Word: bone
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DIED. Susan Butcher, 51, champion musher who won the Iditarod dogsled race four times, the first in 1986; of complications from a bone-marrow transplant to treat polycythemia vera, a rare blood disease; in Seattle, Wash. Of the grueling, 1,152-mile slog through the Alaskan wilderness Butcher once said, "I do not know the word quit. Either I never did, or I have abolished...
...body uses UV light to make vitamin D, which is vital for bone health, but the fair-skinned need only a few minutes of summer-sun exposure on the face and forearms and can get their winter D from fortified milk or vitamins...
...valuable than scientists initially hoped. Although about 90% of cord-blood stem cells are precursors for blood and immune cells, the remaining 10% give rise to liver, heart-muscle and brain cells and more. Over the past five years, cord-blood transplants have become an increasingly popular alternative to bone-marrow transplants for blood disorders, particularly when a bone-marrow match can't be found...
Less plastic than cord-blood cells are adult stem cells, which until recently researchers thought couldn't do much more than regenerate cell types that reflected the stem cells' origin--blood and immune cells from bone marrow, for example. Even so, some scientists believe adult stem cells may prove to be a powerful source of therapies. "In some cases, you may not want to go all the way back to embryonic stem cells," says Kurtzberg. "You may want something more specific or less likely to stray. You wouldn't want to put a cell in the brain and find...
...they are useful Although they are primarily made up of blood stem cells, they also contain stem cells that can turn into bone, cartilage, heart muscle and brain and liver tissue. Like adult stem cells, they are harvested without the need for embryos...