» Articles » PMID: 39560197

Field-deployable Porcine Epidemic Diarrhea Virus Diagnostics Utilizing CRISPR-Cas13a

Overview
Journal Virulence
Specialty Microbiology
Date 2024 Nov 19
PMID 39560197
Authors
Affiliations
Soon will be listed here.
Abstract

Porcine epidemic diarrhoea virus (PEDV), a pathogenic microorganism that induces epidemic diarrhoea in swine, causes substantial economic damage to swine-farming nations. To prevent and control PEDV infections, the availability of upgraded and rapid virus detection techniques is crucial. The clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated protein (Cas)13a system, namely, programmability of CRISPR RNA (crRNA) and "collateral" promiscuous RNase activity of Cas13a after target RNA identification. In this study, we aimed to develop a recombinase polymerase amplification (RPA)-based CRISPR-Cas13a approach for PEDV diagnosis for the first time. The results showed that up to 10 copies of the target PEDV DNA standard/µL were detected after 40 min at 37 °C. PEDV detection exhibited remarkable specificity compared to that of other selected pathogens. Additionally, this RPA-based CRISPR-Cas13a approach could be used to clinical samples, with similar performance to that of reverse transcription-quantitative polymerase chain reaction (RT - qPCR). The results of our proposed approach were visualized using either lateral flow strips or fluorescence for field-deployable viral diagnostics, thereby facilitating its use in endemic regions. Overall, our proposed approach showed good reliability, sensitivity, and specificity, suggesting that it is applicable for detecting other viruses in diagnosing diseases and inspecting food safety.

References
1.
Kim S, Lee J, Jung J, Kim I, Hyun B, Kim H . Genetic characterization of porcine epidemic diarrhea virus in Korea from 1998 to 2013. Arch Virol. 2015; 160(4):1055-64. PMC: 7086719. DOI: 10.1007/s00705-015-2353-y. View

2.
Sun R, Cai R, Chen Y, Liang P, Chen D, Song C . Outbreak of porcine epidemic diarrhea in suckling piglets, China. Emerg Infect Dis. 2012; 18(1):161-3. PMC: 3381683. DOI: 10.3201/eid1801.111259. View

3.
Abudayyeh O, Gootenberg J, Konermann S, Joung J, Slaymaker I, Cox D . C2c2 is a single-component programmable RNA-guided RNA-targeting CRISPR effector. Science. 2016; 353(6299):aaf5573. PMC: 5127784. DOI: 10.1126/science.aaf5573. View

4.
Kellner M, Koob J, Gootenberg J, Abudayyeh O, Zhang F . SHERLOCK: nucleic acid detection with CRISPR nucleases. Nat Protoc. 2019; 14(10):2986-3012. PMC: 6956564. DOI: 10.1038/s41596-019-0210-2. View

5.
Smargon A, Cox D, Pyzocha N, Zheng K, Slaymaker I, Gootenberg J . Cas13b Is a Type VI-B CRISPR-Associated RNA-Guided RNase Differentially Regulated by Accessory Proteins Csx27 and Csx28. Mol Cell. 2017; 65(4):618-630.e7. PMC: 5432119. DOI: 10.1016/j.molcel.2016.12.023. View