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Autism Spectrum Disorder

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https://www.readbyqxmd.com/read/28449247/informant-discrepancy-defines-discrete-clinically-useful-autism-spectrum-disorder-subgroups
#1
Matthew D Lerner, Andres De Los Reyes, Deborah A G Drabick, Alan H Gerber, Kenneth D Gadow
BACKGROUND: Discrepancy between informants (parents and teachers) in severity ratings of core symptoms commonly arise when assessing autism spectrum disorder (ASD). Whether such discrepancy yields unique information about the ASD phenotype and its clinical correlates has not been examined. We examined whether degree of discrepancy between parent and teacher ASD symptom ratings defines discrete, clinically meaningful subgroups of youth with ASD using an efficient, cost-effective procedure...
April 27, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28448695/long-term-memory-in-older-children-adolescents-and-adults-with-autism-spectrum-disorder
#2
Diane L Williams, Nancy J Minshew, Gerald Goldstein, Carla A Mazefsky
This study extends prior memory reports in autism spectrum disorders (ASD) by investigating memory for narratives after longer recall periods and by examining developmental aspects of narrative memory using a cross-sectional design. Forty-seven older children/adolescents with ASD and 31 youth with typical development (TD) and 39 adults with ASD and 45 TD adults were compared on memory for stories from standardized measures appropriate for each age group at three intervals (immediate, 30 min, and 2 day). Both the youth with and without ASD had difficulty with memory for story details with increasing time intervals...
April 27, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28448694/the-joint-effect-of-air-pollution-exposure-and-copy-number-variation-on-risk-for-autism
#3
Dokyoon Kim, Heather Volk, Santhosh Girirajan, Sarah Pendergrass, Molly A Hall, Shefali S Verma, Rebecca J Schmidt, Robin L Hansen, Debashis Ghosh, Yunin Ludena-Rodriguez, Kyoungmi Kim, Marylyn D Ritchie, Irva Hertz-Picciotto, Scott B Selleck
Autism spectrum disorder is a complex trait with a high degree of heritability as well as documented susceptibility from environmental factors. In this study the contributions of copy number variation, exposure to air pollutants, and the interaction between the two on autism risk, were evaluated in the population-based case-control Childhood Autism Risks from Genetics and Environment (CHARGE) Study. For the current investigation, we included only those CHARGE children (a) who met criteria for autism or typical development and (b) for whom our team had conducted both genetic evaluation of copy number burden and determination of environmental air pollution exposures based on mapping addresses from the pregnancy and early childhood...
April 27, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28448681/autism-too-eager-to-learn-event-related-potential-findings-of-increased-dependency-on-intentional-learning-in-a-serial-reaction-time-task
#4
Fenny S Zwart, Constance W Th M Vissers, Roemer van der Meij, Roy P C Kessels, Joseph H R Maes
It has been suggested that people with autism spectrum disorder (ASD) have an increased tendency to use explicit (or intentional) learning strategies. This altered learning may play a role in the development of the social communication difficulties characterizing ASD. In the current study, we investigated incidental and intentional sequence learning using a Serial Reaction Time (SRT) task in an adult ASD population. Response times and event related potentials (ERP) components (N2b and P3) were assessed as indicators of learning and knowledge...
April 27, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28448225/online-positive-thinking-training-intervention-for-caregivers-of-individuals-with-asd-necessity-acceptability-and-feasibility
#5
Abir K Bekhet
BACKGROUND: More than 3.5 million people in the United States are diagnosed with autism spectrum disorder (ASD). Caring for children with ASD can be stressful and can be detrimental to the well-being of the caregivers (CGs). However, the adverse effects of caregiving on the well-being of CGs may be avoided with appropriate interventions. CGs of persons with ASD might benefit from a positive thinking training (PTT) intervention to help them cope with the stress of caregiving. However, the necessity, acceptability and feasibility for PTT in ASD CGs have not been studied...
