Increased Risk of Autism Linked to Y Chromosome, Study Suggests

A Geisinger study published in Nature Communications has found a potential link between the Y chromosome and increased risk of autism spectrum disorder (ASD), potentially explaining the higher prevalence of ASD in males. The study analyzed genetic and ASD diagnosis data on 177,416 patients enrolled in the Simons Foundation Powering Autism Research (SPARK) study and Geisinger's MyCode Community Health Initiative. The findings indicate that individuals with an additional Y chromosome are twice as likely to have an ASD diagnosis, while those with an additional X chromosome showed no change in ASD risk.

Key Takeaways:

• Autism spectrum disorder (ASD) is nearly four times more prevalent among males than females, with a potential link to the Y chromosome.
• Individuals with an additional Y chromosome are twice as likely to have an ASD diagnosis, while those with an additional X chromosome showed no change in ASD risk.
• The study analyzed genetic and ASD diagnosis data on 177,416 patients enrolled in the Simons Foundation Powering Autism Research (SPARK) study and Geisinger's MyCode Community Health Initiative.
• The findings support the hypothesis that the difference in sex chromosomes between males and females may contribute to the disparity in ASD prevalence.
• Further research is needed to identify the specific risk factor associated with the Y chromosome and to determine whether the ASD risk factors associated with sex chromosome aneuploidy explain the sex difference in ASD prevalence.

Statistics:

• 177,416 patients were enrolled in the Simons Foundation Powering Autism Research (SPARK) study and Geisinger's MyCode Community Health Initiative.
• Individuals with an additional Y chromosome are twice as likely to have an ASD diagnosis.
• The study found that the loss of an X or Y chromosome is associated with a large increase in ASD risk.

Sources:

• Geisinger
• Simons Foundation Powering Autism Research (SPARK) study