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Arterioscler Thromb Vasc Biol. 2010 Jul;30(7):1371-7. doi: 10.1161/ATVBAHA.110.206011. Epub 2010 Apr 22.

Single administration of the CXC chemokine-binding protein Evasin-3 during ischemia prevents myocardial reperfusion injury in mice.

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  • 1Cardiology Division, Department of Medicine, Geneva University Hospital, Foundation for Medical Researches, 64 Avenue Roseraie, 1211 Geneva, Switzerland. fabrizio.montecucco@unige.ch

Abstract

OBJECTIVE:

Evasins (chemokine-binding proteins) have been shown to selectively neutralize chemokine bioactivity. We investigated the potential benefits of Evasin-3 on mouse myocardial ischemia/reperfusion injury.

METHODS AND RESULTS:

In vivo and ex vivo (Langendorff model) left coronary artery ligature was performed in C57Bl/6 mice. Coronary occlusion was maintained for 30 minutes, followed by different times (up to 24 hours) of reperfusion. Five minutes after coronary occlusion, mice received 1 intraperitoneal injection of Evasin-3 or vehicle. Infarct size was assessed histologically and by serum cardiac troponin I ELISA. In vitro neutrophil chemotaxis, immunohistology, oxidative stress quantification, real-time RT-PCR analysis of leukocyte chemoattractants, and Western blots for cardioprotective intracellular pathway activation were performed. Evasin-3 reduced infarct size and cardiac troponin I levels compared with vehicle. This effect was associated with the reduction of neutrophil infiltration and reactive oxygen species production within the infarcted myocardium. Evasin-3 did not reduce infarct size in the absence of circulating neutrophils (Langendorff model). Evasin-3 did not influence the activation of intracellular cardioprotective pathways or the expression of leukocyte chemoattractants during early phases of reperfusion.

CONCLUSIONS:

Single administration of Evasin-3 during myocardial ischemia significantly reduced infarct size by preventing CXC chemokine-induced neutrophil recruitment and reactive oxygen species production in myocardial ischemia/reperfusion.

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