In order to differentiate and specialize, stem cells require very specific environmental cues in a very specific order, and scientists have so far been unable to prod them to go through each of the necessary steps.
But now, for the first time, a study in mice by Rockefeller University scientists shows that embryonic stem cells implanted in the brain appear to develop into fully differentiated granule neurons, the most plentiful neuron in the cerebellum. The findings were reported in the online edition of Proceedings of the National Academy of Sciences.
Embryonic stem cells have shown a great deal of promise for alleviating heart disease and regenerating organs. But for some of the conditions for which people hold out the most hope -- Alzheimer's and Parkinson's, for example -- there's been little evidence to date that stem cells can work.
Part of the problem is that neural stem cells, especially those involved in brain development, specialize as they mature and lose their ability to diversify. They require very specific environmental cues in a very specific order, and scientists have so far been unable to prod them to go through each of the necessary steps. But now, for the first time, a new study in mice shows that embryonic stem cells implanted in the brain appear to develop into fully differentiated granule neurons, the most plentiful neurons in the cerebellum.
Whole article: "www.medicalnewstoday.com":[ http://medicalnewstoday.com/medicalnews.php?newsid=65300]
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