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Use of clinical chromosomal microarray in Chinese patients with autism spectrum disorder-implications of a copy number variation involving DPP10 / A. S. L. MAK in Molecular Autism, 8 (2017)
[article]
Titre : Use of clinical chromosomal microarray in Chinese patients with autism spectrum disorder-implications of a copy number variation involving DPP10 Type de document : Texte imprimé et/ou numérique Auteurs : A. S. L. MAK, Auteur ; A. T. G. CHIU, Auteur ; G. K. C. LEUNG, Auteur ; C. C. Y. MAK, Auteur ; Y. W. Y. CHU, Auteur ; G. T. K. MOK, Auteur ; W. F. TANG, Auteur ; K. Y. K. CHAN, Auteur ; M. H. Y. TANG, Auteur ; E. T. LAU YIM, Auteur ; K. W. SO, Auteur ; V. Q. TAO, Auteur ; C. W. FUNG, Auteur ; Virginia C.N. WONG, Auteur ; M. UDDIN, Auteur ; S. L. LEE, Auteur ; C. R. MARSHALL, Auteur ; Stephen SCHERER, Auteur ; A. S. Y. KAN, Auteur ; B. H. Y. CHUNG, Auteur Article en page(s) : 31p. Langues : Anglais (eng) Mots-clés : Array comparative genomic hybridization (aCGH) Autism spectrum disorder (ASD) Chinese Copy number variations (CNVs) Dpp10 Index. décimale : PER Périodiques Résumé : BACKGROUND: Array comparative genomic hybridization (aCGH) is recommended as a first-tier genetic test for children with autism spectrum disorder (ASD). However, interpretation of results can often be challenging partly due to the fact that copy number variants (CNVs) in non-European ASD patients are not well studied. To address this literature gap, we report the CNV findings in a cohort of Chinese children with ASD. METHODS: DNA samples were obtained from 258 Chinese ASD patients recruited from a child assessment center between January 2011 and August 2014. aCGH was performed using NimbleGen-CGX-135k or Agilent-CGX 60k oligonucleotide array. Results were classified based on existing guidelines and literature. RESULTS: Ten pathogenic CNVs and one likely pathogenic CNV were found in nine patients, with an overall diagnostic yield of 3.5%. A 138 kb duplication involving 3' exons of DPP10 (arr[GRCh37] 2q14.1(116534689_116672358)x3), reported to be associated with ASD, was identified in one patient (0.39%). The same CNV was reported as variant of uncertain significance (VUS) in DECIPHER database. Multiple individuals of typical development carrying a similar duplication were identified among our ancestry-matched control with a frequency of 6/653 (0.92%) as well as from literature and genomic databases. CONCLUSIONS: The DPP10 duplication is likely a benign CNV polymorphism enriched in Southern Chinese with a population frequency of ~1%. This highlights the importance of using ancestry-matched controls in interpretation of aCGH findings. En ligne : http://dx.doi.org/10.1186/s13229-017-0136-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330
in Molecular Autism > 8 (2017) . - 31p.[article] Use of clinical chromosomal microarray in Chinese patients with autism spectrum disorder-implications of a copy number variation involving DPP10 [Texte imprimé et/ou numérique] / A. S. L. MAK, Auteur ; A. T. G. CHIU, Auteur ; G. K. C. LEUNG, Auteur ; C. C. Y. MAK, Auteur ; Y. W. Y. CHU, Auteur ; G. T. K. MOK, Auteur ; W. F. TANG, Auteur ; K. Y. K. CHAN, Auteur ; M. H. Y. TANG, Auteur ; E. T. LAU YIM, Auteur ; K. W. SO, Auteur ; V. Q. TAO, Auteur ; C. W. FUNG, Auteur ; Virginia C.N. WONG, Auteur ; M. UDDIN, Auteur ; S. L. LEE, Auteur ; C. R. MARSHALL, Auteur ; Stephen SCHERER, Auteur ; A. S. Y. KAN, Auteur ; B. H. Y. CHUNG, Auteur . - 31p.
Langues : Anglais (eng)
in Molecular Autism > 8 (2017) . - 31p.
