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Safer creation of stem cells

Replacing viruses that alter DNA makes embryonic-like stem cells safer for possible therapies

1:32pm, September 25, 2008
Get rid of DNA-altering viruses — check.

In a crucial step toward realizing medical treatments based on embryonic-like stem cells, researchers have found a safer way to revert adult mouse cells to an embryonic state. The new technique, reported online September 25 in Science, avoids using viruses that alter the cells’ DNA, a major goal among stem-cell researchers since these DNA mutations can lead to cancer.

Such reprogrammed cells could sidestep the controversy surrounding the

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