1
|
Xiao F, Li W, Wang Z, Xu Q, Song Y, Huang J, Bai X, Xu H. Smartphone-assisted biosensor based on broom-like bacteria-specific magnetic enrichment platform for colorimetric detection of Listeria monocytogenes. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132250. [PMID: 37567141 DOI: 10.1016/j.jhazmat.2023.132250] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 07/28/2023] [Accepted: 08/06/2023] [Indexed: 08/13/2023]
Abstract
Pathogenic bacteria contamination poses a major threat to human health. The detection of low-abundance bacteria in complex samples has always been a knotty problem, and high-sensitivity bacterial detection remains challenging. In this work, a novel magnetic platform with high enrichment efficiency for L. monocytogenes was developed. The magnetic platform was designed by branched polyglutamic acid-mediated indirect coupling of cefepime on magnetic nanoparticles (Cefe-PGA-MNPs), and the specific enrichment of low-abundance L. monocytogenes in real samples was achieved by an external magnet, with a capture efficiency over 90%. A controllable and highly active platinum-palladium nanozyme was synthesized and further introduced in the magnetic nanoplatform for the construction of enzymatic colorimetric biosensor. The total detection time for L. monocytogenes was within 100 min. The colorimetric signals generated by labelled nanozyme were corresponding to different concentrations of L. monocytogenes, with a limit of detection (LOD) of 3.1 × 101 CFU/mL, and high reliability and accuracy (with a recovery rate ranging from 96.5% to 116.4%) in the test of real samples. The concept of the developed method is applicable to various fields of biosensing that rely on magnetic separation platforms.
Collapse
Affiliation(s)
- Fangbin Xiao
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Weiqiang Li
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Zhixing Wang
- Zhejiang Rural Commercial Digital Technology Co., Ltd., Hangzhou 310016, PR China
| | - Qian Xu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Yang Song
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Jin Huang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Xuekun Bai
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, PR China.
| |
Collapse
|
2
|
Xiao F, Wang Z, Li W, Qi W, Bai X, Xu H. Cefepime-modified magnetic nanoparticles and enzymatic colorimetry for the detection of Listeria monocytogenes in lettuces. Food Chem 2023; 409:135296. [PMID: 36586253 DOI: 10.1016/j.foodchem.2022.135296] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 10/23/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
A novel sandwich assay for the detection of L. monocytogenes was designed based on antibiotic magnetic separation and enzymatic colorimetry. PEG-mediated cefepime functionalized magnetic nanoparticles (Cefe-PEG-MNPs) was reported for the first time to anchor L. monocytogenes cells with excellent bacterial capture capacity. The capture efficiency of L. monocytogenes in lettuce sample with high concentration (3.1 × 106 CFU/mL) was more than 73.8%. Anti-L. monocytogenes monoclonal antibody was adopted as the second anchoring agent to ensure the specificity for L. monocytogenes, which was co-modified with HRP on the surface of gold nanoparticles (AuNPs-HRP/mAb) to form AuNPs-HRP/mAb@L. monocytogenes@Cefe-PEG-MNPs sandwich complexes, and TMB was added to generate a colorimetric signal. The limit of detection in contaminated lettuce, watermelon juice, and fresh meat samples were both 3.1 × 102 CFU/mL, and the whole assay takes about 110 min. Based on the above facts, the proposed method has great potential for rapid separation and detection of pathogenic bacteria in food.
Collapse
Affiliation(s)
- Fangbin Xiao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Zhengzheng Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Weiqiang Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Wenfei Qi
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Xuekun Bai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China.
| |
Collapse
|
3
|
Qiu S, Liu B, Leng Y, Fox E, Zhou X, Yan B, Sang X, Long K, Fu Y, He X, Yuan J, Farrell G, Wu Q. A label-free fiber ring laser biosensor for ultrahigh sensitivity detection of Salmonella Typhimurium. Biosens Bioelectron 2023; 234:115337. [PMID: 37126876 DOI: 10.1016/j.bios.2023.115337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 03/30/2023] [Accepted: 04/17/2023] [Indexed: 05/03/2023]
Abstract
The rapid detection of low concentrations of Salmonella Typhimurium (S. Typhimurium) is an essential preventive measure for food safety and prevention of foodborne illness. The study presented in this paper addresses this critical issue by proposing a single mode-tapered seven core-single mode (STSS) fiber ring laser (FRL) biosensor for S. Typhimurium detection. The experimental results show that the specific detection time of S. Typhimurium is less than 20 min and the wavelength shift can achieve -0.906 nm for an S. Typhimurium solution (10 cells/mL). Furthermore, at a lower concentration of 1 cell/mL applied to the biosensor, a result of -0.183 nm is observed in 9% of samples (1/11), which indicates that the proposed FRL biosensor has the ability to detect 1 cell/mL of S. Typhimurium. In addition, the detection results in chicken and pickled pork samples present an average deviation of -27% and -23%, respectively, from the measured results in phosphate buffered saline. Taken together, these results show the proposed FRL biosensor may have potential applications in the fields of food safety monitoring, medical diagnostics, etc.
Collapse
Affiliation(s)
- Shi Qiu
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Bin Liu
- Key Laboratory of Optoelectronic Information Science and Technology of Jiangxi Province, Nanchang Hangkong University, Nanchang, 330063, China
| | - Yuankui Leng
- State Key Lab Food Sci & Technol, Nanchang University, Nanchang, China
| | - Edward Fox
- Faculty of Health and Life Sciences, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom
| | - Xian Zhou
- Research Center for Convergence Networks and Ubiquitous Services, University of Science & Technology Beijing, Beijing, 100083, China
| | - Binbin Yan
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Xinzhu Sang
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Keping Long
- Research Center for Convergence Networks and Ubiquitous Services, University of Science & Technology Beijing, Beijing, 100083, China
| | - Yanjun Fu
- Key Laboratory of Optoelectronic Information Science and Technology of Jiangxi Province, Nanchang Hangkong University, Nanchang, 330063, China
| | - Xingdao He
- Key Laboratory of Optoelectronic Information Science and Technology of Jiangxi Province, Nanchang Hangkong University, Nanchang, 330063, China
| | - Jinhui Yuan
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China; Research Center for Convergence Networks and Ubiquitous Services, University of Science & Technology Beijing, Beijing, 100083, China.
| | - Gerald Farrell
- Photonics Research Centre, School of Electrical and Electronic Engineering, City Campus, Technological University Dublin, Dublin 7, Ireland
| | - Qiang Wu
- Key Laboratory of Optoelectronic Information Science and Technology of Jiangxi Province, Nanchang Hangkong University, Nanchang, 330063, China; Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom.
| |
Collapse
|
4
|
Cai G, Yang Z, Chen YC, Huang Y, Liang L, Feng S, Zhao J. Magnetic Bead Manipulation in Microfluidic Chips for Biological Application. CYBORG AND BIONIC SYSTEMS 2023; 4:0023. [PMID: 37287460 PMCID: PMC10243203 DOI: 10.34133/cbsystems.0023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 03/20/2023] [Indexed: 10/21/2023] Open
Abstract
Magnetic beads manipulation in microfluidic chips is a promising research field for biological application, especially in the detection of biological targets. In this review, we intend to present a thorough and in-depth overview of recent magnetic beads manipulation in microfluidic chips and its biological application. First, we introduce the mechanism of magnetic manipulation in microfluidic chip, including force analysis, particle properties, and surface modification. Then, we compare some existing methods of magnetic manipulation in microfluidic chip and list their biological application. Besides, the suggestions and outlook for future developments in the magnetic manipulation system are also discussed and summarized.
