1. Atladottir HO, Schendel DE, Henriksen TB, Hjort L, Parner ET. {{Gestational Age and Autism Spectrum Disorder: Trends in Risk Over Time}}. {Autism Res};2015 (Sep 12)
Autism Spectrum Disorder (ASD) is a serious neurodevelopmental disorder. Several previous studies have identified preterm birth as a risk factor for ASD but none has studied whether the association between gestational age and ASD has changed over time. This is a Danish population-based follow-up study including live-born singletons born in Denmark between 1980 and 2009, identified in the Danish Medical Birth Registry, a study population of 1,775,397 children. We used a Cox regression model combined with spline to study the risk for ASD by gestational age across three decades of birth cohorts. We included 19,020 children diagnosed with ASD. Across all birth year cohorts, we found that the risk of being diagnosed with ASD increased with lower gestational age (P-value: <0.01). Across all gestational weeks, we found a statistically significant higher risk estimates in birth cohort 1980 to 1989, compared to birth cohorts 1990 to 1999 and 2000 to 2009, respectively. No statistically significant difference in risk estimates was observed between birth cohort 1990 to 1999 and 2000 to 2009. The observed time trend in risk of ASD after preterm birth may reflect: (1) a change in the risk profile of persons with ASD due to the broadening of ASD diagnostic criteria over time; or (2) improved neonatal care for low GA infants, which has reduced risk of adverse outcomes like ASD in preterm children. Autism Res 2015. (c) 2015 International Society for Autism Research, Wiley Periodicals, Inc.
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2. Carminati GG, Gerber F, Darbellay B, Kosel MM, Deriaz N, Chabert J, Fathi M, Bertschy G, Ferrero F, Carminati F. {{Using venlafaxine to treat behavioral disorders in patients with autism spectrum disorder}}. {Prog Neuropsychopharmacol Biol Psychiatry};2015 (Sep 8)
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3. Chaaya M, Saab D, Maalouf FT, Boustany RM. {{Prevalence of Autism Spectrum Disorder in Nurseries in Lebanon: A Cross Sectional Study}}. {J Autism Dev Disord};2015 (Sep 12)
In Lebanon, no estimate for autism prevalence exists. This cross-sectional study examines the prevalence of Autism spectrum disorder (ASD) in toddlers in nurseries in Beirut and Mount-Lebanon. The final sample included 998 toddlers (16-48 months) from 177 nurseries. We sent parents the Modified Checklist for Autism in Toddlers (M-CHAT) for screening, and a self-administered questionnaire (associated factors). We imputed missing M-CHAT data with successful answers. Since there were no follow-up interviews for the M-CHAT, we used the positive predictive value (0.058) from a large study for prevalence estimates. ASD prevalence was 1 in 66 children (comparable to US). Ratios were: male/female: 1.05; Beirut/Mount-Lebanon: 1.2. Using a more representative sample and ascertaining results are needed for better prevalence estimates in Lebanon.
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4. Dimitrova N, Ozcaliskan S, Adamson LB. {{Parents’ Translations of Child Gesture Facilitate Word Learning in Children with Autism, Down Syndrome and Typical Development}}. {J Autism Dev Disord};2015 (Sep 12)
Typically-developing (TD) children frequently refer to objects uniquely in gesture. Parents translate these gestures into words, facilitating children’s acquisition of these words (Goldin-Meadow et al. in Dev Sci 10(6):778-785, 2007). We ask whether this pattern holds for children with autism (AU) and with Down syndrome (DS) who show delayed vocabulary development. We observed 23 children with AU, 23 with DS, and 23 TD children with their parents over a year. Children used gestures to indicate objects before labeling them and parents translated their gestures into words. Importantly, children benefited from this input, acquiring more words for the translated gestures than the not translated ones. Results highlight the role contingent parental input to child gesture plays in language development of children with developmental disorders.
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5. Fortuna RJ, Robinson L, Smith TH, Meccarello J, Bullen B, Nobis K, Davidson PW. {{Health Conditions and Functional Status in Adults with Autism: A Cross-Sectional Evaluation}}. {J Gen Intern Med};2015 (Sep 11)
BACKGROUND: Children and adolescents with autism spectrum disorder (ASD) have many well-known health concerns, yet health conditions in adults with ASD remain poorly defined. OBJECTIVE: To examine health conditions and functional status in adults with ASD and identify factors associated with health and functional status across age cohorts. DESIGN AND SUBJECTS: We collected cross-sectional data from 255 adult subjects aged 18 to 71 years with ASD using the Rochester Health Status Survey IV (RHSS-IV), a 58-item validated survey instrument. We used the National Health and Nutritional Examination Survey and National Health Interview Survey to provide comparative prevalence rates in the general population. RESULTS: Compared to the general population, young adults aged 18-29 with ASD had a substantially higher prevalence of seizure disorder (11.2 % vs. 1.4 %; p = 0.002), depression (16.4 % vs. 6.4 %; p = 0.007), hypertension (12.9 % vs. 6.3 %; p = 0.05), and allergies (39.7 % vs. 8.4 %; p < 0.001). In contrast, young adults with ASD had considerably lower rates of sexually transmitted illness (STI) (0.9 % vs. 4.3 %; p = 0.03), tobacco use (5.2 % vs. 31.9 %; p < 0.001), and alcohol misuse (0.9 % vs. 11.9 %; p < 0.001). Adults 40 and over with ASD also had higher rates of seizure disorder (29.2 % vs. 1.7 %; p < 0.001), lower tobacco use (2.8 % vs. 24.5 %; p < 0.001), and lower alcohol misuse (1.4 % vs. 18.2 %; p < 0.001) compared to the general population. Amongst the 55 % of participants with a documented IQ score, 91 % had an intellectual disability (IQ < 70). Within the cohort aged 40 years old and older, only 54.2 % were independent with eating, 43.0 % independent with dressing, and 43.1 % independent with bathing. Lower IQ and depression were associated with lower functional status. CONCLUSIONS: Adults with ASD have a high prevalence of seizure disorders and depression, but low rates of STIs, tobacco use, and alcohol misuse. Within our cohort, the majority of older adults with ASD required some assistance with activities of daily living.
