MIT Designed Nanoparticles Target Tumor Cells
You can read about it there, but let me just say how it works, as far as I can see, as a Bear of Very Little Brain.
The new MIT approach differs from that taken by most nanoparticle designers. Typically, researchers try to target their particles to a tumor by decorating them with molecules that bind specifically to proteins found on the surface of cancer cells. The problem with that strategy is that it’s difficult to find the right target — a molecule found on all of the cancer cells in a particular tumor, but not on healthy cells. Also, a target that works for one type of cancer might not work for another.