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Shao LN, Yang YC, Xia YX, Li CX, Zhou SH, Liang XH. Novel missense mutation c.797T>C (p.Met266Thr) gives rise to the rare B(A) phenotype in a Chinese family. Vox Sang 2024; 119:383-387. [PMID: 38245843 DOI: 10.1111/vox.13591] [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: 12/05/2023] [Revised: 12/31/2023] [Accepted: 01/02/2024] [Indexed: 01/22/2024]
Abstract
BACKGROUND AND OBJECTIVES B(A) phenotype is usually formed by nucleotide mutations in the ABO*B.01 allele, with their products exhibiting glycosyltransferases (GTs) A and B overlapping functionality. We herein report a B(A) allele found in a Chinese family. MATERIALS AND METHODS The entire ABO genes of the probands, including flanking regulatory regions, were sequenced through PacBio third-generation long-read single-molecule real-time sequencing. 3D molecular models of the wild-type and mutant GTB were generated using the DynaMut web server. The effect of the mutation on the enzyme function was predicted by PROVEAN and PolyPhen2. The predictions of stability changes were performed using DynaMut and SNPeffect. RESULTS Based on serological and sequencing features, we concluded the two probands as possible cases of the B(A) phenotype. Crystallization analysis showed that Thr266 substitution does not disrupt the hydrogen bonds. However, some changes in interatomic contacts, such as loss of ionic interactions and hydrophobic contacts, and addition of weak hydrogen bonds, may have affected protein stability to some extent. This mutation was predicted to have a benign effect on enzyme function and slightly reduce protein stability. CONCLUSION The probands had the same novel B(A) allele with a c.797T>C (p.Met266Thr) mutation on the ABO*B.01 backbone.
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Affiliation(s)
| | | | - Yue-Xin Xia
- Dalian Blood Center, Dalian, Liaoning, China
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Wang J, Wang Y, Tan J, Tan B. Serological and molecular analysis of the B(A) subtype in China-A systematic review. Transfus Clin Biol 2023; 30:443-448. [PMID: 37414135 DOI: 10.1016/j.tracli.2023.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
OBJECTIVE To study the serological and molecular biological characteristics of the B(A) subtype and its geographical distribution in China through case discussion and systematic review. METHODS A case of the B(A)02 subtype previously found in our laboratory was retrospectively analysed. The distribution characteristics and specific serological and genotypic characteristics of the B(A) subtype in China were systematically evaluated by searching four major Chinese databases. RESULTS In a previous case of an abnormal blood group, both the proband and her father were found to be genotype B(A)02/O02, while the mother was normal type B. After a systematic search, irrelevant studies were screened out, and 88 studies were included for analysis. The results showed that the B(A)04 subtype was significantly more frequently reported in the north than in the south, while the B(A)02 subtype was predominant in the southwest. The A antigen of the B(A)02 subtype reacts with monoclonal anti-A reagents in a wide range, while the A antigen of the B(A)04 subtype has a weak agglutination intensity of less than or equal to 2+. CONCLUSION The results showed that the B(A) subtype has specific characteristics in the Chinese population, and this study further enriched the serological and molecular biological characteristics of the B(A) subtype.
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Affiliation(s)
- Jiang Wang
- Department of Transfusion Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Yuxin Wang
- Department of Transfusion Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Jinzhe Tan
- Department of Transfusion Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Bin Tan
- Department of Transfusion Medicine, West China Hospital of Sichuan University, Chengdu, China.
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Liu F, Li G, Li J, Gui R, Luo Y, Zhou M. A Novel Mutation Eliminates GATA-1 and RUNX1-Mediated Promoter Activity in Galactosyltransferase Gene. Transfus Med Hemother 2022; 49:331-337. [PMID: 36654980 PMCID: PMC9768290 DOI: 10.1159/000524632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 04/12/2022] [Indexed: 01/21/2023] Open
Abstract
Introduction Mutations in the promoter region and exons of ABO gene may cause changes in the expression of blood group antigens, often showing a weak ABO phenotype. Here, we identified a novel weak ABO subgroup allele that caused Bel phenotype and explored its mechanisms. Methods The ABO phenotype of subjects (Chinese Han nationality) was classified by serological method. The plasma activity of erythrocyte glycosyltransferase was detected by the phosphate coupling method. ABO subtype genotyping was performed by PCR-SSP and exon sequencing. The activity of the promoter was evaluated by a dual-luciferase reporter assay. Results We identified a mutation exon 1 c.15_16insTGTTG of the B allele in a Bel subject. Genealogical investigation showed that the mutation was inherited from her mother. The mutation was located in the promoter region of the ABO gene. The dual-luciferase reporter assay showed that the mutation inactivated GATA-1 and RUNX1-mediated activity of the ABO gene promoter, leading to a decrease in the expression and activity of B glycosyltransferase. Conclusion A novel Bvar ABO subgroup allele was identified. The novel mutation can reduce the promoter activity that activated by GATA-1 and RUNX1, subsequently causing the Bel phenotype.
