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Autism Research: Official Journal of the International Society for Autism Research

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https://www.readbyqxmd.com/read/28509388/proteomic-explorations-of-autism-spectrum-disorder
#1
Nicholas Szoko, Adam J McShane, Marvin R Natowicz
Proteomics, the large-scale study of protein expression in cells and tissues, is a powerful tool to study the biology of clinical conditions and has provided significant insights in many experimental systems. Herein, we review the basics of proteomic methodology and discuss challenges in using proteomic approaches to study autism. Unlike other experimental approaches, such as genomic approaches, there have been few large-scale studies of proteins in tissues from persons with autism. Most of the proteomic studies on autism used blood or other peripheral tissues; few studies used brain tissue...
May 16, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28503904/white-matter-compromise-in-autism-differentiating-motion-confounds-from-true-differences-in-diffusion-tensor-imaging
#2
Seraphina K Solders, Ruth A Carper, Ralph-Axel Müller
Common findings from diffusion tensor imaging (DTI) in autism spectrum disorder (ASD) include reduced fractional anisotropy (FA), and increased mean and radial diffusivity (MD, RD) of white matter tracts. However, findings may be confounded by head motion. We examined how group-level motion matching affects DTI comparisons between ASD and typically developing (TD) groups. We included 57 ASD and 50 TD participants, comparing three subsets at increasing levels of motion-matching stringency: full sample (FS); quality-controlled (QC); and quantitatively-matched (QM)...
May 15, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28474512/atypical-perception-in-autism-a-failure-of-perceptual-specialization
#3
Bat Sheva Hadad, Eugenia K Goldstein, Natalie N Russo
We examined whether reduced perceptual specialization underlies atypical perception in autism spectrum disorder (ASD) testing classifications of stimuli that differ either along integral dimensions (prototypical integral dimensions of value and chroma), or along separable dimensions (prototypical separable dimensions of value and size). Current models of the perception of individuals with an ASD would suggest that on these tasks, individuals with ASD would be as, or more, likely to process dimensions as separable, regardless of whether they represented separable or integrated dimensions...
May 5, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28474493/identifying-the-clinical-needs-and-patterns-of-health-service-use-of-adolescent-girls-and-women-with-autism-spectrum-disorder
#4
Ami Tint, Jonathan A Weiss, Yona Lunsky
Girls and women in the general population present with a distinct profile of clinical needs and use more associated health services compared to boys and men; however, research focused on health service use patterns among girls and women with Autism Spectrum Disorder (ASD) is limited. In the current study, caregivers of 61 adolescent girls and women with ASD and 223 boys and men with ASD completed an online survey. Descriptive analyses were conducted to better understand the clinical needs and associated service use patterns of girls and women with ASD...
May 5, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28474389/developmental-functioning-and-medical-co-morbidity-profile-of-children-with-complex-and-essential-autism
#5
Jaimie Flor, Jayne Bellando, Maya Lopez, Amy Shui
Children with Autism Spectrum Disorders (ASD) may be characterized as "complex" (those with microcephaly and/or dysmorphology) or "essential" (those with neither of these two). Previous studies found subjects in the complex group exhibited lower IQ scores, poorer response to behavioral intervention, more seizures and more abnormal EEGs and brain MRIs compared to the essential group. The objective of this study was to determine if there are differences in complex versus essential subjects based on several developmental/psychological measures as well as certain medical comorbidities...
May 5, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28464438/social-skills-training-for-children-with-autism-spectrum-disorder-using-a-robotic-behavioral-intervention-system
#6
Sang-Seok Yun, JongSuk Choi, Sung-Kee Park, Gui-Young Bong, HeeJeong Yoo
We designed a robot system that assisted in behavioral intervention programs of children with autism spectrum disorder (ASD). The eight-session intervention program was based on the discrete trial teaching protocol and focused on two basic social skills: eye contact and facial emotion recognition. The robotic interactions occurred in four modules: training element query, recognition of human activity, coping-mode selection, and follow-up action. Children with ASD who were between 4 and 7 years old and who had verbal IQ ≥ 60 were recruited and randomly assigned to the treatment group (TG, n = 8, 5...
