As researchers develop novel therapies based on inducing specific cells to do specific things, getting the right message to the right group of cells at the right time remains a major challenge. The use of light to communicate with cells has been restricted by its limited ability to pass through tissues. Now researchers at the Wellman Center for Photomedicine at Massachusetts General Hospital have developed a way to deliver a light signal to specific tissues deep within the body. They describe their accomplishment in the current issue of Nature Photonics.
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