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Zemer VS, Mousa K, Herscovici T, Steinberg-Shemer O, Bonstein L, Yacobovich J. Neonatal Thrombocytopenia: Differing Characteristics of NAIT Versus Non-NAIT. J Pediatr Hematol Oncol 2023; 45:e728-e732. [PMID: 37027241 DOI: 10.1097/mph.0000000000002669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 02/23/2023] [Indexed: 04/08/2023]
Abstract
While neonatal alloimmune thrombocytopenia (NAIT) is the most common cause of severe neonatal thrombocytopenia good clinical predictors are lacking. We analyzed cases of neonatal thrombocytopenia in Schneider Children's Medical Center of Israel to pinpoint qualifiers of NAIT (NAIT+) in comparison to non-NAIT (NAIT-) thrombocytopenia. Patient and maternal data were retrospectively collected on all thrombocytopenic newborns undergoing a workup for NAIT in our tertiary center between 2001 and 2016. Among 26 thrombocytopenic neonates, the mean nadir in NAIT+ patients (25×10 9 /L) was significantly lower than NAIT- patients (64×10 9 /L) ( P <0.001). 61.5% of NAIT+ infants required treatment compared with 23% of non-NAIT ( P =0.015). NAIT+ patients also required more therapeutic modalities than infants with NAIT- thrombocytopenia. Human platelet antigen (HPA)-1a and HPA-5b alloantibodies most frequently caused NAIT. In summary, thrombocytopenia in NAIT+ was significantly more severe compared with NAIT- and more likely to require treatment. In addition, despite the varied ethnic population in Israel, the HPA alloantibodies found in our population were most similar to those common in Western countries. In the absence of rigorous prenatal screening options, we suggest platelet counts below 40 to 50×10 9 /L in a healthy newborn be considered most suggestive for NAIT and warrant urgent NAIT-specific analysis.
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Affiliation(s)
- Vered S Zemer
- Clalit Health Services
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv
| | | | - Tina Herscovici
- Departments of Neonatology
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv
| | - Orna Steinberg-Shemer
- Pediatric Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv
| | - Lilach Bonstein
- Blood Bank and Platelet Immunology Laboratories, Rambam Health Care Campus, Haifa, Israel
| | - Joanne Yacobovich
- Pediatric Hematology-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv
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Huang CE, Chen YY, Chang JJ, Wu YY, Chen WM, Wang YH, Chen MC, Lu CH, Shi CS, Chen CC. The Impact of Human Platelet Antigen Allele on Antiplatelet Antibodies and Cryoglobulins in Patients with Primary Immune Thrombocytopenia and Hepatitis C Virus-Associated Immune Thrombocytopenia. Mediterr J Hematol Infect Dis 2023; 15:e2023030. [PMID: 37180208 PMCID: PMC10171212 DOI: 10.4084/mjhid.2023.030] [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: 02/09/2023] [Accepted: 04/20/2023] [Indexed: 05/16/2023] Open
Abstract
Background And Objectives Human platelet antigens (HPAs) are alloantigens associated with antiplatelet alloantibodies and the risk of immune thrombocytopenia (ITP). However, few studies have investigated associations among HPAs, antiplatelet autoantibodies, and cryoglobulins. Methods We enrolled 43 patients with primary ITP, 47 with hepatitis C virus-associated ITP (HCV-ITP), 21 with hepatitis B virus-associated ITP (HBV-ITP), 25 controls with HCV, and 1013 normal controls. We analyzed HPA allele frequencies, including HPA1-6 and 15, antiplatelet antibodies binding to platelet glycoprotein (GP) IIb/IIIa, Ia/IIa, Ib/IX, IV, human leukocyte antigen class I, cryoglobulin IgG/A/M, and their associations with thrombocytopenia. Results In the ITP cohort, HPA2ab, rather than HPA2aa, predicted a low platelet count. HPA2b was associated with the risk of developing ITP. HPA15b was correlated with multiple antiplatelet antibodies. In HCV-ITP patients, HPA3b was correlated with anti-GPIIb/IIIa antibodies. HCV-ITP patients with anti-GPIIb/IIIa antibodies had a higher positive rate of cryoglobulin IgG and IgA compared with those without anti-GPIIb/IIIa antibodies. Overlapping detection was also found among other antiplatelet antibodies and cryoglobulins. Like the antiplatelet antibodies, cryoglobulins were associated with clinical thrombocytopenia, implying their close relationship. Finally, we extracted cryoglobulins to confirm the exhibition of cryoglobulin-like antiplatelet antibodies. In contrast, in primary ITP patients, HPA3b was correlated with cryoglobulin IgG/A/M rather than anti-GPIIb/IIIa antibodies. Conclusion HPA alleles were associated with antiplatelet autoantibodies and had different impacts in primary ITP and HCV-ITP patients. HCV-ITP was considered to be a symptom of mixed cryoglobulinemia in HCV patients. The pathophysiology may differ between these two groups.
