1. Arakawa H. {{From Multisensory Assessment to Functional Interpretation of Social Behavioral Phenotype in Transgenic Mouse Models for Autism Spectrum Disorders}}. {Frontiers in psychiatry}. 2020; 11: 592408.
Autism spectrum disorder (ASD) is a common heterogeneous disorder, defined solely by the core behavioral characteristics, including impaired social interaction and restricted and repeated behavior. Although an increasing number of studies have been performed extensively, the neurobiological mechanisms underlying the core symptoms of ASD remain largely unknown. Transgenic mouse models provide a useful tool for evaluating genetic and neuronal mechanisms underlying ASD pathology, which are prerequisites for validating behavioral phenotypes that mimic the core symptoms of human ASD. The purpose of this review is to propose a better strategy for analyzing and interpreting social investigatory behaviors in transgenic mouse models of ASD. Mice are nocturnal, and employ multimodal processing mechanisms for social communicative behaviors, including those that involve olfactory and tactile senses. Most behavioral paradigms that have been developed for measuring a particular ASD-like behavior in mouse models, such as social recognition, preference, and discrimination tests, are based on the evaluation of distance-based investigatory behavior in response to social stimuli. This investigatory behavior in mice is regulated by multimodal processing involving with two different motives: first, an olfactory-based novelty assessment, and second, tactile-based social contact, in a temporally sequential manner. Accurate interpretation of investigatory behavior exhibited by test mice can be achieved by functional analysis of these multimodal, sequential behaviors, which will lead to a better understanding of the specific features of social deficits associated with ASD in transgenic mouse models, at high temporal and spatial resolutions.
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2. Baillin F, Lefebvre A, Pedoux A, Beauxis Y, Engemann DA, Maruani A, Amsellem F, Kelso JAS, Bourgeron T, Delorme R, Dumas G. {{Interactive Psychometrics for Autism With the Human Dynamic Clamp: Interpersonal Synchrony From Sensorimotor to Sociocognitive Domains}}. {Frontiers in psychiatry}. 2020; 11: 510366.
The human dynamic clamp (HDC) is a human-machine interface designed on the basis of coordination dynamics for studying realistic social interaction under controlled and reproducible conditions. Here, we propose to probe the validity of the HDC as a psychometric instrument for quantifying social abilities in children with autism spectrum disorder (ASD) and neurotypical development. To study interpersonal synchrony with the HDC, we derived five standardized scores following a gradient from sensorimotor and motor to higher sociocognitive skills in a sample of 155 individuals (113 participants with ASD, 42 typically developing participants; aged 5 to 25 years; IQ > 70). Regression analyses were performed using normative modeling on global scores according to four subconditions (HDC behavior « cooperative/competitive, » human task « in-phase/anti-phase, » diagnosis, and age at inclusion). Children with ASD had lower scores than controls for motor skills. HDC motor coordination scores were the best candidates for stratification and diagnostic biomarkers according to exploratory analyses of hierarchical clustering and multivariate classification. Independently of phenotype, sociocognitive skills increased with developmental age while being affected by the ongoing task and HDC behavior. Weaker performance in ASD for motor skills suggests the convergent validity of the HDC for evaluating social interaction. Results provided additional evidence of a relationship between sensorimotor and sociocognitive skills. HDC may also be used as a marker of maturation of sociocognitive skills during real-time social interaction. Through its standardized and objective evaluation, the HDC not only represents a valid paradigm for the study of interpersonal synchrony but also offers a promising, clinically relevant psychometric instrument for the evaluation and stratification of sociomotor dysfunctions.
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3. Bishop DVM, Swendsen J. {{Psychoanalysis in the treatment of autism: why is France a cultural outlier?}}. {BJPsych bulletin}. 2020: 1-5.
In most countries, social or behavioural interventions are recommended for autism. However, in France, psychoanalysis is still used, despite objections by patients, families and mental health experts. Supporters of psychoanalysis maintain that the choice of therapeutic approach is a matter of cultural preference, and that objections to psychoanalysis arise from misunderstandings. We argue that more deep-rooted problems are the lack of an evidence base for psychoanalysis and its focus on sexual relationships between children and adults, which demonises mothers and can put children at risk of abuse. Furthermore, psychoanalysis in France is protected from criticism by powerful educational and political networks.
