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Tolezano GC, Bastos GC, da Costa SS, Freire BL, Homma TK, Honjo RS, Yamamoto GL, Passos-Bueno MR, Koiffmann CP, Kim CA, Vianna-Morgante AM, de Lima Jorge AA, Bertola DR, Rosenberg C, Krepischi ACV. Burden of Rare Copy Number Variants in Microcephaly: A Brazilian Cohort of 185 Microcephalic Patients and Review of the Literature. J Autism Dev Disord 2024; 54:1181-1212. [PMID: 36502452 DOI: 10.1007/s10803-022-05853-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2022] [Indexed: 12/14/2022]
Abstract
Microcephaly presents heterogeneous genetic etiology linked to several neurodevelopmental disorders (NDD). Copy number variants (CNVs) are a causal mechanism of microcephaly whose investigation is a crucial step for unraveling its molecular basis. Our purpose was to investigate the burden of rare CNVs in microcephalic individuals and to review genes and CNV syndromes associated with microcephaly. We performed chromosomal microarray analysis (CMA) in 185 Brazilian patients with microcephaly and evaluated microcephalic patients carrying < 200 kb CNVs documented in the DECIPHER database. Additionally, we reviewed known genes and CNV syndromes causally linked to microcephaly through the PubMed, OMIM, DECIPHER, and ClinGen databases. Rare clinically relevant CNVs were detected in 39 out of the 185 Brazilian patients investigated by CMA (21%). In 31 among the 60 DECIPHER patients carrying < 200 kb CNVs, at least one known microcephaly gene was observed. Overall, four gene sets implicated in microcephaly were disclosed: known microcephaly genes; genes with supporting evidence of association with microcephaly; known macrocephaly genes; and novel candidates, including OTUD7A, BBC3, CNTN6, and NAA15. In the review, we compiled 957 known microcephaly genes and 58 genomic CNV loci, comprising 13 duplications and 50 deletions, which have already been associated with clinical findings including microcephaly. We reviewed genes and CNV syndromes previously associated with microcephaly, reinforced the high CMA diagnostic yield for this condition, pinpointed novel candidate loci linked to microcephaly deserving further evaluation, and provided a useful resource for future research on the field of neurodevelopment.
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Affiliation(s)
- Giovanna Cantini Tolezano
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Giovanna Civitate Bastos
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Silvia Souza da Costa
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Bruna Lucheze Freire
- Unidade de Endocrinologia Genética (LIM25), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 455 Avenida Doutor Arnaldo, São Paulo, SP, 01246-903, Brazil
| | - Thais Kataoka Homma
- Unidade de Endocrinologia Genética (LIM25), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 455 Avenida Doutor Arnaldo, São Paulo, SP, 01246-903, Brazil
| | - Rachel Sayuri Honjo
- Unidade de Genética do Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 647 Avenida Doutor Enéas Carvalho de Aguiar, São Paulo, SP, 05403-900, Brazil
| | - Guilherme Lopes Yamamoto
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
- Unidade de Genética do Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 647 Avenida Doutor Enéas Carvalho de Aguiar, São Paulo, SP, 05403-900, Brazil
| | - Maria Rita Passos-Bueno
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Celia Priszkulnik Koiffmann
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Chong Ae Kim
- Unidade de Genética do Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 647 Avenida Doutor Enéas Carvalho de Aguiar, São Paulo, SP, 05403-900, Brazil
| | - Angela Maria Vianna-Morgante
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Alexander Augusto de Lima Jorge
- Unidade de Endocrinologia Genética (LIM25), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 455 Avenida Doutor Arnaldo, São Paulo, SP, 01246-903, Brazil
| | - Débora Romeo Bertola
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
- Unidade de Genética do Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, 647 Avenida Doutor Enéas Carvalho de Aguiar, São Paulo, SP, 05403-900, Brazil
| | - Carla Rosenberg
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil
| | - Ana Cristina Victorino Krepischi
- Department of Genetics and Evolutionary Biology, Human Genome and Stem-Cell Research Center, Institute of Biosciences, University of São Paulo, 106 Rua do Matão, São Paulo, SP, 05508-090, Brazil.
- Institute of Biosciences, University of São Paulo, 277 Rua do Matão, São Paulo, SP, 05508-090, Brazil.
