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Mandelli V, Severino I, Eyler L, Pierce K, Courchesne E, Lombardo MV. A 3D approach to understanding heterogeneity in early developing autisms. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.05.08.24307039. [PMID: 38766085 PMCID: PMC11100949 DOI: 10.1101/2024.05.08.24307039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Phenotypic heterogeneity in early language, intellectual, motor, and adaptive functioning (LIMA) features are amongst the most striking features that distinguish different types of autistic individuals. Yet the current diagnostic criteria uses a single label of autism and implicitly emphasizes what individuals have in common as core social-communicative and restricted repetitive behavior difficulties. Subtype labels based on the non-core LIMA features may help to more meaningfully distinguish types of autisms with differing developmental paths and differential underlying biology. Using relatively large (n=615) publicly available data from early developing (24-68 months) standardized clinical tests tapping LIMA features, we show that stability-based relative cluster validation analysis can identify two robust and replicable clusters in the autism population with high levels of generalization accuracy (98%). These clusters can be described as Type I versus Type II autisms differentiated by relatively high versus low scores on LIMA features. These two types of autisms are also distinguished by different developmental trajectories over the first decade of life. Finally, these two types of autisms reveal striking differences in functional and structural neuroimaging phenotypes and their relationships with gene expression. This work emphasizes the potential importance of stratifying autism by a Type I versus Type II distinction focused on LIMA features and which may be of high prognostic and biological significance.
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Lai MC, Amestoy A, Bishop S, Brown HM, Giwa Onaiwu M, Halladay A, Harrop C, Hotez E, Huerta M, Kelly A, Miller D, Nordahl CW, Ratto AB, Saulnier C, Siper PM, Sohl K, Zwaigenbaum L, Goldman S. Improving autism identification and support for individuals assigned female at birth: clinical suggestions and research priorities. THE LANCET. CHILD & ADOLESCENT HEALTH 2023; 7:897-908. [PMID: 37973254 DOI: 10.1016/s2352-4642(23)00221-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 08/11/2023] [Accepted: 08/11/2023] [Indexed: 11/19/2023]
Abstract
Emerging evidence suggests that the higher prevalence of autism in individuals who are assigned male than assigned female at birth results from both biological factors and identification biases. Autistic individuals who are assigned female at birth (AFAB) and those who are gender diverse experience health disparities and clinical inequity, including late or missed diagnosis and inadequate support. In this Viewpoint, an international panel of clinicians, scientists, and community members with lived experiences of autism reviewed the challenges in identifying autism in individuals who are AFAB and proposed clinical and research directions to promote the health, development, and wellbeing of autistic AFAB individuals. The recognition challenges stem from the interplay between cognitive differences and nuanced or different presentations of autism in some AFAB individuals; expectancy, gender-related, and autism-related biases held by clinicians; and social determinants. We recommend that professional development for clinicians be supported by health-care systems, professional societies, and governing bodies to improve equitable access to assessment and earlier identification of autism in AFAB individuals. Autistic AFAB individuals should receive tailored support in education, identity development, health care, and social and professional sense of belonging.
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Affiliation(s)
- Meng-Chuan Lai
- Child and Youth Mental Health Collaborative at the Centre for Addiction and Mental Health and The Hospital for Sick Children, Toronto, ON, Canada; Department of Psychiatry, Temerty Faculty of Medicine, University of Toronto, ON, Canada; Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK; Department of Psychiatry, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Anouck Amestoy
- Centre for Autism Spectrum Disorders, Aquitaine Institute for Cognitive and Integrative Neurosciences, Charles Perrens Hospital, University of Bordeaux, Bordeaux, France
| | - Somer Bishop
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Heather M Brown
- Faculty of Education, University of Alberta, Edmonton, AB, Canada
| | - Morénike Giwa Onaiwu
- Autistic Women & Nonbinary Network, Lincoln, NE, USA; Rice University Center for the Study of Women, Gender, and Sexuality, School of Humanities, Houston, TX, USA
| | - Alycia Halladay
- Autism Science Foundation, Scarsdale, NY, USA; Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ, USA
| | - Clare Harrop
- Department of Health Sciences and TEACCH Autism Program, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Emily Hotez
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Marisela Huerta
- Felicity House, New York, NY, USA; Weill Cornell Medicine, New York, NY, USA
| | - Amy Kelly
- Devereux Advanced Behavioral Health, Villanova, PA, USA
| | - Dylan Miller
- Auxiliary Enterprises, University of Massachusetts, Amherst, MA, USA
| | - Christine Wu Nordahl
- Department of Psychiatry and Behavioral Sciences and MIND Institute, University of California at Davis, Davis, CA, USA
| | - Allison B Ratto
- Center for Autism Spectrum Disorders, Division of Neuropsychology, Children's National Hospital, Washington, DC, USA
| | - Celine Saulnier
- Neurodevelopmental Assessment and Consulting Services, Decatur, GA, USA
| | - Paige M Siper
- Seaver Autism Center for Research and Treatment, Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kristin Sohl
- ECHO Autism Communities, Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | | | - Sylvie Goldman
- Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA.
