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Published on: March 12, 2016
Bimatoprost and its free acid are prostaglandin FP receptor agonists
N A Sharif1, G W Williams, C R Kelly
1Molecular Pharmacology Unit, Alcon Research, Ltd., 6201 South Freeway, Fort Worth, TX 76134, USA. naj.sharif@alconlabs.com
Abstract:
Bimatoprost (17-phenyl-prostaglandin F(2alpha) ethyl amide) has been reported not to exert its actions via prostaglandin receptors. Here, bimatoprost displaced [3H]prostaglandin F(2alpha) from FP receptors (K(i)=6310+/-1650 nM). Bimatoprost rapidly mobilized intracellular Ca(2+) ([Ca(2+)](i)) via cloned human FP receptors expressed in human embryonic kidney cells (EC(50)=2940+/-1663 nM) and via native FP receptors in 3T3 mouse fibroblasts (EC(50)=2200+/-670 nM). Furthermore, AL-8810 ((5Z, 13E)-(9S,11S,15R)-9,15-dihydroxy-11-fluoro-15-(2-indanyl)-16,17,18,19,20-pentanor-5,13-prostadienoic acid), an FP receptor antagonist, blocked the bimatoprost-induced [Ca(2+)](i) mobilization.
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