151
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Yang M, Wang T, Wang Y, Jiang C, Chen J, Zhao Y, Wang H, Jiang Y, Sun G, Liu J. Ultra-small and size tunable PVP-NaGdF4:Dy nanoparticles with high biocompatibility for multimodal tumor imaging. RSC Adv 2016. [DOI: 10.1039/c6ra18780c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Ultra-small PVP-NaGdF4:Dy nanoprobes were prepared and they could induce obvious signal enhancement in T1/T2-weighted MRI and CT imaging.
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152
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Sabir N, Khan N, Völkner J, Widdascheck F, del Pino P, Witte G, Riedel M, Lisdat F, Konrad M, Parak WJ. Photo-electrochemical Bioanalysis of Guanosine Monophosphate Using Coupled Enzymatic Reactions at a CdS/ZnS Quantum Dot Electrode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:5844-5850. [PMID: 26395754 DOI: 10.1002/smll.201501883] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 08/10/2015] [Indexed: 06/05/2023]
Abstract
A photo-electrochemical sensor for the specific detection of guanosine monophosphate (GMP) is demonstrated, based on three enzymes combined in a coupled reaction assay. The first reaction involves the adenosine triphosphate (ATP)-dependent conversion of GMP to guanosine diphosphate (GDP) by guanylate kinase, which warrants substrate specificity. The reaction products ADP and GDPare co-substrates for the enzymatic conversion of phosphoenolpyruvate to pyruvate in a second reaction mediated by pyruvate kinase. Pyruvate in turn is the co-substrate for lactate dehydrogenase that generates lactate via oxidation of nicotinamide adenine dinucleotide (reduced form) NADH to NAD(+). This third enzymatic reaction is electrochemically detected. For this purpose a CdS/ZnS quantum dot (QD) electrode is illuminated and the photocurrent response under fixed potential conditions is evaluated. The sequential enzyme reactions are first evaluated in solution. Subsequently, a sensor for GMP is constructed using polyelectrolytes for enzyme immobilization.
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Affiliation(s)
- Nadeem Sabir
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032, Marburg, Germany
| | - Nazimuddin Khan
- Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077, Göttingen, Germany
| | - Johannes Völkner
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032, Marburg, Germany
| | - Felix Widdascheck
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032, Marburg, Germany
| | - Pablo del Pino
- CIC biomaGUNE, Parque Tecnológico de San Sebastián, P° Miramón 182 - Ed. Empresarial C, 20009, San Sebastian, Spain
| | - Gregor Witte
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032, Marburg, Germany
| | - Marc Riedel
- Biosystems Technology, Institute of Applied Life Sciences, Technical University Wildau, Hochschulring 1, D-15745, Wildau, Germany
| | - Fred Lisdat
- Biosystems Technology, Institute of Applied Life Sciences, Technical University Wildau, Hochschulring 1, D-15745, Wildau, Germany
| | - Manfred Konrad
- Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, D-37077, Göttingen, Germany
| | - Wolfgang J Parak
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, D-35032, Marburg, Germany
- CIC biomaGUNE, Parque Tecnológico de San Sebastián, P° Miramón 182 - Ed. Empresarial C, 20009, San Sebastian, Spain
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153
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Zhang Q, Castellanos-Rubio I, Munshi R, Orue I, Pelaz B, Gries KI, Parak WJ, del Pino P, Pralle A. Model Driven Optimization of Magnetic Anisotropy of Exchange-coupled Core-Shell Ferrite Nanoparticles for Maximal Hysteretic Loss. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2015; 27:7380-7387. [PMID: 31105383 PMCID: PMC6519962 DOI: 10.1021/acs.chemmater.5b03261] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
This study provides a guide to maximizing hysteretic loss by matching the design and synthesis of superparamagnetic nanoparticles to the desired hyperthermia application. The maximal heat release from magnetic nanoparticles to the environment depends on intrinsic properties of magnetic nanoparticles (e.g. size, magnetization, and magnetic anisotropy), and extrinsic properties of the applied fields (e.g. frequency, field strength). Often, the biomedical hyperthermia application limits flexibility in setting of many parameters (e.g. nanoparticle size and mobility, field strength and frequency). We show that core-shell nanoparticles combining a soft (Mn ferrite) and a hard (Co ferrite) magnetic material form a system in which the effective magnetic anisotropy can be easily tuned independently of the nanoparticle size. A theoretical framework to include the crystal anisotropy contribution of the Co ferrite phase to the nanoparticles total anisotropy is developed. The experimental results confirm that this framework predicts the hysteretic heating loss correctly when including non-linear effects in an effective susceptibility. Hence, we provide a guide on how to characterize the magnetic anisotropy of core-shell magnetic nanoparticles, model the expected heat loss and therefore, synthesize tuned nanoparticles for a particular biomedical application.
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Affiliation(s)
- Qian Zhang
- Department of Physics, Philipps University Marburg, Marburg, Germany
| | | | - Rahul Munshi
- Department of Physics, University at Buffalo, Buffalo, NY 14260, USA
| | - Iñaki Orue
- SGIker Medidas Magneticas, F. Ciencia y Tecnologia, Sarriena s/n, 48940 Leioa, Spain
| | - Beatriz Pelaz
- Department of Physics, Philipps University Marburg, Marburg, Germany
| | | | - Wolfgang J. Parak
- Department of Physics, Philipps University Marburg, Marburg, Germany
- CIC biomaGUNE, Paseo Miramón n° 182, 20009 San Sebastian, Spain
| | - Pablo del Pino
- CIC biomaGUNE, Paseo Miramón n° 182, 20009 San Sebastian, Spain
| | - Arnd Pralle
- Department of Physics, University at Buffalo, Buffalo, NY 14260, USA
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154
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Shamirian A, Appelbe O, Zhang Q, Ganesh B, Kron SJ, Snee PT. A toolkit for bioimaging using near-infrared AgInS 2/ZnS quantum dots. J Mater Chem B 2015; 3:8188-8196. [PMID: 32262876 PMCID: PMC8176442 DOI: 10.1039/c5tb00247h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Presented are a set of procedures to produce water-soluble AgInS2/ZnS near-infrared emitting quantum dots for use as biological imaging agents. The known difficulty of producing near-infrared core/shell materials is resolved by overcoating the AgInS2 cores at a low temperature using highly reactive precursors. Several methods are explored to impart water solubility of the hydrophobic as-prepared materials. Insofar as achieving aqueous dispersion of quantum dots has only limited biological utility, several methods to further functionalize them are examined. In vivo studies are conducted using these quantum dots to demonstrate the ability to model delivery of nanoparticles to the tumour microenvironment.
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Affiliation(s)
- Armen Shamirian
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 28807, USA.
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155
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Wang W, Ji X, Kapur A, Zhang C, Mattoussi H. A multifunctional polymer combining the imidazole and zwitterion motifs as a biocompatible compact coating for quantum dots. J Am Chem Soc 2015; 137:14158-72. [PMID: 26465679 DOI: 10.1021/jacs.5b08915] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We introduce a set of multicoordinating imidazole- and zwitterion-based ligands suited for surface functionalization of quantum dots (QDs). The polymeric ligands are built using a one-step nucleophilic addition reaction between poly(isobutylene-alt-maleic anhydride) and distinct amine-containing functionalities. This has allowed us to introduce several imidazole anchoring groups along the polymer chain for tight coordination to the QD surface and a controllable number of zwitterion moieties for water solubilization. It has also permitted the introduction of reactive and biomolecular groups for further conjugation and targeting. The QDs capped with these new ligands exhibit excellent long-term colloidal stability over a broad range of pH, toward excess electrolyte, in cell-growth media, and in the presence of natural reducing agents such as glutathione. These QDs are also resistant to the oxidizing agent H2O2. More importantly, by the use of zwitterion moieties as the hydrophilic block, this polymer design provides QDs with a thin coating and compact overall dimensions. These QDs are easily self-assembled with full size proteins expressed with a polyhistidine tag via metal-histidine coordination. Additionally, the incorporation of amine groups allows covalent coupling of the QDs to the neurotransmitter dopamine. This yields redox-active QD platforms that can be used to track pH changes and detect Fe ions and cysteine through charge-transfer interactions. Finally, we found that QDs cap-exchanged with folic acid-functionalized ligands could effectively target cancer cells, where folate-receptor-mediated endocytosis of QDs into living cells was time- and concentration-dependent.
