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Saturday, September 24, 2005Up to now, embryonic stem cell advocates have claimed that they are only interested in stem cells harvested from embryos at the blastocyst (or five-to six-day) stage. They have denied any intention of implanting embryos either in the uterus of a volunteer or in an artificial womb in order to harvest cells, tissues, or organs at more advanced stages of embryonic development or in the fetal stage. Advocates are well aware that most Americans, including those who are prepared to countenance the destruction of very early embryos, are not ready to approve the macabre practice of "fetus farming." However, based on the literature I have read and the evasive answers given by spokesmen for the biotechnology industry at meetings of the President's Council on Bioethics, I fear that the long-term goal is indeed to create an industry in harvesting late embryonic and fetal body parts for use in regenerative medicine and organ transplantation. This would explain why some advocates of embryonic stem cell research are not cheering the news about alternative sources of pluripotent stem cells. If their real goal is fetus farming, then the cells produced by alternative methods will not serve their purposes. Why would biomedical scientists be interested in fetus farming? Researchers know that stem cells derived from blastocyst-stage embryos are currently of no therapeutic value and may never actually be used in the treatment of diseases. (In a candid admission, South Korean cloning expert Curie Ahn recently said that developing therapies may take "three to five decades.") In fact, there is not a single embryonic stem cell therapy even in clinical trials. (By contrast, adult and umbilical cord stem cells are already being used in the treatment of 65 diseases.) All informed commentators know that embryonic stem cells cannot be used in therapies because of their tendency to generate dangerous tumors. However, recent studies show that the problem of tumor formation does not exist in cells taken from cows, mice, and other mammals when embryos have been implanted and extracted after several weeks or months of development (i.e. have been gestated to the late embryonic or fetal stage). This means that the real therapeutic potential lies precisely in the practice of fetus farming. Because the developmental process stabilizes cells (which is why we are not all masses of tumors), it is likely true that stem cells, tissues, and organs harvested from human beings at, say, 16 or 18 weeks or later could be used in the treatment of diseases. ....My suspicions and sense of urgency have been heightened by the fact that my home state of New Jersey has passed a bill that specifically authorizes and encourages human cloning for, among other purposes, the harvesting of "cadaveric fetal tissue." A "cadaver," of course, is a dead body. The bodies in question are those of fetuses created by cloning specifically to be gestated and killed as sources of tissues and organs. What the bill envisages and promotes, in other words, is fetus farming. The biotechnology industry put an enormous amount of money into pushing this bill through the New Jersey legislature and is now funding support for similar bills in states around the country. posted by Sydney on 9/24/2005 01:09:00 PM 0 comments 0 Comments: |
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