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Rapid Optimization of a Light-Inducible System to Control Mammalian Gene Expression
Published on: November 4, 2025
A red/far-red light-responsive bi-stable toggle switch to control gene expression in mammalian cells
Konrad Müller1, Raphael Engesser, Stéphanie Metzger
1Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany.
Nucleic Acids Research
|January 29, 2013
Summary
Scientists developed a novel red/far-red light-triggered gene switch for mammalian cells. This system allows precise control over gene expression in time and space, advancing developmental biology and tissue engineering.
Area of Science:
- Molecular Biology
- Developmental Biology
- Biotechnology
Background:
- Multicellular system development relies on precise gene expression in specialized cells.
- Synthetic tools for spatiotemporal control can enhance understanding of development and tissue engineering.
Purpose of the Study:
- To develop and characterize a red/far-red light-inducible gene expression system for mammalian cells.
- To enable precise spatiotemporal control of gene expression in living systems.
Main Methods:
- Development of a red/far-red light-triggered gene switch.
- Testing reversibility and dose-dependency using light pulses (660/740 nm).
- Quantitative kinetic analysis using a mathematical model and application in chicken embryo angiogenesis.
Main Results:
- Demonstrated reversible on/off switching of gene expression with red/far-red light.
- Confirmed correlation between gene expression and applied photon number.
- Showcased compatibility with various mammalian cell lines, including primary human cells, and successful application in vivo.
Conclusions:
- The developed light-inducible gene switch offers unprecedented spatiotemporal control over gene expression in mammalian cells.
- This technology facilitates molecular interventions in cells, tissues, and organisms, with applications in developmental biology and regenerative medicine.
