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Bastos GC, Tolezano GC, Krepischi ACV. Rare CNVs and Known Genes Linked to Macrocephaly: Review of Genomic Loci and Promising Candidate Genes. Genes (Basel) 2022; 13:genes13122285. [PMID: 36553552 PMCID: PMC9778424 DOI: 10.3390/genes13122285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
Macrocephaly frequently occurs in single-gene disorders affecting the PI3K-AKT-MTOR pathway; however, epigenetic mutations, mosaicism, and copy number variations (CNVs) are emerging relevant causative factors, revealing a higher genetic heterogeneity than previously expected. The aim of this study was to investigate the role of rare CNVs in patients with macrocephaly and review genomic loci and known genes. We retrieved from the DECIPHER database de novo <500 kb CNVs reported on patients with macrocephaly; in four cases, a candidate gene for macrocephaly could be pinpointed: a known microcephaly gene-TRAPPC9, and three genes based on their functional roles-RALGAPB, RBMS3, and ZDHHC14. From the literature review, 28 pathogenic CNV genomic loci and over 300 known genes linked to macrocephaly were gathered. Among the genomic regions, 17 CNV loci (~61%) exhibited mirror phenotypes, that is, deletions and duplications having opposite effects on head size. Identifying structural variants affecting head size can be a preeminent source of information about pathways underlying brain development. In this study, we reviewed these genes and recurrent CNV loci associated with macrocephaly, as well as suggested novel potential candidate genes deserving further studies to endorse their involvement with this phenotype.
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Bregin A, Kaare M, Jagomäe T, Karis K, Singh K, Laugus K, Innos J, Leidmaa E, Heinla I, Visnapuu T, Oja EM, Kõiv K, Lilleväli K, Harro J, Philips MA, Vasar E. Expression and impact of Lsamp neural adhesion molecule in the serotonergic neurotransmission system. Pharmacol Biochem Behav 2020; 198:173017. [PMID: 32828972 DOI: 10.1016/j.pbb.2020.173017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/15/2020] [Accepted: 08/17/2020] [Indexed: 12/22/2022]
Abstract
Limbic system associated membrane protein (Lsamp) is a neural adhesion protein which has been recently found to be differentially expressed between serotonergic neuron subtypes. We have previously shown elevated serotonin (5-HT) turnover rate in Lsamp-deficient mice. The purpose of the current study was to elucidate the role of Lsamp in serotonergic neurotransmission. Chronic (18 days) administration of serotonin reuptake inhibitor (SSRI) escitalopram (10 mg/kg) significantly increased general activity in wild-type mice in the open field and protected exploration in Lsamp-/- mice in the elevated-plus maze. An important psychopathology-related endophenotype, elevated 5-HT turnover in the brain of Lsamp-deficient mice, was reproduced in the saline group. Escitalopram restored the elevated 5-HT turnover of Lsamp-deficient mice to a level comparable with their wild-type littermates, suggesting that high 5-HT turnover in mutants is mediated by the increased activity of serotonin transporter (SERT protein encoded by Slc6a4 gene). The baseline level of Slc6a4 transcript was not changed in Lsamp-deficient mice, however, our immunohistochemical analysis showed partial co-expression of Lsamp with both SERT and Tph2 proteins in raphe. Overactivity of SERT in Lsamp-/- mice is further supported by significant elevation of Maoa transcript and increase of DOPAC, another Mao A product, specifically in the raphe. Again, elevation of DOPAC was reduced to the level of wild-type by chronic SSRI treatment. The activity of Lsamp gene promoters varied in 5-HT producing nuclei: both Lsamp 1a and 1b promoters were active in the dorsal raphe; most of the expression in the median raphe was from 1b promoter, whereas Lsamp 1a promoter was almost exclusively active in the caudal subgroup of raphe nuclei. We suggest that Lsamp may have an impact on the integrity of serotonergic synapses, which is possibly the neurochemical basis of the anxiety- and sociability-related phenotype in Lsamp-deficient mice.
