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Wagner LS, Prymak O, Schaller T, Beuck C, Loza K, Niemeyer F, Gumbiowski N, Kostka K, Bayer P, Heggen M, Oliveira CLP, Epple M. The Molecular Footprint of Peptides on the Surface of Ultrasmall Gold Nanoparticles (2 nm) Is Governed by Steric Demand. J Phys Chem B 2024; 128:4266-4281. [PMID: 38640461 DOI: 10.1021/acs.jpcb.4c01294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
Ultrasmall gold nanoparticles were functionalized with peptides of two to seven amino acids that contained one cysteine molecule as anchor via a thiol-gold bond and a number of alanine residues as nonbinding amino acid. The cysteine was located either in the center of the molecule or at the end (C-terminus). For comparison, gold nanoparticles were also functionalized with cysteine alone. The particles were characterized by UV spectroscopy, differential centrifugal sedimentation (DCS), high-resolution transmission electron microscopy (HRTEM), and small-angle X-ray scattering (SAXS). This confirmed the uniform metal core (2 nm diameter). The hydrodynamic diameter was probed by 1H-DOSY NMR spectroscopy and showed an increase in thickness of the hydrated peptide layer with increasing peptide size (up to 1.4 nm for heptapeptides; 0.20 nm per amino acid in the peptide). 1H NMR spectroscopy of water-dispersed nanoparticles showed the integrity of the peptides and the effect of the metal core on the peptide. Notably, the NMR signals were very broad near the metal surface and became increasingly narrow in a distance. In particular, the methyl groups of alanine can be used as probe for the resolution of the NMR spectra. The number of peptide ligands on each nanoparticle was determined using quantitative 1H NMR spectroscopy. It decreased with increasing peptide length from about 100 for a dipeptide to about 12 for a heptapeptide, resulting in an increase of the molecular footprint from about 0.1 to 1.1 nm2.
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Affiliation(s)
- Lisa-Sofie Wagner
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Torsten Schaller
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Christine Beuck
- Institute of Biology and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Felix Niemeyer
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Nina Gumbiowski
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Kathrin Kostka
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Peter Bayer
- Institute of Biology and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
| | - Marc Heggen
- Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, Jülich 52428, Germany
| | | | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, Essen 45117, Germany
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Wolff N, Loza K, Heggen M, Schaller T, Niemeyer F, Bayer P, Beuck C, Oliveira CLP, Prymak O, Weidenthaler C, Epple M. Ultrastructure and Surface Composition of Glutathione-Terminated Ultrasmall Silver, Gold, Platinum, and Alloyed Silver-Platinum Nanoparticles (2 nm). Inorg Chem 2023; 62:17470-17485. [PMID: 37820300 DOI: 10.1021/acs.inorgchem.3c02879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Alloyed ultrasmall silver-platinum nanoparticles (molar ratio Ag:Pt = 50:50) were prepared and compared to pure silver, platinum, and gold nanoparticles, all with a metallic core diameter of 2 nm. They were surface-stabilized by a layer of glutathione (GSH). A comprehensive characterization by high-resolution transmission electron microscopy (HRTEM), electron diffraction (ED), X-ray diffraction (XRD), small-angle X-ray scattering (SAXS), differential centrifugal sedimentation (DCS), and UV spectroscopy showed their size both in the dry and in the water-dispersed state (hydrodynamic diameter). Solution NMR spectroscopy (1H, 13C, COSY, HSQC, HMBC, and DOSY) showed the nature of the glutathione shell including the number of GSH ligands on each nanoparticle (about 200 with a molecular footprint of 0.063 nm2 each). It furthermore showed that there are at least two different positions for the GSH ligand on the gold nanoparticle surface. Platinum strongly reduced the resolution of the NMR spectra compared to silver and gold, also in the alloyed nanoparticles. X-ray photoelectron spectroscopy (XPS) showed that silver, platinum, and silver-platinum particles were at least partially oxidized to Ag(+I) and Pt(+II), whereas the gold nanoparticles showed no sign of oxidation. Platinum and gold nanoparticles were well crystalline but twinned (fcc lattice) despite the small particle size. Silver was crystalline in electron diffraction but not in X-ray diffraction. Alloyed silver-platinum nanoparticles were almost fully amorphous by both methods, indicating a considerable internal disorder.