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Affiliation(s)
- Wentao Wang
- Department of Chemistry and Biochemistry, Florida State University , 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Xin Ji
- Department of Chemistry and Biochemistry, Florida State University , 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Anshika Kapur
- Department of Chemistry and Biochemistry, Florida State University , 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Chengqi Zhang
- Department of Chemistry and Biochemistry, Florida State University , 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Hedi Mattoussi
- Department of Chemistry and Biochemistry, Florida State University , 95 Chieftan Way, Tallahassee, Florida 32306, United States
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156
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Abdelmonem AM, Pelaz B, Kantner K, Bigall NC, Del Pino P, Parak WJ. Charge and agglomeration dependent in vitro uptake and cytotoxicity of zinc oxide nanoparticles. J Inorg Biochem 2015; 153:334-338. [PMID: 26387023 DOI: 10.1016/j.jinorgbio.2015.08.029] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 08/20/2015] [Accepted: 08/28/2015] [Indexed: 01/19/2023]
Abstract
The influence of the surface charge and the state of agglomeration of ZnO nanoparticles on cellular uptake and viability are investigated. For this purpose, ZnO nanoparticles were synthesized by colloidal routes and their physicochemical properties were investigated in detail. Three different surface modifications were investigated, involving coatings with the amphiphilic polymer poly(isobutylene-alt-maleic anhydride)-graft-dodecyl, mercaptoundecanoic acid, and L-arginine, which provide the nanoparticles with either a negative or a positive zeta-potential. The hydrodynamic diameters and zeta-potentials of all three nanoparticle species were investigated at different pH values and NaCl concentrations by means of dynamic light scattering and laser Doppler anemometry, respectively. The three differently modified ZnO nanoparticle species of similar sizes were also investigated in respect to their cellular uptake by 3T3 fibroblasts and HeLa cells, and their effect on cell viability.
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Affiliation(s)
| | - Beatriz Pelaz
- Fachbereich Physik, Philipps Universität Marburg, Marburg, Germany
| | - Karsten Kantner
- Fachbereich Physik, Philipps Universität Marburg, Marburg, Germany
| | - Nadja C Bigall
- Fachbereich Physik, Philipps Universität Marburg, Marburg, Germany
| | | | - Wolfgang J Parak
- Fachbereich Physik, Philipps Universität Marburg, Marburg, Germany; CIC Biomagune, San Sebastian, Spain.
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157
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Liu Z, Chen N, Dong C, Li W, Guo W, Wang H, Wang S, Tan J, Tu Y, Chang J. Facile Construction of Near Infrared Fluorescence Nanoprobe with Amphiphilic Protein-Polymer Bioconjugate for Targeted Cell Imaging. ACS APPLIED MATERIALS & INTERFACES 2015; 7:18997-9005. [PMID: 26262596 DOI: 10.1021/acsami.5b05406] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A simple, straightforward, and reproducible strategy for the construction of a near-infrared (NIR) fluorescence nanoprobe was developed by coating CuInS2/ZnS quantum dots (CIS/ZnS QDs) with a novel amphiphilic bioconjugate. The amphiphilic bioconjugate with a tailor-designed structure of bovine serum albumin (BSA) as the hydrophilic segment and poly(ε-caprolactone) (PCL) as the hydrophobic part was fabricated by chemical coupling the hydrophobic polymer chain to BSA via the maleimide-sulfhydryl reaction. By incorporating CIS/ZnS QDs into the hydrophobic cores of the self-assembly of BSA-PCL conjugate, the constructed NIR fluorescence nanoprobe exhibited excellent fluorescent properties over a wide pH range (pH 3-10) and a good colloidal stability in PBS buffer (pH = 7.4) with or without 10% fetal bovine serum. The presence of the outer BSA shell effectively reduced the nonspecific cellular binding and imparted high biocompatibility and low-toxicity to the probe. Moreover, the NIR fluorescence nanoprobe could be functionalized by conjugating cyclic Arg-Gly-Asp (cRGD) peptide, and the decorated nanoprobe was shown to be highly selective for targeted integrin αvβ3-overexpressed tumor cell imaging. The feasibility of the constructed NIR fluorescence probe in vivo application was further investigated and the results demonstrated its great potential for in vivo imaging. This developed protocol for phase transfer of the CIS/ZnS QDs was universal and applicable to other nanoparticles stabilized with hydrophobic ligands.
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Affiliation(s)
- Zhongyun Liu
- School of Life Sciences, Tianjin University and Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology , Tianjin 300072, P.R. China
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences , Yantai, Shandong 264003, P.R. China
| | - Na Chen
- Department of Medical Radioprotection, School of Radiation Medicine and Health, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, Soochow University , Suzhou, 200072, P. R. China
| | - Chunhong Dong
- School of Life Sciences, Tianjin University and Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology , Tianjin 300072, P.R. China
| | - Wei Li
- Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052, P. R. China
| | - Weisheng Guo
- School of Life Sciences, Tianjin University and Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology , Tianjin 300072, P.R. China
| | - Hanjie Wang
- School of Life Sciences, Tianjin University and Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology , Tianjin 300072, P.R. China
| | - Sheng Wang
- School of Life Sciences, Tianjin University and Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology , Tianjin 300072, P.R. China
| | - Jian Tan
- Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052, P. R. China
| | - Yu Tu
- Department of Medical Radioprotection, School of Radiation Medicine and Health, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection, Soochow University , Suzhou, 200072, P. R. China
| | - Jin Chang
- School of Life Sciences, Tianjin University and Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology , Tianjin 300072, P.R. China
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158
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Comparison of the in Vitro Uptake and Toxicity of Collagen- and Synthetic Polymer-Coated Gold Nanoparticles. NANOMATERIALS 2015; 5:1418-1430. [PMID: 28347072 PMCID: PMC5304636 DOI: 10.3390/nano5031418] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 08/19/2015] [Accepted: 08/20/2015] [Indexed: 12/24/2022]
Abstract
We studied the physico-chemical properties (size, shape, zeta-potential), cellular internalization and toxicity of gold nanoparticles (NPs) stabilized with the most abundant mammalian protein, collagen. The properties of these gold NPs were compared to the same sized gold NPs coated with synthetic poly(isobutylene-alt-maleic anhydride) (PMA). Intracellular uptake and cytotoxicity were assessed in two cell lines (cervical carcinoma and lung adenocarcinoma cells) by employing inductively-coupled plasma-mass spectrometry (ICP-MS) analysis and a cell viability assay based on 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), respectively. We found that the collagen-coated gold NPs exhibit lower cytotoxicity, but higher uptake levels than PMA-coated gold NPs. These results demonstrate that the surface coating of Au NPs plays a decisive role in their biocompatibility.
