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Autism Spectrum Disorder01:19

Autism Spectrum Disorder

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Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
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Cortical interneurons in autism.

Anis Contractor1,2, Iryna M Ethell3, Carlos Portera-Cailliau4,5

  • 1Department of Neuroscience Feinberg School of Medicine, Weinberg College of Arts and Sciences, Northwestern University, Chicago, IL, USA.

Nature Neuroscience
|December 1, 2021
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Summary
This summary is machine-generated.

Autism's core symptoms may stem from reduced numbers and activity in specific brain cells called inhibitory interneurons (INs). Further research is needed to understand how genetics and environment impact IN development in autism.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Autism spectrum disorder (ASD) presents complex challenges due to diverse genetic and environmental risk factors.
  • Identifying common neural mechanisms underlying ASD symptoms is crucial for therapeutic development.
  • Neuropathological changes in ASD are subtle, necessitating investigation into microstructural alterations.

Purpose of the Study:

  • To review and synthesize current evidence on the role of inhibitory interneurons (INs) in the neural basis of autism.
  • To highlight findings related to the parvalbumin class of INs in ASD.
  • To emphasize the need for research on gene-environment interactions affecting IN development in ASD.

Main Methods:

  • Review of existing scientific literature and research findings.
  • Focus on studies examining the density and activity of parvalbumin-positive INs.
  • Analysis of evidence linking IN dysfunction to ASD symptomatology.

Main Results:

  • Growing evidence suggests a significant role for INs in the neurobiology of autism.
  • Specific findings indicate reduced density and activity within the parvalbumin class of INs in individuals with ASD.
  • These alterations in INs may contribute to the common behavioral and symptom profiles observed in ASD.

Conclusions:

  • Inhibitory interneurons, particularly the parvalbumin-expressing subtype, are implicated in the pathophysiology of autism.
  • Understanding the developmental trajectory of INs under the influence of genetic and environmental factors is critical.
  • Future research should explore gene-environment interactions that impact IN numbers, connectivity, and circuit function in ASD.