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Nitte CM, Dobelke F, König J, Konrad M, Becker K, Kamp-Becker I, Weber S. Review of neurodevelopmental disorders in patients with HNF1B gene variations. Front Pediatr 2023; 11:1149875. [PMID: 36969268 PMCID: PMC10034397 DOI: 10.3389/fped.2023.1149875] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 02/20/2023] [Indexed: 03/25/2023] Open
Abstract
This review investigates the association between neurodevelopmental disorders (NDD) and variations of the gene HNF1B. Heterozygous intragenetic mutations or heterozygous gene deletions (17q12 microdeletion syndrome) of HNF1B are the cause of a multi-system developmental disorder, termed renal cysts and diabetes syndrome (RCAD). Several studies suggest that in general, patients with genetic variation of HNF1B have an elevated risk for additional neurodevelopmental disorders, especially autism spectrum disorder (ASD) but a comprehensive assessment is yet missing. This review provides an overview including all available studies of patients with HNF1B mutation or deletion with comorbid NDD with respect to the prevalence of NDDs and in how they differ between patients with an intragenic mutation or 17q12 microdeletion. A total of 31 studies was identified, comprising 695 patients with variations in HNF1B, (17q12 microdeletion N = 416, mutation N = 279). Main results include that NDDs are present in both groups (17q12 microdeletion 25.2% vs. mutation 6.8%, respectively) but that patients with 17q12 microdeletions presented more frequently with any NDDs and especially with learning difficulties compared to patients with a mutation of HNF1B. The observed prevalence of NDDs in patients with HNF1B variations seems to be higher than in the general population, but the validity of the estimated prevalence must be deemed insufficient. This review shows that systematical research of NDDs in patients with HNF1B mutations or deletions is lacking. Further studies regarding neuropsychological characteristics of both groups are needed. NDDs might be a concomitant of HFN1B-related disease and should be considered in clinical routine and scientific reports.
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Affiliation(s)
- Clara Marie Nitte
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Philipps University, Marburg, Germany
- Correspondence: Clara Nittel
| | - Frederike Dobelke
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Philipps University, Marburg, Germany
| | - Jens König
- Department of General Pediatrics, University Children’s Hospital, Münster, Germany
| | - Martin Konrad
- Department of General Pediatrics, University Children’s Hospital, Münster, Germany
| | - Katja Becker
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Philipps University, Marburg, Germany
| | - Inge Kamp-Becker
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Philipps University, Marburg, Germany
| | - Stefanie Weber
- Department of Pediatric and Adolescent Medicine, Philipps University, Marburg, Germany
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2
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Jones GE, Mousa HA, Rowley H, Houtman P, Vasudevan PC. Should we offer prenatal testing for 17q12 microdeletion syndrome to all cases with prenatally diagnosed echogenic kidneys? Prenatal findings in two families with 17q12 microdeletion syndrome and review of the literature. Prenat Diagn 2015; 35:1336-41. [DOI: 10.1002/pd.4701] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/10/2015] [Accepted: 09/27/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Gabriela E. Jones
- Clinical Genetics Department; University Hospitals Leicester NHS Trust; Leicester UK
| | - Hatem A. Mousa
- Department of Fetal and Maternal Medicine; University Hospitals Leicester NHS Trust; Leicester UK
| | - Helen Rowley
- Leicester Medical School; University of Leicester; Leicester UK
| | - Peter Houtman
- Department of Paediatric Nephrology; University Hospitals Leicester NHS Trust; Leicester UK
| | - Pradeep C. Vasudevan
- Clinical Genetics Department; University Hospitals Leicester NHS Trust; Leicester UK
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3
