Transfer and Transcriptomic Profiling in Liver and Brain of European Eels (Anguilla anguilla) After Diet‐borne Exposure to Gold Nanoparticles. (15th October 2020)

• Record Type: Journal Article
• Authors: Perrier, Fanny; Bertucci, Anthony; Pierron, Fabien; Feurtet‐Mazel, Agnès; Simon, Olivier; Klopp, Christophe; Candaudap, Frédéric; Pokrovski, Oleg; Etcheverria, Bruno; Mornet, Stéphane; Baudrimont, Magalie
• Is Part Of: Environmental toxicology and chemistry. Volume 39:Number 12(2020)
• Page Start: 2450
• Page End: 2461
• Publication Date: 2020-10-15
• Subjects: Gold nanoparticles -- Anguilla anguilla -- RNA sequencing -- Diet‐borne exposure -- Immunity; Pollution -- Environmental aspects -- Periodicals; Environmental chemistry -- Periodicals; 615.902
• DOI: 10.1002/etc.4858
• Languages: English
• ISSNs: 0730-7268

Abstract

Abstract: A nanometric revolution is underway, promising technical innovations in a wide range of applications and leading to a potential boost in environmental discharges. The propensity of nanoparticles (NPs) to be transferred throughout trophic chains and to generate toxicity was mainly assessed in primary consumers, whereas a lack of knowledge for higher trophic levels persists. The present study focused on a predatory fish, the European eel ( Anguilla anguilla ) exposed to gold NPs (AuNPs; 10 nm, polyethylene glycol–coated) for 21 d at 3 concentration levels in food: 0 (NP0), 1 (NP1), and 10 (NP10) mg Au kg −1 . Transfer was assessed by Au quantification in eel tissues, and transcriptomic responses in the liver and brain were revealed by a high‐throughput RNA‐sequencing approach. Eels fed at NP10 presented an erratic feeding behavior, whereas Au quantification only indicated transfer to intestine and kidney of NP1‐exposed eels. Sequencing of RNA was performed in NP0 and NP1 eels. A total of 258 genes and 156 genes were significantly differentially transcribed in response to AuNP trophic exposure in the liver and brain, respectively. Enrichment analysis highlighted modifications in the immune system–related processes in the liver. In addition, results pointed out a shared response of both organs regarding 13 genes, most of them being involved in immune functions. This finding may shed light on the mode of action and toxicity of AuNPs in fish. Environ Toxicol Chem 2020;39:2450–2461. © 2020 SETAC Graphical Abstract: European eels were exposed to food‐borne gold nanoparticles (AuNPs). The whole transcriptome response was assessed by RNA sequencing in the brain and liver.