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Prostaglandin F2α ethanolamide (PGF2α-EA) is produced by COX-2 metabolism of the endogenous cannabinoid, arachidonoyl ethanolamide (AEA), found in brain, liver, and other mammalian tissues.1 AEA can be metabolized directly by the sequential action of COX-2 and specific PG synthases to produce ethanolamide congeners of the classical PGs.2,3 PGF2α-EA has also been reported to be biosynthesized by this mechanism when AEA was infused into the lung and liver of living mice. PGF2α-EA is a potent dilator (EC50 = 58 nM) of the cat iris sphincter, which is a model system for testing potential intraocular hypotensive agents.4
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1. Fatty acid amides of ethanolamine in mammalian tissues. The Journal of Biological Chemisty 240, 1019-1024 (1965).
2. Synthesis of prostaglandin E2 ethanolamide from anandamide by cyclooxygenase-
3. Metabolism of the endocannabinoids, 2-
4. Prostaglandin F2α (PGF2α) 1-
Structural determinants for calcium mobilization by prostaglandin E2 and prostaglandin F2α glyceryl esters in RAW 264.7 cells and H1819 cells. Prostaglandins Other Lipid Mediat. 92(1-4), 19-24 (2010).