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Lv L, Mu H, Li S, Gao J, Liu M, Niu S, Xu G, Fu L, Song Z, Yang L. Establishment of a One-Pot RAA-CRISPR/Cas13a Assay-Based TGEV S Gene Detection. Vet Sci 2025; 12:464. [PMID: 40431557 PMCID: PMC12115519 DOI: 10.3390/vetsci12050464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2025] [Revised: 05/04/2025] [Accepted: 05/08/2025] [Indexed: 05/29/2025] Open
Abstract
Porcine transmissible gastroenteritis virus (TGEV) is a highly contagious pathogen causing severe diarrhea in pigs, particularly piglets, leading to significant economic losses. Distinguishing TGEV from the genetically similar porcine respiratory coronavirus (PRCV) remains challenging due to their high genomic homology. In this study, we developed a one-pot assay combining recombinase-aided amplification (RAA) and CRISPR/Cas13a technology, targeting the TGEV S gene. This method was optimized for sensitivity and specificity, with orthogonal tests determining the optimal reagent concentrations. The assay achieved a detection limit of 4.13 copies/µL within 40 min at 37 °C, demonstrating no cross-reactivity with other porcine viruses. Clinical validation on 140 samples showed 100% concordance with RT-qPCR and RT-PCR results. Since the established method is completed in a single reaction tube, it eliminates the need for step-by-step operations, simplifying the process and reducing the risk of cross-contamination and false positives in subsequent tests. Overall, this assay shows promising potential for TGEV detection.
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Affiliation(s)
- Lindan Lv
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
| | - Hao Mu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Chongqing Research Center of Veterinary Biologicals Engineering and Technology, Chongqing 400715, China
| | - Shaomei Li
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Chongqing Research Center of Veterinary Biologicals Engineering and Technology, Chongqing 400715, China
| | - Jieqi Gao
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
| | - Mingni Liu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
| | - Shuizhu Niu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
| | - Guoyang Xu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Chongqing Research Center of Veterinary Biologicals Engineering and Technology, Chongqing 400715, China
| | - Lizhi Fu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Chongqing Research Center of Veterinary Biologicals Engineering and Technology, Chongqing 400715, China
| | - Zhenhui Song
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
| | - Liu Yang
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; (L.L.); (H.M.); (S.L.); (J.G.); (M.L.); (S.N.); (G.X.); (L.F.)
- College of Veterinary Medicine, Southwest University, Chongqing 400715, China
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- Chongqing Research Center of Veterinary Biologicals Engineering and Technology, Chongqing 400715, China
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Lamprou E, Kalligosfyri PM, Kalogianni DP. Beyond Traditional Lateral Flow Assays: Enhancing Performance Through Multianalytical Strategies. BIOSENSORS 2025; 15:68. [PMID: 39996970 PMCID: PMC11853705 DOI: 10.3390/bios15020068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2024] [Revised: 01/18/2025] [Accepted: 01/21/2025] [Indexed: 02/26/2025]
Abstract
Multiplex lateral flow assays are one of the greatest advancements in the world of rapid diagnostics, achieving the performance of several tests in one. These tests meet the basic requirements of increasing ease of use, low detection limit, and high specificity, as they combine the use of novel strategies, such as the exploitation of multiple detection labels, and a variety of amplification methods. These tests have proven their usefulness in many different areas, including clinical diagnostics, food, and environmental monitoring. In this review paper, we attempt to highlight and discuss the predominant changes in multianalyte LFAs, as related to their principle, their development, and their combination with other methods. Attention is paid to their flexibility and the challenges associated with the use of LFA arrays, including strategies to improve the detectability, sensitivity, and reliability of the assays. Therefore, this review emphasizes the current advances in the field to underline the possible impact of multiplex LFAs on the future of diagnostics and analytical sciences.
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Affiliation(s)
- Eleni Lamprou
- Department of Chemistry, University of Patras, Rio, GR26504 Patras, Greece;
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You D, Xu T, Huang BZ, Wu F, Deng LS, Liu ZY, Ge LP, Liu ZH, Sun J, Zeng X, Zhou YC, Lai SY, Ai YR, Huang JB, Zhu L, Xu ZW. Rapid, sensitive, and visual detection of pseudorabies virus with an RPA-CRISPR/EsCas13d-based dual-readout portable platform. Anal Chim Acta 2024; 1318:342918. [PMID: 39067912 DOI: 10.1016/j.aca.2024.342918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/25/2024] [Accepted: 06/26/2024] [Indexed: 07/30/2024]
Abstract
Pseudorabies viruses (PRV) pose a major threat to the global pig industry and public health. Rapid, intuitive, affordable, and accurate diagnostic testing is critical for controlling and eradicating infectious diseases. In this study, a portable detection platform based on RPA-CRISPR/EsCas13d was developed. The platform exhibits high sensitivity (1 copy/μL), good specificity, and no cross-reactivity with common pathogens. The platform uses rapid preamplification technology to provide visualization results (lateral flow assays or visual fluorescence) within 1 h. Fifty pig samples (including tissues, oral fluids, and serum) were tested using this platform and real-time quantitative polymerase chain reaction (qPCR), showing 34.0 % (17 of 50) PRV positivity with the portable CRISPR/EsCas13d dual-readout platform, consistent with the qPCR results. These results highlight the stability, sensitivity, efficiency, and low equipment requirements of the portable platform. Additionally, a novel point-of-care test is being developed for clinical use in remote rural and resource-limited areas, which could be a prospective measure for monitoring the progression of pseudorabies and other infectious diseases worldwide.
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Affiliation(s)
- Dong You
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Tong Xu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Bing-Zhou Huang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Fang Wu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Li-Shuang Deng
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhe-Yan Liu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | | | | | - Jing Sun
- ChongQing Academy of Animal Sciences, China
| | - Xiu Zeng
- ChongQing Academy of Animal Sciences, China
| | - Yuan-Cheng Zhou
- Key Laboratory of Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, China; Livestock and Poultry Biological Products Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, China
| | - Si-Yuan Lai
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yan-Ru Ai
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Jian-Bo Huang
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Ling Zhu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, China.
| | - Zhi-Wen Xu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Chengdu, China.
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