
This study examines various tau protein isoforms in the retinas of patients with early and advanced Alzheimer’s disease (AD) compared to control subjects. Retinal samples from AD patients with mild cognitive impairment (MCI) or dementia and matched controls were analyzed using immunohistochemistry and Nanostring GeoMx digital spatial profiling. Significant increases in tau isoforms, including p-tau, citrullinated-tau, and oligomeric-tau, were found in AD retinas. The study also found strong correlations between retinal tau isoforms and brain pathology, suggesting the potential of retinal biomarkers for noninvasive AD detection and monitoring.
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