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4. Carmona-Serrano N, López-Belmonte J, Cuesta-Gómez JL, Moreno-Guerrero AJ. {{Documentary Analysis of the Scientific Literature on Autism and Technology in Web of Science}}. {Brain Sci}. 2020; 10(12).
The objective of the study is to track the progression of the scientific literature on autism and the technology applied to this disorder. A bibliometric methodology has been used, based on a co-word analysis. The Web of Science database was chosen to perform the analysis of the literature. A unit of analysis of 1048 publications was configured. SciMAT software was used mainly for document analysis. The results indicate that the first studies appeared in 1992, but it was not until 2009 that the research volume increased considerably. The area of knowledge where these studies were compiled was rehabilitation, which marks the truly therapeutic nature of this type of study. One of the authors with the most studies, as well as the most relevant research, was Sarkar, N. Manuscripts were usually research articles written in English. It could be concluded that research in this field of study focused mainly on interventions carried out through the use of technological resources, with students or young people who present with ASD. This line of research, although not the only one, was the most relevant and the one that had aroused the most interest among the scientific community.
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5. Casanova MF, Frye RE, Gillberg C, Casanova EL. {{Editorial: Comorbidity and Autism Spectrum Disorder}}. {Frontiers in psychiatry}. 2020; 11: 617395.
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6. Culnane E, Loftus H, Efron D, Williams K, Di Iorio N, Shepherd R, Marraffa C, Lubitz L, Antolovich G, Prakash C. {{Development of the Fearless, Tearless Transition model of care for adolescents with an intellectual disability and/or autism spectrum disorder with mental health comorbidities}}. {Dev Med Child Neurol}. 2020.
AIM: First, to understand the barriers to achieving effective transition and the supports required from the perspective of parents and carers, adolescents with intellectual disability and/or autism spectrum disorder and co-existing mental health disorders (often termed ‘dual disability’), and those who provide services to this group. Second, to develop an informed model of shared care to improve the transition of adolescents with dual disabilities. METHOD: Carers and a young adult with a dual disability were surveyed about their experience of transition care. Other key stakeholders including paediatricians, general practitioners, and policy makers were also interviewed. These data informed the model of care. RESULTS: Paediatricians and general practitioners reported difficulties establishing working relationships to foster smooth transitions, and carers reported lacking a regular general practitioner with adequate expertise to care for people with dual disabilities. A process of shared care between paediatricians and general practitioners was developed and initiated by a dedicated transition manager, who assisted with care coordination and service linkages. Standardized clinical assessment tools were also introduced to determine patient and carer support needs. INTERPRETATION: This study highlights the potential to improve transition outcomes for adolescents with dual disabilities and their carers through early transition planning, consistent methods of assessing patient and carer needs, and shared care.
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7. Di Lorenzo G, Riccioni A, Ribolsi M, Siracusano M, Curatolo P, Mazzone L. {{Auditory Mismatch Negativity in Youth Affected by Autism Spectrum Disorder With and Without Attenuated Psychosis Syndrome}}. {Frontiers in psychiatry}. 2020; 11: 555340.
The present study investigates the differences in auditory mismatch negativity (MMN) parameters given in a sample of young subjects with autism spectrum disorder (ASD, n = 37) with or without co-occurrent attenuated psychosis syndrome (APS). Our results show that ASD individuals present an MMN decreased amplitude and prolonged latency, without being influenced by concurrent APS. Additionally, when correlating the MMN indexes to clinical features, in the ASD + APS group, we found a negative correlation between the severity of autistic symptoms and the MMN latency in both frequency (f-MMN r = -0.810; p < 0.0001) and duration (d-MMN r = -0.650; p = 0.006) deviants. Thus, our results may provide a more informative characterization of the ASD sub-phenotype when associated with APS, highlighting the need for further longitudinal investigations. Lien vers le texte intégral (Open Access ou abonnement)
8. Erden YJ, Hummerstone H, Rainey S. {{Automating autism assessment: What AI can bring to the diagnostic process}}. {Journal of evaluation in clinical practice}. 2020.
