One way doctors try to fix them is to replace the bone marrow cells.
According to the doctors, the bone marrow cells could re-educate the immune system so it wouldn't reject the hands.
But he's received an infusion of the donor's bone marrow cells to further prevent rejection of his new arms.
Another approach, being tested by many academic labs and hospitals, involves injecting bone marrow cells into damaged areas of the heart.
The researchers also demonstrated that severe injury is not necessary for the formation of mature liver cells from bone marrow cells.
The scientists transplanted pig bone marrow cells into the mice.
Another possibility is a bone marrow transplant - the existing bone marrow cells are destroyed using chemotherapy, then new, healthy ones are transplanted in to take over their job.
The first solid evidence implicating stem cells in cancer came in the early 1990s when John Dick, a stem cell researcher at the University of Toronto, developed a method for transplanting cancerous human bone marrow cells into mice.
In fact, other researchers have already managed to persuade adult bone marrow stem cells to develop into brain neurons.
Its technique involves extracting a patient's own bone-marrow cells, isolating certain stem cells, and delivering the gene therapy before returning the cells to the body.
Northwestern University School of Medicine Researchers Christopher Bissonnette and Jack Kessler converted stem cells (general cells in the bone marrow) into brain cells that can be used to replace damaged neurons.
SCID, for example, bone-marrow precursor cells can be removed, treated and then injected back into place.
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The transplanted bone marrow contains stem cells that can turn into skin cells.
Common to all AMLs is the fact that the bone marrow produces these cells, but they fail to fully mature.
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But it turned out to have a positive impact on myeloma, interfering with the surrounding environment in the bone marrow that the cancer cells need to flourish.
In a study in mice, they injected stem cells from bone marrow into skeletal muscles of limbs.
When someone receives a bone marrow transplant as a treatment for cancer, what they are getting is an injection of the hematopoietic stem cells that are found in bone marrow.
Dr. Siegel says he will then transplant stem cells in the bone marrow to restore the marrow killed by chemotherapy.
If a match is found the donation of bone marrow involves the removal of stem cells from the hip bone.
For about a decade, scientists have experimented with the use of stem cells to try and repair the heart, mostly in animals and mostly using stem cells derived from bone marrow.
Aastrom was founded in 1991 to commercialize bone-marrow transplant technology aimed at growing cells outside the body.
Verfaillie's study indicates that very rare cells harvested from adult bone marrow can have the same benefits.
For regeneration to continue, stem cells from both the bone marrow and the heart itself must be coaxed to grow a second layer of tissue that is necessary for the formation of arteries, which are bigger and thicker than capillaries.
If these cells replace patients' own bone marrow, the results could be dramatic.
Macchiarini performed the nine-hour operation on April 9 at the Children's Hospital of Illinois after carefully creating the windpipe using stem cells from Hannah's bone marrow that were saturated over a matrix of plastic fibers shaped into a tube.
Cells from the baby's bone marrow or umbilical cord are used to treat the older child.
Someday he envisions cancer centers storing giant banks of premade T cells to match the patients' bone marrow and tumor types.
Novartis' breakthrough cancer drug Gleevec helped somewhat but failed to dislodge the mutant cells from their hideout inside his bone marrow.
It was seeded with stem cells obtained from Hannah's bone marrow.
Novartis (nyse: NVS - news - people )' breakthrough cancer drug Gleevec helped somewhat but failed to dislodge the mutant cells from their hideout inside his bone marrow.
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