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© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Nanoplastics (NPs) are anthropogenic contaminants that raise concern, as they cross biological barriers. Metals’ adsorption on NPs’ surface also carries ecotoxicological risks to aquatic organisms. This study focuses on the impacts of three distinct NPs on the Caribbean oyster Isognomon alatus through dietary exposure. As such, marine microalgae Tisochrysis lutea were exposed to environmentally weathered mixed NPs from Guadeloupe (NPG), crushed pristine polystyrene nanoparticles (PSC), and carboxylated polystyrene nanoparticles of latex (PSL). Oysters were fed with NP-T. lutea at 10 and 100 µg L−1, concentrations considered environmentally relevant, combined or not with 1 mg L−1 pentoxide arsenic (As) in water. We investigated key gene expression in I. alatus’ gills and visceral mass. NP treatments revealed significant induction of cat and sod1 in gills and gapdh and sod1 in visceral mass. As treatment significantly induced sod1 expression in gills, but once combined with any of the NPs at both concentrations, basal mRNA levels were observed. Similarly, PSL treatment at 100 µg L−1 that significantly induced cat expression in gills or sod1 in visceral mass showed repressed mRNA levels when combined with As (reduction of 2222% and 34%, respectively, compared to the control). This study suggested a protective effect of the interaction between NPs and As, possibly by decreasing both contaminants’ surface reactivity.

Details

Title
Molecular Impacts of Dietary Exposure to Nanoplastics Combined or Not with Arsenic in the Caribbean Mangrove Oysters (Isognomon alatus)
Author
Lebordais, Marc 1 ; Venel, Zélie 2 ; Gigault, Julien 3   VIAFID ORCID Logo  ; Langlois, Valerie S 4 ; Baudrimont, Magalie 2 

 Université de Bordeaux, CNRS, UMR EPOC 5805, Place du Dr Peyneau, 33120 Arcachon, France; [email protected] (M.L.); [email protected] (Z.V.); Centre Eau Terre Environnement, Institut National de la Recherche Scientifique (INRS), 490 rue de la Couronne, Québec City, QC G1K 9A9, Canada; [email protected] 
 Université de Bordeaux, CNRS, UMR EPOC 5805, Place du Dr Peyneau, 33120 Arcachon, France; [email protected] (M.L.); [email protected] (Z.V.) 
 Université Laval, UMI Takuvik 3376, 1045 Avenue de la Médecine, Québec City, QC G1V 0A6, Canada; [email protected] 
 Centre Eau Terre Environnement, Institut National de la Recherche Scientifique (INRS), 490 rue de la Couronne, Québec City, QC G1K 9A9, Canada; [email protected] 
First page
1151
Publication year
2021
Publication date
2021
Publisher
MDPI AG
e-ISSN
20794991
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2532186790
Copyright
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.