Dernière mise à jour le : 20 janvier 2015

Transcriptome profile analysis reveals specific signatures of pollutants in Atlantic eels

DESCRIPTION

Identifying specific effects of contaminants in a multi-stress field context remain a challenge in ecotoxicology. In this context, "omics" technologies, by allowing the simultaneous measurement of numerous biological endpoints, could help unravel the in situ toxicity of contaminants. In this study, wild Atlantic eels were sampled in 8 sites presenting a broad contamination gradient in France and Canada. The global hepatic transcriptome of animals was determined by RNA-Seq. In parallel, the contamination level of fish to 8 metals and 25 organic pollutants was determined. Factor analysis for multiple testing was used to identify genes that are most likely to be related to a single factor. Among the variables analyzed, arsenic (As), cadmium (Cd), lindane (?-HCH) and the hepato-somatic index (HSI) were found to be the main factors affecting eel's transcriptome. Genes associated with As exposure were involved in the mechanisms that have been described during As vasculotoxicity in mammals. Genes correlated with Cd were involved in cell cycle and energy metabolism. For ?-HCH, genes were involved in lipolysis and cell growth. Genes associated with HSI were involved in protein, lipid and iron metabolisms. Our study proposes specific gene signatures of pollutants and their impacts in fish exposed to multi-stress conditions.

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keyboard_arrow_right Titre : Transcriptome profile analysis reveals specific signatures of pollutants in Atlantic eels
keyboard_arrow_right Type de documentation : Articles
keyboard_arrow_right Auteur(s) personne(s) : Bernathez Louis, Baudrimont, Magalie , Couture Patrice, Elie Pierre, Saracco, Jérôme , Durrieu, Gilles , Budzinski, Hélène , Labadie, Pierre , Peluhet Laurent, Caron Antoine, Normendeau Eric, Coudret, Raphaël , Pierron, Fabien , Baillon Lucie
keyboard_arrow_right Date de publication : 20 janvier 2015
keyboard_arrow_right Editeur(s) : Springer
keyboard_arrow_right Tags thématiques : poisson, charge en métaux lourds, polluant organique, stress, toxicité, pollution de l'eau, contamination chimique
keyboard_arrow_right Mots-clés libres : TOXICITY/WATER POLLUTION/CHEMICAL CONTAMINATION/FISH/STRESS/Transcriptome/Multi-pollutant/Wild fish populations/Atlantic eels
keyboard_arrow_right Langue : Anglais
keyboard_arrow_right N° d'édition (ISBN,DOI...) : 0.1007/s10646-014-1356-x
keyboard_arrow_right Collection : Revue Ecotoxicology

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