An electrochemical scaffold sensor for rapid syphilis diagnosis

The Analyst
Nathan E OgdenKevin W Plaxco

Abstract

The faster a disease can be diagnosed, the sooner effective treatment can be initiated, motivating a drive to replace standard laboratory techniques with point-of-care technologies that return answers in minutes rather than hours. Thus motivated, we describe the development of an E-DNA scaffold sensor for the rapid and convenient measurement of antibodies diagnostic of syphilis. To achieve this (and in contrast to previous sensors of this class, which relied on single, linear epitopes for detection), we utilized a near full-length antigen as the sensor's recognition element, allowing us to simultaneously display multiple epitopes. The resultant sensor is able to detect antibodies against Treponema pallidum pallidum, the causative agent of syphilis, at clinically relevant concentrations in samples in less than 10 min. Preliminary results obtained using sero-positive and sero-negative human samples suggest the clinical sensitivity and specificity of the approach compare well to current gold-standard tests, while being simple and rapid enough to deploy at the point of care.

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Citations

Mar 3, 2020·Frontiers in Microbiology·André Luís Elias MoreiraClayton Luiz Borges
Mar 10, 2021·Nature Chemistry·Jagotamoy DasShana O Kelley
Jan 14, 2021·ACS Sensors·Yi PengRichard M Crooks
Apr 2, 2021·Journal of the American Chemical Society·Amanda CliffordShana O Kelley

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Datasets Mentioned

BETA
M74825

Methods Mentioned

BETA
enzyme linked immunosorbent assays
biosensors
ELISA

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