Collapse
Affiliation(s)
- Gaozhe Cai
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology,
Chinese Academy of Sciences, Shanghai 200050, China
| | - Zixin Yang
- School of Communication and Information Engineering,
Shanghai University, Shanghai 200444, China
| | - Yu-Cheng Chen
- School of Electrical and Electronics Engineering,
Nanyang Technological University, 50 Nanyang Ave., Singapore 639798, Singapore
| | - Yaru Huang
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology,
Chinese Academy of Sciences, Shanghai 200050, China
- School of Life Sciences,
Shanghai Normal University, Shanghai, 200235, China
| | - Lijuan Liang
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology,
Chinese Academy of Sciences, Shanghai 200050, China
| | - Shilun Feng
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology,
Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering,
University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianlong Zhao
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology,
Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering,
University of Chinese Academy of Sciences, Beijing 100049, China
- Xiangfu Laboratory, Jiaxing, Zhejiang 314102, China
| |
Collapse
|
5
|
Maciel C, Silva NFD, Teixeira P, Magalhães JMCS. Development of a Novel Phagomagnetic-Assisted Isothermal DNA Amplification System for Endpoint Electrochemical Detection of Listeria monocytogenes. BIOSENSORS 2023; 13:bios13040464. [PMID: 37185539 PMCID: PMC10136355 DOI: 10.3390/bios13040464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 05/17/2023]
Abstract
The hitherto implemented Listeria monocytogenes detection techniques are cumbersome or require expensive non-portable instrumentation, hindering their transposition into on-time surveillance systems. The current work proposes a novel integrated system resorting to loop-mediated isothermal amplification (LAMP), assisted by a bacteriophage P100-magnetic platform, coupled to an endpoint electrochemical technique, towards L. monocytogenes expeditious detection. Molybdophosphate-based optimization of the bacterial phagomagnetic separation protocol allowed the determination of the optimal parameters for its execution (pH 7, 25 °C, 32 µg of magnetic particles; 60.6% of specific capture efficiency). The novel LAMP method targeting prfA was highly specific, accomplishing 100% inclusivity (for 61 L. monocytogenes strains) and 100% exclusivity (towards 42 non-target Gram-positive and Gram-negative bacteria). As a proof-of-concept, the developed scheme was successfully validated in pasteurized milk spiked with L. monocytogenes. The phagomagnetic-based approach succeeded in the selective bacterial capture and ensuing lysis, triggering Listeria DNA leakage, which was efficiently LAMP amplified. Methylene blue-based electrochemical detection of LAMP amplicons was accomplished in 20 min with remarkable analytical sensitivity (1 CFU mL-1). Hence, the combined system presented an outstanding performance and robustness, providing a 2.5 h-swift, portable, cost-efficient detection scheme for decentralized on-field application.
Collapse
Affiliation(s)
- Cláudia Maciel
- Laboratório Associado, Escola Superior de Biotecnologia, CBQF-Centro de Biotecnologia e Química Fina, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Nádia F D Silva
- REQUIMTE/LAQV, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal
| | - Paula Teixeira
- Laboratório Associado, Escola Superior de Biotecnologia, CBQF-Centro de Biotecnologia e Química Fina, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Júlia M C S Magalhães
- REQUIMTE/LAQV, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal
| |
Collapse
|
6
|
Kang Y, Shi S, Sun H, Dan J, Liang Y, Zhang Q, Su Z, Wang J, Zhang W. Magnetic Nanoseparation Technology for Efficient Control of Microorganisms and Toxins in Foods: A Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:16050-16068. [PMID: 36533981 DOI: 10.1021/acs.jafc.2c07132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Outbreaks of foodborne diseases mediated by food microorganisms and toxins remain one of the leading causes of disease and death worldwide. It not only poses a serious threat to human health and safety but also imposes a huge burden on health care and socioeconomics. Traditional methods for the removal and detection of pathogenic bacteria and toxins in various samples such as food and drinking water have certain limitations, requiring a rapid and sensitive strategy for the enrichment and separation of target analytes. Magnetic nanoparticles (MNPs) exhibit excellent performance in this field due to their fascinating properties. The strategy of combining biorecognition elements with MNPs can be used for fast and efficient enrichment and isolation of pathogens. In this review, we describe new trends and practical applications of magnetic nanoseparation technology in the detection of foodborne microorganisms and toxins. We mainly summarize the biochemical modification and functionalization methods of commonly used magnetic nanomaterial carriers and discuss the application of magnetic separation combined with other instrumental analysis techniques. Combined with various detection techniques, it will increase the efficiency of detection and identification of microorganisms and toxins in rapid assays.
Collapse
Affiliation(s)
- Yi Kang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Shuo Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Hao Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Jie Dan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Yanmin Liang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Qiuping Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Zehui Su
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Wentao Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| |
Collapse
|
7
|
Qing Y, Yang Y, Ouyang P, Fang C, Fang H, Liao Y, Li H, Wang Z, Du J. Gold Nanoparticle-Based Enzyme-Assisted Cyclic Amplification for the Highly-Sensitive Detection of miRNA-21. BIOSENSORS 2022; 12:bios12090724. [PMID: 36140109 PMCID: PMC9496089 DOI: 10.3390/bios12090724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/28/2022] [Accepted: 09/01/2022] [Indexed: 12/27/2022]
Abstract
Because microRNAs (miRNAs) are biological indicators for the diagnosis, treatment, and monitoring of tumors, cancers, and other diseases, it is significant to develop a rapid, sensitive, and reliable miRNA detection platform. In this study, based on miRNA-21 detection, DNA-a with a 3′ end overhang and Texas Red fluorophore-labeled 5′ end was designed, which reacts with miRNA-21 and hybridizes with exonuclease III (Exo III), where the part connected to miRNA-21 is hydrolyzed, leaving a-DNA. At the same time, miRNA-21 is released to participate in the following reaction, to achieve cyclic amplification. a-DNA reacts with DNA-b conjugated to gold nanoparticles to achieve fluorescence quenching, with the quenching value denoted as F; additionally, after adding DNA-d and linked streptavidin immunomagnetic beads (SIBs), fluorescence recovery was achieved using DNA-c, with the recovered fluorescence recorded as F0. By comparing the difference in the fluorescence (F0 − F) between the two experiments, the amount of DNA-a hydrolyzed to produce a-DNA was established to determine the target miRNA-21 content. Under optimized conditions, by comparing the changes in the fluorescence signal, the developed strategy shows good sensitivity and repeatability, with a detection limit of 18 pM, good discriminative ability and selectivity, and promise for the early diagnosis of breast and intestinal cancers.
