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Panyasai S, Kongthai K, Phasit A. Association of Hb Shenyang [α26(B7)Ala→Glu, G CG>G AG, HBA2: c.80C>A (or HBA1)] with Several Types of α-Thalassemia in Thailand. Hemoglobin 2020; 44:354-360. [PMID: 33023349 DOI: 10.1080/03630269.2020.1828096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Hb Shenyang [α26(B7)Ala→Glu, HBA2: c.80C>A (or HBA1)] is a rare α chain variant. Its genotype-phenotype relationship and origin have not been described in Thailand before. Three Thai subjects (P1-P3) carrying this variant were studied. Hemoglobin (Hb) analysis was performed by capillary electrophoresis (CE) and high performance liquid chromatography (HPLC) as well as molecular characterization using appropriate polymerase chain reaction (PCR) techniques and DNA sequencing. Hemoglobin analysis by HPLC revealed fast-moving abnormal peaks at a retention time (RT) of 1.59-1.62 min., while CE revealed a fast-moving abnormal Hb at zone 12 and ahead of Hb A2 in three subjects. DNA analysis revealed a C>A transition at codon 26 of the α2-globin gene glutamic acid to replace alanine, corresponding to Hb Shenyang. The Southeast Asian [- -SEA α-thalassemia-1 (α-thal-1)] deletion was also identified in P1 and his mother, while Hb Constant Spring (Hb CS, HBA2: c.427T > C) was identified in P2. The Hb Shenyang concentration measured by CE revealed 5.1-17.2% heterozygosity with normal red blood cell (RBC) parameters. The α haplotype [+ - S + - + -] [S signifies the inter ζ hypervariable region (HVR)] was associated with the Thai Hb Shenyang. The genotype-phenotype relationship indicates Hb Shenyang is likely a non pathological Hb variant that has neither dramatic clinical symptoms nor hematological anomalies. A simple multiplex allele-specific PCR for rapid diagnosis of Hb Shenyang has been developed.
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Affiliation(s)
- Sitthichai Panyasai
- Department of Medical Technology, School of Allied Health Sciences, University of Phayao, Phayao, Thailand
| | | | - Amphai Phasit
- Department of Medical Technology, Lampang Hospital, Lampang, Thailand
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Mella F, Yamashiro Y, Adhiyanto C, Tanaka T, Nitta T, Amao Y, Kimoto M. A Coincidental Discovery of a New Stable Variant (Hb Hachioji or HBB: c.187C>T) in a Patient with Chronic Hemolytic Anemia of Unexplained Origin. Hemoglobin 2018. [PMID: 29513125 DOI: 10.1080/03630269.2018.1429279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
We report a new hemoglobin (Hb) variant, Hb Hachioji (HBB: c.187C>T), which was detected in a 32-year-old male with hemolytic anemia. The proband had undergone splenectomy in his childhood after being diagnosed with hereditary spherocytosis (HS) with no clinical improvement. A recent study showed that Heinz bodies were frequently observed in his red cells, however, no abnormal band was separated by isoelectric focusing (IEF), and the isopropanol (instability) test was negative. Direct sequencing revealed that the proband was a heterozygous carrier of a novel mutation (GCT>GTT) at codon 62 of the β-globin gene, leading to an alanine to valine substitution. This variant was named Hb Hachioji. Characterization at the mRNA level by cDNA sequencing detected βHachioji mRNA, as well as βA mRNA. Subsequently, study of the proband's family indicated that his father was a carrier of this Hb variant, although unexpectedly, the father was asymptomatic and clinically healthy. Oxygen affinity measurement of total Hb showed no alteration in the P50 and oxygen equilibrium curve. The presence of Hb Hachioji was confirmed by mass spectrometry (MS). Hb Hachioji comprised approximately 50.0% of the total Hb and was a stable variant. The phenotypic discrepancy between these two carriers suggests that Hb Hachioji may not be associated with the hemolytic involvement in the proband. P4.2Nippon, which is the primary cause of most cases of Japanese HS, was absent in the proband's parents. The coexistence of glucose-6-phosphate dehydrogenase (G6PD) deficiency was ruled out. Thus, the cause of hemolytic involvement in this patient remains unclear.
