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Zheng LH, Liang L, Bai JP, Liao HX, Li YQ. Misdiagnosis of β-Thalassemia Major Due to Chinese Gγ+( Aγδβ) 0-Thalassemia Combined with β 0-Thalassemia. Hemoglobin 2024; 48:24-29. [PMID: 38240123 DOI: 10.1080/03630269.2023.2299439] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 12/20/2023] [Indexed: 04/18/2024]
Abstract
δβ-thalassemia is a rare type of thalassemia characterized by increased Hb F levels, including mainly Chinese Gγ(Aγδβ)0-thalassemia, Yunnanese Gγ(Aγδβ)0-thalassemia, Cantonese Gγ(Aγδβ)0-thalassemia in China. Due to the low rate of δβ-thalassemia carriers, there are few reports of δβ-thalassemia combined with β-thalassemia causing β-thalassemia major. Herein, we described the combination of Chinese Gγ(Aγδβ)0-thalassemia and β-thalassemia leading to β-thalassemia major in a Chinese patient. Hemoglobin analysis was performed by capillary electrophoresis (CE). Routine genetic analysis was carried out by gap-polymerase chain reaction (Gap-PCR) and PCR and reverse dot blot (PCR-RDB). Multiple ligation-dependent probe amplification (MLPA) was used to detect the large deletion, and Gap-PCR confirmed the deletion. A CE result showed an elevated Hb F level of 98.7% and 11.7% in the proband and her mother, but the proband was diagnosed with βCD17M/βCD17M using routine genetic analysis. However, her father was heterozygous for CD17 in β-globin, and her mother was detected as SEA heterozygous. The further analysis presented that the proband had actually missed the diagnosis of Chinese Gγ(Aγδβ)0-thalassemia by MLPA and PCR-RDB. Finally, the genotype of the proband was corrected from βCD17M/βCD17M to βCD17M/βGγ(Aγδβ)0. This is the first report of Chinese Gγ(Aγδβ)0-thalassemia combined with β-thalassemia resulting in β-thalassemia major in China. Screening for δβ-thalassemia by Hb analysis could be an effective method.
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Affiliation(s)
- Li-Hong Zheng
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Liang Liang
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Jin-Ping Bai
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Han-Xian Liao
- Department of Clinical Laboratory, Guangxi Hospital Division of the First Affiliated Hospital, Sun Yat-sen University, Nanning, People's Republic of China
| | - You-Qiong Li
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
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Ladu AI, Satumari NA, Abba AM, Abulfathi FA, Jeffery C, Adekile A, Bates I. Clinical and laboratory factors associated with splenic dysfunction among patients with sickle cell disease in a malaria endemic region. Trans R Soc Trop Med Hyg 2023; 117:859-866. [PMID: 37615662 PMCID: PMC10695422 DOI: 10.1093/trstmh/trad059] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 07/15/2023] [Accepted: 08/15/2023] [Indexed: 08/25/2023] Open
Abstract
BACKGROUND Although loss of splenic function is the expected natural course for individuals with sickle cell disease (SCD), factors such as high HbF and coexistence of alpha thalassemia may ameliorate this process. We evaluated factors associated with two surrogate markers of spleen dysfunction, namely Howell-Jolly bodies (HJBs) and argyrophilic inclusion (AI) red cell counts, among patients with SCD. METHODS Cross-sectional data of 182 patients with SCD (median age 11 y; 1-45 y) and 102 normal controls (median age 12 y; 1-32 y) were evaluated. Blood tests including full blood count, serum chemistry and high-performance liquid chromatography were performed. The HJB and AI red cell counts were performed on peripheral blood smears. RESULTS The percentages of HJB and AI red cells rose significantly with increasing age in the SCD group. On regression analysis, the frequency of HJB red cells associated positively with mean corpuscular hemoglobin (MCH) (β=0.289; p=0.001) and negatively with HbF (β=-0.259; p=0.002). The AI red cell counts also associated positively with MCH (β=0.321; P=0.001) and negatively with HbF (β=-0.242; p=0.020). CONCLUSIONS Data from this study indicate that the negative association of HbF with both markers of splenic dysfunction among our patients with SCD residing in a malaria endemic region is similar to findings elsewhere of its ameliorating effect on splenic dysfunction.
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Affiliation(s)
- Adama I Ladu
- Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK
- Department of Haematology, Faculty of Basic Clinical Sciences, University of Maiduguri, Maiduguri, Borno State 60001, Nigeria
| | - Ngamarju A Satumari
- Department of Medical Laboratory Science, Faculty of Allied Health Sciences, University of Maiduguri, Maiduguri, Borno State 60001, Nigeria
| | - Aisha M Abba
- Department of Haematology, Faculty of Basic Clinical Sciences, University of Maiduguri, Maiduguri, Borno, 60001, Nigeria
| | - Fatima A Abulfathi
- Department of Haematology, Faculty of Basic Clinical Sciences, University of Maiduguri, Maiduguri, Borno, 60001, Nigeria
| | - Caroline Jeffery
- Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK
- Department of Clinical Infection, Microbiology and Immunology, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, L69 3BX, UK
| | - Adekunle Adekile
- Department of Paediatrics, Faculty of Medicine, Kuwait University, Saffat 13110, Kuwait
| | - Imelda Bates
- Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK
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Mohammadi Z, Mohammadi R, Haghpanah S, Moghadam M, Pazhoomand R, Karimi M. Association of Exon 14 of the SOX6 Gene Sequence Variations with Response to Hydroxyurea Therapy in Patients Carrying Non Transfusion-Dependent Thalassemia. Hemoglobin 2020; 44:406-410. [PMID: 33164584 DOI: 10.1080/03630269.2020.1845722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/15/2023]
Abstract
Hydroxyurea (HU) activates the γ-globin gene, resulting in increased Hb F synthesis. The SOX6 gene is a member of the Sox (Sry-type HMG box) family of transcription factors, characterized by minor groove binding domain. The DNA binding domain of this gene is encoded by exon 14. We assessed the relationship between response to HU and exon 14 of the SOX6 gene sequence variations in patients with non transfusion-dependent thalassemia (NTDT). One hundred NTDT patients from southern Iran underwent HU therapy randomly participated in this cross-sectional study between February 2013 and October 2014. Based on response to HU therapy, the patients were divided into two groups: good and poor responder. Sequence variations of exon 14 of the SOX6 gene was assayed by the Sanger sequencing technique. From all evaluated single nucleotide polymorphisms (SNPs) as above, we found no significant association between sequence variations of exon 14 of the SOX6 gene and response to HU therapy (p > 0.05). It seems that no SNPs in exon 14 of the SOX6 gene is associated with response to HU in NTDT patients, but more studies are needed for further evaluation.