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Affiliation(s)
- Aleksandr Bregin
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Maria Kaare
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Toomas Jagomäe
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Karina Karis
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Katyayani Singh
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Karita Laugus
- Division of Neuropsychopharmacology, Department of Psychology, Estonian Centre of Behavioural and Health Sciences, University of Tartu, Estonia
| | - Jürgen Innos
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Este Leidmaa
- Institute of Molecular Psychiatry, Medical Faculty, University of Bonn, Bonn, Germany
| | - Indrek Heinla
- Department of Psychology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Tanel Visnapuu
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Eva-Maria Oja
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Kadri Kõiv
- Division of Neuropsychopharmacology, Department of Psychology, Estonian Centre of Behavioural and Health Sciences, University of Tartu, Estonia
| | - Kersti Lilleväli
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Jaanus Harro
- Division of Neuropsychopharmacology, Department of Psychology, Estonian Centre of Behavioural and Health Sciences, University of Tartu, Estonia
| | - Mari-Anne Philips
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia.
| | - Eero Vasar
- Department of Physiology, Institute of Biomedicine and Translational Medicine, University of Tartu, 19 Ravila Street, 50411 Tartu, Estonia; Centre of Excellence in Genomics and Translational Medicine, University of Tartu, Tartu, Estonia
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Primrose syndrome: a phenotypic comparison of patients with a ZBTB20 missense variant versus a 3q13.31 microdeletion including ZBTB20. Eur J Hum Genet 2020; 28:1044-1055. [PMID: 32071410 DOI: 10.1038/s41431-020-0582-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 11/14/2019] [Accepted: 12/03/2019] [Indexed: 12/23/2022] Open
Abstract
Primrose syndrome is characterized by variable intellectual deficiency, behavior disorders, facial features with macrocephaly, and a progressive phenotype with hearing loss and ectopic calcifications, distal muscle wasting, and contractures. In 2014, ZBTB20 variants were identified as responsible for this syndrome. Indeed, ZBTB20 plays an important role in cognition, memory, learning processes, and has a transcription repressive effect on numerous genes. A more severe phenotype was discussed in patients with missense single nucleotide variants than in those with large deletions. Here, we report on the clinical and molecular results of 14 patients: 6 carrying ZBTB20 missense SNVs, 1 carrying an early truncating indel, and 7 carrying 3q13.31 deletions, recruited through the AnDDI-Rares network. We compared their phenotypes and reviewed the data of the literature, in order to establish more powerful phenotype-genotype correlations. All 57 patients presented mild-to-severe ID and/or a psychomotor delay. Facial features were similar with macrocephaly, prominent forehead, downslanting palpebral fissures, ptosis, and large ears. Hearing loss was far more frequent in patients with missense SNVs (p = 0.002), ectopic calcification, progressive muscular wasting, and contractures were observed only in patients with missense SNVs (p nonsignificant). Corpus callosum dysgenesis (p = 0.00004), hypothyroidism (p = 0.047), and diabetes were also more frequent in this group. However, the median age was 9.4 years in patients with deletions and truncating variant compared with 15.1 years in those with missense SNVs. Longer follow-up will be necessary to determine whether the phenotype of patients with deletions is also progressive.
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Identification of novel genomic imbalances in Saudi patients with congenital heart disease. Mol Cytogenet 2018; 11:9. [PMID: 29416564 PMCID: PMC5784682 DOI: 10.1186/s13039-018-0356-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 01/03/2018] [Indexed: 11/10/2022] Open
Abstract
Background Quick genetic diagnosis of a patient with congenital heart disease (CHD) is quite important for proper health care and management. Copy number variations (CNV), chromosomal imbalances and rearrangements have been frequently associated with CHD. Previously, due to limitations of microscope based standard karyotyping techniques copious CNVs and submicroscopic imbalances could not be detected in numerous CHD patients. The aim of our study is to identify cytogenetic abnormalities among the selected CHD cases (n = 17) of the cohort using high density oligo arrays. Results Our screening study indicated that six patients (~35%) have various cytogenetic abnormalities. Among the patients, only patient 2 had a duplication whereas the rest carried various deletions. The patients 1, 4 and 6 have only single large deletions throughout their genome; a 3.2 Mb deletion on chromosome 7, a 3.35 Mb deletion on chromosome 3, and a 2.78 Mb a deletion on chromosome 2, respectively. Patients 3 and 5 have two deletions on different chromosomes. Patient 3 has deletions on chromosome 2 (2q24.1; 249 kb) and 16 (16q22.2; 1.8 Mb). Patient 4 has a 3.35 Mb an interstitial deletion on chromosome 3 (3q13.2q13.31).Based on our search on the latest available literature, our study is the first inclusive array CGH evaluation on Saudi cohort of CHD patients. Conclusions This study emphasizes the importance of the arrays in genetic diagnosis of CHD. Based on our results the high resolution arrays should be utilized as first-tier diagnostic tool in clinical care as suggested before by others. Moreover, previously evaluated negative CHD cases (based on standard karyotyping methods) should be re-examined by microarray based cytogenetic methods.
