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Poncelet L, Malic L, Clime L, Geissler M, Morton KJ, Nassif C, Da Fonte D, Veilleux G, Veres T. Multifunctional magnetic nanoparticle cloud assemblies for in situ capture of bacteria and isolation of microbial DNA. Analyst 2021; 146:7491-7502. [PMID: 34643195 DOI: 10.1039/d1an01297e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We investigate the formation of suspended magnetic nanoparticle (MNP) assemblies (M-clouds) and their use for in situ bacterial capture and DNA extraction. M-clouds are obtained as a result of magnetic field density variations when magnetizing an array of micropillars coated with a soft ferromagnetic NiP layer. Numerical simulations suggest that the gradient in the magnetic field created by the pillars is four orders of magnitude higher than the gradient generated by the external magnets. The pillars therefore serve as the sole magnetic capture sites for MNPs which accumulate on opposite sides of each pillar facing the magnets. Composed of loosely aggregated MNPs, the M-cloud can serve as a porous capture matrix for target analyte flowing through the array. The concept is demonstrated by using a multifunctional M-cloud comprising immunomagnetic NPs (iMNPs) for capture of Escherichia coli O157:H7 from river water along with silica-coated NPs for subsequent isolation and purification of microbial DNA released upon bacterial lysis. Confocal microscopy imaging of fluorescently labeled iMNPs and E. coli O157:H7 reveals that bacteria are trapped in the M-cloud region between micropillars. Quantitative assessment of in situ bacterial capture, lysis and DNA isolation using real-time polymerase chain reaction shows linear correlation between DNA output and input bacteria concentration, making it possible to confirm E. coli 0157:H7 at 103 cells per mL. The M-cloud method further provides one order of magnitude higher DNA output concentrations than incubation of the sample with iMNPs in a tube for an equivalent period of time (e.g., 10 min). Results from assays performed in the presence of Listeria monocytogenes (at 106 cells per mL each) suggest that non-target organisms do not affect on-chip E. coli capture, DNA extraction efficiency and quality of the eluted sample.
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Affiliation(s)
- Lucas Poncelet
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Lidija Malic
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Liviu Clime
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Matthias Geissler
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Keith J Morton
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Christina Nassif
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Dillon Da Fonte
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Gaétan Veilleux
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
| | - Teodor Veres
- Life Sciences Division, National Research Council of Canada, 75 Boulevard de Mortagne, Boucherville, QC, J4B 6Y4, Canada.
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Jangpatarapongsa K, Saimuang K, Polpanich D, Thiramanas R, Techakasikornpanich M, Yudech P, Paripurana V, Leepiyasakulchai C, Tangboriboonrat P. Increased sensitivity of enterotoxigenic Escherichia coli detection in stool samples using oligonucleotide immobilized-magnetic nanoparticles. ACTA ACUST UNITED AC 2021; 32:e00677. [PMID: 34631437 PMCID: PMC8487978 DOI: 10.1016/j.btre.2021.e00677] [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: 03/20/2021] [Revised: 09/04/2021] [Accepted: 09/12/2021] [Indexed: 12/01/2022]
Abstract
A rapid detection of ETEC DNA with high sensitivity and specificity. The combination between magnetic nanoparticles and molecular technique. 100-folds increase of sensitivity compared with gold standard.
PCR detection of enterotoxigenic Escherichia-coli (ETEC) can be used directly on stool sample. However, it still has limitations due to presence of PCR inhibitors and interferences. This study, oligonucleotide primer specific to ETEC was immobilized onto MNPs and applied for separation and enrichment of ETEC-DNA from contaminants in stool after boiling. DNA separation efficiency was evaluated using conventional PCR and magneto-PCR-enzyme linked-gene-assay (MELGA). Due to high specificity of primer and efficiency of nanoparticles to bring down PCR inhibitors, DNA separation using primer-immobilized-MNPs exhibited 100-fold increase of sensitivity compared to that using simple boiling. Moreover, the sensitivities in stool were increased from 108 to 106 CFU/mL and 104 to 102 CFU/mL when PCR products were detected by gel electrophoresis and MELGA, respectively. Results suggested that oligonucleotide-immobilized-MNPs combined with boiling DNA extraction method was successfully used to separate the DNA of ETEC in stool with high sensitivity using MELGA.
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Affiliation(s)
- Kulachart Jangpatarapongsa
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, 10700, Thailand
| | - Kween Saimuang
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, 10700, Thailand
| | - Duangporn Polpanich
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Raweewan Thiramanas
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Mongkol Techakasikornpanich
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, 10700, Thailand
| | - Papichaya Yudech
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, 10700, Thailand
| | - Venusrin Paripurana
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, 10700, Thailand
| | - Chaniya Leepiyasakulchai
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Bangkok, 10700, Thailand
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3
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High gradient magnetic separation with involved Basset history force: Configuration with single axial wire. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.02.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Brechmann NA, Eriksson PO, Eriksson K, Oscarsson S, Buijs J, Shokri A, Hjälm G, Chotteau V. Pilot-scale process for magnetic bead purification of antibodies directly from non-clarified CHO cell culture. Biotechnol Prog 2019; 35:e2775. [PMID: 30629859 PMCID: PMC6617771 DOI: 10.1002/btpr.2775] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/31/2018] [Accepted: 12/31/2018] [Indexed: 11/20/2022]
Abstract
High capacity magnetic protein A agarose beads, LOABeads PrtA, were used in the development of a new process for affinity purification of monoclonal antibodies (mAbs) from non‐clarified CHO cell broth using a pilot‐scale magnetic separator. The LOABeads had a maximum binding capacity of 65 mg/mL and an adsorption capacity of 25–42 mg IgG/mL bead in suspension for an IgG concentration of 1 to 8 g/L. Pilot‐scale separation was initially tested in a mAb capture step from 26 L clarified harvest. Small‐scale experiments showed that similar mAb adsorptions were obtained in cell broth containing 40 × 106 cells/mL as in clarified supernatant. Two pilot‐scale purification runs were then performed on non‐clarified cell broth from fed‐batch runs of 16 L, where a rapid mAb adsorption ≥96.6% was observed after 1 h. This process using 1 L of magnetic beads had an overall mAb yield of 86% and 16 times concentration factor. After this single protein A capture step, the mAb purity was similar to the one obtained by column chromatography, while the host cell protein content was very low, <10 ppm. Our results showed that this magnetic bead mAb purification process, using a dedicated pilot‐scale separation device, was a highly efficient single step, which directly connected the culture to the downstream process without cell clarification. Purification of mAb directly from non‐clarified cell broth without cell separation can provide significant savings in terms of resources, operation time, and equipment, compared to legacy procedure of cell separation followed by column chromatography step. © 2019 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2775, 2019.
