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Wang Z, Chu Y, Xiao Y, Bian M. Detecting serologically difficult ABO blood groups using single-molecule real-time sequencing technology. Vox Sang 2024. [PMID: 39137927 DOI: 10.1111/vox.13721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 08/15/2024]
Abstract
BACKGROUND AND OBJECTIVES Recently, third-generation long-read sequencing technology has been increasingly applied to the detection of various blood group systems. Because of its long read length and use of single-molecule sequencing, it is capable of obtaining the sequences of blood group genes in their entirety as well as of distinguishing haplotypes. Therefore, here, we collected ABO blood group samples that were difficult to classify serologically and analysed the sequences of the coding regions of the ABO genes as well as the sequences upstream and downstream of the coding regions. MATERIALS AND METHODS Samples with ABO antigen typing and reverse serum typing discrepancies were screened in a total of 21 patients. All samples were subjected to serological testing and preliminary ABO genotyping (polymerase chain reaction with sequence-specific primers [PCR-SSP]), followed by single-molecule real-time (SMRT) sequencing to obtain complete ABO gene sequences. PCR sequence-based typing (PCR-SBT) was performed to validate the results. RESULTS Of the 21 samples, 15 had common ABO types, and 6 had rare ABO subtypes. One new allele, ABO*B.NEW (c.861C>T), and one allelic base recombination event was identified. Forty-two haplotype sequences were obtained via SMRT sequencing with intronic single-nucleotide variants (SNVs) specific to the ABO allele, and all of the exon region sequences were consistent with the PCR-SBT results. CONCLUSION SMRT sequencing is capable of accurately obtaining complete ABO gene sequences, distinguishing haplotypes and identifying allelic recombination.
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Affiliation(s)
- Zhe Wang
- Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yushuang Chu
- Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yanlin Xiao
- Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Maohong Bian
- Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
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Li T, Shan Y, Zhou X, Zhao Y, Wu L, Huang X, Yang Y, Xie J, Chong J. Serology and molecular genetic analysis of two unrelated individuals with the same novel CisAB blood type. Transfus Apher Sci 2024; 63:103938. [PMID: 38678984 DOI: 10.1016/j.transci.2024.103938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
OBJECTIVE This study aims to report two unrelated individuals with the same novel CisAB blood type and confirm this rare blood type using a comprehensive approach that combines serological and molecular biology techniques. METHODS Peripheral blood samples were collected from two patients and their family members. ABO blood typing and antibody detection were performed using conventional tube methods. Molecular biology techniques were employed to amplify and sequence the 6th and 7th exons of the ABO gene, with reference to gene mutation databases provided by NCBI and ISBT. RESULTS The genotypes of the two unrelated individuals were identical and were confirmed as a new genotype through ISBT gene database comparison. Serological testing results showed different antigen reaction patterns, especially in terms of reverse typing. Gene sequencing identified a series of mutation points, and both unrelated individuals and one of their daughters had mutations at 297 A>G, 526 C>G, 657 C>T, 703 G>A, 803 G>C, and 930 G>A. According to the comprehensive results from The Blood Group Antigen Gene Mutation Database provided by NCBI, the genotype was determined as Bw37. However, based on the results from Names for ABO (ISBT 001) blood group alleles v1.1 171023, the sequencing results indicated a novel mutation combination not found in the ISBT database. Considering the serological reactions of all three individuals, the final determination was CisAB. CONCLUSIONS This study confirmed the novel CisAB blood type in two individuals through the comprehensive application of serology and molecular biology techniques. The identified gene mutation points were not recorded in known databases, emphasizing the uniqueness of CisAB blood types. This research provides important insights into the genetic basis of ABO subtypes and the characteristics of CisAB blood types, and the relevant results have been submitted to the ISBT website for further research.
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Affiliation(s)
| | - Yongqiang Shan
- Tianjin Medical University General Hospital, Tianjin, China.
| | - Xinhua Zhou
- Hetian District People's Hospital of Xinjiang Uygur Autonomous Region, Xinjiang, China
| | - Ying Zhao
- Tianjin Blood Center, Tianjin, China
| | - Lina Wu
- Tianjin Blood Center, Tianjin, China
| | | | - Yang Yang
- Tianjin Blood Center, Tianjin, China
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Lei H, Zhang H, Wang Y, Li J, Wang X, Lou C, Cai X. One novel single nucleotide polymorphism c.424A>G on A1.02 allele in ABO glycosyltransferases leads to A weak phenotype. J Formos Med Assoc 2024:S0929-6646(24)00088-3. [PMID: 38331639 DOI: 10.1016/j.jfma.2024.02.001] [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: 11/30/2023] [Revised: 01/28/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND The dysfunction of the ABO glycosyltransferase (GT) enzyme, which is caused by mutations in the ABO gene, can lead to weak ABO phenotypes. In this study, we have discovered a novel weak ABO subgroup allele and investigated the underlying mechanism to causing its Aweak phenotype. MATERIALS AND METHODS The ABO phenotyping and genotyping were performed by serological studies and direct DNA sequencing of ABO gene. The role of the novel single nucleotide polymorphism (SNP) was evaluated by 3D model, predicting protein structure changes, and in vitro expression assay. The total glycosyltransferase transfer capacity in supernatant of transfected cells was examined. RESULTS The results of serological showed the subject was Aweak phenotype. A novel SNP c.424A > G (p. M142V) based on ABO*A1.02 was identified, and the genotype of the subject was AW-var/O.01 according to the gene analysis. In silico analysis showed that the SNP c.424A > G on the A allele may change the local conformation by damaging the hydrogen bonds and reduce the stability of GT. In vitro expression study showed that SNP p.M142V impaired H to A antigen conversion, although it did not affect the generation of A glycosyltransferase (GTA). CONCLUSIONS One novel AW allele was identified and the SNP c.424A > G (p.M142V) can cause the Aweak phenotype through damaging the hydrogen bonds and reducing stability of the GTA.