This paper examines the use of artificial intelligence (AI) for the diagnosis of autism spectrum disorder (ASD, hereafter autism). In so doing we examine some problems in existing diagnostic processes and criteria, including issues of bias and interpretation, and on concepts like the ‘double empathy problem’. We then consider how novel applications of AI might contribute to these contexts. We’re focussed specifically on adult diagnostic procedures as childhood diagnosis is already well covered in the literature.
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9. Fernell E, Gustafsson P, Gillberg C. {{Bumetanide for autism: open-label trial in six children}}. {Acta paediatrica (Oslo, Norway : 1992)}. 2020.
AIM: Bumetanide, a diuretic agent, that reduces intracellular chloride – thereby reinforcing GABAergic inhibition – has been reported to improve core symptoms of autism in children. Given the positive results reported from French trials of bumetanide in children with autism, we decided to evaluate its effects in a small-scale pilot study, in advance of a larger randomised controlled study (RCT). METHODS: This was an open-label, three-month trial of bumetanide on six children (five boys), aged 3-14 years with autism. Ratings according to the PArental Satisfaction Survey (PASS) were used after four and twelve weeks to assess symptom change. Blood electrolyte status was monitored. RESULTS: Improvement in the PASS domain « Communicative and cognitive abilities » was marked or very marked in four children and two had some improvements. Few negative side effects were reported. CONCLUSION: Our small cohort responded well to bumetanide, particularly with regard to « Communicative and cognitive abilities ». Taken with the evidence from larger-scale RCTs, we suggest that bumetanide should be considered for inclusion in ethically approved treatment/management trials for children with autism, subject to rigorous follow-up in large scale RCTs.
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10. Horiai M, Otsuka A, Hidema S, Hiraoka Y, Hayashi R, Miyazaki S, Furuse T, Mizukami H, Teruyama R, Tamura M, Bito H, Maejima Y, Shimomura K, Nishimori K. {{Targeting oxytocin receptor (Oxtr)-expressing neurons in the lateral septum to restore social novelty in autism spectrum disorder mouse models}}. {Sci Rep}. 2020; 10(1): 22173.
Autism spectrum disorder (ASD) is a continuum of neurodevelopmental disorders and needs new therapeutic approaches. Recently, oxytocin (OXT) showed potential as the first anti-ASD drug. Many reports have described the efficacy of intranasal OXT therapy to improve the core symptoms of patients with ASD; however, the underlying neurobiological mechanism remains unknown. The OXT/oxytocin receptor (OXTR) system, through the lateral septum (LS), contributes to social behavior, which is disrupted in ASD. Therefore, we selectively express hM3Dq in OXTR-expressing (OXTR+) neurons in the LS to investigate this effect in ASD mouse models developed by environmental and genetic cues. In mice that received valproic acid (environmental cue), we demonstrated successful recovery of impaired social memory with three-chamber test after OXTR+ neuron activation in the LS. Application of a similar strategy to Nl3(R451C) knock-in mice (genetic cue) also caused successful recovery of impaired social memory in single field test. OXTR+ neurons in the LS, which are activated by social stimuli, are projected to the CA1 region of the hippocampus. This study identified a candidate mechanism for improving core symptoms of ASD by artificial activation of DREADDs, as a simulation of OXT administration to activate OXTR+ neurons in the LS.
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11. Kapra O, Rotem R, Gross R. {{The Association Between Prenatal Exposure to Antidepressants and Autism: Some Research and Public Health Aspects}}. {Frontiers in psychiatry}. 2020; 11: 555740.
Use of antidepressants (ADs) in general, and in pregnant notwithstanding, has been increasing globally in recent decades. Associations with a wide range of adverse perinatal and childhood outcomes following prenatal ADs exposure have been observed in registry-based studies, with Autism Spectrum Disorders (ASD) frequently reported. Studies using animal models, sibling analyses, and negative control approaches, have linked dysfunctional serotonin metabolism with ASD, but did not convincingly tease apart the role of maternal mental health from that of ADs. As work to decipher the nature of the AD-ASD association continues, this review raises some public health concerns pertinent to a hypothetical conclusion that this association is causal, including the need to identify specific gestation periods with higher risk, the importance of precise assessment of the ASD potential prevention that might be attributed to AD discontinuation, and the estimation of risks associated with prenatal exposure to untreated depression.
