A new DNA-based logic circuit can sense the signs of cancer, compute that a cell is cancerous, and then cause it to self-destruct, researchers say. The cell-level diagnostic system could be used for drug screening or perhaps for disease treatment, killing tumors while leaving healthy cells alone.
Doctors whose bodies are regularly exposed to x-rays may be adapting at the cellular level to protect themselves against radiation, according to a new study. The research hints that humans could adapt to withstand radiation exposure.
Scientists have long been stymied by human regenerative healing -- that is, wholesale regrowth of, say, a severed limb -- an ability inherent in some species but lost on humans. But new research suggests the ability to regenerate isn't based on something newts and flatworms have that we don't; rather, it's something we do have that's keeping us from regenerating tissues.