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Affiliation(s)
- Hang Lei
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Zhang
- Department of Blood Transfusion, Minhang Hospital, Fudan University, Shanghai, China
| | - Yuqing Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiaming Li
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xuefeng Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Can Lou
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Xiaohong Cai
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Liu H, Liu H, Gui R, Huang R, Chen X, Dai X, Zhou S, Xiao X, Chen W. Identification of two novel c.11_15dup; c.17G>A variations in the ABO*B.01 allele giving rise to a weak B phenotype. Transfusion 2024; 64:E6-E8. [PMID: 38197182 DOI: 10.1111/trf.17708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 09/02/2023] [Accepted: 12/08/2023] [Indexed: 01/11/2024]
Affiliation(s)
- Hongbo Liu
- Department of Blood Transfusion, Loudi Center Hospital, Loudi City, China
| | - Hongmei Liu
- Clinical Research Center and Division of Mood Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Rong Gui
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China
| | - Rong Huang
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China
| | - Xing Chen
- Department of Blood Transfusion, Loudi Center Hospital, Loudi City, China
| | - Xiaohui Dai
- Department of Blood Transfusion, Loudi Center Hospital, Loudi City, China
| | - Shiqiao Zhou
- Blood Transfusion Department, Shenzhen Hospital of southern Medical University, Shenzhen City, China
| | - Xiaohong Xiao
- Department of Blood Transfusion, Loudi Center Hospital, Loudi City, China
| | - Wei Chen
- Department of Blood Transfusion, Loudi Center Hospital, Loudi City, China
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Lei H, Zhang H, Guo L, Xiang D, Wang X, Liu X, Cai X. Identification of a novel variant c.761C>T on ABO*B.01 gene in ABO glycosyltransferases associated with B weak phenotype. Vox Sang 2023; 118:895-900. [PMID: 37563965 DOI: 10.1111/vox.13511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 06/11/2023] [Accepted: 07/27/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND AND OBJECTIVES ABO antigens are produced from H antigen by the activity of glycosyltransferase enzyme encoded by the ABO gene. Variants in the ABO gene can produce a weak ABO phenotype. In this study, we identify a novel ABO*BW allele and investigate the underlying mechanism leading to the Bweak phenotype. MATERIALS AND METHODS The ABO phenotype and genotype of the sample were determined using serological and direct DNA sequencing methods. We assessed the impact of the novel variant by three-dimensional modelling to predict protein stability changes (ΔΔG), and carried out an in vitro expression assay. The total glycosyltransferase transfer capacity in the supernatant of transfected cells was also examined. RESULTS Serological analysis confirmed the Bweak phenotype in the subject, and gene sequencing identified a novel variant c.761C>T (p.A254V) on the ABO*B.01 allele, resulting in a BW-var/O.01.02 genotype. In silico analysis suggested that the p.A254V variant on the B allele may reduce the stability of glycosyltransferase B (GTB), as indicated by the ΔΔG values. In vitro expression studies showed that the variant p.A254V impaired H to B antigen conversion, although it did not affect the expression of GTB. CONCLUSION We identified a novel BW allele and demonstrated that the variant c.761C>T (p.A254V) can cause the Bweak phenotype by reducing the stability of GTB.
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Affiliation(s)
- Hang Lei
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Zhang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Blood Transfusion, Minhang Hospital, Fudan University, Shanghai, China
| | - Liujun Guo
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dong Xiang
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Xuefeng Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xi Liu
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Xiaohong Cai
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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6
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Mother-newborn ABO group discrepancy caused by a rare BW.17 variant. Transfus Apher Sci 2022:103621. [DOI: 10.1016/j.transci.2022.103621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/30/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
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Wang Y, Mou Q, Lei H, Heililahong H, Zou W, Wang X, Qian C, Cai X. Molecular biology analysis of ABO blood group variants caused by natural chimaerism. Vox Sang 2022; 117:1310-1317. [PMID: 36102146 DOI: 10.1111/vox.13356] [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: 06/08/2022] [Revised: 08/07/2022] [Accepted: 08/19/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND OBJECTIVES The chimaerism phenomenon constitutes a significant mechanism underlying ABO phenotype discrepancies; however, its detection has technical challenges. In the current study, we explored different techniques to establish the chimaeric status of ABO blood types. MATERIALS AND METHODS Fifteen individuals with possible chimaeric ABO blood type, as suggested by standard tube or column agglutination method and RBC adsorption-elution test, were enrolled in the study. The red blood cells from 11 investigated subjects showed mix-field agglutination with anti-A or anti-B in blood typing; weak A or B antigens on the other four individuals' RBCs were detected by adsorption-elution tests. The genetic study was conducted with PCR-SSP genotype, DNA sequencing of the ABO gene, STR analysis and ddPCR. RESULTS The genetic chimaeric status was confirmed in four (27%) individuals by SSP test alone. The ABO gene sequencing identified an additional ABO allele and enabled chimaerism detection in 10 (67%) subjects. The STR analyses established the chimaerism status in 13 (87%) individuals. In the two cases where neither of the tests mentioned above had positive findings, the ddPCR was adopted, and microchimaerism, with an extremely low degree of chimaerism (0.77% and 0.12%), was revealed. The ddPCR revealed the unequal haplotypes (29.5% B vs. 70.5% O) in one subject and distinguished this B/O-O/O chimaera from certain B subgroups (B/O genotype without any mutation) like B3 . CONCLUSION The ABO blood type chimaerism can be genetically established by comprehensive molecular methods, including PCR-SSP/DNA sequencing, STR and ddPCR, which is particularly sensitive for the detection of microchimaerism.