May 2, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28448695/long-term-memory-in-older-children-adolescents-and-adults-with-autism-spectrum-disorder
#7
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
#8
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
#9
Fenny S Zwart, Constance Th W 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/28432743/global-and-local-visual-processing-in-autism-an-objective-assessment-approach
#10
Kritika Nayar, Angela C Voyles, Lynne Kiorpes, Adriana Di Martino
We examined global and local visual processing in autism spectrum disorder (ASD) via a match-to-sample task using Kanizsa illusory contours (KIC). School-aged children with ASD (n = 28) and age-matched typically developing controls (n = 22; 7-13 years) performed a sequential match-to-sample between a solid shape (sample) and two illusory alternatives. We tracked eye gaze and behavioral performance in two task conditions: one with and one without local interference from background noise elements. While analyses revealed lower accuracy and longer reaction time in ASD in the condition with local interference only, eye tracking robustly captured ASD-related global atypicalities across both conditions...
April 22, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28419785/internal-noise-estimates-correlate-with-autistic-traits
#11
Greta Vilidaite, Miaomiao Yu, Daniel H Baker
Previous neuroimaging research has reported increased internal (neural) noise in sensory systems of autistic individuals. However, it is unclear if this difference has behavioural or perceptual consequences, as previous attempts at measuring internal noise in ASD psychophysically have been indirect. Here, we use a "gold standard" psychophysical double-pass paradigm to investigate the relationship between internal noise and autistic traits in the neurotypical population (n = 43). We measured internal noise in three tasks (contrast perception, facial expression intensity perception, and number summation) to estimate a global internal noise factor using principal components analysis...
April 17, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28419777/micrornas-as-biomarkers-for-psychiatric-disorders-with-a-focus-on-autism-spectrum-disorder-current-progress-in-genetic-association-studies-expression-profiling-and-translational-research
#12
REVIEW
Yubin Hu, Erik A Ehli, Dorret I Boomsma
MicroRNAs (miRNAs) are a group of small noncoding RNA molecules, 18-25 nucleotides in length, which can negatively regulate gene expression at the post-transcriptional level by binding to messenger RNAs. About half of all identified miRNAs in humans are expressed in the brain and display regulatory functions important for many biological processes related to the development of the central nervous system (CNS). Disruptions in miRNA biogenesis and miRNA-target interaction have been related to CNS diseases, including psychiatric disorders...
April 17, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28419775/next-generation-sequencing-mitochondrial-dna-analysis-in-autism-spectrum-disorder
#13
Ashok Patowary, Ryan Nesbitt, Marilyn Archer, Raphael Bernier, Zoran Brkanac
Autism is a complex genetic disorder where both de-novo and inherited genetics factors play a role. Next generation sequencing approaches have been extensively used to identify rare variants associated with autism. To date, all such studies were focused on nuclear genome; thereby leaving the role of mitochondrial DNA (mtDNA) variation in autism unexplored. Recently, analytical tools have been developed to evaluate mtDNA in whole-exome data. We have analyzed the mtDNA sequence derived from whole-exome sequencing in 10 multiplex families...
April 17, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28401739/the-social-communication-questionnaire-for-adults-with-intellectual-disability-scq-aid
#14
Olivia Derks, Manuel Heinrich, Whitney Brooks, Paula Sterkenburg, Jane McCarthy, Lisa Underwood, Tanja Sappok
Autism spectrum disorder (ASD) frequently co-occurs with intellectual disability (ID) and often remains undiagnosed until adulthood. The Social Communication Questionnaire (SCQ) is a widely used measure to screen for ASD. To improve the utility of the SCQ for adults with ID, the aim of this study was to develop an ID-specific and adult appropriate algorithm for the SCQ using a core set of valid items. These items were identified in one sample (N = 226) and further cross-validated in a second, independent sample (N = 225) from Germany, England and the U...
April 12, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28401679/the-role-of-cholesterol-metabolism-and-various-steroid-abnormalities-in-autism-spectrum-disorders-a-hypothesis-paper
#15
REVIEW
Christopher Gillberg, Elisabeth Fernell, Eva Kočovská, Helen Minnis, Thomas Bourgeron, Lucy Thompson, Clare S Allely
Based on evidence from the relevant research literature, we present a hypothesis that there may be a link between cholesterol, vitamin D, and steroid hormones which subsequently impacts on the development of at least some of the "autisms" [Coleman & Gillberg]. Our hypothesis, driven by the peer reviewed literature, posits that there may be links between cholesterol metabolism, which we will refer to as "steroid metabolism" and findings of steroid abnormalities of various kinds (cortisol, testosterone, estrogens, progesterone, vitamin D) in autism spectrum disorder (ASD)...