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12. Kong X, Zhu J, Tian R, Liu S, Sherman HT, Zhang X, Lin X, Han Y, Xiang Z, Koh M, Hobbie C, Wang B, Liu K, Liu J, Yin Y, Wan G. {{Early Screening and Risk Factors of Autism Spectrum Disorder in a Large Cohort of Chinese Patients With Prader-Willi Syndrome}}. {Frontiers in psychiatry}. 2020; 11: 594934.
Previous studies regarding the prevalence of Autism Spectrum Disorder (ASD) in patients with Prader-Willi Syndrome (PWS) have implicated heterogenous findings. Additionally, the early screening of ASD high-risk population for ASD and identifying ASD risk factors in PWS patients have not been explored. This study included 218 Chinese PWS patients aged 3 months to 18 years old. 78% of subjects were identified as high risk for ASD by ASQ-3 Communication domain score for those younger than 3 years of age and 84% of subjects were classified as high risk for ASD by the GARS-3 for those aged 3 years and older. Among PWS clinical measurements, under-height (P = 0.0186), overweight (P = 0.0248), and obstructive sleep apnea (P = 0.0259) were each significantly correlated with ASD risk. These risk factors and their internal relationship with ASD or ASD traits warrant further studies.
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13. Lai X, Zhang Q, Zhu J, Yang T, Guo M, Li Q, Liu H, Wu QH, Chen J, Li TY. {{A weekly vitamin A supplementary program alleviates social impairment in Chinese children with autism spectrum disorders and vitamin A deficiency}}. {European journal of clinical nutrition}. 2020.
BACKGROUND: Children in China with Autism Spectrum Disorders (ASD) are prone to vitamin A deficiency (VAD). The present study compared two vitamin A supplements (VAS) in two groups of children with ASD and VAD to explore a better VAS program for children with ASD. METHOD: A total of 138 3-8-year-old children with ASD (118 males and 20 females) were enrolled in this 6-month study. Of these 138 children, 82 who had VAD (ASD-VAD) were divided into two VAS groups that received the recommended VAS program (RNI-VAS) or a weekly dose of VAS (WD-VAS). The 56 children who had normal vitamin A levels (ASD-VAN) served as a control group. The Social Responsiveness Scale (SRS) was used to assess the severity of social impairment before and after the interventions. Their serum retinol (VA) and oxytocin (OXT) concentrations, the mRNA expression of retinoic acid receptors (RARs), and CD38 gene in peripheral blood was measured before and after the 6-month intervention. RESULTS: The WD-VAS program increased VA levels better than the RNI-VAS program did (P < 0.01), and it significantly decreased SRS scores (P < 0.05). In addition, the change in VA was positively correlated with the change in mRNA levels in RARβ (r = 0.2441, P = 0.0092), the CD38 in PBMC (r = 0.2729, P = 0.0033), and the change in OXT concentration in serum (r = 0.3735, P < 0.0001). VA was also negatively correlated with changes in SRS scores across the three groups (r = -0.2615, P = 0.0026). CONCLUSION: The WD-VAS might be more suitable for children with ASD and VAD than other interventions to improve both VA and social functioning, which may be mediated through the RARβ-CD38-OXT axis. Lien vers le texte intégral (Open Access ou abonnement)
14. McGrath K, Bonuck K, Mann M. {{Exploratory spatial analysis of autism rates in New York school districts: role of sociodemographic and language differences}}. {J Neurodev Disord}. 2020; 12(1): 35.