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Affiliation(s)
- Yuqing Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiuju Mou
- Department of Blood Transfusion, The Affiliated Hospital of Guizhou Medical University, Guizhou, China
| | - Hang Lei
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hasiyati Heililahong
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Zou
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xuefeng Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengrui Qian
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Xiaohong Cai
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Blood Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Deng D, Deng G, He Y, Yu Y. Identification of a novel A allele with c.478C>T missense mutation on the ABO*A1.02 background. Transfusion 2022; 62:E47-E48. [PMID: 35916252 DOI: 10.1111/trf.17041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/09/2022] [Accepted: 06/11/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Danfei Deng
- Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China
| | - Gang Deng
- Ningbo Central Blood Station, Ningbo, China
| | - Yunlei He
- Ningbo Central Blood Station, Ningbo, China
| | - Yong Yu
- Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China
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9
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Yuan X, Cong H, Sun X. Molecular genetic mechanism analysis and pedigree investigation of rare B weak subgroup. Transfus Apher Sci 2022; 61:103509. [PMID: 35842292 DOI: 10.1016/j.transci.2022.103509] [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: 05/25/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To analyze the molecular mechanism of rare Bweak subgroup in the ABO blood group system and conduct pedigree investigations. METHODS The blood group was detected by conventional serological method, and ABO gene of proband and her family was amplified and sequenced by polymerase chain reaction method. RESULTS The study showed that the proband was a Bweak phenotype by conventional serological method. Her family's serological results were as follows, her father and eldest brother were Bweak subgroup while her mother and second eldest brother were O group. The proband's ABO gene sequencing result was ABO*BW.27/ABO*O.01.02. Her father, mother and two elder brothers were ABO*BW.27/ABO*O.01.01, ABO*O.01.01/ABO*O.01.02, ABO*BW.27/ABO*O.01.02, ABO*O.01.01/ABO*O.01.02. CONCLUSION Conventional blood group serology combined with molecular diagnostic technology can accurately identify the Bweak subgroup, and the pedigree investigation analysis showed that the proband's allelic mutation came from her father. She has gained a point mutation of c.905A>G on the basis of ABO*B.01.
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Affiliation(s)
- Xiaohua Yuan
- Department of Blood Transfusion, The Affiliated Maternity and Child Health Care Hospital of Nantong University, Nantong 226001, China
| | - Hui Cong
- Department of Blood Transfusion, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - Xiaoye Sun
- Department of Blood Transfusion, Affiliated Hospital of Nantong University, Nantong 226001, China.
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He Y, Hong X, Zhang J, He J, Zhu F, Huang H. Analysis of the Genomic Sequence of ABO Allele Using Next-Generation Sequencing Method. Front Immunol 2022; 13:814263. [PMID: 35874750 PMCID: PMC9298404 DOI: 10.3389/fimmu.2022.814263] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundAlthough many molecular diagnostic methods have been used for ABO genotyping, there are few reports on the full-length genomic sequence analysis of the ABO gene. Recently, next-generation sequencing (NGS) has been shown to provide fast and high-throughput results and is widely used in the clinical laboratory. Here, we established an NGS method for analyzing the sequence of the start codon to the stop codon in the ABO gene.Study Design and MethodsTwo pairs of primers covering the partial 5’-untranslated region (UTR) to 3’-UTR of the ABO gene were designed. The sequences covering from the start codon to the stop codon of the ABO gene were amplified using these primers, and an NGS method based on the overlap amplicon was developed. A total of 110 individuals, including 88 blood donors with normal phenotypes and 22 ABO subtypes, were recruited and analyzed. All these specimens were first detected by serological tests and then determined by polymerase chain reaction sequence-based typing (PCR-SBT) and NGS. The sequences, including all the intron regions for the specimens, were analyzed by bioinformatics software.ResultsAmong the 88 blood donors with a normal phenotype, 48 homozygous individuals, 39 heterozygous individuals, and one individual with a novel O allele were found according to the results of the PCR-SBT method. Some single-nucleotide variants (SNV) in intronic regions were found to be specific for different ABO alleles from 48 homozygous individuals using the NGS method. Sequences in the coding region of all specimens using the NGS method were the same as those of the PCR-SBT method. Three intronic SNVs were found to be associated with the ABO subtypes, including one novel intronic SNV (c.28+5956T>A). Moreover, six specimens were found to exhibit DNA recombination.ConclusionAn NGS method was established to analyze the sequence from the start codon to the stop codon of the ABO gene. Two novel ABO alleles were identified, and DNA recombination was found to exist in the ABO alleles.
