Article (Scientific journals)
Microplastics alter development, behavior, and innate immunity responses following bacterial infection during zebrafish embryo-larval development.
Rabezanahary, Andry Ny Aina; Piette, Mathilde; Missawi, Omayma et al.
2022In Chemosphere, 311 (Pt 1), p. 136969
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Keywords :
Apoptosis; Bacterial infection; Immunity; Microplastics; Polystyrene microbeads; Zebrafish larvae
Abstract :
[en] Although the hazards of microplastics (MPs) have been explored, no complete data exists on the effect of MPs on the egg chorion. This study aims to evaluate the modification of immune responses, metabolism, and behavior of zebrafish larvae (Danio rerio) depending on the moment of exposure. Larvae were exposed to 5 μm polystyrene microbeads at a concentration of 0, 100, or 1000 μg/l, according to a specified times of exposure (0-4, 4-8, 0-8 days postfertilization (dpf)), followed by a bacterial challenge at 8 dpf. After every 4 and 8 dpf, swimming activity, gene expression related to oxidative stress and immune system responses were assessed. During embryonic development, larvae exposed to a concentration of 1000 μg/l MPs already showed a significantly reduced tail coiling frequency, yolk sac resorption and heartbeat. At 8 dpf, swimming activity was altered, even without ingestion and a few days after the end of MP exposure. Our results indicated a difference in immune system (nfkb, il1β) and apoptosis (casp3a, bcl2) related gene expression depending on the timing of MP exposure, which highlighted a contrasting sensitivity according to the exposure time in MP studies. This study brings new insight into how MPs might affect zebrafish larvae health and development even without ingestion.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Rabezanahary, Andry Ny Aina;  University of Namur, Research Unit in Environmental and Evolutionary Biology
Piette, Mathilde;  University of Namur, Research Unit in Environmental and Evolutionary Biology
Missawi, Omayma;  University of Namur, Research Unit in Environmental and Evolutionary Biology
Garigliany, Mutien-Marie  ;  Université de Liège - ULiège > Département de morphologie et pathologie (DMP) > Pathologie générale et autopsies
Kestemont, Patrick;  University of Namur, Research Unit in Environmental and Evolutionary Biology
Cornet, Valérie;  University of Namur, Research Unit in Environmental and Evolutionary Biology
Language :
English
Title :
Microplastics alter development, behavior, and innate immunity responses following bacterial infection during zebrafish embryo-larval development.
Publication date :
25 October 2022
Journal title :
Chemosphere
ISSN :
0045-6535
eISSN :
1879-1298
Publisher :
Elsevier, Oxford, Gb
Volume :
311
Issue :
Pt 1
Pages :
136969
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright © 2022 Elsevier Ltd. All rights reserved.
Available on ORBi :
since 08 November 2022

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