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Transgenic animals with inducible, targeted gene expression in brain
1Laboratory of Molecular Psychiatry and Center for Genes and Behavior, Departments of Psychiatry and Neurobiology, Yale University School of Medicine, New Haven, Connecticut 06508, USA.
Molecular Pharmacology
|September 9, 1998
Summary
Researchers developed new transgenic mice with a modified tetracycline-regulated system for precise control of gene expression in specific brain regions. This system allows high transgene levels and effective on/off switching using doxycycline, offering powerful tools for neuroscience research.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Traditional transgenic mice have limitations in controlling gene expression.
- Existing tetracycline-regulated systems show promise but need improvement for high-level, inducible in vivo expression.
Purpose of the Study:
- To develop a novel inducible gene expression system for precise control in specific brain regions.
- To overcome limitations in current tetracycline-regulated systems for in vivo applications.
Main Methods:
- Generation of transgenic mice using a modified tetracycline-regulated system.
- Control of transgene expression via the neuron-specific enolase promoter.
- Testing with reporter (luciferase) and transcription factor (DeltaFosB, CREB) transgenes.
Main Results:
- Achieved tissue-specific transgene expression in brain regions like the striatum, cerebellum, hippocampus, and neocortex.
- Demonstrated complete gene silencing with low-dose doxycycline.
- Confirmed very high transgene expression levels in the absence of doxycycline.
Conclusions:
- The developed system provides high-level, inducible, and tissue-specific transgene expression in the brain.
- These transgenic mice are powerful tools for studying gene function in specific neural circuits.
- The system offers improved control over gene expression compared to previous methods.