Xanthine oxidoreductase activity in perfused hearts of various species, including humans.

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Xanthine oxidoreductase activity in perfused hearts of various species, including humans.

Oxygen free radicals generated by xanthine oxidase have been implicated in cardiac damage. The activity of xanthine oxidase/reductase in adult rat heart is considerable. Its assay gives controversial results for other species, for example, rabbits and humans. Therefore, we perfused isolated hearts of various species, including explanted human hearts, to measure the conversion of exogenous hypox...

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Xanthine Oxidoreductase Activit in Perfused Hearts of Various Species, Including Humans

Oxygen free radicals generated by xanthine oxidase have been implicated in cardiac damage. The activity of xanthine oxidase/reductase in adult rat heart is considerable. Its assay gives controversial results for other species, for example, rabbits and humans. Therefore, we perfused isolated hearts of various species, including explanted human hearts, to measure the conversion of exogenous hypox...

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Increased kidney xanthine oxidoreductase activity in salt-induced experimental hypertension.

Clinical and experimental studies have established an association between high sodium intake and arterial hypertension. The renal mechanisms resulting in impaired sodium excretion in hypertension-prone subjects are not clear. In hypertension-prone rats, high blood pressure results in increased renal mass and hemodynamic changes, both of which may alter renal oxygen distribution. Xanthine oxidor...

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Xanthine Oxidoreductase-Derived Reactive Species: Physiological and Pathological Effects.

Xanthine oxidoreductase (XOR) is the enzyme that catalyzes the oxidation of hypoxanthine to xanthine and xanthine to uric acid and is widely distributed among species. In addition to this housekeeping function, mammalian XOR is a physiological source of superoxide ion, hydrogen peroxide, and nitric oxide, which can function as second messengers in the activation of various pathways. This review...

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Age-dependent increase in xanthine oxidoreductase differs in various heart cell types.

Myocardial xanthine oxidase has been associated with reoxygenation injury induced by oxygen radicals. The damage due to myocardial ischemia and reperfusion increases with age; therefore, one would expect to find more xanthine oxidase in adult than in young hearts. Consequently, we studied the age-dependence of xanthine oxidoreductase activity in hearts, in addition to the localization of the en...

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ژورنال

عنوان ژورنال: Circulation Research

سال: 1990

ISSN: 0009-7330,1524-4571

DOI: 10.1161/01.res.67.3.770