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Siti Asmaa MJ, Miin Phoon L, Zakaria NA, Hussin S, Bahar R, Hassan MN, Zulkafli Z, Iberahim S, Abdullah M, Mohd Noor NH, Mohamed Yusoff S, Ramli M. Hematological Profile of Hb Adana Among High School Students in Northeast Peninsular Malaysia. Cureus 2024; 16:e57353. [PMID: 38694420 PMCID: PMC11061810 DOI: 10.7759/cureus.57353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2024] [Indexed: 05/04/2024] Open
Abstract
Background Hb Adana is a non-deletional alpha (α)-thalassaemia variant resulting from mutations in α1- or α2-globin codon 59 (αCD59), leading to the production of unstable α-globin. Clinical manifestations can vary from silent carrier status to dependence on blood transfusions, hepatosplenomegaly, skeletal deformities, and spinal cord compression. Despite the significance of Hb Adana inheritance, studying this variant poses challenges due to the scarcity of molecular tests and the potential for routine diagnoses to be overlooked. This study aims to investigate the prevalence of Hb Adana among local high school students and assess the hematological parameters and hemoglobin analysis of Hb Adana in Malaysia. Methodology This retrospective study analyzed 13,721 blood samples collected from high school students participating in Malaysia's National Thalassaemia Screening Program at Hospital Raja Perempuan Zainab II (HRPZ II). Deletional α-thalassaemia was detected using multiplex gap-polymerase chain reaction (PCR), while common non-deletional α-thalassaemia was identified using multiplex amplification refractory mutation system (ARMS) PCR. Data were extracted from the HRPZ II database for analysis. Results Among the participants, 2327 individuals were found to have either common deletional (n=1037, 44.6%) or non-deletional (n=1290, 55.4%) α-thalassaemia. Hb Constant Spring was the most prevalent non-deletional α-thalassaemia, accounting for 53.03% of cases. Thirty-one participants (1.33%) exhibited αCD59α/αα, and one (0.04%) had αCD59α/-α3.7. Among the 32 subjects with Hb Adana, 87.5% were Malay, and 12.5% were Orang Asli. Additionally, seven cases of HbE/Hb Adana co-inheritance were identified. Hemoglobin levels in heterozygous Hb Adana individuals ranged from mild anemia to normal, between 95 g/L and 153 g/L. Mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) were approximately 73 fL and 23 pg, respectively. Conclusion This study delineates the distribution of α-thalassaemia mutation patterns among high school students in Kelantan, Northeast Peninsular Malaysia. Our findings indicate that Hb Adana is rare in our region and co-inheritance with an α-gene deletion results in α+-thalassaemia and with HbE, α0-thalassaemia. All heterozygous Hb Adana individuals exhibited low MCVs and MCHs.
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Affiliation(s)
- Mat Jusoh Siti Asmaa
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Lee Miin Phoon
- Hematology Unit, Department of Pathology, Hospital Raja Perempuan Zainab II, Kota Bharu, MYS
| | - Nur Atikah Zakaria
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Suryati Hussin
- Hematology Unit, Department of Pathology, Hospital Raja Perempuan Zainab II, Kota Bharu, MYS
| | - Rosnah Bahar
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Mohd Nazri Hassan
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Zefarina Zulkafli
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Salfarina Iberahim
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Marne Abdullah
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Noor Haslina Mohd Noor
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Shafini Mohamed Yusoff
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | - Marini Ramli
- Department of Hematology, School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
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Murad H, Moassas F, Ali B, Katranji E, Mukhalalaty Y. The Spectrum of α-Thalassemia Mutations in Syrian Patients. Hemoglobin 2023; 47:245-248. [PMID: 38146675 DOI: 10.1080/03630269.2023.2296927] [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: 10/11/2023] [Accepted: 12/13/2023] [Indexed: 12/27/2023]
Abstract
α-Thalassemia (α-thal) is a globally prevalent genetic disorder of hemoglobin (Hb) structure where the rate of α-globin chain synthesis is reduced or absent due to the presence of α-globin mutation(s). The aim of this study is to define the spectrum of α-globin gene mutations and evaluate their allele frequency in a group of α-thal carriers. A total of 55 individuals with possible α-thal patients were referred from the thalassemia centers in Syria. They have unexplained hypochromia and microcytosis. All patients were genetically tested for 21 common α-globin gene mutations using reverse hybridization kit. Seven different α-globin gene mutations and 13 different genotypes were detected in 55 patients. The two most frequently encountered mutations were -α3.7 deletion (47.1%) and --MED mutation (21.4%). The most commonly observed genotype was -α3.7/αα (40%), followed by --MED/αα genotype (21.8%). We determined the most common α thalassemia mutations in the Syrian patients. α-Thalassemia mutations with deletions were mostly observed in our study.
