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People who are in need of a transplant are more likely to find a match from a donor of the same ethnic descent. There are fewer racial minorities in the national registries, so finding a match can be more difficult.5
Therapies with cord blood have gotten more successful. “The outcomes of cord blood transplants have improved over the past 10 years because researchers and clinicians have learned more about dosing cord blood, picking better matches, and giving the patient better supportive care as they go through the transplant,” says Joanne Kurtzberg, M.D., director of the pediatric bone marrow and stem cell transplant program at Duke University.
Lead image of baby’s umbilical cord from Wikimedia Commons. Possible human blood stem cell image by Rajeev Gupta and George Chennell. Remaining images of blood sample bags and red blood cells from Wellcome Images.
However, cord blood transplants also have limitations. Treatment of adults with cord blood typically requires two units of cord blood to treat one adult. Clinical trials using “double cord blood transplantation” for adults have demonstrated outcomes similar to use of other sources of HSCs, such as bone marrow or mobilized peripheral blood. Current studies are being done to expand a single cord blood unit for use in adults. Cord blood can also only be used to treat blood diseases. No therapies for non-blood-related diseases have yet been developed using HSCs from either cord blood or adult bone marrow.
The stored blood can’t always be used, even if the person develops a disease later on, because if the disease was caused by a genetic mutation, it would also be in the stem cells. Current research says the stored blood may only be useful for 15 years.
There are many “what if” situations that we all consider in our life. One of the most serious is “What if a child or other family member was to become seriously ill?” Cord Blood Banking clinics have been growing exponentially in response to this…
Cord blood collection is a completely painless procedure that does not interfere with the birth or with mother-and-child bonding following the delivery. There is no risk to either the mother or baby. Cord blood collection rarely requires Blood Center staff to be present during the baby’s delivery. There is no cost to you for donating.
There are no hard numbers on a child’s risk of needing a stem-cell transplant: It’s anywhere between one in 1,000 and one in 200,000, according to studies cited by ACOG and the AAP. But private banks’ marketing materials often place the odds at one in 2,700 and note that these numbers don’t factor in its potential future use for diabetes, Alzheimer’s, Parkinson’s disease, and spinal-cord injuries in adults. “Researchers are constantly discovering new treatments using stem cells,” says Gerald Maass, executive vice president of corporate development for Cryo-Cell, a private bank in Clearwater, Florida. Another major bank’s Web site claims incredible odds: “Should cord blood prove successful in treating heart disease, the lifetime probability of being diagnosed with a disease treatable by cord blood will increase from one in 100 to one in two.”
Editor’s Note: This article originally appeared in the Volume 16, Number 1, Spring 2009 issue of Dignitas, the Center’s quarterly publication. Subscriptions to Dignitas are available to CBHD Members. To learn more about the benefits of becoming a member click here.
Most stored cord blood is discarded. At public cord blood banks, a unit of stored cord blood has a greater chance of being used to help a sick child or used toward stem cell research. Private cord blood banks, on the other hand, eventually throw away blood that a family no longer wants to store or use.
Checked to make sure it has enough blood-forming cells for a transplant. (If there are too few cells, the cord blood unit may be used for research to improve the transplant process for future patients or to investigate new therapies using cord blood, or discarded.)
Generally not. The reason siblings are more likely to match is because they get half of their HLA markers from each parent. Based on the way parents pass on genes, there is a 25 percent chance that two siblings will be a whole match, a 50 percent chance they will be a half match, and a 25 percent chance that they will not be a match at all. It is very rare for a parent to be a match with their own child, and even more rare for a grandparent to be a match.
Throughout pregnancy your baby’s umbilical nurtures life. It carries oxygen-rich cells and nutrients from your placenta to your baby and then allows your baby to pump deoxygenated and nutrient-depleted blood back to your placenta. This constant exchange is protected by a special type of tissue that acts like a cushion, preventing twisting and compression to ensure that the cord blood flow remains steady and constant.
When an immediate family member has a disease that requires a stem cell transplant, cord blood from a newborn baby in the family may be the best option. There is a 25% chance, for example, that cord blood will be a perfect match for a sibling, because each child shares one of its two HLA genes with each parent. Occasionally cord blood will be a good match for a parent if, by chance, both parents share some of the six HLA antigens. The baby’s cord blood is less likely to be a good match for more distant relatives. The inventories of unrelated cord blood units in public cord blood banks are more likely to provide appropriate matches for parents and distant relatives, as well as for siblings that do not match.