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Laffargue F, Bourthoumieu S, Llanas B, Baudouin V, Lahoche A, Morin D, Bessenay L, De Parscau L, Cloarec S, Delrue MA, Taupiac E, Dizier E, Laroche C, Bahans C, Yardin C, Lacombe D, Guigonis V. Towards a new point of view on the phenotype of patients with a 17q12 microdeletion syndrome. Arch Dis Child 2015; 100:259-64. [PMID: 25324567 DOI: 10.1136/archdischild-2014-306810] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE 17q12 microdeletion syndrome involves 15 genes, including HNF1B, and is considered to confer a high risk of neuropsychiatric disorders. Patients with HNF1B gene deletion diagnosed secondary to renal disorders are only very rarely reported to have neuropsychiatric disorders. Interestingly, however, when tested, patients with HNF1B gene deletion are found to have 17q12 deletion. This brings into question the extent to which 17q12 deletion is genuinely associated with severe neuropsychological disorders and in which patients. In this study, we sought to confirm 17q12 microdeletion in kidney patients initially diagnosed with HNF1B gene deletion and evaluate neuropsychological disorders in these patients compared with those with HNF1B point mutation. PATIENTS AND DESIGN Thirty-nine children with HNF1B disorders (26 with deletions) diagnosed secondary to renal abnormalities were included in this prospective study and tested for 17q12 microdeletion and neuropsychological disorders. RESULTS The same 17q12 microdeletion found in patients with neuropsychological disorders was identified in all of our patients with HNF1B deletion. Neurological examinations found no severe impairments except for one patient with autism. No significant differences were found between patients with deletions and those with point mutations as concerns learning abilities and schooling. Nevertheless, patients with deletions tended to have lower developmental quotients and more difficulties at school. CONCLUSIONS Complete deletion of the HNF1B gene and 17q12 microdeletion syndrome are actually the same genetic disorder. The neuropsychological phenotype of patients appears less severe when 17q12 deletion is diagnosed secondary to kidney rather than neuropsychological abnormalities. These data may influence antenatal counselling.
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Affiliation(s)
- Fanny Laffargue
- Department of Paediatrics, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
| | - Sylvie Bourthoumieu
- Department of Cytogenetic, CHREC, Limoges University Hospital, Limoges, France
| | - Brigitte Llanas
- Department of Paediatric Nephrology, Bordeaux University Hospital, Bordeaux, France
| | - Véronique Baudouin
- Department of Paediatric Nephrology, Hospital R. Debré, APHP, Paris, France
| | - Annie Lahoche
- Department of Paediatric Nephrology, Lille University Hospital, Lille, France
| | - Denis Morin
- Department of Paediatric Nephrology, Montpellier University Hospital, Montpellier, France
| | - Lucie Bessenay
- Department of Paediatric Nephrology, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
| | - Loïc De Parscau
- Department of Paediatric Nephrology, Brest University Hospital, Brest, France
| | - Sylvie Cloarec
- Department of Paediatric Nephrology, Tours University Hospital, Tours, France
| | - Marie-Ange Delrue
- Department of Medical Genetics, CHU Bordeaux, Rare Diseases Laboratory: Genetics and Metabolism (MRGM), University of Bordeaux, Bordeaux, France
| | - Emmanuelle Taupiac
- Department of Paediatric Nephrology, Bordeaux University Hospital, Bordeaux, France
| | - Emilie Dizier
- Department of Paediatrics, CHREC, Limoges University Hospital, Limoges, France
| | - Cécile Laroche
- Department of Paediatrics, CHREC, Limoges University Hospital, Limoges, France
| | - Claire Bahans
- Department of Paediatrics, CHREC, Limoges University Hospital, Limoges, France
| | - Catherine Yardin
- Department of Cytogenetic, CHREC, Limoges University Hospital, Limoges, France
| | - Didier Lacombe
- Department of Medical Genetics, CHU Bordeaux, Rare Diseases Laboratory: Genetics and Metabolism (MRGM), University of Bordeaux, Bordeaux, France
| | - Vincent Guigonis
