  We investigated whether we can detect enhanced magnetic nanoparticle uptake
under application of a large magnetic force by tagging the particles with a
fluorescent dye. Human liver cells were cultured in a micro-channel slide and
exposed to two types of magnetic nanoparticles with a diameter of 100 nm at a
concentration of 10000 particles/cell for 24 hours. Even though we achieved a
magnetic force that exceeded the gravitational force by a factor of 25, we did
not observe a statistically significant increase of immobilised particles per
cell.
