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Liu X, Yuan W, Xiao H. Recent progress on DNAzyme-based biosensors for pathogen detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:4917-4937. [PMID: 38984495 DOI: 10.1039/d4ay00934g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Pathogens endanger food safety, agricultural productivity, and human health. Those pathogens are spread through direct/indirect contact, airborne transmission and food/waterborne transmission, and some cause severe health consequences. As the population grows and global connections intensify, the transmission of infectious diseases expands. Traditional detection methods for pathogens still have some shortcomings, such as time-consuming procedures and high operational costs. To fulfil the demands for simple and effective detection, numerous biosensors have been developed. DNAzyme, a unique DNA structure with catalytic activity, is gradually being applied in the field of pathogen detection owing to its ease of preparation and use. In this review, we concentrated on the two main types of DNAzyme, hemin/G-quadruplex DNAzyme (HGD) and RNA-cleaving DNAzyme (RCD), explaining their research progress in pathogen detection. Furthermore, we introduced two additional novel DNAzymes, CLICK 17 DNAzyme and Supernova DNAzyme, which showed promising potential in pathogen detection. Finally, we summarize the strengths and weaknesses of these four DNAzymes and offer feasible recommendations for the development of biosensors.
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Affiliation(s)
- Xingxing Liu
- Laboratory of Viral Pathogenesis & Infection Prevention and Control (Jinan University), Ministry of Education, Guangzhou, 510632, China.
- Department of Immunology and Microbiology, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong, 510632, P. R. China
| | - Wenxu Yuan
- Laboratory of Viral Pathogenesis & Infection Prevention and Control (Jinan University), Ministry of Education, Guangzhou, 510632, China.
- Department of Immunology and Microbiology, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong, 510632, P. R. China
| | - Heng Xiao
- Laboratory of Viral Pathogenesis & Infection Prevention and Control (Jinan University), Ministry of Education, Guangzhou, 510632, China.
- Department of Immunology and Microbiology, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong, 510632, P. R. China
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Song X, Fredj Z, Zheng Y, Zhang H, Rong G, Bian S, Sawan M. Biosensors for waterborne virus detection: Challenges and strategies. J Pharm Anal 2023; 13:1252-1268. [PMID: 38174120 PMCID: PMC10759259 DOI: 10.1016/j.jpha.2023.08.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/20/2023] [Accepted: 08/29/2023] [Indexed: 01/05/2024] Open
Abstract
Waterborne viruses that can be harmful to human health pose significant challenges globally, affecting health care systems and the economy. Identifying these waterborne pathogens is essential for preventing diseases and protecting public health. However, handling complex samples such as human and wastewater can be challenging due to their dynamic and complex composition and the ultralow concentration of target analytes. This review presents a comprehensive overview of the latest breakthroughs in waterborne virus biosensors. It begins by highlighting several promising strategies that enhance the sensing performance of optical and electrochemical biosensors in human samples. These strategies include optimizing bioreceptor selection, transduction elements, signal amplification, and integrated sensing systems. Furthermore, the insights gained from biosensing waterborne viruses in human samples are applied to improve biosensing in wastewater, with a particular focus on sampling and sample pretreatment due to the dispersion characteristics of waterborne viruses in wastewater. This review suggests that implementing a comprehensive system that integrates the entire waterborne virus detection process with high-accuracy analysis could enhance virus monitoring. These findings provide valuable insights for improving the effectiveness of waterborne virus detection, which could have significant implications for public health and environmental management.
