Clinical Validation of Novel Immunoassays for Plasma Phosphorylated Tau 217, 212, 181, 231, and Brain-Derived Tau Across the Biochemical Spectrum of Alzheimer's Disease.

ABSTRACT: Plasma biomarkers have emerged as promising less invasive alternatives for Alzheimer's disease (AD) detection. However, the diagnostic performance of phosphorylated tau (p-tau) isoforms remains incompletely validated. In a cohort of 160 patients from a memory clinic, plasma levels of p-tau217, p-tau212, p-tau181, p-tau231, and BD-tau were measured using Single Molecule Array (Simoa) in-house assays, alongside NFL and GFAP. Subjects were classified using the Erlangen Score into Controls (n = 53), neurochemically possible AD (n = 27), and probable AD (n = 80). Plasma concentrations of all p-tau isoforms were significantly elevated in both Possible AD and Probable AD groups compared to Controls (p < 0.001). Notably, p-tau217 exhibited the highest diagnostic accuracy (AUC = 0.954) and correlat

SUBMITTER: Dulewicz M 

PROVIDER: S-EPMC12666730 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature