PF 04418948

PF-04418948 is a novel, potent and selective prostaglandin EP2 receptor antagonist with IC50 of 16 nM, displays >2000-fold functional selectivity for the human EP2 receptor over antagonist activity against the human EP1, EP3, EP4, DP1 and CRTH2 receptors.IC50 value: 16 nMTarget: EP2in vitro: PF-04418948 inhibits prostaglandin E2 (PGE2)-induced increase in cAMP in cells expressing EP2 receptors with a functional KB value of 1.8 nM. In human myometrium, PF-04418948 produced a parallel, rightward shift of the butaprost-induced inhibition of the contractions induced by electrical field stimulation with an apparent KB of 5.4 nM. [1]in vivo: In dog bronchiole and mouse trachea, PF-04418948 produced parallel rightward shifts of the PGE2-induced relaxation curve with a KB of 2.5 nM and an apparent KB of 1.3 nM respectively. Reversal of the PGE2-induced relaxation in the mouse trachea by PF-04418948 produced an IC50 value of 2.7 nM. Given orally, PF-04418948 attenuated the butaprost-induced cutaneous blood flow response in rats. [1] PF-04418948 competitively inhibits relaxations of murine and guinea pig trachea induced by ONO-AE1-259 and PGE2 respectively.[2]

Signaling Pathways >> GPCR/G Protein >> Prostaglandin Receptor

Research Areas >> Cancer

[1]. af Forselles KJ, et al. In vitro and in vivo characterization of PF-04418948, a novel, potent and selective prostaglandin EP2 receptor antagonist. Br J Pharmacol. 2011 Dec;164(7):1847-1856.

[2]. Birrell MA, et al. Selectivity profiling of the novel EP2 receptor antagonist, PF-04418948, in functional bioassay systems: atypical affinity at the guinea pig EP2 receptor. Br J Pharmacol. 2013 Jan;168(1):129-138.

Dinoprostone | Prostaglandin E1 | E7046 | ONO-AE3-208 | Fevipiprant | grapiprant | TG6-10-1 | Taprenepag | GW 627368 | MRE-269 | Ramatroban | AH 6809 | Laropiprant | AZD1981 | Evatanepag