They used cells from blood to make induced pluripotent stem cells or iPS cells - lab-made cells that closely resemble human embryonic stem cells but are made from ordinary tissue.
These iPS cells have in the past been made from plugs of skin, but blood is much easier to take from people and to store, the researchers reported in the journal Cell Stem Cell.
"Blood is the easiest, most accessible source of cells, because you'd rather have 20 milliliters of blood drawn than have a punch biopsy taken to get skin cells," Judith Staerk of the Whitehead Institute for Biomedical Research in Massachusetts, who worked on the study, said in a statement.
Stem cells are the body's master cells, the source of renewed blood and tissue. So-called adult stem cells exist through life but they are partially developed.
Embryonic stem cells from days-old embryos have the ability to become all the cell types in the body and also can proliferate in the lab for years.
IPS cells are made by activating three or four genes that distinguish embryonic stem cells.
READ MORE from Reuters
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