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Visualizing gene expression in living mammals using a bioluminescent reporter
C H Contag1, S D Spilman, P R Contag
1Department of Pediatrics, Stanford University School of Medicine, CA 94305-5119, USA. ccontag@cmgm.stanford.edu
Photochemistry and Photobiology
|October 24, 1997
Summary
Researchers developed a noninvasive bioluminescence method to track gene expression in living mammals. This technique allows real-time monitoring of gene regulation and DNA delivery in animal models, advancing disease and development studies.
Area of Science:
- Molecular Biology
- Biotechnology
- Medical Imaging
Background:
- Gene expression regulation is complex and can be obscured by ex vivo analysis.
- In vivo monitoring of gene regulatory pathways is crucial for understanding biological processes.
Purpose of the Study:
- To develop a noninvasive method for monitoring gene expression in living mammals.
- To demonstrate the utility of luciferase reporter systems for tracking gene regulation and DNA delivery in vivo.
Main Methods:
- Utilized firefly luciferase as a transgene reporter fused to viral promoters in mice.
- Employed intensified or cooled charge-coupled device cameras for in vivo bioluminescence detection.
- Administered luciferase substrate topically and systemically for detection in superficial and deep tissues.
Main Results:
- Successfully monitored gene expression in living mice using bioluminescence.
- Demonstrated in vivo control of the human immunodeficiency virus promoter.
- Detected in vivo transfection of a luciferase expression vector, modeling DNA-based therapies and vaccines.
Conclusions:
- Luciferase reporter systems enable noninvasive, real-time monitoring of gene regulation, DNA delivery, and expression in living mammals.
- This technology facilitates the study of gene expression in animal models for human development and disease.