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Barbagallo NBDA, Costa TH, Bastos E, Aravechia MG, Kutner JM, Bonet-Bub C. The relevance of a bank with genotyped platelets donors. Hematol Transfus Cell Ther 2021; 44:465-471. [PMID: 34083156 PMCID: PMC9605892 DOI: 10.1016/j.htct.2021.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/23/2021] [Accepted: 03/13/2021] [Indexed: 11/02/2022] Open
Abstract
OBJECTIVE Describe the clinical and laboratory characteristics and the transfusion strategy of patients at Hospital Israelita Albert Einstein with platelet refractoriness and identify their etiological characteristics. Standardize the platelet immunofluorescence technique by flow cytometry as a test for platelet compatibility in immune platelet refractoriness in transfusion support. METHODS Review of medical records of refractory platelet patients followed at HIAE from January 2011 to May 2017. Clinical-demographic data, laboratory data and identification of the use of compatible genotyped platelets for patients in need of transfusion therapy were collected. The analyzed patients were classified according to the etiology of their platelet refractoriness. To standardize the FC-PIFT technique, blood group O platelets were incubated with serum from blood group AB donors and anti-IgG monoclonal antibody to determine the negative control. In order to verify the influence of the ABO system, monoclonal anti-IgG antibodies were incubated with blood group A or B platelets and with blood group O donor serum with isohemagglutinins below and above 1/64. RESULTS A total of 47 patients were evaluated, a 51% (24/47) preponderance of associated immune and non-immune factors (NIPR + IPR). The most common causes of NIPR + IPR were splenomegaly (54%) and the development of HLA antibodies (88%), consistent with the literature. For patients who required therapeutic transfusion, only a small portion received compatible genotyped platelets. CONCLUSION Although 60% of patients could benefit from the therapeutic transfusion of genotyped platelets, only 10% were actually transfused with this type of blood component. This reaffirms the need for investments in a bank of genotyped platelet donors.
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Affiliation(s)
| | | | - Eduardo Bastos
- Hospital Israelita Albert Einstein (HIAE) São Paulo, SP, Brazil
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Dutra VDF, Bub CB, Costa TH, Santos LD, Bastos EP, Aravechia MG, Kutner JM. Allele and haplotype frequencies of human platelet and leukocyte antigens in platelet donors. EINSTEIN-SAO PAULO 2019; 17:eAO4477. [PMID: 30758400 PMCID: PMC6438674 DOI: 10.31744/einstein_journal/2019ao4477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 09/13/2018] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To described the allele and haplotype frequencies of human leukocyte antigen genes at the -A, -B loci and human platelet antigen genes for human platelet antigen systems 1 to 9, 11 and 15 in blood. METHODS We included 867 healthy unrelated volunteer donors who donated platelets between January 2011 and December 2014. Microarray genotyping was performed using a BeadChip microarray. Medium resolution typing of the human leukocyte antigen at loci A and B was carried out using sequence-specific oligonucleotide probe hybridization. We used multivariate analysis and our human leukocyte antigen population was compared to data from the United States national bone marrow donor program. Human platelet antigen results were compared to a literature review and data from around the world. RESULTS Our human leukocyte antigen haplotype results were more similar to those of hispanics, followed by caucasians. Likewise, our human platelet antigen sample is more similar to those of Argentina, Rio Grande do Sul and Italy. CONCLUSION This was the first article that discusses human platelet antigen and human leukocyte antigen data together. Rare genotypes or antibody associations can make patient management difficult. A blood bank with genotyped donors allows for optimal transfusion and can contribute to better results. Our information can serve as basis for a database of platelet antigen polymorphisms.
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Silva-Malta MCF, de Oliveira LGT, Barreiros LF, do Amaral DR, Martins ML. Human Platelet Antigens in Brazilian Multiethnic Populations: Occurrence of Regional Variation and Frequency in a Large Urban Center (Belo Horizonte). Transfus Med Hemother 2018; 45:388-396. [PMID: 30574056 DOI: 10.1159/000488469] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 03/15/2018] [Indexed: 11/19/2022] Open
Abstract
Background The frequency of human platelet antigens (HPA) varies according to ethnicity, which causes differences in the morbidity of alloimmune and autoimmune thrombocytopenic disorders in different populations. Studies on HPA frequencies in Brazil have reported differences among Brazilian populations produced by the diverse degrees of admixture throughout the country. Methods In the present study, we investigated the variation of HPA distribution in Brazil, compared with worldwide populations, and describe the frequencies of HPA-1, -2, -3, -5, and -15 in a large urban center in Southern Brazil (Belo Horizonte) based on a sample of blood donors. Results The principal component analysis and the dendrogram based on genetic distance revealed a clear relationship between Brazilian populations and the groups formed by European and African populations. The coefficients of variation for HPA allele frequencies suggest that Brazilian populations presented variations for HPA alleles comparable with the populations from continental groups. In Belo Horizonte, the allele a frequencies for HPA-1, -2, -3, -5 and -15 were 0.8575, 0.8400, 0.6225, 0.8525 and 0.5825 respectively. The genotypes with higher frequencies were a/a (72-74%), except for HPA-3 and -15, whose heterozygous a/b genotypes were shown to be more prevalent (43.5 and 44.5%, respectively). Conclusion We confirmed the heterogeneity of HPA antigens in Brazilian populations, reinforcing the importance of HPA panels composed of regional blood donors, or a national panel that contemplates the specificities of the different regions of the country, in order to provide support in platelet transfusions and to minimize the risks associated with HPA alloimmunization. The evaluation of HPA data from Belo Horizonte represents the initial step toward the development of a genotyped platelet donor registry in order to treat HPA alloimmunized patients in this region.
