A cord blood bank is a facility which stores umbilical cord blood for future use. Both private and public cord blood banks have developed in response to the potential for cord blood in treating diseases of the blood and immune systems. Public cord blood banks accept donations to be used for anyone in need, and as such function like public blood banks. Traditionally, public cord blood banking has been more widely accepted by the medical community. Private cord blood banks store cord blood solely for potential use by the donor or donor's family. Private banks typically charge around $2,000 for the collection and around $200 a year for storage.
The policy of the American Academy of Pediatrics states that "private storage of cord blood as 'biological insurance' is unwise" unless there is a family member with a current or potential need to undergo a stem cell transplantation. The American Academy of Pediatrics also notes that the odds of using one's own cord blood is 1 in 200,000 while the Institute of Medicine says that only 14 such procedures have ever been performed. Private storage of one's own cord blood is unlawful in Italy and France, and it is also discouraged in some other European countries. The American Medical Association states "Private banking should be considered in the unusual circumstance when there exists a family predisposition to a condition in which umbilical cord stem cells are therapeutically indicated. However, because of its cost, limited likelihood of use, and inaccessibility to others, private banking should not be recommended to low-risk families." The American Society for Blood and Marrow Transplantation and the American Congress of Obstetricians and Gynecologists also encourage public cord banking and discourage private cord blood banking. Nearly all cord blood transfusions come from public banks, rather than private banks, partly because most treatable conditions can't use one's own cord blood.
Cord blood contains hematopoietic stem cells (which can differentiate only into blood cells), and should not be confused with embryonic stem cells or pluripotent stem cells, which can differentiate into any cell in the body. Cord blood stem cells are blood cell progenitors which can form red blood cells, white blood cells, and platelets. This is why cord blood cells are currently used to treat blood and immune system related genetic diseases, cancers, and blood disorders. On the possibility that cord blood stem cells could be used for other purposes, the World Marrow Donor Association and European Group on Ethics in Science and New Technologies states "The possibility of using one's own cord blood stem cells for regenerative medicine is currently purely hypothetical....It is therefore highly hypothetical that cord blood cells kept for autologous use will be of any value in the future" and "the legitimacy of commercial cord blood banks for autologous use should be questioned as they sell a service which has presently no real use regarding therapeutic options."
Video Cord blood bank
Regulation
In the United States, the Food and Drug Administration regulates cord blood under the category of "Human Cells, Tissues, and Cellular and Tissue Based-Products." The Code of Federal Regulations under which the FDA regulates public and private cord blood banks is Title 21 Section 1271. Several states also require accreditation, including New York, New Jersey, and California. Any company not accredited within those states are not legally permitted to collect cord blood from those states, even if the company is based out of state. Potential clients can check the New York accreditation status from the New York Umbilical Cord Blood Banks Licensed to Collect in New York. Both public and private cord blood banks are also eligible for voluntary accreditation with either the American Association of Blood Banks (AABB) or the Foundation for the Accreditation of Cellular Therapy (FACT). Potential clients can check the current accreditation status of laboratories from the AABB list of accredited cord blood laboratories or the FACT search engine of accredited cord blood banks (on their home page). Other countries also have regulations pertaining to cord blood.
Maps Cord blood bank
Collection and cryopreservation
Cord blood collection happens after the umbilical cord has been cut and is extracted from the fetal end of the cord, diverting up to 75 +/- 23 mL from the neonate. It is usually done within ten minutes of giving birth. Additional stem cells may be collected from the placenta. After the health care provider draws the cord blood from the placental end of the umbilical cord, the placenta is couriered to the stem cell laboratory, where it is processed for additional stem cells. An adequate cord blood collection requires at least 75mL in order to ensure that there will be enough cells to be used for a transplantation. Before the cord blood is stored for later use, it undergoes viral testing, including tests for HIV and Hepatitis B and C, and tissue typing to determine Human Leukocyte Antigen type. It will also be examined for nucleated cell count, cell viability, blood group antigen ABO & Rh blood group system, molecule cluster (CD34), and bacterial and fungal growth.
