Fluorescent, Prussian Blue-Based Biocompatible Nanoparticle System for Multimodal Imaging Contrast.

Area of Science:

• Nanotechnology
• Materials Science
• Biomedical Imaging

Background:

• Prussian blue nanoparticles (PBNPs) are a previously described nanosized platform.
• Developing a fluorescent dye-labeling technique for PBNPs was a primary objective.
• Characterization and stability assessment of dye-labeled PBNPs were also key goals.

Purpose of the Study:

• To develop and characterize fluorescent dye-labeled Prussian blue nanoparticles (PBNPs).
• To evaluate the suitability of these labeled PBNPs for in vivo optical imaging and contrast enhancement.

Main Methods:

• Adsorption of fluorescent dyes (Eosin Y, Rhodamine B, Methylene Blue) onto PBNPs.
• Comprehensive physicochemical characterization using AFM, DLS, zeta potential, electron microscopy, XRD, and FTIR.
• In vivo evaluation of a Methylene Blue-labeled, PEG-stabilized PBNP platform in mice for distribution and imaging.

Main Results:

• Methylene Blue-labeled PBNPs exhibited strong fluorescence emission at 662 nm.
• The fluorescent PBNP-MB platform demonstrated applicability for in vivo optical imaging due to light emission and steric stabilization.
• Physicochemical properties of the dye-labeled PBNPs were thoroughly determined.

Conclusions:

• Successfully developed a stable, fluorescent Prussian blue-based nanosystem.
• The PBNP-MB system serves as an effective platform for imaging contrast enhancement.
• In vivo studies provided insights into the stability and biodistribution of PBNPs for imaging applications.