1. Gerges P, Bangarusamy DK, Bitar T, Alameddine A, Nemer G, Hleihel W. Turicibacter and Catenibacterium as potential biomarkers in autism spectrum disorders. Sci Rep;2024 (Oct 5);14(1):23184.

Autism spectrum disorders (ASD) are neurodevelopmental disorders characterized by social, behavioral, and cognitive impairments. Several comorbidities, including gastrointestinal (GI) dysregulations, are frequently reported in ASD children. Although studies in animals have shown the crucial role of the microbiota in key aspects of neurodevelopment, there is currently no consensus on how the alteration of microbial composition affects the pathogenesis of ASD. Moreover, disruption of the gut-brain axis (GBA) has been reported in ASD although with limited studies conducted on the Mediterranean population. In our study, we aimed to investigate gut microbiota composition in Lebanese ASD subjects, their unaffected siblings, and a control group from various regions in Lebanon using the 16 S-rRNA sequencing (NGS). Our study revealed a lower abundance of Turicibacter and a significant enrichment on Proteobacteria in the ASD and siblings’ groups compared to the controls, indicating that gut microbiota is probably affected by dietary habits, living conditions together with host genetic factors. The study also showed evidence of changes in the gut microbiome of ASD children compared to their siblings and the unrelated control. Bacteroidetes revealed a lower abundance in the ASD group compared to controls and siblings, conversely, Catenibacterium and Tenericutes revealed an increased abundance in the ASD group. Notably, our study identifies alterations in the abundance of Turicibacter and Catenibacterium in ASD children suggesting a possible link between these bacterial taxa and ASD and contributing to the growing body of evidence linking the microbiome to ASD.

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2. Greenfield E, Kendrick-Allwood S. Autism and cerebral palsy: evidence for converging phenotypes. Pediatr Res;2024 (Oct 5)

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3. Guzick AG, Schneider SC, Kook M, Greenberg R, Perozo-Garcia A, Lee MP, Garcia J, Onyeka OC, Riddle DB, Storch EA. Internet-based, parent-led cognitive behavioral therapy for autistic youth with anxiety-related disorders: A randomized trial comparing email vs. telehealth support. Behav Res Ther;2024 (Sep 29);183:104639.

This study tested two versions of parent-led, Internet-delivered cognitive behavioral therapy for anxiety among autistic youth; one that provided weekly email support (iCBT-Email), and one that provided alternating bi-weekly emails and video calls (iCBT-Video) across 12 weeks. It was expected that those in the iCBT-Video condition would complete more treatment content, which in turn would lead to more anxiety improvement. Fifty-seven autistic youth (7-15 years-old) with anxiety disorders were randomized to iCBT-Email or iCBT-Video. There were no significant differences in improvement in clinician-rated, child-reported, or parent-reported anxiety severity or functional impairment. Posttreatment response rates were 55% in iCBT-Email and 67% in iCBT-Video. Module completion predicted improved treatment outcome, though there was no difference in module completion across groups. Therapists spent an average of 16.29 min/family/week (SD = 7.11) in the iCBT-Email condition and 24.13 min/family/week (SD = 6.84) in the iCBT-Video condition. Email and telehealth-supported, parent-led iCBT both appear to be effective treatments for autistic youth with anxiety disorders that require reduced therapist effort. Future research should seek novel methods to enhance engagement with iCBT content. CLINICALTRIALS.GOV IDENTIFIER: NCT05284435.

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4. Leachman C, Nichols ES, Al-Saoud S, Duerden EG. Anxiety in children and adolescents with autism spectrum disorder: behavioural phenotypes and environmental factors. BMC Psychol;2024 (Oct 5);12(1):534.

