A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices
Abstract Background The prevalence and death rate arising from malaria infection, and emergence of other diseases showing similar symptoms to malaria require the development of malaria-specific and sensitive devices for its diagnosis. To address this, the design and fabrication of low-cost, rapid, p...
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ftdoajarticles:oai:doaj.org/article:33f0edf30c69452c9c826c9b85592668 2023-05-15T15:15:47+02:00 A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices Adewoyin Martin Ogunmolasuyi Ronen Fogel Heinrich Hoppe Dean Goldring Janice Limson 2022-06-01T00:00:00Z https://doi.org/10.1186/s12936-022-04187-6 https://doaj.org/article/33f0edf30c69452c9c826c9b85592668 EN eng BMC https://doi.org/10.1186/s12936-022-04187-6 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-022-04187-6 1475-2875 https://doaj.org/article/33f0edf30c69452c9c826c9b85592668 Malaria Journal, Vol 21, Iss 1, Pp 1-15 (2022) Malaria Paper Diagnostics Aptamer Plasmodium falciparum LDH test Blood Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2022 ftdoajarticles https://doi.org/10.1186/s12936-022-04187-6 2022-12-31T02:34:49Z Abstract Background The prevalence and death rate arising from malaria infection, and emergence of other diseases showing similar symptoms to malaria require the development of malaria-specific and sensitive devices for its diagnosis. To address this, the design and fabrication of low-cost, rapid, paper-based analytical devices (µPAD) using surface-immobilized aptamers to detect the presence of a recombinant malarial biomarker—Plasmodium falciparum lactate dehydrogenase (rPfLDH)—is reported in this study. Methods Test zones on paper surfaces were created by covalently immobilizing streptavidin to the paper, subsequently attaching biotinylated aptamers to streptavidin. Aptamers selectively bound rPfLDH. The measurement of captured rPfLDH enzyme activity served as the means of detecting this biomarker. Enzyme activity across three replicate sensors was digitally quantified using the colorimetric Malstat assay. Results Screening of several different aptamers reported in the literature showed that aptamers rLDH7 and 2008s immobilized in this manner specifically recognised and captured PfLDH. Using rLDH7, the sensitivity of the µPAD sensor was evaluated and the µPAD sensor was applied for preferential detection of rPfLDH, both in buffered solutions of the protein and in spiked serum and red blood cell lysate samples. In buffered solutions, the test zone of the µPAD sensor exhibited a K D of 24 ± 11 nM and an empirical limit of detection of 17 nM, respectively, a limit similar to commercial antibody-based sensors exposed to rPfLDH. The specific recognition of 133 nM rPfLDH in undiluted serum and blood samples was demonstrated by the µPAD. Conclusion The reported µPAD demonstrates the potential of integrating aptamers into paper-based malarial rapid diagnostic tests. Graphical Abstract The assembly of µPAD sensors using APTEC assay principles for the detection the malarial biomarker, lactate dehydrogenase enzymes from Plasmodium falciparum (PfLDH). The aptamers immobilized at the test zones capture the PfLDH in ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 21 1 |
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ftdoajarticles |
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English |
topic |
Malaria Paper Diagnostics Aptamer Plasmodium falciparum LDH test Blood Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Malaria Paper Diagnostics Aptamer Plasmodium falciparum LDH test Blood Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Adewoyin Martin Ogunmolasuyi Ronen Fogel Heinrich Hoppe Dean Goldring Janice Limson A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices |
topic_facet |
Malaria Paper Diagnostics Aptamer Plasmodium falciparum LDH test Blood Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background The prevalence and death rate arising from malaria infection, and emergence of other diseases showing similar symptoms to malaria require the development of malaria-specific and sensitive devices for its diagnosis. To address this, the design and fabrication of low-cost, rapid, paper-based analytical devices (µPAD) using surface-immobilized aptamers to detect the presence of a recombinant malarial biomarker—Plasmodium falciparum lactate dehydrogenase (rPfLDH)—is reported in this study. Methods Test zones on paper surfaces were created by covalently immobilizing streptavidin to the paper, subsequently attaching biotinylated aptamers to streptavidin. Aptamers selectively bound rPfLDH. The measurement of captured rPfLDH enzyme activity served as the means of detecting this biomarker. Enzyme activity across three replicate sensors was digitally quantified using the colorimetric Malstat assay. Results Screening of several different aptamers reported in the literature showed that aptamers rLDH7 and 2008s immobilized in this manner specifically recognised and captured PfLDH. Using rLDH7, the sensitivity of the µPAD sensor was evaluated and the µPAD sensor was applied for preferential detection of rPfLDH, both in buffered solutions of the protein and in spiked serum and red blood cell lysate samples. In buffered solutions, the test zone of the µPAD sensor exhibited a K D of 24 ± 11 nM and an empirical limit of detection of 17 nM, respectively, a limit similar to commercial antibody-based sensors exposed to rPfLDH. The specific recognition of 133 nM rPfLDH in undiluted serum and blood samples was demonstrated by the µPAD. Conclusion The reported µPAD demonstrates the potential of integrating aptamers into paper-based malarial rapid diagnostic tests. Graphical Abstract The assembly of µPAD sensors using APTEC assay principles for the detection the malarial biomarker, lactate dehydrogenase enzymes from Plasmodium falciparum (PfLDH). The aptamers immobilized at the test zones capture the PfLDH in ... |
format |
Article in Journal/Newspaper |
author |
Adewoyin Martin Ogunmolasuyi Ronen Fogel Heinrich Hoppe Dean Goldring Janice Limson |
author_facet |
Adewoyin Martin Ogunmolasuyi Ronen Fogel Heinrich Hoppe Dean Goldring Janice Limson |
author_sort |
Adewoyin Martin Ogunmolasuyi |
title |
A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices |
title_short |
A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices |
title_full |
A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices |
title_fullStr |
A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices |
title_full_unstemmed |
A microfluidic paper analytical device using capture aptamers for the detection of PfLDH in blood matrices |
title_sort |
microfluidic paper analytical device using capture aptamers for the detection of pfldh in blood matrices |
publisher |
BMC |
publishDate |
2022 |
url |
https://doi.org/10.1186/s12936-022-04187-6 https://doaj.org/article/33f0edf30c69452c9c826c9b85592668 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 21, Iss 1, Pp 1-15 (2022) |
op_relation |
https://doi.org/10.1186/s12936-022-04187-6 https://doaj.org/toc/1475-2875 doi:10.1186/s12936-022-04187-6 1475-2875 https://doaj.org/article/33f0edf30c69452c9c826c9b85592668 |
op_doi |
https://doi.org/10.1186/s12936-022-04187-6 |
container_title |
Malaria Journal |
container_volume |
21 |
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1 |
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1766346136523636736 |