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The group harvested stem cells from the bone marrow of mice and humans, then inserted them into the brains of mice with a disease that closely resembles MS in humans. They found that the stem cells changed into several different kinds of cells: most importantly, many converted into cells called oligodendrocytes,which manufacture 'white matter'.
But the experiments suggest only areas of fresh damage might be treatable. In the mice tested, the loss of myelin appeared ...
In a bid to sidestep the ethical debate over the use of human embryos in medical research, scientists have developed a way to derive viable stem cell lines without harming the embryo.
They did so by extracting a single cell from the embryo — as in vitro fertilization clinics do when they test for genetic defects and introducing a common molecule called laminin to keep it in a stem cell, or pluripotent, state.
Subsequent development ...
Not nerve cells in particular, but another step forwardThe researchers took dead animal hearts and stripped them of everything except the blood vessels, valves and connective tissue. These scaffolds were then seeded with cells from newborn and foetal rat hearts and, after four days of growth, the organs started to contract. Within eight days, the hearts were beating.
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