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Related Experiment Videos

Identification of sonic hedgehog-responsive genes using cDNA microarray.

M Kato1, N Seki, S Sugano

  • 1Division of Signal Transduction, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-01, Japan.

Biochemical and Biophysical Research Communications
|November 22, 2001
PubMed
Summary

Sonic hedgehog (Shh) signaling is crucial in development and disease. This study identified two new Shh-responsive genes, Ceruloplasmin (Cp) and inter-alpha-trypsine inhibitor heavy chain H3 (ITIH3), using microarray analysis.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Sonic hedgehog (Shh) is a critical secreted signaling protein involved in development and disease.
  • Understanding downstream molecules of Shh signaling is essential for further research.

Purpose of the Study:

  • To identify novel Shh-responsive genes using a cDNA microarray approach.
  • To investigate the regulatory pathways of newly identified Shh-responsive genes.

Main Methods:

  • Utilized an in-house cDNA microarray to screen for Shh-responsive genes.
  • Employed a neuroepithelial cell line (MNS-70) for gene expression analysis.
  • Investigated gene regulation by Gli transcription factors and developmental expression patterns.

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Main Results:

  • Identified two novel Shh-responsive genes: Ceruloplasmin (Cp) and inter-alpha-trypsine inhibitor heavy chain H3 (ITIH3).
  • ITIH3 expression was found to be regulated by Gli transcription factors downstream of Shh.
  • Cp expression appeared to be regulated by Gli-independent pathways, with its mRNA detected in the developing mouse brain adjacent to Shh expression.

Conclusions:

  • Microarray technology is an effective tool for discovering developmentally regulated genes.
  • Cp and ITIH3 are newly identified Shh-responsive genes with distinct regulatory mechanisms.
  • This research expands the understanding of molecular pathways downstream of Sonic hedgehog signaling.