Collapse
|
8
|
Xiao F, Li W, Xu H. Advances in magnetic nanoparticles for the separation of foodborne pathogens: Recognition, separation strategy, and application. Compr Rev Food Sci Food Saf 2022; 21:4478-4504. [PMID: 36037285 DOI: 10.1111/1541-4337.13023] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/20/2022] [Accepted: 07/25/2022] [Indexed: 01/28/2023]
Abstract
Foodborne pathogens contamination is one of the main sources of food safety problems. Although the existing detection methods have been developed for a long time, the complexity of food samples is still the main factor affecting the detection time and sensitivity, and the rapid separation and enrichment of pathogens is still an objective to be studied. Magnetic separation strategy based on magnetic nanoparticles (MNPs) is considered to be an effective tool for rapid separation and enrichment of foodborne pathogens in food. Therefore, this study comprehensively reviews the development of MNPs in the separation of foodborne pathogens over the past decade. First, various biorecognition reagents for identification of foodborne pathogens and their modifications on the surface of MNPs are introduced. Then, the factors affecting the separation of foodborne pathogens, including the size of MNPs, modification methods, separation strategies and separation forms are discussed. Finally, the application of MNPs in integrated detection methods is reviewed. Moreover, current challenges and prospects of MNPs for the analysis of foodborne pathogens are discussed. Further research should focus on the design of multifunctional MNPs, the processing of large-scale samples, the simultaneous analysis of multiple targets, and the development of all-in-one small analytical device with separation and detection.
Collapse
Affiliation(s)
- Fangbin Xiao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, P. R. China
| | - Weiqiang Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, P. R. China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, P. R. China
| |
Collapse
|
9
|
Wen Y, Tan Y, Zhao L, Lv X, Lin L, Liang D, Wang L. Rapid on-site detection of viable Escherichia coli O157: H7 in lettuce using immunomagnetic separation combined with PMAxx-LAMP and nucleic acid lateral flow strip. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Colorimetric sensor based on peroxidase-like activity of chitosan coated on magnetic nanoparticles for rapid detection of the total bacterial count in raw milk. Eur Food Res Technol 2022. [DOI: 10.1007/s00217-022-03970-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
11
|
Gao J, Zhang L, Xue L, Cai W, Qin Z, Yang J, Liang Y, Wang L, Chen M, Ye Q, Li Y, Wang J, Wu S, Wu Q, Zhang J. Development of a High-Efficiency Immunomagnetic Enrichment Method for Detection of Human Norovirus via PAMAM Dendrimer/SA-Biotin Mediated Cascade-Amplification. Front Microbiol 2021; 12:673872. [PMID: 34354679 PMCID: PMC8329424 DOI: 10.3389/fmicb.2021.673872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 06/29/2021] [Indexed: 11/21/2022] Open
Abstract
Human norovirus is a common cause of acute gastroenteritis worldwide, and oysters have been found to be the main carriers for its spread. The lack of efficient pre-treatment methods has been a major bottleneck limiting the detection of viruses in oysters. In this study, we established a novel immunomagnetic enrichment method using polyamidoamine (PAMAM) dendrimer/SA-biotin-mediated cascade amplification for reverse transcriptase quantitative real-time polymerase chain reaction (RT-qPCR) detection. We compared the capture efficiency of traditional immunomagnetic enrichment, biotin-amplified immunomagnetic enrichment, and PAMAM dendrimer/SA-biotin-mediated cascade-amplification immunomagnetic enrichment. The optimal capture efficiency of the novel method was 44.26 ± 1.45%, which increased by 183.17% (P < 0.01) and 18.09% (P < 0.05) compared with the first two methods, respectively. Three methods were all applied in detecting norovirus in 44 retail oysters, the detection rate of the PAMAM dendrimer/SA-biotin-mediated method was 25.0%, which was higher than those of traditional IME (15.90%) and SA-biotin-amplified IME (18.80%) by 9.1 and 6.2%, respectively. In conclusion, the novel method can be applied for the rapid detection of norovirus in oysters, which can help reduce the cost and time of detection and improve detection rates.
Collapse
Affiliation(s)
- Junshan Gao
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Le Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Weicheng Cai
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Zhiwei Qin
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jiale Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Yanhui Liang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Linping Wang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Qinghua Ye
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Ying Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Juan Wang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,College of Food Science, South China Agricultural University, Guangzhou, China
| | - Shi Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| |
Collapse
|
12
|
Gao P, Wang L, He Y, Wang Y, Yang X, Fu S, Qin X, Chen Q, Man C, Jiang Y. An Enhanced Lateral Flow Assay Based on Aptamer-Magnetic Separation and Multifold AuNPs for Ultrasensitive Detection of Salmonella Typhimurium in Milk. Foods 2021; 10:1605. [PMID: 34359475 PMCID: PMC8306288 DOI: 10.3390/foods10071605] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 11/30/2022] Open
Abstract
In this paper, a novel and ultrasensitive lateral flow assay (LFA) based on aptamer-magnetic separation, and multifold Au nanoparticles (AuNPs) was developed for visual detecting Salmonella enterica ser. Typhimurium (S. Typhimurium). The method realized magnetic enrichment and signal transduction via magnetic separation and achieved signal amplification through hybridizing AuNPs-capture probes and AuNPs-amplification probes to form multifold AuNPs. Two different thiolated single-strand DNA (ssDNA) on the AuNPs-capture probe played different roles. One was combined with the AuNPs-amplification probe on the conjugate pad to achieve enhanced signals. The other was connected to transduction ssDNA1 released by aptamer-magnetic capture of S. Typhimurium, and captured by the T-line, forming a positive signal. This method had an excellent linear relationship ranging from 8.6 × 102 CFU/mL to 8.6 × 107 CFU/mL with the limit of detection (LOD) as low as 8.6 × 100 CFU/mL in pure culture. In actual samples, the visual LOD was 4.1 × 102 CFU/mL, which did not carry out nucleic acid amplification and pre-enrichment, increasing three orders of magnitudes than unenhanced assays with single-dose AuNPs and no magnetic separation. Furthermore, the system showed high specificity, having no reaction with other nontarget strains. This visual signal amplificated system would be a potential platform for ultrasensitive monitoring S. Typhimurium in milk samples.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | - Yujun Jiang
- Key Laboratory of Dairy Science, Ministry of Education, Department of Food Science, Northeast Agricultural University, Harbin 150030, China; (P.G.); (L.W.); (Y.H.); (Y.W.); (X.Y.); (S.F.); (X.Q.); (Q.C.); (C.M.)
