EU-AIMS Longitudinal European Autism Project (LEAP): the autism twin cohort / J. ISAKSSON in Molecular Autism, 9 (2018)  

Public ISBD [article]  inMolecular Autism > 9 (2018) . - 26p. Titre : EU-AIMS Longitudinal European Autism Project (LEAP): the autism twin cohort Type de document : Texte imprimé et/ou numérique Auteurs : J. ISAKSSON, Auteur ; K. TAMMIMIES, Auteur ; J. NEUFELD, Auteur ; Elodie CAUVET, Auteur ; K. LUNDIN, Auteur ; Jan K. BUITELAAR, Auteur ; E. LOTH, Auteur ; D. G. M. MURPHY, Auteur ; W. SPOOREN, Auteur ; Sven BÖLTE, Auteur Article en page(s) : 26p. Langues : Anglais (eng) Mots-clés : Adolescent  Autistic Disorder/diagnosis/epidemiology/genetics  Child  Cohort Studies  Europe  Female  Humans  Longitudinal Studies  Male  Phenotype  Twins, Dizygotic/statistics & numerical data  Twins, Monozygotic/statistics & numerical data  adhd  Autism spectrum disorder  Biomarkers  Brain  Cognition  Genetics  Intervention  Twins Index. décimale : PER Périodiques Résumé : EU-AIMS is the largest European research program aiming to identify stratification biomarkers and novel interventions for autism spectrum disorder (ASD). Within the program, the Longitudinal European Autism Project (LEAP) has recruited and comprehensively phenotyped a rare sample of 76 monozygotic and dizygotic twins, discordant, or concordant for ASD plus 30 typically developing twins. The aim of this letter is to complete previous descriptions of the LEAP case-control sample, clinically characterize, and investigate the suitability of the sample for ASD twin-control analyses purposes and share some 'lessons learnt.' Among the twins, a diagnosis of ASD is associated with increased symptom levels of ADHD, higher rates of intellectual disability, and lower family income. For the future, we conclude that the LEAP twin cohort offers multiple options for analyses of genetic and shared and non-shared environmental factors to generate new hypotheses for the larger cohort of LEAP singletons, but particularly cross-validate and refine evidence from it. En ligne : https://dx.doi.org/10.1186/s13229-018-0212-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=371 [article] EU-AIMS Longitudinal European Autism Project (LEAP): the autism twin cohort [Texte imprimé et/ou numérique] / J. ISAKSSON, Auteur ; K. TAMMIMIES, Auteur ; J. NEUFELD, Auteur ; Elodie CAUVET, Auteur ; K. LUNDIN, Auteur ; Jan K. BUITELAAR, Auteur ; E. LOTH, Auteur ; D. G. M. MURPHY, Auteur ; W. SPOOREN, Auteur ; Sven BÖLTE, Auteur . - 26p. Langues : Anglais (eng) in Molecular Autism > 9 (2018) . - 26p. Mots-clés : Adolescent  Autistic Disorder/diagnosis/epidemiology/genetics  Child  Cohort Studies  Europe  Female  Humans  Longitudinal Studies  Male  Phenotype  Twins, Dizygotic/statistics & numerical data  Twins, Monozygotic/statistics & numerical data  adhd  Autism spectrum disorder  Biomarkers  Brain  Cognition  Genetics  Intervention  Twins Index. décimale : PER Périodiques Résumé : EU-AIMS is the largest European research program aiming to identify stratification biomarkers and novel interventions for autism spectrum disorder (ASD). Within the program, the Longitudinal European Autism Project (LEAP) has recruited and comprehensively phenotyped a rare sample of 76 monozygotic and dizygotic twins, discordant, or concordant for ASD plus 30 typically developing twins. The aim of this letter is to complete previous descriptions of the LEAP case-control sample, clinically characterize, and investigate the suitability of the sample for ASD twin-control analyses purposes and share some 'lessons learnt.' Among the twins, a diagnosis of ASD is associated with increased symptom levels of ADHD, higher rates of intellectual disability, and lower family income. For the future, we conclude that the LEAP twin cohort offers multiple options for analyses of genetic and shared and non-shared environmental factors to generate new hypotheses for the larger cohort of LEAP singletons, but particularly cross-validate and refine evidence from it. En ligne : https://dx.doi.org/10.1186/s13229-018-0212-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=371

