1. Extending the emission peak tail of indole cyanine for deep-near-infrared bioimaging.
- Author
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Yu J, Rong J, Yuan S, He X, Chu X, Chen L, Liu Q, Hu S, and Wang Z
- Subjects
- Animals, Mice, Humans, Spectroscopy, Near-Infrared methods, Optical Imaging, Carbocyanines chemistry, Cell Line, Tumor, Glucose metabolism, Glucose chemistry, Indoles chemistry, Fluorescent Dyes chemistry
- Abstract
We propose a novel strategy for tailoring the structure of fluorescent molecules to achieve emission at the tail end of the NIR-II window. The favorable spectroscopic properties and low cytotoxicity of YNs make them powerful tools for bioimaging. Notably, YN-4 exhibits a brightness 2.5 times greater than YN-3, 6 times that of IR-783, and 5 times that of ICG. This enhanced brightness enabled high-resolution imaging of mouse thoracic and abdominal cavities, tumor vasculature, and real-time monitoring of gastrointestinal motility using YN-4. Furthermore, covalent grafting of glucose onto the YN-Glu scaffold significantly improved tumor-targeting capability and facilitated tracking of glucose metabolism. This work aims to extend the application of fluorescent molecule imaging beyond the NIR-IIa window., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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