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Misoprostol is an analog of prostaglandin E1 (PGE1; Item No. 13010) and an agonist of the PGE2 receptor subtypes EP2 and EP3.1,2,3 It binds to EP1, EP2, EP3-III, and EP4 receptors (Kis = 35.675, 10.249, 0.319, 5.499 μM, respectively) and is selective for EP receptors over DP, FP, IP, and TP receptors (Kis = >100 μM for all).1 Misoprostol inhibits electrically induced twitch contraction in isolated guinea pig ileum circular muscle and vas deferens (EC50s = 102.92 and 4.3 nM, respectively), which endogenously express high levels of EP2 and EP3 receptors, respectively.3,4 It inhibits FMLP-induced superoxide anion generation in human neutrophils (EC50 = 0.35 μM).2 Misoprostol inhibits ethanol-induced gastric lesion formation in rats (ED50 = 0.31 μg/kg).5 Formulations containing misoprostol have been used in the prevention of NSAID-induced gastric ulcers.
WARNING This product is not for human or veterinary use.
1. The utilization of recombinant prostanoid receptors to determine the affinities and selectivities of prostaglandins and related analogs. Biochim. Biophys. Acta 1483(2), 285-293 (2000).
2. Characterization of the PGE receptor subtype mediating inhibition of superoxide production in human neutrophils. Br. J. Pharmacol. 114(7), 1459-1465 (1995).
3. SC-
4. AH13205 -
5. GR63799X -