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Mamata M, Padma G, Pragna Laxmi T, Saroja K, Ashwin D, Suman J. Identification of a Novel Variant c.163delG in HBB Gene Resulting in a Beta Null Phenotype in a Proband with Thalassemia Intermedia. Hemoglobin 2024; 48:1-3. [PMID: 38258429 DOI: 10.1080/03630269.2023.2279609] [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: 08/01/2023] [Accepted: 10/31/2023] [Indexed: 01/24/2024]
Abstract
A 21-year-old patient presented with a previous medical history of pallor, mild icterus, increased fatigue, low hemoglobin, and abnormal hemoglobin variant analysis with more than 70 transfusions. He was referred for genetic analysis to identify the pathogenic variations in the β-globin gene. Sanger's sequencing of the proband and his family revealed the presence of a novel frame shift variant HBB:c.163delG in a compound heterozygous state with hemoglobin E (HbE) (HBB:c.79G > A) variant. The father and the sibling of the patient were found to be normal for the HBB gene. Mother was found to be heterozygous for HbE (HBB:c.79G > A) variant. In silico analysis by Mutalyzer predicted that c.163delG variant generated a premature stop codon after seven codons, leading to a truncated protein. FoldX protein stability analysis showed a positive ΔΔG value of 45.27 kcal/mol suggesting a decrease in protein stability. HBB:c.79G > A is a known variant coding for HbE variant, which results in the reduced synthesis of β-globin chain and shows mild thalassemia. Combined effect of HBB:c.163delG and HBB:c.79G > A variants in the proband might have led to the reduced synthesis of β-globin chains resulting in a thalassemia intermedia type of clinical manifestation.
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Affiliation(s)
- M Mamata
- Kamala Hospital and Research Centre for Thalassemia and Sickle Cell Patients, Hyderabad, India
| | - G Padma
- Kamala Hospital and Research Centre for Thalassemia and Sickle Cell Patients, Hyderabad, India
| | - T Pragna Laxmi
- Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India
| | - K Saroja
- Kamala Hospital and Research Centre for Thalassemia and Sickle Cell Patients, Hyderabad, India
| | - Dalal Ashwin
- Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India
| | - Jain Suman
- Kamala Hospital and Research Centre for Thalassemia and Sickle Cell Patients, Hyderabad, India
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Colah RB, Nadkarni AH, Gorakshakar AC, Sawant PM, Mehta PR, Gorivale MS, Hariharan P, Mohanty D, Ghosh K. The Changing Trends in Prenatal Diagnosis of Hemoglobinopathies in India: The Quest of a Single Center to Reduce the Burden of Disease over Three Decades. Hemoglobin 2021; 45:112-118. [PMID: 33829933 DOI: 10.1080/03630269.2021.1908346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The β-thalassemias and sickle cell disorders pose a considerable health burden in India. Of the more than 10,000 annual births of children with a severe hemoglobinopathy, only around 10.0% are managed optimally. Thus, genetic counseling and prenatal diagnosis (PND) is a valid option for a large and diverse country. Our center was one of the first to initiate PND and we present our experience over 30 years to evaluate the impact of awareness in changing the trends of PND of hemoglobinopathies. Both second and first-trimester diagnoses were undertaken by fetoscopy/cordocentesis and globin biosynthesis/high-performance liquid chromatography (HPLC) analysis of fetal blood and chorionic villus sampling (CVS) and DNA analysis. Over 30 years, 3478 couples (first trimester: 2475; second trimester: 1003) from all over India were offered PND. The number of couples coming in the first trimester increased significantly over each decade and couples coming prospectively increased from 2.5 to 18.4%. A cost-effective stepwise approach was used for molecular analysis. Eight hundred and one fetuses (23.0%) were affected and all except three couples opted for termination of these pregnancies. Genetic counseling and PND is the only way to reduce the burden of disease. With awareness, there was a shift from second trimester to first trimester PND over each decade, with an increasing number of couples coming during the first pregnancy. There are only 15 to 20 centers in India offering PND. We have compared our study with other reports on PND from different regions in India.
