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Liu Y, Meng X, Ma Z, Gu H, Luo X, Yin X, Yi H, Chen Y. Hybrid recognition-enabled ratiometric electrochemical sensing of Staphylococcus aureus via in-situ growth of MOF/Ti 3C 2T x-MXene and a self-reporting bacterial imprinted polymer. Food Chem 2024; 463:141496. [PMID: 39378721 DOI: 10.1016/j.foodchem.2024.141496] [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: 07/26/2024] [Revised: 09/07/2024] [Accepted: 09/29/2024] [Indexed: 10/10/2024]
Abstract
Rapid and effective analysis of foodborne bacteria is crucial for preventing and controlling bacterial infections. Here, we present the synthesis of a self-reporting molecularly imprinted polymer (MIP) as an inner reference probe (IR), and the in-situ growth of metal-organic frameworks on transition metal carbon nitrides (MOF/Ti3C2TX-MXene) as a signaling nanoprobe (SP). These advancements are then applied in a ratiometric electrochemical bioassay for Staphylococcus aureus (S. aureus) using a hybrid recognition mechanism. When S. aureus is present, the aptamer-integrated MIP (MIP@Apt) efficiently captures it, followed by binding with SP to form a sandwich structure. This leads to decreased current response of IR (IIR) and increased current intensity of SP (Isp), enabling quantification through utilization of the ISP to IIR ratio. The biosensor shows a wide detection range (10-108 CFU mL-1) and low detection limit of 1.2 CFU mL-1. Its feasibility for testing complex samples indicates the potential application in food analysis.
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Affiliation(s)
- Yang Liu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Xianzhu Meng
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Zhongrui Ma
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Huiwen Gu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Xiao Luo
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Xiaoli Yin
- College of Life Sciences, Yangtze University, Jingzhou 434025, China
| | - Hongchao Yi
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Ying Chen
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China.
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Lai Y, Jiang G, Liang T, Huang X, Jiang W, Xu W, Sun R, Dai Z, Li C. Rapid analysis of Bacillus cereus spore biomarkers based on porous channel cuttlebone SERS substrate. Anal Chim Acta 2024; 1320:343034. [PMID: 39142776 DOI: 10.1016/j.aca.2024.343034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 07/13/2024] [Accepted: 07/26/2024] [Indexed: 08/16/2024]
Abstract
BACKGROUND Bacillus cereus (B. cereus) is a widespread conditional pathogen that affects food safety and human health. Conventional methods such as bacteria culture and polymerase chain reaction (PCR) are difficult to use for rapid identification of bacterial spores because of the relatively long analysis times. From a human health perspective, there is an urgent need to develop an ultrasensitive, rapid, and accurate method for the detection of B. cereus spores. RESULTS The study proposed a new method for rapidly and sensitively detecting the biomarkers of bacterial spores via surface-enhanced Raman spectroscopy (SERS) combined with electrochemical enrichment. The 2,6-Pyridinedicarboxylic acid (DPA) was used as the model analyte to acts as a biomarker of B. cereus spores. The SERS substrate was developed via the in-situ generation of Ag nanoparticles (AgNPs) in a cuttlebone-derived organic matrix (CDOM). Because of the depletion of chitin reduction sites on the CDOM, the pores of the porous channels expanded. The pores diameter of the AgNPs/CDOM porous channel was found to be in the range of 0.7-1.3 nm through molecular diffusion experiments. Based on the porosity of AgNPs/CDOM substrates and the high sensitivity of SERS substrates, the sensor can rapidly and accurately electronically enrich DPA in 40 s with the limit of detection (LOD) of 0.3 nM. SIGNIFICANCE The results demonstrate that electrochemically assisted SERS substrates can be served as a high sensitivity electrochemical-enrichment device for the rapid and sensitive detection of bacterial spores with minimal interference from potentially coexisting species in biological samples. In this study, it opens up a platform to explore the application of porous channels in natural bio-derived materials in the field of food safety.