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Affiliation(s)
- Xixi Song
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
| | - Zina Fredj
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
| | - Yuqiao Zheng
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
| | - Hongyong Zhang
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
| | - Guoguang Rong
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
| | - Sumin Bian
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
| | - Mohamad Sawan
- CenBRAIN Neurotech, School of Engineering, Westlake University, Hangzhou, 310030, China
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Lee JE, Toushik SH, Park HJ, Kim SA, Shim WB. Rapid detection of Shiga-toxin-producing Escherichia coli O157:H7 based on a colorimetric loop-mediated isothermal amplification (cLAMP) assay using a molecular beacon paired with HRPzyme. Anal Bioanal Chem 2023; 415:4973-4984. [PMID: 37365333 DOI: 10.1007/s00216-023-04803-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023]
Abstract
Contamination by Escherichia coli O157:H7 is considered a threat in the livestock and food industries. Therefore, it is necessary to develop methods for the convenient and rapid detection of Shiga-toxin-producing E. coli O157:H7. This study aimed to develop a colorimetric loop-mediated isothermal amplification (cLAMP) assay using a molecular beacon to rapidly detect E. coli O157:H7. Primers and a molecular beacon were designed for targeting the Shiga-toxin-producing virulence genes (stx1 and stx2) as molecular markers. Additionally, Bst polymerase concentration and amplification conditions for bacterial detection were optimized. The sensitivity and specificity of the assay were also investigated and validated on artificially tainted (100-104 CFU/g) Korean beef samples. The cLAMP assay could detect 1 × 101 CFU/g at 65 °C for both genes, and the assay was confirmed to be specific for E. coli O157:H7. The cLAMP takes about an hour and does not require expensive devices (e.g., thermal cycler and detector). Hence, the cLAMP assay proposed herein can be used in the meat industry as a fast and simple way to detect E. coli O157:H7.
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Affiliation(s)
- Jeong-Eun Lee
- Institute of Smart Farm Research Center, Gyeongsang National University, Gyeongnam, Jinju, 52828, Korea
| | | | - Hyun-Jin Park
- Division of Applied Life Science, Graduate School, Gyeongsang National University, Gyeongnam, Jinju, 52828, Korea
| | - Sol-A Kim
- Division of Applied Life Science, Graduate School, Gyeongsang National University, Gyeongnam, Jinju, 52828, Korea
| | - Won-Bo Shim
- Division of Applied Life Science, Graduate School, Gyeongsang National University, Gyeongnam, Jinju, 52828, Korea.
- Institute of Agricultural and Life Science, Gyeongsang National University, Gyeongnam, Jinju, 52828, Korea.
- Division of Food Science and Technology, Gyeongsang National University, Gyeongnam, Jinju, 52828, Korea.
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Cui WY, Yoo HJ, Li YG, Baek C, Min J. Facile and foldable point-of-care biochip for nucleic acid based-colorimetric detection of murine norovirus in fecal samples using G-quadruplex and graphene oxide coated microbeads. Biosens Bioelectron 2021; 199:113878. [PMID: 34915211 DOI: 10.1016/j.bios.2021.113878] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 11/02/2022]
Abstract
Norovirus is one of the most common causes of gastroenteritis, a disease characterized by diarrhea, vomiting, and stomach pain. A rapid on-site identification of the virus from fecal samples of patients is a prerequisite for accurate medical management. Here, we demonstrate a rapid nucleic acid-based detection platform as an on-site biosensing tool that can concentrate viruses from fecal samples. Moreover, it can perform RNA extraction and identification, and signal amplification using G-quadruplex and hemin containing DNA probes (G-DNA probes) and graphene oxide (GO)-coated microbeads. Briefly, murine noroviruses are lysed without chemicals on the surface of the GO microbeads. Subsequently, the target RNA is hybridized with G-DNA probes, and the resultant RNA/G-DNA probe complex is separated from unbound G-DNA probes using GO beads and is mixed with the detection buffer (ABTS/H2O2). Presence of murine noroviruses causes a colorimetric change of the buffer from colorless to green. Thus, we integrated all processes required to detect murine noroviruses in stool samples in a simple foldable microfluidic chip. Moreover, it can detect 101 pfu of the virus in 30 min in a fecal sample.
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Affiliation(s)
- Wen Ying Cui
- School of Integrative Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul, 06974, South Korea
| | - Hyun Jin Yoo
- School of Integrative Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul, 06974, South Korea
| | - Yun Guang Li
- School of Integrative Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul, 06974, South Korea
| | - Changyoon Baek
- School of Integrative Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul, 06974, South Korea
| | - Junhong Min
- School of Integrative Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul, 06974, South Korea.
