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Liu Y, Liu H, Yu G, Sun W, Aizaz M, Yang G, Chen L. One-tube RPA-CRISPR Cas12a/Cas13a rapid detection of methicillin-resistant Staphylococcus aureus. Anal Chim Acta 2023; 1278:341757. [PMID: 37709482 DOI: 10.1016/j.aca.2023.341757] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 08/25/2023] [Indexed: 09/16/2023]
Abstract
At present, methicillin-resistant Staphylococcus aureus (MRSA) has caused a serious impact on a global scale. The infection and carrier rate of MRSA in the community is increasing year by year, but there is still no convenient detection system for on-site rapid detection. It is very important to select a rapid detection system to accurately and quickly detect patients infected with MRSA. We have developed a high-efficient single-tube detection platform based on RPA and CRISPR reaction system to detect the genes of mecA and clfA of MRSA. Using this detection platform, visual MRSA detection could be achieved in 30 min. It was observed that this detection platform was capable to successfully detect the target genomic as low as 5 copies μL-1, and the reaction was completed in one step without opening the lid. This detection platform could only detect MRSA, but not other common clinical pathogenic bacteria, such as Salmonella, Pseudomonas aeruginosa, Staphylococcus xylosus, Aeromonas hydrophila, Escherichia coli and Staphylococcus warneri, indicated its satisfactory selectivity for MRSA without interference from other bacteria. The results of clinical samples show that the platform has outstanding advantages in sensitivity, specificity and identification of methicillin resistance. The entire reaction can be completed in one step in the handheld instrument without opening the cover, avoiding aerosol pollution during the reaction. The detection platform combined with handheld instruments will have great application potential in point-of-care testing.
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Affiliation(s)
- Yujie Liu
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
| | - Hui Liu
- Jinan Center for Disease Control and Prevention, Jinan, Shandong, China
| | - Guanliu Yu
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
| | - Wenbo Sun
- Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, Shandong, China
| | - Muhammad Aizaz
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
| | - Guiwen Yang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China
| | - Lei Chen
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, Shandong, China.
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2
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Zheng Z, Ma L, Li B, Zhang X. Dual-Modal Biosensor for Staphylococcus aureus Detection Based on a Porphyrin-Based Porous Organic Polymer FePor-TPA with Excellent Peroxidase-like, Catalase-like, and Photoelectrochemical Properties. Anal Chem 2023; 95:13855-13863. [PMID: 37672712 DOI: 10.1021/acs.analchem.3c01950] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Bacterial infections seriously harm human health and cause many severe diseases, which triggered urgent demands to exploit specific and sensitive biosensor strategies for Staphylococcus aureus detection. Here, a colorimetric and photoelectrochemical dual-mode biosensor for S. aureus assay based on FePor-TPA was constructed. 2D FePor-TPA thin film and its bulk powder (FePor-TPA) were synthesized by in situ growth on ITO and a solvothermal condition, respectively, both of which exhibited excellent peroxidase-like and catalase-like activity, originating from their metalloporphyrin linkers. Benefiting from the in situ growth on ITO electrodes, the 2D FePor-TPA thin film also possessed a more ordered stacking mode and in turn exhibited good electrical conductivity, stable initial photocurrent, and high sensitivity to O2. As for bulk FePor-TPA, its porous structure and high specific surface area make it a possible scaffold to load an amount of AuNPs, the rabbit anti-Staphylococcus aureus Rosenbach tropina antibody (Ab2), and GOx for constructing the signal probe (GOx/Ab2@Au@FePor-TPA) and realizing catalytic amplification. With these satisfactory features in mind, the 2D FePor-TPA thin film and its bulk powder (FePor-TPA) were utilized to construct a dual and signal-on bioplatform for sensitively and selectively detecting S. aureus, which, as far as we know, has not been reported.
