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Hassan SN, Mohamad S, Kannan TP, Hassan R, Wei S, Wan Ab Rahman WS. Prevalence of GP. Mur variant phenotype among Malaysian blood donors. Asian J Transfus Sci 2023; 17:169-174. [PMID: 38274953 PMCID: PMC10807541 DOI: 10.4103/ajts.ajts_125_21] [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: 08/31/2021] [Revised: 09/27/2021] [Accepted: 10/10/2021] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND AND OBJECTIVE A number of glycophorin variant phenotypes or hybrid glycophorin variants of the MNS blood group system bear multiple immunogenic antigens such as Mia, Mur, and MUT. In the East and Southeast Asian populations, glycoprotein (GP.) Mur is the most common glycophorin variant phenotype expressing those three immunogens. The aim of this study was to detect MNS system glycophorin variant phenotypes (GP. Mur, GP. Hop, GP. Bun, GP. HF, and GP. Hut) among Malaysian blood donors. MATERIALS AND METHODS In this cross-sectional study, 144 blood donors were selected under stratified random sampling. The deoxyribonucleic acid was extracted from whole blood samples, followed by a polymerase chain reaction assay. Sanger sequencing was used to identify the specific MNS variants and then validated by a serological crossmatch with known anti-Mur and anti-MUT. RESULTS GP. Mur was identified among Malaysian blood donors with a prevalence of 6.94%, and no other variants of the MNS system were found. CONCLUSION The present study substantiates that GP. Mur is the main variant of the MNS system glycophorin (B-A-B) hybrid in Malaysian blood donors. GP. Mur-negative red blood cells must therefore be considered in the current transfusion policy in order to prevent alloimmunization and immune-mediated transfusion reactions, particularly in transfusion-dependent patients.
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Affiliation(s)
| | - Suharni Mohamad
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Thirumulu Ponnuraj Kannan
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
- Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Rosline Hassan
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - ShuangShi Wei
- CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, China
| | - Wan Suriana Wan Ab Rahman
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
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Liang Y, Ren J, Zhong F, Hong W, Su Y, Wu F, Liang S, Liu J, Fang S, Liang Y, Fan X, Lin J, Liu Y, Feng B, Xu Y. Characterization of alternatively spliced transcript variants of glycophorin A and glycophorin B genes in Chinese blood donors. Vox Sang 2022; 117:715-723. [PMID: 35138639 DOI: 10.1111/vox.13252] [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: 09/06/2021] [Revised: 11/25/2021] [Accepted: 12/23/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVES The molecular basis of MNS blood group variants is not fully clear yet. In this study, we have characterized mRNA variants of GYPA and GYPB genes to reveal whether alternative RNA splicing may cause antigenic diversity of the MNS system. MATERIALS AND METHODS Total RNA was extracted from peripheral blood of Chinese blood donors and full-length cDNA products were generated. A nested polymerase chain reaction (PCR)-based method was established for fragment amplification and Sanger sequencing. Resulted full-length mRNA sequences were aligned with GYPA or GYPB genomic sequences respectively for exon identification. Amino acid (AA) sequences of GPA and GPB proteins were extrapolated and GYPA-EGFP, GYPB-EGFP fusion genes were generated to monitor subcellular distribution of the encoded glycophorin (GP) proteins. RESULTS Totally 10 blood samples were analysed. GYPB mRNAs of all the subjects demonstrated frequent exon insertion or deletion whereas this kind of variation was only observed in 3 of 10 GYPA mRNA samples. None of the reported Miltenberger hybrids was detected in any of the mRNA samples. The alternative splicing resulted in changes of AA sequences in N-terminal domains where the MNS antigenic motifs resided; however, subcellular localizations of GP-EGFP fusion proteins showed that the above-mentioned AA changes did not affect cell surface distribution of the encoded GP proteins. CONCLUSIONS Alternative RNA splicing may influence the antigenic features of GP proteins but not their cell surface distribution. Therefore, GYPA and GYPB mRNA characterization might be an invaluable supplement to serological phenotyping and DNA-based genotyping in MNS blood grouping.
