PMID- 3122356 OWN - NLM STAT- MEDLINE DCOM- 19880202 LR - 20190727 IS - 0049-3848 (Print) IS - 0049-3848 (Linking) VI - 48 IP - 1 DP - 1987 Oct 1 TI - Acute myocardial infarction: measurement of arachidonate end-products in whole blood as an index of platelet cyclo-oxygenase activity in vivo. PG - 63-71 AB - The endogenous arachidonic acid metabolism was investigated ex vivo, in separated serum from clotted whole blood, soon after the onset of acute myocardial infarction (3.3 +/- 0.7 hr). A group of eight consecutive male patients was selected, since no evidence was obtained of any associated disease known to increase platelet activity or any recent exposure to cyclo-oxygenase inhibitors. This group of patients compared to an age and sex matched control group showed a large decrease in the platelet cyclo-oxygenase end-products in whole blood: thromboxane B2 (TXB2), 12-hydroxy-5-cis, 8-cis, 10-trans-heptadecatrienoic acid (HHT) and 6-keto-PGF1 alpha (p less than .01). In addition, platelet lipoxygenase produced an increased amount of 12-hydroperoxy-5,8,10,14-eicosatetraenoic acid (12-HPETE) as measured by its reduced metabolite 12-HETE (p less than .05). Furthermore, the TXB2 plasma concentration was significantly elevated in patients (p less than .01), confirming the enhanced platelet reactivity during the early stages of acute myocardial infarction. These results point out that a decreased level of cyclo-oxygenase end-products and an increased level of lipoxygenase end-product in serum is consistent with a previous in vivo cyclo-oxygenase hyperactivity. FAU - Rousson, D AU - Rousson D AD - Institut Pasteur, INSERM U63, Faculte Alexis Carrel, Lyon, France. FAU - Lagarde, M AU - Lagarde M FAU - Touboul, P AU - Touboul P FAU - Dechavanne, M AU - Dechavanne M LA - eng PT - Journal Article PL - United States TA - Thromb Res JT - Thrombosis research JID - 0326377 RN - 0 (Arachidonic Acids) RN - 0 (Fatty Acids, Unsaturated) RN - 0 (Hydroxyeicosatetraenoic Acids) RN - 27YG812J1I (Arachidonic Acid) RN - 50683-78-8 (12-hydroxy-5,8,10-heptadecatrienoic acid) RN - 54397-85-2 (Thromboxane B2) RN - 58962-34-8 (6-Ketoprostaglandin F1 alpha) RN - 59985-28-3 (12-Hydroxy-5,8,10,14-eicosatetraenoic Acid) RN - EC 1.13.11.12 (Lipoxygenase) RN - EC 1.14.99.1 (Prostaglandin-Endoperoxide Synthases) SB - IM MH - 12-Hydroxy-5,8,10,14-eicosatetraenoic Acid MH - 6-Ketoprostaglandin F1 alpha/blood MH - Arachidonic Acid MH - Arachidonic Acids/*metabolism MH - Blood Platelets/*enzymology MH - Fatty Acids, Unsaturated/blood MH - Humans MH - Hydroxyeicosatetraenoic Acids/blood MH - Lipoxygenase/metabolism MH - Male MH - Middle Aged MH - Myocardial Infarction/*blood/metabolism MH - Prostaglandin-Endoperoxide Synthases/*metabolism MH - Thromboxane B2/blood EDAT- 1987/10/01 00:00 MHDA- 1987/10/01 00:01 CRDT- 1987/10/01 00:00 PHST- 1987/10/01 00:00 [pubmed] PHST- 1987/10/01 00:01 [medline] PHST- 1987/10/01 00:00 [entrez] AID - 0049-3848(87)90346-X [pii] AID - 10.1016/0049-3848(87)90346-x [doi] PST - ppublish SO - Thromb Res. 1987 Oct 1;48(1):63-71. doi: 10.1016/0049-3848(87)90346-x.