- Department of Paediatrics, CHREC, Limoges University Hospital, Limoges, France CNRS UMR 7276, Limoges University, Limoges, France
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4
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Kotalova R, Dusatkova P, Cinek O, Dusatkova L, Dedic T, Seeman T, Lebl J, Pruhova S. Hepatic phenotypes of HNF1B gene mutations: A case of neonatal cholestasis requiring portoenterostomy and literature review. World J Gastroenterol 2015; 21:2550-2557. [PMID: 25741167 PMCID: PMC4342936 DOI: 10.3748/wjg.v21.i8.2550] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 08/28/2014] [Accepted: 12/01/2014] [Indexed: 02/06/2023] Open
Abstract
Hepatocyte nuclear factor 1-β (HNF1B) defects cause renal cysts and diabetes syndrome (RCAD), or HNF1B-maturity-onset diabetes of the young. However, the hepatic phenotype of HNF1B variants is not well studied. We present a female neonate born small for her gestational age [birth weight 2360 g; -2.02 standard deviations (SD) and birth length 45 cm; -2.40 SD at the 38th gestational week]. She developed neonatal cholestasis due to biliary atresia and required surgical intervention (portoenterostomy) when 32-d old. Following the operation, icterus resolved, but laboratory signs of liver dysfunction persisted. She had hyperechogenic kidneys prenatally with bilateral renal cysts and pancreatic hypoplasia postnatally that led to the diagnosis of an HNF1B deletion. This represents the most severe hepatic phenotype of an HNF1B variant recognized thus far. A review of 12 published cases with hepatic phenotypes of HNF1B defects allowed us to distinguish three severity levels, ranging from neonatal cholestasis through adult-onset cholestasis to non-cholestatic liver impairment, all of these are associated with congenital renal cysts and mostly with diabetes later in life. We conclude that to detect HNF1B variants, neonates with cholestasis should be checked for the presence of renal cysts, with special focus on those who are born small for their gestational age. Additionally, patients with diabetes and renal cysts at any age who develop cholestasis and/or exocrine pancreatic insufficiency should be tested for HNF1B variants as the true etiological factor of all disease components. Further observations are needed to confirm the potential reversibility of cholestasis in infancy in HNF1B mutation/deletion carriers.
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MESH Headings
- Biliary Atresia/complications
- Biliary Atresia/diagnosis
- Biliary Atresia/genetics
- Birth Weight
- Central Nervous System Diseases/complications
- Central Nervous System Diseases/diagnosis
- Central Nervous System Diseases/genetics
- Cholangiopancreatography, Magnetic Resonance
- Cholestasis/diagnosis
- Cholestasis/genetics
- Cholestasis/surgery
- DNA Mutational Analysis
- Dental Enamel/abnormalities
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/diagnosis
- Diabetes Mellitus, Type 2/genetics
- Female
- Genetic Predisposition to Disease
- Hepatocyte Nuclear Factor 1-beta/genetics
- Humans
- Infant
- Infant, Newborn
- Infant, Small for Gestational Age
- Kidney Diseases, Cystic/complications
- Kidney Diseases, Cystic/diagnosis
- Kidney Diseases, Cystic/genetics
- Mutation
- Phenotype
- Portoenterostomy, Hepatic
- Treatment Outcome
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Weber SC, Uhlenberg B, Raile K, Querfeld U, Müller D. Polyoma virus-associated progressive multifocal leukoencephalopathy after renal transplantation: regression following withdrawal of mycophenolate mofetil. Pediatr Transplant 2011; 15:E19-24. [PMID: 20880091 DOI: 10.1111/j.1399-3046.2010.01368.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The 2008-released FDA safety report described a potential association between use of MMF and progressive multifocal leukoencephalopathy. We here report the case of an 11-yr-old kidney transplanted boy suffering from PML who showed rapid improvement parallel to withdrawal of MMF. This case contributes to the increasing knowledge on side effects of MMF treatment in children.
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Affiliation(s)
- Sven C Weber
- Department of Pediatric Nephrology, Charité, Universitätsmedizin, Berlin, Germany.
