title: Polyoxometalates--a new class of potent ecto-nucleoside triphosphate diphosphohydrolase (NTPDase) inhibitors.
abstract: Polyoxotungstates were identified as potent inhibitors of NTPDases1, 2, and 3. The most potent compound was K(6)H(2)[TiW(11)CoO(40)], exhibiting K(i) values of 0.140 microM (NTPDase1), 0.910 microM (NTPDase2), and 0.563 microM (NTPDase3). One of the compounds, (NH(4))(18)[NaSb(9)W(21)O(86)], was selective for NTPDases2 and 3 versus NTPDase1. NTPDase inhibition might contribute to the described biological effects of polyoxometalates, including their anti-cancer activity.
authors.affiliation: Pharmaceutical Institute, Pharmaceutical Sciences Bonn (PSB), University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany. christa.mueller@uni-bonn.de <christa.mueller@uni-bonn.de>
authors.forename: Christa E
authors.initials: CE
authors.lastname: Müller
authors.forename: Jamshed
authors.initials: J
authors.lastname: Iqbal
authors.forename: Younis
authors.initials: Y
authors.lastname: Baqi
authors.forename: Herbert
authors.initials: H
authors.lastname: Zimmermann
authors.forename: Anita
authors.initials: A
authors.lastname: Röllich
authors.forename: Holger
authors.initials: H
authors.lastname: Stephan
mesh_terms: D000251:Adenosine Triphosphatases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D001081:Apyrase / Q000037:antagonists & inhibitors* / Q000378:metabolism; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000145:classification* / Q000494:pharmacology*; D008958:Models, Molecular; D015394:Molecular Structure; D011755:Pyrophosphatases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D015703:Antigens, CD; D004791:Enzyme Inhibitors; D000251:Adenosine Triphosphatases; D011755:Pyrophosphatases; C027201:ectoATPase; C439652:nucleoside-triphosphate diphosphohydrolase 3; D001081:Apyrase; C067869:CD39 antigen