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Xu G, Wang C, Wang J, Lin M, Chang Z, Liang J, Chen X, Zhong S, Nong X, Wei W, Deng Y. Prevalence and molecular characterization of common thalassemia among people of reproductive age in the border area of Guangxi-Yunnan-Guizhou province in Southwestern China. HEMATOLOGY (AMSTERDAM, NETHERLANDS) 2022; 27:672-683. [PMID: 35666669 DOI: 10.1080/16078454.2022.2080427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objectives: Thalassemia, the most common global monogenetic disorder, is highly prevalent in southern China. Epidemiological and molecular characterization of thalassemia is important for designing appropriate prevention strategies in high-risk areas, especially the border area of Guangxi-Yunnan-Guizhou province in southwestern China.Methods: We recruited 38812 reproductive age couples and screened them for thalassemia. Routine blood tests as well as hemoglobin components and levels were evaluated. In addition, suspected thalassemia were identified by gap polymerase chain reaction (Gap-PCR) and PCR-based reverse dot blot (PCR-RDB).Results: The overall prevalence of thalassemia was 26.76%. Specifically, incidences of α-thalassemia, β-thalassemia, and concurrent α- and β-thalassemia were 17.52%, 6.92%, and 2.32%, respectively. The diagnosed α-thalassemia anomalies were associated with six gene mutations and 25 genotypes. The β-thalassemia anomalies were associated with 12 gene mutations and 15 genotypes. Moreover, among the 1799 concurrent mutated α- and β-thalassemia genes, 95 different genotypes were identified. Couples in which both partners were positive for α-thalassemia and β-thalassemia isotypes were 8.80% and 2.08%, respectively. The proportion of couples at a risk of having children with thalassemia major or intermedia was high.Conclusions: This study elucidates on the prevalence and molecular characterization of thalassemia in the border area of Guangxi-Yunnan-Guizhou provinces. These findings provide valuable baseline data for genetic counseling and prenatal diagnosis, with the overarching goal of preventing and controlling severe thalassemia.
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Affiliation(s)
- GuiDan Xu
- Department of Laboratory Center, The First Affiliated Hospital of Jinan University, Guangzhou, People's Republic of China.,Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - ChunFang Wang
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - JunLi Wang
- Department of Laboratory Center, The First Affiliated Hospital of Jinan University, Guangzhou, People's Republic of China.,Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - Min Lin
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - ZhengYi Chang
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - JuHua Liang
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - XiaoHao Chen
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - ShiMao Zhong
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - XueJuan Nong
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - WuJun Wei
- Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
| | - YiBin Deng
- Department of Laboratory Center, The First Affiliated Hospital of Jinan University, Guangzhou, People's Republic of China.,Department of Laboratory Center, The Affiliated Hospital of YouJiang Medical University for Nationalities, Baise, People's Republic of China
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Pang W, Long J, Weng X, Fan Q, Sun L, Pan Z, Fan Z. Identification of Three Types of α-Thalassemia Deletion, -α 21.9, -α 2.4, and - - THAI, and Their Frequencies, in One Family in the Population of Southern Guangxi Zhuang Autonomous Region, People's Republic of China. Hemoglobin 2018; 42:37-42. [PMID: 29447013 DOI: 10.1080/03630269.2018.1428618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Different types of deletional α-thalassemia (α-thal) have been reported by researchers in China. This study describes one family carrying -α21.9 (NG_000006.1: g.14373_36299delinsGGGAAGGGTGGGTGGGAATAACAGCTTTT), -α2.4 (NG_000006.1: g.36860_39251del) and - -THAI (Thailand) (NG_000006.1: g.10664_44164del) alleles in Guangxi Zhuang Autonomous Region, People's Republic of China (PRC), and reports the frequencies of these types in the population of this region. The proband was a 4-year-old girl, who screened positive for thalassemia, although the thalassemia genotype results were normal when screened using the routine kits. Samples of the proband's parents were also collected to perform further analyses. Two real-time gap-polymerase chain reaction (gap-PCR) systems were designed for separate detection of - -THAI and screening for -α21.9 and -α2.4. The genotype of the proband was -α21.9/-α2.4, and the two variants were inherited from her parents. In the frequency study, five - -THAI, four -α21.9 and 11 -α2.4 positive individuals were detected in the 3410 random samples. Thus, allele frequencies of -α21.9, - -THAI and -α2.4 in the population of southern Guangxi were determined as 0.059, 0.073 and 0.161%, respectively. This is the first report of an individual carrying the -α21.9/-α2.4 genotype, and the first report of the detection of -α21.9, -α2.4 and - -THAI in a single family. The total frequency for these alleles was 0.293% in southern Guangxi, suggesting that the thalassemia clinical center in this region should utilize a screening kit that allows detection of these types of deletions for a more comprehensive evaluation of thalassemia risk.