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159
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Affiliation(s)
- Xuan Yang
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | | | - Bo Pang
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | | | - Younan Xia
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
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160
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Zeininger L, Petzi S, Schönamsgruber J, Portilla L, Halik M, Hirsch A. Very Facile Polarity Umpolung and Noncovalent Functionalization of Inorganic Nanoparticles: A Tool Kit for Supramolecular Materials Chemistry. Chemistry 2015; 21:14030-5. [DOI: 10.1002/chem.201501682] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Lukas Zeininger
- Department Chemie und Pharmazie, Institut für Organische Chemie, Henkestrasse 42, 91054 Erlangen (Germany)
| | - Stefanie Petzi
- Department Chemie und Pharmazie, Institut für Organische Chemie, Henkestrasse 42, 91054 Erlangen (Germany)
| | - Jörg Schönamsgruber
- Department Chemie und Pharmazie, Institut für Organische Chemie, Henkestrasse 42, 91054 Erlangen (Germany)
| | - Luis Portilla
- Department Werkstoffwissenschaften, Organic Materials and Devices (OMD), Martensstrasse 7, 91058 Erlangen (Germany)
| | - Marcus Halik
- Department Werkstoffwissenschaften, Organic Materials and Devices (OMD), Martensstrasse 7, 91058 Erlangen (Germany)
| | - Andreas Hirsch
- Department Chemie und Pharmazie, Institut für Organische Chemie, Henkestrasse 42, 91054 Erlangen (Germany)
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161
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Di Silvio D, Rigby N, Bajka B, Mayes A, Mackie A, Baldelli Bombelli F. Technical tip: high-resolution isolation of nanoparticle-protein corona complexes from physiological fluids. NANOSCALE 2015; 7:11980-11990. [PMID: 26108682 DOI: 10.1039/c5nr02618k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanoparticles (NPs) in contact with biological fluids are generally coated with environmental proteins, forming a stronger layer of proteins around the NP surface called the hard corona. Protein corona complexes provide the biological identity of the NPs and their isolation and characterization are essential to understand their in vitro and in vivo behaviour. Here we present a one-step methodology to recover NPs from complex biological media in a stable non-aggregated form without affecting the structure or composition of the corona. This method allows NPs to be separated from complex fluids containing biological particulates and in a form suitable for use in further experiments. The study has been performed systematically comparing the new proposed methodology to standard approaches for a wide panel of NPs. NPs were first incubated in the biological fluid and successively recovered by sucrose gradient ultracentrifugation in order to separate the NPs and their protein corona from the loosely bound proteins. The isolated NP-protein complexes were characterized by size and protein composition through Dynamic Light Scattering, Nanoparticle Tracking Analysis, SDS-PAGE and LC-MS. The protocol described is versatile and can be applied to diverse nanomaterials and complex fluids. It is shown to have higher resolution in separating the multiple protein corona complexes from a biological environment with a much lower impact on their in situ structure compared to conventional centrifugal approaches.
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Affiliation(s)
- Desirè Di Silvio
- School of Pharmacy, University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK
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162
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Pyell U, Jalil AH, Pfeiffer C, Pelaz B, Parak WJ. Characterization of gold nanoparticles with different hydrophilic coatings via capillary electrophoresis and Taylor dispersion analysis. Part I: Determination of the zeta potential employing a modified analytic approximation. J Colloid Interface Sci 2015; 450:288-300. [DOI: 10.1016/j.jcis.2015.03.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 02/20/2015] [Accepted: 03/06/2015] [Indexed: 01/06/2023]
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163
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Manganese oxide and docetaxel co-loaded fluorescent polymer nanoparticles for dual modal imaging and chemotherapy of breast cancer. J Control Release 2015; 209:186-96. [DOI: 10.1016/j.jconrel.2015.04.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 03/02/2015] [Accepted: 04/18/2015] [Indexed: 01/01/2023]
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164
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Pyell U, Jalil AH, Urban DA, Pfeiffer C, Pelaz B, Parak WJ. Characterization of hydrophilic coated gold nanoparticles via capillary electrophoresis and Taylor dispersion analysis. Part II: Determination of the hydrodynamic radius distribution - Comparison with asymmetric flow field-flow fractionation. J Colloid Interface Sci 2015; 457:131-40. [PMID: 26164244 DOI: 10.1016/j.jcis.2015.06.042] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 06/12/2015] [Accepted: 06/26/2015] [Indexed: 01/18/2023]
Abstract
In the first paper of this series we have shown for hydrophilic coated Au nanoparticles that capillary electrophoresis in combination with Taylor dispersion analysis in fused silica capillaries with an inner diameter of 75 μm allows for the unbiased precise determination of the number-weighted mean hydrodynamic diameter, the zeta potential and the effective charge number, although mobility corrected double layer polarization has to be taken into account. In this second paper we investigate whether the modified approximate analytic expression developed by Ohshima (2001) permits the calculation of calibration lines and the concomitant conversion of electropherograms into number-weighted particle radius distributions. We show that with the method developed size distributions are obtained which are independent of the measurement conditions. These size distributions are much narrower than those obtained via dynamic light scattering and data evaluation by the CONTIN algorithm. Capillary electrophoresis together with the proposed data evaluation method reveals that the analyzed nanoparticle populations have very narrow size distributions with a width of 2-4 nm. The hydrodynamic radius distributions of the coated NPs are only slightly broader than the solid particle radius distribution of the Au-NP cores. The presence of monomodal/bimodal size distributions is confirmed by asymmetric flow field-flow fractionation.
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Affiliation(s)
- Ute Pyell
- University of Marburg, Department of Chemistry, Hans-Meerwein-Straße, D-35032 Marburg, Germany.
| | - Alaa H Jalil
- University of Marburg, Department of Chemistry, Hans-Meerwein-Straße, D-35032 Marburg, Germany
| | - Dominic A Urban
- University of Marburg, Department of Chemistry, Hans-Meerwein-Straße, D-35032 Marburg, Germany
| | - Christian Pfeiffer
- University of Marburg, Department of Physics, Renthof 7, D-35032 Marburg, Germany
| | - Beatriz Pelaz
- University of Marburg, Department of Physics, Renthof 7, D-35032 Marburg, Germany
| | - Wolfgang J Parak
- University of Marburg, Department of Physics, Renthof 7, D-35032 Marburg, Germany
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165
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Montoro Bustos AR, Garcia-Cortes M, González-Iglesias H, Ruiz Encinar J, Costa-Fernández JM, Coca-Prados M, Sanz-Medel A. Sensitive targeted multiple protein quantification based on elemental detection of Quantum Dots. Anal Chim Acta 2015; 879:77-84. [DOI: 10.1016/j.aca.2015.03.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/06/2015] [Accepted: 03/07/2015] [Indexed: 10/23/2022]
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166
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Peng E, Wang F, Zheng B, Li SFY, Xue JM. Engineered water-soluble two-dimensional magnetic nanocomposites: towards highly magnetic relaxometric properties. NANOSCALE 2015; 7:7819-7832. [PMID: 25848729 DOI: 10.1039/c5nr00810g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Water dispersible two-dimensional magnetic nanocomposites are formed by phase-transferring hydrophobic manganese-doped ferrite nanoparticles (MFPs) into aqueous solvent using a one-step simple approach involving only graphene oxide (GO) as the phase transfer agent. The resultant hydrophilic magnetic nanocomposites (MFNs) are surprisingly stable in the aqueous phase despite its large hydrodynamic size (dhyd). Because of its unique construct that promotes water accessibility towards the MFP core, large MFNs loaded with an 18 nm MFP core (MFN-18; dhyd = 577.9 nm) exhibits transverse relaxivity (r2) up to ∼6.8 times (r2 = 800.8 mM [Mn + Fe](-1) s(-1)) higher than the typical individually coated MFP-18 with amphiphilic brush copolymers (r2 = 117.3 mM [Mn + Fe](-1) s(-1)). Meanwhile, the overall nanocomposites dhyd can be further reduced by employing a smaller pre-sonicated GO sheet phase transfer agent. As a result of using small GO sheets with enhanced hydrophilicity, the r2 of small MFN-18* nanocomposites (dhyd = 224.9 nm) increases by approximately 37% (r2 = 1097.4 mM [Mn + Fe](-1) s(-1)) as compared to larger MFN-18. From a simple comparative study among various magnetic nanocomposites involving a MFP-18 core, the high MFN-18 r2 relaxivity value can be attributed to enhanced water diffusion and exchange due to the GO sheet, allowing better interaction between magnetic the MFP core and water protons. The proposed method can be readily extended to convert other types of hydrophobic nanoparticles into water-dispersible nanocomposites.