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Affiliation(s)
- Natalie Wolff
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Essen 45117, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Essen 45117, Germany
| | - Marc Heggen
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, Jülich 52428, Germany
| | - Torsten Schaller
- Organic Chemistry, University of Duisburg-Essen, Essen 45117, Germany
| | - Felix Niemeyer
- Organic Chemistry, University of Duisburg-Essen, Essen 45117, Germany
| | - Peter Bayer
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Essen 45117, Germany
| | - Christine Beuck
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Essen 45117, Germany
| | | | - Oleg Prymak
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Essen 45117, Germany
| | - Claudia Weidenthaler
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Essen 45117, Germany
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Breisch M, Olejnik M, Loza K, Prymak O, Rosenkranz N, Bünger J, Sengstock C, Köller M, Westphal G, Epple M. Cell-Biological Response and Sub-Toxic Inflammatory Effects of Titanium Dioxide Particles with Defined Polymorphic Phase, Size, and Shape. Nanomaterials (Basel) 2023; 13:nano13101621. [PMID: 37242038 DOI: 10.3390/nano13101621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/03/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023]
Abstract
Six types of titanium dioxide particles with defined size, shape, and crystal structure (polymorphic form) were prepared: nanorods (70 × 25 nm2), rutile sub-microrods (190 × 40 nm2), rutile microspheres (620 nm), anatase nanospheres (100 nm), anatase microspheres (510 nm), and amorphous titania microspheres (620 nm). All particles were characterized by scanning electron microscopy, X-ray powder diffraction, dynamic light scattering, infrared spectroscopy, and UV spectroscopy. The sub-toxic cell-biological response to these particles by NR8383 macrophages was assessed. All particle types were taken up well by the cells. The cytotoxicity and the induction of reactive oxygen species (ROS) were negligible for all particles up to a dose of 100 µg mL-1, except for rutile microspheres which had a very rough surface in contrast to anatase and amorphous titania microspheres. The particle-induced cell migration assay (PICMA; based on chemotaxis) of all titanium dioxide particles was comparable to the effect of control silica nanoparticles (50 nm, uncoated, agglomerated) but did not show a trend with respect to particle size, shape, or crystal structure. The coating with carboxymethylcellulose (CMC) had no significant biological effect. However, the rough surface of rutile microspheres clearly induced pro-inflammatory cell reactions that were not predictable by the primary particle size alone.
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Affiliation(s)
- Marina Breisch
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University of Bochum, 44789 Bochum, Germany
| | - Mateusz Olejnik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Nina Rosenkranz
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University of Bochum, 44789 Bochum, Germany
| | - Jürgen Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University of Bochum, 44789 Bochum, Germany
| | - Christina Sengstock
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University of Bochum, 44789 Bochum, Germany
| | - Manfred Köller
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University of Bochum, 44789 Bochum, Germany
| | - Götz Westphal
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University of Bochum, 44789 Bochum, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
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Gumbiowski N, Loza K, Heggen M, Epple M. Automated analysis of transmission electron micrographs of metallic nanoparticles by machine learning. Nanoscale Adv 2023; 5:2318-2326. [PMID: 37056630 PMCID: PMC10089082 DOI: 10.1039/d2na00781a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 03/22/2023] [Indexed: 06/19/2023]
Abstract
Metallic nanoparticles were analysed with respect to size and shape by a machine learning approach. This involved a separation of particles from the background (segmentation), a separation of overlapping particles, and the identification of individual particles. An algorithm to separate overlapping particles, based on ultimate erosion of convex shapes (UECS), was implemented. Finally, particle properties like size, circularity, equivalent diameter, and Feret diameter were computed for each particle of the whole particle population. Thus, particle size distributions can be easily created based on the various parameters. However, strongly overlapping particles are difficult and sometimes impossible to separate because of an a priori unknown shape of a particle that is partially lying in the shadow of another particle. The program is able to extract information from a sequence of images of the same sample, thereby increasing the number of analysed nanoparticles to several thousands. The machine learning approach is well-suited to identify particles at only limited particle-to-background contrast as is demonstrated for ultrasmall gold nanoparticles (2 nm).