May 2017: Issues in Mental Health Nursing
https://www.readbyqxmd.com/read/28448061/grand-maternal-smoking-in-pregnancy-and-grandchild-s-autistic-traits-and-diagnosed-autism
#6
Jean Golding, Genette Ellis, Steven Gregory, Karen Birmingham, Yasmin Iles-Caven, Dheeraj Rai, Marcus Pembrey
Although there is considerable research into the genetic background of autism spectrum disorders, environmental factors are likely to contribute to the variation in prevalence over time. Rodent experiments indicate that environmental exposures can have effects on subsequent generations, and human studies indicate that parental prenatal exposures may play a part in developmental variation. Here we use the Avon Longitudinal Study of Parents and Children (ALSPAC) to test the hypothesis that if the mother or father (F1) had been exposed to their own mother's (F0) smoking during pregnancy, the offspring (F2) would be at increased risk of autism...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28447306/the-effects-of-early-language-on-age-at-diagnosis-and-functioning-at-school-age-in-children-with-autism-spectrum-disorder
#7
Anthony Goodwin, Nicole L Matthews, Christopher J Smith
Research suggests that toddlers with no language delay (NLD) should have better outcomes than those with language delay (LD). However, the predictive utility of language milestones relative to co-varying factors such as age at diagnosis, IQ, and ASD symptomatology is unclear. This study compared school-aged children with ASD and NLD (n = 59) to a well-matched group with ASD and LD (n = 59). The LD group was diagnosed at younger ages and their historical ASD symptoms were more severe than the NLD group...
April 26, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28447305/a-discrepancy-in-comprehension-and-production-in-early-language-development-in-asd-is-it-clinically-relevant
#8
Meghan M Davidson, Susan Ellis Weismer
This study examined the extent to which a discrepant comprehension-production profile (i.e., relatively more delayed comprehension than production) is characteristic of the early language phenotype in autism spectrum disorders (ASD) and tracked the developmental progression of the profile. Our findings indicated that a discrepant comprehension-production profile distinguished toddlers (30 months) with ASD from late talkers without ASD (91% sensitivity, 100% specificity) in groups that were comparable on expressive language, age, and socioeconomic status...
April 26, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28447303/brief-report-metformin-for-antipsychotic-induced-weight-gain-in-youth-with-autism-spectrum-disorder
#9
Logan K Wink, Ryan Adams, Ernest V Pedapati, Kelli C Dominick, Emma Fox, Catherine Buck, Craig A Erickson
Antipsychotic treatment in youth with autism spectrum disorder (ASD) is becoming increasingly common, placing individuals at risk for antipsychotic-induced weight gain and associated complications. Metformin hydrochloride, a biguanide medication FDA-approved for treatment of type-2 diabetes in youth, may hold promise for treatment of antipsychotic-induced weight gain in youth with ASD. In this report we assess the long-term impact of metformin on antipsychotic-associated weight gain in a naturalistic sample of 53 youth with ASD...
April 26, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28447268/atypical-age-dependency-of-executive-function-and-white-matter-microstructure-in-children-and-adolescents-with-autism-spectrum-disorders
#10
Kenia Martínez, Jessica Merchán-Naranjo, Laura Pina-Camacho, Yasser Alemán-Gómez, Leticia Boada, David Fraguas, Carmen Moreno, Celso Arango, Joost Janssen, Mara Parellada
Executive function (EF) performance is associated with measurements of white matter microstructure (WMS) in typical individuals. Impaired EF is a hallmark symptom of autism spectrum disorders (ASD) but it is unclear how impaired EF relates to variability in WMS. Twenty-one male youth (8-18 years) with ASD and without intellectual disability and twenty-one typical male participants (TP) matched for age, intelligence quotient, handedness, race and parental socioeconomic status were recruited. Five EF domains were assessed and several DTI-based measurements of WMS [fractional anisotropy (FA), mean diffusivity (MD) and radial diffusivity (RD)] were estimated for eighteen white matter tracts...