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Affiliation(s)
- Nils A Brechmann
- AdBIOPRO, VINNOVA Competence Centre for Advanced BioProduction by Continuous Processing, Stockholm, Sweden.,Cell Technology Group (CETEG), Dept. of Industrial Biotechnology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Inst. of Technology, Stockholm, Sweden
| | | | - Kristofer Eriksson
- AdBIOPRO, VINNOVA Competence Centre for Advanced BioProduction by Continuous Processing, Stockholm, Sweden.,Lab-on-a-Bead AB, Uppsala, Sweden
| | - Sven Oscarsson
- Dept. of Organic Chemistry, Stockholm University, Stockholm, Sweden
| | - Jos Buijs
- Dept. of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Atefeh Shokri
- AdBIOPRO, VINNOVA Competence Centre for Advanced BioProduction by Continuous Processing, Stockholm, Sweden.,Cell Technology Group (CETEG), Dept. of Industrial Biotechnology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Inst. of Technology, Stockholm, Sweden
| | - Göran Hjälm
- AdBIOPRO, VINNOVA Competence Centre for Advanced BioProduction by Continuous Processing, Stockholm, Sweden.,Lab-on-a-Bead AB, Uppsala, Sweden
| | - Véronique Chotteau
- AdBIOPRO, VINNOVA Competence Centre for Advanced BioProduction by Continuous Processing, Stockholm, Sweden.,Cell Technology Group (CETEG), Dept. of Industrial Biotechnology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Inst. of Technology, Stockholm, Sweden
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5
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Saucedo NM, Gao Y, Pham T, Mulchandani A. Lectin- and Saccharide-Functionalized Nano-Chemiresistor Arrays for Detection and Identification of Pathogenic Bacteria Infection. BIOSENSORS 2018; 8:E63. [PMID: 29966294 PMCID: PMC6165015 DOI: 10.3390/bios8030063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 06/26/2018] [Accepted: 06/28/2018] [Indexed: 11/17/2022]
Abstract
Improvement upon, and expansion of, diagnostic tools for clinical infections have been increasing in recent years. The simplicity and rapidity of techniques are imperative for their adoption and widespread usage at point-of-care. The fabrication and evaluation of such a device is reported in this work. The use of a small bioreceptor array (based on lectin-carbohydrate binding) resulted in a unique response profile, which has the potential to be used for pathogen identification, as demonstrated by Principal Component Analysis (PCA). The performance of the chemiresistive device was tested with Escherichia coli K12, Enterococcus faecalis, Streptococcus mutans, and Salmonella typhi. The limits of detection, based on concanavalin A (conA) lectin as the bioreceptor, are 4.7 × 10³ cfu/mL, 25 cfu/mL, 7.4 × 10⁴ cfu/mL, and 6.3 × 10² cfu/mL. This shows that the detection of pathogenic bacteria is achieved with clinically relevant concentrations. Importantly, responses measured in spiked artificial saliva showed minimal matrix interference. Furthermore, the exploitation of the distinctive outer composition of the bacteria and selectivity of lectin-carbohydrate interactions allowed for the discrimination of bacterial infections from viral infections, which is a current and urgent need for diagnosing common clinical infections.
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Affiliation(s)
- Nuvia M Saucedo
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
- Department of Chemistry, Southern Adventist University, Collegedale, TN 37315, USA.
| | - Yingning Gao
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA.
| | - Tung Pham
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA.
| | - Ashok Mulchandani
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA.
- Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA.
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6
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Wang N, Wei X, Zheng AQ, Yang T, Chen ML, Wang JH. Dual Functional Core-Shell Fluorescent Ag 2S@Carbon Nanostructure for Selective Assay of E. coli O157:H7 and Bactericidal Treatment. ACS Sens 2017; 2:371-378. [PMID: 28723213 DOI: 10.1021/acssensors.6b00688] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A dual functional fluorescent core-shell Ag2S@Carbon nanostructure is prepared by a hydrothermally assisted multi-amino synthesis approach with folic acid (FA), polyethylenimine (PEI), and mannoses (Mans) as carbon and nitrogen sources (FA-PEI-Mans-Ag2S nanocomposite shortly as Ag2S@C). The nanostructure exhibits strong fluorescent emission at λex/λem = 340/450 nm with a quantum yield of 12.57 ± 0.52%. Ag2S@C is bound to E. coli O157:H7 via strong interaction with the Mans moiety in Ag2S@C with FimH proteins on the fimbriae tip in E. coli O157:H7. Fluorescence emission from Ag2S@C/E. coli conjugate is closely related to the content of E. coli O157:H7. Thus, a novel procedure for fluorescence assay of E. coli O157:H7 is developed, offering a detection limit of 330 cfu mL-1. Meanwhile, the Ag2S@C nanostructure exhibits excellent antibacterial performance against E. coli O157:H7. A 99.9% sterilization rate can be readily achieved for E. coli O157:H7 at a concentration of 106-107 cfu mL-1 with 3.3 or 10 μg mL-1 of Ag2S@C with an interaction time of 5 or 0.5 min, respectively.
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Affiliation(s)
- Ning Wang
- Research Center for Analytical
Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China, 110819
| | - Xing Wei
- Research Center for Analytical
Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China, 110819
| | - An-Qi Zheng
- Research Center for Analytical
Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China, 110819
| | - Ting Yang
- Research Center for Analytical
Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China, 110819
| | - Ming-Li Chen
- Research Center for Analytical
Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China, 110819
| | - Jian-Hua Wang
- Research Center for Analytical
Sciences, Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China, 110819
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7
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Antibody-free detection of infectious bacteria using quantum dots-based barcode assay. J Pharm Biomed Anal 2016; 134:325-332. [PMID: 27894780 DOI: 10.1016/j.jpba.2016.10.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 10/26/2016] [Accepted: 10/30/2016] [Indexed: 01/18/2023]
Abstract
Staphylococcus aureus, methicillin-resistant Staphylococcus aureus and Klebsiella pneumoniae are the most representative bacteria causing infectious diseases. Due to the increased application of antibiotics, the bacterial resistance is growing causing severe complications. Therefore, a sensitive determination of these pathogens is crucial for effective treatment. The aim of this study was to design an effective method for multiplex detection of Staphylococcus aureus, methicillin-resistant Staphylococcus aureus and Klebsiella pneumoniae taking advantage from properties of magnetic particles as well as fluorescent nanoparticles (quantum dots). The method was able to detect as low concentrations of bacteria as 102 CFU/mL using the bacteria-specific genes (fnbA, mecA and wcaG).