After the collection, the cord blood unit is shipped to the lab and processed, and then cryopreserved. There are many ways to process a cord blood unit, and there are differing opinions on what the best way is. Some processing methods separate out the red blood cells and remove them, while others keep the red blood cells. However the unit is processed, a cryopreservant is added to the cord blood to allow the cells to survive the cryogenic process. After the unit is slowly cooled to -90 °C, it can then be added to a liquid nitrogen tank which will keep the cord blood unit frozen at -196 °C. The slow freezing process is important to keep the cells alive during the freezing process. There is no consensus yet on optimal procedures for these cord blood cells, although many cryopreservation strategies suggest using dimethyl sulfoxide (DMSO), slow or controlled rate cooling, and rapid thawing.
Cord blood stem cells (though usually from donors) are currently used in the treatment of several life-threatening conditions, mainly blood and immune system related genetic diseases, cancers, and blood disorders. The first clinically documented use of cord blood stem cells was in the successful treatment of a six-year-old boy afflicted by Fanconi anemia in 1988. Since then, cord blood has become increasingly recognized as a source of stem cells that can be used in stem cell therapy. Recent studies have shown that cord blood has unique advantages over traditional bone marrow transplantation, particularly in children, and can be life-saving in rare cases where a suitable bone-marrow donor cannot be found. Cord blood stem cells can also be used for siblings and other members of your family who have a matching tissue type. Siblings have a 25% chance of compatibility, and the cord blood may even be a match for parents (50%) and grandparents.
Public banks
Public cord blood banks function like public blood banks, in that they accept donations from anyone, discard donations that fail to meet various quality control standards, and use national registries to find recipients for their samples. Since patients who need cord blood frequently need more cells than a single collection would have provided, public banks frequently combined multiple samples together when preparing the treatment for a single patient. Unlike bone marrow transplantation, cord blood transplantation doesn't require an exact genetic match, which makes it easier to provide patients samples form unrelated donors. The percentage of public bank donations discarded as medical waste is often cited to be between 60 and 80%. Some of this is due to contamination that occasionally occurs during collection or complications arising from shipping, though this is mostly due to the fact that most cord blood collections fail to collect enough usable cells. Because matches are almost always likely to be better in a public than a private bank, and cord blood from public banks doesn't suffer from the problems it commonly suffers from at private banks (such as potential lower quality control and lower medical usefulness of using a patient's own potentially diseased cord blood), public cord blood banking has been more widely accepted by the medical community. One important obstacle facing public banks is the high cost required to maintain them, which has prevented more than a handful from opening. Because public banks do not charge storage fees, medical centers do not always have the funds required to establish and maintain them.
A recent large study by the journal Pediatrics concluded that almost all cord blood transplants come from public banks:
In the Pediatrics study, transplant specialists who collectively have performed thousands of stem cell transplants for childhood leukemia and other illnesses report that only 50 involved privately banked blood. (Support for public cord-blood banking is widespread in the medical community.) Forty-one cases involved blood used to treat a family member, often a sibling; in 36 of those cases the need for a transplant was known before the cord blood was collected. Only nine cases involved giving cord blood back to the donor, a practice known as autologous transplantation and the chief selling point for private cord-blood banking.
Private banks
Private banking is typically costly to parents and until recently not covered by insurance (e.g. see https://www.stemcellcare.co.uk/). The ability to use the cord blood may also depend on the long-term commercial viability of the enterprise. Accordingly, whether cord blood banking is a worthwhile expenditure for the expectant parent depends in part upon whether the expenditure is offset by the likelihood of ultimately using the cord blood and by the benefits of such use. It is important to ensure the credentials of any potential private bank. In the United States, the Food and Drug Administration regulates cord blood under the category of "Human Cells, Tissues, and Cellular and Tissue Based-Products". Since the FDA considers cord blood stored at public banks to be "drugs", but doesn't consider cord blood stored at private banks for use by the donor to be drugs, private banks are held to a lower regulatory standard.
