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Qin D, Wang J, Yao C, Bao X, Liang J, Du L. Hb Q-Thailand heterozygosity unlinked with the (-α 4.2/) α +-thalassemia deletion allele identified by long-read SMRT sequencing: hematological and molecular analyses. Hematology 2023; 28:2184118. [PMID: 36867091 DOI: 10.1080/16078454.2023.2184118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
OBJECTIVE In the present study, two unrelated cases of Hb Q-Thailand heterozygosity unlinked with the (-α4.2/) α+-thalassemia deletion allele were identified by long-read single molecule real-time (SMRT) sequencing in southern China. The aim of this study was to report the hematological and molecular features as well as diagnostic aspects of the rare manifestation. METHODS Hematological parameters and hemoglobin analysis results were recorded. A suspension array system for routine thalassemia genetic analysis and long-read SMRT sequencing were applied in parallel for thalassemia genotyping. Traditional methods, including Sanger sequencing, multiplex gap-polymerase chain reaction (gap-PCR) and multiplex ligation-dependent probe amplification (MLPA), were used together to confirm the thalassemia variants. RESULTS Long-read SMRT sequencing was used to diagnose two Hb Q-Thailand heterozygous patients for whom the hemoglobin variant was unlinked to the (-α4.2/) allele for the first time. The hitherto undescribed genotypes were verified by traditional methods. Hematological parameters were compared with those of Hb Q-Thailand heterozygosity linked with the (-α4.2/) deletion allele in our study. For the positive control samples, long-read SMRT sequencing revealed a linkage relationship between the Hb Q-Thailand allele and the (-α4.2/) deletion allele. CONCLUSIONS Identification of the two patients confirms that the linkage relationship between the Hb Q-Thailand allele and the (-α4.2/) deletion allele is a common possibility but not a certainty. Remarkably, as it is superior to traditional methods, SMRT technology may eventually serve as a more comprehensive and precise method that holds promising prospects in clinical practice, especially for rare variants.
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Affiliation(s)
- Danqing Qin
- Medical Genetics Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Jicheng Wang
- Medical Genetics Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Cuize Yao
- Medical Genetics Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Xiuqin Bao
- Medical Genetics Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Jie Liang
- Medical Genetics Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Li Du
- Medical Genetics Center, Guangdong Women and Children Hospital, Guangzhou, Guangdong, People's Republic of China
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Panyasai S, Khongthai K, Satthakarn S. Hemoglobin profile and molecular characteristics of the complex interaction of hemoglobin Doi-Saket [α9(A7) asn > lys, HBA2:c.30C > a], a novel α2α1 hybrid globin variant, with hemoglobin E [β26(B8) Glu > lys, HBB:c.79G > A] and deletional α +-thalassemia in a Thai family. Ann Med 2023; 55:2264174. [PMID: 37796611 PMCID: PMC10557546 DOI: 10.1080/07853890.2023.2264174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 09/22/2023] [Indexed: 10/07/2023] Open
Abstract
BACKGROUND An increasing number of α-hemoglobin (Hb) variants is causing various clinical symptoms; therefore, accurate identification of these Hb variants is important. OBJECTIVE This study aimed to describe the molecular and hematological characteristics of novel Hb Doi-Saket that gives rise to a typical α+-thalassemia phenotype in carriers with and without other hemoglobinopathies. MATERIALS AND METHODS Biological samples from a proband and his family members were analyzed. Hematological profiles were analyzed using a standard automated cell counter. Hb was analyzed by capillary electrophoresis and high-performance liquid chromatography. Mutations and globin haplotype were identified by DNA analysis. Novel diagnostic tools based on allele-specific polymerase chain reaction (PCR) and PCR-restriction fragment length polymorphism were developed. RESULTS Hb analysis showed a major abnormal Hb fraction, moving slower than HbA, and a minor Hb fraction alongside HbA2 in the proband, his father, and son. DNA analysis of the α-globin gene identified the -α3.7 deletion and in cis the C > A mutation on codon 9 of the α2α1 gene, corresponding to Hb Doi-Saket [α9(A7) Asn > Lys]. This mutation could be identified using newly developed allele-specific PCR-based assays. The Hb Doi-Saket al.lele was significantly associated with haplotype [- + M + + 0 -]. Interaction of αDoi-Saket with βE globin chains led to a new Hb variant (HbE Doi-Saket). Phenotypic expression was clinically silent in heterozygotes and might present slight microcytosis. CONCLUSIONS Hb Doi-Saket emphasizes a great diversity present in α-globin gene. The mutation in this family from Thailand was linked to -α3.7 and caused mild microcytosis in the carriers. The combination of this variant with deletions in α genes might cause a severe clinical phenotype. Different methods of separation can provide useful information in diagnosis, and a complete molecular approach is needed for confirmation before considering patient management.