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Affiliation(s)
- Zahra Mohammadi
- Department of Pediatric Hematology/Oncology, Hematology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Mohammadi
- Department of Medical Genetics, Shiraz Infertility Treatment, Shiraz, Iran
| | - Sezaneh Haghpanah
- Department of Pediatric Hematology/Oncology, Hematology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohamad Moghadam
- Department of Pediatric Hematology/Oncology, Hematology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Pazhoomand
- Department of Medical Genetics, Shiraz Infertility Treatment, Shiraz, Iran
| | - Mehran Karimi
- Department of Pediatric Hematology/Oncology, Hematology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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4
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Tepakhan W, Kanjanaopas S, Srewaradachpisal K. Association Between Genetic Polymorphisms and Hb F Levels in Heterozygous β-Thalassemia 3.5 kb Deletions. Hemoglobin 2020; 44:338-343. [PMID: 32878504 DOI: 10.1080/03630269.2020.1811117] [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
Single nucleotide polymorphisms (SNPs) in several genetic modifying factors have been related to Hb F levels, including Gγ XmnI polymorphism, B-cell lymphoma/leukemia 11 A (BCL11A), HBS1L-MYB intergenic polymorphism (HMIP) and a mutation in the Krüppel-like factor 1 (KLF1). This study aimed to determine whether genetic variability of these modifying factors affects Hb F levels in heterozygous β-thalassemia (β-thal) 3.5 kb deletion (NC_000011.10: g.5224302-5227791del13490bp). A total of 111 β-thal 3.5 kb deletion carriers with Hb F levels ranging from 0.9 to 18.4% was recruited for this study. Genotyping of SNPs including HBG2 rs7482144, HMIP rs4895441 and rs9399137, BCL11A rs4671393 and KLF1 rs2072596 was identified. Multiple regression analyses showed that only two SNPs (HMIP rs4895441 and rs9399137) influenced Hb F levels. Interestingly, a combination of these two SNPs was associated with higher Hb F levels. Our study is the first to demonstrate that the rs4895441, rs9399137 of HMIP are associated with elevated Hb F levels in the heterozygous β-thal 3.5 kb deletion.
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Affiliation(s)
- Wanicha Tepakhan
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Sataron Kanjanaopas
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Korntip Srewaradachpisal
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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Abstract
Sickle cell disease is one of the most common severe monogenic disorders in the world. The -158 XmnI polymorphism (C>T) of the Gγ-globin gene promoter is known to be associated with increased expression of the Gγ-globin gene, thus, higher production of Hb F and lesser clinical severity. This study aims to determine the frequency of the XmnI polymorphism and its association with Hb F levels as a modulating factor of sickle cell disease severity in north Moroccan patients. Three hundred and eight subjects carrying the sickle cell mutation and 160 healthy individuals were recruited at the regional hospital of Larache, Morocco. The complete blood count and the Hb F levels were analyzed. The XmnI polymorphism was determined by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique and statistical analysis were done using the Statistical Package for Social Sciences software version 20. Our results estimated the allelic frequency of the XmnI polymorphism in our population at 15.8%. Out of 468 samples, 7.6% were homozygous [+/+] and 16.4% were heterozygous [+/-] for the XmnI polymorphism. This polymorphism was revealed at 20.6% in SS patients, 24.2% in AS carriers, 28.6% in Hb S (HBB: c.20A>T)/β-thalassemia (β-thal) patients and 22.5% in AA subjects. The north Moroccan sickle cell disease patients have shown a low frequency of the XmnI polymorphism. This was later found to be associated with high Hb F levels and mild clinical severity.
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Affiliation(s)
- Fatima-Zahra Alaoui-Ismaili
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaadi, Tangier, Morocco
| | - Achraf Laghmich
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaadi, Tangier, Morocco
| | - Naima Ghailani-Nourouti
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaadi, Tangier, Morocco
| | - Amina Barakat
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaadi, Tangier, Morocco
| | - Mohcine Bennani-Mechita
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaadi, Tangier, Morocco
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Al-Ali AK, Alsulaiman A, Alzahrani AJ, Obeid OT, Vatte CB, Cyrus C, Alnafie AN, Alali RA, Alfarhan M, Mozeleski B, Steinberg MH. Prevalence and Diversity of Haplotypes of Sickle Cell Disease in the Eastern Province of Saudi Arabia. Hemoglobin 2020; 44:78-81. [PMID: 32448003 DOI: 10.1080/03630269.2020.1739068] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 12/20/2022]
Abstract
Hb F modulates sickle cell disease. Five major haplotypes of the β-globin gene cluster are associated with sickle cell disease. In the Eastern Province of Saudi Arabia, the Arab-Indian (AI) is most common. Single nucleotide polymorphism (SNP) genotyping (rs3834466, rs28440105, rs10128556, and rs968857) was carried out by nuclease allelic discrimination assay with target-specific forward and reverse primers, TaqMan probes, labeled with VIC and FAM. In 778 patients with sickle cell disease from the Eastern Province, a haplotype was assigned to 90.9% of all samples; 9.1% were classified as compound heterozygotes for the AI and an atypical haplotype. The distribution of haplotypes for 746 Hb S (HBB: c.20A > T) homozygotes was: 614 AI/AI, nine SEN/SEN (Senegal), 42 SEN/AI, nine CAM/CAM (Cameroon), one CAR (Central African Republic)/BEN (Benin), 71 AI/atypical. In Hb S/β-thalassemia (Hb S/β-thal), the distribution of Hb S haplotypes was: 22 AI/AI, one CAM/CAM, four AI/SEN, five AI/atypical. Mean Hb F in the haplotypes was: AI/AI 16.6 ± 7.5%, CAM/CAM 8.0 ± 4.1%, SEN/SEN 11.0 ± 5.1%, SEN/AI 15.1 ± 4.6%, AI/atypical 16.2 ± 6.5%. The presence of the SEN and CAM haplotypes was unexpected due to the apparent homogeneity of the population of the Eastern Province. We have successfully classified sickle cell disease haplotypes using the relatively inexpensive TaqMan assay for the first time. In addition, we have previously shown that children with AI haplotype have Hb F of 30.0% and mild disease, while in our cohort of adult AI patients, which might be the largest yet reported, Hb F was about 16.6%.
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Affiliation(s)
- Amein K Al-Ali
- Department of Clinical Biochemistry, College of Medicine, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Ahmed Alsulaiman
- Department of Medicine, King Fahd Hospital, Alomran Scientific Chair, King Faisal University, Al-Ahssa, Saudi Arabia
| | - Alhusain J Alzahrani
- Department of Microbiology, College of Applied Medical Sciences, University of Hafre Al Batin, Hafre Al Batin, Saudi Arabia
| | - Obeid T Obeid
- Department of Clinical Biochemistry, College of Medicine, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Chitti Babu Vatte
- Department of Clinical Biochemistry, College of Medicine, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Cyril Cyrus
- Department of Clinical Biochemistry, College of Medicine, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Awatif N Alnafie
- Department of Pathology, King Fahd Hospital of The University, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Rudaynah A Alali
- Department of Medicine, King Fahd Hospital of the University, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mohammed Alfarhan
- Department of Medicine, King Fahd Hospital, Alomran Scientific Chair, King Faisal University, Al-Ahssa, Saudi Arabia
| | - Brian Mozeleski
- Department of Clinical Biochemistry, College of Medicine, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Martin H Steinberg
- Center of Excellence in Sickle Cell Disease, Boston Medical Center, Boston, MA, USA
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7
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Manco L, Bento C, Relvas L, Cunha E, Pereira J, Moreira V, Alvarez M, Maia T, Ribeiro ML. Multi-Locus Models to Address Hb F Variability in Portuguese β-Thalassemia Carriers. Hemoglobin 2020; 44:113-117. [PMID: 32319326 DOI: 10.1080/03630269.2020.1753766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/30/2023]
Abstract
Hb F production is under the influence of major quantitative trait loci (QTL). The present study aims: i) to replicate the association with Hb F for representative genetic variants in the three major Hb F QTLs in a Portuguese sample of β-thalassemia (β-thal) carriers; and ii) to test different genetic multi-locus models to account for the genetic component of Hb F variation. A population sample of 79 Portuguese β-thal carriers (39 males, 40 females), aged between 2 to 70 years old, were genotyped for polymorphisms in the locus control region (LCR)-5' hypersensitive site 4 (5'HS4) rs16912979, XmnI-HBG2 rs7482144, BCL11A rs1427407 and HMIP rs66650371, using standard biomolecular procedures. Univariate linear regression models were used to test for genetic associations with Hb F. The minor alleles of the individual variants BCL11A rs1427407 (T) (0.165), HMIP rs66650371 (3 bp del) (0.247) and XmnI-HBG2 rs7482144 (T) (0.196), were found to be significantly associated with increased levels of Hb F (p = 0.029, p = 0.002 and p = 0.0004, respectively), explaining about 6.0, 12.0 and 15.0% of Hb F variation, respectively. In a multiple linear regression approach, the three loci accounted for about 30.0% of Hb F variance. Two genetic risk scores (GRS), rationalizing the number of minor alleles into a single genetic variable, explained about 30.0 and 32.0% of the Hb F variation. In conclusion, we replicated in β-thal carriers previously reported associations with Hb F. Multi-locus models combining three representative variants of Hb F influencing QTLs can explain a larger amount of Hb F variability.
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Affiliation(s)
- Licínio Manco
- Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, University of Coimbra, Coimbra, Portugal.,Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - Celeste Bento
- Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, University of Coimbra, Coimbra, Portugal.,Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - Luís Relvas
- Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - Elisabete Cunha
- Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - Janet Pereira
- Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - Valeria Moreira
- Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Manuela Alvarez
- Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Tabita Maia
- Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
| | - M Letícia Ribeiro
- Research Centre for Anthropology and Health (CIAS), Department of Life Sciences, University of Coimbra, Coimbra, Portugal.,Department of Haematology, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
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8
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Jiang H, Jiang F, Li J, Tang F, Li DZ. Congenital Nonspherocytic Hemolytic Anemia Caused by Krüppel-Like Factor 1 Gene Variants: Another Case Report. Hemoglobin 2019; 43:292-295. [PMID: 31645145 DOI: 10.1080/03630269.2019.1680384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 10/25/2022]
Abstract
In this study, we report on a compound heterozygote for variants in the key erythroid transcription factor Krüppel-like factor 1 (KLF1) gene in a patient who presented with severe, transfusion-dependent hemolytic anemia. The red cells were normochromic and normocytic, and resembled those seen in patients with congenital nonspherocytic hemolytic anemia (CNSHA). Next generation sequencing (NGS) revealed that the patient was a compound heterozygote for the KLF1 frameshift variant c.519_525dup (p.Gly176ArgfsTer179) and a missense variant c.1012C>A (p.Pro338Thr). This report adds to the wide clinical spectrum of KLF1 gene variants. We suggest that loss of KLF1 should be considered in otherwise unexplained cases of congenital hemolytic anemia.
