Realistic environmental exposure to microplastics does not induce biological effects in the Pacific oyster Crassostrea gigas

• Published in: Marine Pollution Bulletin
• Main Authors: Revel, Messika, Châtel, Amélie, Perrein-Ettajani, Hanane, Bruneau, Mélanie, Akcha, Farida, Sussarellu, Rossana, Rouxel, Julien, Costil, Katherine, Decottignies, Priscilla, Cognie, Bruno, Lagarde, Fabienne, Mouneyrac, Catherine
• Other Authors: Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN), BIOlogie des populations, Stress, Santé, Environnement (BIOSSE), Université Catholique de l'Ouest (UCO), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Institut des Molécules et Matériaux du Mans (IMMM), Le Mans Université (UM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: [SDV]Life Sciences [q-bio]; [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology; [SDV.EE]Life Sciences [q-bio]/Ecology; environment; Pacific; Crassostrea gigas; Pacific oyster
• Online Access: https://normandie-univ.hal.science/hal-02482996; https://normandie-univ.hal.science/hal-02482996/document; https://normandie-univ.hal.science/hal-02482996/file/S0025326X19307751.pdf; https://doi.org/10.1016/j.marpolbul.2019.110627

International audience The aim of the present study was to evaluate the presence and potential toxic effects of plastic fragments (< 400 μm) of polyethylene and polypropylene on the Pacific oyster Crassostrea gigas. Oysters were exposed to environmentally relevant concentrations (0, 0.008, 10, 100 μg of particles/L) during 10 days, followed by a depuration period of 10 days in clean seawater. Effects of microplastics were evaluated on the clearance rate of organisms, tissue alteration, antioxidant defense, immune alteration and DNA damage. Detection and quanti-fication of microplastics in oyster's tissues (digestive gland, gills and other tissues) and biodeposits using infrared microscopy were also conducted. Microplastics were detected in oyster's biodeposits following exposure to all tested concentrations: 0.003, 0.006 and 0.05 particles/mg of biodeposits in oysters exposed to 0.008, 10 and 100 μg of particles/L, respectively. No significant modulation of biological markers was measured in organisms exposed to microplastics in environmentally relevant conditions.