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Senseless is required for pupal retinal development in Drosophila
Benjamin J Frankfort1, Kathryn L Pepple, Mark Mamlouk
1Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA.
Genesis (New York, N.Y. : 2000)
|April 15, 2004
Summary
The gene senseless is crucial for developing Drosophila sensory organs, specifically recruiting support cells in the eye and forming bristles. Its role differs from other sensory organ development pathways.
Area of Science:
- Developmental Biology
- Genetics
- Neuroscience
Background:
- Drosophila proneural genes specify sensory organs by inducing common targets.
- Senseless (sens) encodes a zinc finger transcription factor and is a target of proneural genes.
Purpose of the Study:
- To investigate the function of Senseless during pupal retinal development in Drosophila.
- To elucidate the role of Senseless in the development of ommatidial support cells and interommatidial bristles.
Main Methods:
- Analysis of Senseless gene function during Drosophila pupal development.
- Examination of Senseless expression patterns in neural precursors.
- Genetic manipulation to assess necessity and sufficiency for bristle development.
Main Results:
- Senseless is required for the recruitment of cone and pigment cells, essential pupal support cells.
- Senseless expression begins in neural precursors post-larval-pupal transition.
- Senseless is both necessary and sufficient for interommatidial bristle development and is a primary target of achaete and scute.
- Interommatidial bristle development differs from other macrochaete, notably not requiring EGFR signaling or positive feedback regulation of proneural genes by Senseless.
Conclusions:
- Senseless plays a critical role in the specification of Drosophila sensory organs, particularly ommatidial support cells and interommatidial bristles.
- The developmental pathway for interommatidial bristles, regulated by Senseless, exhibits distinct features compared to other sensory structures.