SuperAgers' Sharp Memory Not Explained by DNA
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- University of Chicago and TGen researchers analyzed 142 SuperAgers and 89 cognitively average older adults recruited from five U.S. and Canadian sites and found the two groups could not be distinguished by APOE genotype or three Alzheimer's polygenic risk scores.
- The study, published in Alzheimer's Research & Therapy, also found that rare genetic variants previously linked to Alzheimer's protection or resilience were not more common among SuperAgers than in the comparison group.
- Emily Rogalski, PhD, director of the Healthy Aging & Alzheimer's Research Care (HAARC) Center who defined SuperAging in 2008, said genetic testing alone cannot identify SuperAgers the way comprehensive cognitive evaluations can.
- Co-first author Ana Capuano, PhD said the results reinforce that preserving cognitive health involves more than reducing Alzheimer's disease risk alone, pointing to broader biological, behavioral, and social factors.
- Co-senior author Matt Huentelman, PhD of TGen's Early Detection and Prevention Division said common genetic risk factors captured by APOE and current polygenic risk scores do not explain the SuperAging phenotype.
- The research team plans future studies combining cognitive testing with brain imaging, blood biomarkers, neuropathology, immune profiling, sleep and activity monitoring, and social and environmental measurements.
- The work was supported by the National Institute on Aging (U19AG073153), the McKnight Brain Research Foundation through the SuperAging Research Initiative, and the Simons Foundation.
Why it matters: By ruling out inherited genetic risk as the explanation, the 231-person study across five North American sites redirects the scientific search for cognitive resilience toward modifiable factors — sleep, activity, immune health, environment, and other non-genetic mechanisms — meaning exceptional memory in later life may not require winning the genetic lottery. The finding offers an encouraging counter to fatalism about aging: memory decline is not unavoidable, even though the protective forces behind it remain unidentified.
