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Ngoc CTB, Dung VC, De Franco E, Lan NN, Thao BP, Khanh NN, Flanagan SE, Craig ME, Hoang NH, Dien TM. Genetic Etiology of Neonatal Diabetes Mellitus in Vietnamese Infants and Characteristics of Those With INS Gene Mutations. Front Endocrinol (Lausanne) 2022; 13:866573. [PMID: 35518939 PMCID: PMC9063464 DOI: 10.3389/fendo.2022.866573] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/09/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Neonatal diabetes mellitus (NDM) is a rare (1:90,000 newborns) but potentially devastating metabolic disorder characterized by hyperglycemia combined with low levels of insulin. Dominantly-acting insulin (INS) gene mutations cause permanent NDM through single amino acid changes in the protein sequence leading to protein misfolding, which is retained within the endoplasmic reticulum (ER), causing ER stress and β-cell apoptosis. Over 90 dominantly-acting INS gene mutations have been identified in individuals with permanent NDM. PATIENTS AND METHODS The study included 70 infants diagnosed with NDM in the first year of life between May 2008 and May 2021 at the Vietnam National Children's Hospital. Sequencing analysis of all the genes known to cause NDM was performed at the Exeter Genomic Laboratory, UK. Clinical characteristics, molecular genetics, and annual data relating to glycemic control (HbA1c) and severe hypoglycemia of those with INS mutations were collected. The main outcomes of interest were HbA1c, daily insulin dose, growth, and cognitive/motor development. RESULTS Fifty-five of 70 infants (78.5%) with NDM harbored a mutation in a known disease-causing gene and of these, 10 had six different de novo heterozygous INS mutations. Mean gestational age was 38.1 ± 2.5 weeks and mean birth weight was 2.8 ± 0.5 g. They presented with NDM at 20 ± 17 weeks of age; 6/10 had diabetic ketoacidosis with pH 7.13 ± 0.26; plasma glucose level 32.6 ± 14.3 mmol/l and HbA1C 81 ± 15% mmol/mol. After 5.5 ± 4.8 years of insulin treatment, 9/10 have normal development with a developmental quotient of 80-100% and HbA1C 64 ± 7.3 mmol/mol, 9/10 have normal height, weight, and BMI on follow-up. CONCLUSIONS We report a series of Vietnamese NDM cases with dominant INS mutations. INS mutations are the third commonest cause of permanent NDM. We recommend screening of the INS gene in all children diagnosed with diabetes in the first year of life.
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Affiliation(s)
- Can Thi Bich Ngoc
- The Center of Endocrinology, Metabolism, Genetics, and Molecular Therapy, Vietnam National Children’s Hospital, Hanoi, Vietnam
- Pediatric Department, Hanoi Medical University, Hanoi, Vietnam
| | - Vu Chi Dung
- The Center of Endocrinology, Metabolism, Genetics, and Molecular Therapy, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Elisa De Franco
- Institute of Biomedical and Clinical Science, College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Nguyen Ngoc Lan
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Bui Phuong Thao
- The Center of Endocrinology, Metabolism, Genetics, and Molecular Therapy, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Nguyen Ngoc Khanh
- The Center of Endocrinology, Metabolism, Genetics, and Molecular Therapy, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Sarah E. Flanagan
- Institute of Biomedical and Clinical Science, College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Maria E. Craig
- Institute of Endocrinology and Diabetes, The Children’s Hospital at Westmead/Discipline of Child and Adolescent Health, University of Sydney, Sydney, NSW, Australia
- School of Clinical Medicine, University of New South Wales Medicine and Health, Discipline of Paediatrics and Child Health, Sydney, NSW, Australia
| | - Nguyen Huy Hoang
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tran Minh Dien
- The Center of Endocrinology, Metabolism, Genetics, and Molecular Therapy, Vietnam National Children’s Hospital, Hanoi, Vietnam
- *Correspondence: Tran Minh Dien,
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Ngoc CTB, Dien TM, De Franco E, Ellard S, Houghton JAL, Lan NN, Thao BP, Khanh NN, Flanagan SE, Craig ME, Dung VC. Molecular Genetics, Clinical Characteristics, and Treatment Outcomes of K ATP-Channel Neonatal Diabetes Mellitus in Vietnam National Children's Hospital. Front Endocrinol (Lausanne) 2021; 12:727083. [PMID: 34566892 PMCID: PMC8458931 DOI: 10.3389/fendo.2021.727083] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 08/16/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Neonatal diabetes mellitus (NDM) is defined as insulin-requiring persistent hyperglycemia occurring within the first 6 months of life, which can result from mutations in at least 25 different genes. Activating heterozygous mutations in genes encoding either of the subunits of the ATP-sensitive K+ channel (KATP channel; KCNJ11 or ABCC8) of the pancreatic beta cell are the most common cause of permanent NDM and the second most common cause of transient NDM. Patients with NDM caused by KATP channel mutations are sensitive to sulfonylurea (SU) treatment; therefore, their clinical management can be improved by replacing insulin with oral agents. PATIENTS AND METHODS Seventy patients were diagnosed with NDM between May 2008 and May 2021 at Vietnam National Children's Hospital, and