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Zhang Y, Yan M, Yu Y, Wang J, Jiao Y, Zheng M, Zhang S. 14-3-3ε: a protein with complex physiology function but promising therapeutic potential in cancer. Cell Commun Signal 2024; 22:72. [PMID: 38279176 PMCID: PMC10811864 DOI: 10.1186/s12964-023-01420-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/02/2023] [Indexed: 01/28/2024] Open
Abstract
Over the past decade, the role of the 14-3-3 protein has received increasing interest. Seven subtypes of 14-3-3 proteins exhibit high homology; however, each subtype maintains its specificity. The 14-3-3ε protein is involved in various physiological processes, including signal transduction, cell proliferation, apoptosis, autophagy, cell cycle regulation, repolarization of cardiac action, cardiac development, intracellular electrolyte homeostasis, neurodevelopment, and innate immunity. It also plays a significant role in the development and progression of various diseases, such as cardiovascular diseases, inflammatory diseases, neurodegenerative disorders, and cancer. These immense and various involvements of 14-3-3ε in diverse processes makes it a promising target for drug development. Although extensive research has been conducted on 14-3-3 dimers, studies on 14-3-3 monomers are limited. This review aimed to provide an overview of recent reports on the molecular mechanisms involved in the regulation of binding partners by 14-3-3ε, focusing on issues that could help advance the frontiers of this field. Video Abstract.
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Affiliation(s)
- Yue Zhang
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Man Yan
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Yongjun Yu
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, 300121, People's Republic of China
| | - Jiangping Wang
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Yuqi Jiao
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Minying Zheng
- Department of Pathology, Tianjin Union Medical Center, Tianjin, 300071, People's Republic of China
| | - Shiwu Zhang
- Department of Pathology, Tianjin Union Medical Center, Tianjin, 300071, People's Republic of China.
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3
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Denommé-Pichon AS, Collins SC, Bruel AL, Mikhaleva A, Wagner C, Vancollie VE, Thomas Q, Chevarin M, Weber M, Prada CE, Overs A, Palomares-Bralo M, Santos-Simarro F, Pacio-Míguez M, Busa T, Legius E, Bacino CA, Rosenfeld JA, Le Guyader G, Egloff M, Le Guillou X, Mencarelli MA, Renieri A, Grosso S, Levy J, Dozières B, Desguerre I, Vitobello A, Duffourd Y, Lelliott CJ, Thauvin-Robinet C, Philippe C, Faivre L, Yalcin B. YWHAE loss of function causes a rare neurodevelopmental disease with brain abnormalities in human and mouse. Genet Med 2023; 25:100835. [PMID: 36999555 DOI: 10.1016/j.gim.2023.100835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 03/20/2023] [Accepted: 03/23/2023] [Indexed: 03/30/2023] Open
Abstract
PURPOSE Miller-Dieker syndrome is caused by a multiple gene deletion, including PAFAH1B1 and YWHAE. Although deletion of PAFAH1B1 causes lissencephaly unambiguously, deletion of YWHAE alone has not clearly been linked to a human disorder. METHODS Cases with YWHAE variants were collected through international data sharing networks. To address the specific impact of YWHAE loss of function, we phenotyped a mouse knockout of Ywhae. RESULTS We report a series of 10 individuals with heterozygous loss-of-function YWHAE variants (3 single-nucleotide variants and 7 deletions <1 Mb encompassing YWHAE but not PAFAH1B1), including 8 new cases and 2 follow-ups, added with 5 cases (copy number variants) from literature review. Although, until now, only 1 intragenic deletion has been described in YWHAE, we report 4 new variants specifically in YWHAE (3 splice variants and 1 intragenic deletion). The most frequent manifestations are developmental delay, delayed speech, seizures, and brain malformations, including corpus callosum hypoplasia, delayed myelination, and ventricular dilatation. Individuals with variants affecting YWHAE alone have milder features than those with larger deletions. Neuroanatomical studies in Ywhae-/- mice revealed brain structural defects, including thin cerebral cortex, corpus callosum dysgenesis, and hydrocephalus paralleling those seen in humans. CONCLUSION This study further demonstrates that YWHAE loss-of-function variants cause a neurodevelopmental disease with brain abnormalities.
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Affiliation(s)
- Anne-Sophie Denommé-Pichon
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France; European Reference Network, ERN-ITHACA.
