As a result of private research, more than 60 genetically diverse stem cell lines already exist.
He said that private research had produced more than 60 genetically diverse stem cell lines that could reproduce themselves indefinitely and that he had decided to allow federal money to be used for research on the existing lines.
Wading into a complicated and controversial ethical debate, Mr. Bush said private research had already produced more than 60 genetically diverse stem cell colonies, or lines, that could reproduce themselves indefinitely and be immensely valuable in medical research.
His thinking crystallized on Aug. 2, aides said, when he talked to scientists at the National Institutes of Health and was told that there were perhaps more than 60 genetically diverse stem cell lines already in existence, far more than anyone had known.
This study reveals a Notch COLV Calcitonin receptor signalling cascade that maintains satellite cells in a quiescent state in a cell-autonomous fashion, and raises the possibility that similar reciprocal mechanisms act in diverse stem cell populations.
In his televised speech the president surprised the research community by announcing that, even under his restrictive policy, scientists would have more than 60 genetically diverse stem cell lines, or colonies, to work with, far more than anyone had previously imagined.
In the past, derivation of hepatocytes from diverse (stem) cell types has been reported.
The functional relationship between the diverse stem cell (SC) pools is not known and molecular signals regulating the establishment and maintenance of SC compartments are not well understood.
Our study therefore suggests that Drosophila stem cells employ cell intrinsic mechanisms to ensure stem cell self-renewal that are independent of the tissue specific modes of stem cell fate decisions and shared by diverse stem cell populations.
