Fisheries and Aquatic Sciences

한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)
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In vivo Effects of Di-n-butyl Phthalate and Di-2-ethylhexyl Phthalate on the Nonspecific Defense Mechanism of the Bagrid Catfish, Pseudobagrus fulvidraco

  • Masroor Fatima (Department of Biology, University of Namur) ;
  • Jee Jung-Hoon (Trade Promotion Division, International Cooperation Bureau, Ministry of Maritime Affairs & Fisheries) ;
  • Keum Yoo-Hwa (Department of Aquatic Life Medicine, Pukyong National University) ;
  • Kang Ju-Chan (Department of Aquatic Life Medicine, Pukyong National University)
  • 발행 : 2006.03.01
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초록

The aim of this study was to investigate in vivo toxicity and effects of two phthalate esters (PEs), di-n-butylphthalate (DBP) and di-2-ethylhexyl phthalate (DEHP), on the immune system of the bagrid catfish, Pseudobagrus fulvidraco. Groups of experimental fish were subjected to daily intraperitoneal injections of 300 or 1000 mg $kg^{-1}$ of DBP or DEHP for 3 days, and the cellularity and functional activity of phagocytes were measured in the spleen and pronephros (head kidney). The number of spleen leukocyte cells increased significantly (p<0.05) in response to low and high doses of DEHP and DBP, respectively; however, the cellularity of the pronephros was more susceptible to higher dose of DEHP than DBP. Nonspecific immunity, as determined by the phagocytic index (PI) and phagocytic capacity (PC), was significantly depressed by DEHP at 1000 $1000mg\;kg^{-1}\;day^{-1}$ in the pronephros at 3 days after injection. Furthermore, significantly (p<0.05) increased levels of serum glutamic oxaloacetate transaminase (GOT) and glutamic pyruvate transaminase (GPT) indicated marked hepatic dysfunction in immunosuppressed fish. Treated fish showed a significant reduction in total serum protein but no significant alteration in lysozyme activity. These results demonstrate the sensitivity of the fish immune response for predicting PE-induced immunotoxicity.

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참고문헌

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