Mitochondria-Targeted Fluorescent Nanoparticles with Large Stokes Shift for Long-Term BioImaging

Area of Science:

• Biomedical Engineering
• Molecular Imaging
• Nanotechnology

Background:

• Mitochondria are crucial for physiological processes and implicated in diseases like cancer and Alzheimer's.
• Real-time monitoring of mitochondrial activity is increasingly important for disease diagnosis and research.
• Existing imaging techniques may have limitations in sensitivity, stability, or cytotoxicity.

Purpose of the Study:

• To develop a novel fluorescent probe for real-time imaging of mitochondria.
• To create a probe with enhanced properties such as low cytotoxicity and high photostability.
• To evaluate the efficacy of the probe for long-term in vitro mitochondrial imaging.

Main Methods:

• Synthesis of amphiphilic aggregation-induced emission (AIE) active AC-QC nanoparticles based on a quinoxalinone scaffold.
• Characterization of the nanoparticles' properties, including cytotoxicity, photostability, and imaging capabilities.
• In vitro experiments to assess the real-time monitoring of mitochondria.

Main Results:

• AC-QC nanoparticles were successfully developed for mitochondrial imaging.
• The probe exhibited lower cytotoxicity compared to conventional probes.
• Superior photostability and effective performance in long-term in vitro imaging were demonstrated.
• The nanoparticles showed excellent ability for real-time monitoring of mitochondria.

Conclusions:

• Self-assembled AC-QC nanoparticles represent a promising new tool for mitochondrial research.
• The developed fluorescent probe is effective and suitable for long-term, real-time mitochondrial imaging.
• This technology holds potential for advancing the study of mitochondrial dysfunction in various diseases.