Abstract
We report on the design of superparamagnetic nanoparticles capable of selectively isolating targeted bacteria (Legionella pneumophila, serogroup 1) from aqueous solutions. The surface of magnetite nanoparticles (NP) was functionalized with a heterobifunctional poly(ethylene glycol) ligand containing reactive groups for covalent coupling of polyclonal antibodies against L. pneumophila. These bioconjugates were used to label and magnetically isolate L. pneumophila. Flow cytometry revealed high separation and efficiency in this regard. The strain specificity and efficiency of the magnetic NP was tested with recombinant strains of E. coli (expressing the red fluorescent protein) and L. pneumophila (expressing the green fluorescent protein). The detection limit of the method (by flow cytometry) is 104 cells∙mL-1. The results indicate that the new multifunctional NPs are capable of selectively attracting pathogens from a complex mixture and with high efficiency. This, conceivably, paves the way to pre-concentration protocols for numerous other pathogens.
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Lartigue L, Innocenti C, Kalaivani T, Awwad A, Sanchez Duque MDM, Guari Y, Larionova J, Guérin C, Montero JLG, Barragan-Montero V, Arosio P, Lascialfari A, Gatteschi D, Sangregorio C (2011) Water-dispersible sugar-coated iron oxide nanoparticles. an evaluation of their relaxometric and magnetic hyperthermia properties. J Am Chem Soc 133:10459
Larson TA, Bankson J, Aaron J, Sokolov K (2007) Hybrid plasmonic magnetic nanoparticles as molecular specific agents for MRI/optical imaging and photothermal therapy of cancer cells. Nanotechnology 18:325101
Babes L, Denizot B, Tanguy G, Le Jeune JJ, Jallet P (1999) Synthesis of iron oxide nanoparticles used as MRI contrast agents: a parametric study. J Colloid Interface Sci 212:474
Mahon E, Salvati A, Baldelli Bombelli F, Lynch I, Dawson KA (2012) Designing the nanoparticle-biomolecule interface for “targeting and therapeutic delivery”. J Control Release 161:164
Kim J, Kim HS, Lee N, Kim t, Kim H, Yu T, Song IC, Moon WK, Hyeon T (2008) Multifunctional uniform nanoparticles composed of a magnetite nanocrystal core and a mesoporous silica shell for magnetic resonance and fluorescence imaging and for drug delivery. Angew Chem Int Ed Engl 47:8438
Brullot W, Reddy NK, Wouters J, Valev VK, Goderis B, Vermant J, Verbiest T (2012) Versatile ferrofluids based on polyethylene glycol coated iron oxide nanoparticles. J Magn Magn Mater 324:1919
Bedanta S, Kleemann W (2009) Supermagnetism. J Phys D Appl Phys 42:013001
Shahbazi-Gahrouei D, Abdolahi M, Zarkesh-Esfahani SH, Laurent S, Sermeus C, Gruettner C (2013) Functionalized magnetic nanoparticles for the detection and quantitative analysis of cell surface antigen. Biomed Res Int 2013:349408
Xu H, Aguilar ZP, Yang L, Kuang M, Duan H, Xiong Y, Wei H, Wang A (2011) Antibody conjugated magnetic iron oxide nanoparticles for cancer cell separation in fresh whole blood. Biomaterials 32:9758
Na HB, Palui G, Rosenberg JT, Ji X, Grant SC, Mattoussi H (2012) Multidentate catechol-based polyethylene glycol oligomers provide enhanced stability and biocompatibility to iron oxide nanoparticles. ACS Nano 6:389
Petri-Fink A, Steitz B, Finka A, Salaklang J, Hofmann H (2008) Effect of cell media on polymer coated superparamagnetic iron oxide nanoparticles (SPIONs): colloidal stability, cytotoxicity, and cellular uptake studies. Eur J Pharm Biopharm 68:129
Ji X, Shao R, Elliott AM, Stafford RJ, Esparza-Coss E, Bankson JA, Liang G, Luo ZP, Park K, Markert JT, Li C (2007) Bifunctional gold nanoshells with a superparamagnetic iron oxide-silica core suitable for both mr imaging and photothermal therapy. J Phys Chem C Nanomater Interf 111:6245
Bloemen M, Van Stappen T, Willot P, Lammertyn J, Koeckelberghs G, Geukens N, Gils A, Verbiest T (2014) Heterobifunctional PEG ligands for bioconjugation reactions on iron oxide nanoparticles. PLoS One 9:e109475
Koh I, Wang X, Varughese B, Isaacs L, Ehrman SH, English DS (2006) Magnetic iron oxide nanoparticles for biorecognition: evaluation of surface coverage and activity. J Phys Chem B 110:1553
Dupont D, Brullot W, Bloemen M, Verbiest T, Binnemans K (2014) Selective uptake of rare earths from aqueous solutions by EDTA-functionalized magnetic and nonmagnetic nanoparticles. ACS Appl Mater Interfaces 6:4980
Horák D, Babic M, Macková H, Benes MJ (2007) Preparation and properties of magnetic nano- and microsized particles for biological and environmental separations. J Sep Sci 30:1751
