Acridinium Benzoates for Ratiometric Fluorescence Imaging.

Area of Science:

• Chemical Biology
• Biomedical Imaging
• Fluorescence Spectroscopy

Background:

• Acridinium benzoate serves as a versatile ICT-based fluorescent scaffold.
• Decaging of phenolic hydroxyl groups enables ratiometric and turn-on fluorescence imaging.
• Developing specific probes is crucial for in vivo biological analyte detection.

Purpose of the Study:

• To develop a unique ICT-based fluorescent scaffold for advanced imaging applications.
• To create novel fluorescent probes for the sensitive detection of hydrogen peroxide (H₂O₂) and β-galactosidase (β-gal) in vivo.
• To demonstrate the utility of the developed probes in biological imaging.

Main Methods:

• Synthesis and characterization of the acridinium benzoate scaffold.
• Design and synthesis of two specific fluorescent probes: Acr1-H₂O₂ and Acr1-β-gal.
• In vitro and in vivo fluorescence imaging experiments to validate probe performance.

Main Results:

• The acridinium benzoate scaffold successfully facilitated both ratiometric and turn-on fluorescence imaging.
• Acr1-H₂O₂ probe demonstrated effective fluorescence imaging of H₂O₂.
• Acr1-β-gal probe showed specific fluorescence imaging of β-galactosidase activity in vivo.
• The probes exhibited high sensitivity and specificity in biological samples.

Conclusions:

• Acridinium benzoate provides a unique and effective platform for developing advanced fluorescent probes.
• The developed Acr1-H₂O₂ and Acr1-β-gal probes are valuable tools for in vivo imaging of H₂O₂ and β-galactosidase.
• This work advances the field of fluorescence imaging for biological research and diagnostics.