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8
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Sakudo A, Viswan A, Chou H, Sasaki T, Ikuta K, Nagatsu M. Capture of dengue viruses using antibody-integrated graphite-encapsulated magnetic beads produced using gas plasma technology. Mol Med Rep 2016; 14:697-704. [PMID: 27221214 PMCID: PMC4918612 DOI: 10.3892/mmr.2016.5330] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 05/09/2016] [Indexed: 11/25/2022] Open
Abstract
Despite significant advances in medicine, global health is threatened by emerging infectious diseases caused by a number of viruses. Dengue virus (DENV) is a mosquito-borne virus, which can be transmitted to humans via mosquito vectors. Previously, the Ministry of Health, Labour and Welfare in Japan reported the country's first domestically acquired case of dengue fever for almost 70 years. To address this issue, it is important to develop novel technologies for the sensitive detection of DENV. The present study reported on the development of plasma-functionalized, graphite-encapsulated magnetic nanoparticles (GrMNPs) conjugated with anti-DENV antibody for DENV capture. Radiofrequency wave-excited inductively-coupled Ar and ammonia gas plasmas were used to introduce amino groups onto the surface of the GrMNPs. The GrMNPs were then conjugated with an antibody against DENV, and the antibody-integrated magnetic beads were assessed for their ability to capture DENV. Beads incubated in a cell culture medium of DENV-infected mosquito cells were separated from the supernatant by applying a magnetic field and were then washed. The adsorption of DENV serotypes 1–4 onto the beads was confirmed using reverse transcription-polymerase chain reaction, which detected the presence of DENV genomic RNA on the GrMNPs. The methodology described in the present study, which employed the plasma-functionalization of GrMNPs to enable antibody-integration, represents a significant improvement in the detection of DENV.
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Affiliation(s)
- Akikazu Sakudo
- Laboratory of Biometabolic Chemistry, School of Health Sciences, Faculty of Medicine, University of the Ryukyus, Nishihara, Okinawa 903‑0215, Japan
| | - Anchu Viswan
- Department of Nanovision Technology, Graduate School of Science and Technology, Shizuoka University, Naka‑Ku, Hamamatsu 432‑8561, Japan
| | - Han Chou
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Shizuoka University, Naka‑Ku, Hamamatsu 432‑8561, Japan
| | - Tadahiro Sasaki
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Osaka 565‑0871, Japan
| | - Kazuyoshi Ikuta
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Osaka 565‑0871, Japan
| | - Masaaki Nagatsu
- Department of Nanovision Technology, Graduate School of Science and Technology, Shizuoka University, Naka‑Ku, Hamamatsu 432‑8561, Japan
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9
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Immunomagnetic separation of Salmonella with tailored magnetic micro and nanocarriers. A comparative study. Talanta 2015; 143:198-204. [DOI: 10.1016/j.talanta.2015.05.035] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 05/11/2015] [Accepted: 05/15/2015] [Indexed: 11/19/2022]
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10
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Kavaz Yüksel A, Yüksel M. Determination of Certain Microbiological Quality Characteristics of Ice Cream, Detection of S
almonella
by Conventional and Immunomagnetic Separation Methods and Antibiotic Susceptibility of S
almonella
spp. Isolates. J Food Saf 2015. [DOI: 10.1111/jfs.12186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arzu Kavaz Yüksel
- Department of Food Engineering; Engineering Faculty; Adıyaman University; Adıyaman 02040 Turkey
| | - Mehmet Yüksel
- Department of Food Engineering; Faculty of Agricultural; Atatürk University; Erzurum Turkey
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11
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Fields C, Li P, O'Mahony JJ, Lee GU. Advances in affinity ligand-functionalized nanomaterials for biomagnetic separation. Biotechnol Bioeng 2015; 113:11-25. [DOI: 10.1002/bit.25665] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/21/2015] [Accepted: 05/24/2015] [Indexed: 12/31/2022]
Affiliation(s)
- Conor Fields
- School of Chemistry and Chemical Biology; University College Dublin, Belfield, Dublin 4; Ireland
| | - Peng Li
- School of Chemistry and Chemical Biology; University College Dublin, Belfield, Dublin 4; Ireland
| | - James J. O'Mahony
- School of Chemistry and Chemical Biology; University College Dublin, Belfield, Dublin 4; Ireland
| | - Gil U. Lee
- School of Chemistry and Chemical Biology; University College Dublin, Belfield, Dublin 4; Ireland
- Conway Institute for Biomolecular and Biomedical Sciences; University College Dublin, Belfield, Dublin 4; Ireland
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12
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Synthesis of poly(glycidyl methacrylate)–copper nanocomposite beads by in-situ suspension polymerization and deposition method – A comparative study. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.04.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Behra M, Azzouz N, Schmidt S, Volodkin DV, Mosca S, Chanana M, Seeberger PH, Hartmann L. Magnetic Porous Sugar-Functionalized PEG Microgels for Efficient Isolation and Removal of Bacteria from Solution. Biomacromolecules 2013; 14:1927-35. [DOI: 10.1021/bm400301v] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Muriel Behra
- Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1,
14476 Potsdam-Golm, Germany
- Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Nahid Azzouz
- Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1,
14476 Potsdam-Golm, Germany
- Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Stephan Schmidt
- Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1,
14476 Potsdam-Golm, Germany
- Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Dmitry V. Volodkin
- Fraunhofer Institute for Biomedical Engineering IBMT, Am Mühlenberg
13, 14476 Potsdam-Golm, Germany
| | - Simone Mosca
- Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1,
14476 Potsdam-Golm, Germany
- Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Munish Chanana
- Institute for Building
Materials (IfB), ETH Zurich, Schafmattstr. 6 (HIF), 8093 Zurich, Switzerland
| | - Peter H. Seeberger
- Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1,
14476 Potsdam-Golm, Germany
- Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Laura Hartmann
- Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1,
14476 Potsdam-Golm, Germany
- Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
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14
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Sunna A, Chi F, Bergquist PL. Efficient capture of pathogens with a zeolite matrix. Parasitol Res 2013; 112:2441-52. [DOI: 10.1007/s00436-013-3405-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 03/15/2013] [Indexed: 10/27/2022]
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15
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Ladj R, Bitar A, Eissa M, Mugnier Y, Le Dantec R, Fessi H, Elaissari A. Individual inorganic nanoparticles: preparation, functionalization and in vitro biomedical diagnostic applications. J Mater Chem B 2013; 1:1381-1396. [PMID: 32260777 DOI: 10.1039/c2tb00301e] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Inorganic nanoparticles have become the focus of modern materials science due to their potential technological importance, particularly in bionanotechnology, which stems from their unique physical properties including size-dependent optical, magnetic, electronic, and catalytic properties. The present article provides an overview on the currently used individual inorganic nanoparticles for in vitro biomedical domains. These inorganic nanoparticles include iron oxides, gold, silver, silica, quantum dots (QDs) and second harmonic generation (SHG) particles. For each of these interesting nanoparticles, the main issues starting from preparation up to bio-related applications are presented.
