title: The development of a whole-cell based medium throughput screening system for the discovery of human aldosterone synthase (CYP11B2) inhibitors: old drugs disclose new applications for the therapy of congestive heart failure, myocardial fibrosis and hypertension.
abstract: Cytochrome P450 enzymes play an important role in steroid hormone biosynthesis of the human adrenal gland, e.g., the production of cortisol and aldosterone. Aldosterone, the most important human mineralocorticoid, is involved in the regulation of the salt and water homeostasis of the body and thus in the regulation of blood pressure, whereas cortisol is the most important glucocorticoid of the human body. CYP11B-dependent steroid hydroxylases are drug development targets, and since they are very closely related enzymes, the discovery of selective inhibitors has been subject to intense investigations for several years. Here we report the development of a whole-cell medium throughput screening technology for the discovery of CYP11B2 inhibitors. The new screening system displayed high reproducibility and was applied to investigate a library of pharmacologically active compounds. 1268 compounds were investigated during this study which revealed 5 selective inhibitors of CYP11B2 (after validation against CYP11B1). The new inhibitors of CYP11B2 are already existing drugs that could be used either in the treatment of hyperaldosteronism-related diseases or as lead compounds that could further be optimised to achieve safer and selective inhibitors of aldosterone synthase. Article from the Special issue on 'Targeted Inhibitors'.
authors.affiliation: Institute of Biochemistry, P.O. Box 151150, Saarland University, D-66041 Saarbrücken, Germany.
authors.forename: Tarek
authors.initials: T
authors.lastname: Hakki
authors.forename: Katja
authors.initials: K
authors.lastname: Hübel
authors.forename: Herbert
authors.initials: H
authors.lastname: Waldmann
authors.forename: Rita
authors.initials: R
authors.lastname: Bernhardt
mesh_terms: D000450:Aldosterone / Q000737:chemistry / Q000378:metabolism; D019405:Cytochrome P-450 CYP11B2 / Q000037:antagonists & inhibitors* / Q000235:genetics / Q000378:metabolism; D055808:Drug Discovery; D004353:Drug Evaluation, Preclinical / Q000379:methods*; D005355:Fibrosis / Q000188:drug therapy* / Q000201:enzymology / Q000473:pathology; D006333:Heart Failure / Q000188:drug therapy* / Q000201:enzymology; D006801:Humans; D006973:Hypertension / Q000188:drug therapy* / Q000201:enzymology; D015394:Molecular Structure; D009206:Myocardium / Q000201:enzymology / Q000473:pathology*; D015203:Reproducibility of Results; D012568:Schizosaccharomyces / Q000235:genetics / Q000378:metabolism; D013256:Steroids / Q000737:chemistry / Q000378:metabolism
chemical_list: D013256:Steroids; D000450:Aldosterone; D019405:Cytochrome P-450 CYP11B2