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Affiliation(s)
- Sitthichai Panyasai
- Department of Medical Technology, School of Allied Health Sciences, University of Phayao, Phayao, Thailand
| | | | - Surada Satthakarn
- Department of Medical Technology, School of Allied Health Sciences, University of Phayao, Phayao, Thailand
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3
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Li THS, Li CH, Wong WS. Haemoglobin analysis of a newborn with haemoglobin Q-H disease. Pathology 2023; 55:412-414. [PMID: 36372593 DOI: 10.1016/j.pathol.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/21/2022] [Accepted: 08/01/2022] [Indexed: 11/05/2022]
Affiliation(s)
| | - Chak Ho Li
- Department of Department of Paediatrics and Adolescent Medicine, Tuen Mun Hospital, Hong Kong
| | - Wai Shan Wong
- Department of Pathology, Queen Elizabeth Hospital, Hong Kong
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4
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Panjawatanan P, Charoenkwan P, Tantiworawit A, Strogatz D, Perry KE, Tuntiwechapikul W. Telomere shortening correlates with disease severity in hemoglobin H disease patients. Blood Cells Mol Dis 2021; 89:102563. [PMID: 33798832 DOI: 10.1016/j.bcmd.2021.102563] [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: 11/23/2020] [Revised: 03/16/2021] [Accepted: 03/19/2021] [Indexed: 10/21/2022]
Abstract
Hemoglobin H (Hb H) disease is the most significant health problem of the α-thalassemia syndromes. The Hb disease patients are categorized based on their genotype to deletional and nondeletional, with the latter genotype presents the more severe clinical symptoms. Since telomere length is an indicator of biological aging and health, we hypothesized that telomere length could reflect Hb H disease's severity. In this study, we recruited 48 deletional and 47 nondeletional Hb H disease patients, along with 109 normal controls, for telomere length assessment. The leukocyte telomere length was assessed by monochromatic multiplex real-time PCR and reported as the telomere to single-copy gene (T/S) ratio. When telomere length was adjusted for age, the analysis of covariance between the control and the two Hb H disease groups revealed no significant difference. However, the telomere shortening rate was more rapid in the nondeletional Hb H disease group than those of the control and deletional Hb H disease groups. Gender analysis found that male patients have a significantly lower T/S ratio than females in the nondeletional group but not in the control and deletional groups. In the two disease groups, the T/S ratio was not influenced by ferritin level or transfusion burden but was positively correlated with the absolute reticulocyte count.