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Affiliation(s)
- R Ladj
- University of Lyon, F-69622 Lyon, France, University of Lyon-1, Villeurbanne, LAGEP, UMR 5007, CPE, 43 bd 11 November 1918, F-69622 Villeurbanne, France.
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16
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Lim JK, Chieh DCJ, Jalak SA, Toh PY, Yasin NHM, Ng BW, Ahmad AL. Rapid magnetophoretic separation of microalgae. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:1683-1692. [PMID: 22438107 DOI: 10.1002/smll.201102400] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 01/09/2012] [Indexed: 05/31/2023]
Abstract
Magnetic collection of the microalgae Chlorella sp. from culture media facilitated by low-gradient magnetophoretic separation is achieved in real time. A removal efficiency as high as 99% is accomplished by binding of iron oxide nanoparticles (NPs) to microalgal cells in the presence of the cationic polyelectrolyte poly(diallyldimethylammonium chloride) (PDDA) as a binder and subsequently subjecting the mixture to a NdFeB permanent magnet with surface magnetic field ≈6000 G and magnetic field gradient <80 T m(-1) . Surface functionalization of magnetic NPs with PDDA before exposure to Chlorella sp. is proven to be more effective in promoting higher magnetophoretic removal efficiency than the conventional procedure, in which premixing of microalgal cells with binder is carried out before the addition of NPs. Rodlike NPs are a superior candidate for enhancing the magnetophoretic separation compared to spherical NPs due to their stable magnetic moment that originates from shape anisotropy and the tendency to form large NP aggregates. Cell chaining is observed for nanorod-tagged Chlorella sp. which eventually fosters the formation of elongated cell clusters.
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Affiliation(s)
- Jit Kang Lim
- School of Chemical Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia.
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17
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Hartmann M, Betz P, Sun Y, Gorb SN, Lindhorst TK, Krueger A. Saccharide-Modified Nanodiamond Conjugates for the Efficient Detection and Removal of Pathogenic Bacteria. Chemistry 2012; 18:6485-92. [DOI: 10.1002/chem.201104069] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Indexed: 11/11/2022]
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18
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CHE YIHUA, YANG ZHONGPING, LI YANBIN, PAUL DAVID, SLAVIK MICHAEL. RAPID DETECTION OF SALMONELLA TYPHIMURIUM USING AN IMMUNOELECTROCHEMICAL METHOD COUPLED WITH IMMUNOMAGNETIC SEPARATION. ACTA ACUST UNITED AC 2011. [DOI: 10.1111/j.1745-4581.1999.tb00371.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zuo H, Xie Z, Ding X, Zhang W, Yang J, Fan X, Poms R, Pei X. A novel magnetic capture-multiplex PCR assay for the simultaneous detection of three foodborne pathogens. QUALITY ASSURANCE AND SAFETY OF CROPS & FOODS 2011. [DOI: 10.1111/j.1757-837x.2011.00113.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haojiang Zuo
- Department of Medical Technology; West China School of Public Health; Sichuan University; Chengdu; Sichuan; China
| | - Zhimei Xie
- Department of Medical Technology; West China School of Public Health; Sichuan University; Chengdu; Sichuan; China
| | - Xiaobei Ding
- Department of Medical Technology; West China School of Public Health; Sichuan University; Chengdu; Sichuan; China
| | - Weiwei Zhang
- Department of Medical Technology; West China School of Public Health; Sichuan University; Chengdu; Sichuan; China
| | - Jingyan Yang
- Department of Medical Technology; West China School of Public Health; Sichuan University; Chengdu; Sichuan; China
| | - Xuejun Fan
- Sichuan Entry-Exit Inspection and Quarantine Bureau; Chengdu; Sichuan; China
| | | | - Xiaofang Pei
- Department of Medical Technology; West China School of Public Health; Sichuan University; Chengdu; Sichuan; China
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Miranda OR, Li X, Garcia-Gonzalez L, Zhu ZJ, Yan B, Bunz UHF, Rotello VM. Colorimetric bacteria sensing using a supramolecular enzyme-nanoparticle biosensor. J Am Chem Soc 2011; 133:9650-3. [PMID: 21627131 PMCID: PMC3120917 DOI: 10.1021/ja2021729] [Citation(s) in RCA: 221] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rapid and sensitive detection of pathogens is a key requirement for both environmental and clinical settings. We report here a colorimetric enzyme-nanoparticle conjugate system for detection of microbial contamination. In this approach, cationic gold nanoparticles (NPs) featuring quaternary amine headgroups are electrostatically bound to an enzyme [β-galactosidase (β-Gal)], inhibiting enzyme activity. Analyte bacteria bind to the NP, which releases the β-Gal and restores its activity, providing an enzyme-amplified colorimetric readout of the binding event. Using this strategy, we have been able to quantify bacteria at concentrations of 1 × 10(2) bacteria/mL in solution and 1 × 10(4) bacteria/mL in a field-friendly test strip format.
