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New type of human stem cell may be more easy to manipulate
Date:6/8/2010

amming adult cells and have many of the characteristics of human ECSs, including resistance to manipulation in cultures containing the growth factor LIF, which is used in the creation of mouse ESCs.

The resulting cells visibly resembled mouse ESCs and proved amenable to a standard gene manipulation technique that exchanges matching sequences of DNA, allowing the targeted deactivation or correction of a specific gene. The ability to manipulate these new cells depended on both the continued presence of LIF and expression of the five genes that are used in reprogramming adult cells into iPSCs. If any of those factors was removed, these hLR5- (for human LIF and five reprogramming factors) iPSCs reverted to standard iPSCs.

"Genetic changes introduced into hLR5-iPSCs would be retained when they are coverted back to iPSCs, which we then can use to generate cell lines for future research, drug development and someday stem-cell based gene-correction therapies," says Geijsen. He is an assistant professor of Medicine at Harvard Medical School and a principal faculty member of the Harvard Stem Cell Institute.


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Contact: Sue McGreevey
smcgreevey@partners.org
617-724-2764
Massachusetts General Hospital
Source:Eurekalert

Page: 1 2

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