Ultrabright organic dots with aggregation-induced emission characteristics for cell tracking

Area of Science:

• Biomedical Engineering
• Cellular Biology
• Materials Science

Background:

• Noninvasive fluorescence cell tracking is vital for understanding cell migration in various biomedical fields.
• Current methods like fluorescent protein transfection face limitations including cell-type specific expression, delayed readout, and potential immunogenicity.

Purpose of the Study:

• To develop novel, ultra-bright organic dots with aggregation-induced emission (AIE dots) for improved cellular imaging and long-term cell tracking.
• To evaluate the performance of AIE dots as an alternative to existing cell labeling techniques.

Main Methods:

• Synthesis of ultra-bright organic dots exhibiting aggregation-induced emission (AIE).
• Characterization of AIE dots for fluorescence, photostability, cellular retention, and biocompatibility.
• Comparison of AIE dot labeling with the pMAX-GFP plasmid method in various human cell lines for cell tracking efficacy.

Main Results:

• AIE dots demonstrated high fluorescence, exceptional photostability, and excellent cellular retention and biocompatibility.
• AIE dots achieved superior cell labeling across all tested human cell lines compared to the pMAX-GFP plasmid approach.
• The developed AIE dots exhibited enhanced tracing performance for long-term cell monitoring.

Conclusions:

• Ultra-bright AIE dots provide a reliable, stable, and efficient method for noninvasive cell tracking.
• AIE dots offer significant advantages over traditional methods, showing broad applicability in cell-based research and therapies.
• This advancement opens new avenues for cell-based immunotherapies and related biological investigations.