BACKGROUND: Literature on autism spectrum disorder (ASD) suggests lower ASD prevalence and higher age of diagnosis among children of color, from lower socioeconomic backgrounds, and from families with lower educational levels. These disparities have been attributed to factors such as limited access to diagnostic and treatment services, less opportunity for upward mobility to locales with ample resources, and linguistic barriers. However, few studies describe prevalence and geographic differences of ASD diagnoses by English Language Learner (ELL) status. OBJECTIVES: The primary objectives of this study are to (1) spatially explore the prevalence of ASD among New York State school districts and (2) examine differences of ASD prevalence rates between ELLs and native English-speaking peers. METHODS: Using the 2016-2017 district-level data on public and non-public school age students (3-21 years old) receiving special education services in New York, we analyzed sociodemographic trends among school districts with varying percentages (low, medium, and high ranges) of students with ASD and ELLs. To do this, we conducted exploratory spatial analyses using GIS software, analysis of school district level demographic data, and multivariate linear regression. RESULTS: In contrast to prior research on ASD prevalence among minority groups, we found disproportionately higher rates of ASD among school districts with higher proportions of Black and Hispanic students. Geographic analysis revealed statistically significant clustering of school districts with high ASD rates in New York City and Albany. Higher proportions of ELLs tended to be concentrated in densely populated, urban, and geographically smaller school districts and had higher proportions of Black, Hispanic, and Asian students. CONCLUSIONS: Schools with higher rates of ASD and ELL students tend to be concentrated in urban regions throughout New York and have higher representation of Black and Hispanic/Latino students, as well as higher rates of learning disabilities in general. Further research is warranted to explore possible reasons for this phenomenon.
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15. Moretto G, Ishihara M, Ribeiro M, Caetano SC, Perissinoto J, Tamanaha AC. {{Interference of the communicative profile of children with autism spectrum disorders upon their mother’s quality of life}}. {CoDAS}. 2020; 32(6): e20190170.
PURPOSE: According to the World Health Organization, quality of life is defined as the perception an individual has on his/her position within the cultural context and the system of values in which he/she is contained. This perception is intrinsically related to the objectives, expectations, patterns, and concerns of such an individual. We know that when a member of a family is assailed by an ailment, the quality of life of all of those who surround him/her suffer a strong impact. One of the great concerns of the families regarding the development of a child with Autism Spectrum Disorder (ASD) is the lack or impairment of the child’s speech. Thus, the objective of this study was to analyze the interference of the communicative means of children with ASD upon the quality of life of their mothers. METHODS: This was a transversal study. The sample was obtained from 41 mothers of children diagnosed with ASD by a multi-disciplinary team: the mothers were divided into two groups: 20 mothers of non-verbal children-GASD-NV; and 21 mothers of verbal children-GASD. We applied the WHOQOL-Bref questionnaire to score and analyze the quality of life of these mothers. RESULTS: There was no significant difference in the maternal perception related to the domains that reflected the quality of life which we compared between these two groups of mothers. In both groups, we observed high indexes of dissatisfaction. CONCLUSION: We verified that the quality of life of the mothers of children with ASD was affected regardless of the communicative means used by the child.
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16. Mormando C, Mikoluk C, Garman JC, Rapp M, Murray M, Francis A. {{Electroconvulsive Therapy for Autism-related Stereotyped Emesis After Chiari Malformation Type 1 Craniectomy}}. {The journal of ECT}. 2020; Publish Ahead of Print.
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17. Morrison KE, DeBrabander KM, Jones DR, Ackerman RA, Sasson NJ. {{Social Cognition, Social Skill, and Social Motivation Minimally Predict Social Interaction Outcomes for Autistic and Non-Autistic Adults}}. {Front Psychol}. 2020; 11: 591100.
Social cognition, social skill, and social motivation have been extensively researched and characterized as atypical in autistic people, with the assumption that each mechanistically contributes to the broader social interaction difficulties that diagnostically define the condition. Despite this assumption, research has not directly assessed whether or how these three social domains contribute to actual real-world social interaction outcomes for autistic people. The current study administered standardized measures of social cognition, social skill, and social motivation to 67 autistic and 58 non-autistic (NA) adults and assessed whether performance on these measures, both individually and relationally between dyadic partners, predicted outcomes for autistic and NA adults interacting with unfamiliar autistic and NA partners in a 5 minute unstructured « get to know you » conversation. Consistent with previous research, autistic adults scored lower than NA adults on the three social domains and were evaluated less favorably by their conversation partners. However, links between autistic adults’ performance on the three social domains and their social interaction outcomes were minimal and, contrary to prediction, only the social abilities of NA adults predicted some interaction outcomes within mixed diagnostic dyads. Collectively, results suggest that reduced performance by autistic adults on standardized measures of social cognition, social skill, and social motivation do not correspond in clear and predictable ways with their real-world social interaction outcomes. They also highlight the need for the development and validation of more ecological assessments of autistic social abilities and the consideration of relational dynamics, not just individual characteristics, when assessing social disability in autism.
