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Radiopaque iodinated copolymeric nanoparticles for X-ray imaging applications
Hagit Aviv1, Sonke Bartling, Fabian Kieslling
1Dept. of Chemistry, Bar-Ilan University, Ramar-Gan 52900, Israel.
Biomaterials
|July 14, 2009
Summary
New iodinated copolymeric nanoparticles, P(MAOETIB-GMA), offer improved stability for X-ray imaging. These radiopaque nanoparticles enhance CT imaging of blood vessels, liver, and lymph nodes, aiding in tumor detection.
Area of Science:
- Materials Science
- Nanotechnology
- Radiology
Background:
- Previous iodinated homopolymeric nanoparticles (PMAOETIB) showed instability and agglomeration in aqueous dispersions above 0.3% concentration.
- This instability limited their potential use as in vivo contrast agents for medical X-ray imaging.
Purpose of the Study:
- To develop stable, iodinated copolymeric nanoparticles for enhanced X-ray contrast imaging.
- To overcome the agglomeration issues observed with homopolymeric nanoparticles.
Main Methods:
- Emulsion copolymerization of 2-methacryloyloxyethyl(2,3,5-triiodobenzoate) (MAOETIB) with glycidyl methacrylate (GMA).
- Synthesis of P(MAOETIB-GMA) nanoparticles with improved surface hydrophilicity and stability.
Main Results:
- Copolymeric nanoparticles (P(MAOETIB-GMA)) exhibited enhanced stability in aqueous phases compared to PMAOETIB.
- CT imaging in rats and mice showed improved blood pool visibility for 30 minutes post-injection.
- Significant enhancement of lymph nodes, liver, and spleen due to reticuloendothelial system uptake was observed.
Conclusions:
- P(MAOETIB-GMA) nanoparticles are stable and suitable for in vivo X-ray contrast imaging.
- These nanoparticles enable differentiation of cancerous from healthy liver tissue, suggesting utility for tumor imaging.
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