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9 резултата
N-hydroxy-pyrroline modification of verapamil exhibits antioxidant protection of the heart against ischemia/reperfusion-induced cardiac dysfunction without compromising its calcium antagonistic activity.
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Any clinical intervention (e.g., coronary angioplasty, thrombolysis) used to reintroduce blood flow to an ischemic region of the myocardium is accompanied by a complex enzymatic cascade of reactions resulting in severe injury to the heart, termed myocardial ischemia/reperfusion (I/R) injury. In this
The radical trap 5,5-dimethyl-1-pyrroline N-oxide exerts dose-dependent protection against myocardial ischemia-reperfusion injury through preservation of mitochondrial electron transport.
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Free radicals are important mediators of myocardial ischemia-reperfusion injury. Nitrone spin traps have been shown to scavenge free radicals. The cardioprotective effect of the spin trap, 5,5-dimethyl-1-pyrroline N-oxide (DMPO), was investigated in an isolated heart model of global ischemia and
Ischemia-induced norepinephrine release, but not norepinephrine-derived free radicals, contributes to myocardial ischemia-reperfusion injury.
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BACKGROUND
Norepinephrine (NE)-derived free radicals may contribute to myocyte injury after ischemia -reperfusion, so the influence of sympathetic denervation on myocardial ischemia - reperfusion injury was investigated in the present study.
RESULTS
Cardiac sympathetic denervation was produced in
Attenuation of myocardial ischemia-reperfusion injury by trimetazidine derivatives functionalized with antioxidant properties.
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Trimetazidine (TMZ), an anti-ischemic metabolic drug, is used to treat chest pain (angina pectoris). We hypothesized that derivatives of TMZ with antioxidant functions may improve the cardiac dysfunction caused by ischemia-reperfusion (I/R) above that observed with TMZ alone. Isolated rat hearts
Detection of oxygen-derived free radical generation in the canine postischemic heart during late phase of reperfusion.
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To define the relation between oxygen-derived free radical (oxy-radical) generation in the reperfused ischemic myocardium and the progression of myocardial damage, we measured oxy-radical generation in the ischemic myocardium and the propagating infarct size in a model of canine coronary occlusion
[Detection and characterization of free radicals, radical scavenging activity, and lipid peroxides in cerebral ischemia-reperfusion injury by electron spin resonance and chemiluminescence high-performance liquid chromatography].
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During the ischemia-reperfusion period, the hypoxanthine-xanthine oxidase system simultaneously generates superoxide (O2-). O2- has an extremely short half-life, as it rapidly undergoes Fenton-type reactions in the presence of iron and yields highly cytotoxic hydroxyl radicals (.OH). Oxygen-derived
Measurement and characterization of free radical generation in reoxygenated human endothelial cells.
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The endothelial cell is thought to be an important site of free radical generation in ischemic tissues. It has been demonstrated that endothelial cells from several species generate a burst of free radical generation upon reoxygenation; however, it has been suggested that human endothelial cells are
Apelin-12 and its structural analog enhance antioxidant defense in experimental myocardial ischemia and reperfusion.
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This study investigated the effects of peptide apelin-12 (H-Arg-Pro-Arg-Leu-Ser-His-Lys-Gly-Pro-Met-Pro-Phe-OH, A12) and its novel structural analog (H-(N(α)Me)Arg-Pro-Arg-Leu-Ser-His-Lys-Gly-Pro-Nle-Pro-Phe-OH, AI) on myocardial antioxidant enzyme activities, lipid peroxidation, and reactive oxygen
Effects of an antiarrhythmic drug A-2545 on canine ventricular arrhythmia models; comparison with mexiletine and flecainide.
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We investigated effects of a new Na+ channel blocking antiarrhythmic drug, A-2545, N-3 (2,2,5,5-tetramethyl-3-pyrroline-3-carboxamido)-propyl-phthalimide-hydro chloride, on various canine ventricular automaticity arrhythmias induced by two-stage coronary ligation, digitalis and adrenaline, and
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