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Affiliation(s)
- Yuping Lai
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China
| | - Guangzheng Jiang
- Guangxi Engineering Research Center of Processing & Storage of Characteristic and Advantage Aquatic Products, Guangxi Academy of Fishery Sciences, Nanning, 530021, China
| | - Tianhang Liang
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China
| | - Xiaoxin Huang
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China
| | - Wanjun Jiang
- The North China Sea Area & Island Center, Ministry of Natural Resources, Qingdao, 266061, China.
| | - Wenhui Xu
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China
| | - Ruikun Sun
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518108, China
| | - Zhenqing Dai
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518108, China.
| | - Chengyong Li
- School of Chemistry and Environment, Guangdong Ocean University, Analytical and Testing Center of Guangdong Ocean University, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Zhanjiang, 524088, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518108, China.
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Jiang F, Wang L, Jin N, Yuan J, Li Y, Lin J. Magnetic nanobead chain-assisted real-time impedance monitoring using PCB interdigitated electrode for Salmonella detection. iScience 2023; 26:108245. [PMID: 38026200 PMCID: PMC10651675 DOI: 10.1016/j.isci.2023.108245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 07/03/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
Pathogen testing is effective to prevent food poisoning. Here, an electrochemical biosensor was explored for Salmonella detection by combining magnetic grid based bacterial separation with enzymatic catalysis based signal amplification on a PCB interdigitated electrode in a microfluidic chip. First, immune magnetic nanobeads, target bacteria, and immune polystyrene microspheres decorated with glucose oxidase were sufficiently mixed to form nanobead-bacteria-microsphere sandwich conjugates. Then, these conjugates were injected into the chip to form conjugate chains right over the electrode under an iron grid enhanced magnetic field. After non-conductive glucose was injected and catalyzed by glucose oxidase on the conjugate chains, conductive glucose acid and non-conductive hydrogen peroxide were continuously produced and rapidly diffused from the conjugate chains to the electrode. Finally, the impedance change was real-timely monitored and used to determine the bacterial amount. This sensor enabled detection of 50 CFU/mL Salmonella typhimurium in 1 h.
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Affiliation(s)
- Fan Jiang
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, China
| | - Lei Wang
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, China
| | - Nana Jin
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, China
| | - Jing Yuan
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, China
| | - Yanbin Li
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Jianhan Lin
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100083, China
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Nadiya S, Kolla HB, Reddy PN. Optimization and evaluation of a multiplex PCR assay for detection of Staphylococcus aureus and its major virulence genes for assessing food safety. Braz J Microbiol 2023; 54:311-321. [PMID: 36690906 PMCID: PMC9944222 DOI: 10.1007/s42770-023-00906-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 01/15/2023] [Indexed: 01/25/2023] Open
Abstract
Staphylococcus aureus is a natural commensal microflora of humans which causes opportunistic infections due to its large arsenal of exotoxins, invasion, immune evasion, and antibiotic resistance mechanisms. The primary goal of this study is to develop a multiplex PCR (mPCR) assay for simultaneous detection of Staphylococcus aureus (nuc) and its virulence genes coding for prominent exotoxins namely alpha hemolysin (hla), enterotoxins A (sea), enterotoxin B (seb), toxic shock syndrome toxin (tsst-1), and the gene coding for methicillin resistance (mecA). A competitive internal amplification control (IAC) was included in the assay to exclude the false negative outcomes. Highly specific primer pairs were designed for the target genes using in silico resources. At the outset, monoplex PCRs were standardized using reference S. aureus strains. Primer specificity to the target genes was authenticated through restriction digestion analysis of amplified PCR products. Multiplex PCR was optimized in increments of one gene starting with nuc and IAC amplified simultaneously using one pair of primers (nuc) in a competitive manner. The mPCR assay was found to be highly sensitive with a detection limit of ~10 CFUs per reaction for pure cultures. Multiplex PCR assay was further evaluated on the retail and processed food samples to test the prevalence of S. aureus and study their exotoxin profiles. Of the 57 samples examined, 13 samples (22.80%) were found to be contaminated with S. aureus whose DNA was extracted after a 6-h enrichment period. Among these, a high percentage of hemolytic and enterotoxin A positive strains were encountered. The mPCR assay developed in this study would be a useful tool for rapid and reliable monitoring of S. aureus for food quality testing and from clinical infections.