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Affiliation(s)
- Nina Gumbiowski
- Inorganic Chemistry, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
| | - Kateryna Loza
- Inorganic Chemistry, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
| | - Marc Heggen
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH 52428 Jülich Germany
| | - Matthias Epple
- Inorganic Chemistry, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
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Sokolova V, Loza K, Ebel JF, Buer J, Westendorf AM, Epple M. Barium sulphate microparticles are taken up by three different cell types: HeLa, THP-1, and hMSC. Acta Biomater 2023; 164:577-587. [PMID: 37019167 DOI: 10.1016/j.actbio.2023.03.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 03/23/2023] [Accepted: 03/29/2023] [Indexed: 04/07/2023]
Abstract
Cytotoxicity and cellular uptake of spherical barium sulphate microparticles (diameter 1 µm) were studied with three different cell lines, i.e. THP-1 cells (monocytes; model for a phagocytosing cell line), HeLa cells (epithelial cells; model for a non-phagocytosing cell line), and human mesenchymal stem cells (hMSCs; model for non-phagocytosing primary cells). Barium sulphate is a chemically and biologically inert solid which allows to distinguish two different processes, e.g. the particle uptake and potential adverse biological reactions. Barium sulphate microparticles were surface-coated by carboxymethylcellulose (CMC) which gave the particles a negative charge. Fluorescence was added by conjugating 6-aminofluorescein to CMC. The cytotoxicity of these microparticles was studied by the MTT test and a live/dead assay. The uptake was visualized by confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). The particle uptake mechanism was quantified by flow cytometry with different endocytosis inhibitors in THP-1 and HeLa cells. The microparticles were easily taken up by all cell types, mostly by phagocytosis and micropinocytosis, within a few hours. STATEMENT OF SIGNIFICANCE: The interaction of particles and cells is of primary importance in nanomedicine, drug delivery, and nanotoxicology. It is commonly assumed that cells take up only nanoparticles unless they are able to phagocytosis. Here, we demonstrate with chemically and biologically inert microparticles of barium sulphate that even non-phagocytosing cells like HeLa and hMSCs take up microparticles to a considerable degree. This has considerable implication in biomaterials science, e.g. in case of abrasive debris and particulate degradation products from implants like endoprostheses.
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Affiliation(s)
- V Sokolova
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany.
| | - K Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany.
| | - J F Ebel
- Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - J Buer
- Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - A M Westendorf
- Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - M Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany.
