The Role of Autism Risk Genes in Cognitive and Brain Aging Outcomes in Autistic Adults

Compared to people without autism, the risk of Alzheimer’s disease is 2.6 times higher in people with autism, and they are twice as likely to die prematurely – with autistic women being at even higher risk for premature death. However, very few research studies focus on or even include autistic adults who are middle aged and older. This project capitalizes on a cohort of older autistic and neurotypical adults who receive assessments of brain structure, memory function, and intellectual ability at multiple timepoints as they age. Integrating brain imaging, genomic techniques, and statistical tools, this researcher will determine if autism risk genes also lead to memory decline and how these genes affect brain structure and the cortical thinning that is typical in all older adults. In addition, they will examine sex differences in autistic adult memory and changes in the memory system across age, with the goal of identifying sex-specific biomarkers that can be used to predict who will be most vulnerable to adverse aging outcomes. This work has implications for the future development of precision medicine and other interventions that will increase the quality of life for older adults across the spectrum.