Familial confounding on the ability to read minds: A co-twin control study / J. ISAKSSON in Autism, 23-8 (November 2019)  

Public ISBD [article]  inAutism > 23-8 (November 2019) . - p.1948-1956 Titre : Familial confounding on the ability to read minds: A co-twin control study Type de document : Texte imprimé et/ou numérique Auteurs : J. ISAKSSON, Auteur ; M. J. TAYLOR, Auteur ; K. LUNDIN, Auteur ; J. NEUFELD, Auteur ; Sven BÖLTE, Auteur Article en page(s) : p.1948-1956 Langues : Anglais (eng) Mots-clés : attention-deficit/hyperactivity disorder  autism spectrum disorders  environmental factors  genetics  psychiatric comorbidity  social cognition and social behavior Index. décimale : PER Périodiques Résumé : Alterations in social cognition are hypothesized to underlie social communication challenges in autism spectrum disorder. However, the etiologic underpinnings driving this association, as well as the impact of other psychiatric conditions on the association, remain unclear. Using a co-twin control design, we examined n = 308 twins (mean age = 16.63; 46% females) with autism spectrum disorder, attention-deficit/hyperactivity disorder, affective disorders, or typical development using the Reading the Mind in the Eyes Test to operationalize social cognition ability. Clinical diagnosis of autism spectrum disorder, as well as the extent of quantitative autistic traits, as measured by parental reports using the Social Responsiveness Scale-2, predicted fewer expected responses on the Reading the Mind in the Eyes Test across the pairs. The association remained when adjusting for other diagnoses and IQ. In addition, male sex, lower age, and lower IQ predicted poorer performance on the Reading the Mind in the Eyes Test. The associations between autism and social cognition ability were lost within pairs in both the full sample and the monozygotic subsample. We conclude that the association between autism and social cognition across the sample highlights the importance of social cognition alterations in autism spectrum disorder when compared with other conditions. The attenuation of the association in the within-pair models indicate familial confounding, such as genes and shared environment, influencing both autism and social cognition. En ligne : http://dx.doi.org/10.1177/1362361319836380 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=407 [article] Familial confounding on the ability to read minds: A co-twin control study [Texte imprimé et/ou numérique] / J. ISAKSSON, Auteur ; M. J. TAYLOR, Auteur ; K. LUNDIN, Auteur ; J. NEUFELD, Auteur ; Sven BÖLTE, Auteur . - p.1948-1956. Langues : Anglais (eng) in Autism > 23-8 (November 2019) . - p.1948-1956 Mots-clés : attention-deficit/hyperactivity disorder  autism spectrum disorders  environmental factors  genetics  psychiatric comorbidity  social cognition and social behavior Index. décimale : PER Périodiques Résumé : Alterations in social cognition are hypothesized to underlie social communication challenges in autism spectrum disorder. However, the etiologic underpinnings driving this association, as well as the impact of other psychiatric conditions on the association, remain unclear. Using a co-twin control design, we examined n = 308 twins (mean age = 16.63; 46% females) with autism spectrum disorder, attention-deficit/hyperactivity disorder, affective disorders, or typical development using the Reading the Mind in the Eyes Test to operationalize social cognition ability. Clinical diagnosis of autism spectrum disorder, as well as the extent of quantitative autistic traits, as measured by parental reports using the Social Responsiveness Scale-2, predicted fewer expected responses on the Reading the Mind in the Eyes Test across the pairs. The association remained when adjusting for other diagnoses and IQ. In addition, male sex, lower age, and lower IQ predicted poorer performance on the Reading the Mind in the Eyes Test. The associations between autism and social cognition ability were lost within pairs in both the full sample and the monozygotic subsample. We conclude that the association between autism and social cognition across the sample highlights the importance of social cognition alterations in autism spectrum disorder when compared with other conditions. The attenuation of the association in the within-pair models indicate familial confounding, such as genes and shared environment, influencing both autism and social cognition. En ligne : http://dx.doi.org/10.1177/1362361319836380 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=407

Sex differences in brain structure: a twin study on restricted and repetitive behaviors in twin pairs with and without autism / A. VAN'T WESTEINDE in Molecular Autism, 11 (2020)  

