Correlative changes in metabolism and DNA damage in turbot (Scophthalmus maximus) exposed to benzo[a]pyrene


Telli-Karakoc F., Ruddock P., Bird D., Hewer A., Van Schanke A., Phillips D., ...More

MARINE ENVIRONMENTAL RESEARCH, vol.54, pp.511-515, 2002 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 54
  • Publication Date: 2002
  • Doi Number: 10.1016/s0141-1136(02)00192-7
  • Journal Name: MARINE ENVIRONMENTAL RESEARCH
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.511-515
  • Keywords: 7-ethoxyresorufin O-deethylase activity, benzo[a]pyrene, bile, metabolites, DNA adduct, postlabelling, DAB LIMANDA-LIMANDA, CYTOCHROME-P450 1A, RESPONSES, ADDUCTS

Abstract

Juvenile turbot (Scophthalmus maximus) were injected intraperitonteally with either corn oil or 5 mg/kg benzo[a]pyrene (BaP) dissolved in corn oil and sampled I and 3 days after injection. After I day, no elevation of 7-ethoxyresorufin O-deethylase (EROD) activity was observed, however bile metabolites (BaP-7,8 dihydrodiol representing 70% of the total metabolites) and a single hepatic DNA adduct spot (0.47 adducts/10(8) nucleotides) identified by P-32-postlabelling were formed. No BaP metabolites or DNA adducts were observed in either control or carrier control fish. Fish sampled after 3 days reported 5-fold higher (P < 0.05) levels of EROD activity, a shift in the bile metabolite profile towards BaP phenol formation (1OH and 3OH BaP comprising up to 60% of total metabolites detected) and the formation of two adduct spots (0.86 and 0.71 adducts/10(8) nucleotides). These results show that BaP can be metabolised and form hydrophobic DNA adducts in turbot without EROD elevation. Following EROD elevation, a shift in the profile of both BaP metabolites and BaP metabolite DNA interactions occurs indicative of other oxidative processes. (C) 2002 Published by Elsevier Science Ltd.