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Affiliation(s)
| | | | - Luísa Ferreira Barreiros
- Serviço de Pesquisa, Fundação Centro de Hematologia e Hemoterapia de Minas Gerais, Fundação Hemominas, Belo Horizonte, Brazil
| | - Dilson Rocha do Amaral
- Setor de Aférese, Hemocentro de Belo Horizonte, Fundação Hemominas, Belo Horizonte, Brazil
| | - Marina Lobato Martins
- Serviço de Pesquisa, Fundação Centro de Hematologia e Hemoterapia de Minas Gerais, Fundação Hemominas, Belo Horizonte, Brazil
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Eyada TK, Amin DG, Samih I, Khedr SM. Human platelet antigen 1, 2 and 5 gene polymorphisms in Egyptians and their potential association with susceptibility to immune thrombocytopenic purpura in Egyptian patients. ACTA ACUST UNITED AC 2017; 23:111-116. [PMID: 28823219 DOI: 10.1080/10245332.2017.1365435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES This study determined the incidence of HPA1, HPA2 and HPA5 polymorphisms in 120 Egyptian immune thrombocytopenic purpura (ITP) patients and 120 healthy Egyptian subjects. METHODS Human platelet antigen (HPA) genotyping was done using the polymerase chain reaction-restriction fragment length polymorphism. RESULTS The frequency of HPA1 allele a and b was 78.75 and 21.25% in controls, 80.8 and 19.2% in ITP, respectively. HPA2 allele a and b frequency was 86.25 and 13.75% in controls and of 74.6 and 25.4% in patients, respectively. HPA5 allele a and b frequency was 87.5 and 12.5% in controls, in patients it was 85 and 15%, respectively. With the exception of HPA2, no other significant difference was encountered in HPA allele frequency between controls and ITP patients. DISCUSSION Egyptian HPA profile is closely linked to Middle East and neighboring Arabs. The current study noted that in all the studied HPA systems 1, 2 and 5, the 'a' allele is more prevalent than the b allele; the most frequent genotype was the homozygous a/a genotype. HPA2b frequency, homo- and hetero-zygous HPA2b genotype frequencies were significantly higher in ITP patients compared to controls. CONCLUSION HPA 2b are 2.37 times more likely to develop ITP compared to those without this allele. The relatively high allele frequency of the HPA-1b in the Egyptian population suggests that this ethnic group has a higher risk of alloimmunization.
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Affiliation(s)
- Tayssir Kamel Eyada
- a Clinical and Chemical Pathology, Faculty of Medicine , Cairo University , Cairo , Egypt
| | - Dalia Gamil Amin
- b Clinical and Chemical Pathology, The BMT Unit, Faculty of Medicine , Cairo University , Cairo , Egypt
| | - Ihab Samih
- c Department of Internal Medicine, Faculty of Medicine , Cairo University , Cairo , Egypt
| | - Salwa Mohamed Khedr
- a Clinical and Chemical Pathology, Faculty of Medicine , Cairo University , Cairo , Egypt
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Castro V. Human platelet antigens and primary immune thrombocytopenia. Rev Bras Hematol Hemoter 2017; 39:95-97. [PMID: 28577662 PMCID: PMC5457466 DOI: 10.1016/j.bjhh.2017.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 02/08/2017] [Indexed: 11/26/2022] Open
Affiliation(s)
- Vagner Castro
- Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
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Silvestre APA, Zacarias JMV, Guelsin GAS, Visentainer JEL, Sell AM. Genetic polymorphisms of human platelet antigens in Euro-African and Japanese descendants from Parana, Southern Brazil. Platelets 2017; 28:607-610. [PMID: 28067110 DOI: 10.1080/09537104.2016.1257785] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The frequency distributions of HPA-1 to HPA-6 and HPA-15 were evaluated in two Brazilian populations from Parana: a mixed population of predominantly Caucasians and a population of Japanese descendants. Genotyping was performed by PCR-SSP in 364 unrelated individuals. Differences in the distribution of HPA highlight diversity in Brazilian miscegenation and the importance of formation of the HPA panel composed of regional blood donors.
