Effects of the coastal sediment extracts containing persistent organic pollutants (POPs) on embryonic flounder

Title
Effects of the coastal sediment extracts containing persistent organic pollutants (POPs) on embryonic flounder
Author(s)
최유미; 김문구; 이영미; 정지현
KIOST Author(s)
Choi, Youmi(최유미)Kim, Moonkoo(김문구)Jung, Jee Hyun(정지현)
Publication Year
2019-10-18
Abstract
Sediment is a long term storage for pollutants and a secondary source of contamination for aquatic species. The toxic effects of complex mixtures of pollutants accumulated in sediments are poorly documented. To highlight the different factors influencing sediment toxicity, we identified and analyzed the developmental toxicity level on three contrasted sediments including different contaminant sources. Sediment toxicity was evaluated using the olive flounder embryo-larval assay with exposure to sediment extracts (SE). Chemical analyses revealed difference in contamination profile among three sediments. Mainly impacted by pesticide elements in sediment from Jinhae bay(SEJ), but polycyclic aromatic hydrocarbons in sediment from Young-il bay(SEY). Occurrence percentage of pericardial edema was higher in embryonic flounder exposed to SC from Young-il Bay. Consistent with the malformation toxicity, the expression level of genes related to heart formation including the Nkx 2.5 and robo 1 was greater in embryonic flounder exposed to SEY. In analyses of differential gene expression (DEG) profiles (fold change of genes with a cutoff P < 0.05), by high-throughput sequencing (RNA-seq), embryos exposed to SEJ showed changes related to nervous system development. Genes related to immune system were down-regulated in embryos exposed to SEY. Embryos exposed to SEJ and SEY showed significantly up-regulated gens including the cytochrome P4501A1. These results show the necessity of combining chemical analysis of sediment with embryonic toxicity assessment to accurately evaluate the environmental risks associated with sediment contamination.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/22244
Bibliographic Citation
한국해양생명과학회, pp.106, 2019
Publisher
한국해양생명화학회
Type
Conference
Language
English
Publisher
한국해양생명화학회
Related Researcher
Research Interests

Oil pollution,Antifouling paint,Dissolved methane,유류오염,방오도료,용존메탄

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