Cytokine levels and associations with symptom severity in male and female children with autism spectrum disorder / A. MASI in Molecular Autism, 8 (2017)  

Public ISBD [article]  inMolecular Autism > 8 (2017) . - 63p. Titre : Cytokine levels and associations with symptom severity in male and female children with autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : A. MASI, Auteur ; E. J. BREEN, Auteur ; Gail A. ALVARES, Auteur ; N. GLOZIER, Auteur ; I. B. HICKIE, Auteur ; A. HUNT, Auteur ; J. HUI, Auteur ; J. BEILBY, Auteur ; D. RAVINE, Auteur ; J. WRAY, Auteur ; Andrew J. O. WHITEHOUSE, Auteur ; A. J. GUASTELLA, Auteur Article en page(s) : 63p. Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Behavior  Cytokine  Pediatric  Severity Index. décimale : PER Périodiques Résumé : Background: Autism spectrum disorders (ASDs) are complex, pervasive, and heterogeneous neurodevelopmental conditions with varying trajectories, significant male bias and largely unknown etiology. However, an understanding of the biological mechanisms driving pathophysiology is evolving. Immune system aberrations, as identified through cytokine profiles, are believed to have a role in ASD. Altered cytokine levels may facilitate identification of ASD subtypes as well as provide biological markers of response to effective treatments. Research exploring the relationship between cytokine profiles and ASD symptoms is, however, in its infancy. The objective of this study was to explore relationships between cytokine levels and the severity of ASD and other clinical traits. Methods: Multiplex assay techniques were used to measure levels of 27 cytokines in plasma samples from a cohort of 144 children diagnosed with ASD. Results: Overall, results showed a significant negative association between platelet-derived growth factor (PDGF)-BB, and the severity of ASD symptoms. Furthermore, a significant interaction with sex suggested a different immune profile for females compared to males. ASD symptom severity was negatively associated with levels of 4 cytokines, IL-1beta, IL-8, MIP-1beta, and VEGF, in females, but not in males. Conclusions: Results of the present study suggest that an altered cytokine response or profile is associated with the severity of ASD-related symptoms, with sex a potential modifier of this relationship. Further research in larger populations which recognizes the importance of sex comparisons and longitudinal assessments are now required to extend and further describe the role of the immune system in ASD. En ligne : http://dx.doi.org/10.1186/s13229-017-0176-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330 [article] Cytokine levels and associations with symptom severity in male and female children with autism spectrum disorder [Texte imprimé et/ou numérique] / A. MASI, Auteur ; E. J. BREEN, Auteur ; Gail A. ALVARES, Auteur ; N. GLOZIER, Auteur ; I. B. HICKIE, Auteur ; A. HUNT, Auteur ; J. HUI, Auteur ; J. BEILBY, Auteur ; D. RAVINE, Auteur ; J. WRAY, Auteur ; Andrew J. O. WHITEHOUSE, Auteur ; A. J. GUASTELLA, Auteur . - 63p. Langues : Anglais (eng) in Molecular Autism > 8 (2017) . - 63p. Mots-clés : Autism spectrum disorder  Behavior  Cytokine  Pediatric  Severity Index. décimale : PER Périodiques Résumé : Background: Autism spectrum disorders (ASDs) are complex, pervasive, and heterogeneous neurodevelopmental conditions with varying trajectories, significant male bias and largely unknown etiology. However, an understanding of the biological mechanisms driving pathophysiology is evolving. Immune system aberrations, as identified through cytokine profiles, are believed to have a role in ASD. Altered cytokine levels may facilitate identification of ASD subtypes as well as provide biological markers of response to effective treatments. Research exploring the relationship between cytokine profiles and ASD symptoms is, however, in its infancy. The objective of this study was to explore relationships between cytokine levels and the severity of ASD and other clinical traits. Methods: Multiplex assay techniques were used to measure levels of 27 cytokines in plasma samples from a cohort of 144 children diagnosed with ASD. Results: Overall, results showed a significant negative association between platelet-derived growth factor (PDGF)-BB, and the severity of ASD symptoms. Furthermore, a significant interaction with sex suggested a different immune profile for females compared to males. ASD symptom severity was negatively associated with levels of 4 cytokines, IL-1beta, IL-8, MIP-1beta, and VEGF, in females, but not in males. Conclusions: Results of the present study suggest that an altered cytokine response or profile is associated with the severity of ASD-related symptoms, with sex a potential modifier of this relationship. Further research in larger populations which recognizes the importance of sex comparisons and longitudinal assessments are now required to extend and further describe the role of the immune system in ASD. En ligne : http://dx.doi.org/10.1186/s13229-017-0176-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330

