Sunnybrook blood study links menopause molecular shifts to later cognitive risk

Sunnybrook-led scientists say they have shown for the first time that highly sensitive blood tests can pick up menopause-related molecular changes tied to brain aging, in findings published in Nature Medicine and announced from Toronto on Thursday.

Lead author Madeline Wood Alexander and colleagues measured hundreds of blood molecules in 80 women aged 43–58 grouped as pre-, peri- and postmenopausal. Compared with earlier stages, postmenopausal women showed higher levels of markers linked to inflammation, synapses and Alzheimer’s-related biology. Women with night sweats showed the largest inflammatory rises, and the signals tracked with lower estradiol and higher follicle-stimulating hormone. The postmenopausal levels did not exceed those in age-matched men, suggesting a compressed midlife catch-up rather than women overshooting male baselines.

The team replicated menopause-related blood shifts in 2,814 age-matched UK Biobank women and reported accelerated biological aging across organs, including the brain. Across four further cohorts totalling nearly 12,000 older postmenopausal women, higher menopause-related blood molecules were associated with greater later declines in memory and thinking and higher Alzheimer’s dementia risk. Co-author Dr. Jennifer Rabin stressed menopause is not framed as causing dementia: most women will not develop dementia, and the work is not yet ready to predict individual risk.

Researchers from Sunnybrook, the University of Toronto, UCSF and several U.S. centres collaborated. They cast the menopause transition as a possible window for studying modifiable brain-health pathways, while urging more work before any clinical screening use.

This article is for general information only and is not a substitute for professional medical advice. Consult a qualified clinician about your own health.

Sources: Sunnybrook Research Institute; PubMed abstract (Nature Medicine).