BAUDRIMONT, Magalie; ANDREÏ, Jennifer; MORNET, Stéphane; GONZALEZ, Patrice; MESMER-DUDONS, Nathalie; GOURVES, Pierre-Yves; JAFFAL, Ali; GEFFARD, Odile; GEFFARD, Alain; GEFFARD, Olivier; GARRIC, Jeanne; FEURTET-MAZEL, Agnès

doi:10.1007/s11356-017-8400-3

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BAUDRIMONT, Magalie
Environnements et Paléoenvironnements OCéaniques [EPOC]

ANDREÏ, Jennifer
Environnements et Paléoenvironnements OCéaniques [EPOC]

MORNET, Stéphane
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Environmental Science and Pollution Research. 2018-04, vol. 25, n° 12, p. 11181-11191

Springer Verlag

Resumen en inglés

This work addressed the trophic transfer and effects of functionalized gold nanoparticles (AuNPs) from periphytic biofilms to the crustacean Gammarus fossarum. Biofilms were exposed for 48 h to 10 nm positively charged functionalized AuNPs at two concentrations, 4.6 and 46 mg/L, and crustaceans G. fossarum grazed on these for 7 days, with daily biofilm renewal. Gold bioaccumulation in biofilm and crustacean were measured to estimate the trophic transfer ratio of these AuNP, and, for the first time, a transcriptomic approach and transmission electron microscopy observations in the crustacean were made. These two approaches showed cellular damage caused by oxidative stress and, in particular, an impact of these AuNPs on mitochondrial respiration. Modulation of digestive enzyme activity was also observed, suggesting modifications of digestive functions. The damage due to these nanoparticles could then have vital consequences for the organisms during chronic exposure.< Leer menos

Palabras clave en inglés

Periphytic biofilm

Trophic transfer

Mitochondrial disruption

Gene transcription

Gold nanoparticles

Gammarus fossarum

Digestive enzyme activity

DOI

http://dx.doi.org/10.1007/s11356-017-8400-3

Proyecto ANR

Approches à différentes échelles pour caractériser les interactions cellulaires, le transfert trophique et les impacts toxiques de nanoparticules métalliques chez les organismes aquatiques
Initiative d'excellence de l'Université de Bordeaux

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