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Affiliation(s)
- Yanlian Liang
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Jianwei Ren
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science & Innovation, Chinese Academy of Sciences, Hong Kong, People's Republic of China.,R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Fuling Zhong
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Wenxu Hong
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Yuqing Su
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Fan Wu
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Shuang Liang
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
| | - Jun Liu
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Shuanghua Fang
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Yanwen Liang
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Xiuchu Fan
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Jiansuo Lin
- R&D Division, Shenzhen Ritzcon Biological Technology Co., Ltd., Shenzhen, People's Republic of China
| | - Yi Liu
- Guangdong Key Laboratory for Research and Development of Natural Drugs, Department of Pharmacology, Marine Medicine Research Institute, Guangdong Medical University, Zhanjiang, People's Republic of China
| | - Bo Feng
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Yunping Xu
- Shenzhen Blood Centre, Shenzhen Institute of Transfusion Medicine, Shenzhen, People's Republic of China
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Yang MH, Chen JW, Wei ST, Hou SM, Chen YJ. The efficacy of ethnic specific blood groups genotyping for routine donor investigation and rare donor identification in Taiwan. Vox Sang 2021; 117:99-108. [PMID: 34159602 DOI: 10.1111/vox.13133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 04/16/2021] [Accepted: 05/02/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Large-scale single nucleotide variation (SNV)-based blood group genotyping assays have been made available for over a decade. Due to differences in ethnic groups, there is much diversity in clinically important blood group antigens and genetic variants. Here, we developed a robust matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF)-based blood group genotyping method on MassARRAY system. STUDY DESIGN AND METHODS A total of 1428 donors were enrolled into three groups: (a) reagent red cell donors; (b) rare donor or common antigen-negative donors; and (c) group O, R1 R1 /R2 R2 donors. Forty-two SNVs were designed for determining nine blood groups, with X/Y chromosome in two multiplex reactions, on MassARRAY 96-well format system. Further targeted sequence analyses were performed by Sanger sequencing. RESULTS WHO reference reagent (NIBSC code: 11/214) was tested for concordance with the provided genotype results. Among the donors, concordance rate was over 99%. Alleles of important phenotypes such as Mi(a+), Di(a+), and Asian-type DEL and alleles of rare blood groups such as Fy(a-), Jk(a-b-) and s- were screened. Three types of discrepancies were found. Serologically, the 'N' antigen was expressed on genetically MM with GYP*Mur red blood cells and caused genuine discrepancies (9.5%). Genetically, allele dropout (ADO) was caused by rare SNV in the primer for Ss genotype (2.1%) and partial insertion of RHD genes (0.9%) led to difficulties in predicting phenotypes. CONCLUSION Hemo panel module and MassARRAY System in 96-well format showed good performance in terms of large-scale blood group genotyping and phenotype predictions. Implementation of this method is effective for routine blood group genotype screening of donors.
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Affiliation(s)
- Meng-Hua Yang
- Head Office, Taiwan Blood Services Foundation, Taipei, Taiwan.,Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jen-Wei Chen
- Head Office, Taiwan Blood Services Foundation, Taipei, Taiwan
| | - Sheng-Tang Wei
- Head Office, Taiwan Blood Services Foundation, Taipei, Taiwan
| | - Sheng-Mou Hou
- Head Office, Taiwan Blood Services Foundation, Taipei, Taiwan.,Department of Orthopedic Surgery, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Yann-Jang Chen
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, Taiwan.,Department of Pediatrics, Taipei Veteran General Hospital, Taipei, Taiwan.,Department of Education and Research, Taipei City Hospital, Taipei, Taiwan
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Wei L, Sun A, Wen J, Wang Z, Li Q, Liao Y, Luo G, Ji Y. Molecular genetic analysis of Mi a -positive hybrid glycophorins revealed two novel alleles of GP.Vw and multiple variant transcripts of GYPB existing in both the homozygous GP.Mur and wild-type GPB individuals. Transfusion 2021; 61:2477-2486. [PMID: 34117642 DOI: 10.1111/trf.16450] [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: 10/18/2020] [Revised: 03/16/2021] [Accepted: 04/28/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND The hybrid glycophorins of MNS blood group system express a series of low incidence antigens including Mia , which are commonly found in Southeast Asian populations. In this study, the molecular basis of Mia -positive hybrid glycophorins was firstly clarified in the Chinese Southern Han population. RNA transcripts of GYPB gene in the homozygous GP.Mur individuals were also analyzed. STUDY DESIGN AND METHODS DNAs were extracted from the whole blood samples of 111 Mia -positive donors. Then, high-resolution melting (HRM) analysis for GYP(B-A-B) was used to analyze the genotypes. Sequencing of GYPB pseudoexon 3 was conducted in the samples with variant melting curves. TA-cloning and subsequent sequencing of GYPA exons 2-4 were performed in the Mia -positive samples with normal GYPB/GYPB genotype by HRM. The transcript analysis of GYPB was conducted in homozygous GP.Mur and wild-type glycophorin B (GPB) individuals using RNA extracted from the cultured erythroblast. RESULTS The heterozygous GYP*Mur/GYPB (n = 101), homozygous GYP*Mur/GYP*Mur (n = 7) including one novel GYP*Mur allele with an extra GYPA/GYPE specific nucleotide substitution (c.229+110A>T), heterozygous GYP*Bun/GYPB (n = 1) and GYP*Vw/GYPA (n = 2) with two novel GYP*Vw alleles were identified. RNA transcript analysis revealed multiple transcripts of GYPB existing in both homozygous GP.Mur and normal GPB individuals. CONCLUSION The results showed the genetic diversity of hybrid glycophorins in the Chinese population. Besides, the successful analysis of GYPB transcripts indicates that the cultured erythroblast is a good source for RNA transcript analysis for the protein only expressed on the red blood cells.