molecular genetic testing for all genes known to cause NDM was performed at the Exeter Genomic Laboratory, UK. Patients with ABCC8 or KCNJ11 mutations were transferred from insulin to oral SU. Clinical characteristics, molecular genetics, and annual data relating to glycemic control, SU dose, severe hypoglycemia, and side effects were collected. The main outcomes of interest were SU dose, SU failure (defined as permanent reintroduction of daily insulin), and glycemic control (HbA1c). RESULTS Fifty-four of 70 patients (77%) with NDM harbored a genetic mutation and of these; 27 (50%) had activating heterozygous mutations in ABCC8 or KCNJ11. A total of 21 pathogenic mutations were identified in the 27 patients, including 13 mutations in ABCC8 and 8 mutations in KCNJ11. Overall, 51% had low birth weight (below 3rd percentile), 23 (85%) were diagnosed before 3 months of age, and 23 (85%) presented with diabetic ketoacidosis. At diagnosis, clinical and biochemical findings (mean ± SD) were pH 7.16 ± 0.16; HCO3- , 7.9 ± 7.4 mmol/L; BE, -17.9 ± 9.1 mmol/L; HbA1C, 7.98% ± 2.93%; blood glucose, 36.2 ± 12.3 mmol/L; and C-peptide median, 0.09 (range, 0-1.61 nmol/l). Twenty-six patients were successfully transferred from insulin to SU therapy. In the remaining case, remission of diabetes occurred prior to transfer. Glycemic control on SU treatment was better than on insulin treatment: HbA1c and blood glucose level decreased from 7.58% ± 4.63% and 19.04 ± 14.09 mmol/L when treated with insulin to 5.8 ± 0.94% and 6.87 ± 3.46 mmol/L when treated with SU, respectively. CONCLUSIONS This is the first case series of NDM patients with ABCC8/KCNJ11 mutations reported in Vietnam. SU is safe in the short term for these patients and more effective than insulin therapy, consistent with all studies to date. This is relevant for populations where access to and cost of insulin are problematic, reinforcing the importance of genetic testing for NDM.
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Affiliation(s)
- Can Thi Bich Ngoc
- Department of Endocrinology, Metabolism and Genetics, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Tran Minh Dien
- Department of Endocrinology, Metabolism and Genetics, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Elisa De Franco
- Institute of Biomedical and Clinical Science, College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Sian Ellard
- Institute of Biomedical and Clinical Science, College of Medicine and Health, University of Exeter, Exeter, United Kingdom
- Exeter Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Jayne A. L. Houghton
- Exeter Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Nguyen Ngoc Lan
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Bui Phuong Thao
- Department of Endocrinology, Metabolism and Genetics, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Nguyen Ngoc Khanh
- Department of Endocrinology, Metabolism and Genetics, Vietnam National Children’s Hospital, Hanoi, Vietnam
| | - Sarah E. Flanagan
- Institute of Biomedical and Clinical Science, College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Maria E. Craig
- Institute of Endocrinology and Diabetes, The Children’s Hospital at Westmead/Discipline of Child and Adolescent Health, University of Sydney, Sydney, NSW, Australia
- School of Women’s and Children’s Health, University of New South Wales Medicine, Sydney, NSW, Australia
| | - Vu Chi Dung
- Department of Endocrinology, Metabolism and Genetics, Vietnam National Children’s Hospital, Hanoi, Vietnam
- *Correspondence: Vu Chi Dung,
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Nguyen NL, Thi Bich Ngoc C, Dung Vu C, Van Tung N, Hoang Nguyen H. A novel frameshift PHKA2 mutation in a family with glycogen storage disease type IXa: A first report in Vietnam and review of literature. Clin Chim Acta 2020; 508:9-15. [PMID: 32387637 DOI: 10.1016/j.cca.2020.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 04/21/2020] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND Glycogen storage diseases (GSDs) are clinically and genetically heterogeneous disorders. Overlapping features between liver GSDs are a major challenge in the clinical diagnosis of them. Genetic testing can provide an early and accurate diagnosis of patients suspected with GSDs. CASE PRESENTATION In this study, we report two siblings born to healthy, non-consanguineous Vietnamese parents with hepatomegaly. The proband presented with hepatomegaly, normal spleen, elevated transaminases, without hypoglycemia, normal lactate dehydrogenase and creatine kinase. Liver biopsy revealed degeneration and swollen hepatocytes, suggesting a diagnosis with GSDs. METHODS Whole exome sequencing was applied to identify genetic variants in the proband. Variant validation and familial co-segregation analysis were examined using Sanger sequencing. RESULTS A novel frameshift duplication mutation c.3308_3312dupATGTC (p.L1105Mfs*11) of the PHKA2 gene was identified in the proband and his elder brother at the hemizygous state. This mutation was inherited from their mother. Their father and younger brother were normal genotype. CONCLUSIONS The two siblings were accurately diagnosed with GSD type XIa. This is the first case report of GSD type IXa in Vietnamese patients with a mutation in the PHKA2 gene. This finding may support for genetics diagnosis of unknown cause of hepatomegaly.
