The polybutylcyanoacrylate nanoparticles of 3H-labeled gentamicin were preparedin order to investigate the possi bili ty of gentamicin nanoparticles as an intracel l u lar dr ug de li ve rysystem for intracellular chemotherapy. The 3H-labeled gentamicin nanoparticles were incubated withmouse peritoneal macrophage(MPM)or rat hepatOcytes(RH)for some period,then the cells wereseparated from the nanoparticles, and finally the radiOactivity(cpm)of 3H in the cells were measuredby a liquid scintillation counter.By...