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논문 기본 정보

자료유형
학술저널
저자정보
윤기욱 (성균관대학교 약학대학) 이상호 (성균관대학교 약학대학) 이선미 (성균관대학교 약학대학)
저널정보
대한약학회 약학회지 약학회지 제44권 제3호
발행연도
2000.1
수록면
237 - 244 (8page)

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초록· 키워드

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Liver isolated from 18 hours fasted rats was subjected to $N_2$hypoxia (for 45 min) followed by reoxygenation (for 30 min). The perfusion medium used was Krebs-Henseleit bicarbonate buffer (pH 7.4, $37^{\circ}C$). Vitamin C (0.5 mM) and trolox C (0.5 mM), soluble vitamin E analog, were added to perfusate. Lactate dehydrogenase (LDH), total glutathione, oxidized glutathione, lipid peroxide and drug-metabolizing enzymes were measured. After hypoxia LDH significantly increased but this increase was attenuated by vitamin C and combination of vitamin C and E. Total glutathione and oxidized glutathione in perfusate markedly increased during hypoxia and this increase was inhibited by vitamins C, E and its combination. Similarly; oxidized glutathione and lipid peroxide in liver tissue increased after hypoxia and reoxygenation and this increase was inhibited by vitamin I and combination of vitamin C and E. Hepatic drug metabolizing function (phase I, II) were suppressed during hypoxia but improved during reoxygenation. While vitamins C and E only increased glucuronidation, the combination of vitamin C and E increased the oxidation, glucuronidation and sulfation. Our findings suggest that vitamins C and E synergistically ameliorates hepatocellular damage as indicated by abnormalities in drug metabolizing function during hypoxia/reoxygenation and that this protection is in major part, caused by decreased oxidative stress.

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