A light-activated remote control for cells
(PHYSorg.com Nanotechnology)

What if doctors had a remote control that they could use to steer a patient`s own cells to a wound to speed up the healing process? Although such a device is still far from reality, researchers reporting in the ACS journal Nano Letters have taken an important first step: They used near-infrared light and an injected DNA nanodevice to guide stem cells to an injury, which helped muscle tissue regrow in mice.