| | - Stephan C Collins
- UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France
| | - Ange-Line Bruel
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France
| | - Anna Mikhaleva
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | | | | | - Quentin Thomas
- UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France; Department of Neurology, Dijon Bourgogne University Hospital, Dijon, France
| | - Martin Chevarin
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France
| | - Mathys Weber
- UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France; Department of Genetics and Reference Center for Development Disorders and Intellectual Disabilities, FHU-TRANSLAD and GIMI Institute, Dijon Bourgogne University Hospital, Dijon, France
| | - Carlos E Prada
- Division of Genetics, Birth Defects & Metabolism, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - Alexis Overs
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France
| | - María Palomares-Bralo
- European Reference Network, ERN-ITHACA; Institute of Medical and Molecular Genetics (INGEMM), La Paz University Hospital, Autonomous University of Madrid, IdiPAZ, Madrid, Spain; Rare Diseases Networking Biomedical Research Centre (CIBERER), Carlos III Institute, Madrid, Spain
| | - Fernando Santos-Simarro
- European Reference Network, ERN-ITHACA; Institute of Medical and Molecular Genetics (INGEMM), La Paz University Hospital, Autonomous University of Madrid, IdiPAZ, Madrid, Spain; Rare Diseases Networking Biomedical Research Centre (CIBERER), Carlos III Institute, Madrid, Spain
| | - Marta Pacio-Míguez
- Rare Diseases Networking Biomedical Research Centre (CIBERER), Carlos III Institute, Madrid, Spain
| | - Tiffany Busa
- Department of Medical Genetics, CHU Timone Enfants, AP-HM, Marseille, France
| | - Eric Legius
- Laboratory for Neurofibromatosis Research, Department of Human Genetics, KU Leuven University Hospital, Belgium
| | - Carlos A Bacino
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX; Baylor Genetics Laboratories, Houston, TX
| | - Gwenaël Le Guyader
- Genetics Department, Poitiers University Hospital, Poitiers, France; University of Poitiers, Poitiers, France
| | - Matthieu Egloff
- Genetics Department, Poitiers University Hospital, Poitiers, France; University of Poitiers, Poitiers, France; Experimental and Clinical Neurosciences Laboratory, INSERM, University of Poitiers, Poitiers, France
| | - Xavier Le Guillou
- Genetics Department, Poitiers University Hospital, Poitiers, France; University of Poitiers, Poitiers, France
| | | | - Alessandra Renieri
- Medical Genetics, Azienda Ospedaliero-Universitaria Senese, Siena, Italy; Medical Genetics, University of Siena, Siena, Italy; Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Salvatore Grosso
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy; U.O.C. Pediatria, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Jonathan Levy
- Genetics Department, Robert-Debré University Hospital, APHP, Paris, France
| | - Blandine Dozières
- Department of Pediatric Neurology and Metabolic Diseases, Robert Debré University Hospital, APHP, Paris, France
| | - Isabelle Desguerre
- Departments of Pediatric Neurology and Medical Genetics, Hôpital Necker-Enfants Malades, Université Paris Cité, Paris, France
| | - Antonio Vitobello
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France; European Reference Network, ERN-ITHACA
| | - Yannis Duffourd
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France
| | | | - Christel Thauvin-Robinet
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France; Department of Genetics and Reference Center for Development Disorders and Intellectual Disabilities, FHU-TRANSLAD and GIMI Institute, Dijon Bourgogne University Hospital, Dijon, France
| | - Christophe Philippe
- Functional Unit for Diagnostic Innovation in Rare Diseases, FHU-TRANSLAD, Dijon Bourgogne University Hospital, Dijon, France; UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France
| | - Laurence Faivre
- UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France; European Reference Network, ERN-ITHACA; Department of Genetics and Reference Center for Development Disorders and Intellectual Disabilities, FHU-TRANSLAD and GIMI Institute, Dijon Bourgogne University Hospital, Dijon, France
| | - Binnaz Yalcin
- UMR1231 GAD "Génétique des Anomalies du Développement", INSERM, FHU-TRANSLAD, University of Burgundy, Dijon, France.
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4
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Jin M, Liu Y, Hu G, Li X, Jia N, Cui X, Li Z, Ai L, Xie M, Xue F, Yang Y, Li W, Zhang M, Yu Q. Establishment of a schizophrenia classifier based on peripheral blood signatures and investigation of pathogenic miRNA-mRNA regulation. J Psychiatr Res 2023; 159:172-184. [PMID: 36738648 DOI: 10.1016/j.jpsychires.2023.01.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/04/2023] [Accepted: 01/26/2023] [Indexed: 01/30/2023]
Abstract
To date, the diagnosis of schizophrenia (SCZ) mainly relies on patients' or guardians' self-reports and clinical observation, and the pathogenesis of SCZ remains elusive. In this study, we sought to develop a reliable classifier for diagnosing SCZ patients and provide clues to the etiology and pathogenesis of SCZ. Based on the high throughput sequencing analysis of peripheral blood miRNA expression profile and weighted gene co-expression network analysis (WGCNA) in our previous study, we selected eleven hub miRNAs for validation by qRT-PCR in 51 SCZ patients and 51 controls. miR-939-5p, miR-4732-3p let-7d-3p, and miR-142-3p were confirmed to be significantly up-regulated, and miR-30e-3p and miR-23a-3p were down-regulated in SCZ patients. miR-30e-3p with the most considerable fold change and statistically significance was selected for targeting validation. We first performed bioinformatics prediction followed by qRT-PCR and verified the up-regulation of potential target mRNAs (ABI1, NMT1, HMGB1) expression. Next, we found that the expression level of ABI1 was significantly up-regulated in SH-SY5Y cells transfected with miR-30e-3p mimics. Lastly, we conducted a luciferase assay in 293T cells confirming that miR-30e-3p could directly bind with the 3'untranslated region (3'-UTR) of ABI1, revealing that miR-30e-3p might play a role in the polymerization of neuronal actin and the reconstruction of the cytoskeleton via the downstream regulation of ABI1. In addition, we constructed a classifier by a series of bioinformatics algorithms and evaluated its diagnostic performance. It appears that the classifier consists of miRNAs and mRNAs possess a better discrimination performance than individual miRNA or mRNA in SCZ.