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Affiliation(s)
- Erwin Peng
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore (NUS), 7 Engineering Drive 1, Singapore 117574.
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167
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Yuan M, Zhong R, Yun X, Hou J, Du Q, Zhao G, Zhang F. A fluorimetric study on the interaction between a Trp-containing beta-strand peptide and amphiphilic polymer-coated gold nanoparticles. LUMINESCENCE 2015; 31:47-53. [DOI: 10.1002/bio.2920] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 02/09/2015] [Accepted: 03/14/2015] [Indexed: 12/23/2022]
Affiliation(s)
- Ming Yuan
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
| | - Ruibo Zhong
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
| | - Xiaoling Yun
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
| | - Jiahua Hou
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
| | - Qiqige Du
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
| | - Guofen Zhao
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
| | - Feng Zhang
- School of Life Science; Inner Mongolia Agricultural University; Hohhot China
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168
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Wang W, Kapur A, Ji X, Safi M, Palui G, Palomo V, Dawson PE, Mattoussi H. Photoligation of an amphiphilic polymer with mixed coordination provides compact and reactive quantum dots. J Am Chem Soc 2015; 137:5438-51. [PMID: 25797052 DOI: 10.1021/jacs.5b00671] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We introduce a new set of multicoordinating polymers as ligands that combine two distinct metal-chelating groups, lipoic acid and imidazole, for the surface functionalization of QDs. These ligands combine the benefits of thiol and imidazole coordination to reduce issues of thiol oxidation and weak binding affinity of imidazole. The ligand design relies on the introduction of controllable numbers of lipoic acid and histamine anchors, along with hydrophilic moieties and reactive functionalities, onto a poly(isobutylene-alt-maleic anhydride) chain via a one-step nucleophilic addition reaction. We further demonstrate that this design is fully compatible with a novel and mild photoligation strategy to promote the in situ ligand exchange and phase transfer of hydrophobic QDs to aqueous media under borohydride-free conditions. Ligation with these polymers provides highly fluorescent QDs that exhibit great long-term colloidal stability over a wide range of conditions, including a broad pH range (3-13), storage at nanomolar concentration, under ambient conditions, in 100% growth media, and in the presence of competing agents with strong reducing property. We further show that incorporating reactive groups in the ligands permits covalent conjugation of fluorescent dye and redox-active dopamine to the QDs, producing fluorescent platforms where emission is controlled/tuned by Förster Resonance Energy Transfer (FRET) or pH-dependent charge transfer (CT) interactions. Finally, the polymer-coated QDs have been coupled to cell-penetrating peptides to facilitate intracellular uptake, while subsequent cytotoxicity tests show no apparent decrease in cell viability.
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Affiliation(s)
- Wentao Wang
- †Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Anshika Kapur
- †Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Xin Ji
- †Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Malak Safi
- †Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Goutam Palui
- †Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Valle Palomo
- ‡Department of Chemistry and Department of Cell Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Philip E Dawson
- ‡Department of Chemistry and Department of Cell Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Hedi Mattoussi
- †Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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169
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Bian T, Wang C, Lu Z, Xie R, Yang QZ, Wu LZ, Tung CH, Liu Z, Yin Y, Zhang T. A versatile 'click chemistry' route to size-restricted, robust, and functionalizable hydrophilic nanocrystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1644-1648. [PMID: 25504669 DOI: 10.1002/smll.201400673] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 09/29/2014] [Indexed: 06/04/2023]
Abstract
A versatile addition-crosslinking route is developed to transfer various hydrophobic nanocrystals into water. By assembling amphiphilic ligands and then crosslinking through 'click chemistry', a monolayer of polymer forms on the nanocrystal surface, leading to excellent stability and limited increase in hydrodynamic diameter. These nanocrystals can also be further functionalized easily for various applications such as catalysis, bioimaging, and medical therapy.
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Affiliation(s)
- Tong Bian
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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170
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Kaladhar K, Renz H, Sharma C. Nano-anisotropic surface coating based on drug immobilized pendant polymer to suppress macrophage adhesion response. Colloids Surf B Biointerfaces 2015; 128:8-16. [DOI: 10.1016/j.colsurfb.2015.01.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/10/2015] [Accepted: 01/29/2015] [Indexed: 01/29/2023]
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171
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Galbiati E, Cassani M, Verderio P, Martegani E, Colombo M, Tortora P, Mazzucchelli S, Prosperi D. Peptide-Nanoparticle Ligation Mediated by Cutinase Fusion for the Development of Cancer Cell-Targeted Nanoconjugates. Bioconjug Chem 2015; 26:680-9. [DOI: 10.1021/acs.bioconjchem.5b00005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Elisabetta Galbiati
- Dipartimento
di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza
della Scienza 2, 20126 Milano, Italy
| | - Marco Cassani
- Dipartimento
di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza
della Scienza 2, 20126 Milano, Italy
| | - Paolo Verderio
- Nerviano Medical Sciences s.r.l., viale Pasteur 10, 20014 Nerviano (MI), Italy
| | - Enzo Martegani
- Dipartimento
di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza
della Scienza 2, 20126 Milano, Italy
| | - Miriam Colombo
- Dipartimento
di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza
della Scienza 2, 20126 Milano, Italy
| | - Paolo Tortora
- Dipartimento
di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza
della Scienza 2, 20126 Milano, Italy
| | - Serena Mazzucchelli
- Dipartimento
di Scienze Biomediche e Cliniche “Luigi Sacco”, Università di Milano, Ospedale L. Sacco, via G.B. Grassi 74, 20157 Milano, Italy
| | - Davide Prosperi
- Dipartimento
di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza
della Scienza 2, 20126 Milano, Italy
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172
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Bilan R, Fleury F, Nabiev I, Sukhanova A. Quantum Dot Surface Chemistry and Functionalization for Cell Targeting and Imaging. Bioconjug Chem 2015; 26:609-24. [DOI: 10.1021/acs.bioconjchem.5b00069] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Regina Bilan
- Laboratory
of Nano-Bioengineering, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe sh., 115409 Moscow, Russian Federation
| | - Fabrice Fleury
- DNA
repair group, UFIP, CNRS UMR6286, Univertité de Nantes, 2 rue de la
Houssinière, 44322 Nantes Cedex 3, France
| | - Igor Nabiev
- Laboratory
of Nano-Bioengineering, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe sh., 115409 Moscow, Russian Federation
- Laboratoire
de Recherche en Nanosciences, EA4682-LRN, 51 rue Cognacq Jay, UFR
de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France
| | - Alyona Sukhanova
- Laboratory
of Nano-Bioengineering, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe sh., 115409 Moscow, Russian Federation
- Laboratoire
de Recherche en Nanosciences, EA4682-LRN, 51 rue Cognacq Jay, UFR
de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France
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173
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Kantner K, Ashraf S, Carregal-Romero S, Carrillo-Carrion C, Collot M, Del Pino P, Heimbrodt W, De Aberasturi DJ, Kaiser U, Kazakova LI, Lelle M, de Baroja NM, Montenegro JM, Nazarenus M, Pelaz B, Peneva K, Gil PR, Sabir N, Schneider LM, Shabarchina LI, Sukhorukov GB, Vazquez M, Yang F, Parak WJ. Particle-based optical sensing of intracellular ions at the example of calcium - what are the experimental pitfalls? SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:896-904. [PMID: 25504784 DOI: 10.1002/smll.201402110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/24/2014] [Indexed: 06/04/2023]
Abstract
Colloidal particles with fluorescence read-out are commonly used as sensors for the quantitative determination of ions. Calcium, for example, is a biologically highly relevant ion in signaling, and thus knowledge of its spatio-temporal distribution inside cells would offer important experimental data. However, the use of particle-based intracellular sensors for ion detection is not straightforward. Important associated problems involve delivery and intracellular location of particle-based fluorophores, crosstalk of the fluorescence read-out with pH, and spectral overlap of the emission spectra of different fluorophores. These potential problems are outlined and discussed here with selected experimental examples. Potential solutions are discussed and form a guideline for particle-based intracellular imaging of ions.