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Affiliation(s)
- Hossam Murad
- Molecular Biology and Biotechnology Department, Atomic Energy Commission of Syria, Damascus, Syria
| | - Faten Moassas
- Molecular Biology and Biotechnology Department, Atomic Energy Commission of Syria, Damascus, Syria
| | - Bouthina Ali
- Molecular Biology and Biotechnology Department, Atomic Energy Commission of Syria, Damascus, Syria
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Moradi K, Alibakhshi R, Shafieenia S, Azimi A. Problem of borderline hemoglobin A2 levels in an Iranian population with a high prevalence of α- and β-thalassemia carriers. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00279-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
It is difficult to classify a small fraction of α- and β-thalassemia (α- and β-thal) carriers based on their Hb A2 levels. Here, we report the results of a molecular investigation in a cohort of thalassemia carriers with borderline Hb A2 levels originated from western Iran.
Results
The documents of 5956 α- or β-thal carriers were reviewed. The frequency of individuals with borderline Hb A2 levels in this cohort was 436 (7.32%). A total of 12 different α-thal and 27 different β-thal variants were identified in this study.
Conclusions
Our data showed that individuals with borderline Hb A2 are not uncommon in our population. Moreover, preselection of α- and β-thal carriers with borderline Hb A2 levels based on Hb A2, mean corpuscular volume (MCV), and mean cell hemoglobin (MCH) is not advisable in our population. Therefore, it is necessary to investigate both α- and β-globin genes in cases with borderline Hb A2 levels, especially if the partner is a carrier of β-thal or α0-thal.
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Moradi K, Aznab M, Biglari M, Shafieenia S, Azimi A, Bijari N, Alibakhshi R. Molecular Genetic Analysis of α-Thalassemia in Hamadan Province, West Iran. Hemoglobin 2020; 44:319-324. [PMID: 32893703 DOI: 10.1080/03630269.2020.1800487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Identifying couples who are carriers of thalassemia-causing mutations, followed by prenatal diagnosis (PND), is undoubtedly an effective way to prevent the birth of children with the disease. Our aim in this study was to report for the first time the spectrum of α-globin gene mutations in the population living in Hamadan Province, West Iran. Multiplex gap-polymerase chain reaction (gap-PCR), amplification refractory mutation system (ARMS)-PCR, and direct DNA sequencing of HBA1 and HBA2 genes were used to identify the α-thalassemia (α-thal)-causing mutations in a cohort of 389 individuals including 328 α-thal carriers and 61 normal subjects. A total of 17 different mutations and 25 different genotypes were detected. The -α3.7 (rightward) deletion (NG_000006.1: g.34164_37967del3804) was the most frequent mutation, accounting for more than half of all mutations (61.04%). This study revealed that there is a variety of α-thal mutations and α-thal genotypes in Hamadan Province, West Iran. This observation is probably due to the complexity of the Hamadan Province population that is composed of Persians (Fars), Turks, Kurds, and Lurs/Laks. In conclusion, our results demonstrated the spectrum of mutations in α-globin genes in Iran and increased our understanding of their distribution in this country.
