11 recherche sur le mot-clé 'OCD'

Correlates of insight among youth with obsessive-compulsive disorder / Adam B. LEWIN in Journal of Child Psychology and Psychiatry, 51-5 (May 2010)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 51-5 (May 2010) . - p.603-611 Titre : Correlates of insight among youth with obsessive-compulsive disorder Type de document : texte imprimé Auteurs : Adam B. LEWIN, Auteur ; John PIACENTINI, Auteur ; Tara S. PERIS, Auteur ; R. Lindsey BERGMAN, Auteur ; Susanna CHANG, Auteur ; James T. MCCRACKEN, Auteur Année de publication : 2010 Article en page(s) : p.603-611 Langues : Anglais (eng) Mots-clés : OCD obsessive-compulsive-disorder insight child Index. décimale : PER Périodiques Résumé : Background: Individuals with Obsessive-Compulsive Disorder (OCD) may lack insight into the irrational nature of their symptoms. Among adults with OCD, poor insight has been linked to greater symptom severity, increased likelihood of comorbid symptoms, lower adaptive functioning, and worse treatment outcomes. Parallel work regarding insight among children and adolescents, with OCD, is lacking. The aim of this research was to examine links between insight and demographic, cognitive, and clinical factors among youth with OCD. Methods: Seventy-one youths with OCD (mean age = 11.7; 63% = male) were assessed as part of a larger treatment trial. Insight was measured via clinician interview. Results: Youth with low insight had poorer intellectual functioning and reported decreased perception of control over their environment. Additionally, youth with low insight were more likely to be younger, to report higher levels of depressive symptoms, and to report lower levels of adaptive functioning. Conclusion: This set of cognitive, developmental and clinical factors that may predispose youth with OCD to have diminished insight. Data provide initial empirical support for diagnostic differences between youth and adults with regard to requiring intact insight. Implications for treatment are discussed. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2009.02181.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=101 [article] Correlates of insight among youth with obsessive-compulsive disorder [texte imprimé] / Adam B. LEWIN, Auteur ; John PIACENTINI, Auteur ; Tara S. PERIS, Auteur ; R. Lindsey BERGMAN, Auteur ; Susanna CHANG, Auteur ; James T. MCCRACKEN, Auteur . - 2010 . - p.603-611. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 51-5 (May 2010) . - p.603-611 Mots-clés : OCD obsessive-compulsive-disorder insight child Index. décimale : PER Périodiques Résumé : Background: Individuals with Obsessive-Compulsive Disorder (OCD) may lack insight into the irrational nature of their symptoms. Among adults with OCD, poor insight has been linked to greater symptom severity, increased likelihood of comorbid symptoms, lower adaptive functioning, and worse treatment outcomes. Parallel work regarding insight among children and adolescents, with OCD, is lacking. The aim of this research was to examine links between insight and demographic, cognitive, and clinical factors among youth with OCD. Methods: Seventy-one youths with OCD (mean age = 11.7; 63% = male) were assessed as part of a larger treatment trial. Insight was measured via clinician interview. Results: Youth with low insight had poorer intellectual functioning and reported decreased perception of control over their environment. Additionally, youth with low insight were more likely to be younger, to report higher levels of depressive symptoms, and to report lower levels of adaptive functioning. Conclusion: This set of cognitive, developmental and clinical factors that may predispose youth with OCD to have diminished insight. Data provide initial empirical support for diagnostic differences between youth and adults with regard to requiring intact insight. Implications for treatment are discussed. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2009.02181.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=101