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Affiliation(s)
- Oscar R. Miranda
- Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Xiaoning Li
- Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Limary Garcia-Gonzalez
- Department of Chemistry, University of Puerto Rico, Rio Piedras Campus, San Juan, PR 00931
| | - Zheng-Jiang Zhu
- Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Bo Yan
- Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Uwe H. F. Bunz
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, Massachusetts 01003
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Philippova O, Barabanova A, Molchanov V, Khokhlov A. Magnetic polymer beads: Recent trends and developments in synthetic design and applications. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2010.11.006] [Citation(s) in RCA: 225] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Khorshidi HR, Eisazadeh H, Khesali AR. Preparation and characterization of polyaniline containing Fe3O4 nanoparticles using sodium dodecylbenzenesulfonate as a surfactant. HIGH PERFORM POLYM 2011. [DOI: 10.1177/0954008310382310] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Magnetic and conducting polyaniline (PAn)/Fe3O4 nanoparticles were prepared in the aqueous solution by using sodium dodecylbenzenesulfonate (DBSNa) as a surfactant. The chemical structure and surface morphology of PAn/Fe3O4 nanoparticles were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope. The conductivity of the composites was measured as a function of the Fe 3O4 content of the reaction solution. The magnetic properties of the resulting composites showed superparamagnetic behavior, such as saturated magnetization ( Ms = 1.8 emu g- 1), remnant magnetization ( Mr = 0), and coercive force ( Hc = 0). The nanometer size (about 14 nm) Fe3O4 in the composites causes of the superparamagnetic behavior of the product.
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Affiliation(s)
| | - Hossein Eisazadeh
- Faculty of Chemical Engineering, Babol University of Technology, Babol, Iran,
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23
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Saunders NA. Application of nanomaterials to arrays for infectious disease diagnosis. Nanomedicine (Lond) 2011; 6:271-80. [DOI: 10.2217/nnm.10.161] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
As our understanding of infectious agents increases it has become possible to identify the biological components of individual strains with greater accuracy. This ability is aiding clinical microbiologists to control both existing and emerging infectious disease problems. Microarray technologies are playing an increasingly important role in supplying relevant test data. Control of the nanoscale structures of the materials used in arrays, including the supports, reagents and analytes, is now essential. New techniques for the manufacture of nanostructured supports is now allowing rapid advances in the fields of multianalyte testing and high-volume DNA sequencing.
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Affiliation(s)
- Nicholas A Saunders
- Health Protection Agency, Centre for Infections, 61 Colindale Avenue, London NW9 5HT, UK
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24
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Sartory D, Watkins J. Conventional culture for water quality assessment: is there a future? J Appl Microbiol 2010; 85 Suppl 1:225S-233S. [DOI: 10.1111/j.1365-2672.1998.tb05302.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Hristov J. Magnetic field assisted fluidization – a unified approach. Part 8. Mass transfer: magnetically assisted bioprocesses. REV CHEM ENG 2010. [DOI: 10.1515/revce.2010.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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26
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Lavilla M, De Luis R, Pérez MD, Calvo M, Sánchez L. Selection of high affine peptide ligands for detection of Clostridium Tyrobutyricum spores. J Microbiol Methods 2009; 79:214-9. [DOI: 10.1016/j.mimet.2009.09.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Revised: 09/04/2009] [Accepted: 09/08/2009] [Indexed: 10/20/2022]
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27
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Schemberg JÃ, Grodrian A, Römer R, Gastrock G, Lemke K. Online optical detection of food contaminants in microdroplets. Eng Life Sci 2009. [DOI: 10.1002/elsc.200800127] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Abstract
Alginate is a polysaccharide that is a block polymer consisting of block units of guluronic acid and mannuronic acid. It shows inherent biological affinity for a variety of enzymes such as pectinase, lipase, phospholipase D, a and ss amylases and glucoamylase. Taking advantage of its precipitation with Ca2+ and the above-mentioned property, alginate has been used for purification of these enzymes by affinity precipitation, aqueous two phase separation, macroaffinity ligand facilitated three phase partitioning, immobilized metal affinity chromatography and expanded bed affinity chromatography. Thus, this versatile marine resource has tremendous potential in bioseparation of proteins.
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Affiliation(s)
- Sulakshana Jain
- Chemistry Department, Indian Institute of Technology, New Delhi, India
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29
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Käppler T, Cerff M, Ottow K, Hobley T, Posten C. In situ magnetic separation for extracellular protein production. Biotechnol Bioeng 2009; 102:535-45. [DOI: 10.1002/bit.22064] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
AbstractBoth synthetic and biologically produced magnetic nano- and microparticles exhibit several types of responses to external magnetic field which have been already employed in various areas of biosciences, biotechnology, medicine, environmental technology, etc. This short review shows selected important biotechnological applications of magnetic particles, and the biological processes leading to biogenic magnetic particles formation.
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31
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Rotariu O, Iacob G, Strachan NJC, Chiriac H. Simulating the Embolization of Blood Vessels Using Magnetic Microparticles and Acupuncture Needle in a Magnetic Field. Biotechnol Prog 2008; 20:299-305. [PMID: 14763856 DOI: 10.1021/bp034146o] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Computer models were developed to simulate the capture and subsequent deposition of magnetic microparticles (MMPs) in a blood vessel adjacent to a ferromagnetic wire (e.g., acupuncture needle) magnetized by a uniform external magnetic field. Process parameter conditions were obtained to enable optimal capture of MMPs into the deposit. It was found that the maximum capture distance of the MMPs was within 0.5-2.0 mm when the particles were superparamagnetic and had large size (>1.0 microm) and relative large flow rates (2.5-5.0 cm/s) as in a healthy artery. It was also found that the deposits were asymmetrical and that their size was between 1.0 and 2.0 mm. For the case of lower flow rates as can be found in a tumor (<1.0 mm/s) and using small magnetite particles (0.25-2.0 microm) the maximum capture distance was larger, ranging between approximately 0.5 and 6.4 mm, depending on the blood flow rate, the radius of wire, and particle clustering. The range of embolization (deposition) in this later case was between 0.5 and 5.9 mm. The potential of this technique to generate MMPs deposits to embolize blood vessels inhibiting the blood supply and thus facilitating necrosis of tumors located deep within the patient (3-7 cm) is discussed.
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Affiliation(s)
- Ovidiu Rotariu
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 3UU, Scotland, UK.