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Affiliation(s)
- Mengdi Jin
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Yane Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Guoyan Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Xinwei Li
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Ningning Jia
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Xingyao Cui
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Zhijun Li
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Lizhe Ai
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Mengtong Xie
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Fengyu Xue
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Yuqing Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Weizhen Li
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Min Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China
| | - Qiong Yu
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, 130021, China.
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5
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Baker EK, Brewer CJ, Ferreira L, Schapiro M, Tenney J, Wied HM, Kline-Fath BM, Smolarek TA, Weaver KN, Hopkin RJ. Further expansion and confirmation of phenotype in rare loss of YWHAE gene distinct from Miller-Dieker syndrome. Am J Med Genet A 2023; 191:526-539. [PMID: 36433683 PMCID: PMC10099970 DOI: 10.1002/ajmg.a.63057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/21/2022] [Accepted: 11/12/2022] [Indexed: 11/27/2022]
Abstract
Deletion of 17p13.3 has varying degrees of severity on brain development based on precise location and size of the deletion. The most severe phenotype is Miller-Dieker syndrome (MDS) which is characterized by lissencephaly, dysmorphic facial features, growth failure, developmental disability, and often early death. Haploinsufficiency of PAFAH1B1 is responsible for the characteristic lissencephaly in MDS. The precise role of YWHAE haploinsufficiency in MDS is unclear. Case reports are beginning to elucidate the phenotypes of individuals with 17p13.3 deletions that have deletion of YWHAE but do not include deletion of PAFAH1B1. Through our clinical genetics practice, we identified four individuals with 17p13.3 deletion that include YWHAE but not PAFAH1B1. These patients have a similar phenotype of dysmorphic facial features, developmental delay, and leukoencephalopathy. In a review of the literature, we identified 19 patients with 17p13.3 microdeletion sparing PAFAH1B1 but deleting YWHAE. Haploinsufficiency of YWHAE is associated with brain abnormalities including cystic changes. These individuals have high frequency of epilepsy, intellectual disability, and dysmorphic facial features including prominent forehead, epicanthal folds, and broad nasal root. We conclude that deletion of 17p13.3 excluding PAFAH1B1 but including YWHAE is associated with a consistent phenotype and should be considered a distinct condition from MDS.
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Affiliation(s)
- Elizabeth K Baker
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Casey J Brewer
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Leonardo Ferreira
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Mark Schapiro
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Division of Neurology, Cincinnati Children's Hospital Medicine, Cincinnati, Ohio, USA
| | - Jeffrey Tenney
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Division of Neurology, Cincinnati Children's Hospital Medicine, Cincinnati, Ohio, USA
| | - Heather M Wied
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Division of Neurology, Cincinnati Children's Hospital Medicine, Cincinnati, Ohio, USA
| | - Beth M Kline-Fath
- Division of Radiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Teresa A Smolarek
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - K Nicole Weaver
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Robert J Hopkin
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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6
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Da Silva JD, Gonzaga D, Barreta A, Correia H, Fortuna AM, Soares AR, Tkachenko N. Refining the Clinical Spectrum of the 17p13.3 Microduplication Syndrome: Case-Report of a Familial Small Microduplication. Biomedicines 2022; 10:biomedicines10123078. [PMID: 36551834 PMCID: PMC9775100 DOI: 10.3390/biomedicines10123078] [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: 11/07/2022] [Revised: 11/18/2022] [Accepted: 11/26/2022] [Indexed: 12/02/2022] Open
Abstract
The chromosomal region 17p13.3 contains extensive repetitive sequences and is a well-recognized region of genomic instability. The 17p13.3 microduplication syndrome has been associated with a clinical spectrum of moderately non-specific phenotypes, including global developmental delay/intellectual disability, behavioral disorders, autism spectrum disorder and variable dysmorphic features. Depending on the genes involved in the microduplication, it can be categorized in two subtypes with different phenotypes. Here, we report a case of a 7-year-old boy with global developmental delay, speech impairment, hypotonia, behavioral conditions (ADHD and ODD), non-specific dysmorphic features and overgrowth. Genetic testing revealed a small 17p13.3 chromosomal duplication, which included the BHLHA9, CRK and YWHAE genes. Additionally, we observed that this was maternally inherited, and that the mother presented with a milder phenotype including mild learning disabilities, speech impairment and non-specific dysmorphic features, which did not significantly affect her. In conclusion, we present a clinical case of a 17p13.3 duplication that further delineates the clinical spectrum of this syndrome, including its intrafamilial/intergenerational variability.