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Affiliation(s)
- Hua Jiang
- Department of Pediatric Hematology-Oncology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Fan Jiang
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Jian Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Fang Tang
- Neonatal Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Dong-Zhi Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, People's Republic of China
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Listì F, Sclafani S, Agrigento V, Barone R, Maggio A, D'Alcamo E. Study on the Role of Polymorphisms of the SOX-6 and MYB Genes and Fetal Hemoglobin Levels in Sicilian Patients with β-Thalassemia and Sickle Cell Disease. Hemoglobin 2018; 42:103-107. [PMID: 30200835 DOI: 10.1080/03630269.2018.1482832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 12/22/2022]
Abstract
The hemoglobinopathies, as β-thalassemia (β-thal) and sickle cell disease, are the most common hereditary hemolytic anemias. The increase of fetal hemoglobin (Hb F) levels can ameliorate the symptoms of hemoglobinopathies. There are several transcription factors such as MYB and SOX-6, which are involved in the regulation of Hb F. There are not enough studies investigating the association between single nucleotide polymorphisms (SNPs) of the SOX-6 and MYB genes and the variation of Hb F levels in patients affected by sickle cell disease and β-thal. We therefore decided to analyze the role of four missense variants of MYB and SOX-6 genes in the regulation of Hb F levels. In order to do so, we examinated 30 Sicilian patients affected by sickle cell disease and β-thal, to understand if these variants could also have an influence in our populations. Comparing two groups of patients with low and high levels of Hb F, we found no significant differences in the genetic distribution and allelic frequency of MYB and SOX-6 gene polymorphisms. We also created and compared a 'high producer' and 'low producer' genotype with different genes achieving the same result of no significant difference. Our results may be due either to the fact that the association between these genes and the regulation of Hb F levels are influenced by environmental history and population genetics, or to the small number of samples being analyzed.
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Affiliation(s)
- Florinda Listì
- a Ospedale V. Cervello, Unità Operativa Complessa (UOC), Ematologia per le Malattie Rare del Sangue e degli Organi Ematopoietici , Azienda Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italia
| | - Serena Sclafani
- a Ospedale V. Cervello, Unità Operativa Complessa (UOC), Ematologia per le Malattie Rare del Sangue e degli Organi Ematopoietici , Azienda Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italia
| | - Veronica Agrigento
- a Ospedale V. Cervello, Unità Operativa Complessa (UOC), Ematologia per le Malattie Rare del Sangue e degli Organi Ematopoietici , Azienda Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italia
| | - Rita Barone
- a Ospedale V. Cervello, Unità Operativa Complessa (UOC), Ematologia per le Malattie Rare del Sangue e degli Organi Ematopoietici , Azienda Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italia
| | - Aurelio Maggio
- a Ospedale V. Cervello, Unità Operativa Complessa (UOC), Ematologia per le Malattie Rare del Sangue e degli Organi Ematopoietici , Azienda Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italia
| | - Elena D'Alcamo
- a Ospedale V. Cervello, Unità Operativa Complessa (UOC), Ematologia per le Malattie Rare del Sangue e degli Organi Ematopoietici , Azienda Ospedali Riuniti Villa Sofia-Cervello , Palermo , Italia
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10
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Dash PM, Sahu PK, Patel S, Mashon RS, Kharat KR, Mukherjee MB. Effect of Assorted Globin Haplotypes and α-Thalassemia on the Clinical Heterogeneity of Hb S-β-Thalassemia. Hemoglobin 2018; 42:236-242. [PMID: 30486691 DOI: 10.1080/03630269.2018.1536666] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 10/27/2022]
Abstract
Hemoglobinopathies and thalassemias are the most commonly encountered monogenic disorders of blood in humans, posing a major genetic and public health problem round the globe. Hb S (HBB: c.20A>T)-β-thalassemia (β-thal) is a compound aberrant heterozygosity with inconsistent phenotypic expression, which are poorly described and clinically mapped. Comprehensive genetic characterization of such a population is highly warranted for complete understanding of the clinical heterogeneity, disease prognosis and therapeutic management. In this study, Hb S-β-thal (n = 60) patients, strictly defined by varying degrees of clinical presentations, were selected to evaluate their genotype-phenotype agreement. Furthermore, β-globin (n = 120) and α-globin gene clusters (n = 60) were genetically characterized and statistically correlated with clinical terminologies to explain the clinical heterogeneity. Our results revealed the association of the Arab-Indian haplotypes with nine different frameworks of β-thal together with the modulating role of α-thalassemia (α-thal). The study subjects, including carriers of β-thal haplotype III [- - - - - - -] (8.0%), presented with varying severe patterns of clinical symptoms such as painful crisis, multiple infections and splenomegaly, as an outcome of significantly less Hb F and higher Hb S levels (p < 0.5). The study findings indicated that together with α-thal, β-thal haplotypes and Hb F levels, may possibly provide a close justification to support the clinical heterogeneity in the study population.