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Affiliation(s)
- Wanrong Pang
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
| | - Ju Long
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
| | - Xunjin Weng
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
| | - Qiongying Fan
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
| | - Lei Sun
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
| | - Zhijian Pan
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
| | - Zuqian Fan
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi Zhuang Autonomous Region , People's Republic of China
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Huang G, Zheng YW, Wang JJ, Wu J, Liu SN. [Identification of a new 3.8kb deletional α thalassemia and detection of the deletion fragment]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:997-1000. [PMID: 28736383 PMCID: PMC6765508 DOI: 10.3969/j.issn.1673-4254.2017.07.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To report the identification of a novel 3.8-kb deletion that caused α thalassemia and establish the method for detecting the deletion fragment. METHODS Peripheral blood samples were collected from the proband and his mother for analysis of the hematological parameters and routine test for thalassemia genes. For the sample with an inconsistency between the genotyping results and phenotypic analysis results, a specific gap-PCR was employed to identify the rare or novel mutations. RESULTS A novel 3814-bp deletion causing α thalassemia was found in the proband and his mother, who had genotypes of -α4.2/-α3.8 and αα/-α3.8, respectively. CONCLUSION We identified a 3.8-kb deletion in the α-globin gene cluster that caused α thalassemia, and this finding enriches the α thalassemia gene mutation spectrum. Specific gap-PCR offers a convenient and efficient means for for detecting this deletion fragment.
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Affiliation(s)
- Ge Huang
- Department of Clinical Laboratory, Guangdong General Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China.E-mail:
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Chen B, Lin L, Yi S, Chen Q, Wei H, Li G, Zheng C, He S, Qiu X. A Novel Mutation of the α2-Globin Gene Causing α +-Thalassemia: Hb Nanning (HBA2: c.369_370delinsGA). Hemoglobin 2017; 41:56-58. [PMID: 28395547 DOI: 10.1080/03630269.2017.1302950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
We report a novel mutation on the α2-globin gene, Hb Nanning (HBA2:c.369_370delinsGA) detected in a Chinese family. This mutation gives rise to a previously undescribed hemoglobin (Hb) variant that was undetectable by various separation techniques. Both carriers of the mutation have mean corpuscular volume (MCV) and mean corpuscular Hb (MCH) values that are below normal, as would be predicted for an α+-thalassemia (α+-thal) patient.
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Affiliation(s)
- Biyan Chen
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - Li Lin
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - Shang Yi
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - Qiuli Chen
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - Hongwei Wei
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - Guojian Li
- b Research Department , Guangxi Zhuang Autonomous Region Health and Family Planning Commission , Nanning , People's Republic of China
| | - Chenguang Zheng
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - Sheng He
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
| | - XiaoXia Qiu
- a Prenatal Diagnosis Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , People's Republic of China
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Pang W, Sun L, Long J, Weng X, Ye X, Wang J, Liao Y, Tang W, Fan Z, Wu S, Song C, Wei X, Zhang C. Identification of the -α(2.4) Deletion in One Family and in One Hb H Disease Patient in Guangxi, People's Republic of China. Hemoglobin 2016; 40:194-7. [PMID: 26984456 DOI: 10.3109/03630269.2016.1153486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The 2.4 kb (or -α(2.4)) deletion in the α-globin gene cluster (NG_000006.1) is an α(+)-thalassemia (α(+)-thal) allele. The molecular basis of -α(2.4) is a deletion from 36860 to 39251 of the α-globin gene cluster. It was reported by three research groups in 2005, 2012 and 2014, respectively. In routine thalassemia screening studies by this research group, we found an individual with the -α(2.4)/αα genotype and an Hb H (β4) disease patient whose genotype was - -(SEA)/-α(2.4). Samples from the parents of the carrier of the -α(2.4)/αα genotype were collected to perform pedigree analysis, and the proband's mother's genotype was diagnosed to be - -(SEA)/-α(2.4). The research revealed that the -α(2.4) allele exists in the population of southern Guangxi, People's Republic of China.
