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Related Experiment Videos

Vertebrate segmentation: the clock is linked to Notch signalling

Y J Jiang1, L Smithers, J Lewis

  • 1Vertebrate Development Laboratory Imperial Cancer Research Fund 44 Lincoln's Inn Fields London WC2A 3PX UK.

Current Biology : CB
|December 9, 1998
PubMed
Summary

The segmentation clock, crucial for vertebrate development, relies on cyclic gene expression. Recent studies link this clock to the Delta-Notch signaling pathway through Lunatic fringe expression in embryos.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Vertebrate embryonic development involves periodic somite formation.
  • A molecular 'segmentation clock' is hypothesized to regulate this process.
  • The precise molecular mechanisms of the segmentation clock remain under investigation.

Purpose of the Study:

  • To investigate the molecular basis of the segmentation clock.
  • To explore the role of Delta-Notch signaling in vertebrate segmentation.
  • To connect cyclic gene expression patterns with developmental timing.

Main Methods:

  • Analysis of gene expression patterns in chick and mouse embryos.
  • Focus on the expression dynamics of Lunatic fringe.
  • Correlation of Lunatic fringe expression with somite formation stages.

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Main Results:

  • Cyclic expression of Lunatic fringe was observed during somitogenesis.
  • This cyclic expression pattern suggests a role in the segmentation clock.
  • The findings implicate Delta-Notch signaling in the timing of somite formation.

Conclusions:

  • Lunatic fringe expression is dynamically regulated during vertebrate segmentation.
  • Delta-Notch signaling is a key component of the molecular segmentation clock.
  • These findings provide insights into the genetic control of embryonic patterning.