Ratiometric Fluorescent pH Probes Based on Glycopolymers

Area of Science:

• Biomaterials Science
• Chemical Biology
• Nanotechnology

Background:

• Accurate pH detection is crucial for understanding cellular functions and disease states.
• Existing pH probes may lack stability, targeting capabilities, or biocompatibility for in vivo applications.

Purpose of the Study:

• To design and synthesize a novel ratiometric fluorescent pH probe based on a glycopolymer.
• To equip the probe with serum-stability, tumor-targeting, and pH monitoring capabilities for bioapplications.

Main Methods:

• Synthesis of random copolymers via reversible addition fragmentation chain transfer polymerization.
• Attachment of a rhodamine B derivative via thiol-ene reaction to create ratiometric fluorescent probes.
• Characterization using NMR, GPC, UV-vis, TEM, and fluorescence spectroscopy; cytotoxicity and confocal imaging in HeLa cells.

Main Results:

• Successful synthesis and characterization of the glycopolymer-based ratiometric pH probe.
• Demonstrated serum-stability, tumor-targeting potential, and effective pH monitoring in vitro.
• Exhibited low cytotoxicity and superior biocompatibility in HeLa cell experiments.

Conclusions:

• The developed glycopolymeric pH probe is a promising tool for sensitive and specific detection of pH variations in biological systems.
• Its unique properties facilitate potential applications in advanced biomedical imaging and diagnostics.
• Further research may explore its in vivo efficacy for disease monitoring and targeted therapy.