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Affiliation(s)
- Ana Paula Avenia Silvestre
- a Post Graduation Program of Biosciences and Physiopathology, Biomedicine and Clinical Analysis Department , Maringa State University , Maringa , Brazil
| | - Joana Maira Valentini Zacarias
- a Post Graduation Program of Biosciences and Physiopathology, Biomedicine and Clinical Analysis Department , Maringa State University , Maringa , Brazil
| | | | - Jeane Eliete Laguila Visentainer
- a Post Graduation Program of Biosciences and Physiopathology, Biomedicine and Clinical Analysis Department , Maringa State University , Maringa , Brazil.,c Basic Health Sciences Department , Maringa State University , Maringa , Brazil
| | - Ana Maria Sell
- a Post Graduation Program of Biosciences and Physiopathology, Biomedicine and Clinical Analysis Department , Maringa State University , Maringa , Brazil
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Portela CN, Schriefer A, Albuquerque SRL, Perdomo RT, Parente AFA, Weber SS. The human platelet alloantigen profile in blood donors from Amazonas, Brazil. Transfus Med 2016; 26:448-456. [DOI: 10.1111/tme.12338] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 05/28/2016] [Accepted: 07/23/2016] [Indexed: 11/29/2022]
Affiliation(s)
- C. N. Portela
- Pós-Graduação em Ciências Aplicadas à Hematologia; Universidade do Estado do Amazonas e Fundação de Hematologia e Hemoterapia do Amazonas; Manaus Brazil
| | - A. Schriefer
- Serviço de Imunologia, Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia; Departamento de Ciências da Biointeração, Instituto de Ciências da Saúde; Instituto de Ciência e Tecnologia em Doenças Tropicais; Salvador Brazil
| | - S. R. L. Albuquerque
- Pós-Graduação em Ciências Aplicadas à Hematologia; Universidade do Estado do Amazonas e Fundação de Hematologia e Hemoterapia do Amazonas; Manaus Brazil
- Laboratório de Imunohematologia Molecular; Fundação de Hematologia e Hemoterapia do Amazonas; Manaus Brazil
| | - R. T. Perdomo
- Centro de Ciências Biológicas e da Saúde; Universidade Federal do Mato Grosso do Sul; Campo Grande Brazil
| | - A. F. A. Parente
- Departamento de Ciências Fisiológicas; Instituto de Ciências Biológicas, Universidade Federal do Amazonas; Manaus Brazil
| | - S. S. Weber
- Instituto de Ciências Exatas e Tecnologia; Universidade Federal do Amazonas; Itacoatiara Brazil
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Al-Ouda SK, Al-Banyan AA, Abdel Gader AGM, Bayoumy NM, Al-Gahtani FH. Gene frequency of human platelet alloantigens-1 to -6 and -15 in Saudi blood donors. Transfus Med 2016; 26:220-4. [PMID: 27019315 DOI: 10.1111/tme.12297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 01/15/2016] [Accepted: 02/27/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Human platelet antigens (HPAs) are involved in the pathogenesis of several clinical conditions, such as platelet transfusion purpura (PTP), refractoriness to platelet transfusion and neonatal alloimmune thrombocytopenia (NAITP). Typing of HPA (1-6 and 15) has not been carried on the Saudi population. This is the first study of all the seven HPA systems on Arabs. The aim of this prospective study was to determine the frequency of HPA (1-6 and 15) in Saudis. STUDY DESIGN AND METHODS A total of 100 randomly selected Saudi blood donor samples were genotyped using the polymerase chain reaction with sequence-specific primers (PCR-SSP). RESULTS The most common HPA genotypes among Saudis were HPA-1 a + b- (75%), HPA-2 a + b- (62%), HPA-3 a + b- (51·5%), HPA-4 a + b- (99%), HPA-5 a + b- (76·5%), HPA-6 a + b- (100%) and HPA-15 a + b + (50%). The prevalent allele among the HPA systems was (a), except in the HPA-15 system where the (b) allele was found in 52% of the subjects. Comparisons with other ethnic populations uncovered marked differences in the distribution of HPA alleles. CONCLUSION Studying the prevalence of HPA antigens in Saudi population will help in the understanding of its role in platelet-related disorders. It will also enable the blood bank to establish an HPA-based donor registry that will be a valuable source of compatible platelet-therapeutic products to alloimmunised patients. This will also enhance the safety and efficacy of platelet transfusion. This data obtained will form an addition to the existing body of literature in transfusion research.
