The Niche

Human embryonic stem cell research stuck on two early lines

Under former US president George W. Bush, fewer than two dozen human embryonic stem cell lines could be studied with federal funding. That number could soon extend into the hundreds, pending ethical review by the US National Institutes of Health. However, research led by Christopher Scott of Stanford University in California shows that of the 20-odd lines available for funding, researchers have so far depended primarily on just 2 of the oldest human embryonic stem cell lines1. 


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