Public ISBD [article]  inMolecular Autism > 11 (2020) . - 1 p. Titre : Sex differences in brain structure: a twin study on restricted and repetitive behaviors in twin pairs with and without autism Type de document : Texte imprimé et/ou numérique Auteurs : A. VAN'T WESTEINDE, Auteur ; Elodie CAUVET, Auteur ; R. TORO, Auteur ; R. KUJA-HALKOLA, Auteur ; J. NEUFELD, Auteur ; K. MEVEL, Auteur ; Sven BÖLTE, Auteur Article en page(s) : 1 p. Langues : Anglais (eng) Mots-clés : Autism  Neuroanatomy  Repetitive behaviors  Sex differences  Twins Index. décimale : PER Périodiques Résumé : Background: Females with autism spectrum disorder have been reported to exhibit fewer and less severe restricted and repetitive behaviors and interests compared to males. This difference might indicate sex-specific alterations of brain networks involved in autism symptom domains, especially within cortico-striatal and sensory integration networks. This study used a well-controlled twin design to examine sex differences in brain anatomy in relation to repetitive behaviors. Methods: In 75 twin pairs (n = 150, 62 females, 88 males) enriched for autism spectrum disorder (n = 32), and other neurodevelopmental disorders (n = 32), we explored the association of restricted and repetitive behaviors and interests-operationalized by the Autism Diagnostic Interview-Revised (C domain) and the Social Responsiveness Scale-2 (Restricted Interests and Repetitive Behavior subscale)-with cortical volume, surface area and thickness of neocortical, sub-cortical, and cerebellar networks. Results: Co-twin control analyses revealed within-pair associations between RRBI symptoms and increased thickness of the right intraparietal sulcus and reduced volume of the right orbital gyrus in females only, even though the mean number of RRBIs did not differ between the sexes. In a sub-sample of ASD-discordant pairs, increased thickness in association with RRBIs was found exclusively in females in the orbitofrontal regions, superior frontal gyrus, and intraparietal sulcus, while in males RRBIs tended to be associated with increased volume of the bilateral pallidum. Limitations: However, due to a small sample size and the small difference in RRBI symptoms within pairs, the results of this exploratory study need to be interpreted with caution. Conclusions: Our findings suggest that structural alterations of fronto-parietal networks in association with RRBIs are found mostly in females, while striatal networks are more affected in males. These results endorse the importance of investigating sex differences in the neurobiology of autism symptoms, and indicate different etiological pathways underlying restricted and repetitive behaviors and interests in females and males. En ligne : http://dx.doi.org/10.1186/s13229-019-0309-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=414 [article] Sex differences in brain structure: a twin study on restricted and repetitive behaviors in twin pairs with and without autism [Texte imprimé et/ou numérique] / A. VAN'T WESTEINDE, Auteur ; Elodie CAUVET, Auteur ; R. TORO, Auteur ; R. KUJA-HALKOLA, Auteur ; J. NEUFELD, Auteur ; K. MEVEL, Auteur ; Sven BÖLTE, Auteur . - 1 p. Langues : Anglais (eng) in Molecular Autism > 11 (2020) . - 1 p. Mots-clés : Autism  Neuroanatomy  Repetitive behaviors  Sex differences  Twins Index. décimale : PER Périodiques Résumé : Background: Females with autism spectrum disorder have been reported to exhibit fewer and less severe restricted and repetitive behaviors and interests compared to males. This difference might indicate sex-specific alterations of brain networks involved in autism symptom domains, especially within cortico-striatal and sensory integration networks. This study used a well-controlled twin design to examine sex differences in brain anatomy in relation to repetitive behaviors. Methods: In 75 twin pairs (n = 150, 62 females, 88 males) enriched for autism spectrum disorder (n = 32), and other neurodevelopmental disorders (n = 32), we explored the association of restricted and repetitive behaviors and interests-operationalized by the Autism Diagnostic Interview-Revised (C domain) and the Social Responsiveness Scale-2 (Restricted Interests and Repetitive Behavior subscale)-with cortical volume, surface area and thickness of neocortical, sub-cortical, and cerebellar networks. Results: Co-twin control analyses revealed within-pair associations between RRBI symptoms and increased thickness of the right intraparietal sulcus and reduced volume of the right orbital gyrus in females only, even though the mean number of RRBIs did not differ between the sexes. In a sub-sample of ASD-discordant pairs, increased thickness in association with RRBIs was found exclusively in females in the orbitofrontal regions, superior frontal gyrus, and intraparietal sulcus, while in males RRBIs tended to be associated with increased volume of the bilateral pallidum. Limitations: However, due to a small sample size and the small difference in RRBI symptoms within pairs, the results of this exploratory study need to be interpreted with caution. Conclusions: Our findings suggest that structural alterations of fronto-parietal networks in association with RRBIs are found mostly in females, while striatal networks are more affected in males. These results endorse the importance of investigating sex differences in the neurobiology of autism symptoms, and indicate different etiological pathways underlying restricted and repetitive behaviors and interests in females and males. En ligne : http://dx.doi.org/10.1186/s13229-019-0309-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=414