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Wolff N, Kollenda S, Klein K, Loza K, Heggen M, Brochhagen L, Witzke O, Krawczyk A, Hilger I, Epple M. Silencing of proinflammatory NF-κB and inhibition of herpes simplex virus (HSV) replication by ultrasmall gold nanoparticles (2 nm) conjugated with small-interfering RNA. Nanoscale Adv 2022; 4:4502-4516. [PMID: 36341304 PMCID: PMC9595109 DOI: 10.1039/d2na00250g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 09/03/2022] [Indexed: 06/09/2023]
Abstract
Azide-terminated ultrasmall gold nanoparticles (2 nm gold core) were covalently functionalized with alkyne-terminated small-interfering siRNA duplexes by copper-catalyzed azide-alkyne cycloaddition (CuAAC; click chemistry). The nanoparticle core was visualized by transmission electron microscopy. The number of attached siRNA molecules per nanoparticle was determined by a combination of atomic absorption spectroscopy (AAS; for gold) and UV-Vis spectroscopy (for siRNA). Each nanoparticle carried between 6 and 10 siRNA duplex molecules which corresponds to a weight ratio of siRNA to gold of about 2.2 : 1. Different kinds of siRNA were conjugated to the nanoparticles, depending on the gene to be silenced. In general, the nanoparticles were readily taken up by cells and highly efficient in gene silencing, in contrast to free siRNA. This was demonstrated in HeLa-eGFP cells (silencing of eGFP) and in LPS-stimulated macrophages (silencing of NF-κB). Furthermore, we demonstrated that nanoparticles carrying antiviral siRNA potently inhibited the replication of Herpes simplex virus 2 (HSV-2) in vitro. This highlights the strong potential of siRNA-functionalized ultrasmall gold nanoparticles in a broad spectrum of applications, including gene silencing and treatment of viral infections, combined with a minimal dose of gold.
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Affiliation(s)
- Natalie Wolff
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
| | - Sebastian Kollenda
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
| | - Kai Klein
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
| | - Marc Heggen
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH 52428 Jülich Germany
| | - Leonie Brochhagen
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Hospital Essen, University of Duisburg-Essen Hufelandstr. 55 45147 Essen Germany
| | - Oliver Witzke
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Hospital Essen, University of Duisburg-Essen Hufelandstr. 55 45147 Essen Germany
| | - Adalbert Krawczyk
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Hospital Essen, University of Duisburg-Essen Hufelandstr. 55 45147 Essen Germany
| | - Ingrid Hilger
- Department of Experimental Radiology, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller University Jena Am Klinikum 1 07740 Jena Germany
| | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 45117 Essen Germany
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Epple M, Fischer C, Loza K. Ein Gartenpool im kalten Sommer – wie wird er warm? CHEM UNSERER ZEIT 2022. [DOI: 10.1002/ciuz.202100064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Matthias Epple
- Anorganische Chemie Universität Duisburg‐Essen Universitätsstr. 5–7 45117 Essen
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Mendo T, Mendo J, Ransijn JM, Gomez I, Gil-Kodaka P, Fernández J, Delgado R, Travezaño A, Arroyo R, Loza K, McCann P, Crowe S, Jones EL, James MA. Assessing discards in an illegal small-scale fishery using fisher-led reporting. Rev Fish Biol Fish 2022; 32:963-974. [PMID: 35370370 PMCID: PMC8958935 DOI: 10.1007/s11160-022-09708-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
UNLABELLED About a third of all marine fish in the world are caught in Small-Scale Fisheries (SSF). SSF are increasingly recognised as essential for food security and livelihoods for vulnerable and economically fragile communities globally. Although individual SSF vessels are usually perceived as having little impact on the ecosystem, the cumulative impact of gear type and number of vessels may be substantial. Bottom trawling is a common fishing method that can greatly influence the marine ecosystem by damaging the seafloor and generating high levels of discards. However, appropriate sampling coverage using on-board observer programmes to collect these data from SSF are rare, as they are expensive and pose logistical constraints. A mobile App was used to assess whether self-reporting by fishers could provide reliable fine-scale information on fishing effort and discards over time in an illegal shrimp trawling fishery in northern Peru. Maps depicting the spatial distribution of trawling effort and the proportion of discards from observers and fishers were compared using the Similarity in Means (SIM) Index, which ranges from 0 when spatial patterns differ completely to 1 when spatial patterns are very similar. High levels of agreement between spatio-temporal patterns of effort (SIM Index = 0.81) and discards (0.96) were found between fisher and observer maps. Moreover, far greater spatial coverage was accomplished by fishers, suggesting that self-reporting via an App represents a useful approach to collect reliable fisheries data as an initial step for effective monitoring and management of these fisheries. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s11160-022-09708-9.