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Affiliation(s)
- Cih-En Huang
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yi-Yang Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Jung-Jung Chang
- Division of Cardiology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Yu-Ying Wu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Wei-Ming Chen
- Division of Gastroenterology and Hepatology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Ying-Hsuan Wang
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Min-Chi Chen
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Department of Public Health and Biostatistics Consulting Center, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chang-Hsien Lu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Chung-Sheng Shi
- Division of Urology, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Cheng Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
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Kuroishi A, Takihara Y, Hirayama F. Current understanding and future perspectives for anti-human platelet antigen-15 antibodies in patients with alloimmune thrombocytopenia: History, laboratory testing, and clinical impact. Transfusion 2022; 62:1128-1141. [PMID: 35266549 DOI: 10.1111/trf.16845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 02/02/2022] [Accepted: 02/11/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Ayumu Kuroishi
- Laboratory, Japanese Red Cross Kinki Block Blood Center, Ibaraki-shi, Osaka, Japan
| | | | - Fumiya Hirayama
- Japanese Red Cross Kinki Block Blood Center, Ibaraki-shi, Osaka, Japan
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4
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Next generation sequencing of human platelet antigens for routine clinical investigations and donor screening. Transfus Med Rev 2022; 36:87-96. [DOI: 10.1016/j.tmrv.2022.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/04/2022] [Accepted: 01/06/2022] [Indexed: 11/21/2022]
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Jovanovic Srzentic S, Lilic M, Vavic N, Radovic I, Djilas I. Genotyping of Eight Human Platelet Antigen Systems in Serbian Blood Donors: Foundation for Platelet Apheresis Registry. Transfus Med Hemother 2021; 48:228-233. [PMID: 34539316 DOI: 10.1159/000514487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/11/2021] [Indexed: 11/19/2022] Open
Abstract
Introduction The aim of this study was to investigate the allele and genotype frequencies of 8 human platelet antigen (HPA) systems among blood donors from the Blood Transfusion Institute of Serbia and to compare them with published studies. These data would be useful to establish the basis for a platelet apheresis donor registry. Material and Methods Seventy-two unrelated male platelet apheresis/blood donors from Serbia were typed for 8 HPA systems (HPA-1 to HPA-6, HPA-9, and HPA-15) via the FluoGene method, based on polymerase chain reaction-sequence-specific amplification (PCR-SSP; PCR using sequence-specific primers) with fluorometric signal detection. Allele and genotype frequencies were estimated by direct counting and compared to the expected genotype frequencies according to the Hardy-Weinberg principle. The transfusion mismatch probability was calculated for every HPA specificity. Results The allele frequencies were: HPA-1a, 0.868; HPA-1b, 0.132; HPA-2a, 0.917; HPA-2b, 0.083; HPA-3a, 0.611; HPA-3b, 0.389; HPA-5a, 0.903; HPA-5b, 0.097; HPA-9a, 0.993; HPA-9b, 0.007; HPA-15a, 0.472; and HPA-15b, 0.528. For HPA-4 and HPA-6 only allele a was detected. Discussion The HPA allele frequencies of European populations showed no significant differences in comparison with our results. Statistically significant differences were revealed in comparison with some populations of non-European origin. In the tested donors no HPA-2 bb genotype was detected, but we found 1 donor with the rare HPA-9b allele. The biggest transfusion mismatch probability in the Serbian population is for systems HPA-15 (37.4%) and HPA-3 (36.2%), which means that more than a third of random transfusions could cause mismatch in these systems. This study was enabled by the introduction of molecular HPA typing, and it provides initial results of the HPA allele and genotype frequencies in the population of blood donors in Serbia. They will be used to provide a compatible blood supply on demand for treating patients with alloimmune thrombocytopenic disorders. The successful implementation of PCR-SSP with fluorometric signal detection could be further complemented in the future by the introduction of high-throughput methods, which will largely depend on the available financial resources.