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Affiliation(s)
- Karsten Kantner
- Fachbereich Physik, Philipps- Universität Marburg, Marburg, Germany
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174
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Peng E, Wang F, Xue JM. Nanostructured magnetic nanocomposites as MRI contrast agents. J Mater Chem B 2015; 3:2241-2276. [PMID: 32262055 DOI: 10.1039/c4tb02023e] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Magnetic resonance imaging (MRI) has become an integral part of modern clinical imaging due to its non-invasiveness and versatility in providing tissue and organ images with high spatial resolution. With the current MRI advancement, MRI imaging probes with suitable biocompatibility, good colloidal stability, enhanced relaxometric properties and advanced functionalities are highly demanded. As such, MRI contrast agents (CAs) have been an extensive research and development area. In the recent years, different inorganic-based nanoprobes comprising inorganic magnetic nanoparticles (MNPs) with an organic functional coating have been engineered to obtain a suitable contrast enhancement effect. For biomedical applications, the organic functional coating is critical to improve colloidal stability and biocompatibility. Simultaneously, it also provides a building block for generating a higher dimensional secondary structure. In this review, the combinatorial design approach by a self-assembling pre-formed hydrophobic inorganic MNPs core (from non-polar thermolysis synthesis) into various functional organic coatings (e.g. ligands, amphiphilic polymers and graphene oxide) to form water soluble nanocomposites will be discussed. The resultant magnetic ensembles were classified based on their dimensionality, namely, 0-D, 1-D, 2-D and 3-D structures. This classification provides further insight into their subsequent potential use as MRI CAs. Special attention will be dedicated towards the correlation between the spatial distribution and the associated MRI applications, which include (i) coating optimization-induced MR relaxivity enhancement, (ii) aggregation-induced MR relaxivity enhancement, (iii) off-resonance saturation imaging (ORS), (iv) magnetically-induced off-resonance imaging (ORI), (v) dual-modalities MR imaging and (vi) multifunctional nanoprobes.
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Affiliation(s)
- Erwin Peng
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore.
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175
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Zhang L, Becton M, Wang X. Designing Nanoparticle Translocation through Cell Membranes by Varying Amphiphilic Polymer Coatings. J Phys Chem B 2015; 119:3786-94. [DOI: 10.1021/acs.jpcb.5b00825] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Liuyang Zhang
- College of Engineering and NanoSEC, University of Georgia, Athens, Georgia 30602, United States
| | - Matthew Becton
- College of Engineering and NanoSEC, University of Georgia, Athens, Georgia 30602, United States
| | - Xianqiao Wang
- College of Engineering and NanoSEC, University of Georgia, Athens, Georgia 30602, United States
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176
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Oxidation of glucose to gluconic acid using a colloidal catalyst containing gold nanoparticles and glucose oxidase. Russ Chem Bull 2015. [DOI: 10.1007/s11172-014-0541-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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177
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Wang K, Zhang X, Zhang X, Yang B, Li Z, Zhang Q, Huang Z, Wei Y. Fluorescent Glycopolymer Nanoparticles Based on Aggregation-Induced Emission Dyes: Preparation and Bioimaging Applications. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201400564] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ke Wang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Xiaoyong Zhang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Xiqi Zhang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Bin Yang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Zhen Li
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Qingsong Zhang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Zengfang Huang
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
| | - Yen Wei
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research; Tsinghua University; Beijing 100084 P.R. China
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178
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Surface functionalization of quantum dots for biological applications. Adv Colloid Interface Sci 2015; 215:28-45. [PMID: 25467038 DOI: 10.1016/j.cis.2014.11.004] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 10/25/2014] [Accepted: 11/10/2014] [Indexed: 01/17/2023]
Abstract
Quantum dots are a group of inorganic nanomaterials exhibiting exceptional optical and electronic properties which impart distinct advantages over traditional fluorescent organic dyes in terms of tunable broad excitation and narrow emission spectra, signal brightness, high quantum yield and photo-stability. Aqueous solubility and surface functionalization are the most common problems for QDs employed in biological research. This review addresses the recent research progress made to improve aqueous solubility, functionalization of biomolecules to QD surface and the poorly understood chemistry involved in the steps of bio-functionalization of such nanoparticles.
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179
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Tang H, Zhou C, Wu R, Mao M, Shen H, Li LS. The enhanced fluorescence properties & colloid stability of aqueous CdSe/ZnS QDs modified with N-alkylated poly(ethyleneimine). NEW J CHEM 2015. [DOI: 10.1039/c4nj02349h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Amino-functionalized hydrophilic QDs insulated with PEI(n)Cs had enhanced PL intensity and colloidal stability compared to those of PEI-QDs.
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Affiliation(s)
- Huanjie Tang
- Key Laboratory for Special Functional Materials of the Ministry of Education
- Henan University
- Kaifeng
- P. R. China
| | - Changhua Zhou
- Key Laboratory for Special Functional Materials of the Ministry of Education
- Henan University
- Kaifeng
- P. R. China
- Collaborative Innovation Center of Nano Functional Materials and Applications
| | - Ruili Wu
- Key Laboratory for Special Functional Materials of the Ministry of Education
- Henan University
- Kaifeng
- P. R. China
- Collaborative Innovation Center of Nano Functional Materials and Applications
| | - Mao Mao
- Key Laboratory for Special Functional Materials of the Ministry of Education
- Henan University
- Kaifeng
- P. R. China
| | - Huaibin Shen
- Key Laboratory for Special Functional Materials of the Ministry of Education
- Henan University
- Kaifeng
- P. R. China
- Collaborative Innovation Center of Nano Functional Materials and Applications
| | - Lin Song Li
- Key Laboratory for Special Functional Materials of the Ministry of Education
- Henan University
- Kaifeng
- P. R. China
- Collaborative Innovation Center of Nano Functional Materials and Applications
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180
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Zhong R, Liu Y, Zhang P, Liu J, Zhao G, Zhang F. Discrete nanoparticle-BSA conjugates manipulated by hydrophobic interaction. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19465-19470. [PMID: 25372929 DOI: 10.1021/am506497s] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanoparticle-protein conjugates are promising probes for biological diagnostics as well as versatile building blocks for nanotechnology. Here we demonstrate a facile method to prepare nanoparticles bearing discrete numbers of BSA simply by physical adsorption and electrophoretic isolation, in which the specific amphiphilic properties of BSA play important roles and the number of adsorbed BSA molecules can also be manipulated by tuning the coating extent of nanoparticles by amphiphilic polymer.
