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Related Experiment Videos

Characterization and expression pattern of two zebrafish atf7 genes.

Chengtian Zhao1, Jingjing Qi, Anming Meng

  • 1State Key Laboratory of Biomembrane and Membrane Biotechnology, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing, China.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|May 21, 2005
PubMed
Summary

Researchers identified two zebrafish ATF7 genes, atf7a and atf7b. Zebrafish atf7a is crucial for notochord development, while atf7b shows ubiquitous expression, similar to mammalian ATF7.

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Area of Science:

  • Developmental Biology
  • Genetics
  • Molecular Biology

Background:

  • The activating transcription factor/cAMP-responsive element binding protein (ATF/CREB) family regulates vital cellular processes, including proliferation, apoptosis, and oncogenesis.
  • These transcription factors also play critical roles in vertebrate embryonic development.

Purpose of the Study:

  • To identify and characterize zebrafish orthologs of the human ATF7 gene.
  • To investigate the expression patterns and regulatory mechanisms of zebrafish atf7a and atf7b during embryonic development.

Main Methods:

  • Identification of zebrafish atf7 orthologs.
  • Whole-mount in situ hybridization to determine gene expression patterns in zebrafish embryos.
  • Analysis of gene regulatory networks involved in notochord development.

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Main Results:

  • Two zebrafish orthologs of human ATF7, designated atf7a and atf7b, were identified.
  • Zebrafish atf7a expression initiates in notochord precursors and continues in the developing notochord, regulated by key developmental genes (ntl, flh, spr2).
  • Zebrafish atf7b exhibits maternal expression and ubiquitous distribution throughout embryogenesis, mirroring mammalian Atf7 expression patterns.

Conclusions:

  • Zebrafish atf7a is specifically involved in notochord development, highlighting a conserved role for ATF7 family members in vertebrate development.
  • The distinct expression patterns of atf7a and atf7b suggest specialized functions within zebrafish embryogenesis.