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Luo M, Gu X, Zhou T, Chen C. Prenatal diagnosis and molecular cytogenetic analyses of a paternal inherited deletion of 1q23.3 encompassing PBX1 gene. Mol Cytogenet 2022; 15:53. [PMID: 36544198 PMCID: PMC9768991 DOI: 10.1186/s13039-022-00632-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Patients with deletions involving the long arm of chromosome 1 are rare. The PBX1 gene is located on chromosome 1q23.3. PBX1 encodes a transcription factor which promotes protein-protein interaction and plays a crucial role in several developmental processes. PBX1 haploinsufficiency had been reported to lead syndromic congenital anomalies of kidney and urinary tract (CAKUT) in humans. CASE PRESENTATION In this research, a 24-year-old woman (gravida 1, para 0) underwent amniocentesis at 22 weeks' gestation because of a horseshoe kidney of the fetus on prenatal ultrasound. RESULTS Chromosomal microarray analysis (CMA) from this family revealed a 1.14 Mb paternal inherited deletion on chromosome 1q23.3, spanning from position 163,620,000 to 164,760,000 (hg19). Trio whole-exome sequencing (WES) showed heterozygous deletions in exons 1-2 of the PBX1 in fetal and paternal samples. At the 3-year follow-up, the baby did not have an abnormal phenotype except a horseshoe kidney. CONCLUSION We provide a detailed description of the phenotype in a family with paternal inherited deletion of 1q23.3 encompassing exons 1-2 of the PBX1 gene. Combination of karyotype analysis, CMA, WES, prenatal ultrasound and genetic counseling is helpful for the prenatal diagnosis of chromosomal microdeletions/microduplications.
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Affiliation(s)
- Man Luo
- Department of Obstetrics, Maternal and Child Health Hospital of Hubei Province, Wuhan, Hubei, People's Republic of China
| | - Xia Gu
- Department of Obstetrics, Maternal and Child Health Hospital of Hubei Province, Wuhan, Hubei, People's Republic of China
| | - Ting Zhou
- Medical Genetics Center, Maternal and Child Health Hospital of Hubei Province, Wuhan, Hubei, People's Republic of China
| | - Chaoli Chen
- Department of Obstetrics, Maternal and Child Health Hospital of Hubei Province, Wuhan, Hubei, People's Republic of China.
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Narrowing down the region responsible for 1q23.3q24.1 microdeletion by identifying the smallest deletion. Hum Genome Var 2019; 6:47. [PMID: 31645985 PMCID: PMC6804575 DOI: 10.1038/s41439-019-0079-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 09/16/2019] [Accepted: 09/16/2019] [Indexed: 11/24/2022] Open
Abstract
Interstitial deletions of 1q23.3q24.1 are rare. Here, chromosomal microarray testing identified a de novo microdeletion of arr[GRCh37]1q23.3q24.1(164816055_165696996) × 1 in a patient with moderate developmental delay, hearing loss, cryptorchidism, and other distinctive features. The clinical features were common to those previously reported in patients with overlapping deletions. The patient’s deletion size was 881 kb—the smallest yet reported. This therefore narrowed down the deletion responsible for the common clinical features. The deleted region included seven genes; deletion of LMX1A, RXRG, and ALDH9A1 may have caused our patient’s neurodevelopmental delay.
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3
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Sun M, Lou J, Li Q, Chen J, Li Y, Li D, Yuan H, Liu Y. Prenatal findings and molecular cytogenetic analyses of a de novo interstitial deletion of 1q23.3 encompassing PBX1 gene. Taiwan J Obstet Gynecol 2019; 58:292-295. [PMID: 30910156 DOI: 10.1016/j.tjog.2019.01.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2018] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVES To present the prenatal findings and the molecular cytogenetic analyses of a de novo interstitial deletion of 1q23.3 encompassing PBX1 gene. CASE REPORT A 32-year-old woman (gravida 1, para 0) underwent amniocentesis at 26 weeks' gestation because of constant small fetal kidneys on prenatal ultrasound. Chromosome microarray analysis (CMA) detected a de novo deletion of 1.871 Mb at 1q23.3. The deletion encompassed 2 genes of PBX1 and LMX1A. PBX1 haploinsufficiency had been reported to lead syndromic congenital anomalies of kidney and urinary tract (CAKUT) in humans. Furthermore, at 31 weeks' gestation, borderline oligohydramnios and restricted fetal dimensions were revealed. Ultimately, the pregnancy was terminated at 32 weeks with a 1500-g female fetus presenting polydactyl of left hand. CONCLUSIONS The shared phenotypes between this case and the previously published prenatal cases demonstrate that loss of function mutation in PBX1 should be suspicious in fetus with bilateral renal hypoplasia, oligohydramnios and intrauterine growth retardation (IUGR).