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Affiliation(s)
- Yanmin He
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Institute of Transfusion medicine, Blood Center of Zhejiang Province, Hangzhou, China
- Key Laboratory of Blood Safety Research of Zhejiang Province, Hangzhou, China
| | - Xiaozhen Hong
- Institute of Transfusion medicine, Blood Center of Zhejiang Province, Hangzhou, China
- Key Laboratory of Blood Safety Research of Zhejiang Province, Hangzhou, China
| | - Jingjing Zhang
- Institute of Transfusion medicine, Blood Center of Zhejiang Province, Hangzhou, China
- Key Laboratory of Blood Safety Research of Zhejiang Province, Hangzhou, China
| | - Ji He
- Institute of Transfusion medicine, Blood Center of Zhejiang Province, Hangzhou, China
- Key Laboratory of Blood Safety Research of Zhejiang Province, Hangzhou, China
| | - Faming Zhu
- Institute of Transfusion medicine, Blood Center of Zhejiang Province, Hangzhou, China
- Key Laboratory of Blood Safety Research of Zhejiang Province, Hangzhou, China
- *Correspondence: He Huang, ; Faming Zhu,
| | - He Huang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou, China
- Institute of Hematology, Zhejiang University, Hangzhou, China
- Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou, China
- *Correspondence: He Huang, ; Faming Zhu,
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He Y, Zhang J, Yu L, Shen L, Zhong F, Deng G. Identification of a novel A allele with a c.423 C > A mutation on the ABO*A1.02 allele. Transfusion 2022; 62:E32-E33. [PMID: 35587590 DOI: 10.1111/trf.16900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/17/2022] [Accepted: 04/20/2022] [Indexed: 11/27/2022]
Affiliation(s)
- Yunlei He
- The Institute of Blood Transfusion, Ningbo Central Blood Station, Ningbo, China
| | - Jiwei Zhang
- The Institute of Blood Transfusion, Ningbo Central Blood Station, Ningbo, China
| | - Lu Yu
- The Institute of Blood Transfusion, Ningbo Central Blood Station, Ningbo, China
| | - Longqiang Shen
- The Institute of Blood Transfusion, Ningbo Central Blood Station, Ningbo, China
| | - Fade Zhong
- The Institute of Blood Transfusion, Ningbo Central Blood Station, Ningbo, China
| | - Gang Deng
- The Institute of Blood Transfusion, Ningbo Central Blood Station, Ningbo, China
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Lei H, Shen Y, Wang Y, Su N, Wang X, Cai X. A Para-Bombay Blood Group Case Associated with a Novel FUT1 Mutation c.361G>A. Transfus Med Hemother 2021; 48:254-258. [PMID: 34539321 DOI: 10.1159/000513318] [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: 05/20/2020] [Accepted: 11/24/2020] [Indexed: 11/19/2022] Open
Abstract
Background Here we report a case of para-Bombay phenotype due to a novel mutation FUT1 c.361G>A p.(Ala121Thr) and a nonfunctional allele FUT1*01N.13(c.881_882delTT) which showed a discrepancy in the routine ABO blood group typing. Materials and Methods The ABO phenotype and the Lewis blood group were typed with serological methods. The ABH antigens in saliva were determined by a hemagglutination inhibition test. The CDS region of ABO, FUT1and FUT2 were amplified with polymerase chain reaction and then directly sequenced. The novel mutation was confirmed by cloning and sequencing. Three-dimensional (3-D) structural analysis of the mutant and wild-type Fut1 were performed by the Chimera software. Results A, B and H antigens were not detected on the surface of red blood cells (RBCs) by the serological technique, and the B and H blood group substances were detected in the saliva, while the Lewis phenotype was Le(a-b+). Sequencing and cloning analysis showed the presence of a novel FUT1 mutation c.361G>A and a nonfunctional allele FUT1*01N.13(c.881_882delTT). The ABO genotype was ABO*B.01/ABO*O.01.01. The in silico analysis showed that the mutation p.(Ala121Thr) of FUT1did not change the 3-D structure of the whole enzyme but caused a certain amplitude of turnover in the loop region where Ala121 was located. Conclusions A novel FUT1 allele (FUT1*c.361G>A) was identified in a Chinese individual with para-Bombay B phenotype. The FUT1c.361G>A mutation may significantly downregulate the expression of H antigens on RBCs by damaging the enzyme conformation.
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Affiliation(s)
- Hang Lei
- Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuqing Shen
- Transfusion Department, Woman and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Yuqing Wang
- Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Naizhu Su
- Transfusion Department, Woman and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Xuefeng Wang
- Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaohong Cai
- Transfusion Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Lei H, Lu Q, Xiang D, Wang X, Cai X. ABO gene mutation c.815_816insG in an African individual forms a novel A el allele. Transfusion 2021; 61:E51-E52. [PMID: 33899249 DOI: 10.1111/trf.16419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/26/2021] [Accepted: 04/05/2021] [Indexed: 11/26/2022]
Affiliation(s)
- Hang Lei
- Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Qiong Lu
- Blood Group Reference Laboratory, Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Dong Xiang
- Blood Group Reference Laboratory, Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Xuefeng Wang
- Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Xiaohong Cai
- Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
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14
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He B, Li B, Liu J, Liu X. Identification of a novel A allele with a missense mutation (c.737A>G) in a Chinese individual with a weak A phenotype. Transfusion 2020; 60:E28-E29. [DOI: 10.1111/trf.15929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/01/2020] [Accepted: 05/18/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Baoren He
- Nanning Institute of Transfusion Medicine, Nanning Blood Center Nanning China
| | - Bin Li
- Nanning Institute of Transfusion Medicine, Nanning Blood Center Nanning China
| | - Jinlian Liu
- Nanning Institute of Transfusion Medicine, Nanning Blood Center Nanning China
| | - Xuejun Liu
- Nanning Institute of Transfusion Medicine, Nanning Blood Center Nanning China
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15
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Han B, Liu L, Feng Z, Bu X. A novel A allele with c.