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Affiliation(s)
- Panadeekarn Panjawatanan
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; Department of Internal Medicine, Bassett Medical Center, Cooperstown, NY, USA
| | - Pimlak Charoenkwan
- Division of Hematology and Oncology, Department of Pediatrics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Adisak Tantiworawit
- Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | | | - Kelly E Perry
- Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Wirote Tuntiwechapikul
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
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Panyasai S, Pornprasert S. Association of Hb A 2 Variants with Several Forms of α- and β-Thalassemia in Thailand. Hemoglobin 2020; 44:179-183. [PMID: 32482156 DOI: 10.1080/03630269.2020.1770099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In this study, Hb A2 variants and their association with α- and β-thalassemia (α- and β-thal) were analyzed. We performed molecular analyses to identify α-thal [- -SEA (Southeast Asian), - -THAI (Thai), -α3.7 (rightward) and -α4.2 (leftward)] deletions, and Hb Constant Spring (Hb CS; HBA2: c.427T>C), Hb A2-Melbourne (HBD: c.130G>A), Hb A2' (HBD: c.49G>C), Hb A2-Lampang (HBD: c.142G>A). β0-Thalassemia mutations included codon 17 (A>T) (HBB: c.52A>T), codons 41/42 (-TCTT) (HBB: c.126_129delCTTT), codons 71/72 (+A) (HBB: c.216_217insA) and IVS-I-1 (G>T) (HBB: c.92+1G>T) in 23 samples which had a Hb A2 variant peak in zone 1 of the capillary electrophoresis (CE) electropherogram. Results showed that 20 patients (87.0%) carried Hb A2-Melbourne with seven different genotypes for α- and β-thal, two (8.7%) carried Hb A2' and one (4.3%) carried Hb A2-Lampang. All three samples doubly heterozygous for Hb A2-Melbourne/β0-thal had Hb A2 levels lower than 4.0%, while summation of Hb A2 and Hb A2-Melbourne ranged from 4.9-5.3%, reaching the accepted range (4.0-10.0%) for β-thal trait. Hb A2-Melbourne is the most common δ-globin variant in the Thai population. Hb A2 variant and Hb A2 levels must be combined in order to diagnose carriers of β-thal. β-Globin haplotype analysis showed an association with a single β-globin haplotype [+ - - - - + +] of Hb A2-Melbourne, Hb A2' and Hb A2-Lampang, indicating that they were of the same origin. We developed a multiplex allele-specific polymerase chain reaction (ASPCR) for simultaneous detection of these three Hb A2 variants.
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Affiliation(s)
- Sitthichai Panyasai
- Department of Medical Technology, School of Allied Health Sciences, University of Phayao, Phayao, Thailand
| | - Sakorn Pornprasert
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
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6
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Harrison A, Mashon RS, Kakkar N, Das S. Clinico-Hematological Profile of Hb Q India: An Uncommon Hemoglobin Variant. Indian J Hematol Blood Transfus 2017; 34:299-303. [PMID: 29622873 DOI: 10.1007/s12288-017-0864-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/08/2017] [Indexed: 11/29/2022] Open
Abstract
Inherited hemoglobin disorders include thalassemias and structural variants like HbS, HbE, and HbD, Hb Lepore, HbD-Iran, Hb-H disease and HbQ India. HbQ India is an uncommon alpha-chain structural hemoglobin variant seen in North and West India. Patients are mostly asymptomatic and often present in the heterozygous state or co-inherited with beta-thalassaemia. This study was done in a tertiary care teaching hospital in North India over a period of 7 years among patients referred from antenatal and other clinics for screening of hemoglobin disorders. Complete blood count, peripheral blood smear examination and cation exchange high performance liquid chromatography (HPLC) was done to quantify various hemoglobins. HbQ India was diagnosed if the unknown variant hemoglobin was detected within the characteristic retention window. Of a total of 7530 patients screened, 31 (0.4%) were detected to have HbQ India. Of these, 25 (0.3%) patients had HbQ India trait and 6 (0.1%) patients had compound heterozygosity for HbQ India and Beta Thalassemia trait (HbQ India-BTT). All patients were clinically asymptomatic and were detected as part of the screening for hemoglobin disorders. Only two patients with HbQ India-BTT had hemoglobin less than 10 g/dL. In 25 patients with HbQ India trait, HbQ ranged from 13.6 to 24.4% and in 6 patients with HbQ India-BTT, HbQ India ranged from 7.4 to 9.0%. HbQ India is an uncommon structural hemoglobin variant. Although asymptomatic, it may cause diagnostic difficulty in the compound heterozygous state with beta thalassemia. HPLC provides a rapid, accurate and reproducible method for screening of this condition to identify and counsel individuals.