April 26, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28447214/eeg-abnormalities-and-long-term-seizure-outcome-in-high-functioning-autism
#11
Özdem Ertürk Çetin, Barış Korkmaz, Gülce Alev, Veysi Demirbilek
Electroencephalographic abnormalities may occur in autistic spectrum disorders (ASD) even in the absence of clinical seizures. These abnormalities may vary from nonspecific changes to epileptiform abnormalities and are more common compared to the overall population. The level of intelligence is a significant risk factor for epilepsy in ASD. However, the relation between the functionality of the individuals with autism and the electroencephalographic (EEG) abnormalities, and the clinical significance of these abnormalities still remain relatively unclear...
April 26, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28446959/gestational-vitamin-d-deficiency-and-autism-spectrum-disorder
#12
Anna A E Vinkhuyzen, Darryl W Eyles, Thomas H J Burne, Laura M E Blanken, Claudia J Kruithof, Frank Verhulst, Tonya White, Vincent W Jaddoe, Henning Tiemeier, John J McGrath
BACKGROUND: There is growing interest in linking vitamin D deficiency with autism spectrum disorders (ASDs). The association between vitamin D deficiency during gestation, a critical period in neurodevelopment, and ASD is not well understood. AIMS: To determine the association between gestational vitamin D status and ASD. METHOD: Based on a birth cohort (n=4334), we examined the association between 25-hydroxyvitamin D (25OHD), assessed from both maternal mid-gestation sera and neonatal sera, and ASD (defined by clinical records; n=68 cases)...
March 2017: BJPsych Open
https://www.readbyqxmd.com/read/28446869/fnirs-studies-on-hemispheric-asymmetry-in-atypical-neural-function-in-developmental-disorders
#13
REVIEW
Hirokazu Doi, Kazuyuki Shinohara
Functional lateralization is highly replicable trait of human neural system. Many previous studies have indicated the possibility that people with attention-deficits/hyperactivity-disorder (ADHD) and autism spectrum disorder (ASD) show hemispheric asymmetry in atypical neural function. However, despite the abundance of relevant studies, there is still ongoing controversy over this issue. In the present mini-review, we provide an overview of the hemispheric asymmetry in atypical neural function observed in fNIRS studies on people with these conditions...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28444476/assessing-the-dim-light-melatonin-onset-in-adults-with-autism-spectrum-disorder-and-no-comorbid-intellectual-disability
#14
Emma K Baker, Amanda L Richdale, Agnes Hazi, Luke A Prendergast
This study assessed melatonin levels and the dim light melatonin onset (DLMO) in adults with Autism Spectrum Disorder (ASD) and also investigated the relationships between melatonin and objectively measured sleep parameters. Sixteen adults with ASD (ASD-Only), 12 adults with ASD medicated for comorbid diagnoses of anxiety and/or depression (ASD-Med) and 32 controls participated in the study. Although, the timing of the DLMO did not differ between the two groups, advances and delays of the melatonin rhythm were observed in individual profiles...
April 26, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28442991/a-novel-long-non-coding-rna-durga-modulates-dendrite-density-and-expression-of-kalirin-in-zebrafish
#15
Mayuresh A Sarangdhar, Divya Chaubey, Abhishek Bhatt, Monisha Km, Manish Kumar, Shashi Ranjan, Beena Pillai
Kalirin, a key player in axonal development, nerve growth and synaptic re-modeling, is implicated in many pathological conditions like schizophrenia and autism-spectrum disorders. Alternative promoters and splicing lead to functionally distinct isoforms, but the post-transcriptional regulation of Kalirin has not been studied. Here, we report a novel non-coding RNA, which we name durga, arising from the first exon of kalirin a (kalrna) in the antisense orientation in zebrafish. The kalrna and durga transcripts are barely detectable during early development, but steadily increase by 24 hours post-fertilization (hpf) as the brain develops...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28439889/prevalence-and-characteristics-of-autism-spectrum-disorders-in-children-with-cerebral-palsy
#16
Malika Delobel-Ayoub, Dana Klapouszczak, Marit Maria Elisabeth van Bakel, Karen Horridge, Solveig Sigurdardottir, Kate Himmelmann, Catherine Arnaud
AIM: To evaluate the prevalence of co-occurring autism spectrum disorders (ASDs) among children with cerebral palsy (CP), and to describe their characteristics. METHOD: The data of 1225 CP cases from four population-based registers (Iceland, Sweden, and two in France) and one population-based surveillance programme (North East England, UK) participating in the Surveillance of Cerebral Palsy in Europe Network (SCPE) were analysed. The ASD diagnoses were systematically recorded using category F84 of the International Classification of Diseases, 10th Revision...
