Exposures of zebrafish through diet to three environmentally relevant mixtures of PAHs produce behavioral disruptions in unexposed F1 and F2 descendant.
Caroline Vignet, Lucette Joassard, Laura Lyphout, Tiphaine Guionnet, Manon Goubeau, Karyn Le Menach, François Brion, Olivier Kah, Bon-Chu Chung, Hélène Budzinski, Marie-Laure Bégout, Xavier Cousin
Author Information
Caroline Vignet: Ecotoxicology Laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France.
Lucette Joassard: Fisheries laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France.
Laura Lyphout: Fisheries laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France.
Tiphaine Guionnet: Fisheries laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France.
Manon Goubeau: Ecotoxicology Laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France.
Karyn Le Menach: University of Bordeaux 1, EPOC, UMR CNRS 5805, 33405, Talence, France.
François Brion: Unité d'Ecotoxicologie in vitro et in vivo, Direction des Risques Chroniques, INERIS, 60550, Verneuil-en-Halatte, France.
Olivier Kah: INSERM U1085, Research Institute in Health, Environment and Occupation, Team NEED, Case 1302Université de Rennes 1 Campus de Beaulieu, 35 042, Rennes cedex, France.
Bon-Chu Chung: Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan.
Hélène Budzinski: University of Bordeaux 1, EPOC, UMR CNRS 5805, 33405, Talence, France.
Marie-Laure Bégout: Fisheries laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France.
Xavier Cousin: Ecotoxicology Laboratory, Ifremer, Place Gaby Coll, BP7, 17137, L'Houmeau, France. xcousin@ifremer.fr.
The release of polycyclic aromatic hydrocarbons (PAHs) into the environment has increased very substantially over the last decades. PAHs are hydrophobic molecules which can accumulate in high concentrations in sediments acting then as major secondary sources. Fish contamination can occur through contact or residence nearby sediments or though dietary exposure. In this study, we analyzed certain physiological traits in unexposed fish (F1) issued from parents (F0) exposed through diet to three PAH mixtures at similar and environmentally relevant concentrations but differing in their compositions. For each mixture, no morphological differences were observed between concentrations. An increase in locomotor activity was observed in larvae issued from fish exposed to the highest concentration of a pyrolytic (PY) mixture. On the contrary, a decrease in locomotor activity was observed in larvae issued from heavy oil mixture (HO). In the case of the third mixture, light oil (LO), a reduction of the diurnal activity was observed during the setup of larval activity. Behavioral disruptions persisted in F1-PY juveniles and in their offspring (F2). Endocrine disruption was analyzed using cyp19a1b:GFP transgenic line and revealed disruptions in PY and LO offspring. Since no PAH metabolites were dosed in larvae, these findings suggest possible underlying mechanisms such as altered parental signaling molecule and/or hormone transferred in the gametes, eventually leading to early imprinting. Taken together, these results indicate that physiological disruptions are observed in offspring of fish exposed to PAH mixtures through diet.
