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Reprod Toxicol. 2018 Apr;77:80-93. doi: 10.1016/j.reprotox.2018.02.006. Epub 2018 Feb 16.

Transcriptomic and phenotypic profiling in developing zebrafish exposed to thyroid hormone receptor agonists.

Author information

1
Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States.
2
Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States; Current: National Center for Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Washington, DC, United States.
3
Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States.
4
Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States. Electronic address: Robert.Tanguay@oregonstate.edu.

Abstract

There continues to be a need to develop in vivo high-throughput screening (HTS) and computational methods to screen chemicals for interaction with the estrogen, androgen, and thyroid pathways and as complements to in vitro HTS assays. This study explored the utility of an embryonic zebrafish HTS approach to identify and classify endocrine bioactivity using phenotypically-anchored transcriptome profiling. Transcriptome analysis was conducted on zebrafish embryos exposed to 25 estrogen-, androgen-, or thyroid-active chemicals at concentrations that elicited adverse malformations or mortality at 120 h post-fertilization in 80% of animals exposed. Analysis of the top 1000 significant differentially expressed transcripts and developmental toxicity profiles across all treatments identified a unique transcriptional and phenotypic signature for thyroid hormone receptor agonists. This unique signature has the potential to be used as a tiered in vivo HTS and may aid in identifying chemicals that interact with the thyroid hormone receptor.

KEYWORDS:

Endocrine disruptors; High-throughput; Phenotypic anchoring; ToxCast; Transcriptomics; Zebrafish

PMID:
29458080
PMCID:
PMC5878140
[Available on 2019-04-01]
DOI:
10.1016/j.reprotox.2018.02.006
[Indexed for MEDLINE]

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