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Affiliation(s)
- Ngoc-Lan Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Viet Nam; Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Viet Nam
| | - Can Thi Bich Ngoc
- Center for Rare Diseases and Newborn Screening, Department of Endocrinology, Metabolism and Genetics, Vietnam National Hospital of Pediatrics, 18/879 La Thanh str., Dong Da, Hanoi 100000, Viet Nam
| | - Chi Dung Vu
- Center for Rare Diseases and Newborn Screening, Department of Endocrinology, Metabolism and Genetics, Vietnam National Hospital of Pediatrics, 18/879 La Thanh str., Dong Da, Hanoi 100000, Viet Nam
| | - Nguyen Van Tung
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Viet Nam
| | - Huy Hoang Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Viet Nam; Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Viet Nam.
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Thanh DC, Ngoc CTB, Nguyen NL, Vu CD, Tung NV, Nguyen HH. De novo NIPBL Mutations in Vietnamese Patients with Cornelia de Lange Syndrome. ACTA ACUST UNITED AC 2020; 56:medicina56020076. [PMID: 32074972 PMCID: PMC7073647 DOI: 10.3390/medicina56020076] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 01/29/2020] [Accepted: 02/10/2020] [Indexed: 11/16/2022]
Abstract
Cornelia de Lange Syndrome (CdLS) is a rare congenital genetic disease causing abnormal unique facial phenotypes, several defects in organs and body parts, and mental disorder or intellectual disorder traits. Main causes of CdLS have been reported as variants in cohesin complex genes, in which mutations in the NIPBL gene have been estimated to account for up to 80%. Our study included three Vietnamese patients with typical CdLS phenotypes. Whole exome sequencing revealed two known heterozygous mutations c.6697G>A (p.Val2233Met) and c.2602C>T (p.Arg868X), and a novel heterozygous mutation c.4504delG (p.Val1502fsX87) in the NIPBL gene of the three patients. In silico analyses of the identified mutations predicted possible damaging and truncating effects on the NIPBL protein. Inherited analyses in the patients' families showed that all of the mutations are de novo. Our results lead a definitive diagnosis of patients with CdLS and expand the spectrum of mutations in the NIPBL gene. These findings also confirm whole exome sequencing is an efficient tool for genetic screening of CdLS.
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Affiliation(s)
- Duong Chi Thanh
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Vietnam; (D.C.T.); (N.-L.N.); (N.V.T.)
| | - Can Thi Bich Ngoc
- Center for Rare Diseases and Newborn Screening, Department of Endocrinology, Metabolism and Genetics, Vietnam National Hospital of Pediatrics, 18/879 La Thanh str., Dong Da, Hanoi 100000, Vietnam; (C.T.B.N.); (C.D.V.)
| | - Ngoc-Lan Nguyen
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Vietnam; (D.C.T.); (N.-L.N.); (N.V.T.)
| | - Chi Dung Vu
- Center for Rare Diseases and Newborn Screening, Department of Endocrinology, Metabolism and Genetics, Vietnam National Hospital of Pediatrics, 18/879 La Thanh str., Dong Da, Hanoi 100000, Vietnam; (C.T.B.N.); (C.D.V.)
| | - Nguyen Van Tung
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Vietnam; (D.C.T.); (N.-L.N.); (N.V.T.)
| | - Huy Hoang Nguyen
- Institute of Genome Research, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet str., Cau Giay, Hanoi 100000, Vietnam; (D.C.T.); (N.-L.N.); (N.V.T.)
