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PfHRP2 Detection Using Plasmonic Optrodes: Performance Analysis

Overview
Journal Malar J
Publisher Biomed Central
Specialty Tropical Medicine
Date 2021 Jul 29
PMID 34320995
Citations 5
Authors
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Abstract

Background: Early malaria diagnosis and its profiling require the development of new sensing platforms enabling rapid and early analysis of parasites in blood or saliva, aside the widespread rapid diagnostic tests (RDTs).

Methods: This study shows the performance of a cost-effective optical fiber-based solution to target the presence of Plasmodium falciparum histidine-rich protein 2 (PfHRP2). Unclad multimode optical fiber probes are coated with a thin gold film to excite Surface Plasmon Resonance (SPR) yielding high sensitivity to bio-interactions between targets and bioreceptors grafted on the metal surface.

Results: Their performances are presented in laboratory conditions using PBS spiked with growing concentrations of purified target proteins and within in vitro cultures. Two probe configurations are studied through label-free detection and amplification using secondary antibodies to show the possibility to lower the intrisic limit of detection.

Conclusions: As malaria hits millions of people worldwide, the improvement and multiplexing of this optical fiber technique can be of great interest, especially for a future purpose of using multiple receptors on the fiber surface or several coated-nanoparticles as amplifiers.

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Review of Microdevices for Hemozoin-Based Malaria Detection.

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Recent Advances in Biomedical Photonic Sensors: A Focus on Optical-Fibre-Based Sensing.

Ochoa M, Algorri J, Roldan-Varona P, Rodriguez-Cobo L, Lopez-Higuera J Sensors (Basel). 2021; 21(19).

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