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6
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Moreno-De-Luca D, Mulle JG, Kaminsky EB, Sanders SJ, Myers SM, Adam MP, Pakula AT, Eisenhauer NJ, Uhas K, Weik L, Guy L, Care ME, Morel CF, Boni C, Salbert BA, Chandrareddy A, Demmer LA, Chow EW, Surti U, Aradhya S, Pickering DL, Golden DM, Sanger WG, Aston E, Brothman AR, Gliem TJ, Thorland EC, Ackley T, Iyer R, Huang S, Barber JC, Crolla JA, Warren ST, Martin CL, Ledbetter DH, Warren ST, Martin CL, Ledbetter DH. Deletion 17q12 is a recurrent copy number variant that confers high risk of autism and schizophrenia. Am J Hum Genet 2010; 87:618-30. [PMID: 21055719 DOI: 10.1016/j.ajhg.2010.10.004] [Citation(s) in RCA: 238] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Revised: 09/23/2010] [Accepted: 10/07/2010] [Indexed: 01/17/2023] Open
Abstract
Autism spectrum disorders (ASD) and schizophrenia are neurodevelopmental disorders for which recent evidence indicates an important etiologic role for rare copy number variants (CNVs) and suggests common genetic mechanisms. We performed cytogenomic array analysis in a discovery sample of patients with neurodevelopmental disorders referred for clinical testing. We detected a recurrent 1.4 Mb deletion at 17q12, which harbors HNF1B, the gene responsible for renal cysts and diabetes syndrome (RCAD), in 18/15,749 patients, including several with ASD, but 0/4,519 controls. We identified additional shared phenotypic features among nine patients available for clinical assessment, including macrocephaly, characteristic facial features, renal anomalies, and neurocognitive impairments. In a large follow-up sample, the same deletion was identified in 2/1,182 ASD/neurocognitive impairment and in 4/6,340 schizophrenia patients, but in 0/47,929 controls (corrected p = 7.37 × 10⁻⁵). These data demonstrate that deletion 17q12 is a recurrent, pathogenic CNV that confers a very high risk for ASD and schizophrenia and show that one or more of the 15 genes in the deleted interval is dosage sensitive and essential for normal brain development and function. In addition, the phenotypic features of patients with this CNV are consistent with a contiguous gene syndrome that extends beyond RCAD, which is caused by HNF1B mutations only.
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Abstract
Intellectual disability (ID) is the leading socio-economic problem of health care, but compared to autism and schizophrenia, it has received very little public attention. Important risk factors for ID are malnutrition, cultural deprivation, poor health care, and parental consanguinity. In the Western world, fetal alcohol exposure is the most common preventable cause. Most severe forms of ID have genetic causes. Cytogenetically detectable and submicroscopic chromosomal rearrangements account for approximately 25% of all cases. X-linked gene defects are responsible in 10-12% of males with ID; to date, 91 of these defects have been identified. In contrast, autosomal gene defects have been largely disregarded, but due to coordinated efforts and the advent of next-generation DNA sequencing, this is about to change. As shown for Fra(X) syndrome, this renewed focus on autosomal gene defects will pave the way for molecular diagnosis and prevention, shed more light on the pathogenesis of ID, and reveal new opportunities for therapy.
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8
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Loirat C, Bellanné-Chantelot C, Husson I, Deschênes G, Guigonis V, Chabane N. Autism in three patients with cystic or hyperechogenic kidneys and chromosome 17q12 deletion. Nephrol Dial Transplant 2010; 25:3430-3. [DOI: 10.1093/ndt/gfq380] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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9
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Nakayama M, Nozu K, Goto Y, Kamei K, Ito S, Sato H, Emi M, Nakanishi K, Tsuchiya S, Iijima K. HNF1B alterations associated with congenital anomalies of the kidney and urinary tract. Pediatr Nephrol 2010; 25:1073-9. [PMID: 20155289 DOI: 10.1007/s00467-010-1454-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Revised: 12/25/2009] [Accepted: 01/05/2010] [Indexed: 11/26/2022]
Abstract
Hepatocyte nuclear factor 1beta (HNF1beta) abnormalities have been recognized to cause congenital anomalies of the kidney and urinary tract (CAKUT), predominantly affecting bilateral renal malformations. To further understand the spectrum of HNF1beta related phenotypes, we performed HNF1B gene mutation and deletion analyses in Japanese patients with renal hypodysplasia (n = 31), unilateral multicystic dysplastic kidney (MCDK; n = 14) and others (n = 5). We identified HNF1B alterations in 5 out of 50 patients (10%). De novo heterozygous complete deletions of HNF1B were found in 3 patients with unilateral MCDK. Two of the patients showed contralateral hypodysplasia, whereas the other patient showed a radiologically normal contralateral kidney with normal renal function. Copy number variation analyses showed 1.4 Mb microdeletions involving the whole HNF1B gene with breakpoints in flanking segmental duplications. We also identified 1 novel truncated mutation (1007insC) and another missense mutation (226G>T) in patients with bilateral hypodysplasia. HNF1B alterations leading to haploinsufficiency affect a diverse spectrum of CAKUT. The existence of a patient with unilateral MCDK with normal renal function might provide genetic insight into the etiology of these substantial populations of only unilateral MCDK. The recurrent microdeletions encompassing HNF1B could have a significant impact on the mechanism of HNF1B deletions.
