Scientific Experts Agree:
Embryonic Stem Cells
Are Unnecessary for Medical Progress
New research suggesting that nerve stem cells "can de-differentiate and reinvent themselves" as blood-producing stem cells "means that the need for fetal cells as a source of stem cells for medical research may soon be eclipsed by the more readily available and less controversial adult stem cells."
- D. Josefson, "Adult stem cells may be redefinable," British Medical Journal, 30 Jan. 1999, p. 282
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Commenting on the same findings: "The research shows 'there are alternative strategies' to harvesting stem cells from embryos, said Dr. Ronald McKay, a National Institutes of Health researcher and a pioneer in stem cell studies."
- P. Recer, "Patient's Cells May Grow New Organs," Associated Press, Jan. 21, 1999
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Recent research shows that mesenchymal stem cells in adult bone marrow "can in principle be used to repair bone, cartilage, tendon and many other injured or aged tissues... The cells would be derived in many cases from the patient's own bone marrow and thus present no problem of immune rejection."
- N. Wade, "Discovery Bolsters a Hope for Regeneration,"
New York Times, April 2, 1999, p. A17
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Due to advances in the use of the anti-aging enzyme telomerase, "the ability to rejuvenate specific cells in the body opens up a dazzling array of possibilities. Doctors could grow skin grafts for burn victims using their own skin, insulin-producing cells for diabetics, or muscle tissue for sufferers of muscular dystrophy."
- R. Larson, "Scientists find new life for old cells,"
Washington Times, Dec. 29, 1998, p. A1
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Adult "precursor" or stem cells "may prove much more useful to medical science" than embryonic cells. "Scientists used to think that such potential for cellular regeneration was present only in embryos -- that, for example, humans had made their lifetime supply of brain cells by age 17. But that canon is steadily eroding... 'I think we will find these stem cells in any organ that we look,' says Harvard Medical School researcher Evan Y. Snyder."
- L. Johannes, "Adult Stem Cells Have Advantage Battling Disease,"
Wall Street Journal, April 13, 1999, p. B1
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"This suggests that there is a stem cell in the adult bone marrow that is capable of becoming anything if you give it the right signal."
- Bryon Petersen of University of Pittsburgh Medical Center, quoted in P. Recer, "Cell Used to Make New Liver Tissue," Associated Press, May 13, 1999
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Commenting on new ways to "regenerate" and transplant patients' own brain cells to treat Parkinson's and other diseases: "What we have is a protocol in which we don't have to harvest 12 or 15 fetuses, we don't have to give immunosuppressant therapy, and we don't have to worry about viral disease transmission."
- Michel Levesque, director of neurofunctional surgery at Cedars-Sinai Medical Center in Los Angeles, quoted in M. Moran, "For cell transplants, is one brain better than two?",
American Medical News, May 3, 1999, p. 29
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"For generations, scientific dogma held that the adult brain cannot repair itself, because it lacks stem cells. Wrong. Recently, scientists found that adult brains do indeed harbor stem cells... Since stem cells divide endlessly, a single sample started from a human fetus could provide all that's needed. But the recipient's immune system might attack these as foreign. Perhaps the patient's own body is a better source of stem cells... [Moreover,] brain stem cells may not be a necessary ingredient for custom-making new brain tissue. Scientists believe it may be possible to reprogram more readily available kinds of stem cells, such as the ones that produce skin, so that they will churn out brain cells, instead."
- D. Haney, AP Medical Editor, "Scientists Try to Grow Brain Parts," Associated Press, May 1, 1999