Cord blood transplants require less stringent matching between the tissue types of the donor and patient, known as their human leukocyte antigen (HLA) types. Bone marrow transplants require a complete match on six key antigens, which are measures of graft-versus-host reaction, known as a 6/6 match. Cord blood transplants achieve the same medical success with only a 4/6 match. HLA type is inherited from both parents, so siblings are particularly likely to be a match, and people from the same ethnic heritage are more likely to match. Minority ethnic groups have difficulty finding a perfectly matched transplant donor. Studies have found that allogeneic transplants have a better outcome when the donor and patient are related. The odds that two siblings will have the 6/6 match required for a bone marrow transplant are 25%. The odds that two siblings will have the 4/6 match required for a cord blood transplant are 39%.
The policy of the Society of Obstetricians and Gynaecologists of Canada (SOGC) supports public cord blood banking (similar to the collection and banking of other blood products, i.e. altruistic, anyone can use it), as well as stating that it should only be considered under certain circumstances. The policy of the American Academy of Pediatrics states that "private storage of cord blood as 'biological insurance' is unwise" unless there is a family member with a current or potential need to undergo a stem cell transplantation. Private storage of one's own cord blood is unlawful in Italy and France, and it is also discouraged in some other European countries.
The American Society for Blood and Marrow Transplantation states that public donation of cord blood is encouraged where possible, the probability of using one's own cord blood is very small, and therefore storage of cord blood for personal use is not recommended, and family member banking (collecting and storing cord blood for a family member) is recommended when there is a sibling with a disease that may be treated successfully with an allogeneic transplant.
Hybrid Cord Blood Banks
Introduction
Umbilical cord blood banking is the act of preserving the stem cells from the umbilical cord blood for a potential future use in a transplant. Expectant parents make an informed decision at the time of birth on either preserving it for exclusively own use in a private bank, or donating it to public bank, or discarding their baby's umbilical cord. However rather than having to choose only one of these options the parents have added choices due to hybrid models which offer more benefits than any individual choice.
Hybrid Cord Blood Banking
Hybrid cord blood banking combines the practices of both public and private banking models. There are a number of hybrid banks around the world different propositions those differ mainly in their sample storage and release strategies and client benefits.
Origin of the concept
Public banks have a limited inventory of donor stem cells to serve the public at large. This poses a challenge to patients in finding a matching unit of stem cells at the crucial time of need. On the other hand, private banks hold huge volumes of stem cells for exclusive use of the families that have subscribed to the service. However, most of the conditions treatable by stem cells require matching stem cells from a donor, thereby making the preserved sample futile.
Hybrid banking combines the aspects of both the private and public mode of banking through strategies such splitting of the collected sample for private use and public donation or by means of sharing of the samples among a closed community or releasing the sample for public use and refunding the client etc.
Today there are 7 cord blood banks that aim to create a large inventory and make an impact by meeting the unmet needs of patients requiring matching stem cells for treatment whilst catering to individual interests of exclusive family use. These banks have adopted varying models of hybrid stem cell banking.
CRYOLIFE
CryoLife was established in 1996. In 1998, CryoLife in Hong Kong offered the CryoMATCH service, whereby parents who participated, received free HLA (human leukocyte antigen) typing service. Their cord blood unit is listed on an international public registry and is released in case it is a match to a patient in need. However, the parents have right of refusal and may keep the cord blood even if it is a match. If the parents release the cord blood to a patient, they will be reimbursed for their costs.
VIRGIN HEALTH BANK
Virgin Health Bank was started with an aim to offer best of both the worlds(private+ public stem cell bank) to meet the needs of the families in the UK. They offer service of 25 years of storage of cord blood banking services in private storage in Family Banking service or public donation in the Community Banking service.
VITA 34
Vita 34 is one of the largest umbilical cord blood banks in Europe and German Speaking countries which has more than 20 years of experience in the stem cell banking . Its not only has an option to store a baby's stem cells privately but also gives parents an option to donate to the public bank thereby creating a larger inventory and increasing the scope for treatment. It will reimburse the fees paid along with interest once the sample has been released for therapy.
IVIDA
IVIDA is a private cord blood bank in Spain, a country in which there are certain limitations to private banking. To parents who choose to preserve their baby's stem cells for private use, IVIDA offers storage at their second facility in Switzerland.
