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Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10

The current study reports on the development of a rapid and cost-effective TB-antigen diagnostic test for the detection of Mycobacterium biomarkers from non-sputum-based samples. Two gold nanoparticle (AuNP)-based rapid diagnostic tests (RDTs) in the form of lateral flow immunoassays (LFIAs) were de...

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Autores principales: Seele, Palesa Pamela, Dyan, Busiswa, Skepu, Amanda, Maserumule, Charlotte, Sibuyi, Nicole Remaliah Samantha
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10046134/
https://www.ncbi.nlm.nih.gov/pubmed/36979566
http://dx.doi.org/10.3390/bios13030354
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author Seele, Palesa Pamela
Dyan, Busiswa
Skepu, Amanda
Maserumule, Charlotte
Sibuyi, Nicole Remaliah Samantha
author_facet Seele, Palesa Pamela
Dyan, Busiswa
Skepu, Amanda
Maserumule, Charlotte
Sibuyi, Nicole Remaliah Samantha
author_sort Seele, Palesa Pamela
collection PubMed
description The current study reports on the development of a rapid and cost-effective TB-antigen diagnostic test for the detection of Mycobacterium biomarkers from non-sputum-based samples. Two gold nanoparticle (AuNP)-based rapid diagnostic tests (RDTs) in the form of lateral flow immunoassays (LFIAs) were developed for detection of immunodominant TB antigens, the 6 kDa early secreted antigen target EsxA (ESAT-6) and the 10 kDa culture filtrate protein EsxB (CFP-10). AuNPs were synthesized using the Turkevich method and characterized by UV-vis spectrophotometer and transmission electron microscope (TEM). The AuNP–detection probe conjugation conditions were determined by comparing the stability of 14 nm AuNPs at different pH conditions, following salt challenge. Thereafter, ESAT-6 and CFP-10 antibodies were conjugated to the AuNPs and used for the colorimetric detection of TB antigens. Selection of the best detection and capture antibody pairs was determined by Dot spotting. The limits of detection (LODs) for the LFIAs were evaluated by dry testing. TEM results showed that the 14 nm AuNPs were mostly spherical and well dispersed. The ESAT-6 LFIA prototype had an LOD of 0.0625 ng/mL versus the CFP-10 with an LOD of 7.69 ng/mL. Compared to other studies in the literature, the LOD was either similar or lower, outperforming them. Moreover, in some of the previous studies, an enrichment/extraction step was required to improve on the LOD. In this study, the LFIAs produced results within 15 min and could be suitable for use at PoCs either in clinics, mobile clinics, hospitals or at home by the end user. However, further studies need to be conducted to validate their use in clinical samples.
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spelling pubmed-100461342023-03-29 Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10 Seele, Palesa Pamela Dyan, Busiswa Skepu, Amanda Maserumule, Charlotte Sibuyi, Nicole Remaliah Samantha Biosensors (Basel) Article The current study reports on the development of a rapid and cost-effective TB-antigen diagnostic test for the detection of Mycobacterium biomarkers from non-sputum-based samples. Two gold nanoparticle (AuNP)-based rapid diagnostic tests (RDTs) in the form of lateral flow immunoassays (LFIAs) were developed for detection of immunodominant TB antigens, the 6 kDa early secreted antigen target EsxA (ESAT-6) and the 10 kDa culture filtrate protein EsxB (CFP-10). AuNPs were synthesized using the Turkevich method and characterized by UV-vis spectrophotometer and transmission electron microscope (TEM). The AuNP–detection probe conjugation conditions were determined by comparing the stability of 14 nm AuNPs at different pH conditions, following salt challenge. Thereafter, ESAT-6 and CFP-10 antibodies were conjugated to the AuNPs and used for the colorimetric detection of TB antigens. Selection of the best detection and capture antibody pairs was determined by Dot spotting. The limits of detection (LODs) for the LFIAs were evaluated by dry testing. TEM results showed that the 14 nm AuNPs were mostly spherical and well dispersed. The ESAT-6 LFIA prototype had an LOD of 0.0625 ng/mL versus the CFP-10 with an LOD of 7.69 ng/mL. Compared to other studies in the literature, the LOD was either similar or lower, outperforming them. Moreover, in some of the previous studies, an enrichment/extraction step was required to improve on the LOD. In this study, the LFIAs produced results within 15 min and could be suitable for use at PoCs either in clinics, mobile clinics, hospitals or at home by the end user. However, further studies need to be conducted to validate their use in clinical samples. MDPI 2023-03-06 /pmc/articles/PMC10046134/ /pubmed/36979566 http://dx.doi.org/10.3390/bios13030354 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Seele, Palesa Pamela
Dyan, Busiswa
Skepu, Amanda
Maserumule, Charlotte
Sibuyi, Nicole Remaliah Samantha
Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10
title Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10
title_full Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10
title_fullStr Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10
title_full_unstemmed Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10
title_short Development of Gold-Nanoparticle-Based Lateral Flow Immunoassays for Rapid Detection of TB ESAT-6 and CFP-10
title_sort development of gold-nanoparticle-based lateral flow immunoassays for rapid detection of tb esat-6 and cfp-10
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10046134/
https://www.ncbi.nlm.nih.gov/pubmed/36979566
http://dx.doi.org/10.3390/bios13030354
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