Doyle and Kagen on Today's Stem Cell News
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Hmm. Guess they're both going for the 10:00 evening news.
Labels: stem cell research
Sic Semper Tyrannis
Labels: stem cell research
Scientists have made ordinary human skin cells take on the chameleon-like powers of embryonic stem cells, a startling breakthrough that might someday deliver the medical payoffs of embryo cloning without the controversy.
Laboratory teams on two continents report success in a pair of landmark papers released Tuesday. It's a neck-and-neck finish to a race that made headlines five months ago, when scientists announced that the feat had been accomplished in mice.
The "direct reprogramming" technique avoids the swarm of ethical, political and practical obstacles that have stymied attempts to produce human stem cells by cloning embryos.Scientists familiar with the work said scientific questions remain and that it's still important to pursue the cloning strategy, but that the new work is a major coup.
"This work represents a tremendous scientific milestone - the biological equivalent of the Wright Brothers' first airplane," said Dr. Robert Lanza, chief science officer of Advanced Cell Technology, which has been trying to extract stem cells from cloned human embryos.
"It's a bit like learning how to turn lead into gold," said Lanza, while cautioning that the work is far from providing medical payoffs.
"It's a huge deal," agreed Rudolf Jaenisch, a prominent stem cell scientist at the Whitehead Institute in Cambridge, Mass. "You have the proof of principle that you can do it."
[...]
The new work is being published online by two journals, Cell and Science. The Cell paper is from a team led by Dr. Shinya Yamanaka of Kyoto University; the Science paper is from a team led by Junying Yu, working in the lab of in stem-cell pioneer James Thomson of the University of Wisconsin-Madison.
Both reported creating cells that behaved like stem cells in a series of lab tests.
Thomson, 48, made headlines in 1998 when he announced that his team had isolated human embryonic stem cells.
Both labs did basically the same thing. Each used viruses to ferry four genes into the skin cells. These particular genes were known to turn other genes on and off, but just how they produced cells that mimic embryonic stem cells is a mystery.
"People didn't know it would be this easy," Thomson said. "Thousands of labs in the United States can do this, basically tomorrow."
The Wisconsin Alumni Research Foundation, which holds three patents for Thomson's work, is applying for patents involving his new research, a spokeswoman said. Two of the four genes he used were different from Yamanaka's recipe.
Labels: stem cell research
Labels: political games, stem cell research
Rep. Diana DeGette, D-Colo., a leading advocate of the legislation, did not dispute that assessment in an interview. "If he does veto it again it will just show his complete unwillingness to look at this research that holds the potential for cure of these diseases," she said.DeGette is wrong. Bush will show is complete unwillingness to destroy human embryos to further research.
More research does need to be conducted before we know if the reprogramming will work in humans. However, this is a step in the right direction. Instead of pushing for the destruction of life, more time and energy should be expended towards improving this process.In a big step toward a long-sought goal, three teams of scientists say they've produced the equivalent of embryonic stem cells, at least in mice, without taking the controversial step of destroying embryos.
Genetic "reprogramming" of mouse cells can create cells that mimic embryonic stem cells, biologists report Wednesday, pioneering a new approach to so-called "regenerative" medicine.
The findings by three teams publishing in the journals Nature and Cell Stem Cell mean the reprogrammed cells may offer a less-controversial way to make rejection-free tissues for transplant patients.
Labels: stem cell research