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Affiliation(s)
- Shaik Nadiya
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Vadlamudi, Andhra Pradesh, Guntur district, 522 213, India
| | - Harish Babu Kolla
- Department of Biotechnology, Vignan's Foundation for Science, Technology and Research (Deemed to be University), Vadlamudi, Andhra Pradesh, Guntur district, 522 213, India
| | - Prakash Narayana Reddy
- Department of Microbiology, Dr. V.S. Krishna Government Degree College (Autonomous), Maddilapalem, Visakhapatnam, Andhra Pradesh, 530 013, India.
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Bai X, Wang Z, Li W, Xiao F, Xu H. Portable sensor based on magnetic separation and enzyme-mediated immune nanomaterials for point-of-care testing of Listeria monocytogenes in food. Anal Chim Acta 2022; 1236:340576. [PMID: 36396231 DOI: 10.1016/j.aca.2022.340576] [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: 07/03/2022] [Revised: 10/03/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022]
Abstract
Listeria monocytogenes (L. monocytogenes), a typical foodborne pathogen, poses a serious threat to public health safety. This stimulates to develop a point-of-care testing (POCT) method to achieve rapid, sensitive detection of L. monocytogenes. In this study, polyethylene glycol (PEG) mediated ampicillin functionalized magnetic beads (Amp-PEG-MBs) was prepared successfully and it achieved high efficiency (>90%) and rapid (5 min) capture for L. monocytogenes at room temperature. The innovative combination of antibody (Ab), glucose oxidase (GOD) and graphene oxide (GO) prepared Ab@GO@GOD for the specific recognition of L. monocytogenes. Finally, Amp-PEG-MBs and Ab@GO@GOD were successfully assembled into Amp-PEG-MBs@L. monocytogenes-Ab@GO@GOD sandwich structure which could catalyze the glucose, and the final detection results were recorded by a blood glucose meter (BGM). Magnetic separation (MS) combined with enzyme-catalyzed sensor (MS-Ab@GO@GOD-BGM) was successfully established to achieve the detection of L. monocytogenes in artificially contaminated juice within 66 min with the limit of detection was 101 CFU/mL. This sensor has potential for other pathogens detection by modifying specific antibodies.
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Affiliation(s)
- Xuekun Bai
- 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
| | - Fangbin Xiao
- 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.
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Wang L, Qi W, Wang M, Jiang F, Ding Y, Xi X, Liao M, Li Y, Lin J. A pipette-adapted biosensor for Salmonella detection. Biosens Bioelectron 2022; 218:114765. [DOI: 10.1016/j.bios.2022.114765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/22/2022] [Accepted: 09/25/2022] [Indexed: 11/02/2022]
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Bai X, Wang Z, Li W, Xiao F, Huang J, Xu Q, Xu H. Rapid and accurate detection for Listeria monocytogenes in milk using ampicillin-mediated magnetic separation coupled with quantitative real-time PCR. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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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.
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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
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Wu T, Wang C, Wu M, Wang P, Feng Q. Novel integrating polymethylene blue nanoparticles with dumbbell hybridization chain reaction for electrochemical detection of pathogenic bacteria. Food Chem 2022; 382:132501. [PMID: 35245759 DOI: 10.1016/j.foodchem.2022.132501] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/19/2022] [Accepted: 02/16/2022] [Indexed: 11/24/2022]
Abstract
Pathogenic bacteria infections pose a major threat to human health which can be found in contaminated food and infected humans. Herein, an electrochemical sensor was developed for pathogenic bacteria assay using a dual amplification strategy of polymethylene blue nanoparticles (pMB NPs) and dumbbell hybridization chain reaction (DHCR). The strong binding ability of aptamer to targets endowed outstanding performance in identifying Staphylococcus aureus (S. aureus) among other typical bacteria. The released T strands were hybridized with capture DNA on electrode surface which triggered DHCR in the presence of two dumbbell-shaped helper DNA, leading to the formation of extended and tight dsDNA polymers. In combination with pMB NPs (redox indicators), S. aureus was quantitatively detected in a range of 10-108 CFU/mL and the detection limit reached 1 CFU/mL. Moreover, this sensor was successfully applied for S. aureus detection in human serum and foods, demonstrating the reliability in practical applications.
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Affiliation(s)
- Tao Wu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Chengcheng Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Meisheng Wu
- Department of Chemistry, College of Science, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, PR China.
| | - Po Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Qiumei Feng
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China.
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