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Affiliation(s)
- Manna Sun
- Prenatal Diagnostic Center, Dongguan Maternal and Children Health Hospital, Dongguan, Guangdong, People's Republic of China
| | - Jiwu Lou
- Prenatal Diagnostic Center, Dongguan Maternal and Children Health Hospital, Dongguan, Guangdong, People's Republic of China
| | - Qiaoyi Li
- Prenatal Diagnostic Center, Dongguan Maternal and Children Health Hospital, Dongguan, Guangdong, People's Republic of China
| | - Jianhong Chen
- Prenatal Diagnostic Center, Huizhou Women & Children Hospital, Huizhou, Guangdong, People's Republic of China
| | - Yujuan Li
- Prenatal Diagnostic Center, Dongguan Maternal and Children Health Hospital, Dongguan, Guangdong, People's Republic of China
| | - Dongzhi Li
- Prenatal Diagnostic Center, Guangzhou Women & Children Medical Center Affiliated to Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Haiming Yuan
- Prenatal Diagnostic Center, Dongguan Maternal and Children Health Hospital, Dongguan, Guangdong, People's Republic of China
| | - Yanhui Liu
- Prenatal Diagnostic Center, Dongguan Maternal and Children Health Hospital, Dongguan, Guangdong, People's Republic of China.
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Wesdorp M, de Koning Gans PAM, Schraders M, Oostrik J, Huynen MA, Venselaar H, Beynon AJ, van Gaalen J, Piai V, Voermans N, van Rossum MM, Hartel BP, Lelieveld SH, Wiel L, Verbist B, Rotteveel LJ, van Dooren MF, Lichtner P, Kunst HPM, Feenstra I, Admiraal RJC, Yntema HG, Hoefsloot LH, Pennings RJE, Kremer H. Heterozygous missense variants of LMX1A lead to nonsyndromic hearing impairment and vestibular dysfunction. Hum Genet 2018; 137:389-400. [PMID: 29754270 PMCID: PMC5973959 DOI: 10.1007/s00439-018-1880-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 03/31/2018] [Indexed: 12/20/2022]
Abstract
Unraveling the causes and pathomechanisms of progressive disorders is essential for the development of therapeutic strategies. Here, we identified heterozygous pathogenic missense variants of LMX1A in two families of Dutch origin with progressive nonsyndromic hearing impairment (HI), using whole exome sequencing. One variant, c.721G > C (p.Val241Leu), occurred de novo and is predicted to affect the homeodomain of LMX1A, which is essential for DNA binding. The second variant, c.290G > C (p.Cys97Ser), predicted to affect a zinc-binding residue of the second LIM domain that is involved in protein–protein interactions. Bi-allelic deleterious variants of Lmx1a are associated with a complex phenotype in mice, including deafness and vestibular defects, due to arrest of inner ear development. Although Lmx1a mouse mutants demonstrate neurological, skeletal, pigmentation and reproductive system abnormalities, no syndromic features were present in the participating subjects of either family. LMX1A has previously been suggested as a candidate gene for intellectual disability, but our data do not support this, as affected subjects displayed normal cognition. Large variability was observed in the age of onset (a)symmetry, severity and progression rate of HI. About half of the affected individuals displayed vestibular dysfunction and experienced symptoms thereof. The late-onset progressive phenotype and the absence of cochleovestibular malformations on computed tomography scans indicate that heterozygous defects of LMX1A do not result in severe developmental abnormalities in humans. We propose that a single LMX1A wild-type copy is sufficient for normal development but insufficient for maintenance of cochleovestibular function. Alternatively, minor cochleovestibular developmental abnormalities could eventually lead to the progressive phenotype seen in the families.
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Affiliation(s)
- Mieke Wesdorp
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- The Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Pia A M de Koning Gans
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Margit Schraders
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jaap Oostrik
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Martijn A Huynen
- Centre for Molecular and Biomolecular Informatics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Hanka Venselaar
- Centre for Molecular and Biomolecular Informatics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Andy J Beynon
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Judith van Gaalen
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vitória Piai
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Medical Psychology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nicol Voermans
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Michelle M van Rossum
- Department of Dermatology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bas P Hartel
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Stefan H Lelieveld
- The Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Laurens Wiel
- The Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Berit Verbist
- Department of Radiology, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Marieke F van Dooren
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Peter Lichtner
- Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Henricus P M Kunst
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Ilse Feenstra
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ronald J C Admiraal
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Helger G Yntema
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lies H Hoefsloot
- Department of Clinical Genetics, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Ronald J E Pennings
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Hannie Kremer
- Department of Otorhinolaryngology, Hearing and Genes, Radboud University Medical Center, Internal Postal Code 377, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands.
