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Identification of autism-related MECP2 mutations by whole-exome sequencing and functional validation / Z. WEN in Molecular Autism, 8 (2017)
[article]
Titre : Identification of autism-related MECP2 mutations by whole-exome sequencing and functional validation Type de document : Texte imprimé et/ou numérique Auteurs : Z. WEN, Auteur ; T. L. CHENG, Auteur ; G. Z. LI, Auteur ; S. B. SUN, Auteur ; S. Y. YU, Auteur ; Y. ZHANG, Auteur ; Y. S. DU, Auteur ; Z. QIU, Auteur Article en page(s) : 43p. Langues : Anglais (eng) Mots-clés : Autism spectrum disorder Methyl-CpG-binding protein-2 (MeCP2) Neural development Whole-exome sequencing Index. décimale : PER Périodiques Résumé : BACKGROUND: Methyl-CpG-binding protein-2 (MeCP2) is a critical regulator for neural development. Either loss- or gain-of-function leads to severe neurodevelopmental disorders, such as Rett syndrome (RTT) and autism spectrum disorder (ASD). We set out to screen for MECP2 mutations in patients of ASD and determine whether these autism-related mutations may compromise the proper function of MeCP2. METHODS: Whole-exome sequencing was performed to screen MECP2 and other ASD candidate genes for 120 patients diagnosed with ASD. The parents of patients who were identified with MECP2 mutation were selected for further Sanger sequencing. Each patient accomplished the case report form including general information and clinical scales applied to assess their clinical features. Mouse cortical neurons and HEK-293 cells were cultured and transfected with MeCP2 wild-type (WT) or mutant to examine the function of autism-associated MeCP2 mutants. HEK-293 cells were used to examine the expression of MeCP2 mutant constructs with Western blot. Mouse cortical neurons were used to analyze neurites and axon outgrowth by immunofluorescence experiments. RESULTS: We identified three missense mutations of MECP2 from three autism patients by whole-exome sequencing: p.P152L (c.455C>T), p.P376S (c.1162C>T), and p.R294X (c.880C>T). Among these mutations, p.P152L and p.R294X were de novo mutations, whereas p.P376S was inherited maternally. The diagnosis of RTT was excluded in all three autism patients. Abnormalities of dendritic and axonal growth were found after autism-related MeCP2 mutants were expressed in mouse cortical neurons; suggesting that autism-related MECP2 mutations impair the proper development of neurons. CONCLUSIONS: Our study identified genetic mutations of the MECP2 gene in autism patients, which were previously considered to be associated primarily with RTT. This finding suggests that loss-of-function mutations of MECP2 may also lead to autism spectrum disorders. En ligne : http://dx.doi.org/10.1186/s13229-017-0157-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=331
in Molecular Autism > 8 (2017) . - 43p.[article] Identification of autism-related MECP2 mutations by whole-exome sequencing and functional validation [Texte imprimé et/ou numérique] / Z. WEN, Auteur ; T. L. CHENG, Auteur ; G. Z. LI, Auteur ; S. B. SUN, Auteur ; S. Y. YU, Auteur ; Y. ZHANG, Auteur ; Y. S. DU, Auteur ; Z. QIU, Auteur . - 43p.
Langues : Anglais (eng)
in Molecular Autism > 8 (2017) . - 43p.
Mots-clés : Autism spectrum disorder Methyl-CpG-binding protein-2 (MeCP2) Neural development Whole-exome sequencing Index. décimale : PER Périodiques Résumé : BACKGROUND: Methyl-CpG-binding protein-2 (MeCP2) is a critical regulator for neural development. Either loss- or gain-of-function leads to severe neurodevelopmental disorders, such as Rett syndrome (RTT) and autism spectrum disorder (ASD). We set out to screen for MECP2 mutations in patients of ASD and determine whether these autism-related mutations may compromise the proper function of MeCP2. METHODS: Whole-exome sequencing was performed to screen MECP2 and other ASD candidate genes for 120 patients diagnosed with ASD. The parents of patients who were identified with MECP2 mutation were selected for further Sanger sequencing. Each patient accomplished the case report form including general information and clinical scales applied to assess their clinical features. Mouse cortical neurons and HEK-293 cells were cultured and transfected with MeCP2 wild-type (WT) or mutant to examine the function of autism-associated MeCP2 mutants. HEK-293 cells were used to examine the expression of MeCP2 mutant constructs with Western blot. Mouse cortical neurons were used to analyze neurites and axon outgrowth by immunofluorescence experiments. RESULTS: We identified three missense mutations of MECP2 from three autism patients by whole-exome sequencing: p.P152L (c.455C>T), p.P376S (c.1162C>T), and p.R294X (c.880C>T). Among these mutations, p.P152L and p.R294X were de novo mutations, whereas p.P376S was inherited maternally. The diagnosis of RTT was excluded in all three autism patients. Abnormalities of dendritic and axonal growth were found after autism-related MeCP2 mutants were expressed in mouse cortical neurons; suggesting that autism-related MECP2 mutations impair the proper development of neurons. CONCLUSIONS: Our study identified genetic mutations of the MECP2 gene in autism patients, which were previously considered to be associated primarily with RTT. This finding suggests that loss-of-function mutations of MECP2 may also lead to autism spectrum disorders. En ligne : http://dx.doi.org/10.1186/s13229-017-0157-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=331 Comprehensive Genetic Analysis of Non-syndromic Autism Spectrum Disorder in Clinical Settings / K. OHASHI in Journal of Autism and Developmental Disorders, 51-12 (December 2021)
