Drugs that are used to cure different ailments have often been found to contain cancer-treating elements.In another such development, scientists found that a 70-year-old malaria drug can block immune cells in the liver so nanoparticles can arrive at their intended tumour site, overcoming a significant hurdle of targeted drug delivery. Many times, chemotherapy drugs don't reach the cancer cells because of which patients don't respond well to the treatment.Even in nanomedicine, only about one percent of a dose of nanoparticles will successfully arrive at the intended tumour site, while the rest are filtered out by the immune cells of the liver and spleen.

However, using the drug chloroquine 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 tumours, the researchers said.The…