Investigating associations between birth order and autism diagnostic phenotypes / Gail A. ALVARES in Journal of Child Psychology and Psychiatry, 62-8 (August 2021)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 62-8 (August 2021) . - p.961-970 Titre : Investigating associations between birth order and autism diagnostic phenotypes Type de document : Texte imprimé et/ou numérique Auteurs : Gail A. ALVARES, Auteur ; M. K. LICARI, Auteur ; P. G. STEVENSON, Auteur ; Keely BEBBINGTON, Auteur ; Matthew N. COOPER, Auteur ; E. J. GLASSON, Auteur ; D. W. TAN, Auteur ; M. ULJAREVIC, Auteur ; Kandice J. VARCIN, Auteur ; J. WRAY, Auteur ; Andrew J. O. WHITEHOUSE, Auteur Article en page(s) : p.961-970 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/diagnosis/epidemiology  Autistic Disorder  Birth Order  Child, Preschool  Female  Humans  Male  Phenotype  Prospective Studies  Autism spectrum disorder  diagnosis  first birth  intellectual disability Index. décimale : PER Périodiques Résumé : BACKGROUND: Birth order effects have been linked to variability in intelligence, educational attainment and sexual orientation. First- and later-born children have been linked to an increased likelihood of an Autism Spectrum Disorder (ASD) diagnosis, with a smaller body of evidence implicating decreases in cognitive functioning with increased birth order. The present study investigated the potential association between birth order and ASD diagnostic phenotypes in a large and representative population sample. METHODS: Data were obtained from an ongoing prospective diagnostic registry, collected between 1999 and 2017, including children (1-18 years of age, n = 5,404) diagnosed with ASD in the state of Western Australia. Children with ASD were ranked relative to sibling's birth to establish birth order within families at time of ASD diagnosis. Information reported to the registry by health professionals at the time of diagnostic evaluation included demographic and family characteristics, functional abilities and intellectual capacity. RESULTS: Adaptive functioning and intelligence scores decreased with increasing birth order, with later-born children more likely to have an intellectual disability. Compared to first-born children with siblings, first-born children without siblings at the time of diagnosis also exhibited decreased cognitive functioning. CONCLUSIONS: These findings demonstrate for the first time an association between increasing birth order and variability in ASD clinical phenotypes at diagnosis, with potential evidence of reproductive curtailment in children without siblings. Taken together, these findings have significant implications for advancing understanding about the potential mechanisms that contribute to heterogeneity in ASD clinical presentations as a function of birth order and family size. En ligne : http://dx.doi.org/10.1111/jcpp.13349 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456 [article] Investigating associations between birth order and autism diagnostic phenotypes [Texte imprimé et/ou numérique] / Gail A. ALVARES, Auteur ; M. K. LICARI, Auteur ; P. G. STEVENSON, Auteur ; Keely BEBBINGTON, Auteur ; Matthew N. COOPER, Auteur ; E. J. GLASSON, Auteur ; D. W. TAN, Auteur ; M. ULJAREVIC, Auteur ; Kandice J. VARCIN, Auteur ; J. WRAY, Auteur ; Andrew J. O. WHITEHOUSE, Auteur . - p.961-970. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 62-8 (August 2021) . - p.961-970 Mots-clés : Autism Spectrum Disorder/diagnosis/epidemiology  Autistic Disorder  Birth Order  Child, Preschool  Female  Humans  Male  Phenotype  Prospective Studies  Autism spectrum disorder  diagnosis  first birth  intellectual disability Index. décimale : PER Périodiques Résumé : BACKGROUND: Birth order effects have been linked to variability in intelligence, educational attainment and sexual orientation. First- and later-born children have been linked to an increased likelihood of an Autism Spectrum Disorder (ASD) diagnosis, with a smaller body of evidence implicating decreases in cognitive functioning with increased birth order. The present study investigated the potential association between birth order and ASD diagnostic phenotypes in a large and representative population sample. METHODS: Data were obtained from an ongoing prospective diagnostic registry, collected between 1999 and 2017, including children (1-18 years of age, n = 5,404) diagnosed with ASD in the state of Western Australia. Children with ASD were ranked relative to sibling's birth to establish birth order within families at time of ASD diagnosis. Information reported to the registry by health professionals at the time of diagnostic evaluation included demographic and family characteristics, functional abilities and intellectual capacity. RESULTS: Adaptive functioning and intelligence scores decreased with increasing birth order, with later-born children more likely to have an intellectual disability. Compared to first-born children with siblings, first-born children without siblings at the time of diagnosis also exhibited decreased cognitive functioning. CONCLUSIONS: These findings demonstrate for the first time an association between increasing birth order and variability in ASD clinical phenotypes at diagnosis, with potential evidence of reproductive curtailment in children without siblings. Taken together, these findings have significant implications for advancing understanding about the potential mechanisms that contribute to heterogeneity in ASD clinical presentations as a function of birth order and family size. En ligne : http://dx.doi.org/10.1111/jcpp.13349 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456