BACKGROUND: Anxiety is the most prevalent comorbidity among children and adolescents with autism spectrum disorder (ASD), yet little is known about the associated risk factors. METHODS: In a heterogenous cohort of children aged 5-18 years old (n = 262, 42% ASD), participants and their parents completed standardized questionnaires to assess anxiety, ASD symptom severity, inattention/hyperactivity, emotional problems, depressive symptoms, parental styles and stress, and demographic factors. RESULTS: An artificial neural network analysis using a self-organizing map, a statistical technique used to cluster large datasets, revealed 3 distinct anxiety profiles: low (n = 114, 5% ASD), moderate (n = 70, 64% ASD) and high (n = 78, 96% ASD) anxiety. A recursive feature elimination analysis revealed that depression and peer problems contributed the most to differences between the anxiety profiles. Difficulties with peers in individuals with ASD who experience anxiety may be related to challenges with social competence and this may heighten depressive symptoms. CONCLUSION: Findings highlight the importance of assessing depressive symptoms in children and adolescents with ASD who experience anxiety. Identifying anxiety profiles among children and adolescents with ASD may prove beneficial in clinical practice by facilitating the development of tailored interventions that aid in managing anxiety and depressive symptoms. Furthermore, strengthening social communication skills may improve peer relationships and could aid in managing depressive symptoms among children and adolescents with ASD who experience anxiety.

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5. Moreno RJ, Amara R, Ashwood P. Toward a better understanding of T cell dysregulation in autism: An integrative review. Brain Behav Immun;2024 (Oct 6)

Autism spectrum disorder (ASD) is a highly heterogeneous disorder characterized by impairments in social, communicative, and restrictive behaviors. Over the past 20 years, research has highlighted the role of the immune system in regulating neurodevelopment and behavior. In ASD, immune abnormalities are frequently observed, such as elevations in pro-inflammatory cytokines, alterations in immune cell frequencies, and dysregulated mechanisms of immune suppression. The adaptive immune system – the branch of the immune system conferring cellular immunity – may be involved in the etiology of ASD. Specifically, dysregulated T cell activity, characterized by altered cellular function and increased cytokine release, presence of inflammatory phenotypes and altered cellular signaling, has been consistently observed in several studies across multiple laboratories and geographic regions. Similarly, mechanisms regulating their activation are also disrupted. T cells at homeostasis coordinate the healthy development of the central nervous system (CNS) during early prenatal and postnatal development, and aid in CNS maintenance into adulthood. Thus, T cell dysregulation may play a role in neurodevelopment and the behavioral and cognitive manifestations observed in ASD. Outside of the CNS, aberrant T cell activity may also be responsible for the increased frequency of immune based conditions in the ASD population, such as allergies, gut inflammation and autoimmunity. In this review, we will discuss the current understanding of T cell biology in ASD and speculate on mechanisms behind their dysregulation. This review also evaluates how aberrant T cell biology affects gastrointestinal issues and behavior in the context of ASD.

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6. Potts B, White HP. Student radiographers’ confidence of adapting practice for autistic patients: A qualitative survey on the role of placement experiences. Radiography (Lond);2024 (Oct 3);30 Suppl 2:34-41.

INTRODUCTION: Healthcare services can be inaccessible to autistic people without adaptions to clinical practice and the care provided. Therefore, understanding how radiographer education develops students’ confidence in adapting care for autistic patients is crucial. This study aimed to explore how placement experience impacts student radiographer confidence in adapting care for autistic patients. METHODS: UK final-year student diagnostic and therapeutic radiographers were invited to complete a qualitative online survey. The survey asked for a description of placement experiences; of observing and/or performing the care of autistic patients and how this impacted confidence in caring for autistic patients. The data was thematically analysed. RESULTS: 43 responses (of 44 received) were included, from which 5 themes emerged. Those who felt placement experiences developed confidence described opportunities to apply theory learnt at university (theme 1) or drew attention to the benefit of prior (external) experience with autistic people (theme 3). However, the balance of power with the supervising radiographer (theme 2), witnessing autistic patients in distress (theme 4), and the heterogeneous nature of autism (theme 5) disrupted students’ development of confidence. CONCLUSION: Several participants in this study found clinical placement developed confidence with autistic patients through applying knowledge and providing an opportunity for reflexive learning. However, various obstacles hindered this development, such as witnessing distressed patients, limited experiences with autistic patients and difficulty navigating relationships with radiographers. IMPLICATIONS FOR PRACTICE: To improve student radiographers’ confidence of providing care for autistic patients, educators should consider methods, e.g., co-produced simulation, to fill potential gaps in their experience. There is also a pressing need for all radiographers to understand their responsibility in educating students and their impact on student wellbeing.

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7. Rajabi P, Noori AS, Sargolzaei J. Autism spectrum disorder and various mechanisms behind it. Pharmacol Biochem Behav;2024 (Oct 6):173887.

