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초록·키워드
This study were carried out to investigate cytotoxicity oj paraquat and bentazon that is scattering to farm products were essential for human diet and compensatory effects of 3-methylcholanthrene (3-MC) in vitro and in vivo. In vitro, The 5.0×10⁴cell/ml of NIH 3T3 fibroblast in each well of 24 multidish were cultured. After 24 hours, the cells were treated with solution of paraquat and bentazon (1, 25, 50, 100 J.1M respectively). After the NIH 3T3 Jib rob last of all groups were cultured in same condition for 48 hours, Sulfohordamin B Protein (SRB) assay were performed to evaluate the cytotoxicity of cell organelles. Paraquat and bentazon SRB50 were 1860.73 J.μM, 1913.38 J.μM respectively. In vivo, Sprague Dawley male rats divided into paraquat and bentazon only administered group and simultaneous application group of paraquat and bentazon and 3-MC. At 30 min. and I, 3, 6, 12,24,48 and 96 hrs. interval after each treatment, the animals were sacrificed by decapitation and kidney were immediately removed, immersed in fixatives, and processed with routine method for light microscopic study. Paraffin sections were stained with H-E, PAM, and PAS. Under the light microscope, atrophic change of renal corpuscles were frequently observed from 3 hrs after paraquat and bentazon treatment. The increase of the mesangium was apparent 12 hrs later after paraquat and bentazon treatment. Necrotic changes of the epithelium and loss of brush border of proximal tubules were most severe at 48 hrs after paraquat and bentazon treatment, respectively. In contrast there were no evidences of the toxic effects on renal tissues at 48hrs in paraquat and bentazon plus 3-MC treated groups.
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UCI(KEPA) : I410-ECN-0101-2009-513-013746135