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Affiliation(s)
- Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
| | - Mozaffar Aznab
- Department of Hematology Oncology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
| | - Mostafa Biglari
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
| | - Samaneh Shafieenia
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
| | - Azam Azimi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
| | - Nushin Bijari
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
| | - Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Kermanshah Province, Iran
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Moradi K, Aznab M, Tahmasebi S, Omidniakan L, Bijari N, Alibakhshi R. Distribution of HBB Gene Mutations in the Kurdish Population of Ilam Province, West Iran. Hemoglobin 2020; 44:244-248. [PMID: 32869674 DOI: 10.1080/03630269.2020.1797772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
β-Thalassemia (β-thal) is one of the most common diseases in Iran. Here, we report the spectrum of HBB gene mutations in 176 Kurdish β-thal carriers from the northern part of Ilam Province, Iran. The amplification refractory mutation system-polymerase chain reaction (ARMS-PCR) technique was used to identify common β-globin gene mutations observed in Iran. Samples negative on ARMS-PCR were analyzed by direct sequencing of the β-globin gene. In total, 12 different mutations were identified on the β-globin gene. The mutations of IVS-II-1 (G>A) (HBB: c.315+1G>A), codons 8/9 (+G) (HBB: c.27_28insG), codons 36/37 (-T) (HBB: c.112delT) and IVS-I-110 (G>A) (HBB: c.93-21G>A), were the most prevalent mutations in our samples, with frequencies of 59.09, 10.80, 7.95 and 7.39%, respectively. In general, the mutation spectrum of the β-globin gene in the northern part of Ilam Province is most similar to that in other western provinces of Iran. On the other hand, due to the high prevalence of carriers and β-thal major (β-TM) patients in this province, our results can be helpful in identifying carriers as well as at-risk fetuses through the prenatal diagnosis program.
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Affiliation(s)
- Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mozaffar Aznab
- Department of Hematology Oncology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Susan Tahmasebi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Leila Omidniakan
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nushin Bijari
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Kalle Kwaifa I, Lai MI, Md Noor S. Non-deletional alpha thalassaemia: a review. Orphanet J Rare Dis 2020; 15:166. [PMID: 32600445 PMCID: PMC7322920 DOI: 10.1186/s13023-020-01429-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 05/28/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Defective synthesis of the α-globin chain due to mutations in the alpha-globin genes and/or its regulatory elements leads to alpha thalassaemia syndrome. Complete deletion of the 4 alpha-globin genes results in the most severe phenotype known as haemoglobin Bart's, which leads to intrauterine death. The presence of one functional alpha gene is associated with haemoglobin H disease, characterised by non-transfusion-dependent thalassaemia phenotype, while silent and carrier traits are mostly asymptomatic. MAIN BODY Clinical manifestations of non-deletional in alpha thalassaemia are varied and have more severe phenotype compared to deletional forms of alpha thalassaemia. Literature for the molecular mechanisms of common non-deletional alpha thalassaemia including therapeutic measures that are necessarily needed for the understanding of these disorders is still in demand. This manuscript would contribute to the better knowledge of how defective production of the α-globin chains due to mutations on the alpha-globin genes and/or the regulatory elements leads to alpha thalassaemia syndrome. CONCLUSION Since many molecular markers are associated with the globin gene expression and switching over during the developmental stages, there is a need for increased awareness, new-born and prenatal screening program, especially for countries with high migration impact, and for improving the monitoring of patients with α-thalassaemia.
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Affiliation(s)
- Ibrahim Kalle Kwaifa
- Haematology Unit, Department of Pathology, Faculty of Medicine and Health Sciences, University Putra Malaysia (UPM), Serdang, Selangor, Malaysia
- Department of Haematology, School of Medical Laboratory Sciences, College of Health Sciences, Usmanu Danfodiyo University (UDU), Sokoto, North-Western, Nigeria
| | - Mei I Lai
- Haematology Unit, Department of Pathology, Faculty of Medicine and Health Sciences, University Putra Malaysia (UPM), Serdang, Selangor, Malaysia
- Genetics and Regenerative Medicine Research Centre, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia(UPM), Serdang, Selangor, Malaysia
| | - Sabariah Md Noor
- Haematology Unit, Department of Pathology, Faculty of Medicine and Health Sciences, University Putra Malaysia (UPM), Serdang, Selangor, Malaysia.
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7
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Alibakhshi R, Moradi K, Aznab M, Dastafkan Z, Tahmasebi S, Ahmadi M, Omidniakan L. The Spectrum of α-Thalassemia Mutations in Kurdistan Province, West Iran. Hemoglobin 2020; 44:156-161. [PMID: 32588682 DOI: 10.1080/03630269.2020.1768863] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In order to identify the α-thalassemia (α-thal) mutation spectrum in Kurdistan Province, West Iran, a total of 217 individuals, including 154 α-thal carriers and 63 normal subjects were investigated in this study. Molecular analysis of α1- and α2-globin genes using multiplex gap-polymerase chain reaction (gap-PCR), amplification refractory mutation system (ARMS)-PCR or direct DNA sequencing, showed 11 different α-globin variants. The -α3.7 (rightward) deletion (NG_000006.1: g.34164_37967del3804) (70.32%), polyadenylation signal (polyA2) site (AATAAA>AATGAA) (αpolyA2α) (HBA2: c.*92A>G) (7.74%), -α4.2 (leftward) deletion (6.45%) and codon 59 (or Hb Adana) (G>A) (ααcodon 59) (HBA1: c.179G>A) (4.52%) were the most frequent mutations in the present study. In conclusion, the spectrum of α-thal mutations in Kurdistan Province is closest to that in western provinces of Iran (Kurdish and Laki populations). In addition, it was revealed that the codon 59 mutation is common in the Kurdish population. On the other hand, despite the same ethnic background of Kurds in Iran and Iraq, the - -MED I double gene deletion and polyA2 point mutation have different distributions in these two populations. Therefore, further studies are needed to identify the cause of these differences.
