Effects of Melatonin on Reperfusion Injury

Effects of Melatonin on Reperfusion Injury in Patients With ST-segment Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention

Acute myocardial infarction is a major cause of mortality and morbidity. Primary percutaneous coronary intervention (pPCI) is currently the most effective treatment strategy in acute myocardial infarction. However, a sizable number of patients fail to restore optimal myocardial reperfusion, mostly because of the 'no-reflow' phenomenon. Melatonin is the chief indoleamine produced by the pineal gland, and a well-known antioxidant and free radical scavenger. Several studies have shown that melatonin protects against ischemia/reperfusion injury (IRI). In our previous study, melatonin markedly reduced infarcted area, improved cardiac function and reduced lactate dehydrogenase release in rats. The investigators planned to research the cardioprotective effects of intravenous melatonin administered prior to reperfusion and continued after restoration of coronary blood flow in patients with ST segment elevation myocardial infarction undergoing pPCI.

Patients with ST-segment elevation myocardial infarction undergoing primary percutaneous coronary intervention

Patients will receive a total intravenous melatonin (Helsinn Chemical Co, Biasca, Switzerland) dose of 11.61 mg (aproximately 166 μg/kg). The dose will be distributed in a volume of 500 ml of an isotonic and sterile solution of 100 μM melatonin during 150 min with a drip rate of 4.2 ml/min. The temporal distribution of perfusion will be: 30 min previous to percutaneous revascularization and remainder doses in a subsequent 120 min (1 h during the angioplasty +60 min post-intervention).

The temporal distribution of perfusion will be: 30 min previous to percutaneous revascularization and remainder doses in a subsequent 120 min (1 h during the angioplasty +60 min post-intervention).

Inclusion Criteria: ST segment elevation myocardial infarction undergoing primary percutaneous poronary intervention Exclusion Criteria: unconscious at presentation had cardiogenic shock had a history of myocardial infarction stent thrombosis renal insufficiency had previously undergone coronary artery bypass surgery

Dominguez-Rodriguez A, Abreu-Gonzalez P, de la Torre-Hernandez JM, Consuegra-Sanchez L, Piccolo R, Gonzalez-Gonzalez J, Garcia-Camarero T, Del Mar Garcia-Saiz M, Aldea-Perona A, Reiter RJ; MARIA Investigators. Usefulness of Early Treatment With Melatonin to Reduce Infarct Size in Patients With ST-Segment Elevation Myocardial Infarction Receiving Percutaneous Coronary Intervention (From the Melatonin Adjunct in the Acute Myocardial Infarction Treated With Angioplasty Trial). Am J Cardiol. 2017 Aug 15;120(4):522-526. doi: 10.1016/j.amjcard.2017.05.018. Epub 2017 May 30.

Zhou H, Zhang Y, Hu S, Shi C, Zhu P, Ma Q, Jin Q, Cao F, Tian F, Chen Y. Melatonin protects cardiac microvasculature against ischemia/reperfusion injury via suppression of mitochondrial fission-VDAC1-HK2-mPTP-mitophagy axis. J Pineal Res. 2017 Aug;63(1):e12413. doi: 10.1111/jpi.12413. Epub 2017 Apr 27.

Dominguez-Rodriguez A, Abreu-Gonzalez P, Garcia-Gonzalez MJ, Kaski JC, Reiter RJ, Jimenez-Sosa A. A unicenter, randomized, double-blind, parallel-group, placebo-controlled study of Melatonin as an Adjunct in patients with acute myocaRdial Infarction undergoing primary Angioplasty The Melatonin Adjunct in the acute myocaRdial Infarction treated with Angioplasty (MARIA) trial: study design and rationale. Contemp Clin Trials. 2007 Jul;28(4):532-9. doi: 10.1016/j.cct.2006.10.007. Epub 2006 Oct 17.