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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.
Umbilical cord blood contains a large amount of stem cells. If parents sign up for personalized storage or donation, medical staff will remove stem cells from the umbilical cord and placenta. The blood is then cryogenically frozen, and put into long-term storage.
Banked cord blood is most abundant in white blood cells and stem cells. While a lot of attention is paid to the stem cells, there are approximately 10 times more total nucleated cells (TNCs) than stem cells in any cord blood collection. TNCs are basically white blood cells, or leukocytes; they are the cells of the immune system that protect the body. Despite stem cells comprising one-tenth of most collections, cord blood is still considered a rich source of hematopoietic (he-mah-toe-po-ee-tic) stem cells (HSCs). HSCs are often designated by the marker CD34+. Hematopoietic stem cells can become two categories of cells: myeloid and lymphoid cells. Myeloid cells go on to form your red blood cells, platelets, and other cells of the blood. Lymphoid cells go on to become the B cells and T cells and are the basis for the immune system. Cord blood also contains mesenchymal (meh-sen-ki-mal) stem cells (MSCs), but they are much more abundant in cord tissue, which we will discuss in a minute.
If a mother meets eligibility requirements, and her baby’s cord blood is determined to be suitable for transplant, it’s stored in a public cord blood bank, and the cord blood unit is listed on the Be the Match registry. (Most blood found not suitable for transplant is used for further research.)
Cord blood is one of three sources of blood-regenerating cells used in stem cell transplantation; the other two sources are bone marrow and peripheral blood stem cells. Stem cells have ability to transform themselves into different types of cells that help replace or heal impaired cells such as bone, nerve and blood cells.
However, parents should know that a child’s own cord blood (stored at birth), would rarely be suitable for a transplant today. It could not be used at present to treat genetic diseases, for example, because the cord blood stem cells carry the same affected genes and. if transplanted, would confer the same condition to the recipient. (See the story of Anthony Dones.) In addition, most transplant physicians would not use a child’s own cord blood to treat leukemia. There are two reasons why the child’s own cord blood is not safe as a transplant source. First, in most cases of childhood leukemia, cells carrying the leukemic mutation are already present at birth and can be demonstrated in the cord blood. Thus, pre-leukemic cells may be given back with the transplant, since there is no effective way to remove them (purge) today. Second, in a child with leukemia, the immune system has already failed to prevent leukemia. Since cord blood from the same child re-establishes the child’s own immune system, doctors fear it would have a poor anti-leukemia effect.
A stem cell has the potential to become one of many different types of cells. Stem cells are unique cells: They have the ability to become many different types of cells, and they can replicate rapidly. Stem cells play a huge part in the body’s healing process, and the introduction of new stem cells has always showed great promise in the treatment of many conditions. It wasn’t until we found out where and how to isolate these cells that we started using them for transplants. Although a person’s own stem cells are always 100 percent compatible, there are risks in using someone else’s stem cells, especially if the donor and recipient are not immediately related. The discovery of certain markers allows us to see how compatible a donor’s and host’s cells will be. The relatively recent discovery of stem cells in the umbilical cord’s blood has proven advantageous over acquiring stem cells from other sources. Researchers are currently conducting clinical trials with stem cells, adding to the growing list of 80 diseases which they can treat.
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).
If you do decide to bank your baby’s cord blood, there’s one more thing to keep in mind: It’s best not to make it a last-minute decision. You should coordinate with the bank before your baby is born so nothing is left to chance.
There are usually two fees involved in cord blood banking. The first is the initial fee that covers enrollment, collection, and storage for at least the first year. The second is an annual storage fee. Some facilities vary the initial fee based upon the length of a predetermined period of storage.
If you want the blood stored, after the birth, the doctor clamps the umbilical cord in two places, about 10 inches apart, and cuts the cord, separating mother from baby. Then she inserts a needle and collects at least 40 milliliters of blood from the cord. The blood is sealed in a bag and sent to a lab or cord blood bank for testing and storage. The process only takes a few minutes and is painless for mother and baby.
This is only the beginning. Newborn stem cell research is advancing, and may yield discoveries that could have important benefits for families. CBR’s mission is to support the advancement of newborn stem cell research, with the hope that the investment you are making now will be valuable to your family in the future. CBR offers a high quality newborn stem cell preservation system to protect these precious resources for future possible benefits for your family.
You certainly should, especially if you have a family history of any diseases or conditions that could be treated with cord blood stem cells. Since there is only a 25% chance of a match, you should bank the cord blood of each individual child if you have the means.
