Stanford’s Wyss-Coray lab harnesses large-scale plasma proteomics and LASSO modeling to derive organ-specific ‘age gaps’ for 11 human organs. They identify organ-enriched plasma proteins and train age predictors on UK Biobank data (~45,000 participants). The resulting age gaps correlate with lifestyle factors, forecast incident diseases—from heart failure to Alzheimer’s—and reveal that youthful brain and immune profiles confer substantial longevity benefits.
Key points
- Applied Olink plasma proteomics (~3,000 proteins) with GTEx‐defined organ enrichment to train LASSO regression models for 11 organ‐specific age predictions.
- Calculated z-scored ‘age gaps’ that forecasted 15 incident diseases, including heart failure and Alzheimer’s, with hazard ratios up to 8.3 for multi‐organ aging.
- Demonstrated that extreme brain and immune age gaps rival APOE genotype effects—aged brains triple Alzheimer’s risk and youthful profiles halve mortality risk.
Why it matters: This plasma proteomics approach enables noninvasive tracking of organ health, offering personalized disease risk profiling and new targets for longevity interventions.
Q&A
- What is an “age gap”?
- How are organ-enriched proteins chosen?
- Why use plasma proteomics for aging?
- How do brain age gaps compare to APOE genotypes?