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Affiliation(s)
- S K Al-Ouda
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - A A Al-Banyan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - A G M Abdel Gader
- Department of Basic Medical Science, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - N M Bayoumy
- Department of Physiology, King Saud University, Riyadh, Saudi Arabia
| | - F H Al-Gahtani
- Transfusion Medicine Unit, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
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Merzoni J, Fagundes IS, Lunardi LW, Lindenau JDR, Gil BC, Jobim M, Dias VG, Merzoni L, Sekine L, Onsten TGH, Jobim LF. Human platelet antigen genotyping of platelet donors in southern Brazil. Int J Immunogenet 2015. [PMID: 26211915 DOI: 10.1111/iji.12220] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Merzoni
- PPG em Medicina - Ciências Cirúrgicas; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Serviço de Imunologia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - I. S. Fagundes
- Serviço de Imunologia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - L. W. Lunardi
- PPG em Medicina - Ciências Cirúrgicas; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - J. D.-R. Lindenau
- Departamento de Genética; Instituto de Biociências; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - B. C. Gil
- Serviço de Imunologia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - M. Jobim
- Serviço de Imunologia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - V. G. Dias
- Serviço de Imunologia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - L. Merzoni
- Faculdade de Medicina da UCS; Universidade de Caxias do Sul; Caxias do Sul Brazil
| | - L. Sekine
- Serviço de Hemoterapia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - T. G. H. Onsten
- Serviço de Hemoterapia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - L. F. Jobim
- PPG em Medicina - Ciências Cirúrgicas; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Serviço de Imunologia; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
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10
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Mangerona CMB, Garcia FB, Moraes-Souza H. Frequency of human platelet antigens (HPA)-1, -2, -5 and -15 in Brazilian blood donors and establishment of a panel of HPA-typed donors. Transfus Med 2015; 25:189-94. [PMID: 26033262 DOI: 10.1111/tme.12210] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/08/2015] [Accepted: 05/03/2015] [Indexed: 11/30/2022]
Affiliation(s)
- C. M. B. Mangerona
- Discipline of Hematology and Hemotherapy; Universidade Federal do Triângulo Mineiro
| | - F. B. Garcia
- Discipline of Hematology and Hemotherapy; Universidade Federal do Triângulo Mineiro
- Regional Blood Center of Uberaba; HEMOMINAS Foundation; Uberaba Brazil
| | - H. Moraes-Souza
- Discipline of Hematology and Hemotherapy; Universidade Federal do Triângulo Mineiro
- Regional Blood Center of Uberaba; HEMOMINAS Foundation; Uberaba Brazil
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Bianchi JVDS, de Azevedo MRA, Jens E, Nukui Y, Chamone DAF. Frequency of human platelet antigens in oncohematological patients with thrombocytopenia and the probability of incompatibility to platelet transfusions. Rev Bras Hematol Hemoter 2013; 34:202-5. [PMID: 23049420 PMCID: PMC3459625 DOI: 10.5581/1516-8484.20120050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Accepted: 02/20/2012] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE The objective of this study was to evaluate the frequencies of human platelet antigens in oncohematological patients with thrombocytopenia and to analyze the probability of their incompatibility with platelet transfusions. METHODS Platelet antigen genotyping was performed by sequence-specific primer polymerase chain reaction (SSP-PCR) for the HPA-1a, HPA-1b, HPA-2a, HPA-2b, HPA-3a, HPA-3b, HPA-4a, HPA-4b, HPA-5a, HPA-5b; HPA-15a, HPA-15b alleles in 150 patients of the Hematology Service of the Hospital das Clínicas (FMUSP). RESULTS THE ALLELE FREQUENCIES FOUND WERE: HPA-1a: 0.837; HPA-1b: 0.163; HPA-2a: 0.830; HPA-2b: 0.170; HPA-3a: 0.700; HPA-3b: 0.300; HPA-4a: 1; HPA-4b: 0; HPA-5a: 0.887; HPA-5b: 0.113; HPA-15a: 0.457 and HPA-15b: 0.543. CONCLUSIONS Data from the present study showed that the A allele is more common in the population than the B allele, except for HPA-15. This suggests that patients homozygous for the B allele are more predisposed to present alloimmunization and refractoriness to platelet transfusions by immune causes. Platelet genotyping could be of great value in the diagnosis of alloimmune thrombocytopenia and to provide compatible platelet concentrates for these patients.
