Scientists create stem cells purged of carcinogens used in process

Researchers report that they have turned skin cells from patients into iPS cells free of the cancer-causing viruses and genes needed to create them. iPS cells are key in regenerative medicine. Borrowing a biological cut-and-paste trick from bacteria, scientists have created the first personalized stem cells for patients that are free of the cancer-causing viruses and genes needed to make them, according to a study released today by the journal Cell.

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