拟除虫菊酯中间体对游离大鼠肝细胞毒性及其定量结构活性关系的研究

应用大鼠游离肝细胞培养技术研究１１种拟除虫菊酯类农药中间体的肝细胞毒性，并建立了同系物活性预测模型。结果表明：１１种受试物对大鼠肝细胞毒性有很大差异。（ＣＨ３）２ＣＨＯ－取代物毒性最大（１０８．９１μｇ／ｍｌ），苯乙睛（２０９９．０４μｇ／ｍｌ）和２－苯基－３－甲基丁睛（２２００．９０μｇ／ｍｌ）毒性最小。取代基对母体化合物电效应的影响是决定化合物毒性的主要因素。逸漏酶水平还与取代基亲脂性有关．４个ＱＳＡＲｓ方程Ｙ１＝－３．２８９＋１．１０７Ｆ－１．３０７Ｒ，Ｙ２＝０．７９６＋０．０３７１，Ｙ３＝２．５５３－０．０６１（π）２－０．２６５Ｆ－１．５７１Ｘｖ＋０．１５７（１Ｘｖ）２＋０．７４９２Ｘｖ，Ｙ４＝０．２２８＋０．６０１Ｆ＋０．３３８３Ｘｐｖ经检验表明具有一定的预测价值，可为该类有机污染物毒性研究提供辅助手段。

Cytotoxicity of Intermediates in Synthesizing Pyrethroid Insecticides to Rat Hepatocytes and Quantitative Structure-activity Analysis

Rat liver cytotoxicity of 11 phenylacetonitrile derivatives,intermediates in synthesizing pyrethroid insecticides, were assaied. The results show a great differential of toxicity among the chamicals. Cytotoxicity of (CH3)2CHO-is higher than that of others. Pheny acetonitrile and 2-phenyl-3-methyl butynitrile produce lower cytotoxicity. The electronic effects of substituents play an important role in toxicity of chemicals. Activities of enzymes leaking from cultured cells associate with hydrophobicity of substituents. According to the results, four predictive equatios were established. Statistical analysis indicate equations good predictability to phenylacetonitrile homologs.