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Affiliation(s)
- Aradhana Harrison
- 1Department of Pathology, Christian Medical College & Hospital, Brown Road, Ludhiana, Punjab 141008 India
| | - Ranjeet Singh Mashon
- 1Department of Pathology, Christian Medical College & Hospital, Brown Road, Ludhiana, Punjab 141008 India
| | - Naveen Kakkar
- 1Department of Pathology, Christian Medical College & Hospital, Brown Road, Ludhiana, Punjab 141008 India
| | - Sheila Das
- 2HOD Hematopathology Section, Believers Church Medical College Hospital, St. Thomas Nagar, Kuttapuzha, Pathanamthitta, Thiruvalla, Kerala India
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7
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Jiang F, Zhou JY, Yan JM, Lu YC, Li DZ. First Report of a Chinese Family Carrying a Double Heterozygosity for Hb Q-Thailand and Hb J-Bangkok. Hemoglobin 2017; 40:425-427. [PMID: 28361593 DOI: 10.1080/03630269.2016.1274660] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The double heterozygosity for α and β chain variants leads to the formation of abnormal heterodimer hybrids, which could render laboratory diagnostics in a routine setting difficult. The following is the first report of a double heterozygosity for Hb Q-Thailand [α74(EF3)Asp→His; HBA1: c.223G>C] with α+-thalassemia (α+-thal) and Hb J-Bangkok [β56(D7)Gly→Asp; HBB: c.170G>A] found in a Chinese family. Both subjects were healthy with normal or borderline hematological parameters. Hemoglobin (Hb) analyses showed a novel variant, Hb Q-Thailand and Hb J-Bangkok. Family studies helped in the initial recognition and in making presumptive diagnoses, but definitive diagnoses of these cases with complex α and β chain variants could only be obtained after DNA analysis.
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Affiliation(s)
- Fan Jiang
- a Prenatal Diagnostic Center , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China.,b Department of Obstetrics and Gynecology , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China
| | - Jian-Ying Zhou
- a Prenatal Diagnostic Center , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China.,b Department of Obstetrics and Gynecology , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China
| | - Jin-Mei Yan
- a Prenatal Diagnostic Center , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China.,b Department of Obstetrics and Gynecology , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China
| | - Yue-Cheng Lu
- a Prenatal Diagnostic Center , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China.,b Department of Obstetrics and Gynecology , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China
| | - Dong-Zhi Li
- a Prenatal Diagnostic Center , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China.,b Department of Obstetrics and Gynecology , Guangzhou Women and Children Medical Center, Guangzhou Medical University , Guangzhou , Guangdong , People's Republic of China
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8
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He S, Qin Q, Lin L, Chen Q, Yi S, Wei H, Du J, Zheng C, Qiu X, Chen B. Complex Interaction of Hb Q-Thailand with α 0- and β 0-Thalassemia in a Chinese Family. Hemoglobin 2017; 41:68-72. [PMID: 28475397 DOI: 10.1080/03630269.2017.1295985] [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: 10/20/2022]
Abstract
Hb Q-Thailand [α74(EF3)Asp→His (α1); HBA1: c.223 G>C] is an abnormal hemoglobin (Hb), variant found mainly in China and Southeast Asian countries. The association of the αQ-Thailand allele with other globin gene disorders has important implications in diagnosis. Here, we report a hitherto undescribed condition of patients with a double heterozygosity for Hb Q-Thailand with α0-thalassemia (α0-thal) and in combination with β0-thalassemia (β0-thal) in a Chinese family. Our study will provide some clinical manifestations, laboratory diagnosis and genetic counseling for complex hemoglobinopathies.
