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Updated: May 10, 2026

Preparation of Developing and Adult Drosophila Brains and Retinae for Live Imaging

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Published on: March 16, 2010

Drosophila Jun mediates Ras-dependent photoreceptor determination

D Bohmann¹, M C Ellis, L M Staszewski

¹European Molecular Biology Laboratory, Heidelberg, Federal Republic of Germany.

|September 23, 1994

Summary

The Drosophila transcription factor Jun is crucial for neuronal development in the eye. Jun regulates photoreceptor cell fate determination and differentiation, acting downstream of key signaling pathways.

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The Tomato/GFP-FLP/FRT Method for Live Imaging of Mosaic Adult Drosophila Photoreceptor Cells

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Area of Science:

Developmental biology
Neuroscience
Genetics

Background:

The determination of neuronal cell fate is a fundamental process in developmental biology.
Signaling pathways like sevenless/Ras play critical roles in cell fate decisions during development.

Purpose of the Study:

To investigate the role of the transcription factor Jun in neuronal development within the Drosophila melanogaster eye imaginal disc.
To elucidate the relationship between Jun expression and photoreceptor cell fate determination.

Main Methods:

Analyzing the temporal and spatial expression patterns of Jun in the eye imaginal disc.
Expressing dominant-negative and constitutively active forms of Jun in specific cell populations.
Investigating the effects of Jun manipulation on photoreceptor differentiation and cell fate.
Examining the interaction between Jun and the sevenless/Ras signaling pathway.

Main Results:

Jun expression correlates with photoreceptor fate determination in the eye imaginal disc.
Inhibition of Jun function leads to a dose-dependent loss of photoreceptors.
Overexpression of Jun can induce the formation of additional photoreceptor cells.
Jun acts downstream of the sevenless/Ras pathway, modulating its effects on cell fate.

Conclusions:

Jun is essential for proper neuronal development and photoreceptor differentiation in the Drosophila eye.
Jun functions as a critical downstream component of the sevenless/Ras signaling pathway in regulating neuronal fate.
Understanding Jun's role provides insights into the genetic control of neurogenesis.