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자료유형
학술저널
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한국독성학회 Toxicological Research Journal of Toxicology and Public Health Vol.18 No.3
발행연도
2002.9
수록면
293 - 300 (8page)

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Chemical carcinogen-induced alterations of aldehyde metabolic enzymes were examined in clone 9 cell. Diethylnitrosamine (DENA), N-nitrosoethylurea (NEU) and N-nitrosomorpholine (NNM) were used as model chrcinogens. Changes in enzyme activities by repetitive treatment of DENA, NEU of NNM were analyzed in terms of specific activities and activity stainings of the enzymes on the gel. Upon treatment of DENA, lipid peroxide level increased upto 10 fold, indication strong oxidative stress state of the cell. Notable enhancement of ADH and ALDH activity occurred after DENA treatment, while glutathione-S-transferase activity was slightly increased. Furthermore, about 2.5 fold higher superoxide dismutase (SOD) activity was detected during deactivation of catalase (CAT) activity by repetitive treatment of DENA. However, in NEU-treated cell, about 2.3 fold higher ALDH activity was found while ADH activity was slightly increasecd. Notable increase of CAT and SOD could also be found. In contrast, maximum 3.5 fold higher CAT activity occurred during SOD deactivation in NNM-treated cell. These results suggest that there might be different enzymatic responses in relation to cell protection against DENA, NEU of NNM,

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