A British researcher and a Japanese scientist won the Nobel Prize in physiology or medicine on Monday for discovering that ordinary cells of the body can be reprogrammed into stem cells, which then can turn into any kind of tissue — a discovery that may led to new treatments. Scientists want to build on the work by John Gurdon and Shinya Yamanaka to create replacement tissues for treating diseases like Parkinson’s and diabetes, and for studying the roots of diseases in the laboratory — without the ethical dilemma posed by embryonic stem cells.
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