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Affiliation(s)
- Ruibo Zhong
- School of Life Science, Inner Mongolia Agricultural University , 306 Zhaowuda Road, Hohhot 010018, China
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181
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Maffre P, Brandholt S, Nienhaus K, Shang L, Parak WJ, Nienhaus GU. Effects of surface functionalization on the adsorption of human serum albumin onto nanoparticles - a fluorescence correlation spectroscopy study. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:2036-47. [PMID: 25551031 PMCID: PMC4273259 DOI: 10.3762/bjnano.5.212] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 10/15/2014] [Indexed: 05/18/2023]
Abstract
By using fluorescence correlation spectroscopy (FCS), we have studied the adsorption of human serum albumin (HSA) onto Fe-Pt nanoparticles (NPs, 6 nm radius), CdSe/ZnS quantum dots (QDs, 5 nm radius) and Au and Ag nanoclusters (1-4 nm radius), which are enshrouded by various water-solubilizing surface layers exposing different chemical functional groups (carboxyl, amino and both), thereby endowing the NPs with different surface charges. We have also measured the effects of modified surface functionalizations on the protein via succinylation and amination. A step-wise increase in hydrodynamic radius with protein concentration was always observed, revealing formation of protein monolayers coating the NPs, independent of their surface charge. The differences in the thickness of the protein corona were rationalized in terms of the different orientations in which HSA adsorbs onto the NPs. The midpoints of the binding transition, which quantifies the affinity of HSA toward the NP, were observed to differ by almost four orders of magnitude. These variations can be understood in terms of specific Coulombic interactions between the proteins and the NP surfaces.
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Affiliation(s)
- Pauline Maffre
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Stefan Brandholt
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Karin Nienhaus
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Li Shang
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Wolfgang J Parak
- Department of Physics, Philipps University Marburg, Renthof 7, 35037 Marburg, Germany
| | - G Ulrich Nienhaus
- Institute of Applied Physics and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801, USA
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182
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Avvakumova S, Fezzardi P, Pandolfi L, Colombo M, Sansone F, Casnati A, Prosperi D. Gold nanoparticles decorated by clustered multivalent cone-glycocalixarenes actively improve the targeting efficiency toward cancer cells. Chem Commun (Camb) 2014; 50:11029-32. [DOI: 10.1039/c4cc03159h] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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183
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Conde J, Dias JT, Grazú V, Moros M, Baptista PV, de la Fuente JM. Revisiting 30 years of biofunctionalization and surface chemistry of inorganic nanoparticles for nanomedicine. Front Chem 2014; 2:48. [PMID: 25077142 PMCID: PMC4097105 DOI: 10.3389/fchem.2014.00048] [Citation(s) in RCA: 224] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 06/24/2014] [Indexed: 01/04/2023] Open
Abstract
In the last 30 years we have assisted to a massive advance of nanomaterials in material science. Nanomaterials and structures, in addition to their small size, have properties that differ from those of larger bulk materials, making them ideal for a host of novel applications. The spread of nanotechnology in the last years has been due to the improvement of synthesis and characterization methods on the nanoscale, a field rich in new physical phenomena and synthetic opportunities. In fact, the development of functional nanoparticles has progressed exponentially over the past two decades. This work aims to extensively review 30 years of different strategies of surface modification and functionalization of noble metal (gold) nanoparticles, magnetic nanocrystals and semiconductor nanoparticles, such as quantum dots. The aim of this review is not only to provide in-depth insights into the different biofunctionalization and characterization methods, but also to give an overview of possibilities and limitations of the available nanoparticles.
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Affiliation(s)
- João Conde
- Harvard-MIT Division for Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of TechnologyCambridge, MA, USA
| | - Jorge T. Dias
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Valeria Grazú
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Maria Moros
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
| | - Pedro V. Baptista
- CIGMH, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de LisboaCaparica, Portugal
| | - Jesus M. de la Fuente
- Nanotherapy and Nanodiagnostics Group, Instituto de Nanociencia de Aragon, Universidad de ZaragozaZaragoza, Spain
- Fundacion ARAIDZaragoza, Spain
- Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Bio-Nano Science and Engineering, Institute of Nano Biomedicine and Engineering, Research Institute of Translation Medicine, Shanghai Jiao Tong UniversityShanghai, China
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184
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Castellanos-Rubio I, Insausti M, Garaio E, Gil de Muro I, Plazaola F, Rojo T, Lezama L. Fe3O4 nanoparticles prepared by the seeded-growth route for hyperthermia: electron magnetic resonance as a key tool to evaluate size distribution in magnetic nanoparticles. NANOSCALE 2014; 6:7542-52. [PMID: 24890223 DOI: 10.1039/c4nr00646a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Monodispersed Fe3O4 nanoparticles have been synthesized by a thermal decomposition method based on the seeded-growth technique, achieving size tunable nanoparticles with high crystallinity and high saturation magnetization. EMR spectroscopy becomes a very efficient complementary tool to determine the fine details of size distributions of MNPs and even to estimate directly the size in a system composed of a given type of magnetic nanoparticles. The size and size dispersity affect directly the efficiency of MNPs for hyperthermia and EMR provides a direct evaluation of these characteristics almost exactly in the same preparation and with the same concentration as used in hyperthermia experiments. The correlation observed between the Specific Absorption Rate (SAR) and the effective gyromagnetic factor (geff) is extremely remarkable and renders a way to assess directly the heating capacity of a MNP system.
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Affiliation(s)
- Idoia Castellanos-Rubio
- Dpto. de Química Inorgánica, Universidad del País Vasco UPV/EHU, P.O. Box. 644, E-48080, Bilbao, Spain.
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185
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Speranskaya ES, Beloglazova NV, Abé S, Aubert T, Smet PF, Poelman D, Goryacheva IY, De Saeger S, Hens Z. Hydrophilic, bright CuInS2 quantum dots as Cd-free fluorescent labels in quantitative immunoassay. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7567-7575. [PMID: 24892375 DOI: 10.1021/la501268b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the synthesis of core-shell CuInS2/ZnS quantum dots (QDs) in organic solution, their encapsulation with a PEG-containing amphiphilic polymer, and the application of the resulting water-soluble QDs as fluorescent label in quantitative immunoassay. By optimizing the methods for core synthesis and shell growth, CuInS2/ZnS QDs were obtained with a quantum yield of 50% on average after hydrophilization. After conjugation with an aflatoxin B1-protein derivative, the obtained QDs were used as fluorescent labels in microplate immunoassay for the quantitative determination of the mycotoxin aflatoxin B1. QDs-based immunoassay showed higher sensitivity compared to enzyme-based immunoassay.
