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Chd8 autism

Omer Durak, Fan Gao, Yea Jin Kaeser-Woo, Richard Rueda, Anthony J Martorell, Alexi Nott, Carol Y Liu, L Ashley Watson, Li-Huei Tsai
De novo mutations in CHD8 are strongly associated with autism spectrum disorder, but the basic biology of CHD8 remains poorly understood. Here we report that Chd8 knockdown during cortical development results in defective neural progenitor proliferation and differentiation that ultimately manifests in abnormal neuronal morphology and behaviors in adult mice. Transcriptome analysis revealed that while Chd8 stimulates the transcription of cell cycle genes, it also precludes the induction of neural-specific genes by regulating the expression of PRC2 complex components...
October 3, 2016: Nature Neuroscience
Yuta Katayama, Masaaki Nishiyama, Hirotaka Shoji, Yasuyuki Ohkawa, Atsuki Kawamura, Tetsuya Sato, Mikita Suyama, Toru Takumi, Tsuyoshi Miyakawa, Keiichi I Nakayama
Autism spectrum disorder (ASD) comprises a range of neurodevelopmental disorders characterized by deficits in social interaction and communication as well as by restricted and repetitive behaviours. ASD has a strong genetic component with high heritability. Exome sequencing analysis has recently identified many de novo mutations in a variety of genes in individuals with ASD, with CHD8, a gene encoding a chromatin remodeller, being most frequently affected. Whether CHD8 mutations are causative for ASD and how they might establish ASD traits have remained unknown...
September 7, 2016: Nature
Elliot S Stolerman, Brooke Smith, Alka Chaubey, Julie R Jones
Autism spectrum disorders (ASDs) are a heterogeneous group of neurodevelopmental disorders that are highly heritable. De novo genomic alterations are considered an important cause of autism spectrum disorders. Recent research has shown that de novo loss-of-function mutations in the chromodomain helicase DNA-binding protein 8 (CHD8) gene are associated with an increased risk of ASD. We describe a single case of an intragenic deletion of exons 26-28 in the CHD8 gene in a patient with autism and global developmental delay...
April 2016: European Journal of Medical Genetics
Marta Smyk, Anna Poluha, Ilona Jaszczuk, Magdalena Bartnik, Joanna Bernaciak, Beata Nowakowska
Neurodevelopmental disorders have long been associated with chromosomal abnormalities, including microdeletions and microduplications. Submicroscopic 14q11.2 deletions involving the CHD8 and SUPT16H genes have been reported in patients with developmental delay (DD)/intellectual disability (ID) or autism spectrum disorders (ASDs) and/or macrocephaly. Recently, disruptive CHD8 mutations were described in patients with similar phenotypes further showing pivotal role of CHD8 gene in the pathogenesis of DD/ID or ASDs...
May 2016: American Journal of Medical Genetics. Part A
Nancy Merner, Baudouin Forgeot d'Arc, Scott C Bell, Gilles Maussion, Huashan Peng, Julie Gauthier, Liam Crapper, Fadi F Hamdan, Jacques L Michaud, Laurent Mottron, Guy A Rouleau, Carl Ernst
Mutations in chromodomain helicase DNA-binding domain 8 (CHD8) have been identified in independent genotyping studies of autism spectrum disorder. To better understand the phenotype associated with CHD8 mutations, we genotyped all CHD8 exons in carefully assessed cohorts of autism (n = 142), schizophrenia (SCZ; n = 143), and intellectual disability (ID; n = 94). We identified one frameshift mutation, seven non-synonymous variants, and six synonymous variants. The frameshift mutation, p.Asn2092Lysfs*2, which creates a premature stop codon leading to the loss of 212 amino acids of the protein, was from an autism case on whom we present multiple clinical assessments and pharmacological treatments spanning more than 10 years...
May 2016: American Journal of Medical Genetics. Part A
Jennifer R Shingleton, Michael T Hemann
Aberrant chromatin regulation is a frequent driver of leukemogenesis. Mutations in chromatin regulators often result in more stem-like cells that seed a bulk leukemic population. Inhibitors targeting these proteins represent an emerging class of therapeutics, and identifying further chromatin regulators that promote disease progression may result in additional drug targets. We identified the chromatin-modifying protein CHD8 as necessary for cell survival in a mouse model of BCR-Abl+ B-cell acute lymphoblastic leukemia...
