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