| |
Collapse
|
13
|
Lv X, Wang L, Zhang J, He X, Shi L, Zhao L. Quantitative detection of trace VBNC Cronobacter sakazakii by immunomagnetic separation in combination with PMAxx-ddPCR in dairy products. Food Microbiol 2021; 99:103831. [PMID: 34119116 DOI: 10.1016/j.fm.2021.103831] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 01/20/2023]
Abstract
One immunomagnetic separation (IMS) assay based on immunomagnetic beads (IMBs) has been evaluated as a potential pretreatment tool for the separation and enrichment of target bacteria. In this study, we successfully immobilized antibodies onto magnetic bead surfaces to form IMBs through biotin and a streptavidin (SA) system to capture viable but nonculturable (VBNC) Cronobacter sakazakii (C. sakazakii) from dairy products. Various parameters that affected the capture efficiency (CE) of IMS, including the number of antibodies, IMBs dose, incubation time, magnetic separation time, and immunoreaction temperature, were systematically investigated. We further determined the optimal enrichment conditions for different dairy substrates to ensure maximum enrichment of target pathogens in the system. An IMS technique combining improved propidium monoazide (PMAxx) and droplet digital PCR (ddPCR) was established to detect the pathogenic VBNC C. sakazakii. The IMS-PMAxx-ddPCR method after IMBs enrichment showed higher accuracy when the VBNC C. sakazakii was under 1 Log10 copies/g. The detection limit for this method in a background of powdered infant formula (PIF) was 5.6 copies/g. In summary, the developed IMS-PMAxx-ddPCR method has great potential for the analysis and detection of VBNC bacteria in food.
Collapse
Affiliation(s)
- Xinrui Lv
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Li Wang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Jingfeng Zhang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Xiaoxin He
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Lei Shi
- Institute of Food Safety and Nutrition, Jinan University, Guangzhou, 510632, China.
| | - Lichao Zhao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China.
| |
Collapse
|
14
|
Development of a fluorescence aptasensor for rapid and sensitive detection of Listeria monocytogenes in food. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107808] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
15
|
Shi X, Yu L, Lin C, Li K, Chen J, Qin H. Biotin exposure-based immunomagnetic separation coupled with sodium dodecyl sulfate, propidium monoazide, and multiplex real-time PCR for rapid detection of viable Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes in milk. J Dairy Sci 2021; 104:6588-6597. [PMID: 33715855 DOI: 10.3168/jds.2020-19887] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/28/2021] [Indexed: 11/19/2022]
Abstract
In this study, we established a rapid and sensitive method for the detection of viable Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes in milk using biotin-exposure-based immunomagnetic separation (IMS) combined with sodium dodecyl sulfate (SDS), propidium monoazide (PMA), and multiplex real-time PCR (mRT-PCR). We used IMS to lessen the assay time for isolation of target bacteria. We then optimized the coupling conditions and immunomagnetic capture process. The immunoreaction and incubation times for 5 μg of mAb coupled with 500 μg of streptavidin-functionalized magnetic beads using a streptavidin-biotin system were 90 and 30 min, respectively. Treatment with SDS-PMA before mRT-PCR amplification eliminated false-positive outcomes from dead bacteria and identified viable target bacteria with good sensitivity and specificity. The limit of detection of IMS combined with the SDS-PMA-mRT-PCR assay for the detection of viable Salmonella Typhimurium, Staph. aureus, and L. monocytogenes in spiked milk matrix samples was 10 cfu/mL and remained significant even in the appearance of 106 cfu/mL of nontarget bacteria. The entire detection process was able to identify viable bacteria within 9 h. The combination of biotin-exposure-mediated IMS and SDS-PMA-mRT-PCR has potential value for the rapid and sensitive detection of foodborne pathogens.
Collapse
Affiliation(s)
- Xiuquan Shi
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China
| | - Liang Yu
- Research and Development Office, Hunan First Normal University, Changsha 410205, P. R. China
| | - Cui Lin
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China
| | - Ke Li
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, P. R. China
| | - Jihua Chen
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China
| | - Hong Qin
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China.
| |
Collapse
|
16
|
Wang Z, Cai R, Gao Z, Yuan Y, Yue T. Immunomagnetic separation: An effective pretreatment technology for isolation and enrichment in food microorganisms detection. Compr Rev Food Sci Food Saf 2020; 19:3802-3824. [PMID: 33337037 DOI: 10.1111/1541-4337.12656] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/17/2020] [Accepted: 09/24/2020] [Indexed: 12/24/2022]
Abstract
The high efficiency and accurate detection of foodborne pathogens and spoilage microorganisms in food are a task of great social, economic, and public health importance. However, the contamination levels of target bacteria in food samples are very low. Owing to the background interference of food ingredients and negative impact of nontarget flora, the establishment of efficient pretreatment techniques is very crucial for the detection of food microorganisms. With the significant advantages of high specificity and great separation efficiency, immunomagnetic separation (IMS) assay based on immunomagnetic particles (IMPs) has been considered as a powerful system for the separation and enrichment of target bacteria. This paper mainly focuses on the development of IMS as well as their application in food microorganisms detection. First, the basic principle of IMS in the concentration of food bacteria is presented. Second, the effect of different factors, including the sizes of magnetic particles (MPs), immobilization of antibody and operation parameters (the molar ratio of antibody to MPs, the amount of IMPs, incubation time, and bacteria concentration) on the immunocapture efficiency of IMPs are discussed. The performance of IMPs in different food samples is also evaluated. Finally, the combination of IMS and various kinds of detection methods (immunology-based methods, nucleic acid-based methods, fluorescence methods, and biosensors) to detect pathogenic and spoilage organisms is summarized. The challenges and future trends of IMS are also proposed. As an effective pretreatment technique, IMS can improve the detection sensitivity and shorten their testing time, thus exhibiting broad prospect in the field of food bacteria detection.