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Sande MG, Rodrigues JL, Ferreira D, Silva CJ, Rodrigues LR. Novel Biorecognition Elements against Pathogens in the Design of State-of-the-Art Diagnostics. BIOSENSORS 2021; 11:bios11110418. [PMID: 34821636 PMCID: PMC8615483 DOI: 10.3390/bios11110418] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 05/21/2023]
Abstract
Infectious agents, especially bacteria and viruses, account for a vast number of hospitalisations and mortality worldwide. Providing effective and timely diagnostics for the multiplicity of infectious diseases is challenging. Conventional diagnostic solutions, although technologically advanced, are highly complex and often inaccessible in resource-limited settings. An alternative strategy involves convenient rapid diagnostics which can be easily administered at the point-of-care (POC) and at low cost without sacrificing reliability. Biosensors and other rapid POC diagnostic tools which require biorecognition elements to precisely identify the causative pathogen are being developed. The effectiveness of these devices is highly dependent on their biorecognition capabilities. Naturally occurring biorecognition elements include antibodies, bacteriophages and enzymes. Recently, modified molecules such as DNAzymes, peptide nucleic acids and molecules which suffer a selective screening like aptamers and peptides are gaining interest for their biorecognition capabilities and other advantages over purely natural ones, such as robustness and lower production costs. Antimicrobials with a broad-spectrum activity against pathogens, such as antibiotics, are also used in dual diagnostic and therapeutic strategies. Other successful pathogen identification strategies use chemical ligands, molecularly imprinted polymers and Clustered Regularly Interspaced Short Palindromic Repeats-associated nuclease. Herein, the latest developments regarding biorecognition elements and strategies to use them in the design of new biosensors for pathogens detection are reviewed.
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Affiliation(s)
- Maria G. Sande
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
| | - Joana L. Rodrigues
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
| | - Débora Ferreira
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
| | - Carla J. Silva
- CENTI—Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal;
- CITEVE—Technological Center for the Textile and Clothing Industries of Portugal, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal
| | - Ligia R. Rodrigues
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
- Correspondence: ; Tel.: +351-253601978
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Anantharaj A, Das SJ, Sharanabasava P, Lodha R, Kabra SK, Sharma TK, Medigeshi GR. Visual Detection of SARS-CoV-2 RNA by Conventional PCR-Induced Generation of DNAzyme Sensor. Front Mol Biosci 2020; 7:586254. [PMID: 33425988 PMCID: PMC7793695 DOI: 10.3389/fmolb.2020.586254] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 12/02/2020] [Indexed: 12/23/2022] Open
Abstract
The gold standard for the diagnosis of SARS-CoV-2, the causative agent of COVID-19, is real-time polymerase chain reaction (PCR), which is labor-intensive, expensive, and not widely available in resource-poor settings. Therefore, it is imperative to develop novel, accurate, affordable, and easily accessible assays/sensors to diagnose and isolate COVID-19 cases. To address this unmet need, we utilized the catalytic potential of peroxidase-like DNAzyme and developed a simple visual detection assay for SARS-CoV-2 RNA using a conventional thermal cycler by the PCR-induced generation of DNAzyme sensor. The performance of RT-PCR DNAzyme-based sensor was comparable to that of real-time PCR. The pilot scale validation of RT-PCR DNAzyme-based sensor has shown ~100% sensitivity and specificity in clinical specimens (nasopharyngeal swab, n = 34), with a good correlation (Spearman r = 0.799) with the Ct-value of fluorescence probe-based real-time PCR. These findings clearly indicate the potential of this inexpensive, sensitive, and specific molecular diagnostic test to extend our testing capabilities for the detection of SARS-CoV-2 to curtail COVID-19 transmission.