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Affiliation(s)
- Zekun Zheng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Long Ma
- Test center of Shandong Bureau, China Metallurgical Geology Bureau, Jinan 250014, China
| | - Baoyu Li
- Test center of Shandong Bureau, China Metallurgical Geology Bureau, Jinan 250014, China
| | - Xiaomei Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
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3
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Chen Y, Chen Y, Yi HC, Gu HW, Yin XL, Xiang DL, Zou P. An electrochemical and colorimetric dual-mode aptasensor for Staphylococcus aureus based on a multifunctional MOF and magnetic separation technique. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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4
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Li T, Jin L, Feng K, Yang T, Yue X, Wu B, Ding S, Liang X, Huang G, Zhang J. A novel low-field NMR biosensor based on dendritic superparamagnetic iron oxide nanoparticles for the rapid detection of Salmonella in milk. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.110149] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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5
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Cai R, Yin F, Chen H, Tian Y, Zhou N. A fluorescent aptasensor for Staphylococcus aureus based on strand displacement amplification and self-assembled DNA hexagonal structure. Mikrochim Acta 2020; 187:304. [PMID: 32350613 DOI: 10.1007/s00604-020-04293-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 04/22/2020] [Indexed: 12/14/2022]
Abstract
A fluorescent aptasensor for Staphylococcus aureus (S. aureus) is designed, which takes advantage of strand displacement amplification (SDA) technology and unique self-assembled DNA hexagonal structure. In the presence of S. aureus, a partially complementary strand of S. aureus aptamer (cDNA) is competitively released from cDNA/aptamer duplex immobilized on magnetic beads due to the affinity of the aptamer for S. aureus. The addition of primer starts the SDA reaction. With the catalysis of Bsm DNA polymerase and Nb.bpu10I endonuclease, a large number of single-stranded DNA (ssDNA) is produced, which induces the opening of a hairpin probe and the subsequent self-assembly to form a hexagonal structure. The staining of the DNA hexagon with SYBR Green I excites the fluorescence signal, which is used for detection. The aptasensor exhibits a broad linear range from 7 to 7 × 107 CFU/mL, with a detection limit of 1.7 CFU/mL for S. aureus. The sensor shows negligible responses to other bacteria. Moreover, the aptasensor has been applied to detect S. aureus in milk samples, and the results demonstrate the general applicability of the sensor and its prospect in systematic detection of S. aureus in food safety control and medicine-related fields. Graphical abstract The presence of S. aureus can be converted to the formation of unique DNA hexagonal structure and subsequent fluorescent signal by the combination of SDA with self-assembly technology.
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Affiliation(s)
- Rongfeng Cai
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Fan Yin
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Haohan Chen
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Yaping Tian
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Nandi Zhou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
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6
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Yin M, Wu C, Li H, Jia Z, Deng Q, Wang S, Zhang Y. Simultaneous Sensing of Seven Pathogenic Bacteria by Guanidine-Functionalized Upconversion Fluorescent Nanoparticles. ACS OMEGA 2019; 4:8953-8959. [PMID: 31459983 PMCID: PMC6648614 DOI: 10.1021/acsomega.9b00775] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 05/09/2019] [Indexed: 05/27/2023]
Abstract
The method capable of simultaneously detecting multiple target bacterial pathogens is necessary and of great interest. In this research, we demonstrated our initial effort to simultaneously detect seven common foodborne bacteria by developing a straightforward upconversion fluorescence sensing approach. The fluorescent nanosensor was constructed from a designed guanidine-functionalized upconversion fluorescent nanoparticles (UCNPs@GDN), tannic acid, and hydrogen peroxide (HP) and could quantify pathogenic bacteria in a nonspecific manner because the luminescence of the upconversion fluorescent nanoparticle was effectively strengthened in the presence of bacteria. When the developed nanosensor was applied to quantify multiple bacteria including Escherichia coli, Salmonella, Cronobacter sakazakii, Shigella flexneri, Vibrio parahaemolyticus, Staphylococcus aureus, and Listeria monocytogenes, a linear range of 103 to 108 cfu mL-1 and a detection limit of 1.30 × 102 cfu mL-1 have been obtained for the seven model mixture bacteria. In addition, the similar linear range and detection limit were also obtained for the detection of single bacteria. The present approach also exhibited acceptable recovery values ranging from 70.0 to 118.2% for bacteria in real samples (water, milk, and beef). All these results suggested that the guanidine-functionalized upconversion fluorescent nanosensor could be considered as a promising candidate for the rapid detection and surveillance of microbial pollutants in food and water.
