1
|
Ho JCY, Cheung SKF, Lui Z, Tang IWH, Yang W, Ip P, Lee CK, Middleton D, Kwok JSY. Revisit of Optimal Donor Number Estimation in the Hong Kong Bone Marrow Donor Registry. Front Immunol 2021; 12:638253. [PMID: 33936051 PMCID: PMC8085527 DOI: 10.3389/fimmu.2021.638253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 03/11/2021] [Indexed: 11/28/2022] Open
Abstract
High resolution typing of the HLA-DPB1 locus for patient who requested for hematopoietic stem cell transplantation (HSCT) workup has recently become mandatory by the National Marrow Donor Program (NMDP) in order to facilitate matching between donors and recipients for better outcomes. The likelihood of identifying HLA matched donors in Hong Kong, on top of the existing HLA-A, -B, -C, and -DRB1 loci, is revisited in this study. HLA-A, -B, -C, -DRB1 and -DPB1 genotypes of 5,266 volunteer unrelated Chinese donors from the Hong Kong Bone Marrow Donor Registry (HKBMDR), were included in this study. Matching models were employed to determine the matching probabilities for 10/10(DPB1) and 9/10(DPB1) HLA match. The matching probabilities are 20% at 10/10(DPB1) HLA match and 55% at 9/10(DPB1) match, based on the existing 130,000 donors in the HKBMDR. The likelihoods of match become 27% and 65% respectively, by increasing the registry to 250,000. However, if DPB T-cell-epitope (TCE) model is considered in the matching, the probability will increase to 46% at 10/10 DPB1 permissive mismatching. Our findings provide vital information about the future planning on the targeted recruitment size, HLA typing and search strategies of the donor registry and arose the transplant physicians’ acceptability to 9/10(DBP1) or 10/10(DBP1) HLA match. Nevertheless, the marrow donor registry has planned for increasing the registry size and bringing down the age of recruited donors which will ultimately enhance patient outcome.
Collapse
Affiliation(s)
- Jenny Chung Yee Ho
- Division of Transplantation and Immunogenetics, Queen Mary Hospital, Hong Kong, Hong Kong
| | | | - Zhongyi Lui
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Ivan Wing Hong Tang
- Division of Transplantation and Immunogenetics, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Wanling Yang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Patrick Ip
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Cheuk Kwong Lee
- Hong Kong Red Cross Blood Transfusion Services, Hong Kong, Hong Kong
| | - Derek Middleton
- Transplant Immunology, Royal Liverpool Hospital, Liverpool, United Kingdom
| | - Janette Siu Yin Kwok
- Division of Transplantation and Immunogenetics, Queen Mary Hospital, Hong Kong, Hong Kong
| |
Collapse
|
2
|
Anani WQ, Gottschall J, Denomme GA. Red cell genotyping of rare blood donors: donation behaviour and data visualization. Vox Sang 2021; 116:601-608. [PMID: 33400261 DOI: 10.1111/vox.13047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/27/2020] [Accepted: 11/09/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND The continual identification of rare blood among donors is critical to support national programs like the American Rare Donor Program (ARDP). Some blood centres require consent from donors to be registered with a national registry. This situation provides an opportunity to determine whether a donor's willingness to register is associated with a change in donation behaviour. METHODS Rare donors were identified by molecular typing. The average number of donations per year was compared for each donor prior to and after receiving a consent letter. Donors were categorized as either accepting or declining the request. Non-parametric t tests compared the statistical significance within and between categories. Rare types were overlaid with consensus data to look for trends using data visualization techniques. RESULTS A total of 270 molecularly typed rare donors received letters over 4 years. Half of the donors (132, 49%) agreed to participate in the ARDP. Overall, donation frequency increased after the letter when enrolled. Both Caucasian and non-Caucasian donors increased their donations after enrolling providing an additional 159 red blood cell units over 3 years. Declining participation did not change donation frequency. Data visualization showed that enrolled donors were more affluent, high school and college educated, and lived in their home for longer periods of time. CONCLUSION A donor's willingness to enrol in the ARDP was associated with a post-response increase in donation frequency. New interventions to reach non-Caucasian donors may be a prerequisite to increase donation frequency and a willingness to be a rare blood donor.
Collapse
Affiliation(s)
- Waseem Q Anani
- Diagnostic Laboratories, Versiti, Milwaukee, WI, USA.,Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jerome Gottschall
- Diagnostic Laboratories, Versiti, Milwaukee, WI, USA.,Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA.,Blood Research Institute, Versiti, Milwaukee, WI, USA
| | - Gregory A Denomme
- Diagnostic Laboratories, Versiti, Milwaukee, WI, USA.,Blood Research Institute, Versiti, Milwaukee, WI, USA
| |
Collapse
|
3
|
Schmidt AH, Sauter J, Baier DM, Daiss J, Keller A, Klussmeier A, Mengling T, Rall G, Riethmüller T, Schöfl G, Solloch UV, Torosian T, Means D, Kelly H, Jagannathan L, Paul P, Giani AS, Hildebrand S, Schumacher S, Markert J, Füssel M, Hofmann JA, Schäfer T, Pingel J, Lange V, Schetelig J. Immunogenetics in stem cell donor registry work: The DKMS example (Part 1). Int J Immunogenet 2020; 47:13-23. [PMID: 31903698 PMCID: PMC7003907 DOI: 10.1111/iji.12471] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/06/2019] [Accepted: 12/06/2019] [Indexed: 01/27/2023]
Abstract
Currently, stem cell donor registries include more than 35 million potential donors worldwide to provide HLA-matched stem cell products for patients in need of an unrelated donor transplant. DKMS is a leading stem cell donor registry with more than 9 million donors from Germany, Poland, the United States, the United Kingdom, India and Chile. DKMS donors have donated hematopoietic stem cells more than 80,000 times. Many aspects of donor registry work are closely related to topics from immunogenetics or population genetics. In this two-part review article, we describe, analyse and discuss these areas of donor registry work by using the example of DKMS. Part 1 of the review gives a general overview on DKMS and includes typical donor registry activities with special focus on the HLA system: high-throughput HLA typing of potential stem cell donors, HLA haplotype frequencies and resulting matching probabilities, and donor file optimization with regard to HLA diversity.
Collapse
Affiliation(s)
- Alexander H. Schmidt
- DKMSTübingenGermany
- DKMS Life Science LabDresdenGermany
- DKMSClinical Trials UnitDresdenGermany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Latha Jagannathan
- DKMS BMST Foundation IndiaBangaloreIndia
- Bangalore Medical Services TrustBangaloreIndia
| | | | | | | | | | | | | | | | | | | | | | - Johannes Schetelig
- DKMSClinical Trials UnitDresdenGermany
- University Hospital Carl Gustav CarusMedizinische Klinik IDresdenGermany
| |
Collapse
|
4
|
Human Leukocyte Antigen-A, B, C, DRB1, and DQB1 Allele and Haplotype Frequencies in a Subset of 237 Donors in the South African Bone Marrow Registry. J Immunol Res 2018; 2018:2031571. [PMID: 29850621 PMCID: PMC5937380 DOI: 10.1155/2018/2031571] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 01/30/2018] [Accepted: 04/11/2018] [Indexed: 12/31/2022] Open
Abstract
Human leukocyte antigen- (HLA-) A, HLA-B, HLA-C, HLA-DRB1, and HLA-DQB1 allele and haplotype frequencies were studied in a subset of 237 volunteer bone marrow donors registered at the South African Bone Marrow Registry (SABMR). Hapl-o-Mat software was used to compute allele and haplotype frequencies from individuals typed at various resolutions, with some alleles in multiple allele code (MAC) format. Four hundred and thirty-eight HLA-A, 235 HLA-B, 234 HLA-DRB1, 41 HLA-DQB1, and 29 HLA-C alleles are reported. The most frequent alleles were A∗02:02g (0.096), B∗07:02g (0.082), C∗07:02g (0.180), DQB1∗06:02 (0.157), and DRB1∗15:01 (0.072). The most common haplotype was A∗03:01g~B∗07:02g~C∗07:02g~DQB1∗06:02~DRB1∗15:01 (0.067), which has also been reported in other populations. Deviations from Hardy-Weinberg equilibrium were observed in A, B, and DRB1 loci, with C~DQB1 being the only locus pair in linkage disequilibrium. This study describes allele and haplotype frequencies from a subset of donors registered at SABMR, the only active bone marrow donor registry in Africa. Although the sample size was small, our results form a key resource for future population studies, disease association studies, and donor recruitment strategies.
Collapse
|
5
|
Distribution of HLA-A, -B and -DRB1 antigenic groups and haplotypes from the Brazilian bone marrow donor registry (REDOME). Hum Immunol 2017; 78:602-609. [DOI: 10.1016/j.humimm.2017.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 07/08/2017] [Accepted: 08/08/2017] [Indexed: 11/19/2022]
|
6
|
Kwok J, Guo M, Yang W, Ip P, Chan GC, Ho J, Lee C, Middleton D, Lu L. Estimation of optimal donor number in Bone Marrow Donor Registry: Hong Kong’s experience. Hum Immunol 2017; 78:610-613. [DOI: 10.1016/j.humimm.2017.08.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 07/18/2017] [Accepted: 08/29/2017] [Indexed: 02/07/2023]
|
7
|
van Walraven SM, Brand A, Bakker JNA, Heemskerk MBA, Nillesen S, Bierings MB, Bungener LB, Hepkema BG, Lankester A, van der Meer A, Sintnicolaas K, Somers JAE, Spierings E, Tilanus MGJ, Voorter CEM, Cornelissen JJ, Oudshoorn M. The increase of the global donor inventory is of limited benefit to patients of non-Northwestern European descent. Haematologica 2017; 102:176-183. [PMID: 27561721 PMCID: PMC5210248 DOI: 10.3324/haematol.2016.145730] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 08/22/2016] [Indexed: 11/09/2022] Open
Abstract
Between 2001 and 2012, the number of unrelated donors registered worldwide increased from 7 to 21 million, and the number of public cord blood units increased to over 500,000. We addressed the question of whether this expansion resulted in higher percentages of patients reaching transplantation. Unrelated donor searches were evaluated for 3,124 eligible patients in the Netherlands in two cohorts (2001-2006, n=995; 2007-2012, n=2129), comparing results for patients of Northwestern European and non-Northwestern European origin. Endpoints were 'donor found' and 'transplantation reached'. The substantial growth of the donor inventory over the period studied did not increase the median number of potential unrelated donors (n=7) for non-Northwestern European patients, but almost doubled the number for Northwestern European patients from 42 to 71. Before and after 2007, an unrelated donor or cord blood was identified for 91% and 95%, respectively, of Northwestern European patients and for 65% and 82% of non-Northwestern European patients (P<0.0001). Non-Northwestern European patients more often needed a cord blood transplant. The degree of HLA matching was significantly lower for non-Northwestern European patients (P<0.0006). The time needed to identify a donor decreased for both populations. The percentage of Northwestern European patients reaching transplantation increased from 77% to 83% and for non-Northwestern European patients from 57% to 72% (P=0.0003). The increase of the global inventory resulted in more transplants for patients lacking a family donor, although the quality and quantity of (potential) haematopoietic cell grafts for patients of a non-Northwestern European descent remained inferior, indicating the need for adaptation of recruitment.
Collapse
Affiliation(s)
| | - Anneke Brand
- Sanquin, Amsterdam, the Netherlands
- Leiden University Medical Center, Immunohematology and Blood Transfusion, Leiden
| | | | | | - Suzan Nillesen
- Stem Cell Donor Bank Europdonor Nijmegen, University Medical Center Nijmegen St. Radboud, the Netherlands
| | - Marc B Bierings
- University Medical Center Utrecht / Wilhelmina Kinderziekenhuis, Pediatric Stem Cell Transplantation Team, Leiden, the Netherlands
| | - Laura B Bungener
- University Medical Center Groningen, Laboratory for Transplant Immunology, Leiden, the Netherlands
| | - Bouke G Hepkema
- University Medical Center Groningen, Laboratory for Transplant Immunology, Leiden, the Netherlands
| | - Arjan Lankester
- Leiden University Medical Center, Willem Alexander Kinderziekenhuis, Department for Pediatric Stem Cell Transplantation, Leiden, the Netherlands
| | - Arnold van der Meer
- Stem Cell Donor Bank Europdonor Nijmegen, University Medical Center Nijmegen St. Radboud, the Netherlands
- Radboud University Medical Center, Laboratory Medical Immunology, Nijmegen, the Netherlands
| | - Kees Sintnicolaas
- Sanquin, Department of Transfusion Medicine, Rotterdam, the Netherlands
| | - Judith A E Somers
- Sanquin, Department of Transfusion Medicine, Rotterdam, the Netherlands
| | - Eric Spierings
- University Medical Center Utrecht, Department of Immunology, HLA laboratory, Maastricht, the Netherlands
| | - Marcel G J Tilanus
- University Hospital Maastricht, Transplantation Immunology, Tissue Typing Laboratory, Maastricht, the Netherlands
| | - Christien E M Voorter
- University Hospital Maastricht, Transplantation Immunology, Tissue Typing Laboratory, Maastricht, the Netherlands
| | - Jan J Cornelissen
- Erasmus University Medical Center, Department of Hematology, Rotterdam, the Netherlands
| | - Machteld Oudshoorn
- Europdonor Foundation, Leiden, the Netherlands
- Leiden University Medical Center, Immunohematology and Blood Transfusion, Leiden
| |
Collapse
|
8
|
Gragert L, Eapen M, Williams E, Freeman J, Spellman S, Baitty R, Hartzman R, Rizzo JD, Horowitz M, Confer D, Maiers M. HLA match likelihoods for hematopoietic stem-cell grafts in the U.S. registry. N Engl J Med 2014; 371:339-48. [PMID: 25054717 PMCID: PMC5965695 DOI: 10.1056/nejmsa1311707] [Citation(s) in RCA: 727] [Impact Index Per Article: 72.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Hematopoietic stem-cell transplantation (HSCT) is a potentially lifesaving therapy for several blood cancers and other diseases. For patients without a suitable related HLA-matched donor, unrelated-donor registries of adult volunteers and banked umbilical cord-blood units, such as the Be the Match Registry operated by the National Marrow Donor Program (NMDP), provide potential sources of donors. Our goal in the present study was to measure the likelihood of finding a suitable donor in the U.S. registry. METHODS Using human HLA data from the NMDP donor and cord-blood-unit registry, we built population-based genetic models for 21 U.S. racial and ethnic groups to predict the likelihood of identifying a suitable donor (either an adult donor or a cord-blood unit) for patients in each group. The models incorporated the degree of HLA matching, adult-donor availability (i.e., ability to donate), and cord-blood-unit cell dose. RESULTS Our models indicated that most candidates for HSCT will have a suitable (HLA-matched or minimally mismatched) adult donor. However, many patients will not have an optimal adult donor--that is, a donor who is matched at high resolution at HLA-A, HLA-B, HLA-C, and HLA-DRB1. The likelihood of finding an optimal donor varies among racial and ethnic groups, with the highest probability among whites of European descent, at 75%, and the lowest probability among blacks of South or Central American descent, at 16%. Likelihoods for other groups are intermediate. Few patients will have an optimal cord-blood unit--that is, one matched at the antigen level at HLA-A and HLA-B and matched at high resolution at HLA-DRB1. However, cord-blood units mismatched at one or two HLA loci are available for almost all patients younger than 20 years of age and for more than 80% of patients 20 years of age or older, regardless of racial and ethnic background. CONCLUSIONS Most patients likely to benefit from HSCT will have a donor. Public investment in donor recruitment and cord-blood banks has expanded access to HSCT. (Funded by the Office of Naval Research, Department of the Navy, and the Health Resources and Services Administration, Department of Health and Human Services.).
Collapse
Affiliation(s)
- Loren Gragert
- From the National Marrow Donor Program/Be the Match, Minneapolis (L.G., E.W., J.F., D.C., M.M.); the Center for International Blood and Marrow Transplant Research, Milwaukee and Minneapolis (M.E., S.S., J.D.R., M.H.); and the Blood Stem Cell Transplantation Program, Division of Transplantation, Health Resources and Services Administration (R.B.), and the C.W. Bill Young Marrow Donor Recruitment and Research Program, Department of Defense Marrow Donor Recruitment and Research Program, Bone Marrow Research Directorate, Naval Medical Research Center, Department of the Navy (R.H.) - both in Washington, DC
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Regional HLA differences in Poland and their effect on stem cell donor registry planning. PLoS One 2013; 8:e73835. [PMID: 24069237 PMCID: PMC3772002 DOI: 10.1371/journal.pone.0073835] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 07/23/2013] [Indexed: 01/03/2023] Open
Abstract
Regional HLA frequency differences are of potential relevance for the optimization of stem cell donor recruitment. We analyzed a very large sample (n = 123,749) of registered Polish stem cell donors. Donor figures by 1-digit postal code regions ranged from n = 5,243 (region 9) to n = 19,661 (region 8). Simulations based on region-specific haplotype frequencies showed that donor recruitment in regions 0, 2, 3 and 4 (mainly located in the south-eastern part of Poland) resulted in an above-average increase of matching probabilities for Polish patients. Regions 1, 7, 8, 9 (mainly located in the northern part of Poland) showed an opposite behavior. However, HLA frequency differences between regions were generally small. A strong indication for regionally focused donor recruitment efforts can, therefore, not be derived from our analyses. Results of haplotype frequency estimations showed sample size effects even for sizes between n≈5,000 and n≈20,000. This observation deserves further attention as most published haplotype frequency estimations are based on much smaller samples.
Collapse
|
10
|
High-resolution HLA haplotype frequencies of stem cell donors in Germany with foreign parentage: How can they be used to improve unrelated donor searches? Hum Immunol 2013. [DOI: 10.1016/j.humimm.2012.10.029] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
11
|
Jacquet L, Stephenson E, Collins R, Patel H, Trussler J, Al-Bedaery R, Renwick P, Ogilvie C, Vaughan R, Ilic D. Strategy for the creation of clinical grade hESC line banks that HLA-match a target population. EMBO Mol Med 2012; 5:10-7. [PMID: 23161805 PMCID: PMC3569650 DOI: 10.1002/emmm.201201973] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/04/2012] [Accepted: 10/09/2012] [Indexed: 01/08/2023] Open
Abstract
Here, we describe a pre-derivation embryo haplotyping strategy that we developed in order to maximize the efficiency and minimize the costs of establishing banks of clinical grade hESC lines in which human leukocyte antigen (HLA) haplotypes match a significant proportion of the population. Using whole genome amplification followed by medium resolution HLA typing using PCR amplification with sequence-specific primers (PCR-SSP), we have typed the parents, embryos and hESC lines from three families as well as our eight clinical grade hESC lines and shown that this technical approach is rapid, reliable and accurate. By employing this pre-derivation strategy where, based on HLA match, embryos are selected for a GMP route on day 3-4 of development, we would have drastically reduced our cGMP laboratory running costs.