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de Paula EV. Comments on: Frequency of human platelet antigens in oncohematological patients with thrombocytopenia and the probability of incompatibility to platelet transfusions. Rev Bras Hematol Hemoter 2013; 34:180-1. [PMID: 23049413 PMCID: PMC3459629 DOI: 10.5581/1516-8484.20120043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 03/15/2012] [Indexed: 12/02/2022] Open
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Conti F, Bertrand G, Dezan M, Costa T, Aravechia M, Mota M, Castilho L, Kaplan C, Kutner J. Molecular HPA genotyping by microarray in Brazilian blood donors. Transfusion 2013; 54:405-11. [DOI: 10.1111/trf.12272] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 03/19/2013] [Accepted: 04/16/2013] [Indexed: 11/29/2022]
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Smaoui M, Hadjkacem B, Ben Amor I, Mnif H, Maalej L, Gargouri A, Gargouri J. Allelic polymorphisms of human platelets-specific alloantigens in South Tunisian population. ACTA ACUST UNITED AC 2013; 18:365-9. [PMID: 23601927 DOI: 10.1179/1607845413y.0000000087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVES Human platelet-specific alloantigens (HPA) are polymorphic epitopes which vary among ethnic groups. BACKGROUND In Tunisia, HPA frequencies were determined in North and centre; however, the pattern of HPA in South Tunisian population is not been studied yet. The aim of this work was to determine allelic frequencies of HPA-1, -3, and -5 systems in south Tunisian population, in order to estimate the risk of anti-platelet allo-immunization and to create a register of HPA-typed blood donors. METHODS Our study concerned 212 unrelated healthy, regular blood donors from southern Tunisia. Allelic polymorphisms of each system were determined using a polymerase chain reaction with sequence-specific primers. RESULTS Genotype frequencies a/a, a/b, and b/b were, respectively, 0.670, 0.288, and 0.042 for HPA-1 system, 0.430, 0.462, and 0.108 for HPA-3 system, and 0.750, 0.241, and 0.009 for HPA-5 system. The allele frequencies were 0.814 and 0.186 for HPA-1a and -1b alleles; 0.660 and 0.340 for HPA-3a and -3b alleles and 0.870, and 0.130 for HPA-5a and -5b alleles. DISCUSSION The reported frequencies are more similar to those of Caucasians than those of north Tunisian population.
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Hauck-Dlimi B, Hammon K, Eckstein R, Ott S, Zimmermann R, Dengler T, Ringwald J. Human platelet antigen genotypes in Turkish and Caucasian blood donors in Germany. ACTA ACUST UNITED AC 2012; 80:214-8. [DOI: 10.1111/j.1399-0039.2012.01908.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 04/13/2012] [Accepted: 05/16/2012] [Indexed: 11/28/2022]
Affiliation(s)
- B. Hauck-Dlimi
- Department of Transfusion Medicine and Hemostaseology; University Hospital Erlangen; Erlangen; Germany
| | - K. Hammon
- Department of Transfusion Medicine and Hemostaseology; University Hospital Erlangen; Erlangen; Germany
| | - R. Eckstein
- Department of Transfusion Medicine and Hemostaseology; University Hospital Erlangen; Erlangen; Germany
| | - S. Ott
- Department of Transfusion Medicine and Hemostaseology; University Hospital Erlangen; Erlangen; Germany
| | - R. Zimmermann
- Department of Transfusion Medicine and Hemostaseology; University Hospital Erlangen; Erlangen; Germany
| | - T. Dengler
- Institute for Transfusion Medicine and Immunohematology; Red Cross Blood donation service Baden-Wuerttemberg-Hessen; Baden-Baden; Germany
| | - J. Ringwald
- Department of Transfusion Medicine and Hemostaseology; University Hospital Erlangen; Erlangen; Germany
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Nie YM, Zhou HJ, Fu YS, Wang CX, Ma JP. The allele frequencies of HPA 1-16 determined by PCR-SSP in Chinese Cantonese donors. Transfus Med 2011; 20:376-82. [PMID: 20667040 DOI: 10.1111/j.1365-3148.2010.01020.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Typing of human platelet antigens (HPA) has proven to be useful in some clinical situations related to platelet alloimmunization. OBJECTIVE The objective of this study was to investigate HPA 1-16 and to determine genotype and allele frequencies by polymerase chain reaction-sequence specific primer (PCR-SSP) in apheresis platelet donors in Guangzhou Blood Center. METHODS A total of 200 random samples from donors were involved in the study. Genotype and allele frequencies of HPA 1 to 16 were detected by PCR-SSP method. RESULTS The frequencies obtained from these donors were 99·50 and 0·50% for HPA-1a and -1b; 96·25 and 3·75% for HPA-2a and -2b; 54·25 and 45·75% for HPA-3a and -3b; 99·50 and 0·50% for HPA-4a and -4b; 99·00 and 1·00% for HPA-5a and -5b; 97·00 and 3·00% for HPA-6a and -6b and 42·25 and 57·75% for HPA-15a and -15b. There is only a/a homozygosis detected in HPA-7, -8, -9, -10, -11, -12, -13, -14 and -16. In this study, none of HPA-1b/ 1b, -2b/2b, -5b/5b homozygosis were detected which were found in other racial groups. One homozygosis of HPA-6b/6b in 200 individuals was detected which was not found in a study involving 1000 Chinese (Feng et al., 2006). CONCLUSION The HPA-3 and -15 appear to the highest priority and HPA-2, -6, -5 -1 and -4 to be the second priority in Chinese Cantonese when it comes to the diagnosis of neonatal alloimmune thrombocytopenia and to provide the HPA-matched platelet for patients with platelet transfusion refractoriness. The PCR-SSP method makes it possible to detect genotype of HPA-1 to -16 in less than 4 h and to establish a donor database for HPA genotype in a blood bank.