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Affiliation(s)
- Mingyuan Yin
- Key
Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin
Key Laboratory of Food Nutrition and Safety, College of Chemical Engineering
and Materials Science, Tianjin University
of Science and Technology, Tianjin 300457, P. R. China
| | - Chen Wu
- Key
Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin
Key Laboratory of Food Nutrition and Safety, College of Chemical Engineering
and Materials Science, Tianjin University
of Science and Technology, Tianjin 300457, P. R. China
| | - Haijie Li
- Key
Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin
Key Laboratory of Food Nutrition and Safety, College of Chemical Engineering
and Materials Science, Tianjin University
of Science and Technology, Tianjin 300457, P. R. China
| | - Zhixin Jia
- Key
Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin
Key Laboratory of Food Nutrition and Safety, College of Chemical Engineering
and Materials Science, Tianjin University
of Science and Technology, Tianjin 300457, P. R. China
| | - Qiliang Deng
- Key
Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin
Key Laboratory of Food Nutrition and Safety, College of Chemical Engineering
and Materials Science, Tianjin University
of Science and Technology, Tianjin 300457, P. R. China
| | - Shuo Wang
- Key
Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin
Key Laboratory of Food Nutrition and Safety, College of Chemical Engineering
and Materials Science, Tianjin University
of Science and Technology, Tianjin 300457, P. R. China
- Beijing
Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, 11 Fucheng Road, Beijing 100048, China
| | - Yukui Zhang
- Key
Laboratory of Separation Science for Analytical Chemistry, Dalian
Institute of Chemical Physics, Chinese Academic
of Sciences, Dalian 116023, P. R. China
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7
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Shan Y, Xu C, Wang M, Zhu Z, Wu FG, Shi Z, Cui Q, Arumugam GM. Bilinear Staphylococcus aureus detection based on suspension immunoassay. Talanta 2019; 192:154-159. [DOI: 10.1016/j.talanta.2018.09.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/06/2018] [Accepted: 09/09/2018] [Indexed: 12/23/2022]
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8
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Specific detection and effective inhibition of a single bacterial species in situ using peptide mineralized Au cluster probes. Sci China Chem 2018. [DOI: 10.1007/s11426-017-9206-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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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: 67] [Impact Index Per Article: 9.6] [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.
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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
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10
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Qafari SM, Ahmadian G, Mohammadi M. One-step purification and oriented attachment of protein A on silica and graphene oxide nanoparticles using sortase-mediated immobilization. RSC Adv 2017. [DOI: 10.1039/c7ra12128h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One-step purification and oriented immobilization of protein A on functionalized carriers.
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Affiliation(s)
- Seyed Mehdi Qafari
- Systems Biotechnology Department
- Institute of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
| | - Gholamreza Ahmadian
- Systems Biotechnology Department
- Institute of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
| | - Mehdi Mohammadi
- Bioprocess Engineering Department
- Institute of Industrial and Environmental Biotechnology
- National Institute of Genetic Engineering and Biotechnology (NIGEB)
- Tehran
- Iran
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11
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Yang S, Ouyang H, Su X, Gao H, Kong W, Wang M, Shu Q, Fu Z. Dual-recognition detection of Staphylococcus aureus using vancomycin-functionalized magnetic beads as concentration carriers. Biosens Bioelectron 2016; 78:174-180. [DOI: 10.1016/j.bios.2015.11.041] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 11/10/2015] [Accepted: 11/13/2015] [Indexed: 01/14/2023]
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12
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Shangguan J, Li Y, He D, He X, Wang K, Zou Z, Shi H. A combination of positive dielectrophoresis driven on-line enrichment and aptamer-fluorescent silica nanoparticle label for rapid and sensitive detection of Staphylococcus aureus. Analyst 2016; 140:4489-97. [PMID: 25963028 DOI: 10.1039/c5an00535c] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Staphylococcus aureus (S. aureus) is an important human pathogen that causes several diseases ranging from superficial skin infections to life-threatening diseases. Here, a method combining positive dielectrophoresis (pDEP) driven on-line enrichment and aptamer-fluorescent silica nanoparticle label has been developed for the rapid and sensitive detection of S. aureus in microfluidic channels. An aptamer, having high affinity to S. aureus, is used as the molecular recognition tool and immobilized onto chloropropyl functionalized fluorescent silica nanoparticles through a click chemistry approach to obtain S. aureus aptamer-nanoparticle bioconjugates (Apt(S.aureus)/FNPs). The pDEP driven on-line enrichment technology was used for accumulating the Apt(S.aureus)/FNP labeled S. aureus. After incubating with S. aureus, the mixture of Apt(S.aureus)/FNP labeled S. aureus and Apt(S.aureus)/FNPs was directly introduced into the pDEP-based microfluidic system. By applying an AC voltage in a pDEP frequency region, the Apt(S.aureus)/FNP labelled S. aureus moved to the electrodes and accumulated in the electrode gap, while the free Apt(S.aureus)/FNPs flowed away. The signal that came from the Apt(S.aureus)/FNP labelled S. aureus in the focused detection areas was then detected. Profiting from the specificity of aptamer, signal amplification of FNP label and pDEP on-line enrichment, this assay can detect as low as 93 and 270 cfu mL(-1)S. aureus in deionized water and spiked water samples, respectively, with higher sensitivities than our previously reported Apt(S.aureus)/FNP based flow cytometry. Moreover, without the need for separation and washing steps usually required for FNP label involved bioassays, the total assay time including sample pretreatment was within 2 h.