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Affiliation(s)
- Snezana Jovanovic Srzentic
- Department of Prenatal Molecular Testing and Blood Group Typing, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Marko Lilic
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Natasa Vavic
- Department of Donor Apheresis, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Ivana Radovic
- Department of Prenatal Molecular Testing and Blood Group Typing, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Iva Djilas
- Department of Blood Donor Testing, Blood Transfusion Institute of Serbia, Belgrade, Serbia
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Human platelet antigen 1-6, 9 and 15 in the Iranian population: An anthropological genetic analysis. Sci Rep 2020; 10:7442. [PMID: 32366900 PMCID: PMC7198494 DOI: 10.1038/s41598-020-64469-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 04/15/2020] [Indexed: 11/09/2022] Open
Abstract
Human platelet antigens (HPAs) are membranous glycoproteins considered as alloantigens due to their polymorphisms. HPA-incompatibility in multiple pregnancies or blood transfusion can induce the development of alloantibodies leading to thrombocytopenia. The frequency of HPAs varies among populations, so that deep knowledge of HPA frequencies will help us to reduce those incompatibilities. Herein, we studied the allele and genotype frequencies of HPA1-6, HPA9, and HPA15 among the Iranians with intra- and inter-populations analyses on 36 worldwide populations with diverse ethnicities. The analysis shows that the HPA2 and HPA5 have the greatest differences in genotype distribution between the Iranians and other nations, although similar to other populations, the sole allele found in HPA4, 6, and 9 is “a”. Despite other HPAs, the most frequent allele in HPA15 is “b”, which is also abundant in HPA3. Hierarchical clustering indicates the highest degree of global similarity in HPA genotype frequency among Iranian, Argentinian, Brazilian, and German Turkish populations. Our findings can be applied to decrease the risk of alloimmunizations and platelet disorders, especially in neonates.
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Neffati A, Sellami MH, Bellali H, Kâabi H, Chaabene M, Hmida S. [Polymorphism of human platelet antigens in Tunisian population: Clinical and anthropological interests]. Transfus Clin Biol 2019; 26:266-272. [PMID: 30827792 DOI: 10.1016/j.tracli.2019.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 02/04/2019] [Indexed: 01/25/2023]
Abstract
OBJECTIVES Human Platelet Antigens (HPA) are of considerable interest in obstetric transfusion medicine and anthropological genetics. This study aims to provide clinicians with a detailed database of HPA antigenic variants, which allows them to estimate the probability of allo-immunisation of each antigen. In addition, it aims to make an interethnic comparison of the Tunisian population with other populations. METHODS The target population consists of 324 healthy and unrelated Tunisian blood donors recruited from the National Blood Transfusion Center in Tunis. DNA extraction was performed by the Salting Out method and molecular genotyping was performed by the PCR-SSP technique. The statistical analysis was performed using two approaches: manual calculation and computerized calculation. Phylogenetic trees were constructed through the use of Standard Genetic Distances that were calculated from allelic frequencies. RESULTS With the exception of the HPA-4 system, statistical analysis showed that all HPA systems are polymorphic especially the two systems HPA-3 and HPA-15. The inter-ethnic analysis showed that Tunisians are closer to North Africans and Caucasians than Sub-Saharan and Asian populations, which shows genetic mixing between Tunisians, Arabs, Europeans and Africans. CONCLUSION The results of this study could be exploited to prepare a ready-to-use genotyping plate dedicated to HPA antigens, with the aim of ensuring better management, especially for polytransfused patients.
