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- W2159928689 abstract "The kinin B1 receptor (B1R) has attracted interest as a potential therapeutic target because this inducible G protein-coupled receptor is involved in sustained inflammation and inflammatory pain production. Compound 11 (2-[(2R)-1-[(3,4-dichlorophenyl) sulfonyl]-3-oxo-1,2,3,4-tetrahydroquinoxalin-2-yl]-N-[2-[4-(4,5-dihydro-1H-imidazol-2-yl)phenyl]ethyl]acetamide) is a high-affinity nonpeptide antagonist for the human B1R, but it is potent at the rabbit B1R as well: its Ki value for the inhibition of [3H]Lys-des-Arg9-BK (bradykinin) binding to a novel myc-labeled rabbit B1R expressed in COS-1 is 22 pM. In contractility tests (organ bath pharmacology), we found that compound 11 is an apparently surmountable antagonist of des-Arg9-BK- or Lys-des-Arg9-BK-induced contraction of the rabbit isolated aorta (pA2 values of 10.6+/-0.14 and 10.4+/-0.12, respectively). It did not influence contractions induced by angiotensin II in the rabbit aorta or by BK or histamine in the jugular vein, but it suppressed the prostaglandin-mediated relaxant effect of des-Arg9-BK on the rabbit isolated mesenteric artery. Compound 11 (1 nM) inhibited both the phosphorylation of the extracellular signal-regulated kinase1/2 mitogen-activated protein kinases induced by Lys-des-Arg9-BK in serum-starved rabbit aortic smooth muscle cells and the agonist-induced translocation of the fusion protein B1R-yellow fluorescent protein expressed in human embryonic kidney (HEK) 293 cells. Compound 11 does not importantly modify the expression of myc-B1R over 24 h in HEK 293 cells (no detectable action as pharmacological chaperone). The present results support that compound 11 is a potent and highly selective antagonist suitable for further investigations of the role of the kinin B1R in models of inflammation, pain, and sepsis based on the rabbit." @default.
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- W2159928689 date "2004-07-26" @default.
- W2159928689 modified "2023-09-27" @default.
- W2159928689 title "A Novel Nonpeptide Antagonist of the Kinin B1Receptor: Effects at the Rabbit Receptor" @default.
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- W2159928689 doi "https://doi.org/10.1124/jpet.104.071266" @default.
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