Collapse
Affiliation(s)
- Zhouli Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture, Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Rui Cai
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture, Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Zhenpeng Gao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture, Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture, Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Ministry of Agriculture, Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| |
Collapse
|
17
|
Liang T, Wu X, Chen B, Liu J, Aguilar ZP, Xu H. The PCR-HCR dual signal amplification strategy for ultrasensitive detection of Escherichia coli O157:H7 in milk. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
18
|
Zhao L, Lv X, Cao X, Zhang J, Gu X, Zeng H, Wang L. Improved quantitative detection of VBNC Vibrio parahaemolyticus using immunomagnetic separation and PMAxx-qPCR. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106962] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
19
|
Li Y, Wang Y, Li P, Zhang Y, Ke Y, Yu W, Wen K, Ding S, Wang Z, Yu X. High efficient chemiluminescent immunoassays for the detection of diclazuril in chicken muscle based on biotin–streptavidin system. FOOD AGR IMMUNOL 2020. [DOI: 10.1080/09540105.2020.1713054] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Yuan Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| | - Yahui Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
- Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - PeiPei Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| | - Yingjie Zhang
- Beijing WDWK Biotechnology Co., Ltd, Beijing, People’s Republic of China
| | - Yuebin Ke
- Department of Genetic Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, People’s Republic of China
| | - Wenbo Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| | - Kai Wen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| | - Shuangyang Ding
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| | - Zhanhui Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| | - Xuezhi Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, Beijing, People’s Republic of China
| |
Collapse
|
20
|
Li X, Zhao C, Liu Y, Li Y, Lian F, Wang D, Zhang Y, Wang J, Song X, Li J, Yang Y, Xu K. Fluorescence signal amplification assay for the detection of B. melitensis 16M, based on peptide-mediated magnetic separation technology and a AuNP-mediated bio-barcode assembled by quantum dot technology. Analyst 2019; 144:2704-2715. [PMID: 30864589 DOI: 10.1039/c9an00028c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Members of the Brucella spp. are facultative intracellular bacteria that can cause global brucellosis, a zoonotic disease. Herein, a novel fluorescence signal amplification (FSA) method for the rapid detection of B. melitensis 16M was developed based on peptide-mediated magnetic separation (PMS) technology and Au nanoparticle (AuNP)-mediated bio-barcode assay technology assembled by quantum dots (QDs). The PMS technology was used to specifically capture and isolate B. melitensis 16M from food. The immunomagnetic bead-B. melitensis 16M bioconjugates (IMBs-B. melitensis 16M) were then identified by IgY on the surface of AuNPs and the oligonucleotide chains on the surface of the gold nanoparticles were hybridized with bio-barcodes assembled by quantum dots (QD-probe2). The IMB/B. melitensis 16M/IgY-AuNP-probe1/QD-probe2 bioconjugates were concentrated by magnetic separation. Therefore, as the concentration of B. melitensis 16M in the sample increased, the unbound QD-probe2 in the supernatant reduced, and the B. melitensis 16M in the sample could be indirectly measured by detecting the fluorescence in the supernatant. This FSA method can detect B. melitensis 16M concentration in the range of 10 to 106 cfu ml-1 without pre-enrichment, and the limit of detection (LOD) is as low as 10 cfu ml-1 with high specificity. Furthermore, the proposed method for the detection of B. melitensis 16M has a LOD of 1.07 × 102 cfu ml-1 and a linear range from 102 to 107 cfu ml-1 in milk, and a LOD of 1.72 × 102 cfu ml-1, and a linear range from 102 to 106 cfu ml-1 in lamb leach. In addition, this method takes less than 3 h to perform. Thus, the assay that was developed in this study shows promise for rapid, sensitive, and specific detection of B. melitensis 16M.
Collapse
Affiliation(s)
- Xinxin Li
- School of Public Health of Jilin University, Changchun, Jilin 130021, P. R. China.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Huang Z, Hu S, Xiong Y, Wei H, Xu H, Duan H, Lai W. Application and development of superparamagnetic nanoparticles in sample pretreatment and immunochromatographic assay. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.03.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
Fang B, Hu S, Wang C, Yuan M, Huang Z, Xing K, Liu D, Peng J, Lai W. Lateral flow immunoassays combining enrichment and colorimetry-fluorescence quantitative detection of sulfamethazine in milk based on trifunctional magnetic nanobeads. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.11.039] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Zhou Y, Ramasamy RP. Isolation and separation of Listeria monocytogenes using bacteriophage P100-modified magnetic particles. Colloids Surf B Biointerfaces 2019; 175:421-427. [PMID: 30562716 DOI: 10.1016/j.colsurfb.2018.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 11/30/2018] [Accepted: 12/05/2018] [Indexed: 12/14/2022]
Abstract
A bacteriophage-assisted magnetic separation method was developed for the isolation of Listeria monocytogenes from complex food matrices. The aim of this study is to understand the effect of phage immobilization methods and the magnetic particle sizes on the phage coupling and infectivity retention of the magnetic particles. In this study, bacteriophage P100-modified magnetic particles (PMMPs) were developed for the separation of L. monocytogenes from food matrices. Three sizes of magnetic particles (MP) (150 nm, 500 nm, and 1 μm) were used for phage immobilization via chemical and physical methods. The coupling ratio of phage was investigated, and the performance of each PMMP complex was evaluated by their L. monocytogenes capture efficiency. When compared to the chemical immobilization method, the physically immobilized PMMP complex achieved a higher capture efficiency initially, with excellent selectivity towards target bacteria. The PMMPs were further tested for selective isolation of L. monocytogenes using real food samples such as ground beef and whole milk.
Collapse
Affiliation(s)
- Yan Zhou
- Nano Electrochemistry Laboratory, School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens, Georgia 30602, USA; Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - Ramaraja P Ramasamy
- Nano Electrochemistry Laboratory, School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens, Georgia 30602, USA; Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA.
| |
Collapse
|
24
|
A fluorometric clenbuterol immunoassay based on the use of organic/inorganic hybrid nanoflowers modified with gold nanoclusters and artificial antigen. Mikrochim Acta 2018; 185:366. [DOI: 10.1007/s00604-018-2889-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 06/26/2018] [Indexed: 01/23/2023]
|
25
|
Li F, Li F, Luo D, Lai W, Xiong Y, Xu H. Biotin-exposure-based immunomagnetic separation coupled with nucleic acid lateral flow biosensor for visibly detecting viable Listeria monocytogenes. Anal Chim Acta 2018. [PMID: 29534795 DOI: 10.1016/j.aca.2018.02.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Infectious diseases caused by Listeria monocytogenes pose a great threat to public health worldwide. Therefore, a rapid and efficient method for L. monocytogenes detection is needed. In this study, a biotin-exposure-based immunomagnetic separation (IMS) method was developed. That is, biotinylated antibody was first targeted to L. monocytogenes. Then, streptavidin-functionalized magnetic nanoparticles were added and anchored onto L. monocytogenes cells indirectly through the strong noncovalent interaction between streptavidin and biotin. Biotin-exposure-based IMS exhibited an excellent capability to enrich L. monocytogenes. Specifically, more than 90% of L. monocytogenes was captured when the bacterial concentration was lower than 104 colony-forming units (CFU)/mL. Importantly, the antibody dosage was reduced by 10 times of that in our previous study, which used antibody direct-conjugated magnetic nanoparticles. Propidium monoazide (PMA) treatment prior to PCR amplification could eliminate the false-positive results from dead bacteria and detected viable L. monocytogenes sensitively and specifically. For viable L.monocytogenes detection, enriched L. monocytogenes was treated with PMA prior to asymmetric PCR amplification. The detection limits of the combined IMS with nucleic acid lateral flow (NALF) biosensor for viable L. monocytogenes detection were 3.5 × 103 CFU/mL in phosphate buffer solution and 3.5 × 104 CFU/g in lettuce samples. The whole assay process of recognizing viable L. monocytogenes was completed within 6 h. The proposed biotin-exposure-mediated IMS combined with a disposable NALF biosensor platform posed no health risk to the end user, and possessed potential applications in the rapid screening and identification of foodborne pathogens.
