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Related Experiment Videos

Requirements for integrins during Drosophila development.

S Zusman1, R S Patel-King, C Ffrench-Constant

  • 1Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge 02139.

Development (Cambridge, England)
|March 1, 1990
PubMed
Summary

Drosophila PS integrins, encoded by the lethal(1)myospheroid gene, are crucial for proper development of ventral structures, wings, and eyes. Their absence causes defects in tissue adhesion and cell arrangement during development.

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Genetics

Background:

  • The common beta subunit of PS antigens in Drosophila is homologous to vertebrate integrins.
  • This subunit is encoded by the lethal(1)myospheroid gene, crucial for cellular adhesion and development.

Purpose of the Study:

  • To investigate the developmental roles of PS integrins, specifically the beta subunit encoded by lethal(1)myospheroid.
  • To identify specific tissues and processes dependent on these integrins during Drosophila development.

Main Methods:

  • Generation of mosaic flies using adult gynandromorphs and radiation-induced somatic crossing over.
  • Analysis of developmental defects in wings and eyes in flies with mutant lethal(1)myospheroid alleles.

Main Results:

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  • PS integrins are widely required during development, particularly in ventrally derived structures.
  • Mutations lead to wing defects (blisters, vein abnormalities) and aberrant photoreceptor cell development.
  • PS integrins are essential for epithelial cell apposition in wings and photoreceptor cell arrangement.

Conclusions:

  • The lethal(1)myospheroid gene product (PS beta integrin) plays critical roles in Drosophila development, including wing and eye formation.
  • While essential for specific adhesive and morphogenetic processes, other developmental functions can proceed without this integrin subunit.