Researchers at the Hospital for Sick Children (SickKids) in Toronto have identified a gene that may be responsible for the behaviors commonly associated with autism spectrum disorder (ASD). The study, published in the journal Nature on May 13, examined genetic data from 9,349 individuals with ASD and 8,332 without the condition.
Discovery of PTCHD1-AS Gene
The newly pinpointed gene, named PTCHD1-AS, offers a fresh entry point for studying the biology of ASD. According to Dr. Stephen Scherer, senior study author and chief of research at SickKids, this discovery sharpens the understanding of how specific biological pathways relate to key autism traits. The gene may play a role in impaired social interaction and repetitive behaviors such as self-stimulation.
Implications for Future Therapies
The SickKids team believes this research could pave the way for therapies aimed at reducing these impacts. Based on observations in lab mice, disrupting the PTCHD1-AS gene affected synaptic plasticity—the brain's ability to fine-tune signals in regions regulating repetitive behaviors. This provides a molecular pattern for future studies examining the gene's biological effects in the brain.
Expert Insights
Dr. Lisa Bradley, a study author and research associate at The Centre for Applied Genomics at SickKids, noted that the findings suggest a different biology involved with the PTCHD1-AS model compared to other ASD protein-coding models. Dr. Scherer emphasized how small DNA changes can affect complex human behavior, describing it as “amazing how much of our disposition is genetically hardwired.”
Next Steps
The team will next investigate the pathways influenced by PTCHD1-AS to identify targets for future therapies. The impact of autism in Canada is significant, affecting an estimated 1 in 50 children and youth, and roughly 1 in 50 adults, according to the Public Health Agency of Canada. This translates into increased demand on healthcare, education, housing, and employment support.