April 25, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28439605/effectiveness-of-a-preparatory-aid-in-facilitating-oral-assessment-in-a-group-of-saudi-children-with-autism-spectrum-disorders-in-central-saudi-arabia
#17
Ebtissam Z Murshid
To evaluate the effectiveness of a specially-designed dental book (preparatory aid) on the behavior of a group of Autism Spectrum Disorder (ASD) Saudi children during their first dental visit to the College of Dentistry, King Saud University, Riyadh, Saudi Arabia. Methods: A cross-sectional double-blinded pre-and post clinical study consisting of 2 parts; a survey targeting the parents, and a clinical oral examination of their ASD children was conducted between January and June of 2016.  Results: A total of 40 children (75% males and 25% females) with an average age of 6...
May 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28439105/autism-spectrum-disorders-a-meta-analysis-of-executive-function
#18
E A Demetriou, A Lampit, D S Quintana, S L Naismith, Y J C Song, J E Pye, I Hickie, A J Guastella
Evidence of executive dysfunction in autism spectrum disorders (ASD) across development remains mixed and establishing its role is critical for guiding diagnosis and intervention. The primary objectives of this meta-analysis is to analyse executive function (EF) performance in ASD, the fractionation across EF subdomains, the clinical utility of EF measures and the influence of multiple moderators (for example, age, gender, diagnosis, measure characteristics). The Embase, Medline and PsychINFO databases were searched to identify peer-reviewed studies published since the inclusion of Autism in DSM-III (1980) up to end of June 2016 that compared EF in ASD with neurotypical controls...
April 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28439102/mecp2-regulated-mirnas-control-early-human-neurogenesis-through-differential-effects-on-erk-and-akt-signaling
#19
N Mellios, D A Feldman, S D Sheridan, J P K Ip, S Kwok, S K Amoah, B Rosen, B A Rodriguez, B Crawford, R Swaminathan, S Chou, Y Li, M Ziats, C Ernst, R Jaenisch, S J Haggarty, M Sur
Rett syndrome (RTT) is an X-linked, neurodevelopmental disorder caused primarily by mutations in the methyl-CpG-binding protein 2 (MECP2) gene, which encodes a multifunctional epigenetic regulator with known links to a wide spectrum of neuropsychiatric disorders. Although postnatal functions of MeCP2 have been thoroughly investigated, its role in prenatal brain development remains poorly understood. Given the well-established importance of microRNAs (miRNAs) in neurogenesis, we employed isogenic human RTT patient-derived induced pluripotent stem cell (iPSC) and MeCP2 short hairpin RNA knockdown approaches to identify novel MeCP2-regulated miRNAs enriched during early human neuronal development...
April 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28438881/prevalence-of-congenital-cytomegalovirus-infection-assessed-through-viral-genome-detection-in-dried-blood-spots-in-children-with-autism-spectrum-disorders
#20
Ivan Gentile, Emanuela Zappulo, Maria Pia Riccio, Sandro Binda, Laura Bubba, Laura Pellegrinelli, Domenico Scognamiglio, Francesca Operto, Lucia Margari, Guglielmo Borgia, Carmela Bravaccio
BACKGROUND/AIM: Autism spectrum disorders (ASD) are neurodevelopmental disorders without a definitive etiology in most cases. Environmental factors, such as viral infections, have been linked with anomalies in brain growth, neuronal development, and functional connectivity. Congenital cytomegalovirus (CMV) infection has been associated with the onset of ASD in several case reports. The aim of this study was to evaluate the prevalence of congenital CMV infection in children with ASD and in healthy controls...
May 2017: In Vivo
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