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands.
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5
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Heidet L, Morinière V, Henry C, De Tomasi L, Reilly ML, Humbert C, Alibeu O, Fourrage C, Bole-Feysot C, Nitschké P, Tores F, Bras M, Jeanpierre M, Pietrement C, Gaillard D, Gonzales M, Novo R, Schaefer E, Roume J, Martinovic J, Malan V, Salomon R, Saunier S, Antignac C, Jeanpierre C. Targeted Exome Sequencing Identifies PBX1 as Involved in Monogenic Congenital Anomalies of the Kidney and Urinary Tract. J Am Soc Nephrol 2017; 28:2901-2914. [PMID: 28566479 PMCID: PMC5619971 DOI: 10.1681/asn.2017010043] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 04/20/2017] [Indexed: 01/01/2023] Open
Abstract
Congenital anomalies of the kidney and urinary tract (CAKUT) occur in three to six of 1000 live births, represent about 20% of the prenatally detected anomalies, and constitute the main cause of CKD in children. These disorders are phenotypically and genetically heterogeneous. Monogenic causes of CAKUT in humans and mice have been identified. However, despite high-throughput sequencing studies, the cause of the disease remains unknown in most patients, and several studies support more complex inheritance and the role of environmental factors and/or epigenetics in the pathophysiology of CAKUT. Here, we report the targeted exome sequencing of 330 genes, including genes known to be involved in CAKUT and candidate genes, in a cohort of 204 unrelated patients with CAKUT; 45% of the patients were severe fetal cases. We identified pathogenic mutations in 36 of 204 (17.6%) patients. These mutations included five de novo heterozygous loss of function mutations/deletions in the PBX homeobox 1 gene (PBX1), a gene known to have a crucial role in kidney development. In contrast, the frequency of SOX17 and DSTYK variants recently reported as pathogenic in CAKUT did not indicate causality. These findings suggest that PBX1 is involved in monogenic CAKUT in humans and call into question the role of some gene variants recently reported as pathogenic in CAKUT. Targeted exome sequencing also proved to be an efficient and cost-effective strategy to identify pathogenic mutations and deletions in known CAKUT genes.
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Affiliation(s)
- Laurence Heidet
- Assistance Publique - Hôpitaux de Paris, Centre de référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte, Paris, France
- Assistance Publique - Hôpitaux de Paris, Service de Néphrologie Pédiatrique
| | - Vincent Morinière
- Assistance Publique - Hôpitaux de Paris, Centre de référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte, Paris, France
- Assistance Publique - Hôpitaux de Paris, Département de Génétique, and
| | - Charline Henry
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
| | - Lara De Tomasi
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
- Paris Diderot University, Paris, France
| | - Madeline Louise Reilly
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
- Paris Diderot University, Paris, France
| | - Camille Humbert
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
| | - Olivier Alibeu
- Genomic Platform, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Paris Descartes Sorbonne Paris Cité University, and
| | - Cécile Fourrage
- Assistance Publique - Hôpitaux de Paris, Département de Génétique, and
- Bioinformatic Plateform, Paris Descartes Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Christine Bole-Feysot
- Genomic Platform, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Paris Descartes Sorbonne Paris Cité University, and
| | - Patrick Nitschké
- Bioinformatic Plateform, Paris Descartes Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Frédéric Tores
- Bioinformatic Plateform, Paris Descartes Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Marc Bras
- Bioinformatic Plateform, Paris Descartes Sorbonne Paris Cité University, Imagine Institute, Paris, France
| | - Marc Jeanpierre
- Paris Descartes Sorbonne Paris Cité University, Paris, France
- Assistance Publique - Hôpitaux de Paris, Département de Génétique, Hôpital Cochin, Paris, France