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Kjeldsen E. Characterization of an acquired jumping translocation involving 3q13.31-qter in a patient with de novo acute monocytic leukemia. Exp Mol Pathol 2017. [PMID: 28625614 DOI: 10.1016/j.yexmp.2017.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We studied an adult with de novo acute monocytic leukemia and a dismal outcome where her leukemic cells harbored an acquired rare jumping translocation (JT). We used oligo-based array CGH (oaCGH) analysis, fluorescence in situ hybridization (FISH), and 24-color karyotyping to enhance the characterization of the JT. G-banding detected a JT involving the 3q13.3-qter chromosomal segment and the recipient chromosomal regions 17p, 8q, and 15q. Each clone with JT was associated with trisomy 8. oaCGH analysis revealed an additional submicroscopic deletion in 3q13.31 as well as small subtelomeric duplications on several chromosomes. Locus-specific FISH with BAC-based probes from the 3q13.31-q13.32 region showed great heterogeneity. Telomere FISH revealed significantly reduced telomeric content in the aberrant cells with JT compared with cytogenetically normal cells at diagnosis and in normal cells at complete remission. A literature search revealed two previous de novo AML-M5 cases of JT involving the 3q13.3-qter chromosomal segment and concomitant trisomy 8. In addition, a case with an unbalanced der(Y)t(Y;3)(q12;q13.31) and additional trisomy 8 was previously reported in a patient with de novo AML-M5. All of these cases had a dismal outcome. In the present case, and in the der(Y)t(Y;3) case, a concurrent submicroscopic deletion at 3q13.31 was observed affecting the TUSC7 gene. Duplication of 3q13.31-qter might be a non-random chromosomal abnormality with concomitant submicroscopic deletion at 3q13.31 occurring in rare cases of acute monocytic leukemia, being associated with adverse prognosis. The impact of shortened telomeres in forming the JT is reviewed.
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MESH Headings
- Aged
- Chromosome Deletion
- Chromosome Duplication
- Chromosomes, Human, Pair 3/genetics
- Chromosomes, Human, Pair 8/genetics
- Cloning, Molecular
- Comparative Genomic Hybridization
- DNA Copy Number Variations
- Female
- Humans
- In Situ Hybridization, Fluorescence
- Karyotyping
- Leukemia, Monocytic, Acute/diagnosis
- Leukemia, Monocytic, Acute/genetics
- Prognosis
- Translocation, Genetic
- Trisomy/genetics
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Affiliation(s)
- Eigil Kjeldsen
- Cancercytogenetic Section, Hemodiagnostic Laboratory, Department of Hematology, Center for Cancer and Inflammation, Aarhus University Hospital, Tage Hansens Gade 2, Ent. 4A, DK-8000 Aarhus C, Denmark.
