Scientists create nano-size packets of genetic code aimed at brain cancer `seed` cells
(PHYSorg.com Nanotechnology)

In a `proof of concept` study, scientists at Johns Hopkins Medicine say they have successfully delivered nano-size packets of genetic code called microRNAs to treat human brain tumors implanted in mice. The contents of the super-small containers were designed to target cancer stem cells, a kind of cellular `seed` that produces countless progeny and is a relentless barrier to ridding the brain of malignant cells.