Blood protein age measures linked to disease risk in China
Each extra year of kidney protein age above actual age was linked to higher chronic kidney disease risk (hazard ratio, a relative risk measure, 1.19).
4,000 participants
Limit: Organ age estimates were blood-based proxies, not direct measurements of organ aging
Edited by Boris Djordjevic · AgingResearch.News
In 3,977 adults in China, with a mean age of 58 and no prior cardiovascular disease, an observational case-cohort study linked protein-based age estimates to later disease. Researchers combined measurements from two blood protein testing platforms to estimate overall age and ages for 18 organs. They calculated “age gaps” by subtracting each participant’s actual age from these estimates.
Larger overall and organ-specific age gaps were associated with age-related traits and several later diseases, after accounting for actual age and other risk factors. The kidney age gap was associated with higher risks of stroke, chronic liver disease and chronic kidney disease. The overall age gap was also associated with frailty and poorer self-rated health.
Why it matters
For research on age-related diseases, the authors suggest these protein-based aging measures may serve as markers in clinical trials, pending further validation.
Caveats
The observational design cannot establish cause and effect, and the age estimates were blood-based proxies rather than direct measurements of organ aging. The findings do not establish how these measures perform in people with prior cardiovascular disease, who were excluded.
The paper
University of Oxford
EBioMedicine, Jul 29, 2026, Open access