The misnomer of 'high functioning autism': Intelligence is an imprecise predictor of functional abilities at diagnosis / Gail A. ALVARES in Autism, 24-1 (January 2020)  

Public ISBD [article]  inAutism > 24-1 (January 2020) . - p.221-232 Titre : The misnomer of 'high functioning autism': Intelligence is an imprecise predictor of functional abilities at diagnosis Type de document : Texte imprimé et/ou numérique Auteurs : Gail A. ALVARES, Auteur ; Keely BEBBINGTON, Auteur ; D. CLEARY, Auteur ; K. EVANS, Auteur ; E. J. GLASSON, Auteur ; M. T. MAYBERY, Auteur ; S. PILLAR, Auteur ; M. ULJAREVIC, Auteur ; Kandice J. VARCIN, Auteur ; J. WRAY, Auteur ; Andrew J. O. WHITEHOUSE, Auteur Article en page(s) : p.221-232 Langues : Anglais (eng) Mots-clés : adaptive behaviour  autism spectrum disorders  cognitive impairment  intellectual disability Index. décimale : PER Périodiques Résumé : 'High functioning autism' is a term often used for individuals with autism spectrum disorder without an intellectual disability. Over time, this term has become synonymous with expectations of greater functional skills and better long-term outcomes, despite contradictory clinical observations. This study investigated the relationship between adaptive behaviour, cognitive estimates (intelligence quotient) and age at diagnosis in autism spectrum disorder. Participants (n = 2225, 1-18 years of age) were notified at diagnosis to a prospective register and grouped by presence (n = 1041) or absence (n = 1184) of intellectual disability. Functional abilities were reported using the Vineland Adaptive Behaviour Scales. Regression models suggested that intelligence quotient was a weak predictor of Vineland Adaptive Behaviour Scales after controlling for sex. Whereas the intellectual disability group's adaptive behaviour estimates were close to reported intelligence quotients, Vineland Adaptive Behaviour Scales scores fell significantly below intelligence quotients for children without intellectual disability. The gap between intelligence quotient and Vineland Adaptive Behaviour Scales scores remained large with increasing age at diagnosis for all children. These data indicate that estimates from intelligence quotient alone are an imprecise proxy for functional abilities when diagnosing autism spectrum disorder, particularly for those without intellectual disability. We argue that 'high functioning autism' is an inaccurate clinical descriptor when based solely on intelligence quotient demarcations and this term should be abandoned in research and clinical practice. En ligne : http://dx.doi.org/10.1177/1362361319852831 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=414 [article] The misnomer of 'high functioning autism': Intelligence is an imprecise predictor of functional abilities at diagnosis [Texte imprimé et/ou numérique] / Gail A. ALVARES, Auteur ; Keely BEBBINGTON, Auteur ; D. CLEARY, Auteur ; K. EVANS, Auteur ; E. J. GLASSON, Auteur ; M. T. MAYBERY, Auteur ; S. PILLAR, Auteur ; M. ULJAREVIC, Auteur ; Kandice J. VARCIN, Auteur ; J. WRAY, Auteur ; Andrew J. O. WHITEHOUSE, Auteur . - p.221-232. Langues : Anglais (eng) in Autism > 24-1 (January 2020) . - p.221-232 Mots-clés : adaptive behaviour  autism spectrum disorders  cognitive impairment  intellectual disability Index. décimale : PER Périodiques Résumé : 'High functioning autism' is a term often used for individuals with autism spectrum disorder without an intellectual disability. Over time, this term has become synonymous with expectations of greater functional skills and better long-term outcomes, despite contradictory clinical observations. This study investigated the relationship between adaptive behaviour, cognitive estimates (intelligence quotient) and age at diagnosis in autism spectrum disorder. Participants (n = 2225, 1-18 years of age) were notified at diagnosis to a prospective register and grouped by presence (n = 1041) or absence (n = 1184) of intellectual disability. Functional abilities were reported using the Vineland Adaptive Behaviour Scales. Regression models suggested that intelligence quotient was a weak predictor of Vineland Adaptive Behaviour Scales after controlling for sex. Whereas the intellectual disability group's adaptive behaviour estimates were close to reported intelligence quotients, Vineland Adaptive Behaviour Scales scores fell significantly below intelligence quotients for children without intellectual disability. The gap between intelligence quotient and Vineland Adaptive Behaviour Scales scores remained large with increasing age at diagnosis for all children. These data indicate that estimates from intelligence quotient alone are an imprecise proxy for functional abilities when diagnosing autism spectrum disorder, particularly for those without intellectual disability. We argue that 'high functioning autism' is an inaccurate clinical descriptor when based solely on intelligence quotient demarcations and this term should be abandoned in research and clinical practice. En ligne : http://dx.doi.org/10.1177/1362361319852831 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=414

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