Resonance Raman Probes for Organelle-Specific Labeling in Live Cells

Area of Science:

• Biophotonics and Spectroscopy
• Cellular and Molecular Imaging
• Nanotechnology for Biomedicine

Background:

• Raman microspectroscopy offers high-resolution, non-invasive molecular analysis of biological samples.
• Current limitations in Raman microspectroscopy include the need for novel molecular probes for specific cellular domain labeling.
• Effective labeling is crucial for guiding spectrochemical spatial imaging and dissecting cellular molecular composition.

Purpose of the Study:

• To design and develop a next-generation Raman probe for enhanced molecular imaging.
• To utilize Resonance Raman (RR) enhancement for high signal intensity with low-toxic red light.
• To validate the probe's utility for targeting and imaging specific organelles in live cells.

Main Methods:

• Design of a novel Raman probe based on the BlackBerry Quencher 650 compound.
• Utilizing the Resonance Raman (RR) enhancement mechanism for signal amplification.
• Application of the RR probes for targeting lysosomes in live cultured cells for Raman imaging.

Main Results:

• The developed Raman probe exhibits unprecedentedly high signal intensity due to RR enhancement.
• RR enhancement is achieved using low-toxic red light, compatible with the biological optical window.
• Successful validation in targeting lysosomes, enabling identification and monitoring of dynamic changes via Raman imaging.

Conclusions:

• The novel BlackBerry Quencher 650-based Raman probe significantly enhances signal intensity for cellular imaging.
• The probe's compatibility with red light and demonstrated utility for lysosome targeting opens new avenues for live-cell organelle analysis.
• This advancement holds breakthrough potential for non-invasive, high-resolution dissection of cellular molecular composition.