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Affiliation(s)
- Makiko Nakayama
- Department of Nephrology, National Center for Child Health and Development, Tokyo, Japan
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10
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Hoischen A, Landwehr C, Kabisch S, Ding XQ, Trost D, Stropahl G, Wigger M, Radlwimmer B, Weber RG, Haffner D. Array-CGH in unclear syndromic nephropathies identifies a microdeletion in Xq22.3-q23. Pediatr Nephrol 2009; 24:1673-81. [PMID: 19444485 DOI: 10.1007/s00467-009-1184-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 03/08/2009] [Accepted: 03/13/2009] [Indexed: 12/14/2022]
Abstract
To investigate whether submicroscopic chromosomal deletions or duplications can be causative of unclear syndromic nephropathies, we analyzed ten patients with congenital abnormalities of the kidney and urinary tract or glomerulopathies combined with important extrarenal anomalies by whole-genome array-based comparative genomic hybridization. In a 14-year-old girl presenting with hematuria, proteinuria, mental retardation (MR), sensorineural hearing loss, dysmorphisms, and epilepsy, we detected a microdeletion in chromosome Xq22.3-q23. This deletion was verified and characterized by fluorescence in situ hybridization and multiplex ligation-dependent probe amplification analyses, found to be de novo, uniallelic and 3.3 Mb in size. Electron microscopy of a kidney biopsy showed glomerular basement membrane thinning and segmental splitting of the lamina densa compatible with Alport syndrome. Cranial magnetic resonance and diffusion tensor imaging detected a severe neuronal migration disorder with double cortex formation and pronounced reduction of the fronto-occipital tract system. Thus, in one of ten patients with unclear syndromic nephropathies we identified a previously undescribed contiguous gene syndrome at Xq22.3-q23. The microdeletion contains the X-linked Alport syndrome gene COL4A5, the MR genes FACL4 and PAK3, and parts of the X-chromosomal lissencephaly gene DCX associated with double cortex formation in girls, MR, and epilepsy. The phenotype in our patient combines features of the Alport-MR contiguous gene syndrome with lissencephaly.
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Affiliation(s)
- Alexander Hoischen
- Institute of Human Genetics, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
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11
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Raile K, Klopocki E, Holder M, Wessel T, Galler A, Deiss D, Müller D, Riebel T, Horn D, Maringa M, Weber J, Ullmann R, Grüters A. Expanded clinical spectrum in hepatocyte nuclear factor 1b-maturity-onset diabetes of the young. J Clin Endocrinol Metab 2009; 94:2658-64. [PMID: 19417042 DOI: 10.1210/jc.2008-2189] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AIMS HNF1B-maturity-onset diabetes of the young is caused by abnormalities in the HNF1B gene encoding the transcription factor HNF-1beta. We aimed to investigate detailed clinical features and the type of HNF1B gene anomaly in five pediatric cases with HNF1B-MODY. METHODS From a cohort of 995 children and adolescents with diabetes, we analyzed the most frequent maturity-onset diabetes of the young genes (GCK, HNF1A, HNF4A) including HNF1B sequencing and deletion analysis by quantitative Multiplex-PCR of Short Fluorescent Fragments (QMPSF) if patients were islet autoantibody-negative and had one parent with diabetes or associated extrapancreatic features or detectable C-peptide outside honeymoon phase. Presence and size of disease-causing chromosomal rearrangements detected by QMPSF were further analyzed by array comparative genomic hybridization. RESULTS Overall, five patients had a heterozygous HNF1B deletion, presenting renal disease, elevated liver enzymes, and diabetes. Diabetes was characterized by insulin resistance and adolescent onset of hyperglycemia. Additionally, clinical features in some patients were pancreas dysplasia and exocrine insufficiency (two of five patients), genital defects (three of five), mental retardation (two of five), and eye abnormalities (coloboma, cataract in two of five). One case also had severe growth deficit combined with congenital cholestasis, and another case had common variable immune deficiency. All patients reported here had monoallelic loss of the entire HNF1B gene. Whole genome array comparative genomic hybridization confirmed a precurrent genomic deletion of approximately 1.3-1.7 Mb in size. CONCLUSION The clinical data of our cases enlarge the wide spectrum of patients with HNF1B anomaly. The underlying molecular defect in all cases was a 1.3- to 1.7-Mb deletion, and paired, segmental duplications along with breakpoints were most likely involved in this recurrent chromosomal microdeletion.
