Scientists have identified an adult stem cell in bone marrow that can form cells of the liver, lung, skin and gastrointestinal tract. It had been thought by many that only embryonic stem cells had the potential to become cells of different types, which would mean that scientists may have a potential new source of stem cells if the research bears out.
Stem cells are the immature cells that give rise to a variety of specialized cells.
Previously, Krause's team demonstrated that adult stem cells in bone marrow can form new liver cells in mice and in humans, but until now, the researchers did not know that the stem cells could form other types of cells as well, Krause said. Although Krause pointed out that the research, which was carried out in mice, is still in its infancy, bone marrow stem cells may have therapeutic uses, she said. It may be possible to harness the cells to repair damaged tissue, according to Krause. She noted that preliminary animal research has shown that cells derived from bone marrow can repair damage after a heart attack. Another possible use of the cells is in gene therapy, Krause said.