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Adachi E, Nakagawa R, Tsuji-Hosokawa A, Gau M, Kirino S, Yogi A, Nakatani H, Takasawa K, Yamaguchi T, Kosho T, Murakami M, Tajima T, Hasegawa T, Yamada T, Morio T, Ohara O, Kashimada K. A MinION-based Long-Read Sequencing Application With One-Step PCR for the Genetic Diagnosis of 21-Hydroxylase Deficiency. J Clin Endocrinol Metab 2024; 109:750-760. [PMID: 37804107 DOI: 10.1210/clinem/dgad577] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/13/2023] [Accepted: 09/26/2023] [Indexed: 10/08/2023]
Abstract
CONTEXT Recently developed long-read sequencing (LRS) technology has been considered an option for CYP21A2 analysis. However, the clinical use of LRS for CYP21A2 analysis is limited. OBJECTIVE This study's objective is to develop an efficient and low-cost LRS system for CYP21A2 screening. METHODS A DNA fragment library was prepared in a single polymerase chain reaction (PCR) that covers the entire CYP21A2 gene and all known junctions caused by TNXB gene structural rearrangements, yielding a single 8-kb product of CYP21A2 or CYP21A1P/CYP21A2 chimera. After barcoding, the PCR products were sequenced on a MinION-based platform with Flongle Flow Cell R9.4.1 and R10.4.1. RESULTS The reference genotypes of 55 patients with 21-hydroxylase deficiency (21OHD) were established using the conventional method with multiplex ligation-dependent probe amplification (MLPA) and nested PCR. LRS using Flongle Flow Cell R9.4.1 yielded consistent results. Additionally, the recently updated LRS "duplex" analysis with Flongle flow cell R10.4.1 was tested to reveal an advantage of accurately sequencing a variant located on the homopolymer region. By introducing a barcode system, the cost was reduced to be comparable to that of conventional analysis. A novel single-nucleotide variation was discovered at the acceptor site of intron 7, c.940-1G > C. We also identified a subtype of the classical chimeric junction CH2, "CH2a," in the region from the latter part of intron 5 to exon 6. CONCLUSION We successfully established a novel low-cost and highly accurate LRS system for 21OHD genetic analysis. Our study provides insight into the feasibility of LRS for diagnosing 21OHD and other genetic diseases caused by structural rearrangements.
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Affiliation(s)
- Eriko Adachi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Ryuichi Nakagawa
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Atsumi Tsuji-Hosokawa
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
- Department of Systems BioMedicine, National Research Institute for Child Health and Development, Tokyo 157-8535, Japan
| | - Maki Gau
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Shizuka Kirino
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Analia Yogi
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Hisae Nakatani
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Kei Takasawa
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Tomomi Yamaguchi
- Center for Medical Genetics, Shinshu University Hospital, Nagano 390-8621, Japan
- Department of Medical Genetics, Shinshu University School of Medicine, Nagano 390-8621, Japan
- Division of Clinical Sequencing, Shinshu University School of Medicine, Nagano 390-8621, Japan
| | - Tomoki Kosho
- Center for Medical Genetics, Shinshu University Hospital, Nagano 390-8621, Japan
- Department of Medical Genetics, Shinshu University School of Medicine, Nagano 390-8621, Japan
- Division of Clinical Sequencing, Shinshu University School of Medicine, Nagano 390-8621, Japan
- Research Center for Supports to Advanced Science, Shinshu University, Nagano 390-8621, Japan
| | - Masanori Murakami
- Department of Molecular Endocrinology and Metabolism, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Toshihiro Tajima
- Department of Pediatrics, Jichi Medical University, Tochigi 329-0498, Japan
| | - Tomonobu Hasegawa
- Department of Pediatrics, Keio University, School of Medicine, Tokyo 160-8582, Japan
| | - Tetsuya Yamada
