Showing posts with label nature of research. Show all posts
Showing posts with label nature of research. Show all posts

Friday, June 08, 2007

A Commercial Perspective on Resetting Stem Cell Clocks

Andrew Pollack of the New York Times wrote a piece Thursday that contained some interesting comments from California folks on mice and resetting their stem cell clocks.

Some excerpts:
"'Once you muck around with the genome, all bets are off,' said Dr. Thomas B. Okarma, chief executive of Geron, a company trying to develop medical treatments from human embryonic stem cells. Dr. Okarma said getting approval from the Food and Drug Administration would become 'enormously more complicated.'"
Pollack continued:
"Joydeep Goswami, vice president for stem cells and regenerative medicine at Invitrogen, a company that sells tools for stem cell research, said the new technique could get more companies interested in stem cells.

"Not only does it eliminate the ethical issues, he said, but it also might provide a way around stem cell patents held by the University of Wisconsin that some scientists and corporate executives say have hindered work in the field.

"Still, an even bigger hurdle for investors has been the uncertainty of whether stem cells can be turned into lucrative medical treatments. Some experts say this might take a decade or more, too long for many investors to wait."
More from Pollack:
"Dr. Okarma of Geron pointed out that after mouse embryonic cells were first isolated, it took about 18 years before human embryonic cells were similarly derived. Geron, based in Menlo Park, Calif., paid for the work with human cells at the University of Wisconsin and has exclusive commercial rights to certain types of tissues created from human embryonic stem cells.

"Dr. Okarma also said it might not be desirable to use skin cells as a starting material because they might have been genetically mutated by exposure to ultraviolet radiation."
Pollack continued:
"William M. Caldwell IV, chief executive of Advanced Cell Technology, said his company had not been able to obtain enough human eggs needed for therapeutic cloning. So the new approach, Mr. Caldwell said, is 'a technology that everyone should take a hard look at.'"

Thursday, June 07, 2007

Turning Back Time on Mice Stem Cells: Implications for California

Does the news that scientists have found a way to reset the clock on adult mice stem cells mean that the California stem cell institute should fold its $3 billion tent and slink off into the night?

A case can be made that announcement reduces the imperative behind CIRM, formed to fund research into human embryonic stem cells because of President Bush's restrictions on federal financing in that area.

But scientists and CIRM are having none of it. Indeed, the Japanese scientist, Shinya Yamanaka of Kyoto University, who made the initial discovery in 2006 predicts that duplicating the procedure in humans would be "more demanding" than the mouse work.

At least three California newspapers visited the subject today, reporting that CIRM and researchers say the development, if ultimately successful, will take years to prove useful in humans and offers just another avenue for potential CIRM funding.

Carl Hall of the San Francisco Chronicle wrote:
"Arlene Chiu, interim chief scientific officer at the California Institute for Regenerative Medicine, the agency in charge of the state's $3 billion stem cell program, said the new work shows a path around a major bottleneck -- the shortage of fresh human eggs available for research.

"'We are interested in new ways of generating pluripotent stem cells,' she said. 'The important thing to us is the product, not the process. But the rarity of eggs is definitely a challenge.'

"Ethical rules in California and other states forbid paying women who undergo the sometimes risky egg-extraction procedures. Harvard's Kevin Eggan, a senior scientist involved in the new experiments, said Wednesday that he and his colleagues have been unable to find even a single egg donor after a year of looking.

"Ethics aside, Eggan said the real reasons his lab pursued an alternative to egg donation 'are really scientific and logistical in nature.' Researchers, he said, are seeking a way to use nonviable embryos.

"In fertility clinics, somewhere between 3 and 10 percent of women's eggs are improperly fertilized, typically with an extra sperm getting inside. That translates into about 15,000 to 50,000 nonviable, one-celled embryos, also known as zygotes."
Steve Johnson of the San Jose Mercury News quoted Christopher Thomas Scott, executive director of Stanford's Program on Stem Cells in Society as saying much more work needs to be done before the techniques can be used in humans:
"To kind of claim that one study is going to do the trick isn't the way that science works."
Johnson also reported that Arnold Kriegstein of UC San Francisco
"... noted that much of the embryonic stem-cell research going on in California involves examining how to turn cells into treatments. Consequently, he said, the knowledge gained from that will be useful no matter which types of cells - embryonic or reprogrammed - ultimately are determined to be best."
Terri Somers of the San Diego Union-Tribune had this on the impact of the latest research announcement.
"'It's really remarkable work . . . and as big as Dolly (the cloned sheep) in lots of ways,” said Alan Robbins, chief technology officer at Novocell, a San Diego-based stem cell company. 'If it can be translated into humans, then it opens up the way for designer embryonic stem cells.'"
Gautam Naik of the Wall Street Journal also put together an excellent piece with a great deal on the background and implications of the research.

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