Eicosanoids are lipid mediators of inflammation; they includea variety of compounds (prostaglandins, thromboxanes, leukotrienes,hydroxy- and epoxy-fatty acids, lipoxins, and isoprostanes)that are derived from the ubiquitous 20-carbon atom arachidonate(20 in Greek is "eicosa") and a few similar polyunsaturatedfatty acids. These fatty acids are esterified in the phospholipidsof biologic membranes and then released in response to a varietyof stimuli to become substrates for metabolizing enzymes. Morethan 20 years ago, Samuelsson and coworkers identified leukotrienesas a class of eicosanoids that are derived through the actionof 5-lipoxygenase. This enzyme, which is selectively expressedin . . . [Full Text of this Article]
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From the Division of Cardiology and the Center of Excellence on Aging, Gabriele d'Annunzio University, Chieti (R.D.C.); and the Laboratory for Thrombosis and Vascular Research, Institute of Clinical Physiology, National Research Council, Pisa (R.D.C., A.Z.) both in Italy.
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