Stem cell therapy & The *Grundrisse*
gonzalo garcia nunez
ggarcianunez at amauta.rcp.net.pe
Sat Oct 5 10:02:58 MDT 1996
el pata es senderista pero lo que importa es el dato sobre el stem cell para
pelear contra el lupus, hay datos utiles.G.
At 18:00 30/09/96 -0400, you wrote:
>1996 has been a seminal year for the development of "stem cells"--the
>mother cells from which all human blood is formed. In February, a US Food
>and Drug Administration (FDA) advisory committee recommended approval for
>Cellpro's stem cell purificaton technique; full approval is expected by the
>end of the year. Stem cell purification techniques developed by Cellpro
>and Baxter, another US company, are already on the market in Europe.
>Stem cells are important for a number of reasons. Because they are capable
>of producing every kind of blood cell--white blood cells, red blood cells,
>platelets, etc.--they guarantee the recipient a fully functioning
>circulatory system. Hundreds of cancer patients, for example, have
>successfully received stem cell transplants, and trials are underway for
>treatment of severe multiple sclerosis at the Medical College of Wisconsin.
>And physicians at the University of Nevada have used fetal stem cell
>transplants to cure several cases of "bubble boy disease"--a condition which
>causes infants to be born with no immune system. There is much real hope
>that stem cell transplants can eventually help cure a host of genetic
>disorders and viral infections such as AIDS.
>Too, since stem cells make the white blood cells after they have been
>placed in a patient, researchers believe they carry less risk of being
>rejected by a recipient's immune system in a donor transplant. That could
>substantially reduce the incidence of deadly graft-versus-host-disease.
>Most importantly, though, stem cells are in a "purer" state than
>later-generation blood cells. They are therefore more likely to be largely
>free of malignancies and other defects. This "purity" forms the basis of
>the most proven use for stem cell transplants to date: to repopulate the
>circulatory systems--including the immune systems--of cancer patients.
>Stem cells can actually restore a cancer patient's immune system after the
>devastating effects of chemotherapy. And findings indicate that leftover
>cancer cells in the blood may play a big role in cancer relapse (breast
>cancer-for which stem cells transplants have most frequently been used-is
>believed to be especially susceptible to lingering blood cell malignancies).
>A number of companies have developed cell selection techniques to isolate
>stem cells. Most-including Baxter, RPR and Gencell-rely on antibodies
>that bind to the cells. Baxter covers the surface of the antibody with
>charged beads and extracts the cells by magnets. Cellpro coats the stem
>cells with a vitamin, then runs the mixture through an egg-white protein
>for which the vitamin has an affinity, while SyStemix uses a high-speed
>laser system to pull out stem cells (they claim the highest rate of
>"purity"--though it is expensive is difficult to use for large batches).
>Stem cell therapy represents the most thorough application to date of
>intense capital penetration into the field of biotechnology. Its payoff,
>judging from these preliminary results looks to be beyond imagination.
>The successful development of this technology will not only of course
>further enhance science's role as an externality of capitalist expansion,
>it will--together with the final dilineation of DNA research--all but
>complete the commodification of life itself. It, too, will usher in
>necessary forms in which labor--as we have heretofore understood it--will
>exist only superfluously.
>As stem cell research progresses into the area of autoimmune diseases such
>as multiple sclerosis, rheumatoid arthritus and lupus, the way will be
>opened--together with more traditional gene therapy--to truly revolutionize
>not only science, but the basic relations of production within this field
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