The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Effects on Biomarkers and Endocrine in Muddy Loach (Misgurnus anguillicaudatus) under 21 day Exposure to Methomyl

21일간 methomyl에 노출한 미꾸리의 생물지표 및 내분비계 영향

  • Han, Sun-Young (Environmental Toxicology Research Center, Korea Institute of Toxicology) ;
  • Kim, Ja-Hyun (Environmental Toxicology Research Center, Korea Institute of Toxicology) ;
  • Gwon, Ga-Young (Environmental Toxicology Research Center, Korea Institute of Toxicology) ;
  • Yeom, Dong-Hyuk (Environmental Toxicology Research Center, Korea Institute of Toxicology)
  • 한선영 (안전성평가연구소 환경독성연구센터) ;
  • 김자현 (안전성평가연구소 환경독성연구센터) ;
  • 권가영 (안전성평가연구소 환경독성연구센터) ;
  • 염동혁 (안전성평가연구소 환경독성연구센터)
  • Received : 2011.12.28
  • Accepted : 2012.02.20
  • Published : 2012.03.31
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Abstract

To evaluate the effect of endocrine disruption chemicals (EDCs) to aquatic organisms, muddy loach (Misgurnus anguillicaudatus) was exposed to low concentration methomyl for 21 days in order to identify the effect of biomarkers and endocrine. Vitellogenin (VTG) in blood plasma, which used widely as validated biomarker for endocrine disruption, was significantly greater in male fish exposed to 0.4 mg/L and 2 mg/L methomyl, and in female fish exposed to 0.08 mg/L, 0.4 mg/L, and 2 mg/L methomyl for 21 days (p<0.05). This results suggest that methomyl have probability of endocrine disruption to organism on aquatic system. While inhibition of Acetylcholinesterase (AChE) activity and increase of DNA damage in comet assay were verified by fish exposed to methomyl, change of ethoxyresorufin-O-deethylase (EROD) activity was not occurred, comparing the control group (p<0.05). Indicators at the level of organism such as condition factor (CF), hepato-somatic index (HSI), and gonado-somatic index (GSI) were not influenced by exposure of methomyl. In conclusion, these results showed the possibility of methomyl in regard to not only endocrine disruption but also impacts on biochemical biomarkers to aquatic organisms.

내분비계교란물질이 수서생물에 미치는 영향을 평가하기 위하여 미꾸리를 저농도의 methomyl에 21일 동안 노출시켜 생물지표 및 내분비계 영향을 평가하였다. 내분비계교란물질에 대한 노출을 입증하기 위해 널리 이용되는 생물지표인 vitellogenin(VTG)은 21일 동안 0.4 mg/L와 2 mg/L methomyl에 노출된 수컷과 0.08 mg/L, 0.4 mg/L, 2 mg/L의 methomyl에 노출된 암컷에서 대조군에 비해 유의하게 증가하여(p<0.05), methomyl의 수생태계 생물에 대한 내분비계교란 가능성을 확인하였다. Acetylcholinesterase(AChE) 시험 및 comet assay에서는 methomyl에 노출시킨 미꾸리로부터 AChE 활성 저해와 DNA 손상을 확인한 반면, 7-ethoxyresorufin-O-deethylase(EROD) 활성에 대한 대조군과 처리군의 차이는 나타나지 않았다(p<0.05). 개체수준의 생물지표인 condition factor(CF), 간중량지수(hepato-somatic index, HSI), 생식소중량지수(gonado-somatic index, GSI)는 methomyl 노출에 의해 영향을 받지 않는 것으로 나타났다. 현재의 연구결과를 종합해 볼 때, methomyl의 수서생물에 대한 내분비계교란 가능성 및 생화학적 생물지표에 대한 영향을 확인할 수 있었다.

Keywords

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