^ Roura S, Pujal JM, Gálvez-Montón C, Bayes-Genis A (2015). “Impact of umbilical cord blood-derived mesenchymal stem cells on cardiovascular research”. BioMed Research International. 2015: 975302. doi:10.1155/2015/975302. PMC 4377460 . PMID 25861654.
Then, the cord blood is listed on a national registry. Be The Match is the name of the U.S. registry. This organization also partners with international programs, which means your child’s stem cells could be used to treat a patient on the other side of the world.
Congratulations to the Marepalli family, this week’s winners of a free year of storage! CBR Clients: Enter for a chance to win by tagging a family photo with #CBRFamilyContest! #MyStemCellsLiveAtCBR pic.twitter.com/RLIx54bLqS
CBR is committed to advancing the science of newborn stem cells. We’ve awarded a grant to the Cord Blood Association Foundation to help fund a multi-center clinical trial researching the use of cord blood for children with autism and cerebral palsy. blog.cordblood.com/2018/04/suppor…
A large challenge facing many areas of medical research and treatments is correcting misinformation. Some companies advertise services to parents suggesting they should pay to freeze their child’s cord blood in a blood bank in case it’s needed later in life. Studies show it is highly unlikely that the cord blood will ever be used for their child. However, clinicians strongly support donating cord blood to public blood banks. This greatly helps increase the supply of cord blood to people who need it.
The therapuetic potential of cord blood continues to grow. Over the last few years cord blood use has expanded into an area known as regenerative medicine. Regenerative medicine is the science of living cells being used to potentially regenerate or facilitate the repair of cells damaged by disease, genetics, injury or simply aging. Research is underway with the hope that cord blood stem cells may prove beneficial in young patients facing life-changing medical conditions once thought untreatable – such as autism and cerebral palsy.
Like most transplants, the stem cells must be a genetic match with the patients to be accepted by the body’s immune system. It goes without saying that a patient’s own cord blood will be a 100% match. The second highest chance of a genetic match comes from siblings.
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.
Further advancements were made in 1978, when stem cells were discovered in cord blood and in 1988, when cord blood stem cells were first used in a transplant. Stem cells extracted from the umbilical cord blood or tissue have since been shown to be more advantageous than those extracted from other sources such as bone marrow. In many ways, this is because stem cells from the umbilical cord can be considered naïve and immature compared to stem cells from other sources. Cord stem cells haven’t been exposed to disease or environmental pollutants, and they are more accepting of foreign cells. In this case, inexperience makes them stronger.
To recap, we have certain types of stem cells that can become a variety of different cells—they are like the renaissance men of cells—but there is one more thing that makes stem cells special. This has to do with how they replicate themselves.
The first successful cord blood transplant (CBT) was done in 1988 in a child with Fanconi anemia. Early efforts to use CBT in adults led to mortality rates of about 50%, due somewhat to the procedure being done in very sick people, but perhaps also due to slow development of immune cells from the transplant. By 2013, 30,000 CBT procedures had been performed and banks held about 600,000 units of cord blood.
Scientists first found ways to use stem cells in bone marrow, and following this discovery, the first stem cell transplant was performed in 1956 via bone marrow between identical twins. It resulted in the complete remission of the one twin’s leukemia.
A limitation of cord blood is that it contains fewer HSCs than a bone marrow donation does, meaning adult patients often require two volumes of cord blood for treatments. Researchers are studying ways to expand the number of HSCs from cord blood in labs so that a single cord blood donation could supply enough cells for one or more HSC transplants.
It’s now possible to preserve up to twice the number of stem cells – exclusively available through cord blood banking with Americord®. With Cord Blood 2.0™, you now have the opportunity to treat your child into adolescence and even adulthood. Learn more >
There have been several reports suggesting that cord blood may contain other types of stem cells which can produce specialised cells that do not belong to the blood, such as nerve cells. These findings are highly controversial among scientists and are not widely accepted.
A major limitation of cord blood transplantation is that the blood obtained from a single umbilical cord does not contain as many haematopoeitic stem cells as a bone marrow donation. Scientists believe this is the main reason that treating adult patients with cord blood is so difficult: adults are larger and need more HSCs than children. A transplant containing too few HSCs may fail or could lead to slow formation of new blood in the body in the early days after transplantation. This serious complication has been partially overcome by transplanting blood from two umbilical cords into larger children and adults. Results of clinical trials into double cord blood transplants (in place of bone marrow transplants) have shown the technique to be very successful. Some researchers have also tried to increase the total number of HSCs obtained from each umbilical cord by collecting additional blood from the placenta.