- Department of Molecular Endocrinology and Metabolism, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Tomohiro Morio
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
| | - Osamu Ohara
- Department of Applied Genomics, Kazusa DNA Research Institute, Chiba 292-0818, Japan
| | - Kenichi Kashimada
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University (TMDU), Tokyo 113-8519, Japan
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Tolba A, Mandour I, Musa N, Elmougy F, Hafez M, Abdelatty S, Ibrahim A, Soliman H, Labib B, Elshiwy Y, Ramzy T, Elsharkawy M. Copy Number Variations in Genetic Diagnosis of Congenital Adrenal Hyperplasia Children. Front Genet 2022; 13:785570. [PMID: 35309130 PMCID: PMC8924405 DOI: 10.3389/fgene.2022.785570] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 01/31/2022] [Indexed: 11/24/2022] Open
Abstract
Background: Congenital adrenal hyperplasia (CAH) is a monogenic disorder caused by genetic diversity in the CYP21A2 gene, with 21-hydroxylase deficiency (21-OHD) as the most common type. Early sex assignment and early diagnosis of different genetic variations with a proper technique are important to reduce mortality and morbidity. Proper early sex identification reduces emotional, social, and psychological stress. Aim: Detection of a spectrum of aberrations in the CYP21A2 gene, including copy number variations, gene conversion, chimeric genes, and point variations. Methods: The CYP21A2 gene was screened using MLPA assay in 112 unrelated Egyptian children with 21-OHD CAH (33 males and 79 females). Results: In the studied group, 79.5% were diagnosed within the first month of life. 46.8% of the genetic females were misdiagnosed as males. Among the copy number variation results, large deletions in 15.4% and three types of chimeric genes in 9% (CH-1, CH-7, and CAH-X CH-1) were detected. Regarding gene dosage, one copy of CYP21A2 was found in 5 cases (4.5%), three copies were detected in 7 cases (6.3%), and one case (0.9%) showed four copies. Eight common genetic variants were identified, I2G, large deletions, large gene conversion (LGC), I172N, F306 + T, -113 SNP, 8bp Del, and exon 6 cluster (V237E and M239K) with an allelic frequency of 32.62%, 15.45%, 7.30%, 3.00%, 2.58%, 2.15%, 0.86%, and 0.86%, respectively. Conclusion: High prevalence of copy number variations highlights the added value of using MLPA in routine laboratory diagnosis of CAH patients.
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Affiliation(s)
- Aisha Tolba
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
| | - Iman Mandour
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
| | - Noha Musa
- Diabetes, Endocrine and Metabolism Pediatric Unit, Cairo University, Giza, Egypt
| | - Fatma Elmougy
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
| | - Mona Hafez
- Diabetes, Endocrine and Metabolism Pediatric Unit, Cairo University, Giza, Egypt
| | - Sahar Abdelatty
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
| | - Amany Ibrahim
- Diabetes, Endocrine and Metabolism Pediatric Unit, Cairo University, Giza, Egypt
| | - Hend Soliman
- Diabetes, Endocrine and Metabolism Pediatric Unit, Cairo University, Giza, Egypt
| | - Bahaaeldin Labib
- Royal College of Surgeons in Ireland, Medical University of Bahrain, Giza, Egypt
| | - Yasmine Elshiwy
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
| | - Tarek Ramzy
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
| | - Marwa Elsharkawy
- Clinical and Chemical Pathology Department, Cairo University, Giza, Egypt
- *Correspondence: Marwa Elsharkawy,