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Affiliation(s)
- Roshan B Colah
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Anita H Nadkarni
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Ajit C Gorakshakar
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Pratibha M Sawant
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Pallavi R Mehta
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Manju S Gorivale
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Priya Hariharan
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Dipika Mohanty
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
| | - Kanjaksha Ghosh
- Department of Haematogenetics, Indian Council of Medical Research, National Institute of Immunohaematology, Mumbai, India
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Panja A, Chowdhury P, Chakraborty S, Ghosh TK, Basu A. Cross-Sectional Study for the Detection of Mutations in the Beta-Globin Gene Among Patients with Hemoglobinopathies in the Bengali Population. Genet Test Mol Biomarkers 2017; 21:39-45. [DOI: 10.1089/gtmb.2016.0186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Amrita Panja
- Molecular Biology and Human Genetics Laboratory, Department of Zoology, The University of Burdwan, Burdwan, India
| | - Prosanto Chowdhury
- Peerless Hospital & B.K.Roy Research Centre, Burdwan Medical College and Hospital, Burdwan, India
| | | | - Tapan Kumar Ghosh
- Department of Pathology, Bankura Medical College and Hospital, Bankura, India
| | - Anupam Basu
- Molecular Biology and Human Genetics Laboratory, Department of Zoology, The University of Burdwan, Burdwan, India
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Chatterjee T, Chakravarty A, Chakravarty S. Population Screening and Prevention Strategies for Thalassemias and other Hemoglobinopathies of Eastern India: Experience of 18,166 cases. Hemoglobin 2015; 39:384-8. [DOI: 10.3109/03630269.2015.1068799] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Achoubi N, Asghar M, Saraswathy KN, Murry B. Prevalence of β-Thalassemia and hemoglobin E in two migrant populations of Manipur, North East India. Genet Test Mol Biomarkers 2013; 16:1195-200. [PMID: 23057593 DOI: 10.1089/gtmb.2011.0373] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hemoglobinopathies are a group of inherited single-gene disorders found commonly in the Mediterranean region, Middle East, Indian subcontinent, Burma, and South East Asia. As many as 229 mutation variants of β-thalassemia are reported in the world, many community/region-specific mutations. Very little on thalassemia has been reported in Manipur, a North Eastern Indian state. Thus, a community genetic approach through population screening can be applied to the people of Manipur and a total of 602 blood samples from unrelated Meitei Brahmins (n=300) and Meitei Muslims (n=302) were screened for abnormal hemoglobins by Naked Eye Single Tube Red Cell Osmotic Fragility Test (NESTROFT). HBA(2) level was estimated by using high-performance liquid chromatography and molecular analysis was done by using PCR. Sequencing was also carried out to confirm the mutations. High frequencies of NESTROFT positive (10%) and NESTROFT doubtful (11%) cases were found among the Meitei Brahmins in comparison to the Meitei Muslims [NESTROFT positive (3.31%) and NESTROFT doubtful (1.33%)]. The allele frequency of HB*E was 0.022 and 0.012 among the Meitei Brahmin and Meitei Muslim, respectively. Sequencing of the β-globin gene confirmed a very rare β-thalassemia [-90 C→T (0.33%)] among the Meitei Brahmins of Manipur. This mutation with hemoglobin E in one of the present population hints the presence of the Mongoloid stock among them, possibly from China. There is a need for further studies on other populations of Manipur and the neighboring North East Indian states using such genetic markers.
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Affiliation(s)
- Nongthombam Achoubi
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi, India
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Sarkar AA, Zohn IE. Hectd1 regulates intracellular localization and secretion of Hsp90 to control cellular behavior of the cranial mesenchyme. ACTA ACUST UNITED AC 2012; 196:789-800. [PMID: 22431752 PMCID: PMC3308699 DOI: 10.1083/jcb.201105101] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Hectd1 mutant mouse embryos exhibit the neural tube defect exencephaly associated with abnormal cranial mesenchyme. Cellular rearrangements in cranial mesenchyme are essential during neurulation for elevation of the neural folds. Here we investigate the molecular basis of the abnormal behavior of Hectd1 mutant cranial mesenchyme. We demonstrate that Hectd1 is a functional ubiquitin ligase and that one of its substrates is Hsp90, a chaperone protein with both intra- and extracellular clients. Extracellular Hsp90 enhances migration of multiple cell types. In mutant cranial mesenchyme cells, both secretion of Hsp90 and emigration of cells from cranial mesenchyme explants were enhanced. Importantly, we show that this enhanced emigration was highly dependent on the excess Hsp90 secreted from mutant cells. Together, our data set forth a model whereby increased secretion of Hsp90 in the cranial mesenchyme of Hectd1 mutants is responsible, at least in part, for the altered organization and behavior of these cells and provides a potential molecular mechanism underlying the neural tube defect.