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Affiliation(s)
- Anbalagan Anantharaj
- National Capital Region - Biotech Science Cluster, Translational Health Science and Technology Institute (THSTI), Faridabad, India
| | - Soon Jyoti Das
- National Capital Region - Biotech Science Cluster, Translational Health Science and Technology Institute (THSTI), Faridabad, India
| | - Patil Sharanabasava
- National Capital Region - Biotech Science Cluster, Translational Health Science and Technology Institute (THSTI), Faridabad, India
| | - Rakesh Lodha
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Sushil K. Kabra
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Tarun Kumar Sharma
- National Capital Region - Biotech Science Cluster, Translational Health Science and Technology Institute (THSTI), Faridabad, India
| | - Guruprasad R. Medigeshi
- National Capital Region - Biotech Science Cluster, Translational Health Science and Technology Institute (THSTI), Faridabad, India
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Peeters B, Safdar S, Daems D, Goos P, Spasic D, Lammertyn J. Solid-Phase PCR-Amplified DNAzyme Activity for Real-Time FO-SPR Detection of the MCR-2 Gene. Anal Chem 2020; 92:10783-10791. [PMID: 32638586 DOI: 10.1021/acs.analchem.0c02241] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The polymerase chain reaction (PCR) has been the gold standard molecular analysis technique for decades and has seen quite some evolution in terms of reaction components, methodology, and readout mechanisms. Nucleic acid enzymes (NAzymes) have been used to further exploit the applications of PCR, but so far the work was limited to the colorimetric G-quadruplex or fluorescent substrate cleaving NAzymes. In this study, a solid-phase, fiber optic surface plasmon resonance (FO-SPR) technique is presented as an alternative readout for PCR utilizing NAzymes. First, the surface cleavage activity of DNAzyme-extended amplicons (DNAzyme-amps) is established, followed by optimization of the PCR conditions, which are required for compatibility with the FO-SPR system. Next, by integrating the complement of a 10-23 DNAzyme into the primer pair, PCR-amplified DNAzyme-amps were generated, tested, and validated on qPCR for the detection of the antimicrobial resistance gene MCR-2. Once validated, this primer concept was developed as a one-step assay, driven by PCR-amplified DNAzymes, for FO-SPR-based sensitive and specific detection. Using gold nanoparticle labeled RNA-DNA hybrid strands as substrate for the DNAzyme, PCR-amplified DNAzyme-amps generated in the presence of MCR-2 gene were monitored in real-time, which resulted in an experimental limit of detection of 4 × 105 copy numbers or 6.6 fM. In addition, the DNAzyme-based FO-PCR assay was able to discriminate between the MCR-1 and MCR-2 genes, to further prove the specificity of this assay. Henceforth, this DNAzyme-based fiber optic PCR assay provides a universally applicable, real-time system for the detection of virtually any target NA, in a specific and sensitive manner.
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Affiliation(s)
- Bernd Peeters
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Leuven B-3001, Belgium
| | - Saba Safdar
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Leuven B-3001, Belgium
| | - Devin Daems
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Leuven B-3001, Belgium
| | - Peter Goos
- Department of Biosystems, Biostatistics Group, KU Leuven, Kasteelpark Arenberg 30, Leuven B-3001, Belgium
| | - Dragana Spasic
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Leuven B-3001, Belgium
| | - Jeroen Lammertyn
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Leuven B-3001, Belgium
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Lee M, Song JH, Shim WB, Chang JY. DNAzyme-based quantitative loop-mediated isothermal amplification for strain-specific detection of starter kimchi fermented with Leuconostoc mesenteroides WiKim32. Food Chem 2020; 333:127343. [PMID: 32663746 DOI: 10.1016/j.foodchem.2020.127343] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 05/23/2020] [Accepted: 06/12/2020] [Indexed: 02/01/2023]
Abstract
Leuconostoc spp. are generally utilized as kimchi starters because of their beneficial effects on kimchi fermentation and sensory characteristics. We developed a DNAzyme-based colorimetric method for measuring the abundance of the kimchi starter Leuconostoc mesenteroides WiKim32. A primer set for loop-mediated isothermal amplification and target-specific DNAzyme was designed based on the WiKim32 nucleotide sequence. In the presence of the target amplicon, DNAzyme bound to it, resulting in negligible amounts of green product. In contrast, with the addition of hemin and in the absence of the target amplicon, DNAzyme fragments not bound to the target amplicon formed G-quadruplex-hemin conjugates, generating a visible green product by oxidizing 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt. There was no cross-reaction with other strains. The method had high detection sensitivity and quantitative capacity in kimchi samples without a requirement for DNA isolation. This strategy provides a rapid, sensitive, and simple detection method with possible industrial applications.