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Affiliation(s)
- Preetinanda M Dash
- a Department of Biotechnology, Centre for Advanced Life Sciences , Deogiri College , Aurangabad , Maharashtra , India.,b Sickle Cell Clinic and Malaria Research Centre , Veer Surendra Sai (VSS) Institute of Medical Sciences and Research , Burla, Sambalpur , Odisha , India
| | - Praveen K Sahu
- c Molecular and Immunology Laboratory , Ispat General Hospital , Rourkela , Odisha , India
| | - Siris Patel
- b Sickle Cell Clinic and Malaria Research Centre , Veer Surendra Sai (VSS) Institute of Medical Sciences and Research , Burla, Sambalpur , Odisha , India
| | - Ranjeet S Mashon
- b Sickle Cell Clinic and Malaria Research Centre , Veer Surendra Sai (VSS) Institute of Medical Sciences and Research , Burla, Sambalpur , Odisha , India.,d Department of Haematopathology , Christian Medical College , Ludhiana , India
| | - Kiran R Kharat
- a Department of Biotechnology, Centre for Advanced Life Sciences , Deogiri College , Aurangabad , Maharashtra , India
| | - Malay B Mukherjee
- e Department of Haematogenetics , National Institute of Immuno-Haematology , Parel, Mumbai , India
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11
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NickAria S, Haghpanah S, Ramzi M, Karimi M. Relationship of the Interaction Between Two Quantitative Trait Loci with γ-Globin Expression in β-Thalassemia Intermedia Patients. Hemoglobin 2018; 42:108-112. [PMID: 29745274 DOI: 10.1080/03630269.2018.1463915] [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: 10/16/2022]
Abstract
Globin switching is a significant factor on blood hemoglobin (Hb) level but its molecular mechanisms have not yet been identified, however, several quantitative trait loci (QTL) and polymorphisms involved regions on chromosomes 2p, 6q, 8q and X account for variation in the γ-globin expression level. We studied the effect of interaction between a region on intron six of the TOX gene, chromosome 8q (chr8q) and XmnI locus on the γ-globin promoter, chr11p on γ-globin expression in 150 β-thalassemia intermedia (β-TI) patients, evaluated by statistical interaction analysis. Our results showed a significant interaction between one QTL on intron six of the TOX gene (rs9693712) and XmnI locus that effect γ-globin expression. Interchromosomal interaction mediates through transcriptional machanisms to preserve true genome architectural features, chromosomes localization and DNA bending. This interaction can be a part of the unknown molecular mechanism of globin switching and regulation of gene expression.
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Affiliation(s)
- Shiva NickAria
- a Hematology Research Center , Shiraz University of Medical Sciences , Shiraz , Iran
| | - Sezaneh Haghpanah
- a Hematology Research Center , Shiraz University of Medical Sciences , Shiraz , Iran
| | - Mani Ramzi
- a Hematology Research Center , Shiraz University of Medical Sciences , Shiraz , Iran
| | - Mehran Karimi
- a Hematology Research Center , Shiraz University of Medical Sciences , Shiraz , Iran
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Ghoti H, Fibach E, Rachmilewitz EA, Jeadi H, Filon D. New Insights on β-Thalassemia in the Palestinian Population of Gaza: High Frequency and Milder Phenotype Among Homozygous IVS-I-1 (HBB: c.92+1G>A) Patients with High Levels of Hb F. Hemoglobin 2017; 41:144-146. [PMID: 28670942 DOI: 10.1080/03630269.2017.1339611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 01/21/2023]
Abstract
β-Thalassemia (β-thal) is a very common disease in the Palestinian population of the Gaza Strip. We studied their mutation frequency and clinical features. Thirteen different mutations were identified. The most common mutation was IVS-I-1 (G>A) (HBB: c.92+1G>A), which was prevalent in 31.5% of the thalassemia alleles studied. The IVS-I-110 (G>A) (HBB: c.93-21G>A) mutation was found in 25.0% of the alleles. Homozygotes for the IVS-I-1 mutation had higher mean hemoglobin (Hb) levels, required less blood transfusions, and lower transferrin saturation than the homozygotes for the IVS-I-110 mutation. This milder phenotype was, most likely, the result of the persistent production of Hb F; it was 9-fold higher in absolute terms (g/dL) and 7.7-fold higher in relative terms (percentage of total Hb). About half of our IVS-I-1 patients carried the XmnI polymorphism, which is known to be associated with elevated Hb F levels.
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Affiliation(s)
- Hussam Ghoti
- a Department of Hematology , Augusta Victoria Hospital , Jerusalem , Israel
| | - Eitan Fibach
- a Department of Hematology , Augusta Victoria Hospital , Jerusalem , Israel.,b Department of Hematology , Hadassah, Hebrew University Medical Center , Jerusalem , Israel
| | | | - Hisham Jeadi
- d Department of Hematology , European Hospital of Gaza , Gaza , Palestinian Territory
| | - Dvora Filon
- b Department of Hematology , Hadassah, Hebrew University Medical Center , Jerusalem , Israel
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13
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Lai Y, Chen Y, Chen B, Zheng H, Yi S, Li G, Wei H, He S, Zheng C. Genetic Variants at BCL11A and HBS1L-MYB loci Influence Hb F Levels in Chinese Zhuang β-Thalassemia Intermedia Patients. Hemoglobin 2017; 40:405-410. [PMID: 28361591 DOI: 10.1080/03630269.2016.1253586] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 10/19/2022]
Abstract
Increased Hb F levels can ameliorate the symptoms of β-thalassemia (β-thal). Due to the genetic heterogenicity of β-thal, the relationship between genetic variants in modifier genes and Hb F level has been studied in different populations. The Chinese Zhuang has the second largest population in China and has 6.78% prevalence of β-thal. However, the effects of these single nucleotide polymorphism (SNP) variants on the Hb F levels of β-thal intermedia (β-TI) patients in this population have not been reported. To explore the association between modifier loci (β-globin gene cluster, HBS1L-MYB intergenic region and BCL11A) and Hb F levels in Chinese Zhuang β-TI patients, 96 unrelated β-TI patients (50 males and 46 females) with different Hb F levels were recruited and genotyped by mass spectrometry. A total of 13 SNPs were confirmed to be in a significant relationship with Hb F levels in this population. Of these, high-risk genotypes of six Hb F-associated SNPs, rs9376090, rs7776054, rs9399137, rs9389268, rs9402685 in the HBS1L-MYB intergenic region and rs189984760 in the BCL11A locus, showed association with high Hb F levels, especially for SNPs in linkage disequilibrium. One novel Hb F-associated SNP, rs189984760, was identified in our study. Our findings will be of valuable reference for correlation between modifier genes and Hb F in Chinese Zhuang populations and may lead to better understand the modifying mechanisms for β-thal.