April 12, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28401674/placebo-like-response-in-absence-of-treatment-in-children-with-autism
#16
Rebecca M Jones, Caroline Carberry, Amarelle Hamo, Catherine Lord
Caregiver report is the most common measure of change in pediatric psychiatry. Yet, placebo response rates pose significant challenges to reliably detect a treatment response. The present study simulated an eight-week clinical trial protocol for Autism Spectrum Disorder (ASD) for the purpose of testing the feasibility and validity of several outcome measures. Twenty caregivers answered questions about their child's behavior on their smartphone each week and completed a battery of paper questionnaires during weeks one and eight...
April 12, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28401654/is-there-sexual-dimorphism-of-hyperserotonemia-in-autism-spectrum-disorder
#17
Lauren C Shuffrey, Stephen J Guter, Shannon Delaney, Suma Jacob, George M Anderson, James S Sutcliffe, Edwin H Cook, Jeremy Veenstra-VanderWeele
Approximately 30% of individuals with autism spectrum disorder (ASD) have elevated whole blood serotonin (5-HT) levels. Genetic linkage and association studies of ASD and of whole blood 5-HT levels as a quantitative trait have revealed sexual dimorphism. Few studies have examined the presence of a sex difference on hyperserotonemia within ASD. To assess whether the rate of hyperserotonemia is different in males than in females with ASD, we measured whole blood 5-HT levels in 292 children and adolescents with ASD, the largest sample in which this biomarker has been assessed...
April 12, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28383189/maternal-hirsutism-and-autism-spectrum-disorders-in-offspring
#18
Brian K Lee, Stefan Arver, Linnea Widman, Renee M Gardner, Cecilia Magnusson, Christina Dalman, Kyriaki Kosidou
Because animal and human studies indicate that androgen exposure can influence neurodevelopment, it has been hypothesized that prenatal exposure to excess androgens may predispose to disorders with male-skewed ratio such as autism spectrum disorders (ASD). Therefore, maternal conditions characterized by hyperandrogenism such as polycystic ovary syndrome (PCOS) or hirsutism may be relevant to child ASD. We previously found in a large Swedish case-control study of 23,748 ASD cases and 208,796 matched controls that PCOS in mothers is associated with increased offspring risk of ASD...
April 6, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28383173/the-childhood-autism-spectrum-test-cast-spanish-adaptation-and-validation
#19
Paula Morales-Hidalgo, Joana Roigé-Castellví, Andreu Vigil-Colet, Josefa Canals Sans
The Childhood Autism Spectrum Test (CAST; Scott et al. Autism 2002; 6:9-31) has proved to be a good test for screening autism spectrum disorders (ASD) and social communication problems. This study provides evidence on the statistical properties of the CAST, specifically its validity, factorial structure and discriminative capacity as an ASD screening test, in a Spanish sample of 4-12 year-old children from community and clinical settings. The study concludes that the test was valid and reliable for ASD screening in Spanish clinical and community populations and allowed us to create a new abbreviated version...
April 6, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28383171/psychophysiological-responses-to-emotions-of-others-in-young-children-with-autism-spectrum-disorders-correlates-of-social-functioning
#20
Gemma Zantinge, Sophie van Rijn, Lex Stockmann, Hanna Swaab
Studying cognitive and affective mechanisms of social behavior could lead to identifying early indicators of derailing social behavior in young children with Autism Spectrum Disorders (ASD). The present study combined sensitive and objective techniques, such as eyetracking and psychophysiology, to provide insight into early neurodevelopmental mechanisms that are more difficult to uncover when relying on behavioral measures. Social attention towards faces and changes in affective arousal were investigated together in 28 young children with ASD (42-75 months) and 45 nonclinical controls (41-81 months)...
April 6, 2017: Autism Research: Official Journal of the International Society for Autism Research
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