It would be possible for a healthy child’s cord blood to be used to treat a sibling with leukemia, but the banks’ literature doesn’t spell out that distinction. In the last 10 years, almost all of the approximately 70 cord-blood transplants that have used privately stored blood were given to relatives with preexisting conditions, not to the donors themselves.
Umbilical cord blood is the blood left over in the placenta and in the umbilical cord after the birth of the baby. The cord blood is composed of all the elements found in whole blood. It contains red blood cells, white blood cells, plasma, platelets and is also rich in hematopoietic stem cells. There are several methods for collecting cord blood. The method most commonly used in clinical practice is the “closed technique”, which is similar to standard blood collection techniques. With this method, the technician cannulates the vein of the severed umbilical cord using a needle that is connected to a blood bag, and cord blood flows through the needle into the bag. On average, the closed technique enables collection of about 75 ml of cord blood.
There are around 20 companies in the United States offering public cord blood banking and 34 companies offering private (or family) cord blood banking. Public cord blood banking is completely free (collecting, testing, processing, and storing), but private cord blood banking costs between $1,400 and $2,300 for collecting, testing, and registering, plus between $95 and $125 per year for storing. Both public and private cord blood banks require moms to be tested for various infections (like hepatitis and HIV).
Your baby isn’t the only one who may benefit from having access to preserved newborn stem cells. The cells can potentially be used by siblings and parents, too. In many cord blood treatments, stem cells from a matched family member are preferred.
And as Victor and Tracey Dones learned, a child’s own cord blood can’t always be used to treat him, even when he’s young. “Childhood leukemia is one of the diseases private banks like to play up, but most kids with leukemia are cured with chemotherapy alone. If a transplant is needed, we wouldn’t use a child’s tainted cord blood,” Dr. Kurtzberg says.
There is not one right answer. Your family’s medical history and personal preferences will play a major role in this decision process. However, we can help you make sense of the available options. Continue to follow our guide on cord blood to understand what is the best choice for your family.
While the transplantation of cord blood has its advantages, its main disadvantage is the limited amount of blood contained within a single umbilical cord. Because of this, cord blood is most often transplanted in children. Physicians are currently trying to determine ways that cord blood can be used in larger patients, such as transferring two cord blood units or increasing the number of cells in vitro before transplanting to the patient. It also takes longer for cord blood cells to engraft. This lengthier period means that the patient is at a higher risk for infection until the transplanted cells engraft. Patients also cannot get additional donations from the same donor if the cells do not engraft or if the patient relapses. If this is the case, an additional cord blood unit or an adult donor may be used. While cord blood is screened for a variety of common genetic diseases, rare genetic diseases that manifest after birth may be passed on. The National Cord Blood Program estimates that the risk of transmitting a rare genetic disorder is approximately 1 in 10,000.
Banking cord blood is a new type of medical protection, and there are a lot of questions that parents may want to ask. The Parent’s Guide to Cord Blood organization even has questions it believes all parents should ask their cord blood banks. We have answers to these and other frequently asked cord blood questions in our FAQs. If you can’t find the answer for which you are looking, please feel free to engage one of our cord blood educators through the website’s chat interface.
What’s more, few cord-blood transplants have been given to adults because most units haven’t contained enough stem cells to treat anyone weighing more than 90 pounds, says Joanne Kurtzberg, MD, program director of the division of pediatric blood and marrow transplantation at Duke University Medical Center. And since the procedure is relatively new, no one knows how many years the frozen units will remain viable.
Banking a baby’s blood and stem cells in a cord blood bank is a type of insurance. Ideally, you would not need to access your baby’s stem cells in order to address a medical concern. However, using a cord blood bank can provide peace of mind in knowing that you have a valuable resource if you need it.
To learn more about umbilical cord blood and banking please watch Banking on cord blood, Cord blood – banking and uses, Cord blood transplantation – how stem cells can assist in the treatment of cancer in our video library.
The main reason for this requirement is to give the cord blood bank enough time to complete the enrollment process. For the safety of any person who might receive the cord blood donation, the mother must pass a health history screening. And for ethical reasons, the mother must give informed consent.
When Tracey and Victor Dones’s 4-month-old son was diagnosed with osteopetrosis, a potentially fatal disorder that affects bone formation, the panic-stricken couple was relieved to hear that a stem-cell transplant could save his life. “We’d paid to store Anthony’s umbilical-cord blood in a private bank in case he ever needed it — and I thought we were so smart for having had the foresight to do that,” says Tracey.