1. Barone R, Rizzo R, Tabbi G, Malaguarnera M, Frye RE, Bastin J. {{Nuclear Peroxisome Proliferator-Activated Receptors (PPARs) as Therapeutic Targets of Resveratrol for Autism Spectrum Disorder}}. {International journal of molecular sciences}. 2019; 20(8).
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by defective social communication and interaction and restricted, repetitive behavior with a complex, multifactorial etiology. Despite an increasing worldwide prevalence of ASD, there is currently no pharmacological cure to treat core symptoms of ASD. Clinical evidence and molecular data support the role of impaired mitochondrial fatty acid oxidation (FAO) in ASD. The recognition of defects in energy metabolism in ASD may be important for better understanding ASD and developing therapeutic intervention. The nuclear peroxisome proliferator-activated receptors (PPAR) alpha, delta, and gamma are ligand-activated receptors with distinct physiological functions in regulating lipid and glucose metabolism, as well as inflammatory response. PPAR activation allows a coordinated up-regulation of numerous FAO enzymes, resulting in significant PPAR-driven increases in mitochondrial FAO flux. Resveratrol (RSV) is a polyphenolic compound which exhibits metabolic, antioxidant, and anti-inflammatory properties, pointing to possible applications in ASD therapeutics. In this study, we review the evidence for the existing links between ASD and impaired mitochondrial FAO and review the potential implications for regulation of mitochondrial FAO in ASD by PPAR activators, including RSV.
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2. Bouvet L, Amsellem F, Maruani A, Tonus-Vic Dupont A, Mathieu A, Bourgeron T, Delorme R, Mottron L. {{Synesthesia & autistic features in a large family: Evidence for spatial imagery as a common factor}}. {Behav Brain Res}. 2019; 362: 266-72.
BACKGROUND: Autism and synesthesia are neurodevelopmental conditions associated with variants of perceptual processing. They also share some genetic variants and include a large magnitude of intra-categorical variation: 60 types for synesthesia, as well as a spectrum for autism. In order to investigate the relationship between these two phenomena, we investigated the family of FC, an autistic individual who also possess savant abilities and synesthesia manifestations. METHOD: Autistic symptoms were assessed for the entire sample of participants entering the study (39 individuals) using the SRS. Participants above threshold were evaluated with standardized diagnostic tools. Synesthesia was explored in the entire participating sample using a self-reported questionnaire. Consistency tests were used for participants who reported synesthetic manifestations. RESULTS: In addition to FC, four individuals with ASD were detected. Fifteen participants self-reported synesthesia (15 sequence-space, 4 sound-shape, 4 day-color), among which nine sequence-space synesthetes satisfied the consistency criteria. Two participants possess both autism and synesthesia. CONCLUSION: This family illustrates the co-segregation of autism and synesthesia. This co-segregation is in favour of a partially overlapping genetic predisposition for both conditions, but also authorizes a large variety of manifestations in both conditions. The high prevalence of sequence-space synesthesia in this family strengthens the previous assumption that this form of synesthesia may be linked to autism. We discuss the potential role of spatial imagery in the development of this form of synesthesia and savant abilities.
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3. Cresswell L, Cage E. {{‘Who Am I?’: An Exploratory Study of the Relationships Between Identity, Acculturation and Mental Health in Autistic Adolescents}}. {J Autism Dev Disord}. 2019.
Autistic adolescents are at increased risk of mental health difficulties. One potential factor contributing to this is identity development, although this hypothesis has been little explored. These adolescents also have to consider how autism forms their identity, a process called acculturation. This exploratory study examined the relationships between identity, acculturation and mental health in autistic adolescents. Twenty-four participants completed measures investigating identity, acculturation and mental health. Findings suggested mental health was not related to personal identity. Mental health scores did not differ between acculturation groups, however those aligned to non-autistic culture tended to generate more positive self-statements than those aligned to neither culture. These findings suggest autistic adolescents should be encouraged to explore autistic culture and supported in constructing their identity.
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4. Enav Y, Erhard-Weiss D, Kopelman M, Samson AC, Mehta S, Gross JJ, Hardan AY. {{A non randomized mentalization intervention for parents of children with autism}}. {Autism Res}. 2019.
Parents of children diagnosed with autism spectrum disorder (ASD) report higher levels of stress and other negative affective states than parents of typically developing children. One important resource in managing these heightened levels of negative affect is emotion regulation, which in turn depends upon the ability to recognize and understand one’s own and others’ mental states (referred to as mentalization or reflective functioning). In this study, parents of children with ASD either participated in a mentalization-based group intervention (N = 36) or a delayed treatment (N = 28). Compared to delayed treatment participants, parents in the mentalization-based group had increases in reflective functioning and in the belief that emotions can change. Moreover, they reported decreased behavioral and emotional symptoms in their children, and greater parental self-efficacy. These preliminary findings support previous studies, which have shown that mentalization-based interventions for parents lead to positive outcomes, and suggest that these findings may apply to a diverse population of parents such as those of children with broader autism phenotype or children with different neurological disorders. Further studies to evaluate the effects of the intervention are recommended. Autism Res 2019. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: In this study, parents of children with ASD participated in a group intervention designed to increase their awareness of mental states (their own and their children’s) and to enhance their emotion regulation. Compared to delayed treatment parents, those in the intervention group showed increased awareness of developmental states, and reported increased belief that emotions can change and decreased levels of behavioral and emotional symptoms in their children.
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5. Hadoush H, Alafeef M, Abdulhay E. {{Automated identification for autism severity level: EEG analysis using empirical mode decomposition and second order difference plot}}. {Behav Brain Res}. 2019; 362: 240-8.