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Affiliation(s)
- T. Mendo
- Scottish Oceans Institute, University of St Andrews, East Sands, Fife, KY16 8LB UK
| | - J. Mendo
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - J. M. Ransijn
- Scottish Oceans Institute, University of St Andrews, East Sands, Fife, KY16 8LB UK
| | - I. Gomez
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - P. Gil-Kodaka
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - J. Fernández
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - R. Delgado
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - A. Travezaño
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - R. Arroyo
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - K. Loza
- Facultad de Pesquería, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima, Peru
| | - P. McCann
- IT Services, University of St. Andrews, Walter Bower House, Guardbridge, KY16 0US UK
| | - S. Crowe
- IT Services, University of St. Andrews, Walter Bower House, Guardbridge, KY16 0US UK
| | - E. L. Jones
- Biomathematics and Statistics Scotland, Peter Guthrie Tait Road, Edinburgh, UK
| | - M. A. James
- Scottish Oceans Institute, University of St Andrews, East Sands, Fife, KY16 8LB UK
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Wetzel O, Prymak O, Loza K, Gumbiowski N, Heggen M, Bayer P, Beuck C, Weidenthaler C, Epple M. Water-Based Synthesis of Ultrasmall Nanoparticles of Platinum Group Metal Oxides (1.8 nm). Inorg Chem 2022; 61:5133-5147. [PMID: 35285631 DOI: 10.1021/acs.inorgchem.2c00281] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Ultrasmall nanoparticles of platinum group metal oxides (core diameter of about 1.8 nm) were prepared by alkaline hydrolysis of metal precursors in the presence of NaBH4 and by colloidal stabilization with tripeptide glutathione. We obtained water-dispersed nanoparticles of Rh2O3, PdO, RuO2, IrO2, Os/OsO2, and Pt/PtO. Their size was probed using high-resolution transmission electron microscopy, differential centrifugal sedimentation, small-angle X-ray scattering, and diffusion-ordered 1H NMR spectroscopy (1H DOSY). Their oxidation state was clearly determined using X-ray photoelectron spectroscopy, X-ray powder diffraction, and electron diffraction. The chemical composition of the nanoparticles, that is, the ratio of the metal oxide core and glutathione capping agent, was quantitatively determined by a combination of these methods.
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Affiliation(s)
- Oliver Wetzel
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Nina Gumbiowski
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Claudia Weidenthaler
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
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Hosseini S, Wetzel O, Kostka K, Heggen M, Loza K, Epple M. Pathways for Oral and Rectal Delivery of Gold Nanoparticles (1.7 nm) and Gold Nanoclusters into the Colon: Enteric-Coated Capsules and Suppositories. Molecules 2021; 26:5069. [PMID: 34443657 PMCID: PMC8401122 DOI: 10.3390/molecules26165069] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/09/2021] [Accepted: 08/19/2021] [Indexed: 12/26/2022] Open
Abstract
Two ways to deliver ultrasmall gold nanoparticles and gold-bovine serum albumin (BSA) nanoclusters to the colon were developed. First, oral administration is possible by incorporation into gelatin capsules that were coated with an enteric polymer. These permit the transfer across the stomach whose acidic environment damages many drugs. The enteric coating dissolves due to the neutral pH of the colon and releases the capsule's cargo. Second, rectal administration is possible by incorporation into hard-fat suppositories that melt in the colon and then release the nanocarriers. The feasibility of the two concepts was demonstrated by in-vitro release studies and cell culture studies that showed the easy redispersibility after dissolution of the respective transport system. This clears a pathway for therapeutic applications of drug-loaded nanoparticles to address colon diseases, such as chronic inflammation and cancer.
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Affiliation(s)
- Shabnam Hosseini
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Oliver Wetzel
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Kathrin Kostka
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Marc Heggen
- Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany;
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
| | - Matthias Epple
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany; (S.H.); (O.W.); (K.K.); (K.L.)