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Affiliation(s)
- A Neffati
- Unité de recherche « immunogénétique, thérapie cellulaire et transfusion sanguine », département d'immuno-hématologie, centre national de transfusion sanguine de Tunis, université de Tunis El Manar, 13, rue Djbel-Lakhdar, 1006 Bab Saadoun, Tunis, Tunisie.
| | - M H Sellami
- Unité de recherche « immunogénétique, thérapie cellulaire et transfusion sanguine », département d'immuno-hématologie, centre national de transfusion sanguine de Tunis, université de Tunis El Manar, 13, rue Djbel-Lakhdar, 1006 Bab Saadoun, Tunis, Tunisie
| | - H Bellali
- Unité de recherche « immunogénétique, thérapie cellulaire et transfusion sanguine », département d'immuno-hématologie, centre national de transfusion sanguine de Tunis, université de Tunis El Manar, 13, rue Djbel-Lakhdar, 1006 Bab Saadoun, Tunis, Tunisie
| | - H Kâabi
- Unité de recherche « immunogénétique, thérapie cellulaire et transfusion sanguine », département d'immuno-hématologie, centre national de transfusion sanguine de Tunis, université de Tunis El Manar, 13, rue Djbel-Lakhdar, 1006 Bab Saadoun, Tunis, Tunisie
| | - M Chaabene
- Unité de recherche « immunogénétique, thérapie cellulaire et transfusion sanguine », département d'immuno-hématologie, centre national de transfusion sanguine de Tunis, université de Tunis El Manar, 13, rue Djbel-Lakhdar, 1006 Bab Saadoun, Tunis, Tunisie
| | - S Hmida
- Unité de recherche « immunogénétique, thérapie cellulaire et transfusion sanguine », département d'immuno-hématologie, centre national de transfusion sanguine de Tunis, université de Tunis El Manar, 13, rue Djbel-Lakhdar, 1006 Bab Saadoun, Tunis, Tunisie
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Hong X, Chen S, Ying Y, Liu Y, Xu X, He J, Zhu F. Simultaneous genotyping of human platelet alloantigen-1 to 28bw systems by multiplex polymerase chain reaction sequence-based typing. Vox Sang 2017; 112:360-366. [PMID: 28370062 DOI: 10.1111/vox.12507] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/11/2017] [Accepted: 01/23/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND OBJECTIVES Human platelet alloantigen (HPA) genotyping is important for the diagnosis and prevention the alloimmune platelet disorders. In this study, a simultaneous genotyping method for HPA-1 to -28bw systems was established using multiplex PCR-SBT and the frequencies of genotypes and alleles of HPA-1 to -28bw systems in the Zhejiang Han population were analysed. MATERIALS AND METHODS The specific primers were designed according to the nucleotide sequences of HPA-1 to 28bw systems which are located in ITGB3, GP1BA, ITGA2B, ITGA2, GP1BB and CD109, respectively. The multiplex PCR amplification systems were used, and then, the amplicons were purified and sequenced. A total of 335 healthy volunteer blood donors were detected. RESULTS The genotypes of ten reference samples from Platelet Immunology Workshop of ISBT were in concordance with the known genotypes. Among the 28 HPA systems, HPA a and b alleles were found in HPA-1 to 6w, HPA-15 and HPA-21w systems in the Chinese Han population, while only HPA aa genotype was detected in the other HPA systems. The frequencies of HPA-1a and HPA-1b were 0·993 and 0·007, with 0·943 and 0·057 for HPA-2a and HPA-2b, 0·527 and 0·473 for HPA-3a and HPA-3b, 0·997 and 0·003 for HPA-4a and HPA-4b, 0·991 and 0·009 for HPA-5a and HPA-5b, 0·980 and 0·020 for HPA-6wa and HPA-6wb, 0·508 and 0·492 for HPA-15a and HPA-15b and 0·994 and 0·006 for HPA-21wa and HPA-21wb. CONCLUSIONS One multiplex PCR-SBT method for HPAs was established and the data of the study could help to prevent and treat for alloimmune thrombocytopenia.
