Researchers at the California Institute of Technology developed synthetic RNA that destroyed lab grown human brain, prostate and bone cancer cells seemingly without harming healthy ones. The synthetic RNA reacts to the mutated RNA in a cell that is causing it to be cancerous. The result is that a third type of RNA is created in the cell which is attacked by the body's own immune system. (The immune system thinks it is a virus.) The cancerous cell resultantly dies. Noncancerous cells were not measurably affected. The work has been published in the 9/6/10 issue of the journal, Proceedings of the National Academy of Sciences.