Modification of nanodiamonds for fluorescence bioimaging

Area of Science:

• Biotechnology
• Materials Science
• Nanotechnology

Background:

• Non-invasive bioimaging is crucial for pre-clinical diagnosis and therapy.
• Developing stable, low-toxicity, high-resolution imaging probes is key for advanced bioimaging.
• Fluorescent nanodiamonds are actively researched for bioimaging applications.

Purpose of the Study:

• To chemically modify nanodiamonds using a stable fluorophore for bioimaging applications.
• To evaluate the biocompatibility, cellular uptake, and imaging potential of modified nanodiamonds.
• To establish an efficient alternative method for preparing fluorescent nanodiamonds.

Main Methods:

• Synthesized nanodiamonds via detonation and high-pressure high-temperature milling.
• Chemically coupled a perylene diimide derivative (stable fluorophore) to nanodiamonds using carbodiimide coupling.
• Assessed biocompatibility, cellular uptake, and fluorescent imaging capabilities in mesenchymal stromal cells.

Main Results:

• Successfully created chemically modified fluorescent nanodiamonds.
• Demonstrated good biocompatibility and efficient cellular uptake in mesenchymal stromal cells.
• Confirmed the potential for high-resolution fluorescent imaging.

Conclusions:

• The carbodiimide coupling method provides an efficient route to fluorescent nanodiamonds for bioimaging.
• These modified nanodiamonds offer a promising platform for pre-clinical diagnosis and therapy.
• Chemical tunability of the perylene diimide structure allows for optimization of optical properties.