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18. Pillay S, Duncan M, de Vries PJ. {{Autism in the Western Cape province of South Africa: Rates, socio-demographics, disability and educational characteristics in one million school children}}. {Autism}. 2020: 1362361320978042.
There is very little information about autism spectrum disorder in South Africa and not much is known about children with autism spectrum disorder and their educational needs. In this study, we searched for all children with autism spectrum disorder attending schools in the Western Cape province of South Africa and compared our findings with the profile of people living in the province. We found fewer children with autism spectrum disorder in schools than expected (0.08%) and co-occurring conditions (intellectual disability = 22.2%, attention-deficit/hyperactivity disorder = 2.6% and epilepsy = 0.7%) were reported at lower rates. More children were from White racial groups and from English-speaking homes compared with the Western Cape population demographics. Most of the children (89%) attended schools for children with Special Educational Needs and only 10% were in Ordinary/Mainstream schools. Eighty-three percent attended schools in urban areas and 17% in rural areas. There was a 76.03% increase in children with autism spectrum disorder in schools between 2012 and 2016. Our findings support the need for better identification and reporting of children with autism spectrum disorder in the education system. We propose urgent review and strengthening of education systems for children with autism spectrum disorder in the Western Cape province and in other parts of South Africa.
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19. Roman-Urrestarazu A, Yáñez C, López-Garí C, Elgueta C, Allison C, Brayne C, Troncoso M, Baron-Cohen S. {{Autism screening and conditional cash transfers in Chile: Using the Quantitative Checklist (Q-CHAT) for early autism detection in a low resource setting}}. {Autism}. 2020: 1362361320972277.
Getting a diagnosis of autism can take long, because autism is different across people, but also because it depends on the way it gets diagnosed. This is especially important in poorer countries or in the case of poor people living in wealthier countries that have significant groups of disadvantaged communities. We adapted a 10-item version of the Q-CHAT-25 questionnaire for use in routine health check-ups programme in Chile and recruited 287 participants under the age of three divided into three groups: Controls (125), Developmental Delay (149) and Autism Spectrum Condition (13). Our results show that a short questionnaire for autism screening can be successfully applied in a health-check programme in poor resource settings. Our results show that our questionnaire had good overall performance, not different to its longer version, the Q-CHAT-25. Our questionnaire was autism specific, with good sensitivity and reliability, and is suitable to be used in a screening setting. This study provides evidence that the implementation of Autism Spectrum Condition screening programmes using the Q-CHAT-10 provides value for money and improves diagnosis of Autism Spectrum Condition in those participating in routine health check-up programmes in developing countries or poor areas of wealthy countries.
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20. Schneider JN, Brick TR, Dziobek I. {{Distance to the Neutral Face Predicts Arousal Ratings of Dynamic Facial Expressions in Individuals With and Without Autism Spectrum Disorder}}. {Front Psychol}. 2020; 11: 577494.
Arousal is one of the dimensions of core affect and frequently used to describe experienced or observed emotional states. While arousal ratings of facial expressions are collected in many studies it is not well understood how arousal is displayed in or interpreted from facial expressions. In the context of socioemotional disorders such as Autism Spectrum Disorder, this poses the question of a differential use of facial information for arousal perception. In this study, we demonstrate how automated face-tracking tools can be used to extract predictors of arousal judgments. We find moderate to strong correlations among all measures of static information on one hand and all measures of dynamic information on the other. Based on these results, we tested two measures, average distance to the neutral face and average facial movement speed, within and between neurotypical individuals (N = 401) and individuals with autism (N = 19). Distance to the neutral face was predictive of arousal in both groups. Lower mean arousal ratings were found for the autistic group, but no difference in correlation of the measures and arousal ratings could be found between groups. Results were replicated in an high autistic traits group. The findings suggest a qualitatively similar perception of arousal for individuals with and without autism. No correlations between valence ratings and any of the measures could be found, emphasizing the specificity of our tested measures. Distance and speed predictors share variability and thus speed should not be discarded as a predictor of arousal ratings.