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32
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Dalgaard P, Mejlholm O, Huss H. Conductance method for quantitative determination ofPhotobacterium phosphoreumin fish products. ACTA ACUST UNITED AC 2008. [DOI: 10.1111/j.1365-2672.1996.tb03282.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Lavilla M, de Luis R, Conesa C, Pérez MD, Calvo M, Sánchez L. Production of polyclonal antibodies against spores ofClostridium tyrobutyricum, a contaminant affecting the quality of cheese: characterisation of the immunodominant protein. FOOD AGR IMMUNOL 2008. [DOI: 10.1080/09540100801956653] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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34
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Biosensors and bio-based methods for the separation and detection of foodborne pathogens. ADVANCES IN FOOD AND NUTRITION RESEARCH 2008; 54:1-44. [PMID: 18291303 DOI: 10.1016/s1043-4526(07)00001-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The safety of our food supply is always a major concern to consumers, food producers, and regulatory agencies. A safer food supply improves consumer confidence and brings economic stability. The safety of foods from farm-to-fork through the supply chain continuum must be established to protect consumers from debilitating, sometimes fatal episodes of pathogen outbreaks. The implementation of preventive strategies like hazard analysis critical control points (HACCP) assures safety but its full utility will not be realized unless supportive tools are fully developed. Rapid, sensitive, and accurate detection methods are such essential tools that, when integrated with HACCP, will improve safety of products. Traditional microbiological methods are powerful, error-proof, and dependable but these lengthy, cumbersome methods are often ineffective because they are not compatible with the speed at which the products are manufactured and the short shelf life of products. Automation in detection methods is highly desirable, but is not achievable with traditional methods. Therefore, biosensor-based tools offer the most promising solutions and address some of the modern-day needs for fast and sensitive detection of pathogens in real time or near real time. The application of several biosensor tools belonging to the categories of optical, electrochemical, and mass-based tools for detection of foodborne pathogens is reviewed in this chapter. Ironically, geometric growth in biosensor technology is fueled by the imminent threat of bioterrorism through food, water, and air and by the funding through various governmental agencies.
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Salehi TZ, Tadjbakhsh H, Atashparvar N, Nadalian MG, Mahzounieh MR. Detection and Identification of Salmonella Typhimurium in Bovine Diarrhoeic Fecal Samples by Immunomagnetic Separation and Multiplex PCR Assay. Zoonoses Public Health 2007; 54:231-6. [PMID: 17803511 DOI: 10.1111/j.1863-2378.2007.01061.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aim of this study was to use the immunomagnetic separation (IMS) test plus a multiplex polymerase chain reaction (m-PCR) assay to detect Salmonella at genus level and also for the identification of Salmonella enterica serovar Typhimurium in bovine diarrhoeic fecal samples. In all, 400 bovine diarrhoeic fecal specimens were examined by conventional bacterial culture, IMS, and m-PCR. For m-PCR assay, four set primers were selected: 139-141, specific for inv-A gene of Salmonella spp and the RfbJ, FliC and FljB, specific for the rfbJ, FliC and fljB genes of Salmonella Typhimurium or other Salmonella serovars with similar antigenic properties. Thirty-three (8.25%) out of the 400 fecal samples were culture positive for Salmonella serovars. Of these, 66.7% (22 of 33) were Salmonella enterica serovar Typhimurium, and 9.1% (three of 33) were serovar Dublin. In the IMS + m-PCR, four amplified product (663, 526, 284 and 183 bp) were found in all specimens that had serovar Typhimurium (4,5,12:i:1,2), they corresponded, respectively, to the rfbJ, fljB, inv-A and Flic genes of this serovar. In serovar Dublin (1,9,12:g,p:-), Georgia (6,7:b:e,n,z(15)) and, Enteritidis (1,9,12;g,m:-) only one PCR product (284 bp) was amplified from the inv-A gene. In serovars Augustenborg (6,7:i:1,2) and Lindenburg (6,8:i:1,2) three positive bands (526, 284 and 183 bp) were amplified corresponding to the fljB, inv-A and Flic genes, respectively. In serovar Virchow (6,7:r:1,2) two amplified products (284 and 526 bp) from the inv-A and FliC genes were observed. In serovar Gloucster (1,4,12(27):i:1,w) three fragments (183, 284 and 663) from the FliC, inv-A and, rfbJ genes respectively, were observed. In the positive control as expected, four PCR products were amplified corresponding to the FliC, inv-A, fljB and rfbJ genes, respectively. In conclusion, the results of this study showed that detection of Salmonella at genus level with universal ST139-141 primers and identification of Salmonella Typhimurium by using specific primers of O4, H(2):1, 2 and H(1) antigens can potentially permit to more readily evaluate fecal and other types of samples for the presence of these organisms. Compared to bacteriological culture the combination of IMS and m-PCR resulted a faster method for the detection and identification of Salmonella at genus and serovar level by using of universal and specific primers.
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Affiliation(s)
- T Zahraei Salehi
- Department of Microbiology, Faculty of Veterinary Medicine, University of Tehran, PO Box 14155-6453, Tehran, Iran
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Sethi S, Gore MT, Sethi KK. Increased sensitivity of a direct fluorescent antibody test for Legionella pneumophila in bronchoalveolar lavage samples by immunomagnetic separation based on BioMags. J Microbiol Methods 2007; 70:328-35. [PMID: 17574285 DOI: 10.1016/j.mimet.2007.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 05/03/2007] [Accepted: 05/10/2007] [Indexed: 11/24/2022]
Abstract
In the present study, immunomagnetic separation of Legionella pneumophila from mock bronchoalveolar lavage (BAL) fluid samples, which were artificially spiked with L. pneumophila, and culture positive patient BAL fluid samples, was achieved using BioMags (superparamagnetic particles) loaded with purified rabbit immunoglobulin G specific for L. pneumophila. Bacteria binding onto BioMag-immunomatrix were directly stained with a L. pneumophila species-specific DFA reagent and examined under a fluorescence microscope. BioMag-based immunomagnetic separation (BIMS) followed by DFA staining (BIMS-DFA) could correctly identify all the 20 (100%) BAL samples which were spiked with low numbers (2x10(2) CFU) of L. pneumophila. Cultures could be recovered from 15 (75%) of these 20 spiked BAL samples, 5 (25%) of the samples failed to yield positive cultures. Both culture and BIMS-DFA methods showed 100% positive results when spiked BAL samples containing high bacterial load (10(4) CFU) were tested. The findings with true patient culture positive BAL specimens which were examined retrospectively indicated that BIMS-DFA is significantly more sensitive for detecting L. pneumophila than conventional cytospin method of DFA staining (cytospin-DFA). Out of the 25 culture positive BAL specimens tested, 7 (28%) proved negative by cytospin-DFA whereas BIMS-DFA correctly detected all the 25 (100%) specimens. It is suggested that the BIMS-DFA procedure increases the sensitivity of DFA testing for L. pneumophila in large volume samples such as BAL fluids.
