Point-of-care test of blood Plasmodium RNA within a Pasteur pipette using a novel isothermal amplification without nucleic acid purification.
Isothermal probe amplification
Malaria
Nucleic acid extraction-free
Pasteur pipette
Point-of-care test
Journal
Infectious diseases of poverty
ISSN: 2049-9957
Titre abrégé: Infect Dis Poverty
Pays: England
ID NLM: 101606645
Informations de publication
Date de publication:
31 Oct 2024
31 Oct 2024
Historique:
received:
13
05
2024
accepted:
16
10
2024
medline:
31
10
2024
pubmed:
31
10
2024
entrez:
31
10
2024
Statut:
epublish
Résumé
Resource-limited regions face a greater burden of infectious diseases due to limited access to molecular tests, complicating timely diagnosis and management. Current molecular point-of-care tests (POCTs) either come with high costs or lack adequate sensitivity and specificity. To facilitate better prevention and control of infectious diseases in underserved areas, we seek to address the need for molecular POCTs that better align with the World Health Organization (WHO)'s ASSURED criteria-Affordable, Sensitive, Specific, User-friendly, Rapid and robust, Equipment-free, and Deliverable to end users. A novel molecular POCT, Pasteur Pipette-assisted isothermal probe amplification (pp-IPA), was developed for malaria detection. Without any microfluidics, this method captures Plasmodium 18S rRNA in a modified Pasteur pipette using tailed genus-specific probes. After washing, the bound tailed probes are ligated to form a template for subsequent novel isothermal probe amplification using a pair of generic primers, bypassing nucleic acid extraction and reverse transcription. The method was assessed using cultured Plasmodium and compared with real-time quantitative reverse transcription PCR (RT-qPCR) or reverse transcription loop-mediated isothermal amplification (RT-LAMP) in clinical blood samples. The entire assay is completed in 60-80 min with minimal hands-on time, using only a Pasteur pipette and a water bath. The pp-IPA's analytical sensitivity is 1.28 × 10 Designed to improve the accessibility of molecular detection in resource-limited settings, pp-IPA's simplicity, affordability, high sensitivity/specificity, and minimal equipment requirements make it a promising point-of-care pathogen identification tool in resource-constrained regions.
Sections du résumé
BACKGROUND
BACKGROUND
Resource-limited regions face a greater burden of infectious diseases due to limited access to molecular tests, complicating timely diagnosis and management. Current molecular point-of-care tests (POCTs) either come with high costs or lack adequate sensitivity and specificity. To facilitate better prevention and control of infectious diseases in underserved areas, we seek to address the need for molecular POCTs that better align with the World Health Organization (WHO)'s ASSURED criteria-Affordable, Sensitive, Specific, User-friendly, Rapid and robust, Equipment-free, and Deliverable to end users.
METHODS
METHODS
A novel molecular POCT, Pasteur Pipette-assisted isothermal probe amplification (pp-IPA), was developed for malaria detection. Without any microfluidics, this method captures Plasmodium 18S rRNA in a modified Pasteur pipette using tailed genus-specific probes. After washing, the bound tailed probes are ligated to form a template for subsequent novel isothermal probe amplification using a pair of generic primers, bypassing nucleic acid extraction and reverse transcription. The method was assessed using cultured Plasmodium and compared with real-time quantitative reverse transcription PCR (RT-qPCR) or reverse transcription loop-mediated isothermal amplification (RT-LAMP) in clinical blood samples.
RESULTS
RESULTS
The entire assay is completed in 60-80 min with minimal hands-on time, using only a Pasteur pipette and a water bath. The pp-IPA's analytical sensitivity is 1.28 × 10
CONCLUSIONS
CONCLUSIONS
Designed to improve the accessibility of molecular detection in resource-limited settings, pp-IPA's simplicity, affordability, high sensitivity/specificity, and minimal equipment requirements make it a promising point-of-care pathogen identification tool in resource-constrained regions.
Identifiants
pubmed: 39478546
doi: 10.1186/s40249-024-01255-8
pii: 10.1186/s40249-024-01255-8
doi:
Substances chimiques
RNA, Protozoan
0
RNA, Ribosomal, 18S
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
80Subventions
Organisme : National Major Science and Technology Projects of China
ID : 2018ZX10101001
Informations de copyright
© 2024. The Author(s).
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