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Xie L, Luo X, Yang J, Wang J, Nie C, Wang Z. A Chinese patient with Toriello-Carey syndrome and an interstitial deletion of 3q. Am J Med Genet A 2016; 173:721-726. [PMID: 27748028 DOI: 10.1002/ajmg.a.38009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Accepted: 09/21/2016] [Indexed: 01/13/2023]
Abstract
Toriello-Carey syndrome (T-CS), which was first described by Toriello and Carey, is a rare multiple congenital anomaly syndrome characterized by agenesis of the corpus callosum, Pierre Robin sequence, unusual facial appearance, and other anomalies. Tracheal or laryngeal anomalies are reported as a common manifestation of T-CS. These anomalies can lead to respiratory distress and respiratory tract infection. The cause of T-CS is unknown, although there have been reports of patients with a clinical diagnosis of T-CS and a chromosome anomaly. We describe another such patient who was found to have an interstitial deletion of 3q (3q12.1-q21.3). © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Lulu Xie
- NICU, Guangdong Women and Children Hospital of Guangzhou Medical University, Guangdong, China
| | - Xianqiong Luo
- NICU, Guangdong Women and Children Hospital of Guangzhou Medical University, Guangdong, China
| | - Jie Yang
- NICU, Guangdong Women and Children Hospital of Guangzhou Medical University, Guangdong, China
| | - Junping Wang
- NICU, Guangdong Women and Children Hospital of Guangzhou Medical University, Guangdong, China
| | - Chuan Nie
- NICU, Guangdong Women and Children Hospital of Guangzhou Medical University, Guangdong, China
| | - Zhu Wang
- NICU, Guangdong Women and Children Hospital of Guangzhou Medical University, Guangdong, China
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Hervé B, Fauvert D, Dard R, Roume J, Cognard S, Goidin D, Lozach F, Molina-Gomes D, Vialard F. The emerging microduplication 3q13.31: Expanding the genotype-phenotype correlations of the reciprocal microdeletion 3q13.31 syndrome. Eur J Med Genet 2016; 59:463-9. [DOI: 10.1016/j.ejmg.2016.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 07/18/2016] [Accepted: 08/23/2016] [Indexed: 01/26/2023]
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Tonchev AB, Tuoc TC, Rosenthal EH, Studer M, Stoykova A. Zbtb20 modulates the sequential generation of neuronal layers in developing cortex. Mol Brain 2016; 9:65. [PMID: 27282384 PMCID: PMC4901408 DOI: 10.1186/s13041-016-0242-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 05/21/2016] [Indexed: 11/25/2022] Open
Abstract
Background During corticogenesis, genetic programs encoded in progenitor cells at different developmental stages and inherited in postmitotic neurons specify distinct layer and area identities. Transcription factor Zbtb20 has been shown to play a role for hippocampal development but whether it is implicated in mammalian neocortical morphogenesis remains unknown. Results Here, we report that during embyogenesis transcription factor Zbtb20 has a dynamic spatio-temporal expression pattern in mitotic cortical progenitors through which it modulates the sequential generation of cortical neuronal layer identities. Zbtb20 knock out mice exhibited enhanced populations of early born L6-L4 neuronal subtypes and a dramatic reduction of the late born L3/L2 neurons. This defect was due to a temporal misbalance in the production of earlier versus later born neurons, leading to a progressive diminishing of the progenitor pool for the generation of L3-L2 neurons. Zbtb20 implements these temporal effects in part by binding to promoter of the orphan nuclear receptor CoupTF1/Nr2f1. In addition to its effects exerted in cortical progenitors, the postmitotic expression of Zbtb20 in L3/L2 neurons starting at birth may contribute to their proper differentiation and migration. Conclusions Our findings reveal Zbtb20 as a novel temporal regulator for the generation of layer-specific neuronal identities. Electronic supplementary material The online version of this article (doi:10.1186/s13041-016-0242-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anton B Tonchev
- Molecular Developmental Neurobiology Laboratory, Max Planck Institute of Biophysical Chemistry, Am Fassberg, 37077, Gottingen, Germany. .,Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), 37075, Göttingen, Germany. .,Department of Anatomy, Histology and Embryology, Medical University-Varna, Varna, Bulgaria.
| | - Tran Cong Tuoc
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), 37075, Göttingen, Germany.,Molecular Neurobiology Group, Institute of Neuroanatomy, University of Goettingen Medical Center, Goettingen, Germany
| | - Eva H Rosenthal
- Molecular Developmental Neurobiology Laboratory, Max Planck Institute of Biophysical Chemistry, Am Fassberg, 37077, Gottingen, Germany
| | - Michèle Studer
- University Nice Sophia Antipolis, iBV, UMR 7277, F-06108, Nice, France.,Inserm, iBV, U1091, F-06108, Nice, France
| | - Anastassia Stoykova
- Molecular Developmental Neurobiology Laboratory, Max Planck Institute of Biophysical Chemistry, Am Fassberg, 37077, Gottingen, Germany. .,Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), 37075, Göttingen, Germany. .,Department of Anatomy, Histology and Embryology, Medical University-Varna, Varna, Bulgaria.
