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Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase

Elimination of malaria is a global health priority. Detecting an asymptomatic carrier of Plasmodium parasites to receive treatment is an important step in achieving this goal. Current available tools for detection of malaria parasites are either expensive, lacking in sensitivity for asymptomatic car...

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Autores principales: Low, Yu Kong, Chan, Jianxiong, Soraya, Gita V., Buffet, Christelle, Abeyrathne, Chathurika D., Huynh, Duc H., Skafidas, Efstratios, Kwan, Patrick, Rogerson, Stephen J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603725/
https://www.ncbi.nlm.nih.gov/pubmed/31146340
http://dx.doi.org/10.3390/s19112446
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author Low, Yu Kong
Chan, Jianxiong
Soraya, Gita V.
Buffet, Christelle
Abeyrathne, Chathurika D.
Huynh, Duc H.
Skafidas, Efstratios
Kwan, Patrick
Rogerson, Stephen J.
author_facet Low, Yu Kong
Chan, Jianxiong
Soraya, Gita V.
Buffet, Christelle
Abeyrathne, Chathurika D.
Huynh, Duc H.
Skafidas, Efstratios
Kwan, Patrick
Rogerson, Stephen J.
author_sort Low, Yu Kong
collection PubMed
description Elimination of malaria is a global health priority. Detecting an asymptomatic carrier of Plasmodium parasites to receive treatment is an important step in achieving this goal. Current available tools for detection of malaria parasites are either expensive, lacking in sensitivity for asymptomatic carriers, or low in throughput. We investigated the sensitivity of an impedimetric biosensor targeting the malaria biomarker Plasmodium lactate dehydrogenase (pLDH). Following optimization of the detection protocol, sensor performance was tested using phosphate-buffered saline (PBS), and then saliva samples spiked with pLDH at various concentrations. The presence of pLDH was determined by analyzing the sensor electrical properties before and after sample application. Through comparing percentage changes in impedance magnitude, the sensors distinguished pLDH-spiked PBS from non-spiked PBS at concentrations as low as 250 pg/mL (p = 0.0008). Percentage changes in impedance magnitude from saliva spiked with 2.5 ng/mL pLDH trended higher than those from non-spiked saliva. These results suggest that these biosensors have the potential to detect concentrations of pLDH up to two logs lower than currently available best-practice diagnostic tools. Successful optimization of this sensor platform would enable more efficient diagnosis of asymptomatic carriers, who can be targeted for treatment, contributing to the elimination of malaria.
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spelling pubmed-66037252019-07-17 Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase Low, Yu Kong Chan, Jianxiong Soraya, Gita V. Buffet, Christelle Abeyrathne, Chathurika D. Huynh, Duc H. Skafidas, Efstratios Kwan, Patrick Rogerson, Stephen J. Sensors (Basel) Article Elimination of malaria is a global health priority. Detecting an asymptomatic carrier of Plasmodium parasites to receive treatment is an important step in achieving this goal. Current available tools for detection of malaria parasites are either expensive, lacking in sensitivity for asymptomatic carriers, or low in throughput. We investigated the sensitivity of an impedimetric biosensor targeting the malaria biomarker Plasmodium lactate dehydrogenase (pLDH). Following optimization of the detection protocol, sensor performance was tested using phosphate-buffered saline (PBS), and then saliva samples spiked with pLDH at various concentrations. The presence of pLDH was determined by analyzing the sensor electrical properties before and after sample application. Through comparing percentage changes in impedance magnitude, the sensors distinguished pLDH-spiked PBS from non-spiked PBS at concentrations as low as 250 pg/mL (p = 0.0008). Percentage changes in impedance magnitude from saliva spiked with 2.5 ng/mL pLDH trended higher than those from non-spiked saliva. These results suggest that these biosensors have the potential to detect concentrations of pLDH up to two logs lower than currently available best-practice diagnostic tools. Successful optimization of this sensor platform would enable more efficient diagnosis of asymptomatic carriers, who can be targeted for treatment, contributing to the elimination of malaria. MDPI 2019-05-29 /pmc/articles/PMC6603725/ /pubmed/31146340 http://dx.doi.org/10.3390/s19112446 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Low, Yu Kong
Chan, Jianxiong
Soraya, Gita V.
Buffet, Christelle
Abeyrathne, Chathurika D.
Huynh, Duc H.
Skafidas, Efstratios
Kwan, Patrick
Rogerson, Stephen J.
Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase
title Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase
title_full Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase
title_fullStr Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase
title_full_unstemmed Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase
title_short Development of an Ultrasensitive Impedimetric Immunosensor Platform for Detection of Plasmodium Lactate Dehydrogenase
title_sort development of an ultrasensitive impedimetric immunosensor platform for detection of plasmodium lactate dehydrogenase
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603725/
https://www.ncbi.nlm.nih.gov/pubmed/31146340
http://dx.doi.org/10.3390/s19112446
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