Blood Marker pTau181 Signals Dementia Risk in 45-Year-Olds, Study Tracks Early Warning Window
Updated
Updated · HuffPost UK · Jun 30
Blood Marker pTau181 Signals Dementia Risk in 45-Year-Olds, Study Tracks Early Warning Window
3 articles · Updated · HuffPost UK · Jun 30
Summary
A Springer Nature paper found 45-year-olds with higher blood levels of pTau181 were more likely to report concerns about memory and thinking, linking the biomarker to possible earlier dementia risk.
Those concerns appeared as subjective cognitive decline: participants noticed persistent changes in cognition, but standard cognitive tests did not show measurable impairment.
MRI scans and other investigations also found no structural brain changes typically associated with dementia, suggesting any risk signal may emerge years before visible damage.
Lead author Ashleigh Barrett-Young said pTau181 reflects risk rather than certainty, and researchers will keep following the cohort to see whether elevated levels at 45 predict later disease.
The findings matter because dementia affects about 1 in 11 people aged 65 and over in the UK, while risk roughly doubles every five years after around age 70.