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Affiliation(s)
- Klemens Raile
- Department of Pediatric Endocrinology and Diabetes, Charité Campus Virchow, 13353 Berlin, Germany.
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12
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Raile K, Klopocki E, Wessel T, Deiss D, Horn D, Müller D, Ullmann R, Grüters A. HNF1B abnormality (mature-onset diabetes of the young 5) in children and adolescents: high prevalence in autoantibody-negative type 1 diabetes with kidney defects. Diabetes Care 2008; 31:e83. [PMID: 18955710 DOI: 10.2337/dc08-0920] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Klemens Raile
- Institute for Experimental Pediatric Endocrinology and Diabetes, Charité Campus Virchow, Berlin, Germany
| | - Eva Klopocki
- Institute for Medical Genetics, Charité Campus Virchow, Berlin, Germany
| | - Theda Wessel
- Institute for Experimental Pediatric Endocrinology and Diabetes, Charité Campus Virchow, Berlin, Germany
| | - Dorothee Deiss
- Institute for Experimental Pediatric Endocrinology and Diabetes, Charité Campus Virchow, Berlin, Germany
| | - Denise Horn
- Institute for Medical Genetics, Charité Campus Virchow, Berlin, Germany
| | - Dominik Müller
- Department of Pediatric Nephrology, Charité Campus Virchow, Berlin, Germany
| | | | - Annette Grüters
- Institute for Experimental Pediatric Endocrinology and Diabetes, Charité Campus Virchow, Berlin, Germany
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13
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Mefford HC, Clauin S, Sharp AJ, Moller RS, Ullmann R, Kapur R, Pinkel D, Cooper GM, Ventura M, Ropers HH, Tommerup N, Eichler EE, Bellanne-Chantelot C. Recurrent reciprocal genomic rearrangements of 17q12 are associated with renal disease, diabetes, and epilepsy. Am J Hum Genet 2007; 81:1057-69. [PMID: 17924346 DOI: 10.1086/522591] [Citation(s) in RCA: 194] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Accepted: 07/27/2007] [Indexed: 01/20/2023] Open
Abstract
Most studies of genomic disorders have focused on patients with cognitive disability and/or peripheral nervous system defects. In an effort to broaden the phenotypic spectrum of this disease model, we assessed 155 autopsy samples from fetuses with well-defined developmental pathologies in regions predisposed to recurrent rearrangement, by array-based comparative genomic hybridization. We found that 6% of fetal material showed evidence of microdeletion or microduplication, including three independent events that likely resulted from unequal crossing-over between segmental duplications. One of the microdeletions, identified in a fetus with multicystic dysplastic kidneys, encompasses the TCF2 gene on 17q12, previously shown to be mutated in maturity-onset diabetes, as well as in a subset of pediatric renal abnormalities. Fine-scale mapping of the breakpoints in different patient cohorts revealed a recurrent 1.5-Mb de novo deletion in individuals with phenotypes that ranged from congenital renal abnormalities to maturity-onset diabetes of the young type 5. We also identified the reciprocal duplication, which appears to be enriched in samples from patients with epilepsy. We describe the first example of a recurrent genomic disorder associated with diabetes.
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Affiliation(s)
- Heather C Mefford
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
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