Words similar to cyclooxygenase
Example sentences for: cyclooxygenase
How can you use “cyclooxygenase” in a sentence? Here are some example sentences to help you improve your vocabulary:
With this inhibition, new production of cyclooxygenase products is blocked.
Prostaglandin E 2 is a major cyclooxygenase metabolite of arachidonic acid which exerts diverse effects on vascular smooth muscle tone and epithelial solute transport via G-protein coupled receptors [ 1 2 ] . At least four distinct G-protein coupled PGE 2 receptors have been cloned: the EP 1 , EP 2 , EP 3 , and EP 4 [ 1 ] . Pharmacological studies suggest PGE 2 relaxes vascular smooth muscle through two of these receptors, the EP 2 and EP 4 receptors, which couple to cyclic-AMP generation [ 3 ] . In contrast, PGE 2 constricts other vascular smooth muscle through EP 3 receptors which inhibit cAMP generation via G i or EP 1 receptors which increase Ca 2+mobilization [ 3 ] . Although both EP 2 and EP 4 receptors relax smooth muscle, EP 2 receptors are uniquely sensitive to the agonists butaprost and AH13205 [ 3 4 ] . Previous studies have shown that PGE 2 increases the cAMP concentration in many tissues including kidney, intestine and uterus, but the relative contribution of EP 2 versus EP 4 receptors to these effects is incompletely defined [ 5 6 ] . Recent studies in mice with targeted disruption of these receptors have suggested an important role for EP2 receptor in regulating systemic hemodynamics.
One of the proposed mechanisms for the chemopreventive properties of aspirin and other NSAIDs points to the observation that NSAIDs inhibit prostaglandin (PG)-endoperoxide synthase (cyclooxygenase) enzymes [ 24 ] , of which two forms of similar enzymatic activity exist, COX-1 and COX-2.
COX: cyclooxygenase
It has been proposed that vitamin E may incorporate into cellular membranes by association of the tocopherol side chain with the polyenoic fatty acid residues in the membrane fatty acids [ 15 19 ] . This interaction may stabilize cell membranes by making highly unsaturated fatty acids less liable to peroxidation as well as by making highly unsaturated fatty acids less available for phospholipid hydrolysis by phospholipase [ 15 16 ] . The latter action may reduce mobilization of arachidonic acid (AA) from the membranes and in this way reduce the amount of AA available as a substrate to cyclooxygenase and/or lipoxygenase to produce eicosanoids with mitogenic and with inflammatory properties [ 17 20 ] . Other possible antitumor actions include: induction of apoptosis, interference with hormone production, modulation of cellular signaling and gene transcription, and induction of differentiation [ 4 21 22 23 24 ] .
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