Region-specific associations between gamma-aminobutyric acid A receptor binding and cortical thickness in high-functioning autistic adults / David JAMES in Autism Research, 15-6 (June 2022)  

Public ISBD [article]  inAutism Research > 15-6 (June 2022) . - p.1068-1082 Titre : Region-specific associations between gamma-aminobutyric acid A receptor binding and cortical thickness in high-functioning autistic adults Type de document : texte imprimé Auteurs : David JAMES, Auteur ; Vicky T. LAM, Auteur ; Booil JO, Auteur ; Lawrence K. FUNG, Auteur Article en page(s) : p.1068-1082 Langues : Anglais (eng) Mots-clés : Adult  Autism Spectrum Disorder  Autistic Disorder/diagnostic imaging/pathology  Brain/pathology  Brain Mapping/methods  Female  Humans  Magnetic Resonance Imaging/methods  Male  gamma-Aminobutyric Acid  GABAA receptor density  autism  cortical thickness  postcentral gyrus Index. décimale : PER Périodiques Résumé : The neurobiology of autism has been shown to involve alterations in cortical morphology and gamma-aminobutyric acid A (GABA(A) ) receptor density. We hypothesized that GABA(A) receptor binding potential (GABA(A) R BP(ND) ) would correlate with cortical thickness, but their correlations would differ between autistic adults and typically developing (TD) controls. We studied 50 adults (23 autism, 27 TD, mean age of 27 years) using magnetic resonance imaging to measure cortical thickness, and [(18) F]flumazenil positron emission tomography imaging to measure GABA(A) R BP(ND) . We determined the correlations between cortical thickness and GABA(A) R BP(ND) by cortical lobe, region-of-interest, and diagnosis of autism spectrum disorder (ASD). We also explored potential sex differences in the relationship between cortical thickness and autism characteristics, as measured by autism spectrum quotient (AQ) scores. Comparing autism and TD groups, no significant differences were found in cortical thickness or GABA(A) R BP(ND) . In both autism and TD groups, a negative relationship between cortical thickness and GABA(A) R BP(ND) was observed in the frontal and occipital cortices, but no relationship was found in the temporal or limbic cortices. A positive correlation was seen in the parietal cortex that was only significant for the autism group. Interestingly, in an exploratory analysis, we found sex differences in the relationships between cortical thickness and GABA(A) R BP(ND) , and cortical thickness and AQ scores in the left postcentral gyrus. LAY SUMMARY: The thickness of the brain cortex and the density of the receptors associated with inhibitory neurotransmitter GABA have been hypothesized to underlie the neurobiology of autism. In this study, we found that these biomarkers correlate positively in the parietal cortex, but negatively in the frontal and occipital cortical regions of the brain. Furthermore, we collected preliminary evidence that the correlations between cortical thickness and GABA receptor density are sexdependent in a brain region where sensory inputs are registered. En ligne : http://dx.doi.org/10.1002/aur.2703 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=476 [article] Region-specific associations between gamma-aminobutyric acid A receptor binding and cortical thickness in high-functioning autistic adults [texte imprimé] / David JAMES, Auteur ; Vicky T. LAM, Auteur ; Booil JO, Auteur ; Lawrence K. FUNG, Auteur . - p.1068-1082. Langues : Anglais (eng) in Autism Research > 15-6 (June 2022) . - p.1068-1082 Mots-clés : Adult  Autism Spectrum Disorder  Autistic Disorder/diagnostic imaging/pathology  Brain/pathology  Brain Mapping/methods  Female  Humans  Magnetic Resonance Imaging/methods  Male  gamma-Aminobutyric Acid  GABAA receptor density  autism  cortical thickness  postcentral gyrus Index. décimale : PER Périodiques Résumé : The neurobiology of autism has been shown to involve alterations in cortical morphology and gamma-aminobutyric acid A (GABA(A) ) receptor density. We hypothesized that GABA(A) receptor binding potential (GABA(A) R BP(ND) ) would correlate with cortical thickness, but their correlations would differ between autistic adults and typically developing (TD) controls. We studied 50 adults (23 autism, 27 TD, mean age of 27 years) using magnetic resonance imaging to measure cortical thickness, and [(18) F]flumazenil positron emission tomography imaging to measure GABA(A) R BP(ND) . We determined the correlations between cortical thickness and GABA(A) R BP(ND) by cortical lobe, region-of-interest, and diagnosis of autism spectrum disorder (ASD). We also explored potential sex differences in the relationship between cortical thickness and autism characteristics, as measured by autism spectrum quotient (AQ) scores. Comparing autism and TD groups, no significant differences were found in cortical thickness or GABA(A) R BP(ND) . In both autism and TD groups, a negative relationship between cortical thickness and GABA(A) R BP(ND) was observed in the frontal and occipital cortices, but no relationship was found in the temporal or limbic cortices. A positive correlation was seen in the parietal cortex that was only significant for the autism group. Interestingly, in an exploratory analysis, we found sex differences in the relationships between cortical thickness and GABA(A) R BP(ND) , and cortical thickness and AQ scores in the left postcentral gyrus. LAY SUMMARY: The thickness of the brain cortex and the density of the receptors associated with inhibitory neurotransmitter GABA have been hypothesized to underlie the neurobiology of autism. In this study, we found that these biomarkers correlate positively in the parietal cortex, but negatively in the frontal and occipital cortical regions of the brain. Furthermore, we collected preliminary evidence that the correlations between cortical thickness and GABA receptor density are sexdependent in a brain region where sensory inputs are registered. En ligne : http://dx.doi.org/10.1002/aur.2703 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=476