[article]
Titre : Comprehensive Genetic Analysis of Non-syndromic Autism Spectrum Disorder in Clinical Settings Type de document : Texte imprimé et/ou numérique Auteurs : K. OHASHI, Auteur ; S. FUKUHARA, Auteur ; T. MIYACHI, Auteur ; T. ASAI, Auteur ; M. IMAEDA, Auteur ; M. GOTO, Auteur ; Y. KUROKAWA, Auteur ; T. ANZAI, Auteur ; Y. TSURUSAKI, Auteur ; N. MIYAKE, Auteur ; N. MATSUMOTO, Auteur ; T. YAMAGATA, Auteur ; S. SAITOH, Auteur Article en page(s) : p.4655-4662 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/diagnosis/genetics Comparative Genomic Hybridization DNA Copy Number Variations Genetic Predisposition to Disease Genetic Testing Genomics Humans Autism spectrum disorder Genetic analysis Microarray comparative genomic hybridization Whole-exome sequencing Index. décimale : PER Périodiques Résumé : Although genetic factors are involved in the etiology of autism spectrum disorder (ASD), the significance of genetic analysis in clinical settings is unclear. Forty-nine subjects diagnosed with non-syndromic ASD were analyzed by microarray comparative genomic hybridization (CGH) analysis, whole-exome sequencing (WES) analysis, and panel sequencing analysis for 52 common causative genes of ASD to detect inherited rare variants. Genetic analysis by microarray CGH and WES analyses showed conclusive results in about 10% of patients, however, many inherited variants detected by panel sequencing analysis were difficult to interpret and apply in clinical practice in the majority of patients. Further improvement of interpretation of many variants detected would be necessary for combined genetic tests to be used in clinical settings. En ligne : http://dx.doi.org/10.1007/s10803-021-04910-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=454
in Journal of Autism and Developmental Disorders > 51-12 (December 2021) . - p.4655-4662[article] Comprehensive Genetic Analysis of Non-syndromic Autism Spectrum Disorder in Clinical Settings [Texte imprimé et/ou numérique] / K. OHASHI, Auteur ; S. FUKUHARA, Auteur ; T. MIYACHI, Auteur ; T. ASAI, Auteur ; M. IMAEDA, Auteur ; M. GOTO, Auteur ; Y. KUROKAWA, Auteur ; T. ANZAI, Auteur ; Y. TSURUSAKI, Auteur ; N. MIYAKE, Auteur ; N. MATSUMOTO, Auteur ; T. YAMAGATA, Auteur ; S. SAITOH, Auteur . - p.4655-4662.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 51-12 (December 2021) . - p.4655-4662
Mots-clés : Autism Spectrum Disorder/diagnosis/genetics Comparative Genomic Hybridization DNA Copy Number Variations Genetic Predisposition to Disease Genetic Testing Genomics Humans Autism spectrum disorder Genetic analysis Microarray comparative genomic hybridization Whole-exome sequencing Index. décimale : PER Périodiques Résumé : Although genetic factors are involved in the etiology of autism spectrum disorder (ASD), the significance of genetic analysis in clinical settings is unclear. Forty-nine subjects diagnosed with non-syndromic ASD were analyzed by microarray comparative genomic hybridization (CGH) analysis, whole-exome sequencing (WES) analysis, and panel sequencing analysis for 52 common causative genes of ASD to detect inherited rare variants. Genetic analysis by microarray CGH and WES analyses showed conclusive results in about 10% of patients, however, many inherited variants detected by panel sequencing analysis were difficult to interpret and apply in clinical practice in the majority of patients. Further improvement of interpretation of many variants detected would be necessary for combined genetic tests to be used in clinical settings. En ligne : http://dx.doi.org/10.1007/s10803-021-04910-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=454 Uncovering obsessive-compulsive disorder risk genes in a pediatric cohort by high-resolution analysis of copy number variation / M. J. GAZZELLONE in Journal of Neurodevelopmental Disorders, 8-1 (December 2016)
[article]