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Affiliation(s)
- Y-M Nie
- Institute of Clinical Blood Transfusion, Guangzhou Blood Center Division of Gastrointestinal & Pancreatic Surgery, The First Affiliated Hospital of Sun Yet-sen University, Guangzhou, China
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Martinelli BM, Barjas-Castro ML, Castro V. The frequency of the new platelet antigen Cab in the Brazilian population. Vox Sang 2010; 100:343. [DOI: 10.1111/j.1423-0410.2010.01414.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Nomura ML, Couto E, Martinelli BM, Barjas-Castro ML, Barini R, Passini Júnior R, Castro V. Fetal genotyping for platelets antigens: a precise tool for alloimmune thrombocytopenia: case report and literature review. Arch Gynecol Obstet 2010; 282:573-5. [DOI: 10.1007/s00404-010-1415-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Accepted: 02/18/2010] [Indexed: 10/19/2022]
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19
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Fetal/Neonatal Allo-Immune Thrombocytopenia (FNAIT): Past, Present, and Future. Obstet Gynecol Surv 2008; 63:239-52. [DOI: 10.1097/ogx.0b013e31816412d3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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De La Vega Elena CD, Nogués N, Fernández Montoya A, Chialina S, Blanzaco PD, Theiller E, Raillon MA, Arancegui N, Solis E, Oyonarte S, Crespo Ferrer V, Campos Muñoz A, Muñiz-Díaz E. Human platelet-specific antigens frequencies in the Argentinean population. Transfus Med 2008; 18:83-90. [DOI: 10.1111/j.1365-3148.2007.00819.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Sabbagh AS, Taher AT, Zaatari GS, Mahfouz RAR. Gene frequencies of the HPA-1 platelet antigen alleles in the Lebanese population. Transfus Med 2007; 17:473-8. [DOI: 10.1111/j.1365-3148.2007.00792.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Castro V, Kroll H, Origa AF, Falconi MA, Marques SBD, Marba ST, Passini R, Annichino-Bizzacchi JM, Costa FF, Santoso S, Arruda VR. A prospective study on the prevalence and risk factors for neonatal thrombocytopenia and platelet alloimmunization among 9332 unselected Brazilian newborns. Transfusion 2007; 47:59-66. [PMID: 17207231 DOI: 10.1111/j.1537-2995.2007.01064.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Neonatal thrombocytopenia (NT) occurs in 0.5 to 0.9% of unselected Caucasian newborns. However, the prevalence of this complication in other populations is unknown. In this study the prevalence/causes of NT was determined in Brazilian newborns, a population characterized by admixture among Indigenous, Africans, and Caucasians. STUDY DESIGN A prospective study was carried out in a 3-year period, to determine the prevalence and causes of thrombocytopenia in cord blood samples. Genotyping for HPA 1-5 systems was performed in pairs of mother/neonates with and without thrombocytopenia. All mothers with genotypic mismatches from each group were tested for HPA-specific antibody using the MAIPA technique to identify alloimmunization. RESULTS Platelet counts <100 x 10(9)/L were detected in 1.5% of 9,332 unselected newborns. In 0.15%, platelet count was <50 x 10(9)/L. Clinically significant bleeding was rare. Underlying diseases were present in 48% of the thrombocytopenic cases. HPA 1-5 system genotype mismatches occurred in 50% of gestations, but did not predict the risk for thrombocytopenia. Notably, mismatched genotypes for HPA-5 were slightly increased in the thrombocytopenic group. The presence of anti-HPA-5b antibodies was observed in 0.05% of unselected pregnancies, but increased to 12% among mothers of neonates with thrombocytopenia and mismatched genotype (N = 51). CONCLUSIONS Neonatal thrombocytopenia is common among Brazilian newborns at rates comparable with those described among Caucasians. These data suggest that screening for genotypic HPA mismatch, followed by an HPA-specific immunoassay system, particularly for the HPA-5 system, among mothers of newborns with thrombocytopenia in our population would allow the identification of pregnancies at risk of alloimmune thrombocytopenia.
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Affiliation(s)
- Vagner Castro
- Hematology and Transfusion Center, the Department of Neonatology, State University of Campinas, UNICAMP, Campinas-SP, Brazil.