Chalmers JJ, Xiong Y, Jin X, Shao M, Tong X, Farag S, Zborowski M (2010) Quantification of non-specific binding of magnetic micro- and nanoparticles using cell tracking velocimetry: Implication for magnetic cell separation and detection. Biotechnol Bioeng 105:1078
Chalasani R, Vasudevan S (2012) Cyclodextrin functionalized magnetic iron oxide nanocrystals: a host-carrier for magnetic separation of non-polar molecules and arsenic from aqueous media. J Mater Chem 22:14925
Atlas RM (1999) Legionella: from environmental habitats to disease pathology, detection and control. Environ Microbiol 1:283
Vogel JP, Isberg RR (1999) Cell biology of Legionella pneumophila. Curr Opin Microbiol 2:30–34
Behets J, Seghi F, Declerck P, Verelst L, Duvivier L, Van Damme A, Ollevier F (2003) Detection of Naegleria spp. and Naegleria fowleri: a comparison of flagellation tests, ELISA and PCR. Water Sci Technol 47:117
Behets J, Declerck P, Delaedt Y, Creemers B, Ollevier F (2006) Quantitative detection and differentiation of free-living amoeba species using SYBR green–based real-time PCR melting curve analysis. Curr Microbiol 53:506
Pernin P, Pélandakis M, Rouby YA (1998) Comparative recoveries of Naegleria fowleri amoebae from seeded river water by filtration and centrifugation. Appl Environ Microbiol 64:955
Yáñez MA, Carrasco-Serrano C, Barberá VM, Catalán V (2005) Quantitative detection of Legionella pneumophila in water samples by immunomagnetic purification and real-time PCR amplification of the dotA gene. Appl Environ Microbiol 71:3433
Demeke T, Jenkins GR (2010) Influence of DNA extraction methods, PCR inhibitors and quantification methods on real-time PCR assay of biotechnology-derived traits. Anal Bioanal Chem 396:1977
Lundqvist M, Stigler J, Elia G, Lynch I, Verdervall T, Dawson KA (2008) Nanoparticle size and surface properties determine the protein corona with possible implications for biological impacts. Proc Natl Acad Sci U S A 105:14265
Van De Craen B, Scroyen I, Vranckx C, Compernolle G, Lijnen HR, Declerck PJ, Gils A (2012) Maximal PAI-1 inhibition in vivo requires neutralizing antibodies that recognize and inhibit glycosylated PAI-1. Thromb Res 129:e126
Van Stappen T, Brouwers E, Tops S, Geukens N, Vermeire S, Declerck PJ, Gils A (2014) Generation of a highly specific monoclonal anti-infliximab antibody for harmonization of TNF-coated infliximab assays. Ther Drug Monit. Just Accepted
Bloemen M, Brullot W, Luong TT, Geukens N, Gils A, Verbiest T (2012) Improved functionalization of oleic acid-coated iron oxide nanoparticles for biomedical applications. J Nanoparticle Res 14:1100
Köhler R, Bubert A, Goebel W, Steinert M, Hacker J, Bubert B (2000) Expression and use of the green fluorescent protein as a reporter system in Legionella pneumophila. MGG - Mol Gen Genet 262:1060
Behets J, Declerck P, Delaedt Y, Creemers B, Ollevier F (2007) Development and evaluation of a Taqman duplex real-time PCR quantification method for reliable enumeration of Legionella pneumophila in water samples. J Microbiol Methods 68:137
Park J, An K, Hwang Y, Park JG, Noh HJ, Kim JY, Park JH, Hwang NM, Hyeon T (2004) Ultra-large-scale syntheses of monodisperse nanocrystals. Nat Mater 3:891
Schladt TD, Schneider K, Schild H, Tremel W (2011) Synthesis and bio-functionalization of magnetic nanoparticles for medical diagnosis and treatment. Dalt Trans 40:6315
Hermanson G (2008) Bioconjugate techniques, 2nd ed. 1202
Rao SV, Anderson KW, Bachas LG (1998) Oriented immobilization of proteins. Mikrochim Acta 128:127
Acknowledgments
We thank prof. Johan Billen for helping with the TEM measurements. This work was financially supported by grant G.0618.11 N of the Fund for scientific research Flanders (FWO-V) and the Agency for Innovation by Science and Technology in Flanders (IWT). M. Bloemen is grateful for support from the IWT.
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The authors declare that they have no conflict of interest.
Compliance with ethical standards
All legal and ethical requirements for the welfare of animals were met by the Animalium Department of the KU Leuven.
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Bloemen, M., Denis, C., Peeters, M. et al. Antibody-modified iron oxide nanoparticles for efficient magnetic isolation and flow cytometric determination of L. pneumophila . Microchim Acta 182, 1439–1446 (2015). https://doi.org/10.1007/s00604-015-1466-z
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DOI: https://doi.org/10.1007/s00604-015-1466-z