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Affiliation(s)
- Jorge Diogo Da Silva
- Centro de Genética Médica Doutor Jacinto Magalhães (CGM), Centro Hospitalar Universitário do Porto, 4050-106 Porto, Portugal
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal
- ICVS/3B’s—PT Government Associate Laboratory, 4806-909 Braga, Portugal
- Correspondence:
| | - Diana Gonzaga
- Centro de Genética Médica Doutor Jacinto Magalhães (CGM), Centro Hospitalar Universitário do Porto, 4050-106 Porto, Portugal
- Centro Materno-Infantil do Norte, Centro Hospital Universitário do Porto, 4099-001 Porto, Portugal
| | - Ana Barreta
- Medical Genetics Service, Joaquim Chaves Saúde, 2685-145 Oeiras, Portugal
| | - Hildeberto Correia
- Medical Genetics Service, Joaquim Chaves Saúde, 2685-145 Oeiras, Portugal
| | - Ana Maria Fortuna
- Centro de Genética Médica Doutor Jacinto Magalhães (CGM), Centro Hospitalar Universitário do Porto, 4050-106 Porto, Portugal
- Unit for Multidisciplinary Research in Biomedicine, Abel Salazar Biomedical Sciences Institute, Porto University, 4050-345 Porto, Portugal
| | - Ana Rita Soares
- Centro de Genética Médica Doutor Jacinto Magalhães (CGM), Centro Hospitalar Universitário do Porto, 4050-106 Porto, Portugal
- Unit for Multidisciplinary Research in Biomedicine, Abel Salazar Biomedical Sciences Institute, Porto University, 4050-345 Porto, Portugal
| | - Nataliya Tkachenko
- Centro de Genética Médica Doutor Jacinto Magalhães (CGM), Centro Hospitalar Universitário do Porto, 4050-106 Porto, Portugal
- Unit for Multidisciplinary Research in Biomedicine, Abel Salazar Biomedical Sciences Institute, Porto University, 4050-345 Porto, Portugal
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Kearney JA, Copeland-Hardin LD, Duarte S, Zachwieja NA, Eckart-Frank IK, Hawkins NA. Fine mapping and candidate gene analysis of a dravet syndrome modifier locus on mouse chromosome 11. Mamm Genome 2022; 33:565-574. [PMID: 35606653 DOI: 10.1007/s00335-022-09955-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/02/2022] [Indexed: 11/25/2022]
Abstract
Pathogenic variants in SCN1A result in a spectrum of phenotypes ranging from mild febrile seizures to Dravet syndrome, a severe infant-onset epileptic encephalopathy. Individuals with Dravet syndrome have developmental delays, elevated risk for sudden unexpected death in epilepsy (SUDEP), and have multiple seizure types that are often refractory to treatment. Although most Dravet syndrome variants arise de novo, there are cases where an SCN1A variant was inherited from mildly affected parents, as well as some individuals with de novo loss-of-function or truncation mutations that presented with milder phenotypes. This suggests that disease severity is influenced by other factors that modify expressivity of the primary mutation, which likely includes genetic modifiers. Consistent with this, the Scn1a+/- mouse model of Dravet syndrome exhibits strain-dependent variable phenotype severity. Scn1a+/- mice on the 129S6/SvEvTac (129) strain have no overt phenotype and a normal lifespan, while [C57BL/6Jx129]F1.Scn1a+/- mice have severe epilepsy with high rates of premature death. Low resolution genetic mapping identified several Dravet syndrome modifier (Dsm) loci responsible for the strain-dependent difference in survival of Scn1a+/- mice. To confirm the Dsm5 locus and refine its position, we generated interval-specific congenic strains carrying 129-derived chromosome 11 alleles on the C57BL/6J strain and localized Dsm5 to a 5.9 Mb minimal region. We then performed candidate gene analysis in the modifier region. Consideration of brain-expressed genes with expression or coding sequence differences between strains along with gene function suggested numerous strong candidates, including several protein coding genes and two miRNAs that may regulate Scn1a transcript.
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Affiliation(s)
- Jennifer A Kearney
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, 320 E. Superior St., Searle 8-510, Chicago, IL, 60611, USA.