DNA Methylation of the Oxytocin Receptor Across Neurodevelopmental Disorders / Michelle T. SIU in Journal of Autism and Developmental Disorders, 51-10 (October 2021)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 51-10 (October 2021) . - p.3610-3623 Titre : DNA Methylation of the Oxytocin Receptor Across Neurodevelopmental Disorders Type de document : texte imprimé Auteurs : Michelle T. SIU, Auteur ; Sabrina J. GOODMAN, Auteur ; Isaac YELLAN, Auteur ; Darci T. BUTCHER, Auteur ; Maryam JANGJOO, Auteur ; Daria GRAFODATSKAYA, Auteur ; Rageen RAJENDRAM, Auteur ; Youliang LOU, Auteur ; Rujun ZHANG, Auteur ; Chunhua ZHAO, Auteur ; Robert NICOLSON, Auteur ; Stelios GEORGIADES, Auteur ; Peter SZATMARI, Auteur ; Stephen SCHERER, Auteur ; Wendy ROBERTS, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Rosanna WEKSBERG, Auteur Article en page(s) : p.3610-3623 Langues : Anglais (eng) Mots-clés : Attention Deficit Disorder with Hyperactivity/genetics  Autism Spectrum Disorder/genetics  DNA Methylation  Female  Humans  Male  Obsessive-Compulsive Disorder  Oxytocin/metabolism  Receptors, Oxytocin/genetics  Adhd  Asd  Ocd  Oxtr Index. décimale : PER Périodiques Résumé : Many neurodevelopmental disorders (NDDs) share common learning and behavioural impairments, as well as features such as dysregulation of the oxytocin hormone. Here, we examined DNA methylation (DNAm) in the 1st intron of the oxytocin receptor gene, OXTR, in patients with autism spectrum (ASD), attention deficit and hyperactivity (ADHD) and obsessive compulsive (OCD) disorders. DNAm of OXTR was assessed for cohorts of ASD (blood), ADHD (saliva), OCD (saliva), which uncovered sex-specific DNAm differences compared to neurotypical, tissue-matched controls. Individuals with ASD or ADHD exhibiting extreme DNAm values had lower IQ and more social problems, respectively, than those with DNAm within normative ranges. This suggests that OXTR DNAm patterns are altered across NDDs and may be correlated with common clinical outcomes. En ligne : http://dx.doi.org/10.1007/s10803-020-04792-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453 [article] DNA Methylation of the Oxytocin Receptor Across Neurodevelopmental Disorders [texte imprimé] / Michelle T. SIU, Auteur ; Sabrina J. GOODMAN, Auteur ; Isaac YELLAN, Auteur ; Darci T. BUTCHER, Auteur ; Maryam JANGJOO, Auteur ; Daria GRAFODATSKAYA, Auteur ; Rageen RAJENDRAM, Auteur ; Youliang LOU, Auteur ; Rujun ZHANG, Auteur ; Chunhua ZHAO, Auteur ; Robert NICOLSON, Auteur ; Stelios GEORGIADES, Auteur ; Peter SZATMARI, Auteur ; Stephen SCHERER, Auteur ; Wendy ROBERTS, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Rosanna WEKSBERG, Auteur . - p.3610-3623. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 51-10 (October 2021) . - p.3610-3623 Mots-clés : Attention Deficit Disorder with Hyperactivity/genetics  Autism Spectrum Disorder/genetics  DNA Methylation  Female  Humans  Male  Obsessive-Compulsive Disorder  Oxytocin/metabolism  Receptors, Oxytocin/genetics  Adhd  Asd  Ocd  Oxtr Index. décimale : PER Périodiques Résumé : Many neurodevelopmental disorders (NDDs) share common learning and behavioural impairments, as well as features such as dysregulation of the oxytocin hormone. Here, we examined DNA methylation (DNAm) in the 1st intron of the oxytocin receptor gene, OXTR, in patients with autism spectrum (ASD), attention deficit and hyperactivity (ADHD) and obsessive compulsive (OCD) disorders. DNAm of OXTR was assessed for cohorts of ASD (blood), ADHD (saliva), OCD (saliva), which uncovered sex-specific DNAm differences compared to neurotypical, tissue-matched controls. Individuals with ASD or ADHD exhibiting extreme DNAm values had lower IQ and more social problems, respectively, than those with DNAm within normative ranges. This suggests that OXTR DNAm patterns are altered across NDDs and may be correlated with common clinical outcomes. En ligne : http://dx.doi.org/10.1007/s10803-020-04792-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453

Exploring sensory phenotypes in autism spectrum disorder / Nichole E. SCHEERER in Molecular Autism, 12 (2021)  

