RELATION BETWEEN CARDIOTOXIC EFFECT OF ADRIAMYCIN AND SUPEROXIDE ANION RADICAL
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概要
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The investigation was undertaken to study a possible mechanism for adriamycin cardiotoxicity. The activities of superoxide dismutase and catalase in the heart of mice were increased significantly by the intraperitoneal administration of 15mg/kg of adriamycin. In contrast, these enzymes in the liver and kidney were unaffected by this dose of adriamycin. In vitro studies revealed that adriamycin inhibited the NADH-cytochrome coxidoreductase activity of mitochondria in the guinea pigs heart. Moreover adriamycin stimulated the formation of superoxide anion radical in mitochondria isolated from guinea pigs. Particularly, the formation of superoxide anion radical in the heart mitochondria was 5 times higher than that in the liver mitochondria particle. On the other hand, the contents of superoxide dismutase in the heart were significantly lower than that in the liver. These results suggest that the cardiotoxic effect of adriamycin is caused by the following mechanism : adriamycin directly stimulates the formation of superoxide anion radical, particularly in the heart mitochondria. In spite of the induction of defence enzymes such as superoxide dismutase and catalase, their abilities seem to be swamped by enhanced active oxygen radicals.
- 社団法人日本薬学会の論文
著者
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HIRANO Kazuyuki
Gifu Pharmaceutical University
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Adachi Tetsuo
Gifu Pharmaceutical University
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ITO YOSHIMASA
Gifu Pharmaceutical University
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NAGAE TADAO
Gifu College of Pharmacy
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SUGIURA MAMORU
Gifu College of Pharmacy
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