Influence of the polyphenolic tannic acid on the toxicity of the insecticide deltamethrin to fish. A comparative study examining both biochemical and cytopathological parameters

Zs Varanka, K. Aranka Deér, I. Rojik, I. Varanka, Kinga László, T. Bartók, J. Nemcsók, Magdolna Ábrahám

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Humics and pesticides are present in aquatic environment and the toxicological consequences of their chemical interaction is well studied. However, data concerning the mechanism of the biochemical action of humic-pesticide combinations are scarce, especially in vertebrates. Thus we have chosen to study the in vivo effects of the plant polyphenolic tannic acid and the pyrethroid insecticide deltamethrin [Decis] alone or in combination on hepatic xenobiotic-metabolizing enzyme activities and the associated redox-parameters in carp, as the complex assessment of these systems are regarded to serve as a relevant biomarker of environmental pollution. Stress effects and tissue damage were followed by determination of the plasma glucose level, the activities of plasma transaminases, and by electron microscopy. Tannic acid alone exerted weak prooxidant effect due to its marked antioxidant enzyme inhibitory activity. Deltamethrin, applied in a very low dose, induced oxyradical production in fish via activation of cytochrome P450 isozymes. This effect was promoted by the antioxidant enzyme inhibitory action of tannic acid, when the two chemicals were combined; however, the ultrastructural damage of the hepatocytes was reduced by the common cytoprotective capacity of the phenolic. Numerous humics are known to alter the toxicity of pesticides and their influence depends on their type and concentration. Therefore, our work taken together with other comparative studies may contribute to the assessment of the impact of humics in nature, especially in case of environmental pollution.

Original languageEnglish
Pages (from-to)351-365
Number of pages15
JournalActa biologica Hungarica
Volume53
Issue number3
DOIs
Publication statusPublished - Sep 12 2002

Keywords

  • Antioxidant enzymes
  • Carp
  • Cytochrome P450-dependent monooxigenases
  • Humics
  • Pyrethroid

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Neurology

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