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Affiliation(s)
- Ling Wei
- Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, People's Republic of China
| | - Ainong Sun
- Department of Laboratory Medicine, Zhongshan Blood Center, Zhongshan, People's Republic of China
| | - Jizhi Wen
- Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, People's Republic of China
| | - Zhen Wang
- Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, People's Republic of China
| | - Qiao Li
- Department of Laboratory Medicine, Zhongshan Blood Center, Zhongshan, People's Republic of China
| | - Yanting Liao
- Department of Laboratory Medicine, Zhongshan Blood Center, Zhongshan, People's Republic of China
| | - Guangping Luo
- Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, People's Republic of China
| | - Yanli Ji
- Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, People's Republic of China
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Universal Detection of Mi a Antigen and Frequencies of Glycophorin Hybrids among Blood Donors in Taiwan by Human Monoclonal Antibodies against Mi a (MNS7), Mur (MNS10), and MUT (MNS35) Antigens. Diagnostics (Basel) 2021; 11:diagnostics11050806. [PMID: 33946749 PMCID: PMC8146793 DOI: 10.3390/diagnostics11050806] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 04/24/2021] [Accepted: 04/25/2021] [Indexed: 02/02/2023] Open
Abstract
Glycophorin hybrids such as GP.Mur are common in Southeast Asians. In Taiwan, clinically significant alloantibodies to the GP.Mur phenotype are the most important issue in blood banks. A large-scale screening of glycophorin hybrids in the Taiwanese population is urgently needed to ensure transfusion safety. Four clones of human hybridomas that secrete anti-Mia, anti-MUT, and anti-Mur were established by fusing human B-lymphocytes and myeloma cells (JMS-3). The specificity of each monoclonal antibody (MoAb) was characterized. Three MoAbs were applied on an Automated Pretransfusion Blood Testing Analyzer (PK7300/PK7400) for donor screening. Genotyping was performed to determine the detailed subgrouping of glycophorin hybrids. Four MoAbs are IgM antibodies. Anti-Mia (377T) binds to 46DXHKRDTYA54, 48HKRDTYAAHT57 peptides, and anti-Mia (367T) binds to 43QTNDXHKRD51 peptides (X indicates T, M, or K). Anti-Mur is reactive with 49KRDTYPAHTA58 peptides. Anti-MUT is reactive with 47KHKRDTYA54. A total of 78,327 donors were screened using three MoAbs, and 3690 (4.71%) were GP.Mur, 20 (0.025%) were GP.Hut, and 18 (0.022%) were GP.Vw. When the Mia antigen was introduced as routine screening, the frequency of Mi(a+) among blood donors in Taiwan was 4.66% (67,348/1,444,541). Mia antigen was implemented as a routine blood testing, and the results were labeled on all red blood cell (RBC) units.
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Successful prenatal management of two foetuses affected by antibodies against GP.Mur with prenatal genotyping analysis and a literature review. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2020; 19:135-143. [PMID: 33085590 DOI: 10.2450/2020.0058-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 06/30/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUND GP.Mur belongs to the GP(B-A-B) hybrid glycophorin family, which is the most common hybrid glycophorin in Southeast Asia. Antibodies against GP.Mur may cause a clinically significant haemolytic disease of the foetus and newborn (HDFN) although, so far, not many cases have been reported in mainland China. MATERIALS AND METHODS Two Chinese women with a history of severe hydrops foetalis were seen in our centre. Alloantibody identification and GYP.Mur genotyping analysis were used for prenatal evaluation. Intrauterine transfusion was performed in two pregnancies in case 1. The features of these two women are described and literature-reported cases of HDFN related to antibodies against GP.Mur are summarised. RESULTS The phenotype of both mothers was Mia- Mur-, while the fathers' was Mia+ Mur+ with a heterozygous GYP.Mur hybrid gene as determined by a high-resolution melting method of genotyping. In case 1, the antibodies against GP.Mur were detected in the mother's serum and the cord blood of two foetuses. Fortunately, the latest foetus was successfully saved after intrauterine transfusion. In case 2, hydrops foetalis occurred in the first two pregnancies, but the risk of HDFN was excluded for the third foetus because of the GP.Mur negative phenotype. The literature review showed that 68.8% (11/16) of the reported cases of HDFN related to antibodies against GP.Mur occurred in the Chinese population, and that 37.5% (6/16) of them were cases of severe HDFN. DISCUSSION More cases of severe HDFN caused by antibodies against GP.Mur are presumably undetected as GP.Mur cells are not included in the panel of obligatory screening tests in most Southeast Asian countries including mainland China. The high-resolution melting method for GYP.Mur genotyping and zygosity detection is helpful in prenatal management.