Collapse
Affiliation(s)
- Laureen Jacquet
- Embryonic Stem Cell Laboratories, Guy's Assisted Conception Unit, Division of Women's Health, King's College School of Medicine, London, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
|
13
|
Harris DM, Hazan-Haley I, Coombes K, Bueso-Ramos C, Liu J, Liu Z, Li P, Ravoori M, Abruzzo L, Han L, Singh S, Sun M, Kundra V, Kurzrock R, Estrov Z. Transformation of human mesenchymal cells and skin fibroblasts into hematopoietic cells. PLoS One 2011; 6:e21250. [PMID: 21731684 PMCID: PMC3120836 DOI: 10.1371/journal.pone.0021250] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 05/25/2011] [Indexed: 01/02/2023] Open
Abstract
Patients with prolonged myelosuppression require frequent platelet and occasional granulocyte transfusions. Multi-donor transfusions induce alloimmunization, thereby increasing morbidity and mortality. Therefore, an autologous or HLA-matched allogeneic source of platelets and granulocytes is needed. To determine whether nonhematopoietic cells can be reprogrammed into hematopoietic cells, human mesenchymal stromal cells (MSCs) and skin fibroblasts were incubated with the demethylating agent 5-azacytidine (Aza) and the growth factors (GF) granulocyte-macrophage colony-stimulating factor and stem cell factor. This treatment transformed MSCs to round, non-adherent cells expressing T-, B-, myeloid-, or stem/progenitor-cell markers. The transformed cells engrafted as hematopoietic cells in bone marrow of immunodeficient mice. DNA methylation and mRNA array analysis suggested that Aza and GF treatment demethylated and activated HOXB genes. Indeed, transfection of MSCs or skin fibroblasts with HOXB4, HOXB5, and HOXB2 genes transformed them into hematopoietic cells. Further studies are needed to determine whether transformed MSCs or skin fibroblasts are suitable for therapy.
Collapse
Affiliation(s)
- David M. Harris
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Inbal Hazan-Haley
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Kevin Coombes
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Carlos Bueso-Ramos
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Jie Liu
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Zhiming Liu
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Ping Li
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Murali Ravoori
- Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Lynne Abruzzo
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Lin Han
- Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Sheela Singh
- Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Michael Sun
- Department of Investigational Cancer Therapeutics, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Vikas Kundra
- Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Razelle Kurzrock
- Department of Investigational Cancer Therapeutics, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Zeev Estrov
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
- * E-mail:
| |
Collapse
|
14
|
Schmidt AH, Solloch UV, Pingel J, Baier D, Böhme I, Dubicka K, Schumacher S, Rutt C, Skotnicki AB, Wachowiak J, Ehninger G. High-resolution human leukocyte antigen allele and haplotype frequencies of the Polish population based on 20,653 stem cell donors. Hum Immunol 2011; 72:558-65. [PMID: 21513754 DOI: 10.1016/j.humimm.2011.03.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 03/11/2011] [Accepted: 03/31/2011] [Indexed: 10/18/2022]
Abstract
We present high-resolution allele and haplotype frequency (HF) estimations of the Polish population based on more than 20,000 registered stem cell donors. Sequencing-based donor human leukocyte antigen (HLA) typing led to unambiguous typing results in most cases (between 94.3% for HLA-DRB1 and 96.9% for HLA-B). HF estimations were carried out with a new, validated implementation of the expectation-maximization algorithm that allowed processing of data with ambiguities. Our results confirm several earlier results, for example, the relative commonness of the haplotype A*25:01 g, B*18:01 g, C*12:03, DRB1*04:01 in the Polish population. Because of the large sample size, we were able to obtain results of unprecedented accuracy. The estimated population-specific HFs were then used to analyze questions of strategic donor registry planning. Simulated matching probabilities by donor file size suggest that there is a need for intense donor recruitment efforts in Poland despite the large German donor registry and the genetic relatedness of both populations. Based on the current German registry size of approximately 4 million donors, the recruitment of 100,000 Polish donors would produce a stronger increase in matching probabilities for Polish patients than the recruitment of 3.3 million additional German donors.