499G
>A mutation identified in a Chinese individual. Transfusion 2020; 60:E15-E16. [DOI: 10.1111/trf.15804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 10/24/2022]
Affiliation(s)
- Bin Han
- Qingdao Blood Center Institute of Transfusion Medicine Qingdao China
| | - Li Liu
- Qingdao Blood Center Institute of Transfusion Medicine Qingdao China
| | - Zhihui Feng
- Qingdao Blood Center Institute of Transfusion Medicine Qingdao China
| | - Xiangmao Bu
- Department of Blood Transfusion Affiliated Qingdao Women and Children's Hospital, Qingdao University Qingdao China
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16
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Zuo Q, Duan Y, Wang B, Xu H, Wu W, Zhao J, Wu D, Chu X, Chen W. Genomic analysis of blood samples with serologic ABO discrepancy identifies 12 novel alleles in a Chinese Han population. Transfus Med 2020; 30:308-316. [PMID: 32452063 DOI: 10.1111/tme.12686] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 02/13/2020] [Accepted: 04/24/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES This study aimed at identifying new ABO alleles from155 unrelated blood samples with potential ABO discrepancy in a Chinese Han population of 835 144 donors. BACKGROUND Serological strategies and genotyping are crucial for the precise determination of ABO discrepancy. METHODS Their ABO phenotypes and plasma glycosyltransferase activity were determined by standard forward and reverse typing and dilution tests. The genomic DNA of the ABO gene was amplified by polymerase chain reaction and sequenced. The frequency of ABO subgroup alleles associated with ABO discrepancy was analysed. RESULTS Serological analysis indicated that 53, 96 and 6 samples with ABO discrepancy were identified in the A, B and O subgroups, respectively. Genetic analysis revealed 12 novel alleles among the 46 associated with serologic ABO discrepancy. The majority of novel alleles was obtained from point mutations or single base insertion in Exons 6 to 7 of the ABO gene. The most frequent alleles were ABO*cisAB.01 (14/53, 26.42%) and ABO*A2.05 (7/53, 13.2%) in the A subgroup and ABO*BA.02 (34/96, 35.42%) and ABO*BEL.11 (15/96, 15.62%) in the B subgroup. Samples with the same ABO subgroup allele displayed different phenotypes, such as ABO*AX.13, ABO*BW.03, ABO*BW.12, ABO*BW.15, ABO*BEL.03, ABO*BEL.10 and ABO*BEL.11. CONCLUSION This study identified 12 novel alleles among the 46 associated with serologic ABO discrepancies. ABO genotyping is needed for the accurate evaluation of blood phenotype to improve the safety of blood transfusion.
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Affiliation(s)
- Qinqin Zuo
- Department of Clinical Laboratory, the First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, Xi'an, China.,Blood Group Reference Laboratory, Shaanxi Blood Center, Xi'an, China
| | - Yong Duan
- Blood Group Reference Laboratory, Shaanxi Blood Center, Xi'an, China
| | - Baoyan Wang
- Department of Blood Transfusion, the First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, Xi'an, China
| | - Hua Xu
- Blood Group Reference Laboratory, Shaanxi Blood Center, Xi'an, China
| | - Wenjing Wu
- Department of Clinical Laboratory, the First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, Xi'an, China
| | - Jingwen Zhao
- Blood Group Reference Laboratory, Shaanxi Blood Center, Xi'an, China
| | - Dazhou Wu
- Blood Group Reference Laboratory, Shaanxi Blood Center, Xi'an, China
| | - Xiaoyue Chu
- Blood Group Reference Laboratory, Shaanxi Blood Center, Xi'an, China
| | - Wei Chen
- Department of Clinical Laboratory, the First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, Xi'an, China
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17
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Lei H, Shen Y, Wang Y, Zou W, Su N, Wang X, Cai X. Novel mutation
c.618C>G (p.Tyr206Ter)
in glycosyltransferase A leads to
ABO
discrepancy. Transfusion 2020; 60:E11-E12. [PMID: 32441339 DOI: 10.1111/trf.15829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/07/2020] [Accepted: 03/13/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Hang Lei
- Transfusion DepartmentRuijin Hospital, Medical School of Shanghai Jiao Tong University Shanghai China
| | - Yuqing Shen
- Transfusion DepartmentWomen and Children's Hospital, School of Medicine, Xiamen University Xiamen Fujian China
| | - Yuqing Wang
- Transfusion DepartmentRuijin Hospital, Medical School of Shanghai Jiao Tong University Shanghai China
| | - Wei Zou
- Transfusion DepartmentRuijin Hospital, Medical School of Shanghai Jiao Tong University Shanghai China
| | - Naizhu Su
- Transfusion DepartmentWomen and Children's Hospital, School of Medicine, Xiamen University Xiamen Fujian China
| | - Xuefeng Wang
- Transfusion DepartmentRuijin Hospital, Medical School of Shanghai Jiao Tong University Shanghai China
| | - Xiaohong Cai
- Transfusion DepartmentRuijin Hospital, Medical School of Shanghai Jiao Tong University Shanghai China
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18
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Two novel mutations p. L319V and p. L91P in ABO glycosyltransferases lead to A el and B el phenotypes. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2020; 18:471-477. [PMID: 32281923 DOI: 10.2450/2020.008-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 03/12/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUND Mutations of the ABO gene may cause the dysfunction of ABO glycosyltransferase (GT) that can result in weak ABO phenotypes. Here, we identified two novel weak ABO subgroup alleles and explored their mechanisms that caused Ael and Bel phenotypes. MATERIALS AND METHODS The ABO phenotyping and genotyping were performed by serological studies and direct DNA sequencing of the ABO gene. The role of the novel mutations were evaluated by a three-dimensional model, predicting protein structure changes, and in vitro expression assay. The total glycosyltransferase transfer capacity in supernatant of transfected cells was examined. RESULTS We identified a mutation c. 955C>G (p. L319V) of A allele in an Ael subject and a mutation c. 272T>C (p. L91P) of B allele in a Bel subject. In silico analysis showed that the mutation p. L319V of the A allele and p. L91P of the B allele may change the local conformation of GT and impair the catalysis of H to A or B antigen conversion. In vitro expression study showed that mutation p. L319V impaired H to A antigen conversion, although it did not affect the expression of glycosyltransferase A. CONCLUSIONS Two novel "el"-type ABO subgroup alleles were identified. Both of the two novel mutations can change the local conformation of GTs and reduce protein stability. GTA mutation p. L319V can impair the conversion from H to A antigen and causes the Ael phenotype.