Public ISBD [article]  inMolecular Autism > 12 (2021) . - 67 p. Titre : Exploring sensory phenotypes in autism spectrum disorder Type de document : texte imprimé Auteurs : Nichole E. SCHEERER, Auteur ; Kristina CURCIN, Auteur ; Bobby STOJANOSKI, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Robert NICOLSON, Auteur ; Elizabeth KELLEY, Auteur ; Stelios GEORGIADES, Auteur ; Xian LIU, Auteur ; Ryan A. STEVENSON, Auteur Article en page(s) : 67 p. Langues : Anglais (eng) Mots-clés : ADHD traits  Adaptive behaviour  Autism spectrum disorder  Cluster analysis  OCD traits  Restrictive and repetitive behaviours  Sensory phenotypes  Sensory processing  Social communication  have no competing interests. Index. décimale : PER Périodiques Résumé : BACKGROUND: Atypical reactions to the sensory environment are often reported in autistic individuals, with a high degree of variability across the sensory modalities. These sensory differences have been shown to promote challenging behaviours and distress in autistic individuals and are predictive of other functions including motor, social, and cognitive abilities. Preliminary research suggests that specific sensory differences may cluster together within individuals creating discrete sensory phenotypes. However, the manner in which these sensory differences cluster, and whether the resulting phenotypes are associated with specific cognitive and social challenges is unclear. METHODS: Short sensory profile data from 599 autistic children and adults between the ages of 1 and 21 years were subjected to a K-means cluster analysis. Analysis of variances compared age, adaptive behaviour, and traits associated with autism, attention-deficit and hyperactivity disorder, and obsessive and compulsive disorder across the resultant clusters. RESULTS: A five-cluster model was found to minimize error variance and produce five sensory phenotypes: (1) sensory adaptive, (2) generalized sensory differences, (3) taste and smell sensitivity, (4) under-responsive and sensation seeking, and (5) movement difficulties with low energy. Age, adaptive behaviour, and traits associated with autism, attention-deficit and hyperactivity disorder, and obsessive and compulsive disorder were found to differ significantly across the five phenotypes. LIMITATIONS: The results were based on parent-report measures of sensory processing, adaptive behaviour, traits associated with autism, attention-deficit and hyperactivity disorder, and obsessive and compulsive disorder, which may limit the generalizability of the findings. Further, not all measures are standardized, or psychometrically validated with an autism population. Autistic individuals with an intellectual disability were underrepresented in this sample. Further, as these data were obtained from established records from a large provincial database, not all measures were completed for all individuals. CONCLUSIONS: These findings suggest that sensory difficulties in autistic individuals can be clustered into sensory phenotypes, and that these phenotypes are associated with behavioural differences. Given the large degree of heterogeneity in sensory difficulties seen in the autistic population, these sensory phenotypes represent an effective way to parse that heterogeneity and create phenotypes that may aid in the development of effective treatments and interventions for sensory difficulties. En ligne : http://dx.doi.org/10.1186/s13229-021-00471-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=459 [article] Exploring sensory phenotypes in autism spectrum disorder [texte imprimé] / Nichole E. SCHEERER, Auteur ; Kristina CURCIN, Auteur ; Bobby STOJANOSKI, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Robert NICOLSON, Auteur ; Elizabeth KELLEY, Auteur ; Stelios GEORGIADES, Auteur ; Xian LIU, Auteur ; Ryan A. STEVENSON, Auteur . - 67 p. Langues : Anglais (eng) in Molecular Autism > 12 (2021) . - 67 p. Mots-clés : ADHD traits  Adaptive behaviour  Autism spectrum disorder  Cluster analysis  OCD traits  Restrictive and repetitive behaviours  Sensory phenotypes  Sensory processing  Social communication  have no competing interests. Index. décimale : PER Périodiques Résumé : BACKGROUND: Atypical reactions to the sensory environment are often reported in autistic individuals, with a high degree of variability across the sensory modalities. These sensory differences have been shown to promote challenging behaviours and distress in autistic individuals and are predictive of other functions including motor, social, and cognitive abilities. Preliminary research suggests that specific sensory differences may cluster together within individuals creating discrete sensory phenotypes. However, the manner in which these sensory differences cluster, and whether the resulting phenotypes are associated with specific cognitive and social challenges is unclear. METHODS: Short sensory profile data from 599 autistic children and adults between the ages of 1 and 21 years were subjected to a K-means cluster analysis. Analysis of variances compared age, adaptive behaviour, and traits associated with autism, attention-deficit and hyperactivity disorder, and obsessive and compulsive disorder across the resultant clusters. RESULTS: A five-cluster model was found to minimize error variance and produce five sensory phenotypes: (1) sensory adaptive, (2) generalized sensory differences, (3) taste and smell sensitivity, (4) under-responsive and sensation seeking, and (5) movement difficulties with low energy. Age, adaptive behaviour, and traits associated with autism, attention-deficit and hyperactivity disorder, and obsessive and compulsive disorder were found to differ significantly across the five phenotypes. LIMITATIONS: The results were based on parent-report measures of sensory processing, adaptive behaviour, traits associated with autism, attention-deficit and hyperactivity disorder, and obsessive and compulsive disorder, which may limit the generalizability of the findings. Further, not all measures are standardized, or psychometrically validated with an autism population. Autistic individuals with an intellectual disability were underrepresented in this sample. Further, as these data were obtained from established records from a large provincial database, not all measures were completed for all individuals. CONCLUSIONS: These findings suggest that sensory difficulties in autistic individuals can be clustered into sensory phenotypes, and that these phenotypes are associated with behavioural differences. Given the large degree of heterogeneity in sensory difficulties seen in the autistic population, these sensory phenotypes represent an effective way to parse that heterogeneity and create phenotypes that may aid in the development of effective treatments and interventions for sensory difficulties. En ligne : http://dx.doi.org/10.1186/s13229-021-00471-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=459