BACKGROUND: Previous automated EEG-based diagnosis of autism spectrum disorders (ASD) using various nonlinear EEG analysis methods were limited to distinguish only children with ASD from those normally developed without approaching their autistic features severity. OBJECTIVES: Identifying potential differences between children with mild and sever ASD based on EEG analysis using empirical mode decomposition (EMD) and second-order difference plot (SODP) models, and determining the accuracy of such model outcome measures to distinguish ASD severity levels. METHODS: Resting-state EEG data recorded for 36 children, who divided equally into two matched groups of mild and sever ASD. EMD analysis was applied to their EEG data to identify intrinsic mode functions (IMFs) features, SODP patterns, elliptical area and central tendency measure (CTM) values. Artificial neural network then used to determine the accuracy of this models outcome measures in distinguishing between the two ASD groups. RESULTS: Children with sever ASD showed smaller, less twitches and oscillation of IMFs features, more stochastic SODP plotting, less CTM values, and higher ellipse area values compared to the children with mild ASD, which indicates their greater EEG variabilities and their greater inability to suppress their improper behavior. ANN ended with model sensitivity and specificity of 100% and 94.7%, respectively, and 97.2% overall accuracy of distinguishing between ASD groups. CONCLUSION: Children with sever and mild ASD had different IMFs features, SODP plotting, elliptical area and CTM values. In addition, these EMD outcome measures could serve as a sensitive automated tool to distinguish different severity levels in children with ASD.
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6. Semino S, Zanobini M, Usai MC. {{Visual memory profile in children with high functioning autism}}. {Appl Neuropsychol Child}. 2019: 1-11.
Visual memory in children with high-functioning autism (HFA) is an area of debate. According to the few studies that have examined visual memory in children with autism, the memory profile appears to vary according to the memory process and type of stimuli, and contrasting results may be found. This study aims to analyze the visual memory profile of children with HFA. Fifteen children with HFA (mean age 9.6) and 15 typically developing children (TD; mean age 9.2) matched by chronological age and Leiter-R Brief IQ score took part in the study. Associative and recognition memory as well as visuospatial working memory were assessed. Impairments in face recognition and forward memory were found, whereas associative memory and shape recognition were preserved. The memory profile in children with Autism Spectrum Disorder (ASD) showed relatively stronger abilities in associative memory than in the other visual memory domains. The results support the hypothesis that the level of stimulus processing may influence memory performance by having a large impact on tasks and stimuli that require access to a semantic or global level of processing. In contrast to the TD population, children with ASD may have difficulty extracting underlying regularities from experiences and generalizing that information. Highlights Children with high-functioning autism (HFA) show preserved ability in associative memory and shape recognition. Face recognition appears to be a specific deficit in children with HFA. Associative memory appeared to be the strongest ability in the memory profile of children with autism spectrum disorder (ASD) and typically developing (TD) children.
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7. Smith CJ, Bhanot A, Norman E, Mullett JE, Bilbo SD, McDougle CJ, Zurcher NR, Hooker JM. {{A Protocol for Sedation Free MRI and PET Imaging in Adults with Autism Spectrum Disorder}}. {J Autism Dev Disord}. 2019.
Imaging technologies such as positron emission tomography (PET) and magnetic resonance imaging (MRI) present unparalleled opportunities to investigate the neural basis of autism spectrum disorder (ASD). However, challenges such as deficits in social interaction, anxiety around new experiences, impaired language abilities, and hypersensitivity to sensory stimuli make participating in neuroimaging studies challenging for individuals with ASD. In this commentary, we describe the existent training protocols for preparing individuals with ASD for PET/MRI scans and our own experience developing a training protocol to facilitate the inclusion of low-functioning adults with ASD in PET-MRI studies. We hope to raise awareness of the need for more information exchange between research groups about lessons learned in this context in order to include the entire disease spectrum in neuroimaging studies.
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8. Yu J, Liu X, Zhou J, Xue X, Muenzel M, Schulze PC, Moebius-Winkler S, Keil T, Meng Z, Tang S. {{Long-term safety and efficacy of combined percutaneous LAA and PFO/ASD closure: a single-center experience (LAAC combined PFO/ASD closure)}}. {Expert review of medical devices}. 2019: 1-7.
OBJECTIVES: To report long-term safety and efficacy of combined percutaneous LAA and PFO/ASD closure. METHODS: A retrospective study of 370 consecutive patients undergoing LAAC procedures using the Watchman (WM) device. Data were compared between 330 cases only with LAAC procedure (Group I) and 25/5 (PFO/ASD) cases with sequential procedures of LAAC and PFO/ASD closure (Group II). RESULTS: Compared to Group I, Group II had more males (86.7% vs. 65.8%, p < 0.05) and a higher rate of stroke (33.3% vs. 10.6%, p < 0.01), but there were no statistical differences in the remaining patient characteristics. During the follow-up period, there were no significant differences between the two groups in embolism events (6.1% vs. 0%, p = 0.39), device related thrombus (5.8% vs 3.3%, p = 1.0), major bleeding (9.4% vs. 6.7%, p = 1.0) and cardiac death (3.6% vs. 0%, p = 0.61). The observed rate of all thromboembolic events by Kaplan-Meier analysis was decreased by 39.9% and 100% and the observed annual rate of bleeding was reduced by 32.9% and 57.6% in Group I and Group II, respectively. CONCLUSIONS: LAAC combined with PFO/ASD closure might be an ideal choice to prevent stroke and other thrombotic complications in patients with both NVAF and PFO/ASD. Lien vers le texte intégral (Open Access ou abonnement)