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Affiliation(s)
- Moeun Lee
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Republic of Korea.
| | - Jung Hee Song
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Republic of Korea.
| | - Won Bo Shim
- Department of Agricultural Chemistry and Food Science & Technology, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea.
| | - Ji Yoon Chang
- Research and Development Division, World Institute of Kimchi, Gwangju 61755, Republic of Korea.
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Lee JE, Mun H, Kim SR, Kim MG, Chang JY, Shim WB. A colorimetric Loop-mediated isothermal amplification (LAMP) assay based on HRP-mimicking molecular beacon for the rapid detection of Vibrio parahaemolyticus. Biosens Bioelectron 2020; 151:111968. [DOI: 10.1016/j.bios.2019.111968] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 11/21/2019] [Accepted: 12/14/2019] [Indexed: 12/20/2022]
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Zhao XH, Zhang LZ, Zhao SY, Cui XH, Gong L, Zhao R, Yu BF, Xie J. Silver-ion-mediated Mg2+-dependent DNAzyme activity for amplified fluorescence detection of cysteine. Analyst 2019; 144:1982-1987. [DOI: 10.1039/c8an02308e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Schematic illustration of a DNAzyme-based fluorescent biosensor for amplified Cys detection.
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Affiliation(s)
- Xu-Hua Zhao
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Li-Zhuan Zhang
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Su-Ya Zhao
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Xiao-Hua Cui
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Liang Gong
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices
- College of Life Sciences and Chemistry
- Hunan University of Technology
- Zhuzhou 412007
- China
| | - Rong Zhao
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Bao-Feng Yu
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
| | - Jun Xie
- Department of Biochemistry and Molecular Biology
- Shanxi Medical University
- Taiyuan 030001
- P. R. China
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Batule BS, Kim SU, Mun H, Choi C, Shim WB, Kim MG. Colorimetric Detection of Norovirus in Oyster Samples through DNAzyme as a Signaling Probe. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:3003-3008. [PMID: 29381353 DOI: 10.1021/acs.jafc.7b05289] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Worldwide, norovirus is one of the most associated causes of acute gastroenteritis, which leads to nearly 50 000 child deaths every year in developing countries. Therefore, there is great demand to develop a rapid, low-cost, and accurate detection assay for the foodborne norovirus infection to reduce mortality caused by norovirus. Considering the importance of norovirus, we have demonstrated a highly sensitive and specific colorimetric detection method for analysis of human norovirus genogroups I and II (HuNoV GI and GII) in oyster samples. This is the first report to employ colorimetric HRPzyme-integrated polymerase chain reaction (PCR) for direct norovirus detection from the real shellfish samples. We found that the HRPzyme-integrated PCR method is more sensitive than the gel electrophoresis approach and could detect the HuNoV GI and GII genome up to 1 copy/mL. The specificity of the proposed method was successfully demonstrated for HuNoV GI and GII. Further, we performed testing HuNoVs in the spiked oyster samples, and the HRPzyme-integrated PCR method proved to be an ultrasensitive and selective method for detecting HuNoVs in the real samples. By integration of the proposed method with the portable PCR machine, it would be more reliable to improve food safety by detecting HuNoVs in the different types of shellfish, such as oyster and mussel, at the production field.
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Affiliation(s)
| | | | | | - Changsun Choi
- Department of Food and Nutrition, College of Biotechnology and Natural Resources , Chung-Ang University , Anseong , Gyounggi 17546 , Republic of Korea
| | - Won-Bo Shim
- Department of Agricultural Chemistry and Food Science and Technology , Gyeongsang National University , 900 Gajwa-dong , Jinju , Gyeongnam 660-701 , Republic of Korea
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