Abstract
Electrochemistry provides an array of methods to investigate protein aggregation and determine biomarkers of neurodenenerative diseases. Biosensors detecting monomeric or oligomeric biomarkers of Alzheimer's disease and Parkinson's disease evolved toward femtomolar, multiplexed detection in blood and biological fluids for less invasive diagnosis. The biosensors also serve as complementary tools in studies investigating putative biomarkers for the assessment of patient's cognitive decline. The study of protein aggregation via the direct electrochemical oxidation focused recently on enhanced sensitivity and on establishing correlations between protein structure and aggregation propensity. Departing from classic approaches, nanopore resistive pulse sensing and single-particle collision electrochemistry enable studying aggregates in solution. Growing applications converge toward accurate evaluation of aggregate populations and method adoption beyond proof of principle.
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