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Label-free peptide nucleic acid biosensor for visual detection of multiple strains of influenza A virus suitable for field applications

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Title Label-free peptide nucleic acid biosensor for visual detection of multiple strains of influenza A virus suitable for field applications
Not Available
 
Creator Kumar N
Bhatia S
Pateriya AK
Sood R
S Nagarajan
Murugkar HV
Kumar S
Singh P
Singh VP
 
Subject Label-free visual assayInfluenza A virusesPeptide nucleic acidGold nanoparticles
 
Description Not Available
Accurate and rapid diagnosis of Influenza A viruses (IAVs) is challenging because of multiple strains circulating in humans and animal populations, and the emergence of new strains. In this study, we demonstrate a simple and rapid strategy for visual detection of multiple strains of IAVs (H1 to H16 subtypes) using peptide nucleic acid (PNA) as a biosensor and unmodified gold nanoparticles (AuNPs) as a reporter. The design principle of the assay is based on the color change on account of free PNA-induced aggregation of AuNPs in the presence of non-complementary viral RNA sequence and vice-versa. The assay could detect IAV RNA with a visual limit of detection of 2.3 ng. The quantification of RNA with a considerable accuracy on a simple spectrophotometer was achieved on plotting the PNA-induced colorimetric changes (absorption ratio of A640/A520) in the presence of a varying concentration of complementary RNA. As a proof-of-concept, the visual assay was validated on 419 avian clinical samples and receiver operating characteristic (ROC) curve analysis showed a high diagnostic specificity (96.46%, 95% CI = 93.8 to 98.2) and sensitivity (82.41%, 95% CI = 73.9 to 89.1) when RT-qPCR was used as reference test. Hence, the simplicity, rapidity, and universality of this strategy make it a potential candidate visual assay for clinical diagnosis and surveillance of IAVs, especially in the resource-limited settings. The proposed strategy establishes new avenues for developing a simple and rapid diagnostic system for viral infections and biomolecules.
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Date 2020-01-08T06:12:07Z
2020-01-08T06:12:07Z
2019-09-25
 
Type Article
 
Identifier Kumar N, Bhatia S, Pateriya AK, Sood R, S Nagarajan, Murugkar HV, Kumar S, Singh P, and Singh VP. (2019). Label-free peptide nucleic acid biosensor for visual detection of multiple strains of influenza A virus suitable for field applications. Analytica Chimica Acta, 1093: 123-130.
2590-1346
http://krishi.icar.gov.in/jspui/handle/123456789/29384
 
Language English
 
Relation Not Available;
 
Publisher Elsevier B.V.