Synthesis and pharmacological evaluation of novel nitrobenzenic thromboxane modulators as antiplatelet agents acting on both the alpha and beta isoforms of the human thromboxane receptor.
Thromboxane A(2) (TXA(2)) is an arachidonic acid metabolite involved in pathologies such as stroke, myocardial infarction, and atherosclerosis. Consequently, the design of TXA(2) receptor (TP) antagonists remains of great interest in cardiovascular medicine. The actions of TXA(2) are mediated by its specific G-protein coupled receptor of which two alternative spliced isoforms, TPalpha and TPbeta, have been described in humans. In this study, we report the synthesis of a series of original N-alkyl-N'-[2-(cycloalkyl, alkylaryl)-5-nitrobenzenesulfonyl]urea and N-alkyl-N'-[2-(alkylaryl)-5-nitrobenzenesulfonyl]-N' '-cyanoguanidines and outline their pharmacological evaluation using the individual TPalpha and TPbeta isoforms. Among compounds analyzed, several of them exhibited greater affinity and/or functional activity for either TPalpha or TPbeta. The most promising molecules were also found to be antiplatelet agents. From the present results, structural features involved in isoform selectivity can be proposed, and thereby several lead compounds have been identified for the further development of selective TP isoform antagonists.
Hanson
Julien
J
Laboratory of Medicinal Chemistry, Department of Pharmacy, Natural and Synthetic Drugs Research Centre, University of Liège, 1, Av. de l'Hôpital, B-4000 Liège, Belgium. J.hanson@ulg.ac.be
Reynaud
Denis
D
Qiao
Na
N
Devel
Philippe
P
Moray
Anne-Lise
AL
Renard
Jean-François
JF
Kelley
Leanne P
LP
Winum
Jean-Yves
JY
Montero
Jean-Louis
JL
Kinsella
B Therese
BT
Pirotte
Bernard
B
Pace-Asciak
Cecil R
CR
Dogné
Jean-Michel
JM
D000328:Adult; D000818:Animals; D001667:Binding, Competitive; D019556:COS Cells; D002522:Chlorocebus aethiops; D006146:Guanidines / Q000138:chemical synthesis* / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D009578:Nitrobenzenes / Q000138:chemical synthesis* / Q000494:pharmacology; D010974:Platelet Aggregation / Q000187:drug effects; D010975:Platelet Aggregation Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology; D020033:Protein Isoforms / Q000187:drug effects; D011869:Radioligand Assay; D044244:Receptors, Thromboxane A2, Prostaglandin H2 / Q000037:antagonists & inhibitors*; D013450:Sulfones / Q000138:chemical synthesis* / Q000494:pharmacology; D014508:Urea / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000494:pharmacology
D006146:Guanidines; D009578:Nitrobenzenes; D010975:Platelet Aggregation Inhibitors; D020033:Protein Isoforms; D044244:Receptors, Thromboxane A2, Prostaglandin H2; D013450:Sulfones; D014508:Urea