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Affiliation(s)
- Yunli Lai
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Yun Chen
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Biyan Chen
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Haiyang Zheng
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Sheng Yi
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Guojian Li
- b Guangxi Health and Family Planning Commission , Nanning , Guangxi Province , People's Republic of China
| | - Hongwei Wei
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Sheng He
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
| | - Chenguang Zheng
- a Genetic and Metabolic Central Laboratory , Guangxi Zhuang Autonomous Region Women and Children Care Hospital , Nanning , Guangxi Province , People's Republic of China
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14
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Pule GD, Ngo Bitoungui VJ, Chetcha Chemegni B, Kengne AP, Wonkam A. Studies of novel variants associated with Hb F in Sardinians and Tanzanians in sickle cell disease patients from Cameroon. Hemoglobin 2016; 40:377-380. [PMID: 27829299 DOI: 10.1080/03630269.2016.1251453] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 10/20/2022]
Abstract
High level of Hb F has been shown to improve survival in sickle cell disease. Among 453 Cameroonians with sickle cell disease, we have investigated 18 selected single-nucleotide polymorphisms (SNPs) in novel and suggestive loci associated with Hb F level identified through a genomewide association study in sickle cell disease patients in Tanzania, and whole-genome sequencing of a population from Sardinia. Seven of 10 variants reported in Sardinians were either monomorphic or very rare in the Cameroonians. No associations were observed with any SNPs and Hb F levels in Cameroonians affected by sickle cell disease. The present study illustrates the complexity of replicating Hb F-promoting variants association results across populations.
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Affiliation(s)
- Gift D Pule
- a Division of Human Genetics, Department of Pathology, Faculty of Health Sciences , University of Cape Town , Cape Town , South Africa
| | - Valentina J Ngo Bitoungui
- b Department of Microbiology, Hematology, Parasitology et de Infectious Pathologies, Faculty of Medicine and Biomedical Sciences , University of Yaoundé , Cameroon
| | - Bernard Chetcha Chemegni
- b Department of Microbiology, Hematology, Parasitology et de Infectious Pathologies, Faculty of Medicine and Biomedical Sciences , University of Yaoundé , Cameroon
| | - Andre P Kengne
- c Non-Communicable Diseases Research Unit, South African Medical Research Council , Cape Town , South Africa
| | - Ambroise Wonkam
- a Division of Human Genetics, Department of Pathology, Faculty of Health Sciences , University of Cape Town , Cape Town , South Africa
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15
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Orts JA, Zúñiga Á, Bello Y, Fabregat AB, Vicente AI. Hb A 1c Determination by Capillary Electrophoresis is an Efficient Method for Detecting β-Thalassemias and Hemoglobin Variants. Hemoglobin 2016; 40:335-340. [PMID: 27535164 DOI: 10.1080/03630269.2016.1224767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
Glycated hemoglobin (Hb A1c) determination by multicapillary zone electrophoresis (MZE) can additionally be used to detect Hb A2, Hb F and most common hemoglobin (Hb) variants. We assessed the effectiveness of this method for detecting β-thalassemia (β-thal), δβ-thalassemia (δβ-thal) and most common Hb variants. Moreover, Hb F/Hb A2 is evaluated as an index for discriminating between β- and δβ-thal traits. The theoretical β-thalassemia major (β-TM) birth rate in our healthcare area is calculated and contrasted with real data. A MZE technique was used for Hb A1c measurements in 27,724 patients. Previous criteria for carrier detection were established and subsequently confirmed by molecular biology techniques. Positive predictive value (PPV) was 100.0%. The prevalence of β-thal trait (including δβ-thal) was 0.34%. The most prevalent mutations (estimated per 100,000 population) were HBB: c.118C > T (57.7%), HBB: c.93-21G>A (50.5%), HBB: c.92 + 1G > A (43.3%), HBB: c.92 + 6T > C (32.5%) and HBB: c.20delA (18.0%) for β-thalassemias, and Hb S (HBB: c.20A > T) (32.5%) and Hb J-Baltimore (HBB:c.3880T>A) (28.9%) for Hb variants. We found a paradoxical result between the theoretical β-TM birth rate and real data. We calculated an optimal Hb F/Hb A2 index cutoff of 0.71 for discriminating between β- and δβ-thal traits. This method is highly cost-effective for detecting β-thalassemias and common Hb variants. Prevalence results match previous data for the Spanish population. Heterogeneity of mutations in Spain has markedly increased as a consequence of migration. The Hb F/Hb A2 index cutoff could be used to predict δβ-thal trait.