The cognitive developmental profile associated with fragile X syndrome: A longitudinal investigation of cognitive strengths and weaknesses through childhood and adolescence / Eve-Marie QUINTIN in Development and Psychopathology, 28-4 pt2 (November 2016)  

Public ISBD [article]  inDevelopment and Psychopathology > 28-4 pt2 (November 2016) . - p.1457-1469 Titre : The cognitive developmental profile associated with fragile X syndrome: A longitudinal investigation of cognitive strengths and weaknesses through childhood and adolescence Type de document : texte imprimé Auteurs : Eve-Marie QUINTIN, Auteur ; Booil JO, Auteur ; Scott S. HALL, Auteur ; Jennifer L. BRUNO, Auteur ; Lindsay C. CHROMIK, Auteur ; Mira M. RAMAN, Auteur ; Amy A. LIGHTBODY, Auteur ; Arianna MARTIN, Auteur ; Allan L. REISS, Auteur Article en page(s) : p.1457-1469 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Few studies have investigated developmental strengths and weaknesses within the cognitive profile of children and adolescents with fragile X syndrome (FXS), a single-gene cause of inherited intellectual impairment. With a prospective longitudinal design and using normalized raw scores (Z scores) to circumvent floor effects, we measured cognitive functioning of 184 children and adolescents with FXS (ages 6 to 16) using the Wechsler Scale of Intelligence for Children on one to three occasions for each participant. Participants with FXS received lower raw scores relative to the Wechsler Scale of Intelligence for Children normative sample across the developmental period. Verbal comprehension, perceptual organization, and processing speed Z scores were marked by a widening gap from the normative sample, while freedom from distractibility Z scores showed a narrowing gap. Key findings include a relative strength for verbal skills in comparison with visuospatial–constructive skills arising in adolescence and a discrepancy between working memory (weakness) and processing speed (strength) in childhood that diminishes in adolescence. Results suggest that the cognitive profile associated with FXS develops dynamically from childhood to adolescence. Findings are discussed within the context of aberrant brain morphology in childhood and maturation in adolescence. We argue that assessing disorder-specific cognitive developmental profiles will benefit future disorder-specific treatment research. En ligne : http://dx.doi.org/10.1017/s0954579415001200 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=294 [article] The cognitive developmental profile associated with fragile X syndrome: A longitudinal investigation of cognitive strengths and weaknesses through childhood and adolescence [texte imprimé] / Eve-Marie QUINTIN, Auteur ; Booil JO, Auteur ; Scott S. HALL, Auteur ; Jennifer L. BRUNO, Auteur ; Lindsay C. CHROMIK, Auteur ; Mira M. RAMAN, Auteur ; Amy A. LIGHTBODY, Auteur ; Arianna MARTIN, Auteur ; Allan L. REISS, Auteur . - p.1457-1469. Langues : Anglais (eng) in Development and Psychopathology > 28-4 pt2 (November 2016) . - p.1457-1469 Index. décimale : PER Périodiques Résumé : Few studies have investigated developmental strengths and weaknesses within the cognitive profile of children and adolescents with fragile X syndrome (FXS), a single-gene cause of inherited intellectual impairment. With a prospective longitudinal design and using normalized raw scores (Z scores) to circumvent floor effects, we measured cognitive functioning of 184 children and adolescents with FXS (ages 6 to 16) using the Wechsler Scale of Intelligence for Children on one to three occasions for each participant. Participants with FXS received lower raw scores relative to the Wechsler Scale of Intelligence for Children normative sample across the developmental period. Verbal comprehension, perceptual organization, and processing speed Z scores were marked by a widening gap from the normative sample, while freedom from distractibility Z scores showed a narrowing gap. Key findings include a relative strength for verbal skills in comparison with visuospatial–constructive skills arising in adolescence and a discrepancy between working memory (weakness) and processing speed (strength) in childhood that diminishes in adolescence. Results suggest that the cognitive profile associated with FXS develops dynamically from childhood to adolescence. Findings are discussed within the context of aberrant brain morphology in childhood and maturation in adolescence. We argue that assessing disorder-specific cognitive developmental profiles will benefit future disorder-specific treatment research. En ligne : http://dx.doi.org/10.1017/s0954579415001200 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=294

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