Medical Article Essays - Biology, Medicine, Stem Cells, Anatomy

Medical Article Essays - Biology, Medicine, Stem Cells, Anatomy Medical Article December 21, 1999 The Hope, and Hype, of Cord Blood By DENISE GRADY Should parents pay a blood bank to store the blood from their newborn baby's umbilical cord and placenta, in case that child or another family member ever needs it to treat cancer or leukemia? Expectant parents are being urged to do so by companies that have sprung up during the past few years to sell cord-blood banking as a form of biological insurance against such dreaded diseases. The pitch is based on reports in medical journals, such as a major study published last week in the New England Journal of Medicine, showing that cord blood can sometimes be used in place of a bone marrow transplant. Like bone marrow, cord blood is rich in stem cells, which can churn out many different types of cells to rebuild a patient's blood supply and immune system after high doses of radiation and chemotherapy. And a patient's own cord blood, or that from a relative, is more likely than cord blood from an unrelated donor to be a good tissue match and to be accepted by the recipient's body. Some experts in bone-marrow transplantation and blood banking frown on the cord-blood business, arguing that people are being frightened into wasting money on a service they will probably never need. Moreover, private companies are growing in tandem with public banks, and some scientists worry that private banking will limit public access to cord blood. They are concerned because the cord blood in private banks remains the property of the donor family and is not available to patients seeking a compatible donor. But the companies say that however remote the possibility that the blood will be needed, people who choose to bank their own cord blood have a right to do so. In most cases their cord blood would be thrown away in the delivery room if they did not pay to bank it. There are only a few cord-blood banks in the United States, and most hospitals do not have specially trained staff members to collect the blood. Like bone marrow, cord blood must be matched to the recipient by tests for six inherited traits that determine an individual's tissue type. Cord blood does not have to be as precisely matched as bone marrow, but still, the closer the match, the better the odds of success. The weaker the match, the more likely it is that the recipient's body will reject the transplant, or the transplant will attack the recipient's tissues, in a life-threatening reaction called graft versus host disease. The companies that freeze cord blood and bank it point out that a person's own cord blood is a perfect match, and a sibling's cord blood a more likely match than a specimen from a stranger. And so, the argument goes, the best way to protect an entire family from the unthinkable is to save the newborns' cord blood. Promotional literature for one company, Cord Blood Registry, in San Bruno, Calif., emphasizes that people with cancer in the family may have a special interest in cord-blood banking, along with those who have the hardest time finding matches, which includes members of racial minorities, especially families in which the parents are of different races. According to a spokeswoman, Scoti Kaesshaefer, the company reaches parents-to-be by promoting itself to doctors, nurses and childbirth educators, and by leaving information at hospitals. Among the promotional materials the company provided to the New York Times were copies of articles from other newspapers suggesting that cancer among children is on the rise. The company also has a Web site and an 800 number with a recorded greeting that instructs callers to have their credit cards ready. The idea of saving one's own cord blood seems to be catching on. Cord Blood Registry, which describes itself as the largest private cord-blood banking firm in the United States, has stored 10,000 samples during the past three years: 1,500 in 1995, 3,000 in 1996 and 6,000 in 1997. The company charges an initial fee of $1,200 to collect a sample and freeze it, and then $95 a year to keep it stored in liquid nitrogen at the blood bank at the University of Arizona. Customers include people with perfectly healthy children, who just want extra peace of mind, as well as some families who have lost a child to leukemia or another disease and fear for the health of their other children. In its three