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19
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Nair R, Gogri H, Kulkarni S, Gupta D. Detection of a rare subgroup of A phenotype while resolving ABO discrepancy. Asian J Transfus Sci 2020; 13:129-131. [PMID: 31896920 PMCID: PMC6910028 DOI: 10.4103/ajts.ajts_118_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/08/2018] [Indexed: 11/04/2022] Open
Abstract
Weaker subgroups of ABO blood group system give rise to discrepancies between forward and reverse grouping and cause diagnostic difficulties in routine blood banking. Weaker subgroups of A blood group that have been reported so far include A3, Aend, Ax, Am, Ay, and Ael. We report a case of a 54-year-old patient whose red cells showed a discrepancy between cell and serum grouping on initial testing. Serological investigation included absorption elution tests and saliva testing after performing initial blood grouping. Molecular genotyping of the ABO gene was performed by DNA sequencing of exons 6 and 7 of the ABO gene. The serological characteristics of the patient's red cells were similar to Ax subtype. The patient was a secretor and only H substance was present in the saliva. Serum did not show the presence of anti-A1. Molecular genotyping confirmed the ABO status as Aw06/O13. The weak A phenotype identified in the propositus had serological characteristics similar to Ax and showed the ABO genotype Aw06/O13. Although Aw06 allele has been previously reported in the Indian population, this is the first study to report O13 allele in the Indian population.
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Affiliation(s)
- Revathy Nair
- Department of Transfusion Medicine, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Harita Gogri
- Department of Transfusion Medicine, National Institute of Immunohaematology, Mumbai, Maharashtra, India
| | - Swati Kulkarni
- Department of Transfusion Medicine, National Institute of Immunohaematology, Mumbai, Maharashtra, India
| | - Debasish Gupta
- Department of Transfusion Medicine, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
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20
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Yang X, Ma S, Xie H, Sun J, Chen L, Chen F. c.543G>C mutation in ABO*A.1.02 allele responsible for a weak A phenotype. Transfusion 2019; 59:2756-2757. [PMID: 31260107 DOI: 10.1111/trf.15430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 05/12/2019] [Accepted: 05/29/2019] [Indexed: 11/27/2022]
Affiliation(s)
- Xiaojun Yang
- Department of Transfusion Medicine, Clinical College of Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China
| | - Shuqun Ma
- Department of Transfusion Medicine, Fuqing Hospital, Fuzhou, China
| | - Haihua Xie
- Department of Clinical Laboratory, Fujian Provincial Jinshan Hospital, Fuzhou, China
| | - Jiafeng Sun
- Department of Clinical Laboratory, Fujian Provincial Jinshan Hospital, Fuzhou, China
| | - Liangyuan Chen
- Department of Transfusion Medicine, Clinical College of Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China
| | - Fawen Chen
- Department of Transfusion Medicine, Clinical College of Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China.,Department of Clinical Laboratory, Fujian Provincial Jinshan Hospital, Fuzhou, China
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21
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Yang X, Xie H, Chen L, Lin H, Chen F. Identification of a novel B allele with multiple missense mutations in a Chinese family with a Bw phenotype. Transfusion 2018; 58:2741-2742. [PMID: 30222859 DOI: 10.1111/trf.14873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/29/2018] [Accepted: 04/15/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaojun Yang
- Department of Transfusion Medicine, Clinical College of Fujian Provincial Hospital, Fujian Medical University
| | - Haihua Xie
- Department of Transfusion Medicine, Fujian Provincial Jinshan Hospital, Fuzhou, Fujian, China
| | - Liangyuan Chen
- Department of Transfusion Medicine, Clinical College of Fujian Provincial Hospital, Fujian Medical University
| | - Haibin Lin
- Department of Transfusion Medicine, Fujian Provincial Jinshan Hospital, Fuzhou, Fujian, China
| | - Fawen Chen
- Department of Transfusion Medicine, Clinical College of Fujian Provincial Hospital, Fujian Medical University.,Department of Transfusion Medicine, Fujian Provincial Jinshan Hospital, Fuzhou, Fujian, China
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22
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Cai X, Li F, Lei H, Qu S, Qian C, Xiang D, Wei DQ, Wu W, Xu Q, Wang X. p.R180C mutation of glycosyltransferase B leads to B subgroup, an in vitro and in silico study. Vox Sang 2018; 113:476-484. [PMID: 29726014 DOI: 10.1111/vox.12655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/26/2018] [Accepted: 03/28/2018] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND OBJECTIVES Dysfunctional glycosyltransferase A or B may lead to incomplete glycosylation of H antigen and atypical ABO blood group with weak A or B phenotypes, posing challenges for blood typing for transfusion. MATERIALS AND METHODS Serological studies and ABO gene analysis were performed. Flow cytometry was performed on HeLa cells transfected glycosyltransferase B expressing plasmids. Agglutination of transfected cells and total glycosyltransferase B transfer capacity were examined. Molecular dynamics simulations were used to explore possible dynamic conformational changes around the binding pocket. RESULTS We identified a mutation c.538C>T (p. R180C) of B allele in a Chinese donor and his father with ABw phenotype. In vitro expression study showed that mutation p.R180C, although not affecting expression of glycosyltransferase B, impaired H to B antigen conversion. The in silico analyses found that the residue Arg180 on the internal loop next to the entry of the binding pocket may have its long side chain salt-bridged with the highly flexible C-terminal carboxyl and contribute to the catalysis of H to B antigen conversion. CONCLUSION The p.R180C mutation impairs the conversion from H to B antigen and leads to weak B phenotype. Dynamic interaction between Arg180 and C-terminal of glycosyltransferase B may stabilize its binding with UDP-galactose and facilitate H/B antigen conversion.