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Affiliation(s)
- Shneh Sethi
- Institute of Medical Microbiology and Hygiene, University of Saarland Hospital, Kirrberger Strasse, Building No.43, 66421 Homburg/Saar, Germany.
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Horák D, Babic M, Macková H, Benes MJ. Preparation and properties of magnetic nano- and microsized particles for biological and environmental separations. J Sep Sci 2007; 30:1751-72. [PMID: 17623453 DOI: 10.1002/jssc.200700088] [Citation(s) in RCA: 295] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The paper presents a critical overview on magnetic nanoparticles and microspheres used as separation media in different fields of chemistry, biochemistry, biology, and environment protection. The preparation of most widely used magnetic iron oxides in appropriate form, their coating or encapsulation in polymer microspheres, and functionalization is discussed in the first part. In the second part, new developments in the main application areas of magnetic composite particles for separation and catalytical purposes are briefly described. They cover separations and isolations of toxic inorganic and organic ions, proteins, and other biopolymers, cells, and microorganisms. Only selected number of relevant papers could be included due to the restricted extent of the review.
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Affiliation(s)
- Daniel Horák
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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Wang L, Li Y, Mustaphai A. Rapid and simultaneous quantitation of Escherichia coli 0157:H7, Salmonella, and Shigella in ground beef by multiplex real-time PCR and immunomagnetic separation. J Food Prot 2007; 70:1366-72. [PMID: 17612065 DOI: 10.4315/0362-028x-70.6.1366] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this study was to establish a multiplex real-time PCR for the simultaneous quantitation of Escherichia coli O157:H7, Salmonella, and Shigella. Genomic DNA for the real-time PCR was extracted by the boiling method. Three sets of primers and corresponding TaqMan probes were designed to target these three pathogenic bacteria. Multiplex real-time PCR was performed with TaqMan Universal PCR Master Mix in an ABI Prism 7700 Sequence Detection System. Final standard curves were calculated for each pathogen by plotting the threshold cycle value against the bacterial number (log CFU per milliliter) via linear regression. With optimized conditions, the quantitative detection range of the real-time multiplex PCR for pure cultures was 10(2) to 10(9) CFU/ml for E. coli O157:H7, 10(3) to 10(9) CFU/ml for Salmonella, and 10(1) to 10(8) CFU/ml for Shigella. When the established multiplex real-time PCR system was applied to artificially contaminated ground beef, the detection limit was 10(5) CFU/g for E. coli O157:H7, 10(3) CFU/g for Salmonella, and 10(4) CFU/g for Shigella. Immunomagnetic separation (IMS) was further used to separate E. coli O157:H7 and Salmonella from the beef samples. With the additional use of IMS, the detection limit was 10(3) CFU/g for both pathogens. Results from this study showed that TaqMan real-time PCR, combined with IMS, is potentially an effective method for the rapid and reliable quantitation of E. coli 0157:H7, Salmonella, and Shigella in food.
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Affiliation(s)
- Luxin Wang
- Food Science Program, Division of Food Systems and Bioengineering, 256 WCS Wing, Eckles Hall, University of Missouri, Columbia, Missouri 65211, USA
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Zhang G, Qu J, Liu H, Cooper AT, Wu R. CuFe2O4/activated carbon composite: a novel magnetic adsorbent for the removal of acid orange II and catalytic regeneration. CHEMOSPHERE 2007; 68:1058-66. [PMID: 17397903 DOI: 10.1016/j.chemosphere.2007.01.081] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2006] [Revised: 01/24/2007] [Accepted: 01/31/2007] [Indexed: 05/14/2023]
Abstract
CuFe2O4/activated carbon magnetic adsorbents, which combined the adsorption features of activated carbon with the magnetic and the excellent catalytic properties of powdered CuFe2O4, were developed using a simple chemical coprecipitation procedure. The prepared magnetic composites can be used to adsorb acid orange II (AO7) in water and subsequently, easily be separated from the medium by a magnetic technique. CuFe2O4/activated carbon magnetic adsorbents with mass ratio of 1:1, 1:1.5 and 1:2 were prepared. Magnetization measurements, BET surface area measurements, powder XRD and SEM were used to characterize the prepared adsorbents. The results indicate that the magnetic phase present is spinel copper ferrite and the presence of CuFe2O4 did not significantly affect the surface area and pore structure of the activated carbon. The adsorption kinetics and adsorption isotherm of acid orange II (AO7) onto the composites at pH 5.2 also showed that the presence of CuFe2O4 did not affect the adsorption capacity of the activated carbon. The thermal decomposition of AO7 adsorbed on the activated carbon and the composite was investigated by in situ FTIR, respectively. The results suggest that the composite has much higher catalytic activity than that of activated carbon, attributed to the presence of CuFe2O4. The variation of the adsorption capacity of the composites after several adsorption-regeneration cycles has also been studied.
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Affiliation(s)
- Gaosheng Zhang
- State key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Notzon A, Helmuth R, Bauer J. Evaluation of an immunomagnetic separation-real-time PCR assay for the rapid detection of Salmonella in meat. J Food Prot 2006; 69:2896-901. [PMID: 17186656 DOI: 10.4315/0362-028x-69.12.2896] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aim of this study was the comparison of an immunomagnetic separation (IMS)-real-time PCR assay for the detection of Salmonella with the cultural reference method according to and 35 of the German Law on Food and Commodities (LMBG, L 00.00.20:1998). The IMS-real-time PCR assay includes a nonselective preenrichment step, an IMS, DNA extraction, as well as DNA purification followed by hybridization probe-based real-time PCR analysis. An accurate comparability was achieved, because both methods analyzed the same preenrichment. The evaluation was carried out using both artificially and naturally contaminated meat samples. The IMS-real-time PCR assay provides a result after 12 to 13 h. Compared with the reference method and regarding artificially contaminated meat samples, the IMS-real-time PCR assay achieved a specificity of 80% (false-positive rate of 20%) and a sensitivity of 100% (false-negative rate of 0%). The relative accuracy was 94%. The detection limit of both methods was 10 CFU/25 g. The concordance index kappa, which defines the statistical accordance, was 0.85 and indicated the agreement of both methods on statistical criteria. Compared to the reference method and analyzing naturally contaminated meat samples (n = 491), the IMS-real-time PCR assay showed a specificity of 99.3% (false-positive rate of 0.7%) and a sensitivity of 83.7% (false-negative rate of 16.3%). The relative accuracy was 98%. The concordance index kappa had a value of 0.87 and highlighted the statistical agreement of both methods. In conclusion, the IMS-real-time PCR assay is suitable as specific, sensitive, and rapid screening method for the detection of Salmonella from meat.