Magnetoencephalographic (MEG) brain activity during a mental flexibility task suggests some shared neurobiology in children with neurodevelopmental disorders / Alexandra MOGADAM in Journal of Neurodevelopmental Disorders, 11-1 (December 2019)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 11-1 (December 2019) . - 19 p. Titre : Magnetoencephalographic (MEG) brain activity during a mental flexibility task suggests some shared neurobiology in children with neurodevelopmental disorders Type de document : texte imprimé Auteurs : Alexandra MOGADAM, Auteur ; Alex E. KELLER, Auteur ; Paul D. ARNOLD, Auteur ; Russell SCHACHAR, Auteur ; Jason P. LERCH, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Elizabeth W. PANG, Auteur Article en page(s) : 19 p. Langues : Anglais (eng) Mots-clés : Adhd  Asd  Corticostriatal projections  Executive function  Meg  Neurodevelopmental disorders  Ocd  Rbs-r  Set shifting  Tocs Index. décimale : PER Périodiques Résumé : BACKGROUND: Children with neurodevelopmental disorders (NDDs) exhibit a shared phenotype that involves executive dysfunctions including impairments in mental flexibility (MF). It is of interest to understand if this phenotype stems from some shared neurobiology. METHODS: To investigate this possibility, we used magnetoencephalography (MEG) neuroimaging to compare brain activity in children (n = 88; 8-15 years) with autism spectrum disorders (ASD), attention deficit hyperactivity disorder (ADHD) and obsessive-compulsive disorder (OCD), as they completed a set-shifting/mental flexibility task. RESULTS: Neuroimaging results revealed a similar parietal activation profile across the NDD, groups suggesting a link to their shared phenotype. Differences in frontal activity differentiated the three clinical groups. Brain-behaviour analyses showed a link with repetitive behaviours suggesting shared dysfunction in the associative loop of the corticostriatal system. CONCLUSION: Our study supports the notion that NDDs may exist along a complex phenotypic/biological continuum. All NDD groups showed a sustained parietal activity profile suggesting that they share a strong reliance on the posterior parietal cortices to complete the mental flexibility task; future studies could elucidate whether this is due to delayed brain development or compensatory functioning. The differences in frontal activity may play a role in differentiating the NDDs. The OCD group showed sustained prefrontal activity that may be reflective of hyperfrontality. The ASD group showed reduced frontal activation suggestive of frontal dysfunction and the ADHD group showed an extensive hypoactivity that included frontal and parietal regions. Brain-behaviour analyses showed a significant correlation with repetitive behaviours which may reflect dysfunction in the associative loop of the corticostriatal system, linked to inflexible behaviours. En ligne : https://dx.doi.org/10.1186/s11689-019-9280-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=409 [article] Magnetoencephalographic (MEG) brain activity during a mental flexibility task suggests some shared neurobiology in children with neurodevelopmental disorders [texte imprimé] / Alexandra MOGADAM, Auteur ; Alex E. KELLER, Auteur ; Paul D. ARNOLD, Auteur ; Russell SCHACHAR, Auteur ; Jason P. LERCH, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Elizabeth W. PANG, Auteur . - 19 p. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 11-1 (December 2019) . - 19 p. Mots-clés : Adhd  Asd  Corticostriatal projections  Executive function  Meg  Neurodevelopmental disorders  Ocd  Rbs-r  Set shifting  Tocs Index. décimale : PER Périodiques Résumé : BACKGROUND: Children with neurodevelopmental disorders (NDDs) exhibit a shared phenotype that involves executive dysfunctions including impairments in mental flexibility (MF). It is of interest to understand if this phenotype stems from some shared neurobiology. METHODS: To investigate this possibility, we used magnetoencephalography (MEG) neuroimaging to compare brain activity in children (n = 88; 8-15 years) with autism spectrum disorders (ASD), attention deficit hyperactivity disorder (ADHD) and obsessive-compulsive disorder (OCD), as they completed a set-shifting/mental flexibility task. RESULTS: Neuroimaging results revealed a similar parietal activation profile across the NDD, groups suggesting a link to their shared phenotype. Differences in frontal activity differentiated the three clinical groups. Brain-behaviour analyses showed a link with repetitive behaviours suggesting shared dysfunction in the associative loop of the corticostriatal system. CONCLUSION: Our study supports the notion that NDDs may exist along a complex phenotypic/biological continuum. All NDD groups showed a sustained parietal activity profile suggesting that they share a strong reliance on the posterior parietal cortices to complete the mental flexibility task; future studies could elucidate whether this is due to delayed brain development or compensatory functioning. The differences in frontal activity may play a role in differentiating the NDDs. The OCD group showed sustained prefrontal activity that may be reflective of hyperfrontality. The ASD group showed reduced frontal activation suggestive of frontal dysfunction and the ADHD group showed an extensive hypoactivity that included frontal and parietal regions. Brain-behaviour analyses showed a significant correlation with repetitive behaviours which may reflect dysfunction in the associative loop of the corticostriatal system, linked to inflexible behaviours. En ligne : https://dx.doi.org/10.1186/s11689-019-9280-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=409