2015: PloS One
Stephan J Sanders
Rapid progress in identifying the genes underlying autism spectrum disorder (ASD) has provided the substrate for a first wave of analyses into the underlying neurobiology. This review describes the consensus across these diverse analyses, highlighting two distinct sets of genes: 1) Genes that regulate chromatin and transcription, especially in cortical projection neurons and striatal medium spiny neurons during mid-fetal development; and 2) Genes involved in synapse development and function, especially during infancy and early childhood, and differentially expressed in the post mortem ASD brain...
August 2015: Current Opinion in Genetics & Development
Ping Wang, Mingyan Lin, Erika Pedrosa, Anastasia Hrabovsky, Zheng Zhang, Wenjun Guo, Herbert M Lachman, Deyou Zheng
BACKGROUND: Disruptive mutation in the CHD8 gene is one of the top genetic risk factors in autism spectrum disorders (ASDs). Previous analyses of genome-wide CHD8 occupancy and reduced expression of CHD8 by shRNA knockdown in committed neural cells showed that CHD8 regulates multiple cell processes critical for neural functions, and its targets are enriched with ASD-associated genes. METHODS: To further understand the molecular links between CHD8 functions and ASD, we have applied the CRISPR/Cas9 technology to knockout one copy of CHD8 in induced pluripotent stem cells (iPSCs) to better mimic the loss-of-function status that would exist in the developing human embryo prior to neuronal differentiation...
2015: Molecular Autism
B Wilkinson, N Grepo, B L Thompson, J Kim, K Wang, O V Evgrafov, W Lu, J A Knowles, D B Campbell
Chromodomain helicase DNA-binding protein 8 (CHD8) was identified as a leading autism spectrum disorder (ASD) candidate gene by whole-exome sequencing and subsequent targeted-sequencing studies. De novo loss-of-function mutations were identified in 12 individuals with ASD and zero controls, accounting for a highly significant association. Small interfering RNA-mediated knockdown of CHD8 in human neural progenitor cells followed by RNA sequencing revealed that CHD8 insufficiency results in altered expression of 1715  genes, including both protein-coding and noncoding RNAs...
2015: Translational Psychiatry
Niklas Krumm, Tychele N Turner, Carl Baker, Laura Vives, Kiana Mohajeri, Kali Witherspoon, Archana Raja, Bradley P Coe, Holly A Stessman, Zong-Xiao He, Suzanne M Leal, Raphael Bernier, Evan E Eichler
To assess the relative impact of inherited and de novo variants on autism risk, we generated a comprehensive set of exonic single-nucleotide variants (SNVs) and copy number variants (CNVs) from 2,377 families with autism. We find that private, inherited truncating SNVs in conserved genes are enriched in probands (odds ratio = 1.14, P = 0.0002) in comparison to unaffected siblings, an effect involving significant maternal transmission bias to sons. We also observe a bias for inherited CNVs, specifically for small (<100 kb), maternally inherited events (P = 0...
June 2015: Nature Genetics
Roger Higdon, Rachel K Earl, Larissa Stanberry, Caitlin M Hudac, Elizabeth Montague, Elizabeth Stewart, Imre Janko, John Choiniere, William Broomall, Natali Kolker, Raphael A Bernier, Eugene Kolker
Complex diseases are caused by a combination of genetic and environmental factors, creating a difficult challenge for diagnosis and defining subtypes. This review article describes how distinct disease subtypes can be identified through integration and analysis of clinical and multi-omics data. A broad shift toward molecular subtyping of disease using genetic and omics data has yielded successful results in cancer and other complex diseases. To determine molecular subtypes, patients are first classified by applying clustering methods to different types of omics data, then these results are integrated with clinical data to characterize distinct disease subtypes...
