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• W2043731460 abstract "CGS 21680 (2-[p-(2-carboxyethyl)phenylethylamino]-5'-N-ethylcarboxamidoadenosine) is an adenosine agonist that has been reported recently to bind selectively to adenosine A2 receptors in rat brain. This adenosine agonist, and the parent compound NECA (5'-N-ethylcarboxamidoadenosine), were found to be potent vasorelaxants of prostaglandin F2α (PGF2α) precontracted porcine coronary smooth muscle with EC50s of 4.5 and 9.7 nM, respectively. Schild analysis of the inhibition of CGS 21680, NECA and 2-chloroadenosine induced relaxation of the porcine coronary artery by CGS 15943 (9-chloro-2-(2-furanyl)[1,2,4]triazolo[1,5-C]quinazolin-5-amine), an A2 receptor antagonist, yielded identical pA2values for the antagonist (approximately 9.3). This indicates that the same receptor mediates the effects of these three adenosine agonists. NECA and CGS 21680 were equipotent in most vascular preparations except in the canine coronary artery. Porcine coronary arterial rings contracted with PGF2α were relaxed by NECA or CGS 21680 as well as by nitroprusside; those contracted with KC1 (40 mM) were relaxed only by nitroprusside. In rabbit aorta, contractions induced by phenylephrine or PGF2αwere inhibited by nitroprusside but not by NECA or CGS 21680. Thus, the adenosine A2 receptor agonists, NECA and CGS 21680, are potent vasorelaxants that display regional vascular and species variations that differ from those of nitroprusside." @default.
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• W2043731460 date "1991-04-01" @default.
• W2043731460 modified "2023-09-25" @default.
• W2043731460 title "Comparative effects of a selective adenosine A2 receptor agonist, CGS 21680, and nitroprusside in vascular smooth muscle" @default.
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• W2043731460 doi "https://doi.org/10.1016/0014-2999(91)90416-n" @default.
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