Collapse
|
15
|
Schmidt AH, Solloch UV, Baier D, Stahr A, Wassmuth R, Ehninger G, Rutt C. Regional differences in HLA antigen and haplotype frequency distributions in Germany and their relevance to the optimization of hematopoietic stem cell donor recruitment. ACTA ACUST UNITED AC 2010; 76:362-79. [DOI: 10.1111/j.1399-0039.2010.01520.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
16
|
Abstract
PURPOSE OF REVIEW Since the early 1960s, it was recognized that patients with very complex serology may be limited in the availability of rare blood for transfusion. Over the years, there have been publications about the quest to meet those needs. Although the world's literature on how to find, recruit and maintain rare blood donors is not overwhelming, there are quite a few pearls. This review will seek out those pearls published in 2007-2009 and provides some insight from a perspective of having a responsibility for a nation of patients requiring rare blood for over 15 years. RECENT FINDINGS Most pertinent publications have focused on a particular country and the data gathered by a particular regional area or the national rare donor program. It is clear that the definition of 'rare' varies from country to country. A blood type rare in one country may not be considered rare in another. A few of the publications that will be reviewed are specific to donor recruitment or specific details regarding a particular blood type. Recently, with the advent of semi-automated equipment to assist in DNA analysis, there has been a volley of articles on the use of this equipment.Without effective rare donor programs, there is a risk that transfusion needs may not be met. Hemovigilance concentrates on adverse events related to blood transfusions, and the event that happens when rare blood is not available may be that the patient dies without the transfusion they need. SUMMARY The need for rare blood has been recognized for nearly 50 years, and there are some very effective programs across the world, but not all the areas of the world are equally supplied. The International Society of Blood Transfusion Working Party for Rare Donors is a vital link in the worldwide goal of providing rare blood to the patients who need it.
Collapse
|
17
|
Schmidt AH, Baier D, Solloch UV, Stahr A, Cereb N, Wassmuth R, Ehninger G, Rutt C. Estimation of high-resolution HLA-A, -B, -C, -DRB1 allele and haplotype frequencies based on 8862 German stem cell donors and implications for strategic donor registry planning. Hum Immunol 2009; 70:895-902. [DOI: 10.1016/j.humimm.2009.08.006] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 07/31/2009] [Accepted: 08/10/2009] [Indexed: 01/06/2023]
|
18
|
Abstract
PURPOSE OF REVIEW The present review highlights sentinel work published since 2006 on the definition of the transplantation barrier and the elucidation of cytokine and immune response gene variation in defining posttransplant risks. RECENT FINDINGS Recent work has defined the relative importance of matching for the classical human leukocyte antigen (HLA) HLA-A, HLA-B, HLA-C, DRB1, DQB1 genes, and the importance of additive effects of multilocus disparity. This work provides a new framework for donor identification and extends the use of single locus HLA-DQB1 mismatched donors without compromising the success of the transplant. New data demonstrate that permissible class I mismatches may be defined by donor-recipient mismatching at certain residues. The concept that the extended HLA haplotype carries undetected but functional variation provides an approach for mapping novel transplantation determinants, and a means to further improve the clinical results of transplantation from HLA-matched unrelated donors. Finally, the role of sequence variation in immune response and cytokine genes provides a means for assessing risks for a given transplant recipient and may aid in the planning of the transplant procedure. SUMMARY Optimizing the results of unrelated donor transplantation requires an understanding of risks associated with variation of HLA genes within the major histocompatibility complex, and of genes that participate in the immune response and inflammatory pathways.
Collapse
|
19
|
Schmidt AH, Biesinger L, Baier D, Harf P, Rutt C. Aging of registered stem cell donors: implications for donor recruitment. Bone Marrow Transplant 2007; 41:605-12. [PMID: 18071291 DOI: 10.1038/sj.bmt.1705950] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
With more than 11 million registered stem cell donors worldwide and limited resources for health systems, it seems questionable if investments in ongoing donor recruitment are useful. Since there is evidence that transplant outcomes are better with younger donors, the age distribution of registered donors is highly relevant in this context. One might argue that the usefulness of a donor file decreases if there is no new donor recruitment not only as a result of loss of donors who reach the age limit for donation but also since those donors who remain in the file get older. We established a multivariate model to quantify this effect and to estimate the number (designated R) of donors who must be recruited annually to keep donor file usefulness constant. The model is applied to real data from DKMS German Bone Marrow Donor Center. R exceeds the number of donors who reach the age limit by factors up to 7.3. The model can serve as an easy-to-use tool for strategic donor registry planning. Our results suggest that analyses regarding optimal size of donor registries should also include the age distribution of registered donors.
Collapse
Affiliation(s)
- A H Schmidt
- DKMS German Bone Marrow Donor Center, Tübingen, Germany.
| | | | | | | | | |
Collapse
|