نتایج جستجو برای: oxygen free radicals

تعداد نتایج: 716531  

2005
CHRISTOPHER J BURRELL DAVID R BLAKE

Thrombolytic treatment in acute myocardial infarction achieves coronary patency in most patients.' Mortality in groups treated early after the onset of symptoms is significantly reduced,' but left ventricular function does not always improve.5 Myocardial necrosis during the period of vessel occlusion is partly responsible for the irreversible ventricular impairment that occurs even when the ves...

Journal: :British heart journal 1991
J J Belch A B Bridges N Scott M Chopra

Plasma lipid peroxides (malondialdehyde) and thiols were measured in 45 patients with congestive heart failure and 45 controls. Malondialdehyde concentrations were significantly higher in the patients with congestive heart failure (median 9.0 nmol/ml interquartile range (IQR) 7.9-10.2) than in the controls (median 7.7 nmol/ml (IQR 6.9-9.2)). Plasma thiols were significantly lower in congestive ...

2005
Elena E. Ustinova Harold D. Schultz

Myocardial ischemia and reperfusion can evoke excitation of cardiac vagal afferent nerve endings and activation of a cardiogenic depressor reflex (Bezold-Jarisch effect). We postulate that oxygen-derived free radicals, which are well known to be produced during prolonged ischemia and reperfusion, contribute to this excitation. Hydroxyl radicals derived from hydrogen peroxide (H202) activate abd...

Journal: :The British journal of ophthalmology 1996
N A Rao G S Wu

Journal: :HPB Surgery 1995
E. Akpinar I. Özden N. Savci A. Emre

The role of free oxygen radicals in experimental acute pancreatitis induced by common bile duct ligation was investigated by measuring malondialdehyde levels in the rat pancreas. Also, the potential role of leucocytes as the source of free oxygen radicals was tested by inducing leukopenia with methotrexate. The malondialdehyde levels in the control, pancreatitis and pancreatitis + methotrexate ...

Journal: :Journal of pharmacological methods 1986
C V Jackson J K Mickelson K Stringer P S Rao B R Lucchesi

Oxygen-derived free radicals and other oxidizing species are thought to be involved in inflammation and ischemic tissue injuries. Recently, oxygen-derived free radicals also have been implicated in tissue injury of the myocardium subjected to ischemia/reperfusion. The purpose of this investigation was to determine if electrolysis of a physiological buffer would serve as a source of free radical...

Journal: :Journal of cell science 2003
Vadim Demidchik Sergey N Shabala Katherine B Coutts Mark A Tester Julia M Davies

Free oxygen radicals are an irrefutable component of life, underlying important biochemical and physiological phenomena in animals. Here it is shown that free oxygen radicals activate plasma membrane Ca(2+)- and K(+)-permeable conductances in Arabidopsis root cell protoplasts, mediating Ca(2+) influx and K(+) efflux, respectively. Free oxygen radicals generate increases in cytosolic Ca(2+) medi...

Journal: :IUBMB Life (International Union of Biochemistry and Molecular Biology: Life) 2004

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