Brain can manufacture fresh brain cells
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New evidence shows that the human brain can made fresh brain cells, researchers said in a study that may lead to better ways to treat brain damage and disease. It is known that other animals, such as rats and mice, make new brain cells throughout their lives and there had been indirect evidence that humans being can, too. Using MRI, scans and electron microscope images of tissue donated from the brains of people who died, Maurice Curtis of the University of Auckland in New Zealand and Peter Eriksson of Sahlgrenska Academy in Goteborg, Sweden, and colleagues found the elusive cells. Just as in mice and rats, these cells are born in one part of the brain and then migrate to the olfactory bulb, where smells are processed. They mature into neurons on the way. In animals, they said, brain damage prompts the birth of new cells. "Our study provides the foundation for this possibility in the adult human brain," they wrote in their report, published in the journal Science. Humans have far more developed brains, so searching for these cells has been harder than it was in rodents.
"This opens another direction by which we may discover ways to repair human brains that are damaged from injury or diseases, and underscores the importance of animal research in guiding biomedical research in humans," Baxter said. Another expert, Sebastian Brandner, head of the Division of Neuropathology at the Institute of Neurology at University College London, agreed. "These findings are important for several reasons: Understanding stem cell biology is essential to study brain repair in neurodegenerative diseases such as Alzheimer's and it is even possible that stem cells are the source of some brain tumors," Brandner said in a statement.