Social Cognition in Autism and Other Neurodevelopmental Disorders: A Co-twin Control Study / J. ISAKSSON in Journal of Autism and Developmental Disorders, 49-7 (July 2019)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 49-7 (July 2019) . - p.2838-2848 Titre : Social Cognition in Autism and Other Neurodevelopmental Disorders: A Co-twin Control Study Type de document : Texte imprimé et/ou numérique Auteurs : J. ISAKSSON, Auteur ; A. VAN'T WESTEINDE, Auteur ; Elodie CAUVET, Auteur ; R. KUJA-HALKOLA, Auteur ; K. LUNDIN, Auteur ; J. NEUFELD, Auteur ; C. WILLFORS, Auteur ; Sven BÖLTE, Auteur Article en page(s) : p.2838-2848 Langues : Anglais (eng) Mots-clés : Adhd  Autism spectrum disorder  Movie for the assessment of social cognition  Ratss  Twins Index. décimale : PER Périodiques Résumé : Alterations in social cognition (SC) are hypothesized to underlie social communication and interaction challenges in autism spectrum disorder (ASD). The aetiological underpinnings driving this association remain unclear. We examined SC in 196 twins with ASD, other neurodevelopmental disorders or typical development using the naturalistic Movie for the Assessment of Social Cognition. Autism and its severity were assessed with the Autism Diagnostic Observation Schedule-2, and autistic traits with the Social Responsiveness Scale-2. Using within twin-pair regression models, controlling for age, sex, IQ, and unmeasured familial confounders such as genetic background and shared-environment, SC correlated with ASD diagnosis, autism severity, and autistic traits. Our findings highlight the importance of SC alterations in autism and suggest a non-shared environmental impact on the association. En ligne : http://dx.doi.org/10.1007/s10803-019-04001-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=402 [article] Social Cognition in Autism and Other Neurodevelopmental Disorders: A Co-twin Control Study [Texte imprimé et/ou numérique] / J. ISAKSSON, Auteur ; A. VAN'T WESTEINDE, Auteur ; Elodie CAUVET, Auteur ; R. KUJA-HALKOLA, Auteur ; K. LUNDIN, Auteur ; J. NEUFELD, Auteur ; C. WILLFORS, Auteur ; Sven BÖLTE, Auteur . - p.2838-2848. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 49-7 (July 2019) . - p.2838-2848 Mots-clés : Adhd  Autism spectrum disorder  Movie for the assessment of social cognition  Ratss  Twins Index. décimale : PER Périodiques Résumé : Alterations in social cognition (SC) are hypothesized to underlie social communication and interaction challenges in autism spectrum disorder (ASD). The aetiological underpinnings driving this association remain unclear. We examined SC in 196 twins with ASD, other neurodevelopmental disorders or typical development using the naturalistic Movie for the Assessment of Social Cognition. Autism and its severity were assessed with the Autism Diagnostic Observation Schedule-2, and autistic traits with the Social Responsiveness Scale-2. Using within twin-pair regression models, controlling for age, sex, IQ, and unmeasured familial confounders such as genetic background and shared-environment, SC correlated with ASD diagnosis, autism severity, and autistic traits. Our findings highlight the importance of SC alterations in autism and suggest a non-shared environmental impact on the association. En ligne : http://dx.doi.org/10.1007/s10803-019-04001-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=402

The impact of atypical sensory processing on adaptive functioning within and beyond autism: The role of familial factors / J. NEUFELD in Autism, 25-8 (November 2021)  