| | | | - Dominique Gaillard
- Service de Génétique clinique, Centre Hospitalo-Universitaire de Reims, Reims, France
| | - Marie Gonzales
- Assistance Publique - Hôpitaux de Paris, Département de Génétique Médicale, Hôpital Armand Trousseau and Université Pierre et Marie Curie, Paris, France
| | - Robert Novo
- Centre Hospitalo-Universitaire de Lille, Hôpital Jeanne de Flandre, Service de Néphrologie Pédiatrique, Lille, France
| | - Elise Schaefer
- Service de Génétique Médicale, Institut de Génétique Médicale d'Alsace, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Joëlle Roume
- Unité de Génétique Médicale, Centre Hospitalier Intercommunal Poissy, St. Germain en Laye, Poissy, France; and
| | - Jelena Martinovic
- Assistance Publique - Hôpitaux de Paris, Unit of Fetal Pathology, Antoine Béclère Hospital, Clamart, France
| | - Valérie Malan
- Assistance Publique - Hôpitaux de Paris, Service de Cytogénétique, Hôpital Universitaire Necker-Enfants malades, Paris, France
| | - Rémi Salomon
- Assistance Publique - Hôpitaux de Paris, Centre de référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte, Paris, France
- Assistance Publique - Hôpitaux de Paris, Service de Néphrologie Pédiatrique
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
| | - Sophie Saunier
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
| | - Corinne Antignac
- Assistance Publique - Hôpitaux de Paris, Département de Génétique, and
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases
- Paris Descartes Sorbonne Paris Cité University, Paris, France
| | - Cécile Jeanpierre
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1163, Laboratory of Hereditary Kidney Diseases,
- Paris Descartes Sorbonne Paris Cité University, Paris, France
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6
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Le Tanno P, Breton J, Bidart M, Satre V, Harbuz R, Ray PF, Bosson C, Dieterich K, Jaillard S, Odent S, Poke G, Beddow R, Digilio MC, Novelli A, Bernardini L, Pisanti MA, Mackenroth L, Hackmann K, Vogel I, Christensen R, Fokstuen S, Béna F, Amblard F, Devillard F, Vieville G, Apostolou A, Jouk PS, Guebre-Egziabher F, Sartelet H, Coutton C. PBX1 haploinsufficiency leads to syndromic congenital anomalies of the kidney and urinary tract (CAKUT) in humans. J Med Genet 2017; 54:502-510. [PMID: 28270404 DOI: 10.1136/jmedgenet-2016-104435] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/03/2017] [Accepted: 01/17/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Congenital anomalies of the kidney and urinary tract (CAKUT) represent a significant healthcare burden since it is the primary cause of chronic kidney in children. CNVs represent a recurrent molecular cause of CAKUT but the culprit gene remains often elusive. Our study aimed to define the gene responsible for CAKUT in patients with an 1q23.3q24.1 microdeletion. METHODS We describe eight patients presenting with CAKUT carrying an 1q23.3q24.1 microdeletion as identified by chromosomal microarray analysis (CMA). Clinical features were collected, especially the renal and urinary tract phenotype, and extrarenal features. We characterised PBX1 expression and localisation in fetal and adult kidneys using quantitative RT-PCR and immunohistochemistry. RESULTS We defined a 276-kb minimal common region (MCR) that only overlaps with the PBX1 gene. All eight patients presented with syndromic CAKUT. CAKUT were mostly bilateral renal hypoplasia (75%). The most frequent extrarenal symptoms were developmental delay and ear malformations. We demonstrate that PBX1 is strongly expressed in fetal kidneys and brain and expression levels decreased in adult samples. In control fetal kidneys, PBX1 was localised in nuclei of medullary, interstitial and mesenchymal cells, whereas it was present in endothelial cells in adult kidneys. CONCLUSIONS Our results indicate that PBX1 haploinsufficiency leads to syndromic CAKUT as supported by the Pbx1-null mice model. Correct PBX1 dosage appears to be critical for normal nephrogenesis and seems important for brain development in humans. CMA should be recommended in cases of fetal renal anomalies to improve genetic counselling and pregnancy management.
