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New cell line should accelerate embryonic stem cell research
Date:3/14/2014

Researchers at the University of Washington have successfully created a line of human embryonic stem cells that have the ability to develop into a far broader range of tissues than most existing cell lines.

"These cells will allow us to gain a much greater understanding of normal embryonic development and have the real potential for use in developing ways to grow new tissues and organs for transplantation," said Carol Ware, a professor in the UW Department of Comparative Medicine and lead author of a paper describing the new cell line appearing in the March 10 issue of the journal Proceedings of the National Academy of Sciences.

The cells, called nave embryonic stem cells, normally appear at the earliest stages of embryonic development and so retain the ability to differentiate in all the different types of cells of the human body a capacity called pluripotency.

Researchers had been able to develop naive cells using mouse embryonic stem cells but to create naive human embryonic stem cells has required inserting a set of genes that force the cells to behave like naive cells.

While these "transgenic" cells are valuable research tools, the presence of the artificially introduced genes meant the cells will not develop as normal embryonic cells would nor could they be safely used to create tissues and organs for transplantation.

In an article, Ware and her colleagues from the UW Institute for Stem Cell and Regenerative Medicine describe how they successfully created a line of naive human embryonic stem cells without introducing an artificial set of genes.

They first took embryonic stem cells that are slightly more developed, called primed stem cells, and grew them in a medium that contained factors that switched them back or "reverse toggled" them to the naive state.

They then used the reverse toggled cells to develop a culture medium that would keep them in the naive state and create a sta
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Contact: Kim Blakeley
krb13@uw.edu
206-685-1323
University of Washington - Health Sciences/UW News, Community Relations & Marketing
Source:Eurekalert  

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