Immune Endophenotypes in Children With Autism Spectrum Disorder

Area of Science:

• Neuroscience
• Immunology
• Developmental Pediatrics

Background:

• Autism spectrum disorder (ASD) presents with social communication deficits and repetitive behaviors.
• Previous studies show varied immunological findings in children with ASD.
• Investigating immune response heterogeneity is crucial for understanding ASD.

Purpose of the Study:

• To examine the diversity of immune profiles in boys with ASD.
• To correlate immune responses with behavioral and developmental outcomes in ASD.

Main Methods:

• Peripheral blood mononuclear cells from boys with ASD (n=50) and controls (n=16) were stimulated.
• Cytokine production was measured after stimulation with lipopolysaccharide or phytohemagglutinin.
• ASD participants were clustered into subgroups based on immune profiles and assessed for behavioral outcomes.

Main Results:

• ASD children with a proinflammatory profile (lipopolysaccharide) showed greater developmental impairment, social affect deficits, sleep disturbances, and aggression.
• ASD children with activated T cell profiles (phytohemagglutinin) also exhibited more developmental impairment.
• Immune profiles were linked to specific behavioral characteristics in the ASD cohort.

Conclusions:

• Children with ASD can be phenotypically characterized by their immune profiles.
• Innate proinflammatory responses or T cell activation in ASD correlate with more severe behavioral impairments.
• Potential immune subphenotypes within ASD may be associated with greater behavioral severity.