- Correspondence: ; Tel.: +84-243-7918012
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5
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Begemann M, Rezwan FI, Beygo J, Docherty LE, Kolarova J, Schroeder C, Buiting K, Chokkalingam K, Degenhardt F, Wakeling EL, Kleinle S, González Fassrainer D, Oehl-Jaschkowitz B, Turner CLS, Patalan M, Gizewska M, Binder G, Bich Ngoc CT, Chi Dung V, Mehta SG, Baynam G, Hamilton-Shield JP, Aljareh S, Lokulo-Sodipe O, Horton R, Siebert R, Elbracht M, Temple IK, Eggermann T, Mackay DJG. Maternal variants in NLRP and other maternal effect proteins are associated with multilocus imprinting disturbance in offspring. J Med Genet 2018; 55:497-504. [PMID: 29574422 PMCID: PMC6047157 DOI: 10.1136/jmedgenet-2017-105190] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [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: 12/01/2017] [Revised: 01/16/2018] [Accepted: 02/15/2018] [Indexed: 12/12/2022]
Abstract
Background Genomic imprinting results from the resistance of germline epigenetic marks to reprogramming in the early embryo for a small number of mammalian genes. Genetic, epigenetic or environmental insults that prevent imprints from evading reprogramming may result in imprinting disorders, which impact growth, development, behaviour and metabolism. We aimed to identify genetic defects causing imprinting disorders by whole-exome sequencing in families with one or more members affected by multilocus imprinting disturbance. Methods Whole-exome sequencing was performed in 38 pedigrees where probands had multilocus imprinting disturbance, in five of whom maternal variants in NLRP5 have previously been found. Results We now report 15 further pedigrees in which offspring had disturbance of imprinting, while their mothers had rare, predicted-deleterious variants in maternal effect genes, including NLRP2, NLRP7 and PADI6. As well as clinical features of well-recognised imprinting disorders, some offspring had additional features including developmental delay, behavioural problems and discordant monozygotic twinning, while some mothers had reproductive problems including pregnancy loss. Conclusion The identification of 20 putative maternal effect variants in 38 families affected by multilocus imprinting disorders adds to the evidence that maternal genetic factors affect oocyte fitness and thus offspring development. Testing for maternal-effect genetic variants should be considered in families affected by atypical imprinting disorders.
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Affiliation(s)
- Matthias Begemann
- Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
| | - Faisal I Rezwan
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - Jasmin Beygo
- Institute of Human Genetics, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Louise E Docherty
- MRC Human Genetics Unit, The Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Julia Kolarova
- Institute of Human Genetics, University of Ulm, Ulm, Germany
| | - Christopher Schroeder
- Institute of Human Genetics, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Karin Buiting
- Institute of Human Genetics, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Kamal Chokkalingam
- Department of Diabetic Medicine, Nottingham University Hospital NHS Trust, Nottingham, UK
| | | | - Emma L Wakeling
- North West Thames Regional Genetics Service, London North West Healthcare NHS Trust, London, UK
| | | | | | | | - Claire L S Turner
- Peninsula Genetics Service, Royal Devon and Exeter Hospital, Exeter, UK
| | - Michal Patalan
- Department of Pediatrics, Endocrinology, Diabetology, Metabolic Diseases and Cardiology, Pomeranian Medical University, Szczecin, Poland
| | - Maria Gizewska
- Department of Pediatrics, Endocrinology, Diabetology, Metabolic Diseases and Cardiology, Pomeranian Medical University, Szczecin, Poland
| | - Gerhard Binder
- Pediatric Endocrinology, University Children's Hospital, Tübingen, Germany
| | - Can Thi Bich Ngoc
- Department of Medical Genetics, Metabolism and Endocrinology, The National Children's Hospital, Hanoi, Vietnam
| | - Vu Chi Dung
- Department of Medical Genetics, Metabolism and Endocrinology, The National Children's Hospital, Hanoi, Vietnam
| | - Sarju G Mehta
- Department of Clinical Genetics, Cambridge University Hospitals Trust, Cambridge, UK
| | - Gareth Baynam
- School of Paediatrics and Child Health, The University of Western Australia, Perth, Western Australia, Australia.,Genetic Services of Western Australian and Western Australian Register of Developmental Anomalies, Perth, Western Australia, Australia
| | | | - Sara Aljareh
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - Oluwakemi Lokulo-Sodipe
- Faculty of Medicine, University of Southampton, Southampton, UK.,Wessex Clinical Genetics Service, University Hospital, Southampton, UK
| | - Rachel Horton
- Faculty of Medicine, University of Southampton, Southampton, UK.,Wessex Clinical Genetics Service, University Hospital, Southampton, UK
| | - Reiner Siebert
- Institute of Human Genetics, University of Ulm, Ulm, Germany
| | - Miriam Elbracht
- Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
| | - Isabel Karen Temple
- Faculty of Medicine, University of Southampton, Southampton, UK.,Wessex Clinical Genetics Service, University Hospital, Southampton, UK
| | - Thomas Eggermann
- Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
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Flanagan SE, Dũng VC, Houghton JAL, De Franco E, Ngoc CTB, Damhuis A, Ashcroft FM, Harries LW, Ellard S. An ABCC8 Nonsense Mutation Causing Neonatal Diabetes Through Altered Transcript Expression. J Clin Res Pediatr Endocrinol 2017; 9:260-264. [PMID: 28663158 PMCID: PMC5596808 DOI: 10.4274/jcrpe.4624] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The pancreatic ATP-sensitive K+ (K-ATP) channel is a key regulator of insulin secretion. Gain-of-function mutations in the genes encoding the Kir6.2 (KCNJ11) and SUR1 (ABCC8) subunits of the channel cause neonatal diabetes, whilst loss-of-function mutations in these genes result in congenital hyperinsulinism. We report two patients with neonatal diabetes in whom we unexpectedly identified recessively inherited loss-of-function mutations. The aim of this study was to investigate how a homozygous nonsense mutation in ABCC8 could result in neonatal diabetes. The ABCC8 p.Glu747* was identified in two unrelated Vietnamese patients. This mutation is located within the in-frame exon 17 and RNA studies confirmed (a) the absence of full length SUR1 mRNA and (b) the presence of the alternatively spliced transcript lacking exon 17. Successful transfer of both patients to sulphonylurea treatment suggests that the altered transcript expression enhances the sensitivity of the K-ATP channel to Mg-ADP/ATP. This is the first report of an ABCC8 nonsense mutation causing a gain-of-channel function and these findings extend the spectrum of K-ATP channel mutations observed in patients with neonatal diabetes.
