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Doxycycline-induced transgene expression during Drosophila development and aging
E T Bieschke1, J C Wheeler, J Tower
1Department of Biological Sciences, University of Southern California, Los Angeles 90089-1340, USA.
Molecular & General Genetics : MGG
|July 22, 1998
Summary
Researchers developed a doxycycline-inducible gene expression system for Drosophila. This system allows controlled gene activation in various tissues and life stages, showing potential for studying gene function in development and aging.
Area of Science:
- Molecular Biology
- Genetics
- Developmental Biology
Background:
- The tetracycline-inducible system offers controllable gene expression.
- Previous systems were effective in mammals but not adapted for Drosophila.
- The reverse tetracycline repressor (rtR) fused with VP16 forms the rtTA transactivator.
Purpose of the Study:
- To adapt the doxycycline-inducible system for use in Drosophila.
- To establish a method for controlled gene expression in fruit flies.
Main Methods:
- Constitutive expression of rtTA in transgenic Drosophila using the Actin5C promoter.
- Introduction of reporter constructs with beta-galactosidase (beta-gal) linked to tetO sequences and core promoters (Adh or hsp70).
- Administration of doxycycline (dox) to transgenic flies.
Main Results:
- Doxycycline induced up to 100-fold beta-gal expression in transgenic Drosophila.
- Gene induction was observed across all tissues, life stages (larvae, adults), and ages.
- Beta-gal induction did not affect adult lifespan.
Conclusions:
- The developed system enables doxycycline-dependent gene expression in Drosophila.
- This system is suitable for investigating gene functions in Drosophila development and aging.
- The system demonstrates broad applicability across tissues and life stages.