Mots-clés : Array comparative genomic hybridization (aCGH) Autism spectrum disorder (ASD) Chinese Copy number variations (CNVs) Dpp10 Index. décimale : PER Périodiques Résumé : BACKGROUND: Array comparative genomic hybridization (aCGH) is recommended as a first-tier genetic test for children with autism spectrum disorder (ASD). However, interpretation of results can often be challenging partly due to the fact that copy number variants (CNVs) in non-European ASD patients are not well studied. To address this literature gap, we report the CNV findings in a cohort of Chinese children with ASD. METHODS: DNA samples were obtained from 258 Chinese ASD patients recruited from a child assessment center between January 2011 and August 2014. aCGH was performed using NimbleGen-CGX-135k or Agilent-CGX 60k oligonucleotide array. Results were classified based on existing guidelines and literature. RESULTS: Ten pathogenic CNVs and one likely pathogenic CNV were found in nine patients, with an overall diagnostic yield of 3.5%. A 138 kb duplication involving 3' exons of DPP10 (arr[GRCh37] 2q14.1(116534689_116672358)x3), reported to be associated with ASD, was identified in one patient (0.39%). The same CNV was reported as variant of uncertain significance (VUS) in DECIPHER database. Multiple individuals of typical development carrying a similar duplication were identified among our ancestry-matched control with a frequency of 6/653 (0.92%) as well as from literature and genomic databases. CONCLUSIONS: The DPP10 duplication is likely a benign CNV polymorphism enriched in Southern Chinese with a population frequency of ~1%. This highlights the importance of using ancestry-matched controls in interpretation of aCGH findings. En ligne : http://dx.doi.org/10.1186/s13229-017-0136-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330 Diagnostic and Therapeutic Misconception: Parental Expectations and Perspectives Regarding Genetic Testing for Developmental Disorders / I. TREMBLAY in Journal of Autism and Developmental Disorders, 49-1 (January 2019)
[article]
Titre : Diagnostic and Therapeutic Misconception: Parental Expectations and Perspectives Regarding Genetic Testing for Developmental Disorders Type de document : Texte imprimé et/ou numérique Auteurs : I. TREMBLAY, Auteur ; S. GRONDIN, Auteur ; A. M. LABERGE, Auteur ; D. COUSINEAU, Auteur ; L. CARMANT, Auteur ; A. ROWAN, Auteur ; A. JANVIER, Auteur Article en page(s) : p.363-375 Langues : Anglais (eng) Mots-clés : Array comparative genomic hybridization (aCGH) Autism spectrum disorder Chromosomal microarray (CMA) testing Genetic testing Global developmental delay Misconception Index. décimale : PER Périodiques Résumé : Parents' understanding/expectations regarding genetic testing for children with developmental disorders were explored. Within a month of testing, interviews were conducted with 57 parents. Many (74%) could not recall the nature of testing. Parents expected genetic testing to have positive impacts for the child (93%) and the family (98%), mainly to find the etiology and/or an intervention. Many parents (40%) reported not knowing their child's clinical diagnosis. They expected genetic testing would establish the diagnosis. Parents anticipated potential negative impacts of testing for children (78%) and families (87%), mainly finding another illness or not finding potential interventions. Abnormal results explaining the disorder were found in 9% of children. In summary, genetic results for developmental disorders are unlikely to meet parental expectations. En ligne : http://dx.doi.org/10.1007/s10803-018-3768-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=377
in Journal of Autism and Developmental Disorders > 49-1 (January 2019) . - p.363-375[article] Diagnostic and Therapeutic Misconception: Parental Expectations and Perspectives Regarding Genetic Testing for Developmental Disorders [Texte imprimé et/ou numérique] / I. TREMBLAY, Auteur ; S. GRONDIN, Auteur ; A. M. LABERGE, Auteur ; D. COUSINEAU, Auteur ; L. CARMANT, Auteur ; A. ROWAN, Auteur ; A. JANVIER, Auteur . - p.363-375.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 49-1 (January 2019) . - p.363-375
Mots-clés : Array comparative genomic hybridization (aCGH) Autism spectrum disorder Chromosomal microarray (CMA) testing Genetic testing Global developmental delay Misconception Index. décimale : PER Périodiques Résumé : Parents' understanding/expectations regarding genetic testing for children with developmental disorders were explored. Within a month of testing, interviews were conducted with 57 parents. Many (74%) could not recall the nature of testing. Parents expected genetic testing to have positive impacts for the child (93%) and the family (98%), mainly to find the etiology and/or an intervention. Many parents (40%) reported not knowing their child's clinical diagnosis. They expected genetic testing would establish the diagnosis. Parents anticipated potential negative impacts of testing for children (78%) and families (87%), mainly finding another illness or not finding potential interventions. Abnormal results explaining the disorder were found in 9% of children. In summary, genetic results for developmental disorders are unlikely to meet parental expectations. En ligne : http://dx.doi.org/10.1007/s10803-018-3768-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=377