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Affiliation(s)
- Sarah E. Flanagan
- University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom
,* Address for Correspondence: University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom E-mail:
| | - Vũ Chí Dũng
- National Children’s Hospital, Department of Endocrinology, Metabolism and Genetics, Hanoi, Vietnam
| | - Jayne A. L. Houghton
- University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom
| | - Elisa De Franco
- University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom
| | - Can Thi Bich Ngoc
- National Children’s Hospital, Department of Endocrinology, Metabolism and Genetics, Hanoi, Vietnam
| | - Annet Damhuis
- University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom
| | - Frances M. Ashcroft
- University of Oxford, Henry Wellcome Centre for Gene Function, Department of Physiology, Anatomy and Genetics, Oxford, United Kingdom
| | - Lorna W. Harries
- University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom
| | - Sian Ellard
- University of Exeter Medical School, Institute of Biomedical and Clinical Science, Department of Molecular Genetics, Exeter, United Kingdom
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7
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Kubaski F, Yabe H, Suzuki Y, Seto T, Hamazaki T, Mason RW, Xie L, Onsten TGH, Leistner-Segal S, Giugliani R, Dũng VC, Ngoc CTB, Yamaguchi S, Montaño AM, Orii KE, Fukao T, Shintaku H, Orii T, Tomatsu S. Hematopoietic Stem Cell Transplantation for Patients with Mucopolysaccharidosis II. Biol Blood Marrow Transplant 2017; 23:1795-1803. [PMID: 28673849 DOI: 10.1016/j.bbmt.2017.06.020] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 06/26/2017] [Indexed: 10/19/2022]
Abstract
There is limited information regarding the long-term outcomes of hematopoietic stem cell transplantation (HSCT) for mucopolysaccharidosis II (MPS II). In this study, clinical, biochemical, and radiologic findings were assessed in patients who underwent HSCT and/or enzyme replacement therapy (ERT). Demographic data for 146 HSCT patients were collected from 27 new cases and 119 published cases and were compared with 51 ERT and 15 untreated cases. Glycosaminoglycan (GAG) levels were analyzed by liquid chromatography tandem mass spectrometry in blood samples from HSCT, ERT, and untreated patients as well as age-matched controls. Long-term magnetic resonance imaging (MRI) findings were investigated in 13 treated patients (6 ERT and 7 HSCT). Mean age at HSCT was 5.5 years (range, 2 to 21.4 years) in new patients and 5.5 years (range, 10 months to 19.8 years) in published cases. None of the 27 new patients died as a direct result of the HSCT procedure. Graft-versus-host disease occurred in 8 (9%) out of 85 published cases, and 9 (8%) patients died from transplantation-associated complications. Most HSCT patients showed greater improvement in somatic features, joint movements, and activity of daily living than the ERT patients. GAG levels in blood were significantly reduced by ERT and levels were even lower after HSCT. HSCT patients showed either improvement or no progression of abnormal findings in brain MRI while abnormal findings became more extensive after ERT. HSCT seems to be more effective than ERT for MPS II in a wide range of disease manifestations and could be considered as a treatment option for this condition.