| | - Letonia D Copeland-Hardin
- Driskill Graduate Program in Life Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Samantha Duarte
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, 320 E. Superior St., Searle 8-510, Chicago, IL, 60611, USA
| | - Nicole A Zachwieja
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, 320 E. Superior St., Searle 8-510, Chicago, IL, 60611, USA
| | - Isaiah K Eckart-Frank
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, 320 E. Superior St., Searle 8-510, Chicago, IL, 60611, USA
| | - Nicole A Hawkins
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, 320 E. Superior St., Searle 8-510, Chicago, IL, 60611, USA
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8
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Tolezano GC, da Costa SS, Scliar MDO, Fernandes WLM, Otto PA, Bertola DR, Rosenberg C, Vianna-Morgante AM, Krepischi ACV. Investigating Genetic Factors Contributing to Variable Expressivity of Class I 17p13.3 Microduplication. INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE 2021; 9:296-306. [PMID: 33688487 PMCID: PMC7936075 DOI: 10.22088/ijmcm.bums.9.4.296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/02/2021] [Indexed: 11/13/2022]
Abstract
17p13.3 microduplications are rare copy number variations (CNVs) associated with variable phenotypes, including facial dysmorphism, developmental delay, intellectual disability, and autism. Typically, when a recognized pathogenic CNV is identified, other genetic factors are not considered. We investigated via whole-exome sequencing the presence of additional variants in four carriers of class I 17p13.3 microduplications. A 730 kb 17p13.3 microduplication was identified in two half-brothers with intellectual disability, but not in a third affected half-brother or blood cells from their normal mother (Family A), thus leading to the hypothesis of maternal germline mosaicism. No additional pathogenic variants were detected in Family A. Two affected siblings carried maternally inherited 450 kb 17p13.3 microduplication (Family B); the three carriers of the microduplication exhibited microcephaly and learning disability/speech impairment of variable degrees. Exome analysis revealed a variant of uncertain significance in RORA, a gene already linked to autism, in the autistic boy; his sister was heterozygous for a CYP1B1 pathogenic variant that could be related to her congenital glaucoma. Besides, both siblings carried a loss-of-function variant in DIP2B, a candidate gene for intellectual disability, which was inherited from their father, who also exhibited learning disability in childhood. In conclusion, additional pathogenic variants were revealed in two affected carriers of class I 17p13.3 microduplication (Family B), probably adding to their phenotypes. These results provided new evidence regarding the contribution of RORA and DIP2B to neurocognitive deficits, and highlighted the importance of full genetic investigation in carriers of CNV syndromes with variable expressivity. Finally, we suggest that microcephaly may be a rare clinical feature also related to the presence of the class I 17p13.3 microduplication.
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Affiliation(s)
- Giovanna Cantini Tolezano
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Silvia Souza da Costa
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Marília de Oliveira Scliar
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | | | - Paulo Alberto Otto
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Débora Romeo Bertola
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil .,Instituto da Criança, Hospital das Clínicas, University of São Paulo Medical, São Paulo, SP, Brazil
| | - Carla Rosenberg
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Angela Maria Vianna-Morgante
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
| | - Ana Cristina Victorino Krepischi
- Human Genome and Stem-Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, Brazil
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9
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Sun D, Liu Y, Cai W, Ma J, Ni K, Chen M, Wang C, Liu Y, Zhu Y, Liu Z, Zhu F. Detection of Disease-Causing SNVs/Indels and CNVs in Single Test Based on Whole Exome Sequencing: A Retrospective Case Study in Epileptic Encephalopathies. Front Pediatr 2021; 9:635703. [PMID: 34055682 PMCID: PMC8155357 DOI: 10.3389/fped.2021.635703] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/24/2021] [Indexed: 12/14/2022] Open
Abstract
Background: Epileptic encephalopathies (EEs) are a pediatric entity with highly phenotypic and genetic heterogeneity. Both single nucleotide variants (SNVs)/Indels and copy number variations (CNVs) could be the causes. Whole exome sequencing (WES) is widely applied to detect SNVs/Indels, but the bioinformatics approach for detecting CNVs is still limited and weak. In the current study, the possibility of profiling both disease-causing SNVs/Indels and CNVs in a single test based on WES in EEs was evaluated. Methods: The infants diagnosed with EEs were enrolled from a single pediatric epilepsy center between January 2018 and February 2020. Demographic and clinical data were collected. In WES data, the pathogenic SNVs were identified through an in-house pipeline, and pathogenic CNVs were identified by CNVkit. The diagnostic rate was evaluated, and the molecular findings were characterized. Results: A total of 73 infants were included; 36 (49.32%) of them were males. The median age was 7 months. Thirty-two (43.84%) infants had been diagnosed with epilepsy syndrome. The most common type of syndrome was West syndrome (22/73, 30.1%), followed by Dravet syndrome (20/77, 27.4%). Fifty-four (73.97%) had intellectual development delay. The genetic cause of EEs, pathogenic or likely pathogenic variants, were successfully discovered in 46.6% (34/73) of the infants, and 29 (39.7%) infants carried SNVs/Indels, while 5 (6.8%) carried CNVs. The majority of the disease-causing variants were inherited in de novo pattern (25, 71.4%). In addition to showing that the variants in the ion channel encoding genes accounted for the main etiology, we discovered and confirmed two new disease-causing genes, CACNA1E and WDR26. Five discovered CNVs were deletions of 2q24.3, 1p36, 15q11-q13, 16p11.2, and 17p13.3, and all were confirmed by array comparative genomic hybridization. Conclusion: The application of both SNVs/Indels and CNVs detection in a single test based on WES yielded a high diagnosis rate in EEs. WES may serve as a first-tier test with cost-effective benefit in EEs.