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Affiliation(s)
- Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mozaffar Aznab
- Department of Hematology Oncology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Zahra Dastafkan
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Susan Tahmasebi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mahsa Ahmadi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Leila Omidniakan
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Azimi A, Tahmasebi S, Moradi K, Nejati P, Alibakhshi R. Severe α-Thalassemia Due to Compound Heterozygosity for Hb Adana (α59 Gly>Asp) ( HBA1: c.179G > A) and Codon 127 (A > T) ( HBA2: c.382A > T) in an Iranian Family. Hemoglobin 2020; 44:139-142. [DOI: 10.1080/03630269.2020.1766485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Azam Azimi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Susan Tahmasebi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Parham Nejati
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
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9
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Moradi K, Aznab M, Azimi A, Biglari M, Shafieenia S, Alibakhshi R. α-Thalassemia Mutations in Ilam Province, West Iran. Hemoglobin 2020; 46:147-152. [PMID: 32072847 DOI: 10.1080/03630269.2019.1694033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Despite several studies performed in different provinces of Iran to identify the spectrum of α-globin gene mutations, no such study has so far been carried out in Ilam Province. A total of 274 individuals, including 201 α-thalassemia (α-thal) carriers and 73 normal subjects, originating from the northern counties of Ilam Province, participated in this study. Analysis of α-globin defects was performed using multiplex gap-polymerase chain reaction (gap-PCR), amplification refractory mutation system (ARMS)-PCR and direct sequencing, which revealed a total of 11 different mutations and 22 different genotypes. The -α3.7 (rightward) (NG_000006.1: g.34164_37967del3804), α-5 ntα (HBA2: c.95 + 2_95 + 6delTGAGG), and -α4.2 (leftward) deletions were the most prevalent mutations identified in our study, with frequencies of 66.23, 10.09 and 8.33%, respectively. In conclusion, the present study showed that the α-thal mutation spectrum in Ilam Province, at least in the northern part of the province, is different from that in other geographical regions of Iran. These results increase our knowledge about the spectrum and distribution of α-globin gene mutations in Iran.
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Affiliation(s)
- Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mozaffar Aznab
- Department of Hematology, Oncology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Azam Azimi
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mostafa Biglari
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Samaneh Shafieenia
- Medical Genetics Laboratory, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
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10
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Moradi K, Aznab M, Tahmasebi S, Dastafkan Z, Omidniakan L, Ahmadi M, Alibakhshi R. The Spectrum of α-Thalassemia Mutations in the Lak Population of Iran. Hemoglobin 2019; 43:107-111. [PMID: 31304855 DOI: 10.1080/03630269.2019.1614049] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
α-Thalassemia (α-thal) is one of the most common genetic disorders worldwide. The aim of this study was to investigate for the first time the α-thal mutation spectrum in the Lak population living in Lorestan Province, Iran. One hundred and seventy-six α-thal carriers participated in the study. Multiplex gap-polymerase chain reaction (gap-PCR), amplification refractory mutation system (ARMS)-PCR and direct sequencing were used for the detection of different mutations on the α-globin (HBA1 and HBA2) genes. A total of 11 different mutations was identified. The -α3.7 (rightward; NG_000006.1: g.34164_37967del3804) deletion was observed most frequently (56.35%), followed by α-5 ntα (HBA2: c.95+2_95+6delTGAGG), αpolyA2α (HBA2: c.*92A>G) and - -MED I (NG_000006.1: g.24664_41064del16401), with frequencies of 15.47, 9.39, and 6.08%, respectively. These four mutations accounted for more than 87.0% of the total mutated alleles. Moreover, 19 different genotypes were identified. The types and distribution pattern of the mutations identified in this study, in comparison with other studies conducted in Iran, was most similar to the Kurdish population of Kermanshah Province, Iran. Due to the lack of information on α-thal in Lorestan Province, it was not possible to compare the mutation spectrum in the Lur and Lak populations. In conclusion, our results may help in setting up a strategy for an α-thal screening program and genetic counseling in the Lak people.
