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Developmental programs and endocrine disruption in frog metamorphosis: the perspective from microarray analysis.

Saurabh S Kulkarni1, Daniel R Buchholz

  • 1Department of Biological Sciences, University of Cincinnati, Cincinnati, Ohio, USA.

Current Topics in Developmental Biology
|January 26, 2013
PubMed
Summary

Thyroid hormone (TH) regulates gene expression during frog metamorphosis. Microarray studies identified TH-regulated genes and potential biomarkers for endocrine disruption, offering insights into developmental processes.

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Genetic analyses show frog metamorphosis requires thyroid hormone signaling increased by glucocorticoid receptor signaling.

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Area of Science:

  • Developmental biology
  • Endocrinology
  • Genomics

Background:

  • Thyroid hormone (TH) is crucial for amphibian metamorphosis.
  • Understanding TH-regulated genes is key to deciphering developmental roles.
  • TH action provides a model for studying endocrine disruption.

Purpose of the Study:

  • Identify genes regulated by thyroid hormone (TH) during frog metamorphosis.
  • Discover biomarkers for TH endocrine disruption.
  • Analyze TH's role in tissue-specific development.

Main Methods:

  • Global gene expression analysis using microarrays.
  • Studies conducted across five frog species and seven organs.
  • Inclusion of endocrine disrupting chemicals to identify disruption biomarkers.

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Main Results:

  • Each organ exhibits unique TH-regulated gene sets linked to metamorphic outcomes.
  • Identified numerous transcription factors, aligning with TH molecular mechanisms.
  • Discovered candidate biomarkers for TH disruption and examined chemical mechanisms of action.

Conclusions:

  • Microarray studies generated extensive gene expression data on TH's role in development and endocrine disruption.
  • Findings reveal tissue-specific gene regulation by TH.
  • Further functional studies are needed to fully elucidate gene functions in development and endocrine disruption.