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Affiliation(s)
- Francyne Kubaski
- Department of Research, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware; Department of Biological Sciences, University of Delaware, Newark, Delaware; Instituto Nacional de Ciência e Tecnologia de Genética Médica Populacional, Porto Alegre, Brazil
| | - Hiromasa Yabe
- Department of Cell Transplantation and Regenerative Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Yasuyuki Suzuki
- Medical Education Development Center, Gifu University, Gifu, Japan
| | - Toshiyuki Seto
- Department of Pediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Takashi Hamazaki
- Department of Pediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Robert W Mason
- Department of Research, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware; Department of Biological Sciences, University of Delaware, Newark, Delaware
| | - Li Xie
- Department of Research, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware
| | - Tor Gunnar Hugo Onsten
- Haemotherapy Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Department of Internal Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Sandra Leistner-Segal
- Instituto Nacional de Ciência e Tecnologia de Genética Médica Populacional, Porto Alegre, Brazil; Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Postgraduate Program in Medicine, Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Roberto Giugliani
- Instituto Nacional de Ciência e Tecnologia de Genética Médica Populacional, Porto Alegre, Brazil; Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Postgraduate Program in Medicine, Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Department of Genetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Vũ Chí Dũng
- Vietnam National Children's Hospital, Department of Medical Genetics, Metabolism and Endocrinology, Hanoi, Vietnam
| | - Can Thi Bich Ngoc
- Vietnam National Children's Hospital, Department of Medical Genetics, Metabolism and Endocrinology, Hanoi, Vietnam
| | - Seiji Yamaguchi
- Department of Pediatrics, Shimane University, Shimane, Japan
| | - Adriana M Montaño
- Department of Pediatrics, Saint Louis University, St. Louis, Missouri; Department of Biochemistry and Molecular Biology, Saint Louis University, St. Louis, Missouri
| | - Kenji E Orii
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Toshiyuki Fukao
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Haruo Shintaku
- Department of Pediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Tadao Orii
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Shunji Tomatsu
- Department of Research, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware; Department of Pediatrics, Shimane University, Shimane, Japan; Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan; Department of Pediatrics, Thomas Jefferson University, Philadelphia, Pennsylvania.
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8
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Kubaski F, Suzuki Y, Orii K, Giugliani R, Church HJ, Mason RW, Dũng VC, Ngoc CTB, Yamaguchi S, Kobayashi H, Girisha KM, Fukao T, Orii T, Tomatsu S. Glycosaminoglycan levels in dried blood spots of patients with mucopolysaccharidoses and mucolipidoses. Mol Genet Metab 2017; 120:247-254. [PMID: 28065440 PMCID: PMC5346460 DOI: 10.1016/j.ymgme.2016.12.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/20/2016] [Accepted: 12/20/2016] [Indexed: 11/20/2022]
Abstract
UNLABELLED Mucopolysaccharidoses (MPSs) and mucolipidoses (ML) are groups of lysosomal storage disorders in which lysosomal hydrolases are deficient leading to accumulation of undegraded glycosaminoglycans (GAGs), throughout the body, subsequently resulting in progressive damage to multiple tissues and organs. Assays using tandem mass spectrometry (MS/MS) have been established to measure GAGs in serum or plasma from MPS and ML patients, but few studies were performed to determine whether these assays are sufficiently robust to measure GAG levels in dried blood spots (DBS) of patients with MPS and ML. MATERIAL AND METHODS In this study, we evaluated GAG levels in DBS samples from 124 MPS and ML patients (MPS I=16; MPS II=21; MPS III=40; MPS IV=32; MPS VI=10; MPS VII=1; ML=4), and compared them with 115 age-matched controls. Disaccharides were produced from polymer GAGs by digestion with chondroitinase B, heparitinase, and keratanase II. Subsequently, dermatan sulfate (DS), heparan sulfate (HS-0S, HS-NS), and keratan sulfate (mono-sulfated KS, di-sulfated KS, and ratio of di-sulfated KS in total KS) were measured by MS/MS. RESULTS Untreated patients with MPS I, II, VI, and ML had higher levels of DS compared to control samples. Untreated patients with MPS I, II, III, VI, and ML had higher levels of HS-0S; and untreated patients with MPS II, III and VI and ML had higher levels of HS-NS. Levels of KS were age dependent, so although levels of both mono-sulfated KS and di-sulfated KS were generally higher in patients, particularly for MPS II and MPS IV, age group numbers were not sufficient to determine significance of such changes. However, the ratio of di-sulfated KS in total KS was significantly higher in all MPS patients younger than 5years old, compared to age-matched controls. MPS I and VI patients treated with HSCT had normal levels of DS, and MPS I, VI, and VII treated with ERT or HSCT had normal levels of HS-0S and HS-NS, indicating that both treatments are effective in decreasing blood GAG levels. CONCLUSION Measurement of GAG levels in DBS is useful for diagnosis and potentially for monitoring the therapeutic efficacy in MPS.
