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Glide2, a second glial promoting factor in Drosophila melanogaster
1Institut de Génétique et Biologie Moléculaire et Cellulaire, IGBMC/CNRS/ULP/INSERM - BP 163, 67404 Illkirch, c.u. de Strasbourg, France.
The EMBO Journal
|September 5, 2001
Summary
Two genes, glide/gcm and glide2, are essential for fly nervous system development. Together, these transcription factors control the formation of all lateral glial cells, ensuring proper gliogenesis.
Area of Science:
- Developmental biology
- Neuroscience
- Genetics
Background:
- The glial cell deficient/glial cell missing (glide/gcm) gene is a known transcription factor crucial for gliogenesis.
- Loss of glide/gcm function results in the absence of lateral glial cells in the embryonic fly nervous system.
Purpose of the Study:
- To identify and characterize additional genes involved in fly gliogenesis.
- To understand the regulatory network controlling lateral glial cell development.
Main Methods:
- Homology analysis to identify related genes.
- Expression pattern analysis of identified genes.
- Genetic analysis to determine necessity and sufficiency for glial differentiation.
Main Results:
- A second gene, glide2, homologous to glide/gcm, was identified.
- glide2 encodes a transcription factor with weaker and delayed expression compared to glide/gcm.
- glide/gcm and glide2 form a gene complex with auto- and cross-regulatory capabilities.
- Loss of both glide/gcm and glide2 function eliminates all lateral glial cells.
Conclusions:
- glide/gcm and glide2 are collectively necessary and sufficient for all fly lateral glial cell promotion.
- These two genes constitute a regulatory complex essential for gliogenesis in the fly embryonic nervous system.