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Affiliation(s)
- X Hong
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
| | - S Chen
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
| | - Y Ying
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
| | - Y Liu
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
| | - X Xu
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
| | - J He
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
| | - F Zhu
- Blood Center of Zhejiang Province, Hangzhou, Zhejiang, China.,Key Laboratory of Blood Safety Research, Ministry of Health, Hangzhou, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Blood Safety Research, Hangzhou, Zhejiang, China
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Wu G, Zhou Y, Li L, Zhong Z, Li H, Li H, Yu M, Shen W, Ni H. Platelet Immunology in China: Research and Clinical Applications. Transfus Med Rev 2017; 31:118-125. [DOI: 10.1016/j.tmrv.2016.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 12/01/2016] [Accepted: 12/01/2016] [Indexed: 12/29/2022]
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Phuangtham R, Romphruk A, Puapairoj C, Leelayuwat C, Romphruk AV. Human platelet antigens in Burmese, Karen and north-eastern Thais. Transfus Med 2016; 27:60-65. [PMID: 27696677 DOI: 10.1111/tme.12362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 06/29/2016] [Accepted: 09/03/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVES A comparative study of allele frequencies at HPA-1 to -6 and HPA-15 in Burmese and Karen populations as well as at HPA-15 in north-eastern Thais (NET) is presented. BACKGROUND Human platelet antigens (HPAs) are clinically important in several immune platelet disorders, including foetal and neonatal alloimmune thrombocytopenia (FNAIT), post-transfusion purpura (PTP) and platelet transfusion refractoriness (PTR). The knowledge of antigen frequencies in a population is essential for the evaluation of patients suffering from immune-mediated platelet disorders. METHODS A total of 285 unrelated, healthy Burmese, 242 Karen and 300 NET were recruited to this study. Genotype and allele frequencies of HPA-1 to -6 and HPA-15 were defined using polymerase chain reaction sequence-specific primers (PCR-SSP) RESULTS: No individuals homozygous for HPA-1bb, -2bb, -4bb, -5bb and -6bb were detected. HPA-1a, -2a, -4a, -5a and -6a were present in all samples of Burmese and Karen origin. HPA-1b, -2b, -4b, -5b and -6b were rare in these populations. The frequencies of HPA-3a/-3b were 60·4/39·6% in Burmese and 55·8/44·2% in Karen, respectively. Frequencies of HPA-15a/-15b were 57·2/42·8% in Burmese, 52·5/47·5% in Karen and 49·8/50·2% in NET. CONCLUSIONS The frequencies of HPA genotypes in our study indicates that HPA-1a, -2a, -4a, -5a and -6a are unlikely involved in FNAIT, PTP and PTR in Burmese and Karen populations. However, HPA-1b, -2b, -3a, -3b, -4b, -5b, -6b, -15a and -15b may likely stimulate alloantibodies in these populations.
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Affiliation(s)
- R Phuangtham
- Biomedical Sciences Program, Graduate School, Khon Kaen University, Khon Kaen, Thailand
| | - A Romphruk
- The Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand.,Department of Clinical Immunology and Transfusion Sciences, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - C Puapairoj
- Blood Transfusion Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - C Leelayuwat
- The Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand.,Department of Clinical Immunology and Transfusion Sciences, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - A V Romphruk
- The Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand.,Blood Transfusion Center, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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