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Lopez GH, Wilson B, Turner RM, Millard GM, Fraser NS, Roots NM, Liew YW, Hyland CA, Flower RL. Frequency of Mi a (MNS7) and Classification of Mi a-Positive Hybrid Glycophorins in an Australian Blood Donor Population. Transfus Med Hemother 2019; 47:279-286. [PMID: 32884500 DOI: 10.1159/000504026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/07/2019] [Indexed: 01/20/2023] Open
Abstract
Background MNS blood group system genes GYPA and GYPB share a high degree of sequence homology and gene structure. Homologous exchanges between GYPA and GYPB form hybrid genes encoding hybrid glycophorins GP(A-B-A) and GP(B-A-B). Over 20 hybrid glycophorins have been characterised. Each has a distinct phenotype defined by the profile of antigens expressed including Mi<sup>a</sup>. Seven hybrid glycophorins carry Mi<sup>a</sup> and have been reported in Caucasian and Asian population groups. In Australia, the population is diverse; however, the prevalence of hybrid glycophorins in the population has never been determined. The aims of this study were to determine the frequency of Mi<sup>a</sup> and to classify Mi<sup>a</sup>-positive hybrid glycophorins in an Australian blood donor population. Method Blood samples from 5,098 Australian blood donors were randomly selected and screened for Mi<sup>a</sup> using anti-Mi<sup>a</sup> monoclonal antibody (CBC-172) by standard haemagglutination technique. Mi<sup>a</sup>-positive red blood cells (RBCs) were further characterised using a panel of phenotyping reagents. Genotyping by high-resolution melting analysis and DNA sequencing were used to confirm serology. Result RBCs from 11/5,098 samples were Mi<sup>a</sup>-positive, representing a frequency of 0.22%. Serological and molecular typing identified four types of Mi<sup>a</sup>-positive hybrid glycophorins: GP.Hut (n = 2), GP.Vw (n = 3), GP.Mur (n = 5), and 1 GP.Bun (n = 1). GP.Mur was the most common. Conclusion This is the first comprehensive study on the frequency of Mi<sup>a</sup> and types of hybrid glycophorins present in an Australian blood donor population. The demographics of Australia are diverse and ever-changing. Knowing the blood group profile in a population is essential to manage transfusion needs.
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Affiliation(s)
- Genghis H Lopez
- Research and Development Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia.,Red Cell Reference Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia.,School of Medical Science, Griffith University, Gold Coast, Queensland, Australia
| | - Brett Wilson
- Red Cell Reference Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Robyn M Turner
- Red Cell Reference Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Glenda M Millard
- Red Cell Reference Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Nicole S Fraser
- Research and Development Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Naomi M Roots
- Red Cell Reference Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Yew-Wah Liew
- Red Cell Reference Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Catherine A Hyland
- Research and Development Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
| | - Robert L Flower
- Research and Development Laboratory, Clinical Services and Research Division, Australian Red Cross Blood Service, Kelvin Grove, Queensland, Australia
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Hassan SN, Thirumulu Ponnuraj K, Mohamad S, Hassan R, Wan Ab Rahman WS. Molecular Detection of Glycophorins A and B Variant Phenotypes and their Clinical Relevance. Transfus Med Rev 2019; 33:118-124. [PMID: 30910255 DOI: 10.1016/j.tmrv.2019.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/14/2019] [Accepted: 02/04/2019] [Indexed: 01/25/2023]
Abstract
Crossover or conversion between the homologous regions of glycophorin A (GYPA) and glycophorin B (GYPB) gives rise to several different hybrid glycophorin genes encoding a number of different glycophorin variant phenotypes which bear low prevalence antigens in the MNS blood group system. GP.Mur is the main glycophorin variant phenotype which causes hemolytic transfusion reaction (HTR) and hemolytic disease of the fetus and newborn (HDFN) in East and Southeast Asians. The detection of glycophorin variant phenotypes using serological methods is limited to phenotyping reagents that are not commercially available. Moreover, the red blood cells used for antibody identification are usually of the GP.Mur phenotype. The current Polymerase Chain Reaction (PCR)-based methods and loop-mediated isothermal amplification (LAMP) are available alternatives to phenotyping that allow for the specific detection of glycophorin variant phenotypes. This review highlights the molecular detection method for glycophorins A and B variant phenotypes and their clinical relevance.