Collapse
Affiliation(s)
- Fulai Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Fan Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Dan Luo
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Weihua Lai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China.
| |
Collapse
|
26
|
Luo D, Huang X, Mao Y, Chen C, Li F, Xu H, Xiong Y. Two-step large-volume magnetic separation combined with PCR assay for sensitive detection of Listeria monocytogenes in pasteurized milk. J Dairy Sci 2017; 100:7883-7890. [DOI: 10.3168/jds.2017-13140] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 06/17/2017] [Indexed: 11/19/2022]
|
27
|
Meng X, Yang G, Li F, Liang T, Lai W, Xu H. Sensitive Detection of Staphylococcus aureus with Vancomycin-Conjugated Magnetic Beads as Enrichment Carriers Combined with Flow Cytometry. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21464-21472. [PMID: 28590745 DOI: 10.1021/acsami.7b05479] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel sandwich strategy was designed to detect Staphylococcus aureus. The strategy is based on an antibacterial agent that captures bacterial cells and a fluorescein-labeled antibody that acts as the signal-output probe. Vancomycin (Van), which exerts a strong antibacterial effect on Gram-positive bacteria, was utilized as a molecular recognition agent to detect pathogenic bacteria. To effectively concentrate S. aureus, we used bovine serum albumin (BSA) as the amplification carrier to modify magnetic beads (MBs), which were then functionalized with Van. To improve the specificity of the method for S. aureus detection, we adopted fluorescein isothiocyanate (FITC)-tagged pig immunoglobulin G (FITC-pig IgG) as the signal probe and the second recognition agent that bound between the Fc fragment of pig IgG and protein A in the surface of S. aureus. To quantify S. aureus, we measured the fluorescence signal by flow cytometry (FCM). The use of multivalent magnetic nanoprobes (Van-BSA-MBs) showed a high concentration efficiency (>98%) at bacterial concentrations of only 33 colony-forming units (CFU)/mL. Furthermore, the sandwich mode (FITC-pig IgG/SA/Van-BSA-MBs) also showed ideal specificity because Van and IgG bound with S. aureus at two distinct sites. The detection limit for S. aureus was 3.3 × 101 CFU/mL and the total detection process could be completed within 120 min. Other Gram-positive bacteria and Gram-negative bacteria, including Listeria monocytogenes, Bacillus cereus, Cronobacter sakazakii, Escherichia coli O157:H7, and Salmonella Enteritidis, negligibly interfered with S. aureus detection. The proposed detection strategy for S. aureus possesses attractive characteristics, such as high sensitivity, simple operation, short testing time, and low cost.
Collapse
Affiliation(s)
- Xiangyu Meng
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| | - Guotai Yang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| | - Fulai Li
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| | - Taobo Liang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| | - Weihua Lai
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| |
Collapse
|
28
|
Sextuplex PCR combined with immunomagnetic separation and PMA treatment for rapid detection and specific identification of viable Salmonella spp., Salmonella enterica serovars Paratyphi B, Salmonella Typhimurium, and Salmonella Enteritidis in raw meat. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.09.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
29
|
Duan ML, Huang YM, Wu SS, Li GQ, Wang SY, Chen MH, Wang C, Liu DF, Liu CW, Lai WH. Rapid and sensitive detection of Salmonella enteritidis by a pre-concentrated immunochromatographic assay in a large-volume sample system. RSC Adv 2017. [DOI: 10.1039/c7ra11006e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A pre-concentrated immunochromatographic assay for Salmonella enteritidis (S. enteritidis) detection was developed based on the unique optical and magnetic properties of magnetic nanoparticles (MNPs).
Collapse
Affiliation(s)
- Miao-Lin Duan
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| | - Yan-Mei Huang
- Jiangxi YeLi Medical Device Co., Ltd
- Nanchang 330008
- China
| | - Song-Song Wu
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| | - Guo-Qiang Li
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| | - Shu-Ying Wang
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| | - Ming-Hui Chen
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| | - Chun Wang
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| | - Dao-Feng Liu
- Institute for Nutrition and Food Safety
- Jiangxi Province Centre for Disease Control and Prevention
- Nanchang 330029
- China
| | - Cheng-Wei Liu
- Institute for Nutrition and Food Safety
- Jiangxi Province Centre for Disease Control and Prevention
- Nanchang 330029
- China
| | - Wei-Hua Lai
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang 330047
- China
| |
Collapse
|
30
|
Huang Z, Cui X, Xie QY, Liu DF, Lai WH. Short communication: A novel method using immunomagnetic separation with a fluorescent nanobeads lateral flow assay for the rapid detection of low-concentration Escherichia coli O157:H7 in raw milk. J Dairy Sci 2016; 99:9581-9585. [DOI: 10.3168/jds.2016-11780] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 08/12/2016] [Indexed: 11/19/2022]
|
31
|
Highly efficient and specific separation of Staphylococcus aureus from lettuce and milk using Dynabeads protein G conjugates. Food Sci Biotechnol 2016; 25:1501-1505. [PMID: 30263437 DOI: 10.1007/s10068-016-0233-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/28/2016] [Accepted: 06/28/2016] [Indexed: 01/06/2023] Open
Abstract
An immunomagnetic separation method using antibody-coated Dynabeads® Protein G was developed for specific and efficient separation of Staphylococcus aureus in lettuce and whole milk. The amount of immunomagnetic beads (IMBs) and conjugation conditions were optimized. A high capture efficiency was obtained with 0.4 mg of IMBs, an immunoreaction time of 20 min, and a separation time of 1 min without wash. Under optimal conditions, the capture efficiency (CE) for 100-105 CFU/mL of S. aureus was higher than 91.46%. The IMBs showed high specificity even with a high constant number (107 CFU/mL) of Bacillus cereus, Micrococcus luteus, and Lactobacillus plantarum. The CE of IMBs against S. aureus at concentrations from 102 to 105 CFU/mL ranged from 78.70 to 94.77% for lettuce and 60.0 to 73.27% for milk samples. This IMS can be an appropriate selection for combining with bacterial detection method or efficient isolation procedure for S. aureus from foods.
Collapse
|
32
|
Detection of Cronobacter sakazakii in powdered infant formula using an immunoliposome-based immunomagnetic concentration and separation assay. Sci Rep 2016; 6:34721. [PMID: 27721500 PMCID: PMC5056387 DOI: 10.1038/srep34721] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 09/19/2016] [Indexed: 12/04/2022] Open
Abstract
This study aimed to optimize the applicability of an immunoliposome-based immunomagnetic concentration and separation assay to facilitate rapid detection of Cronobacter sakazakii in powdered infant formula (PIF). To determine the detection limit, specificity, and pre-enrichment incubation time (0, 4, 6, and 8 h), assay tests were performed with different cell numbers of C. sakazakii (2 × 100 and 2 × 101 CFU/ml) inoculated in 10 g of PIF. The assay was able to detect as few as 2 cells of C. sakazakii/10 g of PIF sample after 6 h of pre-enrichment incubation with an assay time of 2 h 30 min. The assay was assessed for cross-reactivity with other bacterial strains and exhibited strong specificity to C. sakazakii. Moreover, the assay method was applied to the detection of C. sakazakii in PIF without pre-enrichment steps, and the results were compared with INC-ELISA and RT-PCR. The developed method was able to detect C. sakazakii in spiked PIF without pre-enrichment, whereas INC-ELISA failed to detect C. sakazakii. In addition, when compared with the results obtained with RT-PCR, our developed assay required lesser detection time. The developed assay was also not susceptible to any effect of the food matrix or background contaminant microflora.
