Differential modulation of expression of nuclear receptor mediated genes by tris(2-butoxyethyl) phosphate (TBOEP) on early life stages of zebrafish (Danio rerio)

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

10 Scopus Citations
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Author(s)

  • Zhiyuan Ma
  • Yijun Yu
  • Song Tang
  • Hongling Liu
  • Guanyong Su
  • And 4 others
  • Yuwei Xie
  • John P. Giesy
  • Markus Hecker
  • Hongxia Yu

Detail(s)

Original languageEnglish
Pages (from-to)196-203
Journal / PublicationAquatic Toxicology
Volume169
Early online date30 Oct 2015
Publication statusPublished - Dec 2015

Abstract

As one substitute for phased-out brominated flame retardants (BFRs), tris(2-butoxyethyl) phosphate (TBOEP) is frequently detected in aquatic organisms. However, knowledge about endocrine disrupting mechanisms associated with nuclear receptors caused by TBOEP remained restricted to results from in vitro studies with mammalian cells. In the study, results of which are presented here, embryos/larvae of zebrafish (Danio rerio) were exposed to 0.02, 0.1 or 0.5 μM TBOEP to investigate expression of genes under control of several nuclear hormone receptors (estrogen receptors (ERs), androgen receptor (AR), thyroid hormone receptor alpha (TRα), mineralocorticoid receptor (MR), glucocorticoid receptor (GR), aryl hydrocarbon (AhR), peroxisome proliferator-activated receptor alpha (PPARα), and pregnane. × receptor (P× R)) pathways at 120 hpf. Exposure to 0.5 μM TBOEP significantly (p<0.05, one-way analysis of variance) up-regulated expression of estrogen receptors (ERs, er1, er2a, and er2b) genes and ER-associated genes (vtg4, vtg5, pgr, ncor, and ncoa3), indicating TBOEP modulates the ER pathway. In contrast, expression of most genes (mr, 11βhsd, ube2i,and adrb2b) associated with the mineralocorticoid receptor (MR) pathway were significantly down-regulated. Furthermore, in vitro mammalian cell-based (MDA-kb2 and H4IIE-luc) receptor transactivation assays, were also conducted to investigate possible agonistic or antagonistic effects on AR- and AhR-mediated pathways. In mammalian cells, none of these pathways were affected by TBOEP at the concentrations studied. Receptor-mediated responses (in vivo) and mammalian cell lines receptor binding assay (in vitro) combined with published information suggest that TBOEP can modulate receptor-mediated, endocrine process (in vivo/. in vitro), particularly ER and MR.

Research Area(s)

  • Endocrine disruption, Estrogen receptor, Flame retardant, Mineralocorticoid receptor, Nuclear receptor, Organophosphate, Receptor-mediated network, Toxicity

Citation Format(s)

Differential modulation of expression of nuclear receptor mediated genes by tris(2-butoxyethyl) phosphate (TBOEP) on early life stages of zebrafish (Danio rerio). / Ma, Zhiyuan; Yu, Yijun; Tang, Song; Liu, Hongling; Su, Guanyong; Xie, Yuwei; Giesy, John P.; Hecker, Markus; Yu, Hongxia.

In: Aquatic Toxicology, Vol. 169, 12.2015, p. 196-203.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review