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Affiliation(s)
- Francyne Kubaski
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States; Department of Biological Sciences, University of Delaware, Newark, DE, United States; INAGEMP, Porto Alegre, Brazil
| | - Yasuyuki Suzuki
- Medical Education Development Center, Gifu University, Japan
| | - Kenji Orii
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Roberto Giugliani
- INAGEMP, Porto Alegre, Brazil; Medical Genetics Service, HCPA, Porto Alegre, Brazil; Department of Genetics, UFRGS, Porto Alegre, Brazil
| | - Heather J Church
- Willink Biochemical Genetics Unit, Genomic Diagnostics Laboratory, Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust St Mary's Hospital, Manchester, UK
| | - Robert W Mason
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States; Department of Biological Sciences, University of Delaware, Newark, DE, United States
| | - Vũ Chí Dũng
- Vietnam National Children's Hospital, Department of Medical Genetics, Metabolism & Endocrinology, Hanoi, Vietnam
| | - Can Thi Bich Ngoc
- Vietnam National Children's Hospital, Department of Medical Genetics, Metabolism & Endocrinology, Hanoi, Vietnam
| | - Seiji Yamaguchi
- Department of Pediatrics, Shimane University, Shimane, Japan
| | | | - Katta M Girisha
- Department of Medical Genetics, Kasturba Medical College Manipal, Manipal University, India
| | - Toshiyuki Fukao
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Tadao Orii
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Shunji Tomatsu
- Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, United States; Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan.
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Mai DT, Dung VC, Thao BP, Khanh NN, Ngoc CTB, Dat NP. Multiple endocrine glands insufficiency due to langerhans cell histiocytosis (LCH): a case report. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428786 DOI: 10.1186/1687-9856-2015-s1-p119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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10
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Ngoc CTB, Dung VC, Thao BP, Khanh NN, Son TN, Thach HN, Hoan NT. Mixed embryonal carcinoma – teratoma cause early puberty: a case report. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428520 DOI: 10.1186/1687-9856-2015-s1-p93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Mai DT, Dung VC, Thao BP, Khanh NN, Ngoc CTB, Dat NP. Congenital adrenal hyperplasia with cholestatic jaundice: a case report. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428815 DOI: 10.1186/1687-9856-2015-s1-p55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Dung VC, Thao BP, Ngoc CTB, Khanh NN, Dat NP, Hoan NT, Mai DT, Craig M. Updated registry of congenital adrenal hyperplasia at the north pediatric referral centre of Vietnam. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428511 DOI: 10.1186/1687-9856-2015-s1-p49] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Khanh NN, Dung VC, Thao BP, Ngoc CTB, Hoan NT, Dat NP. Primary hyperlipidemia in children: clinical, biochemistry characteristics and outcome. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428959 DOI: 10.1186/1687-9856-2015-s1-p124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Dung VC, Mai NP, Hoang NH, Thao BP, Khanh NN, Ngoc CTB, Dat NP. Phenotype of patients with congenital adrenal hyperplasia due to 11β-hydroxylase deficiency. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428642 DOI: 10.1186/1687-9856-2015-s1-p52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Duong DA, Dung VC, Dat NP, Thao BP, Ngoc CTB, Khanh NN, Dien TM, Liem NT, Flanagan S, Ellard S. Molecular genetics, correlation between genotype and phenotype of 65 Vietnames patients with congenital hyperinsulinism. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428897 DOI: 10.1186/1687-9856-2015-s1-p125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Dung VC, Thao BP, Khanh NN, Ngoc CTB, Dat NP, Hoan NT, Morel Y. Phenotype & genotype of congenital adrenal hyperplasia due to mutation in the type ii 3β-hydroxysteroid dehydrogenase gene: a report of two Vietnamese families. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428818 DOI: 10.1186/1687-9856-2015-s1-p50] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Mai DT, Dung VC, Thao BP, Khanh NN, Ngoc CTB, Dat NP. Hypopituitarism due to central nervous system germinoma: a case report. Int J Pediatr Endocrinol 2015. [PMCID: PMC4429033 DOI: 10.1186/1687-9856-2015-s1-p118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Dung VC, Thao BP, Ngoc CTB, Khanh NN, Dat NP, Ellard S, Craig M. Novel mutation in the hepatocyte nuclear factor 1B/maturity – onset diabetes of the young type 5 gene – unreported Vietnamese case. Int J Pediatr Endocrinol 2015. [PMCID: PMC4429118 DOI: 10.1186/1687-9856-2015-s1-p25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Hieu NTN, PhuongThao B, Dung VC, Khanh NN, Ngoc CTB, Hoan NT, Dat NP, Duong TN. Eye and renal complication in pediatric patients with diabetes mellitus type 1. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428874 DOI: 10.1186/1687-9856-2015-s1-p23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Ngoc CTB, Dung VC, Thao BP, Khanh NN, Dat NP, Craig M, Ellard S, Hoan NT. Phenotype, genotype of neonatal diabetes mellitus due to insulin gene mutation. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428741 DOI: 10.1186/1687-9856-2015-s1-p12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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21
