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Positive and negative DNA sequence elements are required to establish the pattern of Pax3 expression

T A Natoli1, M K Ellsworth, C Wu

  • 1Roswell Park Cancer Institute, Department of Molecular and Cellular Biology, Buffalo, NY 14263, USA.

Development (Cambridge, England)
|February 1, 1997
PubMed
Summary

Researchers identified DNA elements controlling Pax3 gene expression during cell differentiation. These elements regulate Pax3

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Area of Science:

  • Developmental Biology
  • Molecular Genetics
  • Gene Regulation

Background:

  • Pax3 is a crucial gene in embryonic development, involved in neural tube and somite formation.
  • Understanding the regulatory mechanisms of Pax3 expression is key to deciphering developmental processes.

Purpose of the Study:

  • To identify and characterize the DNA sequence elements responsible for regulating Pax3 gene induction.
  • To investigate the role of these elements in directing Pax3 expression patterns during embryogenesis.

Main Methods:

  • Localization of transcription start sites and DNA sequence elements in P19 embryonal carcinoma cells.
  • Analysis of regulatory element function using transgenic mouse models.
  • Assessment of gene expression patterns in various embryonic tissues.

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Main Results:

  • A promoter and upstream elements within 1.6 kbp are sufficient for Pax3 induction and dorsal restriction in the neural tube and somites.
  • Additional regulatory elements within 14 kbp 5' to the transcription start site control anterior expression and repression in specific mesodermal tissues.

Conclusions:

  • Specific DNA sequences upstream of the Pax3 gene dictate its precise spatial and temporal expression during embryonic development.
  • These regulatory elements are critical for correct patterning of the neural tube, somites, and migrating myoblasts.