IVIDA sends more than 99% of the collected cord blood samples to their facility in Switzerland for private-only storage. There is still an inventory of some cord blood units which are stored privately in Spain, and are available to the Spanish Transplant Organisation.
Under the national regulations of Spain, any cord blood unit banked within the country must submit compulsory declaration of the HLA (human leukocyte antigen) type on an international registry. Hence, every cord blood unit stored in Spain is listed on the international registry as a potential public unit in case it matches a patient.
MYCORD
CelluGen, a Private Limited Stem Cell Research company started its stem cell banking division Mycord in 2008 in Gurgaon, India. Mycord had introduced the first Private Umbilical Cord Pool Banking concept last year in the country. Mycord Precious Pool Plan(MPPP) allow the baby's family to become members of a combined pool of donor units via its (MPPP).
Mycord advocates that each umbilical cord blood unit privately banked be stored as part of a pool thereby providing an easy access to the best-matched cord blood unit.
Mycord also has an additional feature; Mycord One for One; where if cord blood unit is required by either one of the family members including the child, sibling or parent, instead of depending on the banked cord, parents shall be provided with the best matched cord from those available in the pool
LIFECELL INTERNATIONAL PVT. LTD.
LifeCell which was started in 2004 originally as a private bank, launched BabyCord Share Community Stem Cell Banking in 2017.
LifeCell BabyCord Share - Community Stem Cell Banking allows sharing of preserved umbilical stem cells amongst the community of families that have preserved their baby's stem cells at birth. This allows the members to access a pool of stem cells to find a matching unit during the time of transplants, instead of seeking donor stem cells from public cord blood banks or bone marrow registries. In addition to the child, other siblings of the child, the parents and grandparents too can access this community pool, thus providing a comprehensive family benefit for treatments using stem cells.
Comparison of Benefits Offered By Hybrid Cord Blood Banks
Ownership of cord blood
As of 2007, contracts of the largest cord blood banks do not explicitly state that the cord blood belongs to the donors and child with all the rights and privileges one would reasonably expect from ownership. The ambiguity leaves open future uses not approved by the donors and child. The majority of private cord blood banking facilities, the mother owns all rights to the cord blood that was banked, until the minor in which the cord blood was taken turns eighteen. At that time the minor has all rights to his or her own banked cord blood.
Concerns have been raised that the current interest in cord blood could cause a perception that cord blood is "unused" by the birth process, thus decreasing the amount of blood which is infused into the child as part of the birth process. The pulsation of the cord pushes blood into the child, and it has been recommended that the cord cease pulsation prior to clamping. With the demand for cord blood increasing, there is a possibility that the cord could be clamped prematurely to preserve even more "extra" cord blood. The American Academy of Pediatricians notes: "if cord clamping is done too soon after birth, the infant may be deprived of a placental blood transfusion, resulting in lower blood volume and increased risk for anemia."
Safety and effectiveness
Using one's own cord blood cells might not be wise or effective, especially in cases of childhood cancers and leukemia. Children who develop an immunological disorder often are unable to use their own cord blood for transplant because the blood also contains the same genetic defect.
Additional issues include the possible contamination of the cord blood unit with the same cancer diagnosed later in life; for example, abnormal cells have been detected in filters containing newborn blood of children who were not diagnosed with acute leukemia until the age of 2 to 6 years. The high relapse rates after autologous or syngeneic transplant and the benefit of a graft-vs.-leukemia effect of an allogeneic transplant suggest that autologous cord blood would not be the ideal source of stem cells for patients with leukemia needing a transplant
Confusion with embryonic stem cells
The public in the United States has a general awareness of embryonic stem cells because of the stem cell controversy. However, cord blood stem cells (hematopoietic stem cells) are not embryonic stem cells (pluripotent stem cells).
See also
- Cryo-Cell International
- Stem cell
References
External links
- National Marrow Donor Program
- Parent's Guide to Cord Blood Foundation, a non-profit educational foundation
- Cord Blood Blog
- Treatment of Childhood Apraxia
Source of the article : Wikipedia