Collapse
|
33
|
Wei S, Forghani F, Park YS, Park BJ, Seo KH, Oh DH. Dynabeads protein G antibody conjugates combined with modified brain heart infusion broth for the enrichment and separation of Bacillus cereus in artificially contaminated vegetables. Food Sci Biotechnol 2016; 25:941-947. [PMID: 30263358 DOI: 10.1007/s10068-016-0154-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/15/2016] [Accepted: 03/27/2016] [Indexed: 11/27/2022] Open
Abstract
A modified brain heart infusion (MBHI) broth and a protocol of immunomagnetic separation (IMS) using antibody-coated Dynabeads® protein G were developed for the enrichment and separation of Bacillus cereus in artificially contaminated vegetable samples. The MBHI consisted of BHI and 0.34 g/L magnesium sulfate, 12.08 g/L sodium pyruvate, 1.82 g/L yeast extract, and polymyxin B. The amount of immunomagnetic beads (IMBs) and immunoreaction time were optimized. The capture efficiency was 58.32% with 0.4 mg IMBs when the immunoreaction time was 20 min. Capture of B. cereus by IMBs did not interfere with competing flora. Pre-enrichment IMS was validated with four B. cereus strains in artificially contaminated baby sprouts, bean sprouts, lettuce, and spinach at two levels (∼0.1 and ∼1 CFU/g). We were able to detect and isolate B. cereus in 40/40 samples of vegetables contaminated at 0.1 CFU/g with IMS after 6 h of enrichment in MBHI.
Collapse
Affiliation(s)
- Shuai Wei
- 3Department of Food Science and Biotechnology, School of Bioconvergence Science and Technology, Kangwon National University, Chuncheon, Gangwon, 24341 Korea
| | - Fereidoun Forghani
- 1Department of Microbiology, Immunology and Biochemistry, The University of Tennessee Health Science Center, Memphis, TN 38163 USA
| | - Youn-Seo Park
- 3Department of Food Science and Biotechnology, School of Bioconvergence Science and Technology, Kangwon National University, Chuncheon, Gangwon, 24341 Korea
| | - Byung-Jae Park
- 3Department of Food Science and Biotechnology, School of Bioconvergence Science and Technology, Kangwon National University, Chuncheon, Gangwon, 24341 Korea
| | - Kun-Ho Seo
- 2KU Center for Food Safety, College of Veterinary Medicine, Konkuk University, Seoul, 05029 Korea
| | - Deog-Hwan Oh
- 3Department of Food Science and Biotechnology, School of Bioconvergence Science and Technology, Kangwon National University, Chuncheon, Gangwon, 24341 Korea
| |
Collapse
|
34
|
Peterz M, Butot S, Jagadeesan B, Bakker D, Donaghy J. Thermal Inactivation of Mycobacterium avium subsp. paratuberculosis in Artificially Contaminated Milk by Direct Steam Injection. Appl Environ Microbiol 2016; 82:2800-2808. [PMID: 26944840 PMCID: PMC4836428 DOI: 10.1128/aem.04042-15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/23/2016] [Indexed: 01/06/2023] Open
Abstract
UNLABELLED The efficiency of direct steam injection (DSI) at 105 °C for 3 s to inactivate Mycobacterium avium subsp. paratuberculosis in milk at a pilot-plant scale was investigated. Milk samples were artificially contaminated with M. avium subsp. paratuberculosis and also with cow fecal material naturally infected with M. avium subsp. paratuberculosis. We also tested milk artificially contaminated with Mycobacterium smegmatis as a candidate surrogate to compare thermal inactivation between M. smegmatis and M. avium subsp. paratuberculosis. Following the DSI process, no viable M. avium subsp. paratuberculosis or M. smegmatis was recovered using culture methods for both strains. For pure M. avium subsp. paratuberculosis cultures, a minimum reduction of 5.6 log10 was achieved with DSI, and a minimum reduction of 5.7 log10 was found with M. smegmatis. The minimum log10 reduction for wild-type M. avium subsp. paratuberculosis naturally present in feces was 3.3. In addition, 44 dairy and nondairy powdered infant formula (PIF) ingredients used during the manufacturing process of PIF were tested for an alternate source for M. avium subsp. paratuberculosis and were found to be negative by quantitative PCR (qPCR). In conclusion, the results obtained from this study indicate that a >7-fold-log10 reduction of M. avium subsp. paratuberculosis in milk can be achieved with the applied DSI process. IMPORTANCE M. avium subsp. paratuberculosis is widespread in dairy herds in many countries. M. avium subsp. paratuberculosis is the causative agent of Johne's disease in cattle, and infected animals can directly or indirectly (i.e., fecal contamination) contaminate milk. Despite much research and debate, there is no conclusive evidence that M. avium subsp. paratuberculosis is a zoonotic bacterium, i.e., one that causes disease in humans. The presence of M. avium subsp. paratuberculosis or its DNA has been reported in dairy products, including pasteurized milk, cheese, and infant formula. In light of this, it is appropriate to evaluate existing mitigation measures to inactivate M. avium subsp. paratuberculosis in dairy products. The work conducted in this study describes the efficacy of direct steam injection, a thermal process commonly used in the dairy industry, to eliminate M. avium subsp. paratuberculosis and a surrogate bacterium in milk, thus ensuring the absence of M. avium subsp. paratuberculosis in dairy products subject to these process conditions.
Collapse
Affiliation(s)
- Mats Peterz
- Nestlé Research Center, Nestec Ltd., Lausanne, Switzerland
| | - Sophie Butot
- Nestlé Research Center, Nestec Ltd., Lausanne, Switzerland
| | | | - Douwe Bakker
- The Mycobact Consultancy, Lelystad, The Netherlands
| | | |
Collapse
|
35
|
Ngamsom B, Lopez-Martinez MJ, Raymond JC, Broyer P, Patel P, Pamme N. On-chip acoustophoretic isolation of microflora including S. typhimurium from raw chicken, beef and blood samples. J Microbiol Methods 2016; 123:79-86. [DOI: 10.1016/j.mimet.2016.01.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 01/29/2016] [Accepted: 01/29/2016] [Indexed: 10/22/2022]
|
36
|
Sha Y, Zhang X, Li W, Wu W, Wang S, Guo Z, Zhou J, Su X. A label-free multi-functionalized graphene oxide based electrochemiluminscence immunosensor for ultrasensitive and rapid detection of Vibrio parahaemolyticus in seawater and seafood. Talanta 2016; 147:220-5. [DOI: 10.1016/j.talanta.2015.09.058] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 09/18/2015] [Accepted: 09/24/2015] [Indexed: 11/29/2022]
|
37
|
Mao Y, Huang X, Xiong S, Xu H, Aguilar ZP, Xiong Y. Large-volume immunomagnetic separation combined with multiplex PCR assay for simultaneous detection of Listeria monocytogenes and Listeria ivanovii in lettuce. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.06.048] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
38
|
Wang Z, Wang D, Chen J, Sela DA, Nugen SR. Development of a novel bacteriophage based biomagnetic separation method as an aid for sensitive detection of viable Escherichia coli. Analyst 2015; 141:1009-16. [PMID: 26689710 DOI: 10.1039/c5an01769f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The application of bacteriophage combined with the use of magnetic separation techniques has emerged as a valuable tool for the sensitive identification and detection of bacteria. In this study, bacteriophage T7 labelled magnetic beads were developed for the detection of viable bacterial cells. Fusion of the biotin acceptor peptide (BAP) with the phage capsid protein gene and the insertion of the biotin ligase (BirA) gene enabled the display of the BAP ligand and the expression protein BirA during the replication cycle of phage infection. The replicated Escherichia coli specific bacteriophage was biotinylated in vivo and coated on magnetic beads via streptavidin-biotin interaction. Immobilization efficiency of the recombinant phage was investigated on magnetic beads and the phage-bead complex was evaluated by detecting E. coli from inoculated broth. When compared to the wild type phage, the recombinant phage T7birA-bap had a high immobilization density on streptavidin-coated magnetic beads and could capture 86.2% of E. coli cells from broth within 20 min. As this phage-based biomagnetic detection approach provided a low detection limit of 10(2) CFU mL(-1) without pre-enrichment, we believe this assay could be further developed to detect other bacteria of interest by applying host-specific phages. This would be of particular use in detecting bacteria which are difficult to grow or replicate slowly in culture.