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Quintela I, Gomez-Guerrero L, Fernandez-Prieto M, Resches M, Barros F, Carracedo A. Female patient with autistic disorder, intellectual disability, and co-morbid anxiety disorder: Expanding the phenotype associated with the recurrent 3q13.2-q13.31 microdeletion. Am J Med Genet A 2015; 167A:3121-9. [PMID: 26332054 DOI: 10.1002/ajmg.a.37292] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 08/02/2015] [Indexed: 01/13/2023]
Abstract
In recent years, the advent of comparative genomic hybridization (CGH) and single nucleotide polymorphism (SNP) arrays and its use as a first genetic test for the diagnosis of patients with neurodevelopmental phenotypes has allowed the identification of novel submicroscopic chromosomal abnormalities (namely, copy number variants or CNVs), imperceptible by conventional cytogenetic techniques. The 3q13.31 microdeletion syndrome (OMIM #615433) has been defined as a genomic disorder mainly characterized by developmental delay, postnatal overgrowth, hypotonia, genital abnormalities in males, and characteristic craniofacial features. Although the 3q13.31 CNVs are variable in size, a 3.4 Mb recurrently altered region at 3q13.2-q13.31 has been recently described and non-allelic homologous recombination (NAHR) mediated by flanking human endogenous retrovirus (HERV-H) elements has been suggested as the mechanism of deletion formation. We expand the phenotypic spectrum associated with this recurrent deletion performing the clinical description of a 9-year-old female patient with autistic disorder, total absence of language, intellectual disability, anxiety disorder and disruptive, and compulsive eating behaviors. The array-based molecular karyotyping allowed the identification of a de novo recurrent 3q13.2-q13.31 deletion encompassing 25 genes. In addition, we compare her clinical phenotype with previous reports of patients with neurodevelopmental and behavioral disorders and proximal 3q microdeletions. Finally, we also review the candidate genes proposed so far for these phenotypes.
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Affiliation(s)
- Ines Quintela
- Grupo de Medicina Xenomica, Universidade de Santiago de Compostela, Centro Nacional de Genotipado-Plataforma de Recursos Biomoleculares y Bioinformaticos-Instituto de Salud Carlos III (CeGen-PRB2-ISCIII), Santiago de Compostela, Spain
| | - Lorena Gomez-Guerrero
- Grupo de Medicina Xenomica, CIBERER, Fundacion Publica Galega de Medicina Xenomica-SERGAS, Santiago de Compostela, Spain
| | - Montse Fernandez-Prieto
- Grupo de Medicina Xenomica, CIBERER, Fundacion Publica Galega de Medicina Xenomica-SERGAS, Santiago de Compostela, Spain
| | - Mariela Resches
- Departamento de Psicologia Evolutiva y de la Educacion, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Francisco Barros
- Grupo de Medicina Xenomica, CIBERER, Fundacion Publica Galega de Medicina Xenomica-SERGAS, Santiago de Compostela, Spain
| | - Angel Carracedo
- Grupo de Medicina Xenomica, Universidade de Santiago de Compostela, Centro Nacional de Genotipado-Plataforma de Recursos Biomoleculares y Bioinformaticos-Instituto de Salud Carlos III (CeGen-PRB2-ISCIII), Santiago de Compostela, Spain.,Grupo de Medicina Xenomica, CIBERER, Fundacion Publica Galega de Medicina Xenomica-SERGAS, Santiago de Compostela, Spain.,Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia
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Rasmussen MB, Nielsen JV, Lourenço CM, Melo JB, Halgren C, Geraldi CVL, Marques W, Rodrigues GR, Thomassen M, Bak M, Hansen C, Ferreira SI, Venâncio M, Henriksen KF, Lind-Thomsen A, Carreira IM, Jensen NA, Tommerup N. Neurodevelopmental disorders associated with dosage imbalance ofZBTB20correlate with the morbidity spectrum of ZBTB20 candidate target genes. J Med Genet 2014; 51:605-13. [DOI: 10.1136/jmedgenet-2014-102535] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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12