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Affiliation(s)
| | - Kannan Thirumulu Ponnuraj
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia; Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Suharni Mohamad
- School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Rosline Hassan
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
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Wei L, Lopez GH, Zhang Y, Wen J, Wang Z, Fu Y, Hyland CA, Flower RL, Luo G, Ji Y. Genotyping analysis of MNS blood group GP(B‐A‐B) hybrid glycophorins in the Chinese Southern Han population using a high‐resolution melting assay. Transfusion 2018; 58:1763-1771. [DOI: 10.1111/trf.14641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 01/30/2018] [Accepted: 02/11/2018] [Indexed: 01/03/2023]
Affiliation(s)
- Ling Wei
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
| | - Genghis H. Lopez
- Clinical Services and Research, Australian Red Cross Blood ServiceQueensland Australia
| | - Yang Zhang
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
| | - Jizhi Wen
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
| | - Zhen Wang
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
| | - Yongshui Fu
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
| | - Catherine A. Hyland
- Clinical Services and Research, Australian Red Cross Blood ServiceQueensland Australia
| | - Robert L. Flower
- Clinical Services and Research, Australian Red Cross Blood ServiceQueensland Australia
| | - Guangping Luo
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
| | - Yanli Ji
- Institute of Clinical Blood Transfusion, Guangzhou Blood CenterGuangzhou P.R. China
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10
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Schoeman EM, Lopez GH, McGowan EC, Millard GM, O'Brien H, Roulis EV, Liew YW, Martin JR, McGrath KA, Powley T, Flower RL, Hyland CA. Evaluation of targeted exome sequencing for 28 protein-based blood group systems, including the homologous gene systems, for blood group genotyping. Transfusion 2017; 57:1078-1088. [PMID: 28338218 DOI: 10.1111/trf.14054] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 11/22/2016] [Accepted: 12/02/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND Blood group single nucleotide polymorphism genotyping probes for a limited range of polymorphisms. This study investigated whether massively parallel sequencing (also known as next-generation sequencing), with a targeted exome strategy, provides an extended blood group genotype and the extent to which massively parallel sequencing correctly genotypes in homologous gene systems, such as RH and MNS. STUDY DESIGN AND METHODS Donor samples (n = 28) that were extensively phenotyped and genotyped using single nucleotide polymorphism typing, were analyzed using the TruSight One Sequencing Panel and MiSeq platform. Genes for 28 protein-based blood group systems, GATA1, and KLF1 were analyzed. Copy number variation analysis was used to characterize complex structural variants in the GYPC and RH systems. RESULTS The average sequencing depth per target region was 66.2 ± 39.8. Each sample harbored on average 43 ± 9 variants, of which 10 ± 3 were used for genotyping. For the 28 samples, massively parallel sequencing variant sequences correctly matched expected sequences based on single nucleotide polymorphism genotyping data. Copy number variation analysis defined the Rh C/c alleles and complex RHD hybrids. Hybrid RHD*D-CE-D variants were correctly identified, but copy number variation analysis did not confidently distinguish between D and CE exon deletion versus rearrangement. CONCLUSION The targeted exome sequencing strategy employed extended the range of blood group genotypes detected compared with single nucleotide polymorphism typing. This single-test format included detection of complex MNS hybrid cases and, with copy number variation analysis, defined RH hybrid genes along with the RHCE*C allele hitherto difficult to resolve by variant detection. The approach is economical compared with whole-genome sequencing and is suitable for a red blood cell reference laboratory setting.
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Affiliation(s)
| | | | | | | | | | | | - Yew-Wah Liew
- Red Cell Reference Laboratory, Australian Red Cross Blood Service, Brisbane, Queensland, Australia
| | - Jacqueline R Martin
- Red Cell Reference Laboratory, Australian Red Cross Blood Service, Brisbane, Queensland, Australia
| | - Kelli A McGrath
- Red Cell Reference Laboratory, Australian Red Cross Blood Service, Brisbane, Queensland, Australia
| | - Tanya Powley
- Red Cell Reference Laboratory, Australian Red Cross Blood Service, Brisbane, Queensland, Australia
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