Researchers Race to Strip Stem Cells of Cancer Risk
The race to craft stem cells that have the virtues, but not the notoriety, of their embryonic brethren faces its final hurdle: becoming safe enough to help patients. Researchers have unveiled a flurry of advances in recent months in the development of "induced pluripotent" stem cells. "Stem cell research pretty clearly has public support, so this is not a hard choice for Obama," says science policy expert Aaron Levine of the Georgia Institute of Technology in Atlanta. But, he cautions, "The opponents will continue to be very vocal."