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Mahmoud RAA, Amr NH, Toaima NN, Kamal TM, Elsedfy HH. Genotypic spectrum of 21-hydroxylase deficiency in an endogamous population. J Endocrinol Invest 2022; 45:347-359. [PMID: 34341969 DOI: 10.1007/s40618-021-01648-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/19/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Congenital adrenal hyperplasia (CAH) due to autosomal recessive 21-hydroxylase deficiency (21-OHD) is caused by defects in the CYP21 (CYP21A2) gene. Several mutations have been identified in the CYP21 (CYP21A2) gene of patients with 21-OHD. We aimed at determining the frequency of these mutations among a group of Egyptian patients and studying the genotype-phenotype correlation. METHODS Forty-seven patients with CAH due to 21-OHD from 42 different families diagnosed by clinical and hormonal evaluation and classified accordingly into salt wasting (SW) and simple virilizing (SV) phenotypes were enrolled. Their ages ranged between 1.78 and 18.99 years. Molecular analysis of the CYP21 (CYP21A2) gene was performed for the detection of eleven common mutations: P30L, I2 splice (I2 G), Del 8 bp E3 (G110del8nt), I172N, cluster E6 (I236N, V237E, M239K), V281L, L307 frameshift (F306 + T), Q318X, R356W, P453S, R483P by polymerase chain reaction (PCR) and reverse hybridization. RESULTS Disease-causing mutations were identified in 47 patients, 55.31% of them were compound heterozygous. The most frequent mutations were I2 splice (25.43%), followed by cluster E6 (16.66%) and P30L (15.78%). Two point mutations (P453S, R483P) were not identified in any patient. In the SW patients, genotypes were more compatible with their phenotypes. CONCLUSION Molecular characterization should be considered along with clinical and biochemical diagnosis of CAH since it could confirm the diagnosis, outline the treatment strategy and morbidity, and ensure proper genetic counseling.
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Affiliation(s)
- R A A Mahmoud
- Department of Pediatrics, Ain Shams University, Children's Hospital, Abbassiah Square, Cairo, Egypt.
| | - N H Amr
- Department of Pediatrics, Ain Shams University, Children's Hospital, Abbassiah Square, Cairo, Egypt
| | - N N Toaima
- Department of Pediatrics, Ain Shams University, Children's Hospital, Abbassiah Square, Cairo, Egypt
| | - T M Kamal
- Genetics Unit, Department of Pediatrics, Ain Shams University, Cairo, Egypt
| | - H H Elsedfy
- Department of Pediatrics, Ain Shams University, Children's Hospital, Abbassiah Square, Cairo, Egypt
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Wang W, Han R, Yang Z, Zheng S, Li H, Wan Z, Qi Y, Sun S, Ye L, Ning G. Targeted gene panel sequencing for molecular diagnosis of congenital adrenal hyperplasia. J Steroid Biochem Mol Biol 2021; 211:105899. [PMID: 33864926 DOI: 10.1016/j.jsbmb.2021.105899] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 04/05/2021] [Accepted: 04/08/2021] [Indexed: 10/21/2022]
Abstract
CONTEXT Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive genetic diseases caused by genetic deficiency in nine genes encoding steroidogenesis enzymes and cofactors. OBJECTIVE To establish a targeted next-generation sequencing (NGS) assay for all nine CAH candidate genes. METHODS We developed a customized targeted NGS assay of CAH candidate genes (CYP21A2, CYP17A1, CYP11B1, StAR, CYP11A1, POR, HSD3B2, H6PD, CYP11B2) and apply this assay plus MLPA of CYP21A2 in a total of 469 patients with CAH like signs and symptoms. RESULTS We totally identified 125 variants with seven variant types in eight genes. Variant types included missense variant (46.8 %), splicing variant (21.5 %), small indel (12.5 %), large structure variation (11.8 %), nonsense variant (4.1 %), UTR variant (2.9 %), synonymous variant (0.3 %). Successful genotyping, defined as biallelic pathogenic or likely pathogenic variants, was achieved in 98.5 % (336/341) of cases, including biallelic variants in CYP21A2 (n = 254), CYP17A1 (n = 45), CYP11B1 (n = 23), StAR (n = 7), HSD3B2 (n = 4), POR (n = 1), CYP11A1 (n = 1) and CYP11B2 (n = 1) gene. Importantly, the assay found one patient with CYP11B1 deficiency, one patient with non-classic POR deficiency and two patients with non-classic CYP17A1 deficiency while clinically diagnosed differently. CONCLUSIONS Our NGS-based assay plus MLPA of CYP21A2 is a useful tool to genotype all subtypes of CAH. The test successfully achieved genotype in 98.5 % of patients with clinically determined CAH. It also efficiently facilitated the diagnosis of CAH in patients with rare subtypes as well as non-classic phenotypes.