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Vuillaume ML, Naudion S, Banneau G, Diene G, Cartault A, Cailley D, Bouron J, Toutain J, Bourrouillou G, Vigouroux A, Bouneau L, Nacka F, Kieffer I, Arveiler B, Knoll-Gellida A, Babin PJ, Bieth E, Jouret B, Julia S, Sarda P, Geneviève D, Faivre L, Lacombe D, Barat P, Tauber M, Delrue MA, Rooryck C. New candidate loci identified by array-CGH in a cohort of 100 children presenting with syndromic obesity. Am J Med Genet A 2014; 164A:1965-75. [PMID: 24782328 DOI: 10.1002/ajmg.a.36587] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 03/31/2014] [Indexed: 12/13/2022]
Abstract
Syndromic obesity is defined by the association of obesity with one or more feature(s) including developmental delay, dysmorphic traits, and/or congenital malformations. Over 25 syndromic forms of obesity have been identified. However, most cases remain of unknown etiology. The aim of this study was to identify new candidate loci associated with syndromic obesity to find new candidate genes and to better understand molecular mechanisms involved in this pathology. We performed oligonucleotide microarray-based comparative genomic hybridization in a cohort of 100 children presenting with syndromic obesity of unknown etiology, after exhaustive clinical, biological, and molecular studies. Chromosomal copy number variations were detected in 42% of the children in our cohort, with 23% of patients with potentially pathogenic copy number variants. Our results support that chromosomal rearrangements are frequently associated with syndromic obesity with a variety of contributory genes having relevance to either obesity or developmental delay. A list of inherited or apparently de novo duplications and deletions including their enclosed genes and not previously linked to syndromic obesity was established. Proteins encoded by several of these genes are involved in lipid metabolism (ACOXL, MSMO1, MVD, and PDZK1) linked with nervous system function (BDH1 and LINGO2), neutral lipid storage (PLIN2), energy homeostasis and metabolic processes (CDH13, CNTNAP2, CPPED1, NDUFA4, PTGS2, and SOCS6).
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Affiliation(s)
- Marie-Laure Vuillaume
- CHU Bordeaux, Service de Génétique Médicale, Bordeaux, France; Univ. Bordeaux, Maladies Rares : Génétique et Métabolisme (MRGM), EA 4576, Bordeaux, France
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Lowther C, Costain G, Melvin R, Stavropoulos DJ, Lionel AC, Marshall CR, Scherer SW, Bassett AS. Adult expression of a 3q13.31 microdeletion. Mol Cytogenet 2014; 7:23. [PMID: 24650298 PMCID: PMC4022390 DOI: 10.1186/1755-8166-7-23] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 03/11/2014] [Indexed: 11/30/2022] Open
Abstract
Background The emerging 3q13.31 microdeletion syndrome appears to encompass diverse neurodevelopmental conditions. However, the 3q13.31 deletion is rare and few adult cases have yet been reported. We examined a cohort with schizophrenia (n = 459) and adult control subjects (n = 26,826) using high-resolution microarray technology for deletions and duplications at the 3q13.31 locus. Results We report on the extended adult phenotype associated with a 3q13.31 microdeletion in a 41-year-old male proband with schizophrenia and a nonverbal learning disability. He was noted to have a speech impairment, delayed motor skills, and other features consistent with the 3q13.31 microdeletion syndrome. The 2.06 Mb deletion overlapped two microRNAs and seven RefSeq genes, including GAP43, LSAMP, DRD3, and ZBTB20. No overlapping 3q13.31 deletions or duplications were identified in control subjects. Conclusions Later-onset conditions like schizophrenia are increasingly associated with rare copy number variations and associated genomic disorders like the 3q13.31 microdeletion syndrome. Detailed phenotype information across the lifespan facilitates genotype-phenotype correlations, accurate genetic counselling, and anticipatory care.
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Affiliation(s)
| | | | | | | | | | | | | | - Anne S Bassett
- Clinical Genetics Research Program, Centre for Addiction and Mental Health, Toronto, ON, Canada.
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