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21. Volk HE, Park B, Hollingue C, Jones KL, Ashwood P, Windham GC, Lurman F, Alexeeff SE, Kharrazi M, Pearl M, Van de Water J, Croen LA. {{Maternal immune response and air pollution exposure during pregnancy: insights from the Early Markers for Autism (EMA) study}}. {J Neurodev Disord}. 2020; 12(1): 42.
BACKGROUND: Perinatal exposure to air pollution and immune system dysregulation are two factors consistently associated with autism spectrum disorders (ASD) and other neurodevelopmental outcomes. However, little is known about how air pollution may influence maternal immune function during pregnancy. OBJECTIVES: To assess the relationship between mid-gestational circulating levels of maternal cytokines/chemokines and previous month air pollution exposure across neurodevelopmental groups, and to assess whether cytokines/chemokines mediate the relationship between air pollution exposures and risk of ASD and/or intellectual disability (ID) in the Early Markers for Autism (EMA) study. METHODS: EMA is a population-based, nested case-control study which linked archived maternal serum samples collected during weeks 15-19 of gestation for routine prenatal screening, birth records, and Department of Developmental Services (DDS) records. Children receiving DDS services for ASD without intellectual disability (ASD without ID; n = 199), ASD with ID (ASD with ID; n = 180), ID without ASD (ID; n = 164), and children from the general population (GP; n = 414) with no DDS services were included in this analysis. Serum samples were quantified for 22 cytokines/chemokines using Luminex multiplex analysis technology. Air pollution exposure for the month prior to maternal serum collection was assigned based on the Environmental Protection Agency’s Air Quality System data using the maternal residential address reported during the prenatal screening visit. RESULTS: Previous month air pollution exposure and mid-gestational maternal cytokine and chemokine levels were significantly correlated, though weak in magnitude (ranging from - 0.16 to 0.13). Ten pairs of mid-pregnancy immune markers and previous month air pollutants were significantly associated within one of the child neurodevelopmental groups, adjusted for covariates (p < 0.001). Mid-pregnancy air pollution was not associated with any neurodevelopmental outcome. IL-6 remained associated with ASD with ID even after adjusting for air pollution exposure. CONCLUSION: This study suggests that maternal immune activation is associated with risk for neurodevelopmental disorders. Furthermore, that prenatal air pollution exposure is associated with small, but perhaps biologically relevant, effects on maternal immune system function during pregnancy. Additional studies are needed to better evaluate how prenatal exposure to air pollution affects the trajectory of maternal immune activation during pregnancy, if windows of heightened susceptibility can be identified, and how these factors influence neurodevelopment of the offspring. Lien vers le texte intégral (Open Access ou abonnement)
22. Yang J, Fu X, Liao X, Li Y. {{Nrf2 Activators as Dietary Phytochemicals Against Oxidative Stress, Inflammation, and Mitochondrial Dysfunction in Autism Spectrum Disorders: A Systematic Review}}. {Frontiers in psychiatry}. 2020; 11: 561998.
Autism spectrum disorder (ASD) is a pervasive neurodevelopmental disorder with limited available treatments and diverse causes. In ASD patients, numerous researches demonstrated various alterations in inflammation/immune, oxidative stress, and mitochondrial dysfunction, and these alterations could be regulated by Nrf2. Hence, we aimed to systematically review the current evidence about the effects of Nrf2 activator supplementation on ASD objects from in vitro studies, animal studies, and clinical studies. Relevant articles were retrieved through searching for the Cochrane Library, PubMed, Web of Science, Scope, Embase, and CNKI databases (through September 23, 2020). Ultimately, we identified 22 preclinical studies, one cell culture study, and seven clinical studies, covering a total of five Nrf2 activators. For each Nrf2 activator, we focused on its definition, potential therapeutic mechanisms, latest research progress, research limitations, and future development directions. Our systematic review provided suggestive evidence that Nrf2 activators have a potentially beneficial role in improving autism-like behaviors and abnormal molecular alterations through oxidant stress, inflammation, and mitochondrial dysfunction. These dietary phytochemicals are considered to be relatively safer and effective for ASD treatment. However, there are few clinical studies to support the Nrf2 activators as dietary phytochemicals in ASD, even though several preclinical studies. Therefore, caution should be warranted in attempting to extrapolate their effects in human studies, and better design and more rigorous research are required before they can be determined as a therapeutic option.
