18F labeled nanoparticles for in vivo PET-CT imaging.

Bioconjugate Chemistry
Neal K DevarajRalph Weissleder

Abstract

We report the synthesis and in vivo characterization of an 18F modified trimodal nanoparticle (18F-CLIO). This particle consists of cross-linked dextran held together in core-shell formation by a superparamagnetic iron oxide core and functionalized with the radionuclide 18F in high yield via "click" chemistry. The particle can be detected with positron emission tomography, fluorescence molecular tomography, and magnetic resonance imaging. The presence of 18F dramatically lowers the detection threshold of the nanoparticles, while the facile conjugation chemistry provides a simple platform for rapid and efficient nanoparticle labeling.

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