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Affiliation(s)
- Sheng He
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Qian Qin
- b Prenatal Diagnostic Center , Baise Women and Children Care Hospital , Baise , Guangxi , People's Republic of China
| | - Li Lin
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Qiuli Chen
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Shang Yi
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Honhwei Wei
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Juan Du
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Chenguang Zheng
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Xiaoxia Qiu
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
| | - Biyan Chen
- a Prenatal Diagnostic Center , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi , People's Republic of China
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Panyasai S, Fucharoen G, Fucharoen S. Hemoglobin Variants in Northern Thailand: Prevalence, Heterogeneity and Molecular Characteristics. Genet Test Mol Biomarkers 2016; 20:37-43. [DOI: 10.1089/gtmb.2015.0182] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sitthichai Panyasai
- Biomedical Science Program, Graduate School, Khon Kaen University, Khon Kaen, Thailand
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Goonnapa Fucharoen
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Supan Fucharoen
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
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10
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Pornprasert S, Punyamung M. Detection of compound heterozygous of hb constant spring and hb q-Thailand by capillary electrophoresis and high performance liquid chromatography. Indian J Hematol Blood Transfus 2015; 31:229-32. [PMID: 25825563 DOI: 10.1007/s12288-014-0411-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 05/22/2014] [Indexed: 11/30/2022] Open
Abstract
A capillary electrophoresis (CE) has proven to be superior to a high performance liquid chromatography (HPLC) in the detection of hemoglobin Constant Spring (Hb CS). Thus the aim of this study was to analyze the efficacy of CE and HPLC for the detection of Hb CS in samples with compound heterozygous of Hb CS and Hb Q-Thailand. Hemoglobin analysis was performed in blood samples of 2 patients with compound heterozygous of Hb CS and Hb Q-Thailand by using HPLC and CE. The HPLC chromatogram and CE electrophoregram of the two techniques were compared. Hb CS was not found on HPLC chromatogram while Hb QA2 (α2 (QT)δ2), a derivative of Hb Q-Thailand, was presented at the retention time of 4.70-4.80 min and it was close to the retention time of Hb CS. On CE electrophoregram, Hb CS was presented at zone 2 (Z2) and it was distinctly separated from Hb QA2 which was presented at Z1. Therefore, CE was more efficient to the HPLC for diagnosis of compound heterozygous of Hb CS and Hb Q-Thailand.
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Affiliation(s)
- Sakorn Pornprasert
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, 110 Intawaroros Road, Chiang Mai, 50200 Thailand
| | - Manoo Punyamung
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, 110 Intawaroros Road, Chiang Mai, 50200 Thailand
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Lubrano L, Donnelly MJ, Sandler G, Hoyer JD, Swanson KC, Dawson DB, Oliveira JL. Hb Memphis [HBA2: c.70G>C (orHBA1)] in a Turkish Child: A Case Report and Comparison to Hb Q-Thailand (HBA1: c.223G>C). Hemoglobin 2014; 38:137-41. [DOI: 10.3109/03630269.2013.867866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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12