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Affiliation(s)
- Keivan Moradi
- a Medical Biology Research Center , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Mozaffar Aznab
- b Department of Hematology Oncology, School of Medicine , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Susan Tahmasebi
- c Medical Genetics Laboratory , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Zahra Dastafkan
- c Medical Genetics Laboratory , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Leila Omidniakan
- c Medical Genetics Laboratory , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Mahsa Ahmadi
- c Medical Genetics Laboratory , Kermanshah University of Medical Sciences , Kermanshah , Iran
| | - Reza Alibakhshi
- d Department of Biochemistry, School of Medicine , Kermanshah University of Medical Sciences , Kermanshah , Iran
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11
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Singh SA, Sarangi S, Appiah-Kubi A, Hsu P, Smith WB, Gallagher PG, Glader B, Chui DHK. Hb Adana (HBA2 or HBA1: c.179G > A) and alpha thalassemia: Genotype-phenotype correlation. Pediatr Blood Cancer 2018; 65:e27220. [PMID: 29749692 DOI: 10.1002/pbc.27220] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/17/2018] [Accepted: 03/29/2018] [Indexed: 11/11/2022]
Abstract
Alpha thalassemia due to nondeletional mutations usually leads to more severe disease than that caused by deletional mutations. Devastating outcomes such as hydrops fetalis can occur with two nondeletional mutations, therefore warranting DNA-based workup for suspected carriers with subtle hematological abnormalities for family counseling purposes. We describe three cases with hemoglobin (Hb) Adana, a nondeletional alpha chain mutation, compounded with an alpha globin gene deletion resulting in thalassemia intermedia. We review the literature, draw genotype-phenotype correlations from published cases of Hb Adana, and propose that this correlation can be used by clinicians to help direct diagnostic studies and urge hematologists to thoroughly workup high-risk patients.
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Affiliation(s)
- Sharon A Singh
- Western Michigan University Homer Stryker M.D. School of Medicine, Kalamazoo, Michigan
| | | | | | | | | | | | - Bertil Glader
- Stanford University Medical Center, Palo Alto, California
| | - David H K Chui
- Boston University School of Medicine, Boston, Massachusetts
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12
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Keikhaei B, Slehi-fard P, Shariati G, Khosravi A. Genetics of Iranian Alpha-Thalassemia Patients: A Comprehensive Original Study. Biochem Genet 2018; 56:506-521. [DOI: 10.1007/s10528-018-9857-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Accepted: 04/03/2018] [Indexed: 11/30/2022]
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13
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Valaei A, Karimipoor M, Kordafshari A, Zeinali S. Molecular Basis of α-Thalassemia in Iran. IRANIAN BIOMEDICAL JOURNAL 2018; 22:6-14. [PMID: 29115104 PMCID: PMC5712386 DOI: 10.22034/ibj.22.1.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Alpha-thalassemia (α-thal) is probably the most prevalent monogenic condition in the world. Deletions are the most common types of mutations in α-thal, followed by point mutations and small insertion/deletion. In the context of national screening program for prevention of thalassemia and hemoglobinopathies in Iran, α-thal carriers have come to more attention. Therefore, the frequency and distribution of α-globin mutations in various regions of the country have been studied in recent years. A comprehensive search was performed in PubMed, Scopus, and national databases for finding reports on mutation detection in α-thal carriers and HbH disease with Iranian origin. The mutation data of 10849 α-thal carriers showed that -α3.7 and α-5NT were the most common deletional and nondeletional mutations, respectively. In HbH disease cases, the -α3.7/--MED was the most prevalent genotype. Overall, 42 different mutations have been identified in α-globin cluster reflecting the high heterogeneity of the mutations in Iranian populations.
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Affiliation(s)
- Atefeh Valaei
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Morteza Karimipoor
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Alireza Kordafshari
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Sirous Zeinali
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.,Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
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