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Halle L, Bigot A, Mulen-Imandy G, M'Bayo K, Jaeger G, Anani L, Martageix C, Bianchi F, Julien E, Kaplan C. HPA polymorphism in sub-Saharan African populations: Beninese, Cameroonians, Congolese, and Pygmies. ACTA ACUST UNITED AC 2005; 65:295-8. [PMID: 15730528 DOI: 10.1111/j.1399-0039.2005.00360.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The frequency of human platelet antigen-1 (HPA-1) to HPA-11w (excluding HPA-8w) and HPA-15 systems was studied in four sub-Saharan populations: Beninese, Congolese (Democratic Republic of Congo Kinshasa), Cameroonians, and Aka pygmies (Central African Republic). No report of HPA prevalence has previously been published concerning these populations which are characterized by the highest HPA-2b gene frequencies of any reported to date (Aka 0.393, Benin 0.292, Cameroon 0.237, and Congo 0.224) and at lesser degree HPA-5b (Aka 0.405, Congo 0.268, Cameroon 0.254, and Benin 0.182). This study is of great importance (i) particularly in the context of the diversity caused by the population migrations, we may observe today in our hospitals (ii) to confirm that the Pygmy population with distinctive frequencies (absence of the HPA-1b, HPA-2b, and HPA-5b highest frequencies) is an isolated population.
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Affiliation(s)
- L Halle
- Institut National de la Transfusion Sanguine, Paris, France
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Toralles-Pereira C, de M C Pardini MI, Deffune E, Machado PEA. The first report of the human platelet alloantigen 4b allele in a Brazilian. Int J Immunogenet 2005; 32:165-6. [PMID: 15932620 DOI: 10.1111/j.1744-313x.2005.00511.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The human platelet alloantigen (HPA) 4b allele is rarely observed in Caucasians and the observed incidence in Asians is usually lower than 1.0%. We report the first Brazilian with the allele HPA-4b, and were able to determined that he inherited it from his father.
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Affiliation(s)
- C Toralles-Pereira
- Department of Clinical Medicine, UNESP-Sao Paulo State University, Botucatu, Brazil.
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Ozelo MC, Costa DSP, Siqueira LH, Machado TMF, Castro V, Gonçalves MS, Menezes RC, Soares M, Annichino-Bizzacchi JM, Costa FF, Arruda VR. Genetic variability of platelet glycoprotein Ibalpha gene. Am J Hematol 2004; 77:107-16. [PMID: 15389918 DOI: 10.1002/ajh.20148] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Platelet membrane glycoprotein (GP) Ibalpha is a critical component of platelet adhesion complex to subendothelium structures following tissue injury or pathological surfaces, such as atherosclerotic plaques. Polymorphisms of the GPIbalpha gene have been associated with a high risk for occlusive vascular disease, and its distribution varies considerably among distinct populations. These polymorphisms comprise the human platelet antigen (HPA)-2 system, the -5C/T dimorphism of the Kozak sequence, and the variable number of tandem 39-bp repeats (VNTR). Here we report the prevalence of the GPIbalpha gene polymorphisms among Brazilians, a highly ethnically diverse population. We analyzed 492 subjects of European, African, or Indigenous origin. It was possible to determine ten distinct haplotypes. The most common ( reverse similar 40%) haplotype was the Kozak-TT/HPA-2aa/VNTR-CC for both Caucasian and African descent. However, among Indigenous, Kozak-TT/HPA-2aa/VNTR-CC and Kozak-TC/HPA-2aa/VNTR-CC were equally present. Although a strong linkage disequilibrium between VNTR and HPA-2 polymorphism had also been observed, here we determined incomplete linkage disequilibrium in 10% of subjects from all ethnic groups. VNTR-E, a rare variant lacking the 39-bp repeat, was identified in two unrelated subjects, and functional platelet studies revealed no abnormalities. The VNTR-A allele, the largest variant containing four copies of the repeats, was not identified in this population. However, homozygosity for the VNTR-A allele (Kozak-TT/HPA-2aa/VNTR-AA) was determined in two distinct species of nonhuman primates. These results suggest a greater complex evolutionary mechanism in the macroglycoprotein region of the GPIbalpha gene and may be useful in the design of gene-disease association studies for vascular disease.