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Castaño PRL, Suárez DPM, González ER, Robledo-Castro C, Hederich-Martínez C, Cadena HPG, Vargas PAS, Montenegro LCG. Effects of Physical Exercise on Gross Motor Skills in Children with Autism Spectrum Disorder. J Autism Dev Disord 2023:10.1007/s10803-023-06031-5. [PMID: 37410256 DOI: 10.1007/s10803-023-06031-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Research shows many positive effects from physical exercise. The present study examined the impact of a structured physical exercise program compared to treatment as usual on the gross motor skills of children diagnosed with autism spectrum disorder (ASD). Participants included 20 children, from 4 to 7 years old, who were assigned to two groups; an experimental group (n = 10) who received a structured physical exercise program for 60-min sessions, three times a week for eight weeks, and a control group (n = 10) who received conventional physiotherapy. Gross motor skills were assessed with the Abbreviated Development Scale -3 before and after the physical exercise program. The experimental group exhibited significant improvements in gross motor skills compared to the control group. This study suggests that structured physical exercise programs can improve gross motor skills in children with ASD.
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Affiliation(s)
| | | | | | | | - Christian Hederich-Martínez
- Universidad Pedagógica Nacional, Bogotá, Cundinamarca, Colombia
- Universidad Autónona de Manizales, Manizales, Caldas, Colombia
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Singer A, Lutz A, Escher J, Halladay A. A full semantic toolbox is essential for autism research and practice to thrive. Autism Res 2023; 16:497-501. [PMID: 36508163 DOI: 10.1002/aur.2876] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022]
Abstract
Individuals diagnosed with autism spectrum disorder (ASD) present with a highly diverse set of challenges, disabilities, impairments and strengths. Recently, it has been suggested that researchers and practitioners avoid using certain words to describe the difficulties and impairments experienced by individuals with ASD to reduce stigma. The proposed limitations on terminology were developed by only a subset of the autism community, and the recommendations are already causing negative consequences that may be harmful to future scientific and clinical endeavors and, ultimately, to people with ASD. No one should have the power to censor language to exclude the observable realities of autism. Scientists and clinicians must be able to use any scientifically accurate terms necessary to describe the wide range of autistic people they study and support, without fear of censure or retribution.
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Affiliation(s)
| | - Amy Lutz
- History and Sociology of Science, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jill Escher
- National Council on Severe Autism, San Jose, California, USA
| | - Alycia Halladay
- Autism Science Foundation, New York, New York, USA
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, New Jersey, USA
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Mahony C, O'Ryan C. A molecular framework for autistic experiences: Mitochondrial allostatic load as a mediator between autism and psychopathology. Front Psychiatry 2022; 13:985713. [PMID: 36506457 PMCID: PMC9732262 DOI: 10.3389/fpsyt.2022.985713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 11/07/2022] [Indexed: 11/27/2022] Open
Abstract
Molecular autism research is evolving toward a biopsychosocial framework that is more informed by autistic experiences. In this context, research aims are moving away from correcting external autistic behaviors and toward alleviating internal distress. Autism Spectrum Conditions (ASCs) are associated with high rates of depression, suicidality and other comorbid psychopathologies, but this relationship is poorly understood. Here, we integrate emerging characterizations of internal autistic experiences within a molecular framework to yield insight into the prevalence of psychopathology in ASC. We demonstrate that descriptions of social camouflaging and autistic burnout resonate closely with the accepted definitions for early life stress (ELS) and chronic adolescent stress (CAS). We propose that social camouflaging could be considered a distinct form of CAS that contributes to allostatic overload, culminating in a pathophysiological state that is experienced as autistic burnout. Autistic burnout is thought to contribute to psychopathology via psychological and physiological mechanisms, but these remain largely unexplored by molecular researchers. Building on converging fields in molecular neuroscience, we discuss the substantial evidence implicating mitochondrial dysfunction in ASC to propose a novel role for mitochondrial allostatic load in the relationship between autism and psychopathology. An interplay between mitochondrial, neuroimmune and neuroendocrine signaling is increasingly implicated in stress-related psychopathologies, and these molecular players are also associated with neurodevelopmental, neurophysiological and neurochemical aspects of ASC. Together, this suggests an increased exposure and underlying molecular susceptibility to ELS that increases the risk of psychopathology in ASC. This article describes an integrative framework shaped by autistic experiences that highlights novel avenues for molecular research into mechanisms that directly affect the quality of life and wellbeing of autistic individuals. Moreover, this framework emphasizes the need for increased access to diagnoses, accommodations, and resources to improve mental health outcomes in autism.
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Affiliation(s)
| | - Colleen O'Ryan
- Department of Molecular and Cell Biology, University of Cape Town, Cape Town, South Africa
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