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Affiliation(s)
- X Cai
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - F Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - H Lei
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - S Qu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - C Qian
- Blood Group Reference Laboratory, Shanghai Blood Center, Shanghai, China
| | - D Xiang
- Blood Group Reference Laboratory, Shanghai Blood Center, Shanghai, China
| | - D-Q Wei
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - W Wu
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Q Xu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - X Wang
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
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23
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Gogri H, Ray S, Agrawal S, Aruna S, Ghosh K, Gorakshakar A. Heterogeneity of O blood group in India: Peeping through the window of molecular biology. Asian J Transfus Sci 2018; 12:62-68. [PMID: 29563678 PMCID: PMC5850700 DOI: 10.4103/ajts.ajts_12_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND: Molecular genotyping of ABO blood group system has identified more than 60 “O” group alleles based on the single-nucleotide polymorphisms present in the ABO gene. Heterogeneity of O group alleles has been observed in various countries from South America, Europe, Middle East, and Asia. India is a vast country with more than 1300 million population which is divided into various ethnic and tribal groups. However, very little is known about the heterogeneity of O alleles in Indians. MATERIALS AND METHODS: A total of 116 O group individuals from the mixed population of Mumbai, India, were enrolled in the present study. DNA was extracted using the standard phenol–chloroform method. The exons 6 and 7 of the ABO gene were genotyped by polymerase chain reaction-single-strand conformation polymorphism and/or DNA sequencing. The genotyping results were compared with our earlier findings. RESULTS AND DISCUSSION: Overall, ten different genotypes were identified. Three rare alleles, namely, O05, O11, and O26 were seen in the mixed group category. These results suggest that there is an internal heterogeneity in the mixed group while Dhodias and Parsis, the groups which were screened earlier, seem to be more homogenous groups. An important piece of information emerges out from this study, that is, O01O02 genotype is expressing some selective force in population groups screened in India as well as many other groups worldwide. CONCLUSION: In the future, molecular genotyping of the ABO blood group system among different ethnic and tribal Indian groups would help in generating data to fill up the gaps in the molecular ABO map of the world.
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Affiliation(s)
- Harita Gogri
- Department of Transfusion Medicine, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, Maharashtra, India
| | - Sabita Ray
- Department of Transfusion Medicine, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, Maharashtra, India
| | - Snehal Agrawal
- Department of Transfusion Medicine, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, Maharashtra, India
| | - S Aruna
- Department of Transfusion Medicine, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, Maharashtra, India
| | - Kanjaksha Ghosh
- Department of Transfusion Medicine, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, Maharashtra, India
| | - Ajit Gorakshakar
- Department of Transfusion Medicine, National Institute of Immunohaematology, Indian Council of Medical Research, Mumbai, Maharashtra, India
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24
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Cai X, Qian C, Wu W, Lei H, Ding Q, Zou W, Xiang D, Wang X. An exonic missense mutation c.28G>A is associated with weak B blood group by affecting RNA splicing of the ABO gene. Transfusion 2017; 57:2140-2149. [PMID: 28653406 DOI: 10.1111/trf.14209] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 05/08/2017] [Accepted: 05/11/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND The amino acid substitutions caused by ABO gene mutations are usually predicted to impact glycosyltransferase's function or its biosynthesis. Here we report an ABO exonic missense mutation that affects B-antigen expression by decreasing the mRNA level of the ABO gene rather than the amino acid change. STUDY DESIGN AND METHODS Serologic studies including plasma total GTB transfer capacity were performed. The exon sequences of the ABO gene were analyzed by Sanger sequencing. B310 cDNA with c.28G>A (p.G10R) mutation was expressed in HeLa cells and total GTB transfer capacity in cell supernatant was measured. Flow cytometry was performed on these HeLa cells after transfection, and agglutination of Hela-Bweak cells was also examined. The mRNA of the ABO gene was analyzed by direct sequencing and real-time reverse transcriptase-polymerase chain reaction. A minigene construct was prepared to evaluate the potential of splicing. RESULTS While plasma total GTB transfer capacity was undetectable in this B3 -like individual, the relative percentage of antigen-expressing cells and mean fluorescence index of the Bweak red blood cells (RBCs) were 19 and 14% of normal B RBCs, respectively. There was no significant difference of total GTB transfer capacity in cell supernatant and B-antigen expression on cell surfaces between HeLa cells transfected with B310 cDNA and B cDNA. The mRNA expression level of B310 in peripheral whole blood was significantly reduced. The amount of splicing is significantly lower in c.28G>A construct compared to that in wild-type construct after transfection in K562 cells. CONCLUSION ABO c.28G>A mutation may cause B3 -like subgroup by affecting RNA splicing of the ABO gene.