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Affiliation(s)
- Margareth C Ozelo
- Hematology and Hemotherapy Center, State University of Campinas, Campinas, São Paulo, Brazil
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Castro V, Alberto FL, Costa RNP, Lepikson-Neto J, Gualandro SFM, Figueiredo MS, Annichino-Bizzacchi JM, Saad STO, Costa FF. Polymorphism of the human platelet antigen-5 system is a risk factor for occlusive vascular complications in patients with sickle cell anemia. Vox Sang 2004; 87:118-23. [PMID: 15355504 DOI: 10.1111/j.1423-0410.2004.00536.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Polymorphisms of platelet membrane glycoproteins such as human platelet antigen (HPA)-1b, HPA-2b, the -5T/C Kozak sequence and C807T have been described as risk factors for vascular disease. Vaso-occlusion episodes are a common feature of sickle cell anaemia (SCA), leading to complications such as stroke, acute chest syndrome, avascular head femur necrosis and priapism. Complex interactions are involved in vaso-occlusion, and activated platelets may play an important role. These data raised the question of whether platelet polymorphisms could be implicated in occlusive vascular complications (OVC) of SCA. MATERIALS AND METHODS In this study, 97 patients with SCA were analysed in two groups: 34 patients presenting with OVC (SCA-VC) and 63 without these complications (SCA-N). The distribution of the HPA-1, -2 and -5 systems, as well as C807T dimorphism and -5T/C Kozak sequence alleles, was evaluated using DNA-based methods. RESULTS Patients of the SCA-VC group showed a higher frequency of the HPA-5b allele (0.324) compared with those of the SCA-N group (0.111) (chi2 = 13.19, P = 0.0002). None of the other polymorphisms, isolated or associated as haplotypes, demonstrated any correlation with the development of OVC in these patients. CONCLUSIONS The findings of this study suggest that the HPA-5b allele is a genetic risk factor for the development of OVC in patients with SCA. This allele could be explored as a target for the development of new therapeutic approaches.
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Affiliation(s)
- V Castro
- Hematology and Hemotherapy Center, State University of Campinas-UNICAMP, São Paulo, Brazil.
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Halle L, Bach K H, Martageix C, Bianchi F, Lê T Kim T, Morel-Kopp MC, Soulier J, Tetaria C, Kaplan C. Eleven human platelet systems studied in the Vietnamese and Ma'ohis Polynesian populations. ACTA ACUST UNITED AC 2004; 63:34-40. [PMID: 14651521 DOI: 10.1111/j.1399-0039.2004.00149.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The frequencies of human platelet antigens (HPA) are variable among different ethnic groups. Platelet phenotyping and genotyping in different populations are important to the clinical implications of antiplatelet alloimmunization. No report on HPA prevalence has been published concerning the Vietnamese Kinh and Ma'ohis Polynesian populations. Recent anthropological and genetic marker studies suggest that these two groups have a common origin in East Asia, so we have conducted a combined study concerning the frequency of HPA-1 to HPA-11w systems (excluding HPA-8w) and Gov in these two populations. The results demonstrate a similar pattern of prevalence between Ma'ohis and most of the Asian populations. However, it should be noted that the frequency of HPA-2 is closer to northern Caucasian frequencies than to Asian frequencies. The population of Kinh shows an HPA distribution that is closer to the Chinese population than to the northeastern Thais except for HPA-3, closer to the Indonesian population. Given HPA-3 gene frequency distribution fetomaternal incompatibility could occur more frequently with the risk of alloantibody production.
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Affiliation(s)
- L Halle
- Institut National de la Transfusion Sanguine (INTS), Laboratoire d'Immunologie Plaquettaire, Paris, France
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Rozman P. Platelet antigens. The role of human platelet alloantigens (HPA) in blood transfusion and transplantation. Transpl Immunol 2002; 10:165-81. [PMID: 12216947 DOI: 10.1016/s0966-3274(02)00063-1] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review, we describe the platelet surface molecules with special focus on the polymorphic glycoproteins giving rise to the human platelet alloantigen (HPA) system. We list the platelet glycoprotein complexes GPIa/IIa, GPIIb/IIIa, GPIb/V/IX and some other molecules, the corresponding genes that encode them and we describe their polymorphisms as well as their physiological function. Based on data obtained by serological and molecular methods, we explain how ancestral HPA alloepitopes have developed into the modern variants. We also describe the tissue distribution of these proteins, which seems to be wider than thought initially, and discuss the significance of the HPA encoding genes distribution in various populations. Methods for their determination are then described briefly Since HPA alloepitopes can induce antibodies with resulting clinical conditions such as: post-transfusion refractoriness to platelets (PTR); post-transfusion thrombocytopenic purpura (PTTP); and fetomaternal alloimmune thrombocytopenia (FMAIT), the mechanism of this alloimmunization and its prevention is described. Although the humoral arm is more important from the clinical viewpoint, the activation of the cytotoxic arm by HPA alloepitopes is also possible. These polymorphisms also seem to have a role in certain other clinical circumstances, therefore their impact on cardiovascular diseases and haemostatic disorders as well as their role in the transplantation of solid organs and bone marrow is addressed. We conclude that during the last decades, the research of the platelet membrane molecules contributed considerably to the diagnostics, prevention and therapy of the blood coagulation and haemostatic disorders, to the management of the neonatal thrombocytopenias, transfusion-related thrombocytopenias, refractoriness to platelet transfusions and autoimmune disorders. It also changed our view on the role of HPA alloepitopes in bone marrow and solid organ transplantation. In the future, this accumulated knowledge will be useful for the development of the cell-based therapies and immune modulation of both acquired and hereditary diseases.
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Affiliation(s)
- Primoz Rozman
- Blood Transfusion Centre of Slovenia, Department of Immunohematology, Ljubljana
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