Histopathological effects and EROD induction in common carp exposed to dietary heavy oil.

Ecotoxicol Environ Saf

Education and Research Center for Marine Resources and Environment, Faculty of Fisheries, Kagoshima University, Shimoarata 4-50-20, Kagoshima City 890-0056, Japan.

Published: March 2011

AI Article Synopsis

  • Common carp exposed to 1% and 5% dietary heavy oil for 2 weeks showed increased accumulation of polyaromatic hydrocarbons (PAHs) and higher EROD activity in the liver compared to the control group.
  • Significant liver damage included changes like nuclear hypertrophy and degeneration, while the kidneys exhibited severe damage including necrosis and hemorrhaging.
  • The severity of liver and kidney tissue damage increased with both the concentration of heavy oil and the length of exposure.

Article Abstract

Common carp, Cyprinus carpio, was exposed to 1% and 5% dietary heavy oil for 2 weeks. Higher polyaromatic hydrocarbons (PAHs) accumulation induced higher hepatic EROD activity in exposure groups compared with the control group. Significant histological alternations were observed in the liver such as nuclear and cellular hypertrophy, accumulation of eosinophilic granules in cytoplasm, nuclear degeneration and fibrillar inclusion in cytoplasm. Severe damage of the kidney was indicated by nuclear and cellular degeneration, and ultimately necrosis in the tubular epithelium cells. In addition, dilated glomerulus with hemorrhage was found in the renal capsule. The mean assessment value (MAV) and degree of tissue changes (DTC), as semi-quantitative analyses, were significantly increased with concentration and duration of exposure. Likewise, frequencies of pathological lesions in both liver and kidney were also increased with concentration and duration of exposure.

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http://dx.doi.org/10.1016/j.ecoenv.2011.01.003DOI Listing

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