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February 17, 2010

When scientists first created induced pluripotent stem cells (iPS cells) three years ago, they were hailed as a game-changing advance for medicine: Scientists hoped the engineered cells could duplicate the talents of embryonic stem cells, which can develop into any kind of cell in the body, while avoiding the destruction of embryos. However, a new study by one of the leading U.S. cell labs suggests that iPS cells, at least right now, have serious problems keeping them from reaching their potential.