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Growth and patterning from the engrailed interface

A Hidalgo1

  • 1Department of Genetics, University of Cambridge, United Kingdom. a.hidalgo@gen.cam.ac.uk

The International Journal of Developmental Biology
|July 8, 1998
PubMed
Summary

The engrailed gene drives limb growth along the proximo-distal axis in Drosophila. Its role in compartment boundaries suggests conserved functions in vertebrate limb development, involving cell communication and decapentaplegic signaling.

Area of Science:

  • Developmental Biology
  • Genetics
  • Comparative Anatomy

Background:

  • The Drosophila wing is segmented into anterior and posterior compartments, with engrailed gene expression defining the posterior.
  • The Antero/Posterior compartment boundary in Drosophila wings shares molecular similarities with the Apical Ectodermal Ridge in vertebrate limbs.

Purpose of the Study:

  • To investigate the conserved role of the engrailed gene in limb growth.
  • To explore the molecular mechanisms underlying the Antero/Posterior compartment boundary formation in Drosophila wings.
  • To understand the regulatory interactions governing morphogenetic processes during development.

Main Methods:

  • Comparative analysis of gene expression patterns.
  • Examination of molecular signaling pathways involved in compartment boundary formation.

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  • Review of existing evidence on gene interactions in developmental patterning.

    • Main Results:

    • Evidence suggests engrailed's primary conserved function is to promote limb growth along the proximo-distal axis.
    • The Antero/Posterior compartment boundary is influenced by cell communication between compartments, not just differential cell affinities.
    • Decapentaplegic signaling plays a role in establishing the compartment boundary.
    • Patterning involves genes such as engrailed, invected, and hedgehog.

    Conclusions:

    • The engrailed gene is crucial for conserved limb growth mechanisms.
    • The compartment boundary is a result of decapentaplegic-mediated growth control and cell communication.
    • Regulatory interactions between engrailed and hedgehog pathways are significant for morphogenetic regulation.