Assessing the endocrine disrupting potentials and genotoxicity in environmental samples from Taiwanese rivers

Pei Hsin Chou, Chien Hsun Chen, Kuang Yu Chen, Fung Chi Ko, Tsung Ya Tsai, Yi Po Yeh

Research output: Contribution to journalArticle

Abstract

Background: Surface waters receive a variety of organic pollutants via wastewater discharge, and sediment represents a sink for hydrophobic contaminants. In this study, we used in vitro yeast-based reporter gene assays and a Bacillus subtilis Rec-assay to examine the occurrence of endocrine disrupting activities and genotoxic potentials in samples collected from three Taiwanese rivers. Levels of 51 polycyclic aromatic hydrocarbons (PAHs) in muscles of fish captured from same rivers were also analyzed to assess in vivo pollution of PAHs. Results: Antagonist activities for androgen receptor and retinoid X receptor (RXR) were detected in river water extracts at environmentally relevant concentrations., and sediment extracts exhibited RXR agonist, RXR antagonist, and genotoxic potentials concurrently. ς16 PAHs in fish muscles ranged from 44.9-242.4 ng g- 1 dry weight, representing 38 to 59% of the total 51 PAHs concentrations, and methylated PAHs of low molecular weight PAHs were often detected as well. Conclusion: Taiwanese river sediment samples concomitantly exhibited RXR disrupting potentials and genotoxic activities, whereas RXR agonist and antagonist activities were simultaneously detected in several dry-season sediment extracts. PAH levels in fish muscles were categorized as minimally polluted by aromatic compounds, nonetheless, the presence of methylated PAHs in muscles samples may be of concern owing to the higher toxic potentials than their parent compounds.

Original languageEnglish
Article number24
JournalGenes and Environment
Volume41
Issue number1
DOIs
Publication statusPublished - 2019 Dec 30

All Science Journal Classification (ASJC) codes

  • Social Psychology
  • Genetics
  • Environmental Science (miscellaneous)

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