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Imaging Approaches to Assessments of Toxicological Oxidative Stress Using Genetically-encoded Fluorogenic Sensors
Published on: February 7, 2018
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Genetic approaches for targeted oxidative stress
Aninda Dey1,2, Ryan P Barnes1,2
1Department of Cancer Biology, The University of Kansas Medical Center, Kansas City, Kansas, 66160, United States.
NAR Cancer
|December 25, 2025
Summary
Cancer therapies using genetically engineered tools to produce reactive oxygen species (ROS) show promise. These light-activated photosensitizers target cancer cells, offering new avenues for oxidative stress-based treatments.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Cancer cells exhibit altered metabolism, leading to excessive reactive oxygen species (ROS) and oxidative stress.
- Tumors possess upregulated antioxidant defenses but remain vulnerable to further oxidative damage.
- ROS can modify proteins, lipids, and nucleic acids, impairing cellular function.
Purpose of the Study:
- To review genetic tools for targeted ROS production in cellular and organismal models.
- To focus on tools offering spatial and temporal control over ROS generation.
- To discuss the advantages and disadvantages of these tools for research and clinical applications.
Main Methods:
- Genetic fusion of photosensitizers to target proteins.
- Light-induced activation of photosensitizers to generate ROS.
- Application in cellular and organismal models for studying ROS effects.
Main Results:
- Development of genetically encoded tools for controlled ROS production.
- Demonstration of ROS-induced protein inactivation, DNA damage, and cell ablation.
- Evaluation of photosensitizer efficacy and specificity in different models.
Conclusions:
- Genetically targeted ROS production offers a promising strategy for cancer therapy.
- Photosensitizer-based approaches provide spatial and temporal control over oxidative stress.
- These tools have significant potential for both basic research and translational applications in oncology.
