Environmental Analysis Health and Toxicology

The Korean Society of Environmental Health and Toxicology (환경독성보건학회)
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Evaluation of the Genetic Toxicity of Synthetic Chemicals (Ⅶ) -A Synthetic Selective Herbicide, Pendimethalin-

합성화학물질들의 유전독성평가(Ⅶ) -합성 제초제인 Pendimethalin-

  • Ryu, Jae-Chun (Toxicology Laboratory, Korea institute of Science and Technology) ;
  • Kim, Kyung-Ran (Toxicology Laboratory, Korea institute of Science and Technology)
  • Published : 2003.06.01
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Abstract

The genotoxicity of pendimethalin [N-(l-ethylpropyl)-2, 6-dinitro-3, 4-xylidine, C$\_$13/H$\_$19/N$_3$O$_4$, M.W.=281.3, CAS No. 40487-42-1], one of selective herbicide, was evaluated in bacterial gene mutation system, chromosome aberration in mammalian cell system and in vivo micronucleus assay with rodent. In bacterial gene mutation assay, pendimethalin revealed dose-dependent mutagenic potential in 313 ∼ 5,000 ${\mu}$g/plate of Salmonella typhimurium TA 98 and TA 1537 both in the absence and presence of S-9 metabolic activation system, and TA 100 only in the absence of S-9 mixture. In the TA 1535, slight increase of revertant was also observed in the presence of S-9 metabolic activation system. No mutagenic potential was observed in the TA 1535 without metabolic activation system and TA l00 in the presence of S-9 mixture. In mammalian cell system using Chinese hamster lung (CHL) fibroblast, no clastogenicity of pendimethalin was observed both in the absence and presence of S-9 metabolic activation system in the concentration range of 2.32∼9.28 ${\mu}$g/ml. And also, in vivo bone marrow micronucleus assay, pendimethalin revealed no clastogenic potential in the dose range of 203∼810 mg/kg body weight after oral administration in mice. Consequently, in vitro chromosome aberration with mammalian cells and in vivo bone marrow micronucleus assay revealed no clastogenic potential of pendimethalin. However, pendimethalin revealed mutagenic potential in bacterial gene mutation assay.

Pendimethalin [N-(1-ethyl-propyl)-2, 6-dinitro-3, 4-xylidine, $C_{13}$H$_{19}$N$_3$O$_4$, M.W. = 281.3, CAS No. 40481-42-1]는 제초제의 일종으로, 본 연구에서는 박테리아 복귀 돌연변이 시험과 포유동물 세포를 이용한 염색체 이상 시험 및 마우스를 이용한 in vivo 소핵 시험을 수행하여 pendimethalin의 유전독성을 평가하였다. 박테리아 복귀 돌연변이 시험에서 pendimethalin은 Salmonella thphimurium TA98, TA1537 균주의 경우, 대사 활성계 존재와 부재시,TA100의 경우는 대사 활성계 부재시에만 313∼5,000 $\mu\textrm{g}$/p1a1e의 범위에서 농도의존적인 돌연변이율의 증가를 보여주었고, TA1535의 경우에는 대사 활성계 존재시 약간의 돌연변이가 증가되는 것을 관찰할 수 있었다. 그러나 대사 활성계 부재시 TA1535와 대사 활성계 존재시 TA100균주의 경우에는 돌연변이 유발능을 관찰할 수 없었다. 한편 포유동물 세포인 Chinese hamster lung(CHL) fibroblast를 이용한 염색체 이상 시험에서 pendimethalin은 대사 활성계 존재 및 부재시 2.32∼9.28 $\mu\textrm{g}$/ml 농도에서 clastogenicity를 보이지 않았다. 또한 203∼810 mg/kg의 pendimethalin을 구강 투여한 마우스의 골수세포를 이용한 in vivo소핵 시험의 결과에서도 통계적으로 유의한 소핵 유발능을 관찰할 수 없었다.다.

Keywords

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