Human tests in experimental pig cell treatment put on hold
A controversial procedure known as xenotransplantation, in which pig cells are transplanted into human Type 1 diabetics, has been put on hold by the International Xenotransplantation Association, which monitors animal to human transplants. The organization there is insufficient evidence that the process is safe for human subjects.
The procedure was developed by prominent Mexican transplant surgeon Dr. Rafael Valdes. It involves removing insulin-producing cells from six-day-old piglets and transplanting them into human subject via a small metal cylinder, called the “Valdes chamber”, that was previously implanted int he subject. The chamber helps to prevent rejection of the donor cells.
Dr. Valdes published results of his procedure last year in the European Journal of Endocrinology. The peer-reviewd study involved twelve teenaged Mexican subjects and concluded that the process is safe and effective, with half the subjects needing less insulin and two patients able to stop receiving insulin shots altogether.
Dr. Valdes also claims that the procedure appears to slow damage to kidneys, nerves and eyes, a common problem for diabetics.
Some researchers have so far been unable to detect the presence of porcine insulin in the lab samples provided by Dr. Valdes and have been unable to reproduce his results in animal subjects.
The National Committee for Bioethics will review the work of Dr. Valdes, who hopes to resume human trials at the end of the year.
(via CTV.ca)
1 opinion for Human tests in experimental pig cell treatment put on hold
Susan
Sep 8, 2006 at 3:19 am
Must the piglets be exactly 6 days old?
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