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Affiliation(s)
- Wencui Wang
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Rulai Han
- Shanghai Institute of Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Zuwei Yang
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Sichang Zheng
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Haorong Li
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Zhihan Wan
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Yan Qi
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China
| | - Shouyue Sun
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China.
| | - Lei Ye
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao Tong University School of Medicine, Ruijin Hospital, Shanghai National Clinical Center for Endocrine and Metabolic Diseases, Shanghai, 200025, PR China.
| | - Guang Ning
- Shanghai Institute of Endocrine and Metabolic Diseases, Shanghai, 200025, PR China.
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Molecular Analysis of 21-Hydroxylase Deficiency Reveals Two Novel Severe Genotypes in Affected Newborns. Mol Diagn Ther 2021; 25:327-337. [PMID: 33710594 DOI: 10.1007/s40291-021-00520-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND OBJECTIVE Congenital adrenal hyperplasia involves a series of autosomal recessive disorders where adrenal steroidogenesis is affected. We present a detailed molecular investigation of 13 newborns affected from the severe form of congenital adrenal hyperplasia related to 21-hydroxylase deficiency. METHODS All patients were diagnosed with classical congenital adrenal hyperplasia in the neonatal period due to adrenal crisis and/or ambiguous genitalia presentation. None of the infants was identified through a congenital adrenal hyperplasia newborn screening program. A molecular analysis of the CYP21A2 gene and a familiar segregation analysis were performed. RESULTS Adrenal crisis was the most severe manifestation in the male salt-wasting newborns while all female patients presented with atypical genitalia. Newborns were correctly genotyped and no genotype-phenotype divergences were found. Two novel severe genotypes, not previously reported, were identified. The novel CYP21A2 frameshift mutations (c.793delG and c.297dupG) were added to the other 45 variants recently reported in the literature, leading to a total count of 279 pathogenic variants affecting the gene. CONCLUSIONS We have successfully genotyped 13 infants diagnosed with classical congenital adrenal hyperplasia after birth. Our molecular approach led to the identification of two novel frameshift CYP21A2 pathogenic variants related to the salt-wasting form of congenital adrenal hyperplasia.
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We All Have a Role to Play: Redressing Inequities for Children Living with CAH and Other Chronic Health Conditions of Childhood in Resource-Poor Settings. Int J Neonatal Screen 2020; 6:ijns6040076. [PMID: 33124614 PMCID: PMC7711668 DOI: 10.3390/ijns6040076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 01/12/2023] Open
Abstract
CLAN (Caring and Living as Neighbours) is an Australian-based non-governmental organisation (NGO) committed to equity for children living with chronic health conditions in resource-poor settings. Since 2004, CLAN has collaborated with a broad range of partners across the Asia Pacific region to improve quality of life for children living with congenital adrenal hyperplasia (CAH). This exploratory case study uses the Knowledge to Action (KTA) framework to analyse CLAN's activities for children living with CAH in the Asia Pacific. The seven stages of the KTA action cycle inform a systematic examination of comprehensive, collaborative, sustained actions to address a complex health challenge. The KTA framework demonstrates the "how" of CLAN's approach to knowledge creation and exchange, and the centrality of community development to multisectoral collaborative action across a range of conditions, cultures and countries to redressing child health inequities. This includes a commitment to: affordable access to essential medicines and equipment; education, research and advocacy; optimisation of medical management; encouragement of family support groups; efforts to reduce financial burdens; and ethical, transparent program management as critical components of success. Improvements in quality of life and health outcomes are achievable for children living with CAH and other chronic health conditions in resource-poor settings. CLAN's strategic framework for action offers a model for those committed to #LeaveNoChildBehind.