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Affiliation(s)
- Elena S Speranskaya
- Laboratory of Food Analysis, Faculty of Pharmaceutical Sciences, Ghent University , Harelbekestraat 72, 9000 Gent, Belgium
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186
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Wang W, Ji X, Na HB, Safi M, Smith A, Palui G, Perez JM, Mattoussi H. Design of a multi-dopamine-modified polymer ligand optimally suited for interfacing magnetic nanoparticles with biological systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6197-6208. [PMID: 24805794 DOI: 10.1021/la500974r] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have designed a set of multifunctional and multicoordinating polymer ligands that are optimally suited for surface functionalizing iron oxide and potentially other magnetic nanoparticles (NPs) and promoting their integration into biological systems. The amphiphilic polymers are prepared by coupling (via nucleophilic addition) several amine-terminated dopamine anchoring groups, poly(ethylene glycol) moieties, and reactive groups onto a poly(isobutylene-alt-maleic anhydride) (PIMA) chain. This design greatly benefits from the highly efficient and reagent-free one-step reaction of maleic anhydride groups with amine-containing molecules. The availability of several dopamine groups in the same ligand greatly enhances the ligand affinity, via multiple coordination, to the magnetic NPs, while the hydrophilic and reactive groups promote colloidal stability in buffer media and allow subsequent conjugation with target biomolecules. Iron oxide nanoparticles ligand exchanged with these polymer ligands have a compact hydrodynamic size and exhibit enhanced long-term colloidal stability over the pH range of 4-12 and in the presence of excess electrolytes. Nanoparticles ligated with terminally reactive polymers have been easily coupled to target dyes and tested in live cell imaging with no measurable cytotoxicity. Finally, the resulting hydrophilic nanoparticles exhibit large and size-dependent r2 relaxivity values.
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Affiliation(s)
- Wentao Wang
- Department of Chemistry and Biochemistry, Florida State University , 95 Chieftan Way, Tallahassee, Florida 32306, United States
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187
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Yang L, Ke Y. Synthesis of polystyrene nanolatexes via emulsion polymerization using sodium dodecyl sulfonate as the emulsifier. HIGH PERFORM POLYM 2014. [DOI: 10.1177/0954008314533979] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Polystyrene (PS) nanolatexes were successfully prepared via emulsion polymerization using sodium dodecyl sulfonate as the emulsifier. The effects of emulsifier concentration, initiator concentration, polymerization reaction time, and polymerization reaction temperature on particle size and size distribution of PS colloidal spheres were investigated, respectively. The particle size of the diluted polymer emulsion was about 20 nm, as determined by laser scattering. These obtained PS particles were also characterized using Fourier transform infrared spectroscopy and scanning electron microscopy.
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Affiliation(s)
- Liyan Yang
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, China
| | - Yangchuan Ke
- State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing, China
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188
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Schürch D, Vanhecke D, Clift MJD, Raemy D, de Aberasturi DJ, Parak WJ, Gehr P, Petri-Fink A, Rothen-Rutishauser B. Modeling nanoparticle-alveolar epithelial cell interactions under breathing conditions using captive bubble surfactometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4924-32. [PMID: 24731173 DOI: 10.1021/la500307q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Many advances have been made in recent years in cell culture models of the epithelial barrier of the lung from simple monolayers to complex 3-D systems employing different cell types. However, the vast majority of these models still present a static air-liquid interface which is unrealistic given the dynamic nature of breathing. We present here a method where epithelial lung cells are integrated into a system, the captive bubble surfactometer, which allows the cyclical compression and expansion of the surfactant film at the air-liquid interface, thus modeling the dynamics of breathing. We found that cellular uptake of deposited gold nanoparticles was significantly increased under the dynamic (breathing) conditions of compression and expansion as compared to static conditions. The method could be very useful for studying nanoparticle-alveolar lung cell interactions under breathing conditions for applications in nanomedicine and toxicology.
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Affiliation(s)
- David Schürch
- Adolphe Merkle Institute, University of Fribourg , Fribourg, Switzerland
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189
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Yao J, Yang M, Duan Y. Chemistry, Biology, and Medicine of Fluorescent Nanomaterials and Related Systems: New Insights into Biosensing, Bioimaging, Genomics, Diagnostics, and Therapy. Chem Rev 2014; 114:6130-78. [DOI: 10.1021/cr200359p] [Citation(s) in RCA: 592] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jun Yao
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Mei Yang
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yixiang Duan
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
- Research
Center of Analytical Instrumentation, College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China
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190
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Canfarotta F, Piletsky SA. Engineered magnetic nanoparticles for biomedical applications. Adv Healthc Mater 2014; 3:160-75. [PMID: 24497448 DOI: 10.1002/adhm.201300141] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Indexed: 12/11/2022]
Abstract
In the past decades, magnetic nanoparticles (MNPs) have been used in wide range of diverse applications, ranging from separation to sensing. Here, synthesis and applications of functionalized MNPs in the biomedical field are discussed, in particular in drug delivery, imaging, and cancer therapy, highlighting also recent progresses in the development of multifunctional and stimuli-responsive MNPs. The role of their size, composition, and surface functionalization is analyzed, together with their biocompatibility issues.
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191
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Tyrakowski CM, Snee PT. A primer on the synthesis, water-solubilization, and functionalization of quantum dots, their use as biological sensing agents, and present status. Phys Chem Chem Phys 2014; 16:837-55. [DOI: 10.1039/c3cp53502a] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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192
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Liu XL, Choo ESG, Ahmed AS, Zhao LY, Yang Y, Ramanujan RV, Xue JM, Fan DD, Fan HM, Ding J. Magnetic nanoparticle-loaded polymer nanospheres as magnetic hyperthermia agents. J Mater Chem B 2014; 2:120-128. [DOI: 10.1039/c3tb21146k] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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193
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Cheng X, Lowe SB, Reece PJ, Gooding JJ. Colloidal silicon quantum dots: from preparation to the modification of self-assembled monolayers (SAMs) for bio-applications. Chem Soc Rev 2014; 43:2680-700. [DOI: 10.1039/c3cs60353a] [Citation(s) in RCA: 326] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Summarizes recent advances in the preparation, surface modification and bio-applications of silicon quantum dots.
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Affiliation(s)
- Xiaoyu Cheng
- School of Chemistry
- The University of New South Wales
- Sydney, Australia
- Australian Centre for Nanomedicine
- The University of New South Wales
| | - Stuart B. Lowe
- School of Chemistry
- The University of New South Wales
- Sydney, Australia
- Australian Centre for Nanomedicine
- The University of New South Wales
| | - Peter J. Reece
- School of Physics
- The University of New South Wales
- Sydney, Australia
| | - J. Justin Gooding
- School of Chemistry
- The University of New South Wales
- Sydney, Australia
- Australian Centre for Nanomedicine
- The University of New South Wales
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194
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Finetti C, Colombo M, Prosperi D, Alessio G, Morasso C, Sola L, Chiari M. One-pot phase transfer and surface modification of CdSe–ZnS quantum dots using a synthetic functional copolymer. Chem Commun (Camb) 2014; 50:240-2. [DOI: 10.1039/c3cc46086j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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195
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Grzelczak M, Sánchez-Iglesias A, Liz-Marzán LM. A general approach toward polymer-coated plasmonic nanostructures. CrystEngComm 2014. [DOI: 10.1039/c4ce00724g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A generic method for the preparation of polymer-coated plasmonic nanostructures with tunable thickness of the hydrophobic polymer spacer.
