Novel non-peptide lead structures forBradykinin B2-receptor antagonists |
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Authors: | L Felipe Pineda Claus Liebmann Sabine Hensellek Inge Paegelow Torsten Steinmetzer Andrea Schweinitz Jörg Stürzebecher Siegmund Reissmann |
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Institution: | 1. Institute of Biochemistry and Biophysics, Faculty of Biology and Pharmacology, Friedrich-SchillerUniversity of Jena, Philosophenweg 12, D-07743, Jena, Germany 3. Institute of Biochemistry and Biophysics, Faculty of Biology and Pharmacology, Friedrich-SchillerUniversity of Jena, Philosophenweg 12, D-07743, Jena, Germany 4. Institute of Experimental and ClinicalPharmacology and Toxicology, University of Rostock, Schillingallee 70, D-18057, Rostock, Germany 5. Centre for Vascular Biology and Medicine, Clinic of the Friedrich-Schiller University of Jena, Nordh?userstrasse 78, D-99089, Erfurt, Germany
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Abstract: | Summary A series of new non-peptide Bradykinin (BK) B2-receptor antagonists is reported. These new leads belong to a larger set including both commercially or otherwise available
potential candidates found by proprietary database searches using 3D-pharmacophore models as query, and several bis-benzamidino
compounds selected from our tryptase-like protease inhibitor library on the basis of topological considerations, derived from
the same models. Some of these compounds show functional competitive antagonistic activity, inhibiting in vitro the BK-induced
contraction of isolated guinea-pig ileum (GPI) and rat uterus with a pA2 up to 5.3 and 7.0, respectively. They display also binding affinity (IC50 up to 0.56 μM) to the BK B2-receptor in radioligand binding assays on GPI membrane preparations and on human IMR-90 fetal lung fibroblast cells expressing
this receptor subtype. Furthermore, the results with the commercially available compounds, in some cases developed as therapeutics,
show that the used 3D-pharmacophore model allows to predict to some certainty possible side actions of potential drugs. |
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Keywords: | 3D-pharmacophore model guinea pig ileum IMR-90 peptide hormones radioligand binding assay |
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