Role Of Endothelin-1 And Thromboxane A2 In The Pulmonary Hypertension Induced By Heparin-protamine Interaction In Anesthetized Dogs

dc.creatorFreitas C.F.
dc.creatorFaro R.
dc.creatorDragosavac D.
dc.creatorClozel M.
dc.creatorDe Nucci G.
dc.creatorAntunes E.
dc.date2004
dc.date2015-06-26T14:23:36Z
dc.date2015-11-26T14:12:03Z
dc.date2015-06-26T14:23:36Z
dc.date2015-11-26T14:12:03Z
dc.date.accessioned2018-03-28T21:12:38Z
dc.date.available2018-03-28T21:12:38Z
dc.identifier
dc.identifierJournal Of Cardiovascular Pharmacology. , v. 43, n. 1, p. 106 - 112, 2004.
dc.identifier1602446
dc.identifier10.1097/00005344-200401000-00016
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0346333124&partnerID=40&md5=3ae966c70e4493ebf45fc805db94a950
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/94210
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/94210
dc.identifier2-s2.0-0346333124
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1241890
dc.descriptionThis study aimed to study the role of thromboxane A2 (TXA 2) and endothelin-1 (ET-1) in the pulmonary hypertension induced by interaction of heparin-protamine in anesthetized dogs. The effect of inhaled nitric oxide (NO) was also investigated in this model. Dogs were anesthetized and instrumented for acquisition of mean arterial blood pressure, mean arterial pulmonary pressure (MPAP), and pulmonary pressure gradient (PPG). Cardiac index (CI), heart rate, and index of systemic vascular resistance were also obtained. Intravenous administration of heparin (500 IU/kg) 3 minutes before protamine (10 mg/kg) caused marked pulmonary hypertension, as evaluated by the increase in MPAP and PPG. This was accompanied by systemic hypotension, CI decrease, and tachycardia. Indomethacin (10 mg/kg), dazoxiben (10 mg/kg), or tezosentan (10-mg/kg bolus plus 10-mg/kg/h infusion) significantly reduced the increase in MPAP and PPG, but had no effect on the systemic hypotension. Similar results were obtained with inhaled NO (3 ppm). Plasma TXB2 levels were markedly elevated during the pulmonary hypertension, and this was abolished in indomethacin-treated dogs. Our study shows that interaction of heparin-protamine in anesthetized dogs lead to TXA2- and ET-1-mediated pulmonary hypertension. Drugs that interfere with the synthesis of these mediators as well as inhaled NO may be of beneficial value to control this disorder.
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dc.languageen
dc.publisher
dc.relationJournal of Cardiovascular Pharmacology
dc.rightsfechado
dc.sourceScopus
dc.titleRole Of Endothelin-1 And Thromboxane A2 In The Pulmonary Hypertension Induced By Heparin-protamine Interaction In Anesthetized Dogs
dc.typeArtículos de revistas


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