Public ISBD [article]  inAutism > 25-8 (November 2021) . - p.2341-2355 Titre : The impact of atypical sensory processing on adaptive functioning within and beyond autism: The role of familial factors Type de document : Texte imprimé et/ou numérique Auteurs : J. NEUFELD, Auteur ; L. HEDEROS ERIKSSON, Auteur ; R. HAMMARSTEN, Auteur ; K. LUNDIN REMNÉLIUS, Auteur ; J. TILLMANN, Auteur ; J. ISAKSSON, Auteur ; Sven BÖLTE, Auteur Article en page(s) : p.2341-2355 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/genetics  Autistic Disorder/genetics  Cognition  Humans  Perception  Sensation  adaptive functioning  autism  environment  familial factors  genetics  sensory hyper-responsiveness  sensory processing  twin design Index. décimale : PER Périodiques Résumé : Individuals diagnosed with autism tend to process sensory information differently than individuals without autism, resulting for instance in increased sensitivity to sounds or smells. This leads to challenges in everyday life and may restrict the individual's daily functioning. How direct this link is, however, is currently unclear. We investigated this question in 289 twins of whom 60 were diagnosed with autism and further 61 were diagnosed with other neurodevelopmental disorders. We looked at the association between unusual sensory processing and adaptive skills, both across individuals and within-twin pairs, testing whether individuals with higher levels of atypical sensory processing showed reduced adaptive skills compared to their twins. Since twins share 50%-100% of their genes and part of their environment (e.g. family background), associations within-twin pairs are free from effects of these familial factors. We found that an increased sensitivity to, as well as the avoiding of, sensory input (hyper-responsiveness) was linked to reduced adaptive skills across individuals-but not within-twin pairs. We also found an association between the degree to which individuals seek for sensory input (sensation seeking) and reduced adaptive skills, but only in individuals diagnosed with autism. The results suggest that sensory hyper-responsiveness has negative effects on individuals' general ability to function, but that this link is influenced by familial factors and hence not direct. In addition, sensation seeking behaviors might have a negative impact on adaptive skills specifically in autistic individuals. En ligne : http://dx.doi.org/10.1177/13623613211019852 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=451 [article] The impact of atypical sensory processing on adaptive functioning within and beyond autism: The role of familial factors [Texte imprimé et/ou numérique] / J. NEUFELD, Auteur ; L. HEDEROS ERIKSSON, Auteur ; R. HAMMARSTEN, Auteur ; K. LUNDIN REMNÉLIUS, Auteur ; J. TILLMANN, Auteur ; J. ISAKSSON, Auteur ; Sven BÖLTE, Auteur . - p.2341-2355. Langues : Anglais (eng) in Autism > 25-8 (November 2021) . - p.2341-2355 Mots-clés : Autism Spectrum Disorder/genetics  Autistic Disorder/genetics  Cognition  Humans  Perception  Sensation  adaptive functioning  autism  environment  familial factors  genetics  sensory hyper-responsiveness  sensory processing  twin design Index. décimale : PER Périodiques Résumé : Individuals diagnosed with autism tend to process sensory information differently than individuals without autism, resulting for instance in increased sensitivity to sounds or smells. This leads to challenges in everyday life and may restrict the individual's daily functioning. How direct this link is, however, is currently unclear. We investigated this question in 289 twins of whom 60 were diagnosed with autism and further 61 were diagnosed with other neurodevelopmental disorders. We looked at the association between unusual sensory processing and adaptive skills, both across individuals and within-twin pairs, testing whether individuals with higher levels of atypical sensory processing showed reduced adaptive skills compared to their twins. Since twins share 50%-100% of their genes and part of their environment (e.g. family background), associations within-twin pairs are free from effects of these familial factors. We found that an increased sensitivity to, as well as the avoiding of, sensory input (hyper-responsiveness) was linked to reduced adaptive skills across individuals-but not within-twin pairs. We also found an association between the degree to which individuals seek for sensory input (sensation seeking) and reduced adaptive skills, but only in individuals diagnosed with autism. The results suggest that sensory hyper-responsiveness has negative effects on individuals' general ability to function, but that this link is influenced by familial factors and hence not direct. In addition, sensation seeking behaviors might have a negative impact on adaptive skills specifically in autistic individuals. En ligne : http://dx.doi.org/10.1177/13623613211019852 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=451

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