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Affiliation(s)
- Wanrong Pang
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Lei Sun
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi , People's Republic of China
| | - Ju Long
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi , People's Republic of China.,c College of Ocean, Qinzhou University , Qinzhou , Guangxi , People's Republic of China and
| | - Xunjin Weng
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China.,b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi , People's Republic of China
| | - Xuehe Ye
- b Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases , Qinzhou , Guangxi , People's Republic of China.,d Department of Endocrinology , The First People's Hospital of Qinzhou , Qinzhou , Guangxi , People's Republic of China
| | - Junjie Wang
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Yan Liao
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Weijun Tang
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Zuqian Fan
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Suping Wu
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Chuanlu Song
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Xiaoying Wei
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
| | - Chenghong Zhang
- a Laboratory of Medical Genetics , Qinzhou Maternal and Child Health Care Hospital , Qinzhou , Guangxi , People's Republic of China
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Pang W, Weng X, Ye X, Long J, Wu S, Sun L, Wei C, Chen M, Tang W, Qiu S, Zhang C. Identification of a variation in the IVSII of α2 gene and its frequency in the population of Guangxi. Gene 2016; 583:24-8. [PMID: 26930363 DOI: 10.1016/j.gene.2016.02.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 02/05/2016] [Accepted: 02/27/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVE During thalassemia screening, a previously unidentified α2 gene variation in α-globin gene cluster was isolated. This variation was distinct from other variations known to confer thalassemia as assessed by conventional thalassemia genotype analysis. Because the sample in the thalassemia screening was positive (MCV=83.6fL, MCH=26.1pg/cell, Hb=11.3g/dL), further analysis was required. MATERIAL AND METHODS MLPA (multiplex ligation-dependent probe amplification) and sequencing were used for analysis, and a qPCR system was designed for the frequency study. RESULTS The MLPA result showed that there was a mutation or small fragment deletions between 34247 (160bp probe) and 34618 (196bp probe) in α-globin gene cluster (NG_000006.1). Through sequencing, this variation was identified as HBA2: c.301-24delGinsCTCGGCCC. The gene polymorphisms similar to HBA2:c.301-24delGinsCTCGGCCC are α121 and α212. Since α212 is unrelated to microcytosis, and the structure of HBA2: c.301-24delGinsCTCGGCCC is similar to α212, this change is more appropriately considered as a polymorphism. The allele frequency of HBA2: c.301-24delGinsCTCGGCCC is 0.184% in this region. CONCLUSIONS There is a certain ratio for HBA2:c.301-24delGinsCTCGGCCC carriers among the Chinese population. The HBA2:c.301-24delGinsCTCGGCCC variant results in an abnormal result from MLPA analysis. Investigators performing thalassemia screening in Guangxi region should be aware of the HBA2:c.301-24delGinsCTCGGCCC variant to avoid misinterpretation of the MLPA results.
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Affiliation(s)
- Wanrong Pang
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China
| | - Xunjin Weng
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China; Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases, Qinzhou, Guangxi 535099, PR China
| | - Xuehe Ye
- Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases, Qinzhou, Guangxi 535099, PR China; The First People's Hospital of Qinzhou, Qinzhou, Guangxi 535099, PR China
| | - Ju Long
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China; Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases, Qinzhou, Guangxi 535099, PR China; Qinzhou University, Qinzhou, Guangxi 535099, PR China.
| | - Suping Wu
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China
| | - Lei Sun
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China; Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases, Qinzhou, Guangxi 535099, PR China
| | - Chunyan Wei
- Qinbei Maternal and Child Health Care Hospital of Qinzhou, Qinzhou, Guangxi 535099, PR China
| | - Mingli Chen
- Institute of Agro-Products Processing and Nuclear-Agricultural Technology, Hubei Academy of Agricultural Sciences, Wuhan, Hubei 430064, PR China
| | - Weijun Tang
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China
| | - Shengying Qiu
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China
| | - Chenghong Zhang
- Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China
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