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The FASEB Journal, Vol 3, 1941-1948, Copyright © 1989 by The Federation of American Societies for Experimental Biology

REVIEWS

Eicosanoid biosynthesis and action: novel opportunities for pharmacological intervention

S Nicosia and C Patrono
Institute of Pharmacological Sciences, University of Milan, Italy.

Novel eicosanoid biosynthetic pathways and receptors are reviewed as potential targets for pharmacological intervention. In addition to the cyclooxygenase and lipoxygenase pathways of arachidonate metabolism, a cytochrome P450-dependent monooxygenase has been identified in corneal and renal epithelial cells. Elucidation of the enzymatic pathways of thromboxane (TX) disposition and development of analytical techniques for measuring urinary metabolites have allowed a reliable assessment of TXA2 biosynthesis in health and disease, and provide a rationale for the combined use of TX-synthase inhibitors and TXA2-receptor antagonists in the setting of platelet activation. Recent evidence for a transcellular metabolism of neutrophil-derived leukotriene (LT) A4 by other human blood cells might link platelet and neutrophil activation to the occurrence of vasospastic phenomena. Prostacyclin (PG1(2)), PGE2, PGD2, TXA2/PGH2, and sulfidopeptide-LT receptors are being characterized in terms of distribution, signal-transduction mechanisms, and agonist-mediated regulation. Development of relatively selective agonists and antagonists of these receptors is providing novel therapeutic strategies for several human diseases.


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Copyright © 1989 by The Federation of American Societies for Experimental Biology.