PEGylated ATP-Independent Luciferins for Noninvasive High-Sensitivity High-Speed Bioluminescence Imaging
Xiaodong Tian1,2, Yiyu Zhang1,2, Hui-Wang Ai1,2,3
1Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, United States.
ACS Chemical Biology
|December 23, 2024
Summary
Researchers developed novel caged PEGylated luciferins, enhancing bioluminescence imaging (BLI) in animal studies. These improved substrates offer greater solubility and stability, enabling brighter and more sensitive imaging of biological processes.
Area of Science:
- * Biomedical Imaging
- * Chemical Biology
- * Molecular Biology
Background:
- * Bioluminescence imaging (BLI) is a key non-invasive technique for animal research.
- * NanoLuc luciferase reporters offer high photon output and ATP independence.
- * Existing luciferin substrates face challenges with low solubility and auto-oxidation, limiting *in vivo* applications.
Purpose of the Study:
- * To overcome limitations of current luciferin substrates for enhanced BLI.
- * To develop novel luciferin derivatives with improved solubility and stability.
- * To achieve brighter and more sensitive *in vivo* bioluminescence imaging.
Main Methods:
- * Development of caged PEGylated luciferins with enhanced water solubility.
- * Testing of auto-oxidation resistance and solubility of new luciferin derivatives.
- * Evaluation of *in vivo* bioluminescence in mouse models using NanoLuc luciferase.
Main Results:
- * Developed luciferins exhibit water solubility up to 25 mM.
- * New substrates demonstrate increased resistance to auto-oxidation.
- * Achieved substantial increases in *in vivo* bioluminescence, enabling high-speed imaging.
Conclusions:
- * The novel caged PEGylated luciferins represent the brightest and most sensitive luciferase-luciferin combination to date.
- * This advancement facilitates high-speed video-rate imaging of freely moving mice.
- * These substrates offer significant potential for diverse chemical, biological, and biomedical research applications.
