Optical and Magnetic Resonance Imaging Using Fluorous Colloidal Nanoparticles.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Medical Imaging

Background:

• Improved cancer imaging aids prognosis and patient outcomes.
• Fluorine magnetic resonance imaging (¹⁹F MRI) offers promise for repeated, non-ionizing radiation imaging sessions.
• ¹⁹F MRI detects molecular signatures using fluorinated tracers with high anatomical resolution.

Purpose of the Study:

• To describe a novel fluorous polymeric nanoparticle for ¹⁹F MR imaging and fluorescent tracking.
• To evaluate the nanoparticle's utility for in vitro and in vivo monitoring of immune cells and cancerous tissue.
• To assess the nanoparticle's efficacy in cancer models and potential for systemic disease monitoring.

Main Methods:

• Self-assembly of amphiphilic copolymers into micelles (260 nm hydrodynamic diameter).
• Evaluation of MR activity using phantom imaging studies (as low as 2.1 mM).
• Assessment of cellular uptake, toxicity, and in vivo biodistribution in cancer models (triple-negative breast cancer, ovarian cancer).

Main Results:

• The polymer demonstrated MR activity at low concentrations (2.1 mM).
• The nanoparticle showed rapid uptake into immune cells and significant accumulation in triple-negative breast cancer and ovarian tumors.
• Negligible toxicity and minimal off-target tissue accumulation were observed.

Conclusions:

• The fluorous polymeric nanoparticle is a robust platform imaging agent for ¹⁹F MR imaging and fluorescent tracking.
• It enables effective immune cell tracking and in vivo monitoring of cancerous tissue.
• The nanoparticle demonstrates high tumor uptake in multiple cancer models, indicating potential for systemic disease monitoring.