The H295R system for evaluation of endocrine-disrupting effects

Tannia GRACIA, Klara HILSCHEROVA, Paul D. JONES, John L. NEWSTED, Xiaowei ZHANG, Markus HECKER, Eric B. HIGLEY, J. T. SANDERSON, Richard M. K. YU, Shiu Sun Rudolf WU, John P. GIESY

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76 Citations (Scopus)

Abstract

The present studies were undertaken to evaluate the utility of the H295R system as an in vitro assay to assess the potential of chemicals to modulate steroidogenesis. The effects of four model chemicals on the expression of ten steroidogenic genes and on the production of three steroid hormones were examined. Exposures with individual model chemicals as well as binary mixtures were conducted. Although the responses reflect the known mode of action of the various compounds, the results show that designating a chemical as "specific inducer or inhibitor" is unwise. Not all changes in the mixture exposures could be predicted based on results from individual chemical exposures. Hormone production was not always directly related to gene expression. The H295R system integrates the effects of direct-acting hormone agonists and antagonists as well as chemicals affecting signal transduction pathways for steroid production and provides data on both gene expression and hormone secretion which makes this cell line a valuable tool to examine effects of chemicals on steroidogenesis. Copyright © 2006 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)293-305
JournalEcotoxicology and Environmental Safety
Volume65
Issue number3
DOIs
Publication statusPublished - Nov 2006

Citation

Gracia, T., Hilscherova, K., Jones, P. D., Newsted, J. L., Zhang, X., Hecker, M., . . . Giesy, J. P. (2006). The H295R system for evaluation of endocrine-disrupting effects. Ecotoxicology and Environmental Safety, 65(3), 293-305. doi: 10.1016/j.ecoenv.2006.06.012

Keywords

  • Bioassay
  • Steroidogenesis
  • Screening
  • Endocrine disruptors
  • Mixtures

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