Chloroquine, a 70-year-old malaria drug can block immune cells in the liver so nanoparticles can arrive at their intended tumor site, overcoming a significant hurdle of targeted drug delivery. Using chloroquine, the researchers not only increased the circulation of nanoparticles in the body, but also reduced the body's filtration of nanoparticles, as well as improved drug delivery to breast tumors. The study was recently published in Scientific Reports, a research journal from the Nature Publishing Group.
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