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Affiliation(s)
- Juan A Orts
- a Department of Biochemistry , Hospital Universitario de la Ribera , Alzira , Valencia , Spain
| | - Ángel Zúñiga
- b Department of Molecular Biology , Hospital Universitario de la Ribera , Alzira , Valencia , Spain
| | - Yanis Bello
- b Department of Molecular Biology , Hospital Universitario de la Ribera , Alzira , Valencia , Spain
| | - Aleix B Fabregat
- a Department of Biochemistry , Hospital Universitario de la Ribera , Alzira , Valencia , Spain
| | - Ana I Vicente
- c Department of Hematology , Hospital Universitario de la Ribera , Alzira , Valencia , Spain
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16
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Karimi M, Jooya P, Haghpanah S, Mokhtari M, Rezaei N, Fath M, Parand S. Evaluation of the Relationship Between Hb F Levels and Nucleated Red Blood Cells with Morbidity in Non Transfusion-Dependent Thalassemia Patients. Hemoglobin 2016; 40:250-6. [PMID: 27211282 DOI: 10.1080/03630269.2016.1183212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 01/04/2023]
Abstract
Recognition of risk factors of morbidities in patients with β-thalassemia intermedia (β-TI) is an important issue that must be evaluated. Non transfusion-dependent thalassemia patients referred to the outpatient clinic of Shiraz University of Medical Science, Shiraz, South Iran were enrolled in this study between 2013 and 2014. Two peripheral blood smears were prepared for evaluating developmental stage of normoblasts. One hundred and thirty-one patients with ages ranging from 3 to 42 years (mean: 23.35 ± 7.9) were selected. Sixty-seven patients had at least one morbidity (51.1%). Osteoporosis and gallstones were the most common morbidities (33.6 and 24.4%, respectively). In the univariate model, hemoglobin (Hb), ferritin, Hb F, developmental stage of normoblasts and hydroxyurea (HU) therapy did not differ between patients with and without morbidity (p > 0.05) but mean age of patients and mean number of normoblasts were higher in patients with morbidity (p = 0.026 and p = 0.012, respectively). In the regression model, sex and splenectomy status were different between patients with and without morbidity. It seems that females and splenectomy are risk factors for morbidity in non transfusion-dependent thalassemia patients. [Sex: odds ratio (OR) = 2.21, 95% confidence interval (95% CI): 1.04-4.72, p = 0.39. Splenectomy: OR = 3.10, 95% CI: 1.12-8.59, p = 0.029.] This study shows that Hb F level and developmental stage of normoblasts does not effect the incidence of morbidities in non transfusion-dependent thalassemia patients but sex and splenectomy were effective factors in development of morbidities. Thus, splenectomy should be avoided as much as possible in patients with non transfusion-dependent thalassemia.
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Affiliation(s)
- Mehran Karimi
- a Hematology Research Center, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran
| | - Parisa Jooya
- b Hematology Research Center, Pediatric Department, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran , and
| | - Sezaneh Haghpanah
- a Hematology Research Center, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran
| | - Maral Mokhtari
- c Pathology Department, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran
| | - Narges Rezaei
- a Hematology Research Center, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran
| | - Maede Fath
- b Hematology Research Center, Pediatric Department, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran , and
| | - Shirin Parand
- a Hematology Research Center, Shiraz University of Medical Sciences , Shiraz , Islamic Republic of Iran
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17
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Keyhani E, Jafari Vesiehsari M, Talebi Kakroodi S, Darabi E, Zamani F, Karimlou M, Kamali K, Neishabury M. The Impact of XmnI-HBG2, BCL11A and HBS1L-MYB Single Nucleotide Polymorphisms on Hb F Variation of Hematologically Normal Iranian Individuals. Hemoglobin 2016; 40:198-201. [PMID: 27117569 DOI: 10.3109/03630269.2016.1160920] [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: 11/13/2022]
Abstract
The impact of Hb F on severity of sickle cell disease and β-thalassemia (β-thal) is well documented. The XmnI-HBG2, BCL11A and HBS1L-MYB single nucleotide polymorphisms (SNPs) have been introduced as the most important factors causing variation in fetal hemoglobin (Hb F) levels in different population studies. However, the extent of their effect could be population-specific. In this study, multivariate linear regression analysis was used to evaluate the association of Hb F with age, sex, and eight SNPs, including XmnI-HBG2, four BCL11A, two HBS1L-MYB SNPs and the polymorphic palindromic 5' hypersensitive 4-locus control region (5'HS4-LCR). One hundred and twenty-two hematologically normal individuals, from a previous study cohort, constituted our study population. In multivariate regression analyses, no association of Hb F was observed with age or sex of the individuals and SNPs in this study. We conducted a univariate regression analysis to further investigate the results, which among all the factors only detected XmnI-HBG2 and 5'HS4 SNPs as significant modifiers of Hb F. The significance of these two factors disappeared in a bivariate analysis. These results suggest that either XmnI-HBG2 or 5'HS4-LCR have a stronger contribution in Hb F variations of the Iranian population than BCL11A and HBS1L-MYB SNPs. Furthermore, the effect of low population size and technical limitations on obtained results could not be ruled out.
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Affiliation(s)
- Elaheh Keyhani
- a Genetics Research Center, University of Social Welfare and Rehabilitation Sciences , Tehran , Iran
| | | | - Setareh Talebi Kakroodi
- a Genetics Research Center, University of Social Welfare and Rehabilitation Sciences , Tehran , Iran
| | - Elham Darabi
- b Department of Medical Genetics , School of Medicine, International Campus , Tehran , Iran
| | - Fahimeh Zamani
- a Genetics Research Center, University of Social Welfare and Rehabilitation Sciences , Tehran , Iran
| | - Masoud Karimlou
- c Department of Biostatistics and Computer Sciences , University of Social Welfare and Rehabilitation Sciences , Tehran , Iran
| | - Koorosh Kamali
- d Department of Public Health , School of Public Health, Zanjan University of Medical Sciences , Zanjan , Iran
| | - Maryam Neishabury
- a Genetics Research Center, University of Social Welfare and Rehabilitation Sciences , Tehran , Iran
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18
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Scheps KG, Varela V. [Regulation of the β-globin gene family expression, useful in the search for new therapeutic targets for hemoglobinopathies]. Medicina (B Aires) 2016; 76:383-389. [PMID: 27959850] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
Different hemoglobin isoforms are expressed during the embryonic, fetal and postnatal stages. They are formed by combination of polypeptide chains synthesized from the α- and β-globin gene clusters. Based on the fact that the presence of high hemoglobin F levels is beneficial in both sickle cell disease and severe thalassemic syndromes, a revision of the regulation of the β-globin cluster expression is proposed, especially regarding the genes encoding the y-globin chains (HBG1 and HBG2). In this review we describe the current knowledge about transcription factors and epigenetic regulators involved in the switches of the β-globin cluster. It is expected that the consolidation of knowledge in this field will allow finding new therapeutic targets for the treatment of hemoglobinopathies.
