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Colin Y, Arcanjo C, Da Costa C, Vivant AL, Trémolet G, Giusti-Petrucciani N, Duflot A, Forget-Leray J, Berthe T, Boulangé-Lecomte C. Decoupled responses of the copepod Eurytemora affinis transcriptome and its microbiota to dissolved copper exposure. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 259:106546. [PMID: 37120957 DOI: 10.1016/j.aquatox.2023.106546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
Chemical contamination is a common threat to biota thriving in estuarine and coastal ecosystems. Of particular importance is that trace metals tend to accumulate and exert deleterious effects on small invertebrates such as zooplankton, which are essential trophic links between phytoplankton and higher-level consumers in aquatic food webs. Beyond the direct effects of the contamination, we hypothesized that metal exposure could also affect the zooplankton microbiota, which in turn might further impair host fitness. To assess this assumption, copepods (Eurytemora affinis) were sampled in the oligo-mesohaline zone of the Seine estuary and exposed to dissolved copper (25 µg.L-1) over a 72-hour time period. The copepod response to copper treatment was assessed by determining transcriptomic changes in E. affinis and the alteration of its microbiota. Unexpectedly, very few genes were differentially expressed in the copper-treated copepods compared to the controls for both male and female samples, while a clear dichotomy between sex was highlighted with 80% of the genes showing sex-biased expression. In contrast, copper increased the taxonomic diversity of the microbiota and resulted in substantial compositional changes at both the phyla and genus levels. Phylogenetic reconstruction of the microbiota further suggested that copper mitigated the phylogenetic relatedness of taxa at the basal tree structure of the phylogeny, whereas it strengthened it at the terminal branches. Increased terminal phylogenetic clustering in the copper-treated copepods coincided with higher proportions of bacterial genera previously identified as copper resistant (e.g., Pseudomonas, Acinetobacter, Alkanindiges, Colwellia) and a higher relative abundance of the copAox gene encoding a periplasmic inducible multi-copper oxidase. The enrichment in micro-organisms likely to perform copper sequestration and/or enzymatic transformation processes, underlines the need to consider the microbial component during evaluation of the vulnerability of zooplankton to metallic stress.
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Affiliation(s)
- Yannick Colin
- Univ Rouen Normandie, UNICAEN, CNRS, M2C UMR 6143, F-76000 Rouen, France; Sorbonne Université, CNRS, EPHE, UMR METIS, F-75005, Paris, France.
| | - Caroline Arcanjo
- Université Le Havre Normandie, Normandie Univ, FR CNRS 3730 SCALE, UMR-I 02 SEBIO, Le Havre, F-76600 Le Havre, France
| | - Claire Da Costa
- Univ Rouen Normandie, UNICAEN, CNRS, M2C UMR 6143, F-76000 Rouen, France
| | - Anne-Laure Vivant
- Univ Rouen Normandie, UNICAEN, CNRS, M2C UMR 6143, F-76000 Rouen, France
| | - Gauthier Trémolet
- Université Le Havre Normandie, Normandie Univ, FR CNRS 3730 SCALE, UMR-I 02 SEBIO, Le Havre, F-76600 Le Havre, France
| | - Nathalie Giusti-Petrucciani
- Université Le Havre Normandie, Normandie Univ, FR CNRS 3730 SCALE, UMR-I 02 SEBIO, Le Havre, F-76600 Le Havre, France
| | - Aurélie Duflot
- Université Le Havre Normandie, Normandie Univ, FR CNRS 3730 SCALE, UMR-I 02 SEBIO, Le Havre, F-76600 Le Havre, France
| | - Joëlle Forget-Leray
- Université Le Havre Normandie, Normandie Univ, FR CNRS 3730 SCALE, UMR-I 02 SEBIO, Le Havre, F-76600 Le Havre, France
| | - Thierry Berthe
- Univ Rouen Normandie, UNICAEN, CNRS, M2C UMR 6143, F-76000 Rouen, France; Sorbonne Université, CNRS, EPHE, UMR METIS, F-75005, Paris, France
| | - Céline Boulangé-Lecomte
- Université Le Havre Normandie, Normandie Univ, FR CNRS 3730 SCALE, UMR-I 02 SEBIO, Le Havre, F-76600 Le Havre, France
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Liu L, Fu J, Tang Q, Wang H, Lin C, Wei L. Combined transcriptomics and metabolomics analysis reveals lipid metabolic disruption in swamp eel (Monopterus albus) under chronic waterborne copper exposure. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 259:106520. [PMID: 37061419 DOI: 10.1016/j.aquatox.2023.106520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 03/21/2023] [Accepted: 04/02/2023] [Indexed: 05/15/2023]
Abstract
Excessive copper can induce many adverse effects although it's an essential trace element in organisms. The effects of copper on the lipid metabolism have aroused increasing attention. This study investigated the liver lipid metabolism in swamp eel (Monopterus albus, M. albus) chronically exposed to 0, 10, 50, and 100 μg/L Cu2+ for 56 days. The results showed that copper increased the contents of triglyceride (TG), total cholesterol (T-CHO), non-esterified fatty acids (NEFA), and lipid droplets. Transcriptomic analysis found 1901 differentially expressed genes (DEGs) and 140 differential alternative splicing (DAS) genes in the 50 μg/L Cu2+ group, and 1787 DEGs and 184 DAS genes in the 100 μg/L Cu2+ group, respectively, which were enriched in peroxisome proliferator-activated receptor (PPAR), adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK), and other signaling pathways. The expression levels of key genes related to PPAR and AMPK signaling pathways were significantly down-regulated after chronic exposure to Cu2+. Meanwhile, metabolomics analysis showed that 52 and 110 differentially expressed metabolites (DEMs) were identified, which were mainly enriched in glycerophospholipids metabolism and steroid synthesis. Moreover, combined analysis of transcriptome and metabolome showed that glycerophospholipid metabolism co-enriched 19 down-regulated DEGs and 4 down-regulated DEMs. Taken together, our results suggested that chronic waterborne copper exposure promoted lipid synthesis, disrupted the metabolic homeostasis of glycerophospholipid, and led to excessive hepatic lipid deposition in M. albus. The combined omics approach enhanced our understanding of copper pollution to lipid metabolism.
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Affiliation(s)
- Lin Liu
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, China
| | - Jianping Fu
- College of life sciences, Jiangxi Normal University, Nanchang, Jiangxi Province 330045, China
| | - Qiongying Tang
- Zhejiang Province Key Laboratory of Aquatic Resources Conservation and Development, College of Life Sciences, Huzhou University, Huzhou, Zhejiang Province 313000, China
| | - Hui Wang
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, China
| | - Changgao Lin
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, China
| | - Lili Wei
- College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi Province 330045, China.
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