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Affiliation(s)
- Pauline Le Tanno
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
| | - Julie Breton
- Département d'Anatomie et Cytologie Pathologiques, CHU Grenoble Alpes, Grenoble, France
| | - Marie Bidart
- Université Grenoble Alpes, Grenoble, France
- UF Clinatec, Pôle Recherche, CHU Grenoble Alpes, Grenoble, France
| | - Véronique Satre
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
- Université Grenoble Alpes, Grenoble, France
- Equipe "Génétique, Epigénétique et Thérapies de l'Infertilité", Institut Albert Bonniot, La Tronche, France
| | - Radu Harbuz
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
| | - Pierre F Ray
- Université Grenoble Alpes, Grenoble, France
- Equipe "Génétique, Epigénétique et Thérapies de l'Infertilité", Institut Albert Bonniot, La Tronche, France
- Laboratoire de Biochimie Génétique et Moléculaire, Institut de Biologie et Pathologie, CHU Grenoble Alpes, Grenoble, France
| | - Caroline Bosson
- Laboratoire de Biochimie Génétique et Moléculaire, Institut de Biologie et Pathologie, CHU Grenoble Alpes, Grenoble, France
| | - Klaus Dieterich
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
- Université Grenoble Alpes, Grenoble, France
| | - Sylvie Jaillard
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, Université de Rennes, Rennes, France
| | - Sylvie Odent
- CHU Rennes, Service de Génétique Clinique, Centre de Référence Anomalies du Développement CLAD-Ouest, Hôpital Sud, Rennes, France
| | - Gemma Poke
- Genetic Health Service New Zealand Central Hub, Wellington, New Zealand
| | - Rachel Beddow
- Genetic Health Service New Zealand Central Hub, Wellington, New Zealand
| | | | - Antonio Novelli
- Department of Medical Genetics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Laura Bernardini
- Mendel Laboratory IRCCS "Casa Sollievo della Sofferenza" Hospital, Foggia, Italy
| | | | - Luisa Mackenroth
- Institut fuer Klinische Genetik, Medizinische Fakultaet Carl Gustav Carus, Technische Universitaet Dresden, Dresden, Germany
| | - Karl Hackmann
- Institut fuer Klinische Genetik, Medizinische Fakultaet Carl Gustav Carus, Technische Universitaet Dresden, Dresden, Germany
| | - Ida Vogel
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Rikke Christensen
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Siv Fokstuen
- Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland
| | - Frédérique Béna
- Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland
| | - Florence Amblard
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
| | - Francoise Devillard
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
| | - Gaelle Vieville
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
| | - Alexia Apostolou
- Département d'Anatomie et Cytologie Pathologiques, CHU Grenoble Alpes, Grenoble, France
| | - Pierre-Simon Jouk
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
- Université Grenoble Alpes, Grenoble, France
| | | | - Hervé Sartelet
- Département d'Anatomie et Cytologie Pathologiques, CHU Grenoble Alpes, Grenoble, France
- Université Grenoble Alpes, Grenoble, France
| | - Charles Coutton
- Département de Génétique et Procréation, CHU Grenoble Alpes, Grenoble, France
- Equipe "Génétique, Epigénétique et Thérapies de l'Infertilité", Institut Albert Bonniot, La Tronche, France
- Université Grenoble Alpes, Grenoble, France
- Génétique et Procréation, Laboratoire de Génétique Chromosomique, CHU Grenoble Alpes, Grenoble, France
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Al-Bughaili M, Neuhann TM, Flöttmann R, Mundlos S, Spielmann M, Kornak U, Fischer-Zirnsak B. A de novo 1q23.3-q24.2 deletion combined with a GORAB missense mutation causes a distinctive phenotype with cutis laxa. J Hum Genet 2016; 62:325-328. [PMID: 27604556 DOI: 10.1038/jhg.2016.111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 07/26/2016] [Accepted: 08/01/2016] [Indexed: 11/09/2022]
Abstract
Gerodermia osteodysplastica is a recessive segmental progeroid disorder mainly characterized by wrinkled skin, generalized connective tissue weakness, infantile onset osteoporosis and normal intelligence. Coding mutations in GORAB, localized on chromosome 1q24.2, are the cause of this disease. 1q24 deletions underlie a spectrum of disorders with intellectual disability and ear abnormalities as phenotypic hallmarks. Here we report on an individual from Azerbaijan originating from a non-consanguineous couple showing short stature, cutis laxa, frequent fractures, facial dysmorphism, cup-shaped ears and intellectual disability. Sanger sequencing of GORAB revealed the seemingly homozygous missense mutation p.Ser175Phe. This mutation was detected in a heterozygous state in the clinically unaffected mother, but was absent in the healthy father. We performed copy-number investigations by high-resolution array-CGH and PCR approaches and found an ~6 Mb de novo deletion spanning 1q23.3-q24.2 in the affected boy. This novel combination of genetic defects very well explains the phenotype that goes beyond the usual presentation of gerodermia osteodysplastica. Our data provide new insight into the phenotypic spectrum of 1q23-q25 deletions and shows that the combination with another pathogenic allele can lead to more severe clinical manifestations.
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Affiliation(s)
- Mohammed Al-Bughaili
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | | | - Ricarda Flöttmann
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | - Stefan Mundlos
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | - Malte Spielmann
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany
| | - Uwe Kornak
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | - Björn Fischer-Zirnsak
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitaetsmedizin Berlin, Berlin, Germany
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