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6. Pang EW, Valica T, MacDonald MJ, Taylor MJ, Brian J, Lerch JP, Anagnostou E. {{Abnormal Brain Dynamics Underlie Speech Production in Children with Autism Spectrum Disorder}}. {Autism Res};2015 (Sep 12)
A large proportion of children with autism spectrum disorder (ASD) have speech and/or language difficulties. While a number of structural and functional neuroimaging methods have been used to explore the brain differences in ASD with regards to speech and language comprehension and production, the neurobiology of basic speech function in ASD has not been examined. Magnetoencephalography (MEG) is a neuroimaging modality with high spatial and temporal resolution that can be applied to the examination of brain dynamics underlying speech as it can capture the fast responses fundamental to this function. We acquired MEG from 21 children with high-functioning autism (mean age: 11.43 years) and 21 age- and sex-matched controls as they performed a simple oromotor task, a phoneme production task and a phonemic sequencing task. Results showed significant differences in activation magnitude and peak latencies in primary motor cortex (Brodmann Area 4), motor planning areas (BA 6), temporal sequencing and sensorimotor integration areas (BA 22/13) and executive control areas (BA 9). Our findings of significant functional brain differences between these two groups on these simple oromotor and phonemic tasks suggest that these deficits may be foundational and could underlie the language deficits seen in ASD. Autism Res 2015. (c) 2015 The Authors Autism Research published by Wiley Periodicals, Inc. on behalf of International Society for Autism Research.
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7. Shen Q, Wang G, Li S, Liu X, Lu S, Chen Z, Song K, Yan J, Geng L, Huang Z, Huang W, Chen G, Zhang J. {{ASD v3.0: unraveling allosteric regulation with structural mechanisms and biological networks}}. {Nucleic Acids Res};2015 (Sep 13)
Allosteric regulation, the most direct and efficient way of regulating protein function, is induced by the binding of a ligand at one site that is topographically distinct from an orthosteric site. Allosteric Database (ASD, available online at http://mdl.shsmu.edu.cn/ASD) has been developed to provide comprehensive information featuring allosteric regulation. With increasing data, fundamental questions pertaining to allostery are currently receiving more attention from the mechanism of allosteric changes in an individual protein to the entire effect of the changes in the interconnected network in the cell. Thus, the following novel features were added to this updated version: (i) structural mechanisms of more than 1600 allosteric actions were elucidated by a comparison of site structures before and after the binding of an modulator; (ii) 261 allosteric networks were identified to unveil how the allosteric action in a single protein would propagate to affect downstream proteins; (iii) two of the largest human allosteromes, protein kinases and GPCRs, were thoroughly constructed; and (iv) web interface and data organization were completely redesigned for efficient access. In addition, allosteric data have largely expanded in this update. These updates are useful for facilitating the investigation of allosteric mechanisms, dynamic networks and drug discoveries.
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8. Takahashi H, Komatsu S, Nakahachi T, Ogino K, Kamio Y. {{Relationship of the Acoustic Startle Response and Its Modulation to Emotional and Behavioral Problems in Typical Development Children and Those with Autism Spectrum Disorders}}. {J Autism Dev Disord};2015 (Sep 12)
Auditory hyper-reactivity is a common sensory-perceptual abnormality in autism spectrum disorders (ASD), which interrupts behavioral adaptation. We investigated acoustic startle response (ASR) modulations in 17 children with ASD and 27 with typical development (TD). Compared to TD, children with ASD had larger ASR magnitude to weak stimuli and more prolonged peak startle-latency. We could not find significant difference of prepulse inhibition (PPI) or habituation in ASD children compared to TD. However, habituation and PPI at 70-dB prepulses were negatively related to several subscales of Social Responsiveness Scale and the Strengths and Difficulties Questionnaire, when considering all children. Comprehensive investigation of ASR and its modulation might increase understanding of the neurophysiological impairments underlying ASD and other mental health problems in children.
