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certain diseases with a patient's own cells.
In a second cellular programming trick, scientists transformed mature cells in live mice from one specialized type to another. This destroys the blastocyst. The potential for a new source of embryonic-like stem cells came via breakthrough paper from a team of Japanese researchers. Named the number two breakthrough of the , the Japanese team created iPS cells from mouse tail cells through the simple insertion bit of biological witchcraft flew in the face of years of results that suggested that cell development was a one-way street. It has provided much greater understanding into the nature of biological and chemical processes that enable cells to stably adopt a specialized role, and has opened the doors to the field that's now being called cellular programming. Both of these techniques potentially side stepp the political mine-field that surrounds human embryonic stem cells.Ten years ago, a team from the University of Wisconsin-Madison developed a technique to get human embryonic stems cells (hES) from human blastocysts. This, not terribly surprisingly, ignited a large debate over bioethics since the procedure often