Obsessive-compulsive disorder and attention-deficit/hyperactivity disorder: distinct associations with DNA methylation and genetic variation / Sarah J. GOODMAN in Journal of Neurodevelopmental Disorders, 12 (2020)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 12 (2020) Titre : Obsessive-compulsive disorder and attention-deficit/hyperactivity disorder: distinct associations with DNA methylation and genetic variation Type de document : texte imprimé Auteurs : Sarah J. GOODMAN, Auteur ; Christie L. BURTON, Auteur ; Darci T. BUTCHER, Auteur ; Michelle T. SIU, Auteur ; Mathieu LEMIRE, Auteur ; Eric CHATER-DIEHL, Auteur ; Andrei L. TURINSKY, Auteur ; Michael BRUDNO, Auteur ; Noam SORENI, Auteur ; David ROSENBERG, Auteur ; Kate D. FITZGERALD, Auteur ; Gregory L. HANNA, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Paul D. ARNOLD, Auteur ; Jennifer CROSBIE, Auteur ; Russell SCHACHAR, Auteur ; Rosanna WEKSBERG, Auteur Langues : Anglais (eng) Mots-clés : Attention Deficit Disorder with Hyperactivity/genetics  DNA Methylation/genetics  Genetic Variation/genetics  Humans  Obsessive-Compulsive Disorder/genetics  Adhd  Biomarker  DNA methylation  Epigenetics  Ocd Index. décimale : PER Périodiques Résumé : BACKGROUND: A growing body of research has demonstrated associations between specific neurodevelopmental disorders and variation in DNA methylation (DNAm), implicating this molecular mark as a possible contributor to the molecular etiology of these disorders and/or as a novel disease biomarker. Furthermore, genetic risk variants of neurodevelopmental disorders have been found to be enriched at loci associated with DNAm patterns, referred to as methylation quantitative trait loci (mQTLs). METHODS: We conducted two epigenome-wide association studies in individuals with attention-deficit/hyperactivity disorder (ADHD) or obsessive-compulsive disorder (OCD) (aged 4-18 years) using DNA extracted from saliva. DNAm data generated on the Illumina Human Methylation 450 K array were used to examine the interaction between genetic variation and DNAm patterns associated with these disorders. RESULTS: Using linear regression followed by principal component analysis, individuals with the most endorsed symptoms of ADHD or OCD were found to have significantly more distinct DNAm patterns from controls, as compared to all cases. This suggested that the phenotypic heterogeneity of these disorders is reflected in altered DNAm at specific sites. Further investigations of the DNAm sites associated with each disorder revealed that despite little overlap of these DNAm sites across the two disorders, both disorders were significantly enriched for mQTLs within our sample. CONCLUSIONS: Our DNAm data provide insights into the regulatory changes associated with genetic variation, highlighting their potential utility both in directing GWAS and in elucidating the pathophysiology of neurodevelopmental disorders. En ligne : https://dx.doi.org/10.1186/s11689-020-09324-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=573 [article] Obsessive-compulsive disorder and attention-deficit/hyperactivity disorder: distinct associations with DNA methylation and genetic variation [texte imprimé] / Sarah J. GOODMAN, Auteur ; Christie L. BURTON, Auteur ; Darci T. BUTCHER, Auteur ; Michelle T. SIU, Auteur ; Mathieu LEMIRE, Auteur ; Eric CHATER-DIEHL, Auteur ; Andrei L. TURINSKY, Auteur ; Michael BRUDNO, Auteur ; Noam SORENI, Auteur ; David ROSENBERG, Auteur ; Kate D. FITZGERALD, Auteur ; Gregory L. HANNA, Auteur ; Evdokia ANAGNOSTOU, Auteur ; Paul D. ARNOLD, Auteur ; Jennifer CROSBIE, Auteur ; Russell SCHACHAR, Auteur ; Rosanna WEKSBERG, Auteur. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 12 (2020) Mots-clés : Attention Deficit Disorder with Hyperactivity/genetics  DNA Methylation/genetics  Genetic Variation/genetics  Humans  Obsessive-Compulsive Disorder/genetics  Adhd  Biomarker  DNA methylation  Epigenetics  Ocd Index. décimale : PER Périodiques Résumé : BACKGROUND: A growing body of research has demonstrated associations between specific neurodevelopmental disorders and variation in DNA methylation (DNAm), implicating this molecular mark as a possible contributor to the molecular etiology of these disorders and/or as a novel disease biomarker. Furthermore, genetic risk variants of neurodevelopmental disorders have been found to be enriched at loci associated with DNAm patterns, referred to as methylation quantitative trait loci (mQTLs). METHODS: We conducted two epigenome-wide association studies in individuals with attention-deficit/hyperactivity disorder (ADHD) or obsessive-compulsive disorder (OCD) (aged 4-18 years) using DNA extracted from saliva. DNAm data generated on the Illumina Human Methylation 450 K array were used to examine the interaction between genetic variation and DNAm patterns associated with these disorders. RESULTS: Using linear regression followed by principal component analysis, individuals with the most endorsed symptoms of ADHD or OCD were found to have significantly more distinct DNAm patterns from controls, as compared to all cases. This suggested that the phenotypic heterogeneity of these disorders is reflected in altered DNAm at specific sites. Further investigations of the DNAm sites associated with each disorder revealed that despite little overlap of these DNAm sites across the two disorders, both disorders were significantly enriched for mQTLs within our sample. CONCLUSIONS: Our DNAm data provide insights into the regulatory changes associated with genetic variation, highlighting their potential utility both in directing GWAS and in elucidating the pathophysiology of neurodevelopmental disorders. En ligne : https://dx.doi.org/10.1186/s11689-020-09324-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=573

Obsessive-compulsive disorder in children and youth: neurocognitive function in clinic and community samples / Russell SCHACHAR in Journal of Child Psychology and Psychiatry, 63-8 (August 2022)  

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Presentation and Correlates of Hoarding Behaviors in Children with Autism Spectrum Disorders and Comorbid Anxiety or Obsessive-Compulsive Symptoms / V. LA BUISSONNIERE-ARIZA in Journal of Autism and Developmental Disorders, 48-12 (December 2018)  

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Repetitive Behaviors in Autism and Obsessive–Compulsive Disorder: New Perspectives from a Network Analysis / Laura RUZZANO in Journal of Autism and Developmental Disorders, 45-1 (January 2015)  

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Differential Diagnosis / Marie NEBEL-SCHWALM

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Do the traits of autism-spectrum overlap with those of schizophrenia or obsessive-compulsive disorder in the general population? / Akio WAKABAYASHI in Research in Autism Spectrum Disorders, 6-2 (April-June 2012)  

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