Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Responses in Hepatic Xenobiotic Metabolizing and Antioxidant Enzymes in Javelin Goby Acanthogobius hasta Collected at Shihwa Lake

시화호에서 채집한 풀망둑 Acanthogobius hasta의 간장 약물대사효소계 및 항산화계의 반응

  • 이지선 (강릉대학교 해양생명공학부.동해안해양생물자원연구센터) ;
  • 정지현 (동의대학교 생명과학부) ;
  • 한창희 (한국해양연구원 남해연구소) ;
  • 심원준 (동의대학교 생명과학부) ;
  • 전중균 (강릉대학교 해양생명공학부.동해안해양생물자원연구센터)
  • Published : 2008.05.31
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Abstract

The aim of this study was to assess the responses of mixed function oxygenase (MFO) and antioxidative systems of feral Javelin goby, Acanthogobius hasta, caught in two sites of different pollution level in Shihwa lake, which has been a highly polluted lake by organic pollutants from nearby industrial complexes and sites. Enzymes analyzed in phase I of MFO system are cytochrome P450 (CYP), NADPH-cytochrome P450 reductase (P450R), NADH-cytochrome b5 reductase (b5R), and ethoxyresorufin deethylase (EROD). Phase II enzyme of glutathione S-transferase (GST) in MFO system was also investigated. Moreover, oxidative-enzyme system including catalase (CAT), glutathione reductase (GR) and total-glutathione peroxidase (GPX) activities and glutathione concentration in both of oxidized (GSSG) and reduced form (GSH) were determined. P450R, b5R, and GST activities of fish are relatively high in the polluted area, whereas hepatic EROD activity levels of fish in polluted area were lower than those of unpolluted area. CYP concentrations are not different between areas. These results indicated that feral Acanthogobius hasta were adaptive to highly polluted environment and exposed to oxidative stress in Shihwa lake.

공장 폐수로 인한 오염이 심한 경기 시화호에서 오염정도가 다른 두 지역으로부터 풀망둑을 채집하여 이들의 해독효소계 또는 항산화효소계의 반응을 비교하였다. 해독효소계에서 I상효소로는 CYP, P450R, b5R, EROD를, II상효소로는 GST를 조사하였다. 그리고 항산화효소계로는 CAT, GR, CPx의 활성 그리고 GSH및 CSSG농도를 조사하였다. 그 결과, 오염정도가 심한 지역에서 잡은 어류가 간장 중 P450R, b5R, GST의 활성이 높았으나 EROD활성은 오히려 낮았고 CYP농도는 차이가 없었다. 그리고 이지역에서 잡은 어류는 CAT와 GR의 활성, 비효소적인 항산화계인 CSH와 GSSC농도도 더 높았으나 GTx활성은 오히려 낮았다. 이들 결과는 시화호의 오염된 곳에서 서식하는 풀망둑 Acanthogobius hasta은 상당히 해독효소계가 항진되어 있으며 산화 스트레스도 크게 받고 있음을 보여준다.

Keywords

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