Nitrooxymethyl-substituted analogues of rofecoxib: synthesis and pharmacological characterization.
Nitrooxymethyl-substituted derivatives of Rofecoxib were synthesized and tested for their cyclooxygenase (COX)-inhibiting activity in whole human blood, vasodilator potency on rat aorta strips, and for their capacity of inhibiting platelet aggregation of human platelet-rich plasma. The results show that their potency and selectivity in inhibiting COX isoforms, as well as their anti-aggregatory properties, are closely dependent on the position at which the NO-donor nitrooxymethyl function is introduced into the Rofecoxib scaffold. All the products were capable of dilating rat aorta strips precontracted with phenylephrine in a dose-dependent manner, through a cGMP-dependent mechanism. Compound 10 emerged as a quite potent COX-2-selective inhibitor endowed with good vasodilator activity. Interestingly, compound 19 behaved as a potent selective COX-1 inhibitor, and displayed good vasodilator and anti-aggregatory properties. The hydroxymethyl derivatives, potential metabolites of the nitrooxymethyl analogues, were similarly studied for a comparison.
Boschi
Donatella
D
Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Via Pietro Giuria 9, I-10125 Torino.
Cena
Clara
C
Di Stilo
Antonella
A
Rolando
Barbara
B
Manzini
Paola
P
Fruttero
Roberta
R
Gasco
Alberto
A
D000818:Animals; D051545:Cyclooxygenase 1 / Q000737:chemistry / Q000378:metabolism; D051546:Cyclooxygenase 2 / Q000737:chemistry / Q000378:metabolism; D052246:Cyclooxygenase 2 Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D007783:Lactones / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D010975:Platelet Aggregation Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D051381:Rats; D013450:Sulfones / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D014665:Vasodilator Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
D052246:Cyclooxygenase 2 Inhibitors; D007783:Lactones; D010975:Platelet Aggregation Inhibitors; D013450:Sulfones; D014665:Vasodilator Agents; C116926:rofecoxib; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2