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Affiliation(s)
- Karen G Scheps
- Cátedra de Genética, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina. E-mail:
- INIGEM (Instituto de Inmunología, Genética y Metabolismo), CONICET- Universidad de Buenos Aires, Argentina. E-mail:
| | - Viviana Varela
- Cátedra de Genética, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
- INIGEM (Instituto de Inmunología, Genética y Metabolismo), CONICET- Universidad de Buenos Aires, Argentina
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de Souza Carrocini GC, Venancio LPR, Bonini-Domingos CR. Screening of Transcription Factors Involved in Fetal Hemoglobin Regulation Using Phylogenetic Footprinting. Evol Bioinform Online 2015; 11:239-44. [PMID: 26543346 PMCID: PMC4624090 DOI: 10.4137/ebo.s15364] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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] [Received: 03/11/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 12/23/2022] Open
Abstract
Fetal hemoglobin (Hb F) is an important genetic modulator of the beta-hemoglobinopathies. The regulation of Hb F levels is influenced by transcription factors. We used phylogenetic footprinting to screen transcription factors that have binding sites in HBG1 and HBG2 genes’ noncoding regions in order to know the genetic determinants of the Hb F expression. Our analysis showed 354 conserved motifs in the noncoding regions of HBG1 gene and 231 motifs in the HBG2 gene between the analyzed species. Of these motifs, 13 showed relation to Hb F regulation: cell division cycle-5 (CDC5), myelo-blastosis viral oncogene homolog (c-MYB), transcription factor CP2 (TFCP2), GATA binding protein 1 (GATA-1), GATA binding protein 2 (GATA-2), nuclear factor erythroid 2 (NF-E2), nuclear transcription factor Y (NF-Y), runt-related transcription factor 1 (RUNX-1), T-cell acute lymphocytic leukemia 1 (TAL-1), YY1 transcription factor (YY1), beta protein 1 (BP1), chicken ovalbumin upstream promoter-transcription factor II (COUP-TFII), and paired box 1 (PAX-1). The last three motifs were conserved only in the noncoding regions of the HBG1 gene. The understanding of genetic elements involved in the maintenance of high Hb F levels may provide new efficient therapeutic strategies in the beta-hemoglobinopathies treatment, promoting reduction in clinical complications of these genetic disorders.
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Affiliation(s)
- Gisele Cristine de Souza Carrocini
- Laboratory of Hemoglobin and Genetics of Hematologic Diseases, Department of Biology, São Paulo State University - UNESP/IBILCE, São José do Rio Preto, São Paulo, Brazil
| | - Larissa Paola Rodrigues Venancio
- Laboratory of Hemoglobin and Genetics of Hematologic Diseases, Department of Biology, São Paulo State University - UNESP/IBILCE, São José do Rio Preto, São Paulo, Brazil
| | - Claudia Regina Bonini-Domingos
- Laboratory of Hemoglobin and Genetics of Hematologic Diseases, Department of Biology, São Paulo State University - UNESP/IBILCE, São José do Rio Preto, São Paulo, Brazil
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Unal S, Chui DHK, Gumruk F. Fanconi's Anemia Effect or Sickle Cell Anemia Effect: That is the Question. Hemoglobin 2015; 39:287-9. [PMID: 25976779 DOI: 10.3109/03630269.2015.1041036] [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: 11/13/2022]
Abstract
A 16-year-old boy who was diagnosed to have sickle cell anemia was referred to our center. The parental consanguinity, growth retardation and dysmorphic features prompted a search for possible Fanconi's Anemia (FA). The diepoxybutane (DEB) test was positive, confirming FA. The interaction of both diseases might account for his relatively mild phenotype in terms of both sickle cell anemia (or Hb S, HBB: c.20A > T) and FA. The high Hb F level that might be related to concomitant FA, may have caused a milder phenotype of sickle cell anemia, whereas nitric oxide (NO) depletion as a consequence of sickle cell anemia, may have caused a delay in the bone marrow failure of FA.
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Affiliation(s)
- Sule Unal
- Center for Inherited Bone Marrow Failure Syndromes, Hacettepe University , Ankara , Turkey
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21
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Yao XY, Yu J, Chen SP, Xiao JW, Zheng QC, Liu HY, Zhang L, Xian Y, Zou L. Prevalence and genetic analysis of α-thalassemia and β-thalassemia in Chongqing area of China. Gene 2013; 532:120-4. [PMID: 24055728 DOI: 10.1016/j.gene.2013.09.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 08/15/2013] [Accepted: 09/08/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND AIMS Thalassemia is one of the most common hereditary disorders. This study aimed to investigate the prevalence of thalassemia and the mutation spectrum in Chongqing, the southern area of China. METHODS A total of 1057 children were recruited from Chongqing. Hematological parameters were examined and globin genes were genetically analyzed. RESULTS The total frequency of thalassemia carriers was 7.76% in this group of children. Among these, α-thalassemia was 5.20%, β-thalassemia was 1.99% and abnormal hemoglobin variant was 0.57%. Furthermore, 24 cases of α-triplication were detected, frequency of which was 2.55%. The true prevalence of silent α-thalassemia was first reported in this study. In addition, six novel mutations that give rise to α-thalassemia and two rare abnormal hemoglobin variants were first identified in Chinese population. CONCLUSIONS Our data suggested that the population in Chongqing are at high risk of α- and β-thalassemia. The findings will be useful for genetic counseling and the prevention of severe thalassemias in this area.
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Affiliation(s)
- Xiu-Yun Yao
- Division of Hematology, Children's Hospital, Chongqing Medical University, the Ministry of Education Key Laboratory of Child development and Disorders, Chongqing 400014, China; Key laboratory of Pediatrics in Chongqing, Chongqing 400014, China; Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing 400014, China
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