲和力要低得多。甘氨酸部分末端取代基的强烈修饰阐明了人类B2受体的结构活性关系(SAR),导致扩展了基本框架,并结合了新颖的关键药效基团。因此,我们克服了物种差异,并确定了第一个临床候选物18c(FR167344)对豚鼠回肠和人A-431细胞的IC50分别为0.66和1.4 nM。该化合物通过口服给药显示出对豚鼠中BK诱导的支气管收缩的体内功能拮抗活性,ED50值为0