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Related Experiment Videos

When body segmentation goes wrong.

O Pourquié1, K Kusumi

  • 1Laboratoire de génétique et de physiologie du développement (LGPD), Developmental Biology Institute of Marseille (IBDM), CNRS-INSERM-Université de la méditerranée-AP de Marseille, Marseille, France. pourquie@ibdm.univ-mrs.fr

Clinical Genetics
|February 16, 2002
PubMed
Summary
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Body segmentation, crucial for movement, relies on a molecular

Area of Science:

  • Developmental biology
  • Embryology
  • Genetics

Background:

  • Body segmentation is a fundamental characteristic in many animal species.
  • In humans, segmentation is evident in the vertebral column, muscles, and peripheral nervous system (PNS).
  • Vertebral segmentation originates from the embryonic somites' metameric pattern.

Purpose of the Study:

  • To explore the role of the segmentation clock in human embryonic development.
  • To investigate the molecular mechanisms underlying body segmentation.
  • To understand the implications of segmentation clock dysfunction in human congenital disorders.

Main Methods:

  • Review of recent evidence from fish, chick, and mouse embryos.
  • Analysis of human genetic data related to segmentation defects.

Related Experiment Videos

  • Focus on Notch signaling pathway and segmentation clock oscillations.

    • Main Results:

    • The segmentation clock, dependent on Notch signaling, controls embryonic body segmentation in model organisms.
    • Mutations in genes like Delta-like 3 (DLL3) disrupt segmentation clock function.
    • DLL3 mutations are linked to vertebral segmentation abnormalities in spondylocostal dysostosis syndrome.

    Conclusions:

    • The segmentation clock is essential for proper vertebral column formation in human embryos.
    • Dysfunction of the segmentation clock leads to congenital segmentation disorders.
    • Further research into the segmentation clock can elucidate mechanisms of human developmental abnormalities.