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Affiliation(s)
- Ferania Mella
- a Department of Health Sciences , Yamaguchi University Graduate School of Medicine , Ube , Japan
| | - Yasuhiro Yamashiro
- a Department of Health Sciences , Yamaguchi University Graduate School of Medicine , Ube , Japan
| | - Chris Adhiyanto
- b Faculty of Medicine and Health Sciences , Syarif Hidayatullah State Islamic University , Jakarta , Indonesia
| | - Tatehiko Tanaka
- a Department of Health Sciences , Yamaguchi University Graduate School of Medicine , Ube , Japan
| | - Takenori Nitta
- c Division of Structural Biology , Medical Institute of Bioregulation, Kyushu University , Fukuoka , Japan
| | - Yuki Amao
- a Department of Health Sciences , Yamaguchi University Graduate School of Medicine , Ube , Japan
| | - Masafumi Kimoto
- d Department of Clinical Laboratory , Fukuyama Medical Center , Fukuyama , Japan
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Harteveld CL, Pissard S, Korver AMH, Riou J, Legac E, Lansbergen G, Pardijs IL, Giordano PC, Versteegh FGA. Hb Olivet (HBA1: C.40G > A; p.Ala14Thr), a Novel Silent Hemoglobin Variant in Two Families of Distinct Origin. Hemoglobin 2016; 40:349-352. [PMID: 27624280 DOI: 10.1080/03630269.2016.1210160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
We report two families, members of which are carriers of a novel hemoglobin (Hb) variant that was named Hb Olivet [α13(A11)Ala→Thr (α1) (GCC > ACC); HBA1: c.40G > A; p.Ala14Thr]. The analysis of these cases allowed a clear description of this anomaly that behaves as a silent Hb. In the first family, of Portuguese ethnicity living in France, the proband, a 24-year-old male and his 57-year-old mother, both appeared to be carriers. The son presented with borderline mean corpuscular volume (MCV), while the mother was normocytic and normochromic. Hemoglobin separation on capillary electrophoresis (CE) was normal, while a slightly asymmetric peak was observed on high performance liquid chromatography (HPLC). In a second family, originally from Surinam but living in The Netherlands, the proband, a 6-year-old girl, showed a mild microcytosis at low ferritin levels. The abnormal Hb was inherited from the mother who was clearly iron depleted, was not present in the sister and brother of the proband. The microcytic hypochromic anemia was only shown in two out of a total of four carriers. It therefore seems likely that iron depletion is causative as two carriers are completely normal. Characterization and genotype/phenotype correlation are briefly described.
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Affiliation(s)
- Cornelis L Harteveld
- a Hemoglobinopathies Laboratory, Department of Human and Clinical Genetics , Leiden University Medical Center (LUMC) , Leiden , the Netherlands
| | - Serge Pissard
- b Laboratory of Genetics , Assistance Publique-Hôitaux De Paris (APHP), Groupe Hospitalier Universitaire (GHU) Henri Mondor, Universite Paris Est Créteil (UPEC) and Inserm Institut Mondor De Recherche Biologique (IMRB) U955eq2 , Créteil , France
| | - Anna M H Korver
- c Department of Pediatrics , Groene Hart Hospital , Gouda , the Netherlands
| | - Jean Riou
- d Laboratory of Genetics , Assistance Publique-Hôitaux De Paris (APHP), Groupe Hospitalier Universitaire (GHU) Henri Mondor , Créteil , France
| | - Eric Legac
- e Laboratory of Biology , Centre Hospitalier Régioonale (CHR) Orleans , Orleans , France
| | - Gideon Lansbergen
- f Clinical Chemistry, Groene Hart Hospital , Gouda , the Netherlands
| | - Inge L Pardijs
- c Department of Pediatrics , Groene Hart Hospital , Gouda , the Netherlands.,g General Practitioner , Gouda , the Netherlands
| | - Piero C Giordano
- a Hemoglobinopathies Laboratory, Department of Human and Clinical Genetics , Leiden University Medical Center (LUMC) , Leiden , the Netherlands