April 2015: Omics: a Journal of Integrative Biology
Justin Cotney, Rebecca A Muhle, Stephan J Sanders, Li Liu, A Jeremy Willsey, Wei Niu, Wenzhong Liu, Lambertus Klei, Jing Lei, Jun Yin, Steven K Reilly, Andrew T Tebbenkamp, Candace Bichsel, Mihovil Pletikos, Nenad Sestan, Kathryn Roeder, Matthew W State, Bernie Devlin, James P Noonan
Recent studies implicate chromatin modifiers in autism spectrum disorder (ASD) through the identification of recurrent de novo loss of function mutations in affected individuals. ASD risk genes are co-expressed in human midfetal cortex, suggesting that ASD risk genes converge in specific regulatory networks during neurodevelopment. To elucidate such networks, we identify genes targeted by CHD8, a chromodomain helicase strongly associated with ASD, in human midfetal brain, human neural stem cells (hNSCs) and embryonic mouse cortex...
2015: Nature Communications
Aarathi Sugathan, Marta Biagioli, Christelle Golzio, Serkan Erdin, Ian Blumenthal, Poornima Manavalan, Ashok Ragavendran, Harrison Brand, Diane Lucente, Judith Miles, Steven D Sheridan, Alexei Stortchevoi, Manolis Kellis, Stephen J Haggarty, Nicholas Katsanis, James F Gusella, Michael E Talkowski
Truncating mutations of chromodomain helicase DNA-binding protein 8 (CHD8), and of many other genes with diverse functions, are strong-effect risk factors for autism spectrum disorder (ASD), suggesting multiple mechanisms of pathogenesis. We explored the transcriptional networks that CHD8 regulates in neural progenitor cells (NPCs) by reducing its expression and then integrating transcriptome sequencing (RNA sequencing) with genome-wide CHD8 binding (ChIP sequencing). Suppressing CHD8 to levels comparable with the loss of a single allele caused altered expression of 1,756 genes, 64...
October 21, 2014: Proceedings of the National Academy of Sciences of the United States of America
Paolo Prontera, Valentina Ottaviani, Daniela Toccaceli, Daniela Rogaia, Carmen Ardisia, Rita Romani, Gabriela Stangoni, Angiolo Pierini, Emilio Donti
The most frequent causes of Intellectual Disability (ID)/Autism Spectrum Disorders (ASDs) are chromosomal abnormalities, genomic rearrangements and submicroscopic deletions coupled with duplications. We report here on an 11-year-old girl showing autism, macrocephaly, and facial dysmorphism, in which array-CGH showed a de novo microdeletion of ∼114 Kb in the 14q11.2 chromosomal region, involving the SUPT16H, CHD8, and RAB2B genes. Four patients with ID and/or ASD and/or macrocephaly with overlapping deletions have been previously described: three showed very large rearrangements (>1 Mb), while one had a microdeletion of ∼101 Kb, largely overlapping the one reported herein...
December 2014: American Journal of Medical Genetics. Part A
Xin-Xin Xiong, Miao He, Xiao-Qian Chen
Autism or autism spectrum disorders is the most common central nervous system developmental disorder in children. Until now, there is still no effective drug for autism. The latest breakthrough advance in autism study is the discovery of autism-related gene de novo mutation by the whole exon sequencing. Among multiple de novo gene mutations identified in autism, the chromodomain helicase DNA-binding protein 8 (CHD8) is the most frequently mutated gene, suggesting that CHD8 is an important candidate gene for autism...
June 2014: Sheng Li Ke Xue Jin Zhan [Progress in Physiology]
Raphael Bernier, Christelle Golzio, Bo Xiong, Holly A Stessman, Bradley P Coe, Osnat Penn, Kali Witherspoon, Jennifer Gerdts, Carl Baker, Anneke T Vulto-van Silfhout, Janneke H Schuurs-Hoeijmakers, Marco Fichera, Paolo Bosco, Serafino Buono, Antonino Alberti, Pinella Failla, Hilde Peeters, Jean Steyaert, Lisenka E L M Vissers, Ludmila Francescatto, Heather C Mefford, Jill A Rosenfeld, Trygve Bakken, Brian J O'Roak, Matthew Pawlus, Randall Moon, Jay Shendure, David G Amaral, Ed Lein, Julia Rankin, Corrado Romano, Bert B A de Vries, Nicholas Katsanis, Evan E Eichler
Autism spectrum disorder (ASD) is a heterogeneous disease in which efforts to define subtypes behaviorally have met with limited success. Hypothesizing that genetically based subtype identification may prove more productive, we resequenced the ASD-associated gene CHD8 in 3,730 children with developmental delay or ASD. We identified a total of 15 independent mutations; no truncating events were identified in 8,792 controls, including 2,289 unaffected siblings. In addition to a high likelihood of an ASD diagnosis among patients bearing CHD8 mutations, characteristics enriched in this group included macrocephaly, distinct faces, and gastrointestinal complaints...
July 17, 2014: Cell
Ian Blumenthal, Ashok Ragavendran, Serkan Erdin, Lambertus Klei, Aarathi Sugathan, Jolene R Guide, Poornima Manavalan, Julian Q Zhou, Vanessa C Wheeler, Joshua Z Levin, Carl Ernst, Kathryn Roeder, Bernie Devlin, James F Gusella, Michael E Talkowski
Reciprocal copy-number variation (CNV) of a 593 kb region of 16p11.2 is a common genetic cause of autism spectrum disorder (ASD), yet it is not completely penetrant and can manifest in a wide array of phenotypes. To explore its molecular consequences, we performed RNA sequencing of cerebral cortex from mouse models with CNV of the syntenic 7qF3 region and lymphoblast lines from 34 members of 7 multiplex ASD-affected families harboring the 16p11.2 CNV. Expression of all genes in the CNV region correlated well with their DNA copy number, with no evidence of dosage compensation...
June 5, 2014: American Journal of Human Genetics
S E McCarthy, J Gillis, M Kramer, J Lihm, S Yoon, Y Berstein, M Mistry, P Pavlidis, R Solomon, E Ghiban, E Antoniou, E Kelleher, C O'Brien, G Donohoe, M Gill, D W Morris, W R McCombie, A Corvin
Schizophrenia is a serious psychiatric disorder with a broadly undiscovered genetic etiology. Recent studies of de novo mutations (DNMs) in schizophrenia and autism have reinforced the hypothesis that rare genetic variation contributes to risk. We carried out exome sequencing on 57 trios with sporadic or familial schizophrenia. In sporadic trios, we observed a ~3.5-fold increase in the proportion of nonsense DNMs (0.101 vs 0.031, empirical P=0.01, Benjamini-Hochberg-corrected P=0.044). These mutations were significantly more likely to occur in genes with highly ranked probabilities of haploinsufficiency (P=0...
June 2014: Molecular Psychiatry
Niklas Krumm, Brian J O'Roak, Jay Shendure, Evan E Eichler
Autism spectrum disorder (ASD) and intellectual disability (ID) are neurodevelopmental disorders with large genetic components, but identification of pathogenic genes has proceeded slowly because hundreds of loci are involved. New exome sequencing technology has identified novel rare variants and has found that sporadic cases of ASD/ID are enriched for disruptive de novo mutations. Targeted large-scale resequencing studies have confirmed the significance of specific loci, including chromodomain helicase DNA binding protein 8 (CHD8), sodium channel, voltage-gated, type II, alpha subunit (SCN2A), dual specificity tyrosine-phosphorylation-regulated kinase 1A (DYRK1A), and catenin (cadherin-associated protein), beta 1, 88 kDa (CTNNB1, beta-catenin)...
February 2014: Trends in Neurosciences
Gaetano Terrone, Gerarda Cappuccio, Rita Genesio, Annalisa Esposito, Valeria Fiorentino, Marina Riccitelli, Lucio Nitsch, Nicola Brunetti-Pierri, Ennio Del Giudice
We report on a 21-year old woman with intellectual disability, autistic features, severe obesity, and facial dysmorphisms suggestive of Wolf-Hirschhorn syndrome (WHS). Array-CGH analysis showed a 2.89 Mb deletion on chromosome 14q11.2 containing 47 known genes. The most interesting genes included in this deletion are CHD8, a chromodomain helicase DNA binding protein that is associated with autism spectrum disorders, and MMP14, a matrix metalloproteinase that has been linked to obesity and type 2 diabetes. This report shows that 14q11...
January 2014: American Journal of Medical Genetics. Part A
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