Source: University of California - San Diego
Date: June 8, 2011
Summary:
Researchers at the University of California, San Diego School of Medicine have identified a gene and a novel signaling pathway, both critical for making the first hematopoietic stem cells (HSCs) in developing vertebrate embryos. The discovery has implications for developing stem cell-based therapies for diseases like leukemia and congenital blood disorders.
HSCs are multipotent stem cells that give rise to all blood cell types, including red blood and immune cells. Existing medical treatments using HSCs are hampered by cell shortages and finding compatible matches between donors and recipients. Currently, it is not possible to create HSCs from converted embryonic stem cells or induced pluripotent stem cells -- pluripotent cells artificially derived from non-pluripotent cells, such as skin cells.
"What we need is the ability to generate self-renewing HSCs from patients for treatments," said David Traver, PhD, an associate professor in UCSD's Department of Cellular and Molecular Medicine. "But accomplishing this goal means first understanding the mechanisms involved in creating HSCs during embryonic development."
One of those mechanisms is described for the first time in a paper published by Traver and colleagues in the June 9 issue of the journal Nature.
