title: Identification of novel inhibitors of the steroid sulfate carrier 'sodium-dependent organic anion transporter' SOAT (SLC10A6) by pharmacophore modelling.
abstract: The sodium-dependent organic anion transporter SOAT specifically transports sulfated steroid hormones and is supposed to play a role in testicular steroid regulation and male fertility. The present study aimed to identify novel specific SOAT inhibitors for further in vitro and in vivo studies on SOAT function. More than 100 compounds of different molecular structures were screened for inhibition of the SOAT-mediated transport of dehydroepiandrosterone sulfate in stably transfected SOAT-HEK293 cells. Twenty-five of these with IC50 values covering four orders of magnitude were selected as training set for 3D pharmacophore modelling. The SOAT pharmacophore features were calculated by CATALYST and consist of three hydrophobic sites and two hydrogen bond acceptors. By substrate database screening, compound T 0511-1698 was predicted as a novel SOAT inhibitor with an IC50 of 15 μM. This value was confirmed by cell-based transport assays. Therefore, the developed SOAT pharmacophore model demonstrated its suitability in predicting novel SOAT inhibitors.
authors.affiliation: Institute of Pharmacology and Toxicology, Justus Liebig University of Giessen, 35392 Giessen, Germany.
authors.forename: Gary
authors.initials: G
authors.lastname: Grosser
authors.affiliation: Sanofi-Aventis Deutschland GmbH, R&D, LGCR, Structure, Design and Informatics, Building G 878, 65926 Frankfurt am Main, Germany.
authors.forename: Karl-Heinz
authors.initials: KH
authors.lastname: Baringhaus
authors.affiliation: Institute of Pharmacology and Toxicology, Justus Liebig University of Giessen, 35392 Giessen, Germany.
authors.forename: Barbara
authors.initials: B
authors.lastname: Döring
authors.affiliation: Sanofi-Aventis Deutschland GmbH, R&D, LGCR, Structure, Design and Informatics, Building G 878, 65926 Frankfurt am Main, Germany.
authors.forename: Werner
authors.initials: W
authors.lastname: Kramer
authors.affiliation: Institute of Pharmacology and Toxicology, Justus Liebig University of Giessen, 35392 Giessen, Germany.
authors.forename: Ernst
authors.initials: E
authors.lastname: Petzinger
authors.affiliation: Institute of Pharmacology and Toxicology, Justus Liebig University of Giessen, 35392 Giessen, Germany. Electronic address: Joachim.M.Geyer@vetmed.uni-giessen.de.
authors.forename: Joachim
authors.initials: J
authors.lastname: Geyer
mesh_terms: D001647:Bile Acids and Salts / Q000737:chemistry / Q000494:pharmacology; D019314:Dehydroepiandrosterone Sulfate / Q000378:metabolism*; D004353:Drug Evaluation, Preclinical; D057809:HEK293 Cells; D006801:Humans; D020128:Inhibitory Concentration 50; D008958:Models, Molecular; D027361:Organic Anion Transporters / Q000037:antagonists & inhibitors* / Q000737:chemistry*; D021281:Quantitative Structure-Activity Relationship; D015203:Reproducibility of Results
chemical_list: D001647:Bile Acids and Salts; D027361:Organic Anion Transporters; C522730:Slc10a6 protein, human; D019314:Dehydroepiandrosterone Sulfate
keywords: ASBT; DHEAS transport; Inhibitor; Pharmacophore model; SLC10; SOAT