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Ha LT, Dung VC, Ngoc CTB, Thao BP, Khanh NN, Chau LH. Hearing loss in osteogenesis imperfecta patients. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428919 DOI: 10.1186/1687-9856-2015-s1-p68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Dung VC, Thao BP, Khanh NN, Ngoc CTB, Fukami M. Phenotype and genotype of patients with disorder of sex development due to 5α-reductase deficiency. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428181 DOI: 10.1186/1687-9856-2015-s1-p112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Thao BP, Dung VC, Khanh NN, Ngoc CTB, Duong DA, Son TN, Thach HN. A case report of neonatal adrenocortical carcinoma. Int J Pediatr Endocrinol 2015. [PMCID: PMC4428814 DOI: 10.1186/1687-9856-2015-s1-p42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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24
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25
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Ngoc CTB, Dung VC, Thao BP, Khanh NN, Son TN, Liem NT, Dat NP, Hoan NT. Adrenal cortex tumors: clinical features and laboratory finding. Int J Pediatr Endocrinol 2013. [PMCID: PMC3856622 DOI: 10.1186/1687-9856-2013-s1-p110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Dung VC, Shimozawa N, Khanh NN, Thao BP, Ngoc CTB, Dat NP, Hoan NT. Mutations of ABCD1 gene and phenotype of Vietnamese patients with X-linked adrenoleukodystrophy (X-ALD). Int J Pediatr Endocrinol 2013. [PMCID: PMC3850246 DOI: 10.1186/1687-9856-2013-s1-p127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Dat NP, Tra VL, Dung VC, Thao BP, Ngoc CTB, Khanh NN, Hoan NT. Factors affecting on the mental development in children with Congenital Hypothyroidism. Int J Pediatr Endocrinol 2013. [PMCID: PMC3856497 DOI: 10.1186/1687-9856-2013-s1-p147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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28
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Thao BP, Dung VC, Khanh NN, Ngoc CTB, Ngoc ND, Nhung DTH, Lan AT, Mai NT, Dat NP, Hoan NT. Clinical and laboratory characteristics of Prader-Willi syndrome. Int J Pediatr Endocrinol 2013. [PMCID: PMC3850395 DOI: 10.1186/1687-9856-2013-s1-p60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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29
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Huong NTT, Dat NP, Hoan NT, Thao BP, Khanh NN, Ngoc CTB, Dung VC. Study relationship between the value of 17-OHP and the value of testosterone in monitoring for congenital adrenal hyperplasia. Int J Pediatr Endocrinol 2013. [PMCID: PMC3850175 DOI: 10.1186/1687-9856-2013-s1-p124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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30
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Dung VC, Fukami M, Ngoc CTB, Thao BP, Khanh NN, Hoan NT, Liem NT, Ngoc ND, Mai NTP, Nga PT, Dat NP, Ogata T. Genotype and phenotype of Vietnamese patients with androgen insensitivity syndrome. Int J Pediatr Endocrinol 2013. [PMCID: PMC3850449 DOI: 10.1186/1687-9856-2013-s1-p194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vu Chi Dung
- Vietnam National Hospital of Pediatrics, Hanoi, Vietnam
| | - Maki Fukami
- National Research Institute for Child Health and Development, Tokyo, Japan
| | | | | | | | | | | | - Ngo Diem Ngoc
- Vietnam National Hospital of Pediatrics, Hanoi, Vietnam
| | | | - Pham Thu Nga
- Vietnam National Hospital of Pediatrics, Hanoi, Vietnam
| | | | - Tsutomu Ogata
- National Research Institute for Child Health and Development, Tokyo, Japan
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Dung VC, Liem NT, Thao BP, Khanh NN, Ngoc CTB, Hoan NT, Dung KTK, Nhu LT, Duong DA, Dat NP, Flanagan S, Ellard S. Molecular genetics and phenotype of 26 Vietnamese patients with congenital hyperinsulinism. Int J Pediatr Endocrinol 2013. [PMCID: PMC3850086 DOI: 10.1186/1687-9856-2013-s1-p179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vu Chi Dung
- Vietnam National Hospital of Pediatrics, Hanoi, Vietnam
| | | | | | | | | | | | | | - Le To Nhu
- Vietnam National Hospital of Pediatrics, Hanoi, Vietnam
| | | | | | - Sarah Flanagan
- Peninsula Medical School, Institute of Biomedical and Clinical Science, Exeter, UK
| | - Sian Ellard
- Peninsula Medical School, Institute of Biomedical and Clinical Science, Exeter, UK
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