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Affiliation(s)
- Fengxia Liu
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China,Cancer Research Institute, Central South University, Changsha, China
| | - Guocai Li
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China
| | - Jian Li
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China
| | - Rong Gui
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China
| | - Yanwei Luo
- Department of Blood Transfusion, Xiangya Third Hospital, Central South University, Changsha, China,*Yanwei Luo,
| | - Ming Zhou
- Cancer Research Institute, Central South University, Changsha, China,**Ming Zhou,
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Serology and gene sequence analysis of the B(A) subtype of Patients in Hunan. Transfus Apher Sci 2022; 61:103449. [DOI: 10.1016/j.transci.2022.103449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 04/04/2022] [Accepted: 04/08/2022] [Indexed: 11/18/2022]
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Bhasker PMB, Chandra A, Jain R, Kumar R, Srivastava S. A patient with probable rare blood Group B(A) phenotype. Asian J Transfus Sci 2022. [DOI: 10.4103/ajts.ajts_166_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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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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Saleh RM, Zefarina Z, Che Mat NF, Chambers GK, Edinur HA. Transfusion Medicine and Molecular Genetic Methods. Int J Prev Med 2018; 9:45. [PMID: 29899883 PMCID: PMC5981227 DOI: 10.4103/ijpvm.ijpvm_232_16] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 08/05/2017] [Indexed: 02/07/2023] Open
Abstract
Transfusion procedures are always complicated by potential genetic mismatching between donor and recipient. Compatibility is determined by several major antigens, such as the ABO and Rhesus blood groups. Matching for other blood groups (Kell, Kidd, Duffy, and MNS), human platelet antigens, and human leukocyte antigens (HLAs) also contributes toward the successful transfusion outcomes, especially in multitransfused or highly immunized patients. All these antigens of tissue identity are highly polymorphic and thus present great challenges for finding suitable donors for transfusion patients. The ABO blood group and HLA markers are also the determinants of transplant compatibility, and mismatched antigens will cause graft rejection or graft-versus-host disease. Thus, a single and comprehensive registry covering all of the significant transfusion and transplantation antigens is expected to become an important tool in providing an efficient service capable of delivering safe blood and quickly locating matching organs/stem cells. This review article is intended as an accessible guide for physicians who care for transfusion-dependent patients. In particular, it serves to introduce the new molecular screening methods together with the biology of these systems, which underlies the tests.
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Affiliation(s)
| | - Zulkafli Zefarina
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Nor Fazila Che Mat
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kelantan, Malaysia
| | | | - Hisham Atan Edinur
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kelantan, Malaysia
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Zhao H, Miao T, Yan F, Liu Y. The serological and genetic characterization of CisAB blood group in a Chinese family. Transfus Apher Sci 2015; 53:220-4. [PMID: 26143345 DOI: 10.1016/j.transci.2015.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/18/2015] [Accepted: 04/02/2015] [Indexed: 11/17/2022]
Abstract
BACKGROUND The rare CisAB blood genotype results in the inheritance of both the A and B blood types from a single parent. Several CisAB blood type phenotypes have been characterized that differ in their serological reactions and in the activities of the gene-encoded blood group A and B transferases. In this study, we conducted serological and genetic analyses of a Chinese family with four CisAB-carrying members. STUDY DESIGN AND METHODS A 10-year-old girl was suspected to have the CisAB blood type when forward blood typing indicated that she was blood type AB but reverse blood typing indicated that she was blood type A. An examination of this family identified that four of ten family members across three generations had a pattern of AB inheritance that could be explained only by the inheritance of the CisAB genotype. Blood samples from the family were tested serologically and genetically using PCR-SSP for the relevant CisAB alleles. The samples that were suitable for DNA analysis were sequenced for potential mutations. RESULTS Of the ten family members included in this study, four members showed mismatched forward and reverse blood grouping results, four members typed as blood group O and the remaining two members typed as blood group B. Among the four mismatched individuals, the propositus and her mother's mother were serologically typed as having the A2B3 phenotype. The propositus' mother and her mother's brother were typed as having the A2B phenotype, and had the genotypes CisAB01/O02 and CisAB01/B101, respectively. Further sequencing analysis of the four samples with the CisAB blood type revealed that a G(261) deletion occurred along with 297A>G, 467C>T, 646T>A, 681G>A, 771C>T, 803G>C and 829G>C substitutions in exons 6 and 7 of CisAB01/O02, while a 297A>G substitution occurred in exon 6 and 467C>T, 803G>C, 526C>G, 657C>T, 703G>A, 796C>A, 930G>A substitutions occurred in exon 7 of CisAB01/B101. CONCLUSION A family was identified in which 4/10 family members across three generations had inherited the CisAB blood group. Two of the CisAB genotypes were further identified as CisAB01/O02 and CisAB01/B101. The CisAB heterozygous alleles contributed to the different phenotypes that were observed.
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Affiliation(s)
- Hui Zhao
- Department of Blood Transfusion, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China; Department of Blood Transfusion, Beijing Tsinghua Changgung Hospital, Medical Center, Tsinghua University, Rd Middle, Haidian, Beijing, China
| | - Tianhong Miao
- Department of Hematology, Beijing Tiantan Hospital, Capital Medical University, No. 6, Tiantan Xili, Dongcheng District, Beijing 100050, China
| | - Fang Yan
- Department of Hematology, Beijing Tiantan Hospital, Capital Medical University, No. 6, Tiantan Xili, Dongcheng District, Beijing 100050, China
| | - Yuanbo Liu
- Department of Hematology, Beijing Tiantan Hospital, Capital Medical University, No. 6, Tiantan Xili, Dongcheng District, Beijing 100050, China.
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