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Affiliation(s)
- Marek Grzelczak
- Bionanoplasmonics Laboratory
- CIC biomaGUNE
- , Spain
- Ikerbasque
- Basque Foundation for Science
| | | | - Luis M. Liz-Marzán
- Bionanoplasmonics Laboratory
- CIC biomaGUNE
- , Spain
- Ikerbasque
- Basque Foundation for Science
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196
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Wang W, Aldeek F, Ji X, Zeng B, Mattoussi H. A multifunctional amphiphilic polymer as a platform for surface-functionalizing metallic and other inorganic nanostructures. Faraday Discuss 2014; 175:137-51. [DOI: 10.1039/c4fd00154k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We designed a new set of polymer ligands that combine multiple metal-coordinating groups and short polyethylene glycol (PEG) moieties in the same structure. The ligand design relies on the controlled grafting of a large number of amine-terminated histamines and PEG short chains onto a poly(isobutylene-alt-maleic anhydride) backbone,viaa one-step nucleophilic addition reaction. This addition reaction is highly efficient, can be carried out in organic media and does not require additional reagents. We show that when imidazole groups are used the resulting polymer ligand can strongly ligate onto metal nanostructures such as nanoparticles (NPs) and nanorods (NRs) made of gold cores. The resulting polymer-coated NPs and NRs exhibit good colloidal stability to pH changes and added electrolytes. This constitutes a departure from the use of thiol-based ligands to coordinate on Au surfaces. The present chemical approach also opens up additional opportunities for designing hydrophilic and reactive platforms where the polymer coating can be adjusted to various metal and metal oxide surfaces by simply modifying or combining the addition reaction with other metal coordinating groups. These could include iron oxide NPs and semiconductor QDs. These polymer-capped NPs and NRs can be used to develop biologically-active platforms with potential use for drug delivery and sensing.
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Affiliation(s)
- Wentao Wang
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee, USA
| | - Fadi Aldeek
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee, USA
| | - Xin Ji
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee, USA
| | - Birong Zeng
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee, USA
| | - Hedi Mattoussi
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee, USA
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197
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Abstract
Quantum Dots (QDs) are semiconductor nanocrystals with distinct photophysical properties finding applications in biology, biosensing, and optoelectronics. Polymeric coatings of QDs are used primarily to provide long-term colloidal stability to QDs dispersed in solutions and also as a source of additional functional groups used in further chemical derivatization of the nanoparticles. We review the coating methods, including multidentate and amphiphilic polymeric coatings, and grafting-to and grafting-from approaches. We highlight the most commonly used polymers and discuss how their chemical structure influences the coating properties.
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Affiliation(s)
- Nikodem Tomczak
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602.
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198
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Guo S, Miao L, Wang Y, Huang L. Unmodified drug used as a material to construct nanoparticles: delivery of cisplatin for enhanced anti-cancer therapy. J Control Release 2013; 174:137-42. [PMID: 24280262 DOI: 10.1016/j.jconrel.2013.11.019] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/21/2013] [Accepted: 11/18/2013] [Indexed: 10/26/2022]
Abstract
The poor solubility of cisplatin (CDDP) often presents a major obstacle in the formulation of CDDP in nanoparticles (NPs) by traditional methods. We have developed a novel method for synthesizing CDDP NPs taking advantage of its poor solubility. By mixing two reverse microemulsions containing KCl and a highly soluble precursor of CDDP, cis-diaminedihydroplatinum (II), we have successfully formulated CDDP NPs with a controllable size (in the range of 12-75nm) and high drug loading capacity (approximately 80wt.%). The formulation was done in two steps. The pure CDDP NPs were first stabilized for dispersion in an organic solvent by coating with 1, 2-dioleoyl-sn-glycero-3-phosphate (DOPA). Both x-ray photoelectron spectroscopy and (1)H NMR data confirmed that the major ingredient of the DOPA-coated NPs was CDDP. After purification, additional lipids were added to stabilize the NPs for dispersion in an aqueous solution. The final NPs contain a lipid bilayer coating and are named Lipid-Pt-Cl (LPC) NPs, which showed significant antitumor activity both in vitro and in vivo. Thus, CDDP precipitate serves as the major material for assembling the novel NPs. This unique method of nanoparticle synthesis may be applicable in formulating other insoluble drugs.
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Affiliation(s)
- Shutao Guo
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Lei Miao
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Yuhua Wang
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Leaf Huang
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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199
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Schmidtke C, Kreuziger AM, Alpers D, Jacobsen A, Leshch Y, Eggers R, Kloust H, Tran H, Ostermann J, Schotten T, Thiem J, Thimm J, Weller H. Glycoconjugated amphiphilic polymers via click-chemistry for the encapsulation of quantum dots. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12593-12600. [PMID: 24028496 DOI: 10.1021/la402826f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Herein, we present a strategy for the glycoconjugation of nanoparticles (NPs), with a special focus on fluorescent quantum dots (QDs), recently described by us as "preassembly" approach. Therein, prior to the encapsulation of diverse nanoparticles by an amphiphilic poly(isoprene)-b-poly(ethylene glycol) diblock copolymer (PI-b-PEG), the terminal PEG appendage was modified by covalently attaching a carbohydrate moiety using Huisgen-type click-chemistry. Successful functionalization was proven by NMR spectroscopy. The terminally glycoconjugated polymers were subsequently used for the encapsulation of QDs in a phase transfer process, which fully preserved fluorescence properties. Binding of these nanoconstructs to the lectin Concanavalin A (Con A) was studied via surface plasmon resonance (SPR). Depending on the carbohydrate moiety, namely, D-manno-heptulose, D-glucose, D-galactose, 2-deoxy-2-{[methylamino)carbonyl]amino}-D-glucopyranose ("des(nitroso)-streptozotocin"), or D-maltose, the glycoconjugated QDs showed enhanced affinity constants due to multivalent binding effects. None of the constructs showed toxicity from 0.001 to 1 μM (particle concentration) using standard WST and LDH assays on A549 cells.
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Affiliation(s)
- Christian Schmidtke
- Institute of Physical Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
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200
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Speranskaya ES, Beloglazova NV, Lenain P, De Saeger S, Wang Z, Zhang S, Hens Z, Knopp D, Niessner R, Potapkin DV, Goryacheva IY. Polymer-coated fluorescent CdSe-based quantum dots for application in immunoassay. Biosens Bioelectron 2013; 53:225-31. [PMID: 24140873 DOI: 10.1016/j.bios.2013.09.045] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 09/10/2013] [Accepted: 09/20/2013] [Indexed: 11/17/2022]
Abstract
The paper describes all stages of synthesis and characterization of biocompatible CdSe-based core/shell quantum dots (QDs) and their application as fluorescent label for immunoassay. Special attention was focused on development of maleic anhydride-based amphiphilic polymers for QDs solubilization in aqueous media. In this work two PEG-amines were tried for polymer modification: monoamine Jeffamine M 1000 used previously in some researches and diamine Jeffamine ED-2003 applied for the first time for QDs solubilization. The use of different Jeffamines allows us to obtain QDs with carboxyl or amine functional groups available for conjugation. The influence of polymer composition on optical properties of the nanocrystals and their stability in aqueous solutions as well as on their conjugation with biomolecules was studied. QDs with different coatings were used as biolabels in quantitative fluorescence microtiter plate immunoassay and qualitative on-site column test. It was found that quantum dots covered with amphiphilic polymer prepared from poly(maleic anhydride-alt-1-octadecene) and Jeffamine ED-2003 retained up to 90% of their initial brightness, easily conjugated with protein and showed low non-specific adsorption. In optimized conditions the obtained QDs were successfully used for determination of mycotoxin deoxynivalenol in wheat and maize samples by fluorescence microtiter plate immunoassay with an IC50 of 220 μg kg(-1) and by on-site column test with cut-off of 500 μg kg(-1).
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Affiliation(s)
- Elena S Speranskaya
- Department of General and Inorganic Chemistry, Chemistry Institute, Saratov State University, Astrakhanskaya 83, 410012 Saratov, Russia; Laboratory of Food Analysis, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium.
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