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Affiliation(s)
- Jingfang Shangguan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China.
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13
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Gautam S, Kim T, Lester E, Deep D, Spiegel DA. Wall teichoic acids prevent antibody binding to epitopes within the cell wall of Staphylococcus aureus. ACS Chem Biol 2016; 11:25-30. [PMID: 26502318 DOI: 10.1021/acschembio.5b00439] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Staphylococcus aureus is a Gram-positive bacterial pathogen that produces a range of infections including cellulitis, pneumonia, and septicemia. The principle mechanism in antistaphylococcal host defense is opsonization with antibodies and complement proteins, followed by phagocytic clearance. Here we use a previously developed technique for installing chemical epitopes in the peptidoglycan cell wall to show that surface glycopolymers known as wall teichoic acids conceal cell wall epitopes, preventing their recognition and opsonization by antibodies. Thus, our results reveal a previously unrecognized immunoevasive role for wall teichoic acids in S. aureus: repulsion of peptidoglycan-targeted antibodies.
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Affiliation(s)
- Samir Gautam
- Department
of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Taehan Kim
- Department
of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Evan Lester
- Department
of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - Deeksha Deep
- Department
of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
| | - David A. Spiegel
- Department
of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, United States
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14
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Cheng D, Yu M, Fu F, Han W, Li G, Xie J, Song Y, Swihart MT, Song E. Dual Recognition Strategy for Specific and Sensitive Detection of Bacteria Using Aptamer-Coated Magnetic Beads and Antibiotic-Capped Gold Nanoclusters. Anal Chem 2015; 88:820-5. [PMID: 26641108 DOI: 10.1021/acs.analchem.5b03320] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Food poisoning and infectious diseases caused by pathogenic bacteria such as Staphylococcus aureus (SA) are serious public health concerns. A method of specific, sensitive, and rapid detection of such bacteria is essential and important. This study presents a strategy that combines aptamer and antibiotic-based dual recognition units with magnetic enrichment and fluorescent detection to achieve specific and sensitive quantification of SA in authentic specimens and in the presence of much higher concentrations of other bacteria. Aptamer-coated magnetic beads (Apt-MB) were employed for specific capture of SA. Vancomycin-stabilized fluorescent gold nanoclusters (AuNCs@Van) were prepared by a simple one-step process and used for sensitive quantification of SA in the range of 32-10(8) cfu/mL with the detection limit of 16 cfu/mL via a fluorescence intensity measurement. And using this strategy, about 70 cfu/mL of SA in complex samples (containing 3 × 10(8) cfu/mL of other different contaminated bacteria) could be successfully detected. In comparison to prior studies, the developed strategy here not only simplifies the preparation procedure of the fluorescent probes (AuNCs@Van) to a great extent but also could sensitively quantify SA in the presence of much higher concentrations of other bacteria directly with good accuracy. Moreover, the aptamer and antibiotic used in this strategy are much less expensive and widely available compared to common-used antibodies, making it cost-effective. This general aptamer- and antibiotic-based dual recognition strategy, combined with magnetic enrichment and fluorescent detection of trace bacteria, shows great potential application in monitoring bacterial food contamination and infectious diseases.
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Affiliation(s)
- Dan Cheng
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Mengqun Yu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Fei Fu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Weiye Han
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Gan Li
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Jianping Xie
- College of Life Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Yang Song
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
| | - Mark T Swihart
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York , Buffalo, New York 14260, United States
| | - Erqun Song
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University , Chongqing 400715, People's Republic of China
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15
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Pastells C, Acosta G, Pascual N, Albericio F, Royo M, Marco MP. An immunochemical strategy based on peptidoglycan synthetic peptide epitopes to diagnose Staphylococcus aureus infections. Anal Chim Acta 2015; 889:203-11. [DOI: 10.1016/j.aca.2015.07.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 07/07/2015] [Accepted: 07/16/2015] [Indexed: 11/24/2022]
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16
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Yu Q, Wang Q, Li B, Lin Q, Duan Y. Technological Development of Antibody Immobilization for Optical Immunoassays: Progress and Prospects. Crit Rev Anal Chem 2014. [DOI: 10.1080/10408347.2014.881249] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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