Redox-Active Polyphenol Red Molecularly Imprinted Polymers on Porous Gold Electrodes for Ultrasensitive, AI-Assisted Detection of Alzheimer's Biomarkers in Undiluted Biofluids.

ABSTRACT: Early diagnosis of Alzheimer's disease (AD) is hindered by the high cost, complexity, and centralization of current diagnostic platforms such as enzyme-linked immunosorbent assay (ELISA) and single-molecule array (SIMOA). Here, an integrated point-of-care (PoC) biosensing platform is reported based on redox-active polyphenol red molecularly imprinted polymers (pPhR MIPs) deposited on highly porous gold (HPG) electrodes for the ultrasensitive, reagent-free detection of phosphorylated tau 181 (p-tau 181) in undiluted plasma and serum. The unique electrochemical interface combines the signal-enhancing properties of HPG with the redox functionality of pPhR, eliminating the need for external redox probes. The resulting sensor achieves a limit of detection (LOD) of 980 fg mL^-1 and sen

SUBMITTER: Deshpande S 

PROVIDER: S-EPMC12716194 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature