Abstract
Monodisperse magnetic nanoparticles conjugated with virus-surface-specific antibodies self-assemble in the presence of specific viral particles to create supramolecular structures with enhanced magnetic properties, as detected by magnetic resonance methods (NMR/MRI). The observed magnetic relaxation changes that occur upon viral-induced assembly allowed for highly sensitive and selective detection of a virus in complex biological media. The developed method was shown to specifically detect adenovirus-5 and herpes simplex virus-1 at concentrations of 5 viral particles/10 muL without the need of extensive sample preparation. The applications of this new method span from high-throughput NMR detection of viruses in biological samples to potential MR imaging of viral distribution in vivo.
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