Stem cell line
A stem cell line is a family of constantly dividing cells, the product of a single embryo. It is obtained from cells found in human or animal tissues and can replicate for long periods of time in vitro (out of the body).
In August 2001, George W. Bush signed legislation that restricted US federal funding to research involving only the 80(?) ‘’’stem cell lines’’’ then in existence. Of the more than 60 such lines then said to be available, only 18 actually ended up for use, for a fee, by researchers on a National Institutes of Health registry.
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Embronic Line creation
Embryonic stem cell lines are created from embryos. A single cell from the embryo is placed in a petri dish and provided with nutrients and growth factors that simulate those found in the womb. The resulting cell line will continue to divide as long sufficient chemistry signals to it that should not begin differentiation.
Adult Stem cell line creation
Adult stem cell lines isolated from mature tissues are also commonly used in stem cell research.
New Techniques
See also: