Caspase inhibition and limitation of myocardial infarct size: protection against lethal reperfusion injury.
BRIT J PHARMACOL
197 - 200.
Ischaemia-reperfusion injury causes cell death by both necrosis and apoptosis. Caspase activation is a major event in apoptosis. We therefore examined the effect of caspase inhibitors during reperfusion upon myocardial infarction. Rat isolated hearts were subjected to 35 min coronary occlusion and 120 min reperfusion. Treatment groups were perfused with caspase inhibitors during early reperfusion. We assessed a non-selective caspase inhibitor (Z-VAD.fmk, 0.1 mu M), a caspase-8 inhibitor (Z-IETD.fmk, 0.07 mu M), a caspase-9 inhibitor (Z-LEHD.fmk, 0.07 mu M) and a caspase-3 inhibitor (Ac-DEVD.cmk, 0.07 mu M). All caspase inhibitors limited infarct size (infarct-risk ratio per cent: control 38.5 +/- 2.6; Z-VAD.fmk 24.6 +/- 3.4; Z-LEHD.fmk 19.3 +/- 2.4; Z-IETD.fmk 23.0 +/- 5.4; Ac-DEVD.cmk 27.8 +/- 3.3; P < 0.05 when compared with control value, I-way ANOVA). We conclude that caspase inhibition during early reperfusion protects myocardium against lethal reperfusion injury.
|Title:||Caspase inhibition and limitation of myocardial infarct size: protection against lethal reperfusion injury|
|Keywords:||caspases, caspase inhibitors, infarct size, myocardium, reperfusion, CELL-DEATH, ISCHEMIA-REPERFUSION, APOPTOSIS, HEART|
|UCL classification:||UCL > School of Life and Medical Sciences
UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences
UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science
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