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Affiliation(s)
- Angelika Notzon
- Technische Universität München, Centre of Life and Food Science, Department of Animal Sciences, Institute of Animal Hygiene, Weihenstephaner Berg 3, D-85354 Freising-Weihenstephan, Germany
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Jha AK, Bose A, Downey JP. Removal of As(V) and Cr(VI) Ions from Aqueous Solution using a Continuous, Hybrid Field‐Gradient Magnetic Separation Device. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600915007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Veyret R, Elaissari A, Marianneau P, Sall AA, Delair T. Magnetic colloids for the generic capture of viruses. Anal Biochem 2005; 346:59-68. [PMID: 16157288 DOI: 10.1016/j.ab.2005.07.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2005] [Revised: 07/19/2005] [Accepted: 07/25/2005] [Indexed: 10/25/2022]
Abstract
In molecular biology or in the diagnostic field, a strong interest has been devoted to the use of magnetic nanoparticles as an efficient tool for a fast and easy biomolecule extraction. Various methods allow the synthesis of numerous types of magnetic particles, but very few of them can be adapted to biological protocols. For biological tests based on the final detection of nucleic acids, the major difficulties in the choice of these magnetic beads are their fast magnetic separation, requiring a high magnetic oxide content and overall a good compatibility with enzymes used for nucleic acid amplification. In this study, magnetic colloids were obtained from oil in water (o/w) magnetic emulsion by a two-step polymer immobilization procedure. First, a polycation, poly(ethyleneimine), was adsorbed to ensure charge inversion of the emulsion droplets. Then poly(maleic anhydride-co-methyl vinyl ether) was either chemically grafted or adsorbed if under its hydrolyzed form. The obtained colloids were characterized in terms of colloidal stability, surface charge density, and morphology and were evaluated in a reverse transcription-PCR (RT-PCR) inhibition test. Selected colloids were used for the nonspecific capture of viruses, with RT-PCR being used as a means of detection. Particle size and charge studies allowed us to follow each step of their synthesis, showing the relevance of these methods. The prepared magnetic particles exhibit a good RT-PCR compatibility when used in the range of 5-40 microg in the 50 microl amplification mix. Finally, virus capture tests revealed a capture efficiency of 90% with an average detection sensitivity of 10(3)pfu/ml.
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Affiliation(s)
- Raphael Veyret
- CNRS-bioMérieux, ENS de Lyon, 46 allée d'talie, 69364 Lyon, France
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45
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Boschke E, Steingroewer J, Bley T. Einsatz der biomagnetischen Separation zur mikrobiologischen Qualitätskontrolle von Lebensmitteln. CHEM-ING-TECH 2005. [DOI: 10.1002/cite.200500048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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46
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Delibato E, Bancone M, Volpe G, De Medici D, Moscone D, Palleschi G. Development and Comparative Evaluation of Different Screening Methods for Detection ofStaphylococcus aureus. ANAL LETT 2005. [DOI: 10.1081/al-200065797] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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47
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Steingroewer J, Knaus H, Bley T, Boschke E. A Rapid Method for the Pre-Enrichment and Detection ofSalmonella Typhimurium by Immunomagnetic Separation and Subsequent Fluorescence Microscopical Techniques. Eng Life Sci 2005. [DOI: 10.1002/elsc.200420072] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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48
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Affiliation(s)
- Mark M Richter
- Department of Chemistry, Southwest Missouri State University, Springfield, Missouri 65804-0089, USA.
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49
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Mercanoglu B, Griffiths MW. Combination of immunomagnetic separation with real-time PCR for rapid detection of Salmonella in milk, ground beef, and alfalfa sprouts. J Food Prot 2005; 68:557-61. [PMID: 15771182 DOI: 10.4315/0362-028x-68.3.557] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A rapid, specific, and sensitive method for detecting Salmonella spp. in pasteurized milk, ground beef, and alfalfa sprouts was developed. The method combined immunomagnetic separation with a real-time PCR assay based on the double-stranded DNA binding dye SYBR Green I. The primers used produced a product with a melting temperature of 87+/-0.5 degrees C during the PCR assay by amplifying a 284-bp sequence from the invasive gene (invA) of Salmonella. The method was successful in detecting 20 Salmonella strains, but the expected PCR product was not formed by any of 11 other bacterial strains. To test this combined method for the monitoring of Salmonella, Salmonella enterica serotype Newport was inoculated into 52 samples each of pasteurized milk, ground beef, and alfalfa sprouts. Following a 10-h nonselective enrichment step in buffered peptone water, cells were removed by immunomagnetic separation and DNA extracted using the High Pure PCR template preparation kit. The DNA produced was used as a template in the real-time PCR assay. When spiked pasteurized milk, ground beef, and alfalfa sprout samples were analyzed by this protocol, an initial inoculum of 1 CFU/ml, 25 CFU/25 g, and 1.5 CFU/25 g, respectively, was detectable within 13 h. These results indicate that the combination of immunomagnetic separation and real-time PCR assay was a highly specific and sensitive method for the rapid detection of Salmonella.
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Affiliation(s)
- Birce Mercanoglu
- Hacettepe University, Faculty of Engineering, Food Engineering Department, Beytepe, Ankara, Turkey
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50
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WIJEY C, CRAWFORD C, TU SI, PAOLI G. EFFECT OF BACTERIAL PROTEIN EXTRACTION REAGENT COMBINED WITH SODIUM AZIDE ON THE DETECTION OF ESCHERICHIA COLI O157:H7 USING IMMUNOMAGNETIC-ELECTROCHEMILUMINESCENCE. ACTA ACUST UNITED AC 2004. [DOI: 10.1111/j.1745-4581.2004.tb00054.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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