Old drug, new use: The thalidomide-based fluorescent probe for hydrazine detection

Area of Science:

• Chemical Biology
• Biomedical Engineering

Background:

• Thalidomide is a known ligand for cereblon (CRBN), recognized for its role in targeted protein degradation.
• Development of advanced fluorescent probes is crucial for sensitive detection and bioimaging applications.

Purpose of the Study:

• To create a novel hydrazine fluorescent probe, TH-1, with improved optical and biocompatible properties.
• To leverage the thalidomide moiety for enhanced probe performance and expand fluorescent skeleton libraries.

Main Methods:

• Synthesis of the novel thalidomide-based fluorescent probe, TH-1.
• Characterization of TH-1's properties, including colorimetric changes, response time, selectivity, and sensitivity towards hydrazine.
• Verification of the sensing mechanism for hydrazine detection.
• Application of TH-1 for bioimaging of hydrazine in living A549 cells.

Main Results:

• TH-1 demonstrated significant colorimetric changes, rapid response, and high selectivity and sensitivity for hydrazine detection.
• The sensing mechanism of TH-1 for hydrazine was successfully elucidated.
• TH-1 was effectively utilized for in vivo bioimaging of hydrazine in A549 cells.

Conclusions:

• TH-1 is a highly effective fluorescent probe for hydrazine detection with excellent performance characteristics.
• The use of thalidomide as a fluorescent skeleton offers a novel approach for developing advanced fluorescent probes.
• This study expands the library of fluorescent skeletons and highlights the potential for thalidomide-based probes in biological applications.