Autism Spectrum Disorder (ASD) is a complex and heterogeneous neurodevelopmental condition characterized by a range of social, communicative, and behavioral challenges. This comprehensive review delves into key aspects of ASD. Clinical Overview and genetic features provide a foundational understanding of ASD, highlighting the clinical presentation and genetic underpinnings that contribute to its complexity. We explore the intricate neurobiological mechanisms at play in ASD, including structural and functional differences that may underlie the condition’s hallmark traits. Emerging research has shed light on the role of the immune system and neuroinflammation in ASD. This section investigates the potential links between immunological factors and ASD, offering insights into the condition’s pathophysiology. We examine how atypical functional connectivity and alterations in neurotransmitter systems may contribute to the unique cognitive and behavioral features of ASD. In the pursuit of effective interventions, this section reviews current therapeutic strategies, ranging from behavioral and educational interventions to pharmacological approaches, providing a glimpse into the diverse and evolving landscape of ASD treatment. This holistic exploration of mechanisms in ASD aims to contribute to our evolving understanding of the condition and to guide the development of more targeted and personalized interventions for individuals living with ASD.

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8. Tsurutani M, Goto T, Hagihara M, Irie S, Miyamichi K. Selective vulnerability of parvocellular oxytocin neurons in social dysfunction. Nat Commun;2024 (Oct 6);15(1):8661.

Selective vulnerability offers a conceptual framework for understanding neurodegenerative disorders such as Parkinson’s disease, where specific neuronal types are selectively affected and adjacent ones are spared. However, the applicability of this framework to neurodevelopmental disorders, particularly those characterized by atypical social behaviors, such as autism spectrum disorder, remains uncertain. Here we show that an embryonic disturbance, known to induce social dysfunction in male mice, preferentially impaired the gene expression crucial for neural functions in parvocellular oxytocin (OT) neurons-a subtype linked to social rewards-while neighboring cell types experienced a lesser impact. Chemogenetic stimulation of OT neurons at the neonatal stage ameliorated social deficits in early adulthood, concurrent with cell-type-specific sustained recovery of pivotal gene expression within parvocellular OT neurons. Collectively, our data shed light on the transcriptomic selective vulnerability within the hypothalamic social behavioral center and provide a potential therapeutic target through specific neonatal neurostimulation.

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9. Yamada R, Fuchigami T, Kimura K, Ishii W, Morioka I. Autism spectrum disorder with iodine deficiency hypothyroidism in a 6-year-old boy. Pediatr Int;2024 (Jan-Dec);66(1):e15795.

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10. Zhang B, Wu H, Zhang C, Wan L, Yang G. Prevalence Trends and Treatment Patterns of Autism Spectrum Disorder Among Children and Adolescents in the United States from 2017 to 2020. Neurol Ther;2024 (Oct 5)

BACKGROUND: Autism spectrum disorder (ASD) poses a significant challenge due to its diverse impact on individuals, emphasizing the need for personalized treatment plans. The financial burden of ASD-related healthcare is substantial, necessitating a comprehensive understanding of its prevalence and evolving trends. METHODS: This study aims to analyze the prevalence and trends of ASD, treatment patterns, gender differences, and racial-ethnic disparities in the United States from 2017 to 2020, utilizing nationally representative data from the National Survey of Children’s Health (NSCH). The NSCH, a leading annual national survey, provided rich data on child health. A total of 108,142 participants aged 3-17 years were included, with ASD prevalence assessed based on self-reported diagnoses. RESULTS: Between 2017 and 2020, ASD prevalence in children aged 3-17 was 2.94% (95% confidence interval: 2.68-3.18). Significant disparities were observed: older age and male gender correlated with higher prevalence, while family income-to-poverty ratio and insurance coverage influenced prevalence. Racial/ethnic disparities existed, with Hispanics showing the highest prevalence. Treatment trends showed stability overall, but age influenced behavioral and medication interventions. The prevalence remained stable from 2017 to 2020, with variations in age groups and a significant increase among non-Hispanic Whites. CONCLUSIONS: This study highlights a higher but stable overall ASD prevalence, with nuanced disparities among different demographic groups. Gender differences persist, emphasizing the need for tailored interventions. Racial-ethnic disparities call for targeted healthcare strategies. The stability in treatment trends underscores the persistent challenge of addressing core ASD symptoms.

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