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Singsanan S, Karnpean R, Fucharoen G, Sanchaisuriya K, Sae-Ung N, Fucharoen S. Hemoglobin Q-Thailand related disorders: origin, molecular, hematological and diagnostic aspects. Blood Cells Mol Dis 2010; 45:210-4. [PMID: 20615730 DOI: 10.1016/j.bcmd.2010.06.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 05/31/2010] [Indexed: 11/15/2022]
Abstract
We describe the molecular and hematological profiles of thalassemia syndromes caused by interactions of hemoglobin (Hb) Q-Thailand [α74(EF3) Asp-His] and various hemoglobinopathies found in 52 unrelated adult Thai subjects. Ten genotypes including several previously undescribed conditions were observed, which were classified into 4 groups. Group I included 26 Hb Q-Thailand heterozygotes and a homozygotous subject. Group II included subjects with Hb Q-Thailand and other α-thalassemia alleles in trans including 1 compound Hb Q-Thailand/α(+)-thalassemia (-α(3.7)), 2 Hb Q-Thailand/Hb Constant Spring disease and 6 Hb H/Q-Thailand disease. The average levels of Hb Q-Thailand were found to be 29.8%, 82.3%, 34.7%, 49.2-49.3% and 79.4%, respectively. Both Hbs Bart's and H were observed in addition to Hb Q-Thailand in all 6 cases with Hb Q-H disease but not in a homozygous Hb Q-Thailand. Group III included 7 double heterozygotes for Hb Q-Thailand/Hb E, 3 Hb Q-Thailand/Hb E/α(+)-thalassemia (-α(3.7)), 3 heterozygous Hb Q-Thailand/homozygous Hb E and 1 triple heterozygote for Hb Q-Thailand/Hb Constant Spring/Hb E. In this group, Hbs E (α(A)(2)β(E)(2)), Q-Thailand (α(QT)(2)β(A)(2)) and QE (α(QT)(2)β(E)(2)) were observed on both HPLC and capillary electrophoresis. The Hb QE, rather than Hb Q-Thailand, was detected in all 3 cases with heterozygous Hb Q-Thailand and homozygous Hb E. The remaining two cases in group 4 were double heterozygotes for Hb Q-Thailand and β(0)-thalassemia in which Hb Q-Thailand, elevated Hb A(2) (α(A)(2)δ(2)), and Hb QA(2) (α(QT)(2)δ(2)) were detected. DNA analysis identified the Hb Q-Thailand mutation (α74: GAC-CAC) and the linked (-α(4.2)) in all cases. Analysis of α-globin gene haplotype provided the first evidence of a single origin of this Hb variant in Thai population.
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Affiliation(s)
- Sanita Singsanan
- The Graduate School, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
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13
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Zheng W, Liu Y, Chen D, Rong K, Ge Y, Gong C, Chen H. Complex interaction of Hb Q-Thailand and Hb E with α0-thalassemia and hereditary persistence of fetal hemoglobin in a Chinese family. Ann Hematol 2010; 89:883-8. [DOI: 10.1007/s00277-010-0935-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Accepted: 02/25/2010] [Indexed: 11/29/2022]
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14
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Li D, Liao C, Li J, Xie X, Zhong H. Association of Hb Q-Thailand with Heterozygous Hb E in a Chinese Patient. Hemoglobin 2009; 32:319-21. [DOI: 10.1080/03630260802004483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Abstract
Four Chinese patients with Hb Q-H disease were identified during thalassemia screening. The main hematological characteristics of Hb Q-H disease are that Hb A is absent, and Hb Q-Thailand (also known as G-Taichung, Mahidol, Kurashiki-I and Asabara) accounts for the majority of the total hemoglobin (Hb). The phenotype of this disorder is similar to that of deletional Hb H (beta4) disease.
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Affiliation(s)
- Dongzhi Li
- Prenatal Diagnostic Center, Guangzhou Maternal & Neonatal Hospital, Guangzhou Medical College, Guangzhou, Guangdong, PR China.
