Inheritance of HLA-Cw7 Associated With Autism Spectrum Disorder (ASD)

Area of Science:

• Immunogenetics
• Neurodevelopmental Disorders
• Autism Spectrum Disorder (ASD) Research

Background:

• Autism spectrum disorder (ASD) affects approximately 1 in 69 children in the U.S.
• The etiology of ASD is largely unknown, but genetic and environmental factors, including immune system involvement, are implicated.
• Specific immune cells (T lymphocytes, monocytes, NK cells) and cytokines, as well as human leukocyte antigen (HLA) alleles, are potential contributors to ASD.

Purpose of the Study:

• To investigate the association between a specific HLA allele and ASD in a large patient cohort.
• To identify potential immune system components involved in ASD pathogenesis.
• To explore if specific HLA alleles correlate with distinct clinical features in ASD patients.

Main Methods:

• Analysis of specimens from 143 patients diagnosed with ASD.
• Assessment of HLA allele frequencies in the ASD cohort.
• Comparison of HLA-Cw7 presence with immune/inflammatory clinical features.

Main Results:

• The HLA-Cw7 allele was found at a significantly higher frequency in individuals with ASD compared to the general population.
• Patients with ASD expressing HLA-Cw7 were more likely to exhibit allergies, food intolerances, and chronic sinusitis.
• HLA-Cw7 is known to stimulate natural killer (NK) cells.

Conclusions:

• The study identifies a significant association between the HLA-Cw7 allele and ASD.
• This suggests that chronic over-activation of NK cells, potentially influenced by HLA-Cw7, may contribute to ASD in individuals with specific immune/inflammatory characteristics.
• The findings may aid in identifying immune system roles in distinct ASD patient subgroups.