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Affiliation(s)
- Dan Sun
- Department of Neurology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Liu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Cai
- Department of Hematology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiehui Ma
- Department of Neurology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kun Ni
- Department of Neurology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ming Chen
- Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Cheng Wang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yongchu Liu
- Aegicare Technology Co., Ltd. Shenzhen, China
| | | | - Zhisheng Liu
- Department of Neurology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Zhu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Forbes BE, Blyth AJ, Wit JM. Disorders of IGFs and IGF-1R signaling pathways. Mol Cell Endocrinol 2020; 518:111035. [PMID: 32941924 DOI: 10.1016/j.mce.2020.111035] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/02/2020] [Accepted: 09/11/2020] [Indexed: 12/12/2022]
Abstract
The insulin-like growth factor (IGF) system comprises two ligands, IGF-I and IGF-II, that regulate multiple physiological processes, including mammalian development, metabolism and growth, through the type 1 IGF receptor (IGF-1R). The growth hormone (GH)-IGF-I axis is the major regulator of longitudinal growth. IGF-II is expressed in many tissues, notably the placenta, to regulate human pre- and post-natal growth and development. This review provides a brief introduction to the IGF system and summarizes findings from reports arising from recent larger genomic sequencing studies of human genetic mutations in IGF1 and IGF2 and genes of proteins regulating IGF action, namely the IGF-1R, IGF-1R signaling pathway components and the IGF binding proteins (IGFBPs). A perspective on the effect of homozygous mutations on structure and function of the IGFs and IGF-1R is also given and this is related to the effects on growth.
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Affiliation(s)
- Briony E Forbes
- Discipline of Medical Biochemistry, Flinders Health and Medical Research Institute, Flinders University, Australia.
| | - Andrew J Blyth
- Discipline of Medical Biochemistry, Flinders Health and Medical Research Institute, Flinders University, Australia
| | - Jan M Wit
- Department of Pediatrics, Leiden University Medical Center, Leiden, Netherlands
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11
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Romano C, Ferranti S, Mencarelli MA, Longo I, Renieri A, Grosso S. 17p13.3 microdeletion including YWHAE and CRK genes: towards a clinical characterization. Neurol Sci 2020; 41:2259-2262. [PMID: 32323081 DOI: 10.1007/s10072-020-04424-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 04/13/2020] [Indexed: 11/25/2022]
Abstract
INTRODUCTION The short arm of chromosome 17 is characterized by a high density of low copy repeats, creating the opportunity for non-allelic homologous recombination to occur. Microdeletions of the 17p13.3 region are responsible for neuronal migration disorders including isolated lissencephaly sequence and Miller-Dieker syndrome. CASE REPORT We describe the case of a 4-year and 2-month-old female with peculiar somatic traits and neurodevelopmental delay. At the age of 6 months, she started to present with infantile spasms syndrome; therefore, we administered vigabatrin followed by two cycles of adrenocorticotropic hormone, with good response. The coexistence of epileptic activity, neuropsychological delay, brain imaging abnormalities, and peculiar somatic features oriented us towards the hypothesis of a genetic etiology that could explain her clinical picture. Array CGH identified a 730 Kb deletion in the p13.3 region of the short arm of chromosome 17 including eleven genes, among these are YWHAE and CRK. DISCUSSION Microdeletions of the 17p13.3 region involving only YWHAE and CRK, sparing PAFAH1B1, result in neurodevelopmental delay, growth retardation, craniofacial dysmorphisms, and mild structural brain abnormalities. Differently from the previously described patients carrying YWHAE and CRK deletions, the main complaint of our patient was represented by seizures. The absence of clear neuronal migration defects and mutations of the PAFAH1B1 gene in our patient underlines the central role of additional genes located in the 17p13.3 chromosomal region in the pathogenesis of epilepsy and helps to expand the phenotype of 17p13.3 microdeletion syndrome.
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Affiliation(s)
- Chiara Romano
- Dipartimento di Medicina Molecolare e dello Sviluppo, Universita' degli Studi di Siena, viale Bracci 16, 53100, Siena, Italy
| | - Silvia Ferranti
- Dipartimento di Medicina Molecolare e dello Sviluppo, Universita' degli Studi di Siena, viale Bracci 16, 53100, Siena, Italy.