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Affiliation(s)
- Xiaohong Cai
- Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Chengrui Qian
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Wenman Wu
- Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Hang Lei
- Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Qiulan Ding
- Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Wei Zou
- Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Dong Xiang
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - Xuefeng Wang
- Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
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25
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Zhang A, Chi Q, Lin H, She Y. Molecular genetic analysis of the Jk(a-b-) phenotype in Chinese: A novel silent recessive JK allele. Transfus Apher Sci 2016; 54:232-4. [PMID: 26969102 DOI: 10.1016/j.transci.2015.04.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 11/24/2022]
Abstract
The Jk(a-b-) phenotype, referred to as Jknull, is rare in most populations. This blood type is characterized by the absence of Kidd glycoprotein on the surface of red blood cells (RBCs) and moderately reduced ability to concentrate urine. The molecular basis for Jknull phenotype includes splice-site mutations, missense mutations, and a partial gene deletion in the JK(SLC14A1) gene that encodes the human urea transporter protein. In this study, we have analyzed 10 Chinese Jknull samples to determine their molecular bases. In addition to the well known Polynesian Jknull allele, three Jknull alleles were detected including one novel Jknull allele: JKA (130A, 220G).
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Affiliation(s)
- Ai Zhang
- Fujian Provincial Blood Center, Fuzhou 350004, Fujian, China.
| | - Quan Chi
- Fujian Provincial Blood Center, Fuzhou 350004, Fujian, China; Department of Transfusion Medicine, Fujian Medical University, Fuzhou 350004, Fujian, China.
| | - Hongkeng Lin
- Fujian Provincial Blood Center, Fuzhou 350004, Fujian, China
| | - Yimin She
- Fujian Provincial Blood Center, Fuzhou 350004, Fujian, China
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26
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Wu Y, Fan L, Liu M, Shen W, Xiang D, Cai X. Anti-Di(b) causing hemolytic disease of the fetus and newborn and the challenges of anti-Di(b) in perinatal management in China. Transfus Med 2015; 25:428-30. [PMID: 26578228 DOI: 10.1111/tme.12260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 07/22/2015] [Accepted: 10/24/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Y Wu
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China.,Blood Group Reference Laboratory, Taiyuan Red Cross Blood Center, Taiyuan, China
| | - L Fan
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - M Liu
- Children's Hospital of Fudan University, Blood Transfusion Department, Shanghai, China
| | - W Shen
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - D Xiang
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China
| | - X Cai
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center, Shanghai, China.,Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
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27
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Molecular characterization of weaker variants of A and B in Indian population--the first report. Transfus Apher Sci 2013; 50:118-22. [PMID: 24238826 DOI: 10.1016/j.transci.2013.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 09/30/2013] [Accepted: 10/15/2013] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND OBJECTIVES The ABO blood group system is extremely important blood group system in transfusion medicine and weaker variants of A and B are subgroups of the system. From a Country like India with 1.2 billion population sporadic reports detecting weaker variants of A and B serologically are published. Therefore the main objective of the present study is to identify weaker variants of A and B serologically and characterize them at molecular level. MATERIALS AND METHODS Eight samples which were referred to us for resolving discrepancies in forward and reverse grouping were first phenotype in our laboratory by standard serologic techniques for ABO blood groups. Molecular genotyping for the ABO locus was done by PCR-SSCP. Altered SSCP patterns were analysed by DNA sequencing. Sequencing of intron 6 and exons 1-5 was done in one sample each. RESULTS AND CONCLUSION Nine rare alleles affecting the normal expression of A and B antigens have been identified among Indians. They were two Aw06, one A209, one Ax20, two O05, one O49, one O56 and one O19 alleles. This is the first report demonstrating molecular studies on weaker variants of A and B from India.
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28
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Cai X, Jin S, Liu X, Fan L, Lu Q, Wang J, Shen W, Gong S, Qiu L, Xiang D. Molecular genetic analysis of ABO blood group variations reveals 29 novel ABO subgroup alleles. Transfusion 2013; 53:2910-6. [PMID: 23521133 DOI: 10.1111/trf.12168] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 01/02/2013] [Accepted: 01/23/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Identifying genetic variants of the ABO gene may reveal new biologic mechanisms underlying variant phenotypes of the ABO blood group. We report the molecular genetic analysis of 322 apparently unrelated ABO subgroup individuals in an estimated 2.1 million donors. STUDY DESIGN AND METHODS We performed phenotype investigations by serology studies, analyzed the DNA sequence of the ABO gene by direct sequencing or sequencing after cloning, and evaluated promoter activity by reporter assays. RESULTS In 62 rare ABO alleles, we identified 29 novel ABO subgroup alleles in 43 apparently unrelated subgroup individuals and their four available pedigrees. Of these alleles, one was a deletion-mutation allele, four were hybrid alleles, and 24 were point-mutation alleles. Most of the point mutations were detected in Exons 6 to 7, while several others were also detected in Exons 1 to 5 or splicing regions. One ABO promoter mutation, -35 to -18 del, was found and verified to reduce promoter activity, as determined by dual luciferase assays. Two mutations, 7G>T and 52C>T, carrying the premature terminal codons E3X and R18X in the 5'-region, were found to be associated with the very weak ABO subgroups "Ael" and "Bel." CONCLUSION Twenty-nine ABO subgroup alleles were newly linked to different kinds of ABO variations. We provide the first evidence that promoter abnormality is involved in the formation of weak ABO phenotypes. We also described the first naturally occurring ABO alleles with premature terminal codons in the 5'-region that led to Ael and Bel phenotypes.
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Affiliation(s)
- Xiaohong Cai
- Blood Group Reference Laboratory, Shanghai Institute of Blood Transfusion, Shanghai Blood Center; Blood Transfusion Department, Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China; Blood Group Laboratory, Tanggu Blood Center, Tianjin, China
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Tian L, Yao ZQ, Fan WC, Li H, Song N. A novelABOallele caused by an in-frame triplet deletion inABOgene. Vox Sang 2012; 103:362-3. [DOI: 10.1111/j.1423-0410.2012.01607.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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