ONO-AE3-208

Biochem/physiol Actions

ONO-AE3-208 is an orally active prostaglandin E2 receptor 4 (EP4)-selective antagonist (Ki in nM = 1.3/EP4, 30/EP3, 790/FP and 2400/TP; Ki >10 µM for prostanoid receptors DP, EP1, EP2, IP). Both EP4-/- mice and ONO-AE3-208-treated wild-type mice (10 mg/kg/day in drinking water) are shown to develop severe symptoms (diarrhea, hemoccult, weight loss) in a murine model of DSS-induced colitis. ONO-AE3-208 is also reported to promote ductus arteriosus constriction among fetal and neonatal rats in vivo (10 mg/kg administered orogastrically). In addition, ONO-AE3-208 is demonstrated to effectively inhibit 1 ng/mL IL-1β-induced HUVEC migration in vitro (53% and 75% inhibition by 1 or 10 µM AE3-208, repectively) and block IL-1β (30 ng/Hydron pellet implant)-induced angionesis in mouse corneas in vivo (1 mg/kg/day p.o.).