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Risk assessment on cytotoxicity for benzimidazole fungicides  

Lee, Je-Bong (Pesticide Safety Division, NIAST)
Sung, Pil-Nam (Livestock division, National Jeju Agricultural Experimental Station)
Jeong, Mi-Hye (Pesticide Safety Division, NIAST)
Shin, Jin-Sup (Pesticide Safety Division, NIAST)
Kang, Kyu-Young (Dept. of Enviro-Biotechnology, Gyeong Sang National University)
Publication Information
The Korean Journal of Pesticide Science / v.7, no.3, 2003 , pp. 198-206 More about this Journal
Abstract
To assess potential risk of the benzimidazole fungicides, their cytotoxicities were evaluated. Activities of LDH(Lactic dehydrogenase) in the culture fluid of CHL(chinese hamster lung) fiberoblast cell treated with 4.0, 16.0 or $32.0{\mu}g/mL$ of carbendazim for 24 hours were elevated 2.16, 2.94 and 2.64 folds compared to the control, respectively. DNA synthesis was inhibited by 45% at $2.0{\mu}g/mL$ of carbendazim. Benzimidazole fungicides showed high toxicity to cell and mitochondria of CHL cell by Giemsa and MTT (3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide) assay. $IC_{50}$ by the Giemsa assay of thiophanate-methyl, benomyl, carbendazim and captafol were over 125, 1.2, 30.0 and $0.3{\mu}g/mL$, respectively. $IC_{50}$ by the MTT assay of thiophanate-methyl, benomyl, carbendazim and captafol were over 125, 18.7, 20.4 and $2.6{\mu}g/mL$, respectively. Inhibitory concentration of cell median proliferation by SRB (sulforhodamin B) assay for thiophanate-methyl, carbendazim, benomyl, and captafol were 17.4, 5.3, 1.5 and $0.5{\mu}g/mL$, respectively. Accordingly, benzimidazole fungicides inhibited DNA synthesis, mitochondrial function, cell proliferation and induced cell necrosis.
Keywords
Benzimidazole Fungicides; Cytotoxicity; Chinese Hamster Lung Fiberoblast Cell;
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