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Ecotoxicol Environ Saf. 2018 Dec 15;165:70-77. doi: 10.1016/j.ecoenv.2018.08.100. Epub 2018 Sep 4.

Transcriptomic responses of Nile tilapia (Oreochromis niloticus) liver to environmental concentration of di(2-ethylhexyl)phthalate.

Author information

1
Scientific Observing and Experimental Station of South China Sea Fishery Resources & Environments, Ministry of Agriculture, Guangzhou 510300, PR China; Guangdong Provincial Key Lab. of Fishery Ecology and Environment, Guangzhou 510300, PR China; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, PR China. Electronic address: zhanglinbao1984@163.com.
2
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, PR China.
3
Scientific Observing and Experimental Station of South China Sea Fishery Resources & Environments, Ministry of Agriculture, Guangzhou 510300, PR China; Guangdong Provincial Key Lab. of Fishery Ecology and Environment, Guangzhou 510300, PR China; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, PR China.
4
Scientific Observing and Experimental Station of South China Sea Fishery Resources & Environments, Ministry of Agriculture, Guangzhou 510300, PR China; Guangdong Provincial Key Lab. of Fishery Ecology and Environment, Guangzhou 510300, PR China; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, PR China. Electronic address: nhscwg2017@sina.com.

Abstract

Di-(2-ethylhexyl) phthalate (DEHP) is currently the most frequently detected phthalic acid esters (PAEs) compounds and can induce diverse toxicities on aquatic organisms. To understand the molecular responses of fish to DEHP, we performed transcriptomic profiles in liver of tilapia (Oreochromis niloticus) which were exposed to environmental concentration of DEHP. A total of 30.10 Mb and 30.16 Mb clean reads were retrieved from the control and DEHP treated libraries, respectively. De-novo assembly of all the clean reads obtained 58,585 unigenes. After comparing the two libraries, 2814 and 1790 genes were identified as significantly increased and depressed, respectively. Gene ontology (GO) classification system and Kyoto Encyclopedia of Genes and Genomes (KEGG) database analysis demonstrated that DEHP significantly disturbed the expression level of genes associated with immunity, endocrine and reproductive system, lipid metabolism and so on. Quantitative real-time PCR was performed to validate the results of RNA-sequencing (RNA-seq) analysis. The resulting data provide new insights for exploring the molecular basis of tilapia response to DEHP exposure.

KEYWORDS:

DEHP; Liver; Nile tilapia; Toxicity; Transcriptome

PMID:
30193166
DOI:
10.1016/j.ecoenv.2018.08.100
[Indexed for MEDLINE]

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