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Affiliation(s)
- Anjali A Sarkar
- Center for Neuroscience Research, Children's Research Institute, Children's National Medical Center, Washington, DC 20010, USA
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Verma IC, Saxena R, Kohli S. Hemoglobinopathies in India—Clinical and Laboratory Aspects. Clin Lab Med 2012; 32:249-62. [DOI: 10.1016/j.cll.2012.04.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Colah R, Gorakshakar A, Phanasgaonkar S, D’Souza E, Nadkarni A, Surve R, Sawant P, Master D, Patel R, Ghosh K, Mohanty D. Epidemiology of β-thalassaemia in Western India: mapping the frequencies and mutations in sub-regions of Maharashtra and Gujarat. Br J Haematol 2010; 149:739-47. [DOI: 10.1111/j.1365-2141.2010.08131.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sinha S, Black ML, Agarwal S, Colah R, Das R, Ryan K, Bellgard M, Bittles AH. Profiling β-thalassaemia mutations in India at state and regional levels: implications for genetic education, screening and counselling programmes. THE HUGO JOURNAL 2010; 3:51-62. [PMID: 21119755 DOI: 10.1007/s11568-010-9132-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 11/29/2009] [Accepted: 01/20/2010] [Indexed: 11/30/2022]
Abstract
UNLABELLED Thalassaemia and sickle cell disease have been recognized by the World Health Organization as important inherited disorders principally impacting on the populations of low income countries. To create a national and regional profile of β-thalassaemia mutations in the population of India, a meta-analysis was conducted on 17 selected studies comprising 8,505 alleles and offering near-national coverage for the disease. At the national level 52 mutations accounted for 97.5% of all β-thalassaemia alleles, with IVSI-5(G>C) the most common disease allele (54.7%). Population stratification was apparent in the mutation profiles at regional level with, for example, the prevalence of IVSI-5(G>C) varying from 44.8% in the North to 71.4% in the East. A number of major mutations, such as Poly A(T>C), were apparently restricted to a particular region of the country, although these findings may in part reflect the variant test protocols adopted by different centres. Given the size and genetic complexity of the Indian population, and with specific mutations for β-thalassaemia known to be strongly associated with individual communities, comprehensive disease registries need to be compiled at state, district and community levels to ensure the efficacy of genetic education, screening and counselling programmes. At the same, time appropriately designed community-based studies are required as a health priority to correct earlier sampling inequities which resulted in the under-representation of many communities, in particular rural and socioeconomically under-privileged groups. ELECTRONIC SUPPLEMENTARY MATERIAL The online version of this article (doi:10.1007/s11568-010-9132-3) contains supplementary material, which is available to authorized users.
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Tamhankar PM, Agarwal S, Arya V, Kumar R, Gupta UR, Agarwal SS. Prevention of homozygous beta thalassemia by premarital screening and prenatal diagnosis in India. Prenat Diagn 2008; 29:83-8. [PMID: 19090545 DOI: 10.1002/pd.2176] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Parag M Tamhankar
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, 226014, India
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Molecular basis of deletional hereditary persistence of fetal hemoglobin and δβ-thalassemia in Indian patients. Clin Chim Acta 2008; 392:69-70. [DOI: 10.1016/j.cca.2008.02.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2008] [Revised: 02/18/2008] [Accepted: 02/19/2008] [Indexed: 11/20/2022]
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Current awareness in prenatal diagnosis. Prenat Diagn 2005; 25:269-74. [PMID: 16007763 DOI: 10.1002/pd.1017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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