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Article Dans Une Revue Biology Letters Année : 2023

Correlations between oxidative DNA damage and formation of hepatic tumours in two flatfish species from contaminated environments

Ciara Baines
Richard Meitern
  • Fonction : Auteur
Randel Kreitsberg
  • Fonction : Auteur
Jérôme Fort
Jörn Peter Scharsack
  • Fonction : Auteur
Pedro Nogueira
  • Fonction : Auteur
Mathieu Giraudeau
Tuul Sepp

Résumé

Many species in aquatic environments face increased exposure to oncogenic pollution due to anthropogenic environmental change which can lead to higher cancer prevalence. The mechanistic relationship connecting environmental pollution and cancer is multi-factorial and poorly understood, and the specific mechanisms are so far still uncharacterized. One potential mediator between pollutant exposure and cancer is oxidative damage to DNA. We conducted a study in the field with two flatfish species, European flounder ( Platichthys flesus L.) and common dab ( Limanda limanda L. ) with overlapping distribution and similar ecological niche, to investigate if the link between oncogenic pollutants and cancer described in ecotoxicological literature could be mediated by oxidative DNA damage. This was not the case for flounders as neither polycyclic aromatic hydrocarbon (PAH) bile metabolites nor metallic trace element concentrations were related to oxidative DNA damage measurements. However, dabs with higher PAH concentrations did exhibit increased oxidative damage. High oxidative DNA damage also did not predict neoplasm occurrence, rather, healthy individuals tended to have higher oxidative damage measurements compared to fishes with pre-neoplastic tumours. Our analyses showed that flounders had lower concentrations of PAH bile metabolites, suggesting that compared to dab this species is less exposed or better at eliminating these contaminants.
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Dates et versions

hal-04111579 , version 1 (27-11-2023)

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Ciara Baines, Richard Meitern, Randel Kreitsberg, Jérôme Fort, Jörn Peter Scharsack, et al.. Correlations between oxidative DNA damage and formation of hepatic tumours in two flatfish species from contaminated environments. Biology Letters, 2023, 19 (5), ⟨10.1098/rsbl.2022.0583⟩. ⟨hal-04111579⟩

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