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16
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Hb Q-H disease: two cases in a Cantonese family. Blood Cells Mol Dis 2008; 41:259-60. [PMID: 18653359 DOI: 10.1016/j.bcmd.2008.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Accepted: 06/16/2008] [Indexed: 11/21/2022]
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Chan AYY, So CC, Ma ESK, Chan LC. A laboratory strategy for genotyping haemoglobin H disease in the Chinese. J Clin Pathol 2006; 60:931-4. [PMID: 17018682 PMCID: PMC1994485 DOI: 10.1136/jcp.2006.042242] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The thalassaemias are the commonest blood disorders worldwide, with South East Asia and southern China as areas of high prevalence. Accurate diagnosis of these disorders helps in clinical management with improved outcome. METHODS The alpha-globin genotypes of 100 Chinese patients in Hong Kong with haemoglobin H (Hb H) disease were characterised. Single-tube multiplex gap-PCR was used to detect --(SEA), -alpha(3.7) and -alpha(4.2), while Hb CS, Hb QS and codon 30 (DeltaGAG) were identified by single-tube multiplex amplification refractory mutation system (ARMS). Automated direct nucleotide sequencing of the amplified alpha2- and alpha1-globin genes was performed to characterise other non-deletional alpha-thalassaemia determinants. RESULTS In the 100 cases studied, 99 cases had --(SEA) in combination with deletional alpha(+)-thalassaemia or non-deletional alpha-globin gene mutation involving the alpha2-globin gene. In 70 cases of the deletional form, 43 cases showed the genotype of (--(SEA)/-alpha(3.7)) and 27 cases of (--(SEA)/-alpha(4.2)). Three of the 27 cases of (--(SEA)/-alpha(4.2)) were found to have Hb Q-Thailand linked in-cis with -alpha(4.2). The remaining 30 cases were of non-deletional form with the following genotypes: 11 cases of (--(SEA)/alpha(HbCS)alpha), 9 cases of (--(SEA)/alpha(HbQS)alpha), 3 cases of (--(SEA)/alpha(cd30 (DeltaGAG))alpha), 3 cases of (--(SEA)/alpha(cd31)alpha), 2 cases of (--(SEA)/alpha(poly-A)alpha), 1 case of (--(SEA)/alpha(HbWestmead)alpha) and 1 case of (--(non-SEA)/alpha(HbQS)alpha). CONCLUSIONS Based on two rapid diagnostic tests, multiplex gap-PCR and multiplex ARMS, more than 90% of the cases were genetically characterised. This laboratory strategy should be widely applicable for genetic diagnosis of alpha-thalassaemia.
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Affiliation(s)
- Amy Yuk-Yin Chan
- Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, People's Republic of China.
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Sanchaisuriya K, Chunpanich S, Fucharoen S, Fucharoen G, Sanchaisuriya P, Changtrakun Y. Association of Hb Q-Thailand with homozygous Hb E and heterozygous Hb Constant Spring in pregnancy. Eur J Haematol 2005; 74:221-7. [PMID: 15693792 DOI: 10.1111/j.1600-0609.2004.00381.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hemoglobin (Hb) Q-Thailand [alpha74(EF3): Asp-->His] is an abnormal Hb found mainly in China and South-east Asian countries. Association of the alpha(Q-Thailand) allele with alpha-thalassemia has important implications in diagnosis. We report the hitherto undescribed conditions of this variant in two unrelated pregnant Thai women. Routine Hb analyses using high-performance liquid chromatography identified abnormal Hb migrating after Hb A(2) in addition to a homozygous Hb E in the proband 1 and to a heterozygous Hb Constant Spring (Hb CS) in the proband 2. Further alpha-globin gene analysis identified that the variant was caused by the GAC to CAC mutation at codon 74 of the alpha1-globin gene corresponding to the Hb Q-Thailand, detected in cis to the 4.2 kb deletional alpha-thalassemia 2 in both cases. Interaction of the alpha(Q-Thailand) with the beta(E) globin chains in the proband 1 leads to a Hb variant, namely the Hb QE. Family study of the proband 1 showed that her non-pregnant sister had the same genotype but her father was a double heterozygote for Hb E and Hb Q-Thailand in whom both Hb Q-Thailand and Hb QE were detected. Genotype-phenotype relationships observed in these families with complex hemoglobinopathies are presented and compared with those of simple homozygote for Hb E, heterozygote for Hb CS and heterozygote for Hb Q-Thailand found in other unrelated subjects. A simple DNA assay based on allele-specific polymerase chain reaction for simultaneous detection of the Hb Q-Thailand mutation and the 4.2 kb deletional alpha-thalassemia 2 determinant was developed and validated.
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Affiliation(s)
- Kanokwan Sanchaisuriya
- The Graduate School, Department of Clinical Microscopy, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
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