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Uludağ A, Uysal A, Uludağ A, Ertekin YH, Tekin M, Kütük B, Silan F, Özdemir Ö. Prevalence and mutations of β-thalassemia trait and abnormal hemoglobins in premarital screening in Çanakkale province, Turkey. Balkan J Med Genet 2016; 19:29-34. [PMID: 27785405 PMCID: PMC5026277 DOI: 10.1515/bjmg-2016-0004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The prevalence of β-thalassemia (β-thal) carriers in Turkey varies according to region but in general it is 2.0%. Çanakkale is a city in the Aegean region of Turkey but no study about β-thal frequency in Çanakkale has been published to date. In this study, we aimed to investigate the frequency of β-thal mutations in this province. A total of 4452 couples (8904 individuals) applied for premarital thalassemia scans at the Çanakkale State Health Directorate Laboratory between January 2008 and June 2012 and scanning was done with high performance liquid chromatography (HPLC). Of 125 β-thal carriers seen at the Medical Genetics Clinic, Çanakkale Onsekiz Mart University, Çanakkale, Turkey, for genetic counseling, 46 participated in the study. The remaining 79 patients could not be reached. The prevalence for β-thal carriers in Çanakkale was identified as 1.4% (125/8904). One couple were both β-thal carriers. β-Globin gene analysis of 46 carriers found the total frequency of the three most common mutations was 45.6%. These mutations were found to be HBB: c.93-21G>A [IVS-I-110 (G>A)], 26.08% (12/46); HBB: c.17_ 18delCT [codon 5 (‒CT)], 10.85% (5/46); HBB: c.20delA [codon 6 (‒A)] 8.69% (4/46). This is the first report on the frequency and mutation profiles of β-thal for Çanakkale. The incidence of β-thal carriers in Çanakkale is below the average for Turkey. The most frequently observed mutation profile and rate of β-thal in our region is different from the other regions of Turkey.
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Affiliation(s)
- A Uludağ
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - A Uysal
- Department of Obstetrics and Gynecology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - A Uludağ
- Department of Family Medicine, Çanakkale Onsekiz Mart University, Çanakkale/Turkey
| | - Y H Ertekin
- Department of Family Medicine, Çanakkale Onsekiz Mart University, Çanakkale/Turkey
| | - M Tekin
- Department of Family Medicine, Çanakkale Onsekiz Mart University, Çanakkale/Turkey
| | - B Kütük
- Ministry of Health, Çanakkale Public Health Center, Çanakkale, Turkey
| | - F Silan
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Ö Özdemir
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
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Abstract
To contribute to the creation of a mutation map of the region, we aimed to determine the mutation spectrum of thalassemias and abnormal hemoglobins (Hbs) in the Çukurova region and surrounding provinces. In this study, a total of 8135 samples from Adana, Hatay, Mersin, Konya and Kayseri provinces between 1993 and 2014 were analyzed. Complete blood cell (CBC) counts and Hb typing were carried out using automatic cell counters, cellulose acetate membrane electrophoresis and high performance liquid chromatography (HPLC), respectively. For the molecular analyses, genomic DNA was extracted using both manual and automated DNA extraction devices. Determination of Hb mutations were done by microarray, restriction fragment length polymorphism (RFLP), amplification refractory mutation system (ARMS) and gap-polymerase chain reaction (gap-PCR) methodologies. Samples were analyzed for abnormal Hb and thalassemia mutations. Out of 8135 samples, 1382 were observed to be carrying Hb mutations. It was identified that 826 mutation carriers included abnormal Hbs with a frequency of 59.7%, 416 carriers included β-thalassemia (β-thal) mutations with a frequency of 30.7% and 136 carriers included α-thalassemia (α-thal) mutations with a frequency of 9.9%. In this study, the most frequently observed abnormal Hb in the region was Hb S [β6(A3)Glu→Val (GTG > GAG), HBB: c.20T > A], whereas the most commonly observed mutations were the IVS-I-110 (G > A) (HBB: c.93-21G > A) point mutation in β-thal and the 3.7 kb deletion in α-thal.
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Affiliation(s)
- Sedefgul Yuzbasioglu Ariyurek
- a Department of Medical Services and Technics , Vocational School of Health Services, Çukurova University , Adana , Turkey
| | - Sule Menziletoglu Yildiz
- a Department of Medical Services and Technics , Vocational School of Health Services, Çukurova University , Adana , Turkey
| | - Ali Erdinc Yalin
- b Department of Biochemistry , Faculty of Pharmacy, Mersin University , Mersin , Turkey
| | - Figen Guzelgul
- c Department of Medical Biochemistry , Faculty of Medicine, Çukurova University , Adana , Turkey
| | - Kiymet Aksoy
- c Department of Medical Biochemistry , Faculty of Medicine, Çukurova University , Adana , Turkey
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