SAM Composition and Electrode Roughness Affect Performance of a DNA Biosensor for Antibiotic Resistance

Overview

Journal Biosensors (Basel)

Specialty Biotechnology

Date 2019 Feb 10

PMID 30736460

Citations 19

Authors

Adrian Butterworth

Elizabeth Blues

Paul Williamson

Milovan Cardona

Louise Gray

Damion K Corrigan

Affiliations

Soon will be listed here.

Abstract

Antibiotic resistance is a growing concern in the treatment of infectious disease worldwide. Point-of-care (PoC) assays which rapidly identify antibiotic resistance in a sample will allow for immediate targeted therapy which improves patient outcomes and helps maintain the effectiveness of current antibiotic stockpiles. Electrochemical assays offer many benefits, but translation from a benchtop measurement system to low-cost portable electrodes can be challenging. Using electrochemical and physical techniques, this study examines how different electrode surfaces and bio-recognition elements, i.e. the self-assembled monolayer (SAM), affect the performance of a biosensor measuring the hybridisation of a probe for antibiotic resistance to a target gene sequence in solution. We evaluate several commercially available electrodes which could be suitable for PoC testing with different SAM layers and show that electrode selection also plays an important role in overall biosensor performance.

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