Titre : Uncovering obsessive-compulsive disorder risk genes in a pediatric cohort by high-resolution analysis of copy number variation Type de document : Texte imprimé et/ou numérique Auteurs : M. J. GAZZELLONE, Auteur ; M. ZARREI, Auteur ; C. L. BURTON, Auteur ; S. WALKER, Auteur ; M. UDDIN, Auteur ; S. M. SHAHEEN, Auteur ; J. COSTE, Auteur ; R. RAJENDRAM, Auteur ; R. J. SCHACHTER, Auteur ; M. COLASANTO, Auteur ; G. L. HANNA, Auteur ; D. R. ROSENBERG, Auteur ; N. SORENI, Auteur ; K. D. FITZGERALD, Auteur ; C. R. MARSHALL, Auteur ; J. A. BUCHANAN, Auteur ; D. MERICO, Auteur ; P. D. ARNOLD, Auteur ; Stephen SCHERER, Auteur Article en page(s) : p.36 Langues : Anglais (eng) Mots-clés : Copy number variation Obsessive-compulsive disorder Pediatrics Whole-exome sequencing Index. décimale : PER Périodiques Résumé : BACKGROUND: Obsessive-compulsive disorder (OCD) is a heterogeneous neuropsychiatric condition, thought to have a significant genetic component. When onset occurs in childhood, affected individuals generally exhibit different characteristics from adult-onset OCD, including higher prevalence in males and increased heritability. Since neuropsychiatric conditions are associated with copy number variations (CNVs), we considered their potential role in the etiology of OCD. METHODS: We genotyped 307 unrelated pediatric probands with idiopathic OCD (including 174 that were part of complete parent-child trios) and compared their genotypes with those of 3861 population controls, to identify rare CNVs (<0.5 % frequency) of at least 15 kb in size that might contribute to OCD. RESULTS: We uncovered de novo CNVs in 4/174 probands (2.3 %). Our case cohort was enriched for CNVs in genes that encode targets of the fragile X mental retardation protein (nominal p = 1.85 x 10(-03); FDR=0.09), similar to previous findings in autism and schizophrenia. These results also identified deletions or duplications of exons in genes involved in neuronal migration (ASTN2), synapse formation (NLGN1 and PTPRD), and postsynaptic scaffolding (DLGAP1 and DLGAP2), which may be relevant to the pathogenesis of OCD. Four cases had CNVs involving known genomic disorder loci (1q21.1-21.2, 15q11.2-q13.1, 16p13.11, and 17p12). Further, we identified BTBD9 as a candidate gene for OCD. We also sequenced exomes of ten "CNV positive" trios and identified in one an additional plausibly relevant mutation: a 13 bp exonic deletion in DRD4. CONCLUSIONS: Our findings suggest that rare CNVs may contribute to the etiology of OCD. En ligne : http://dx.doi.org/10.1186/s11689-016-9170-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=349
in Journal of Neurodevelopmental Disorders > 8-1 (December 2016) . - p.36[article] Uncovering obsessive-compulsive disorder risk genes in a pediatric cohort by high-resolution analysis of copy number variation [Texte imprimé et/ou numérique] / M. J. GAZZELLONE, Auteur ; M. ZARREI, Auteur ; C. L. BURTON, Auteur ; S. WALKER, Auteur ; M. UDDIN, Auteur ; S. M. SHAHEEN, Auteur ; J. COSTE, Auteur ; R. RAJENDRAM, Auteur ; R. J. SCHACHTER, Auteur ; M. COLASANTO, Auteur ; G. L. HANNA, Auteur ; D. R. ROSENBERG, Auteur ; N. SORENI, Auteur ; K. D. FITZGERALD, Auteur ; C. R. MARSHALL, Auteur ; J. A. BUCHANAN, Auteur ; D. MERICO, Auteur ; P. D. ARNOLD, Auteur ; Stephen SCHERER, Auteur . - p.36.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 8-1 (December 2016) . - p.36
Mots-clés : Copy number variation Obsessive-compulsive disorder Pediatrics Whole-exome sequencing Index. décimale : PER Périodiques Résumé : BACKGROUND: Obsessive-compulsive disorder (OCD) is a heterogeneous neuropsychiatric condition, thought to have a significant genetic component. When onset occurs in childhood, affected individuals generally exhibit different characteristics from adult-onset OCD, including higher prevalence in males and increased heritability. Since neuropsychiatric conditions are associated with copy number variations (CNVs), we considered their potential role in the etiology of OCD. METHODS: We genotyped 307 unrelated pediatric probands with idiopathic OCD (including 174 that were part of complete parent-child trios) and compared their genotypes with those of 3861 population controls, to identify rare CNVs (<0.5 % frequency) of at least 15 kb in size that might contribute to OCD. RESULTS: We uncovered de novo CNVs in 4/174 probands (2.3 %). Our case cohort was enriched for CNVs in genes that encode targets of the fragile X mental retardation protein (nominal p = 1.85 x 10(-03); FDR=0.09), similar to previous findings in autism and schizophrenia. These results also identified deletions or duplications of exons in genes involved in neuronal migration (ASTN2), synapse formation (NLGN1 and PTPRD), and postsynaptic scaffolding (DLGAP1 and DLGAP2), which may be relevant to the pathogenesis of OCD. Four cases had CNVs involving known genomic disorder loci (1q21.1-21.2, 15q11.2-q13.1, 16p13.11, and 17p12). Further, we identified BTBD9 as a candidate gene for OCD. We also sequenced exomes of ten "CNV positive" trios and identified in one an additional plausibly relevant mutation: a 13 bp exonic deletion in DRD4. CONCLUSIONS: Our findings suggest that rare CNVs may contribute to the etiology of OCD. En ligne : http://dx.doi.org/10.1186/s11689-016-9170-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=349