| | | | - Ilaria Longo
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, viale Bracci 2, 53100, Siena, Italy
| | - Alessandra Renieri
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, viale Bracci 2, 53100, Siena, Italy
- Medical Genetics, University of Siena, viale Bracci 2, 53100, Siena, Italy
| | - Salvatore Grosso
- Dipartimento di Medicina Molecolare e dello Sviluppo, Universita' degli Studi di Siena, viale Bracci 16, 53100, Siena, Italy
- U.O.C. Pediatria, Azienda Ospedaliera Universitaria Senese, viale Bracci 16, 53100, Siena, Italy
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12
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Emrick LT, Rosenfeld JA, Lalani SR, Jain M, Desai NK, Larson A, Kripps K, Vanderver A, Taft RJ, Bluske K, Perry D, Nagakura H, Immken LL, Burrage LC, Bacino CA, Belmont JW, Network UD, Lee B. Microdeletions excluding YWHAE and PAFAH1B1 cause a unique leukoencephalopathy: further delineation of the 17p13.3 microdeletion spectrum. Genet Med 2019; 21:1652-1656. [PMID: 30568308 PMCID: PMC6586530 DOI: 10.1038/s41436-018-0358-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 10/30/2018] [Indexed: 01/18/2023] Open
Abstract
PURPOSE Brain malformations caused by 17p13.3 deletions include lissencephaly with deletions of the larger Miller-Dieker syndrome region or smaller deletions of only PAFAH1B1, white matter changes, and a distinct syndrome due to deletions including YWHAE and CRK but sparing PAFAH1B1. We sought to understand the significance of 17p13.3 deletions between the YWHAE/CRK and PAFAH1B1 loci. METHODS We analyzed the clinical features of six individuals from five families with 17p13.3 deletions between and not including YWHAE/CRK and PAFAH1B1 identified among individuals undergoing clinical chromosomal microarray testing or research genome sequencing. RESULTS Five individuals from four families had multifocal white matter lesions while a sixth had a normal magnetic resonance image. A combination of our individuals and a review of those in the literature with white matter changes and deletions in this chromosomal region narrows the overlapping region for this brain phenotype to ~345 kb, including 11 RefSeq genes, with RTN4RL1 haploinsufficiency as the best candidate for causing this phenotype. CONCLUSION While previous literature has hypothesized dysmorphic features and white matter changes related to YWHAE, our cohort contributes evidence to the presence of additional genetic changes within 17p13.3 required for proper brain development.
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Affiliation(s)
- Lisa T Emrick
- Department of Neurology, Baylor College of Medicine, Houston, TX, USA.
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA.
| | - Jill A Rosenfeld
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Seema R Lalani
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Baylor Genetics, Houston, TX, USA
| | - Mahim Jain
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Kennedy Krieger Institute, Baltimore, MD, USA
| | - Nilesh K Desai
- Department of Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Austin Larson
- Section of Genetics, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Kimberly Kripps
- Section of Genetics, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Adeline Vanderver
- Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | | | | | | | - Honey Nagakura
- Dell Children's Medical Center, Austin, TX, USA
- LabCorp, Austin, TX, USA
| | | | - Lindsay C Burrage
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Carlos A Bacino
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Baylor Genetics, Houston, TX, USA
| | - John W Belmont
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Illumina, Houston, TX, USA
| | | | - Brendan Lee
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX, USA
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13
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Array comparative genomic hybridization characterization of a 3.3-Mb 17p13.3-p13.2 deletion encompassing YWHAE, CRK, HIC1 and PAFAH1B1 in an 8-year-old girl with Miller-Dieker lissencephaly syndrome, congenital heart defects, growth restriction and developmental delay. Taiwan J Obstet Gynecol 2018; 57:765-768. [DOI: 10.1016/j.tjog.2018.08.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2018] [Indexed: 11/19/2022] Open
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14
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Shoukfeh O, Richards AB, Prouty LA, Hinrichsen J, Spencer WR, Langford MP. Case Report of Proliferative Peripheral Retinopathy in Two Familial Lissencephaly Infants with Miller-Dieker Syndrome. J Pediatr Genet 2018; 7:86-91. [PMID: 29707411 DOI: 10.1055/s-0037-1612638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 11/15/2017] [Indexed: 10/18/2022]
Abstract
A complete ophthalmic examination is not routinely performed on infants with Miller-Dieker syndrome (MDS, chromosome 17p13.3 microdeletion). The authors present the cases of four cousins with MDS who also carried a 16p13.3 microduplication (not associated with Rubinstein-Taybi syndrome). Retinopathy of prematurity-like proliferative peripheral retinopathy (PPR) was detected in two male first cousins, but was not detected in the female half-cousins. PPR in the first infant resolved by 4 months, but the second infant's PPR progressed, requiring photocoagulation followed by lens-sparing vitrectomy. While ocular abnormalities are more prevalent and severe in other lissencephalopathies, the PPR in these MDS infants underscores the sight-saving potential of performing an ophthalmologic exam with early molecular testing for all lissencephaly infants.
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Affiliation(s)
- Omar Shoukfeh
- Department of Ophthalmology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, United States
| | - Alan B Richards
- Department of Ophthalmology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, United States
| | - Leonard A Prouty
- Departments of Pathology and Pediatrics, Louisiana State University Health Sciences Center, Shreveport, Louisiana, United States
| | - John Hinrichsen
- Department of Ophthalmology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, United States
| | | | - Marlyn P Langford
- Department of Ophthalmology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, United States
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