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Related Experiment Videos

Goosecoid and the organizer.

E M De Roberts1, M Blum, C Niehrs

  • 1Molecular Biology Institute, University of California, Los Angeles 90024-1737.

Development (Cambridge, England). Supplement
|January 1, 1992
PubMed
Summary

The goosecoid gene is crucial for Spemann's organizer function in embryonic development. Its expression and targeted delivery can induce secondary body axes, highlighting its role in vertebrate gastrulation.

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Area of Science:

  • Developmental Biology
  • Molecular Embryology
  • Genetics

Background:

  • Spemann's organizer phenomenon is a key event in embryonic development.
  • The molecular mechanisms underlying this phenomenon remain incompletely understood.
  • Homeobox genes, like goosecoid, are critical regulators of embryonic patterning.

Purpose of the Study:

  • To investigate the role of the goosecoid gene in Spemann's organizer phenomenon.
  • To determine if goosecoid acts as a molecular determinant of dorsal axis formation.
  • To compare goosecoid expression patterns in Xenopus and mouse gastrulae.

Main Methods:

  • Xenopus embryo microinjection of goosecoid mRNA.
  • Analysis of goosecoid gene expression patterns in early embryos.
  • Comparative analysis of goosecoid and Brachyury expression in vertebrate gastrulae.

Main Results:

  • Xenopus goosecoid is expressed dorsally prior to Spemann's organizer formation.
  • Microinjection of goosecoid mRNA into ventral Xenopus embryos induced twinned body axes.
  • Goosecoid expression is activated by dorsal inducers and unaffected by ventral inducers.
  • Goosecoid is expressed in the anterior primitive streak of mouse embryos.

Conclusions:

  • The goosecoid homeodomain protein is an integral component of the Spemann's organizer.
  • Goosecoid plays a critical role in establishing the dorsal-ventral axis during vertebrate gastrulation.
  • Goosecoid serves as an early marker for comparative studies of vertebrate gastrulation.

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