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Running after the clock.

Catarina Freitas1, Sofia Rodrigues, Leonor Saude

  • 1Instituto Gulbenkian de Ciência, Oeiras, Portugal.

The International Journal of Developmental Biology
|May 21, 2005
PubMed
Summary
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See all related articles

A molecular clock controls vertebrate development, providing positional information for cell differentiation. This fundamental mechanism is conserved across species, operating in various embryonic tissues.

Area of Science:

  • Developmental biology
  • Molecular embryology
  • Chronobiology

Background:

  • Research at the "Institut d'Embryologie Cellulaire et Moleculaire" has significantly advanced vertebrate development understanding.
  • A key discovery revealed a molecular clock regulating chick somite formation.

Purpose of the Study:

  • To review the cascade of studies following the discovery of the molecular clock in vertebrate development.
  • To explore the function and prevalence of this molecular clock mechanism.

Main Methods:

  • Loss and gain of function experiments to investigate clock machinery.
  • Gene promoter analyses to understand clock gene regulation.
  • Comparative studies across multiple vertebrate models.

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Main Results:

  • The molecular clock is confirmed in chick, mouse, zebrafish, frog, and medaka.
  • The clock provides multidimensional positional information to cells.
  • Evidence suggests the clock operates in diverse embryonic tissues beyond somites.

Conclusions:

  • The molecular clock is a fundamental mechanism in vertebrate embryonic development.
  • This clock likely plays a crucial role in providing positional cues for tissue patterning.
  • Further research is needed to fully elucidate the clock's mechanisms and broader functions.