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Concolino P. Issues with the Detection of Large Genomic Rearrangements in Molecular Diagnosis of 21-Hydroxylase Deficiency. Mol Diagn Ther 2020; 23:563-567. [PMID: 31317337 DOI: 10.1007/s40291-019-00415-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
More than 95% of congenital adrenal hyperplasia (CAH) cases are associated with mutations in the 21-hydroxylase gene (CYP21A2) in the human leukocyte antigen (HLA) class III area on the short arm of chromosome 6p21.3. In the diagnosis of 21-hydroxylase deficiency, CYP21A2 genotyping is a valuable complement to biochemical investigations. Genotyping can confirm the diagnosis (or carrier state) and, at the same time, provide accurate phenotype prediction in patients carrying severe mutations. In addition, the use of genetic testing is also helpful in prenatal diagnosis where the goal of prenatal treatment is preventing genital virilization of the female fetus. An in-depth knowledge of CYP21A2 genetics is essential to assure the correct interpretation of results obtained. To date, more than 200 small pathogenic variants of the CYP21A2 gene have been reported, showing good agreement between clinical phenotype and patient genotype. Recently, novel CYP21A2 deletions, involving one or more exons, have been reported in different populations. Since these rearrangements have never been described before in the genetic history of 21-hydroxylase deficiency, these new deletions have aroused particular interest. However, it is possible that these novel rearrangements are the result of incorrect interpretation of multiplex ligation-dependent probe amplification (MLPA).
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Affiliation(s)
- Paola Concolino
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168, Rome, Italy.
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Chi DV, Tran TH, Nguyen DH, Luong LH, Le PT, Ta MH, Ngo HTT, Nguyen MP, Le-Anh TP, Nguyen DP, Bui TH, Ta VT, Tran VK. Novel variants of CYP21A2 in Vietnamese patients with congenital adrenal hyperplasia. Mol Genet Genomic Med 2019; 7:e623. [PMID: 30816000 PMCID: PMC6503067 DOI: 10.1002/mgg3.623] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/28/2019] [Accepted: 02/11/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Congenital adrenal hyperplasia (CAH) (OMIM #201910) is a complex disease most often caused by pathogenic variant of the CYP21A2 gene. We have designed an efficient multistep approach to diagnose and classify CAH cases due to CYP21A2 variant and to study the genotype-phenotype relationship. METHODS A large cohort of 212 Vietnamese patients from 204 families was recruited. We utilized Multiplex Ligation-dependent Probe Amplification to identify large deletion or rearrangement followed by complete gene sequencing of CYP21A2 to map single-nucleotide changes and possible novel variants. RESULTS Pathogenic variants were identified in 398 out of 408 alleles (97.5%). The variants indexed span across most of the CYP21A2 gene regions. The most common genotypes were: I2g/I2g (15.35%); Del/Del (14.4%); Del/I2g (10.89%); p.R356W/p.R356W (6.44%); and exon 1-3 del/exon 1-3 del (5.44%). In addition to the previously characterized and documented variants, we also discovered six novel variants which were not previously reported, in silico tools were used to support the pathogenicity of these variants. CONCLUSION The result will contribute in further understanding the genotype-phenotype relationship of CAH patients and to guide better treatment and management of the affected.
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Affiliation(s)
- Dung V Chi
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,National Pediatric Hospital, Hanoi, Vietnam
| | - Thinh H Tran
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,Hanoi Medical University Hospital, Hanoi, Vietnam
| | - Duc H Nguyen
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,Hanoi Medical University Hospital, Hanoi, Vietnam
| | - Long H Luong
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Phuong T Le
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Minh H Ta
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Huong T T Ngo
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,National Pediatric Hospital, Hanoi, Vietnam
| | | | - Tuan P Le-Anh
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Dat P Nguyen
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,National Pediatric Hospital, Hanoi, Vietnam
| | - The-Hung Bui
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,Clinical Genetics Unit, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Van T Ta
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam.,Hanoi Medical University Hospital, Hanoi, Vietnam
| | - Van K Tran
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
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