Collapse
Affiliation(s)
- Ziyuan Wang
- University of Massachusetts, 246 Chenoweth, 102 Holdsworth Way, Amherst, MA, USA.
| | | | | | | | | |
Collapse
|
39
|
Fang B, Gon S, Nüsslein K, Santore MM. Surfaces for competitive selective bacterial capture from protein solutions. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10275-10282. [PMID: 25955769 DOI: 10.1021/acsami.5b00864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Active surfaces that form the basis for bacterial sensors for threat detection, food safety, or certain diagnostic applications rely on bacterial adhesion. However, bacteria capture from complex fluids on the active surfaces can be reduced by the competing adsorption of proteins and other large molecules. Such adsorption can also interfere with device performance. As a result, multiple upstream processing steps are frequently employed to separate macromolecules from any cells, which remain in the buffer. Here, we present an economical approach to capture bacteria, without competitive adsorption by proteins, on engineered surfaces that do not employ biomolecular recognition, antibodies, or other molecules with engineered sequences. The surfaces are based on polyethylene glycol (PEG) brushes that, on their own, repel both proteins and bacteria. These PEG brushes backfill the surface around sparsely adsorbed cationic polymer coils (here, poly-L-lysine (PLL)). The PLL coils are effectively embedded within the brush and produce locally cationic nanoscale regions that attract negatively charged regions of proteins or cells against the steric background repulsion from the PEG brush. By carefully designing the surfaces to include just enough PLL to capture bacteria, but not enough to capture proteins, we achieve sharp selectivity where S. aureus is captured from albumin- or fibrinogen-containing solutions, but free albumin or fibrinogen molecules are rejected from the surface. Bacterial adhesion on these surfaces is not reduced by competitive protein adsorption, in contrast to performance of more uniformly cationic surfaces. Also, protein adsorption to the bacteria does not interfere with capture, at least for the case of S. aureus, to which fibrinogen binds through a specific receptor.
Collapse
Affiliation(s)
- Bing Fang
- †Department of Polymer Science and Engineering, ‡Department of Chemical Engineering, and §Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Saugata Gon
- †Department of Polymer Science and Engineering, ‡Department of Chemical Engineering, and §Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Klaus Nüsslein
- †Department of Polymer Science and Engineering, ‡Department of Chemical Engineering, and §Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Maria M Santore
- †Department of Polymer Science and Engineering, ‡Department of Chemical Engineering, and §Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003, United States
| |
Collapse
|
40
|
Huang X, Xu Z, Mao Y, Ji Y, Xu H, Xiong Y, Li Y. Gold nanoparticle-based dynamic light scattering immunoassay for ultrasensitive detection of Listeria monocytogenes in lettuces. Biosens Bioelectron 2015; 66:184-90. [PMID: 25460900 DOI: 10.1016/j.bios.2014.11.016] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 11/03/2014] [Accepted: 11/09/2014] [Indexed: 01/24/2023]
Abstract
Gold nanoparticle (GNP)-based dynamic light scattering (DLS) assay has been widely used for sensitive detection of small analytes based on analyte binding-induced GNP aggregation. However, the use of this new method to detect large biological objectives, such as pathogenic bacteria, has not been reported. This study is the first to describe a homogeneous GNP-based DLS immunoassay for ultrasensitive detection of Listeria monocytogenes. Compared with small analytes, L. monocytogenes has a larger surface and a higher number of antigen epitopes, which serve as carriers that bind to GNP probes to form "GNP-coated bacteria" complexes. To achieve better analytical performance, various parameters including GNP diameter and concentration, amount of labeled antibodies, and immunoreaction time were systematically investigated and optimized. Under the developed optimum conditions, limit of detection (LOD) for L. monocytogenes reached as low as 3.5×10(1)CFUmL(-1) in 0.01M phosphate-buffered saline. Coupled with a large-volume immunomagnetic separation method, LOD for spiked lettuce samples reached 2.2×10(1)CFUg(-1), which was one order of magnitude lower than the maximum limit imposed in Canada (100CFUg(-1)). The proposed method also exhibited excellent discrimination against 17 common pathogenic bacteria in lettuces. The developed GNP-based DLS immunoassay is highly promising as an approach for detecting large biological objectives.
Collapse
Affiliation(s)
- Xiaolin Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China
| | - Zhaodi Xu
- Centre of Analysis and Test, Nanchang University, Nanchang 330047, PR China
| | - Yan Mao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Yanwei Ji
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China.
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China.
| | - Yanbin Li
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, United States
| |
Collapse
|
41
|
Shan S, Lai W, Xiong Y, Wei H, Xu H. Novel strategies to enhance lateral flow immunoassay sensitivity for detecting foodborne pathogens. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:745-53. [PMID: 25539027 DOI: 10.1021/jf5046415] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Food contaminated by foodborne pathogens causes diseases, affects individuals, and even kills those affected individuals. As such, rapid and sensitive detection methods should be developed to screen pathogens in food. One current detection method is lateral flow immunoassay, an efficient technique because of several advantages, including rapidity, simplicity, stability, portability, and sensitivity. This review presents the format and principle of lateral flow immunoassay strip and the development of conventional lateral flow immunoassay for detecting foodborne pathogens. Furthermore, novel strategies that can be applied to enhance the sensitivity of lateral flow immunoassay to detect foodborne pathogens are presented; these strategies include innovating new label application, designing new formats of lateral flow immunoassay, combining with other methods, and developing signal amplification systems. With these advancements, detection sensitivity and detection time can be greatly improved.
Collapse
Affiliation(s)
- Shan Shan
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, China
| | | | | | | | | |
Collapse
|