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Wetzel O, Hosseini S, Loza K, Heggen M, Prymak O, Bayer P, Beuck C, Schaller T, Niemeyer F, Weidenthaler C, Epple M. Metal-Ligand Interface and Internal Structure of Ultrasmall Silver Nanoparticles (2 nm). J Phys Chem B 2021; 125:5645-5659. [PMID: 34029093 DOI: 10.1021/acs.jpcb.1c02512] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ultrasmall silver nanoparticles were prepared by reduction with NaBH4 and surface-terminated with glutathione (GSH). The particles had a solid core diameter of 2 nm as shown by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). NMR-DOSY gave a hydrodynamic diameter of 2 to 2.8 nm. X-ray photoelectron spectroscopy (XPS) showed that silver is bound to the thiol group of the central cysteine in glutathione under partial oxidation to silver(+I). In turn, the thiol group is deprotonated to thiolate. X-ray powder diffraction (XRD) together with Rietveld refinement confirmed a twinned (polycrystalline) fcc structure of ultrasmall silver nanoparticles with a lattice compression of about 0.9% compared to bulk silver metal. By NMR spectroscopy, the interaction between the glutathione ligand and the silver surface was analyzed, also with 13C-labeled glutathione. The adsorbed glutathione is fully intact and binds to the silver surface via cysteine. In situ 1H NMR spectroscopy up to 85 °C in dispersion showed that the glutathione ligand did not detach from the surface of the silver nanoparticle, i.e. the silver-sulfur bond is remarkably strong. The ultrasmall nanoparticles had a higher cytotoxicity than bigger particles in in vitro cell culture with HeLa cells with a cytotoxic concentration of about 1 μg mL-1 after 24 h incubation. The overall stoichiometry of the nanoparticles was about Ag∼250GSH∼155.
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Affiliation(s)
- Oliver Wetzel
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Shabnam Hosseini
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Torsten Schaller
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Felix Niemeyer
- Organic Chemistry, University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
| | - Claudia Weidenthaler
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
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Olejnik M, Breisch M, Sokolova V, Loza K, Prymak O, Rosenkranz N, Westphal G, Bünger J, Köller M, Sengstock C, Epple M. The effect of short silica fibers (0.3 μm 3.2 μm) on macrophages. Sci Total Environ 2021; 769:144575. [PMID: 33486165 DOI: 10.1016/j.scitotenv.2020.144575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
Silica fibers with a dimension of 0.3 μm ∙ 3.2 μm2 nm were prepared by a modified Stöber synthesis as model particles. The particles were characterized by scanning electron microscopy, elemental analysis, thermogravimetry and X-ray powder diffraction. Their uptake by macrophages (THP-1 cells and NR8383 cells) was studied by confocal laser scanning microscopy and scanning electron microscopy. The uptake by cells was very high, but the silica fibers were not harmful to NR8383 cells in concentrations up to 100 μg mL-1. Only above 100 μg mL-1, significant cell toxic effects were observed, probably induced by a high dose of particles that had sedimented on the cells and led to the adverse effects. The chemotactic response as assessed by the particle-induced migration assay (PICMA) was weak in comparison to a control of agglomerated silica particles. The as-prepared fibers were fully X-ray amorphous but crystallized to β-cristobalite after heating to 1000 °C and converted to α-cristobalite upon cooling to ambient temperature. The fibers had sintered to larger aggregates but retained their elongated primary shape. The particle cytotoxicity towards THP-1 cells was not significantly enhanced by the crystallization.
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Affiliation(s)
- Mateusz Olejnik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Marina Breisch
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany
| | - Viktoriya Sokolova
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Nina Rosenkranz
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Götz Westphal
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Jürgen Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Manfred Köller
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany
| | - Christina Sengstock
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany.
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany.
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Zimmermann A, Jaber QZ, Koch J, Riebe S, Vallet C, Loza K, Hayduk M, Steinbuch KB, Knauer SK, Fridman M, Voskuhl J. Luminescent Amphiphilic Aminoglycoside Probes to Study Transfection. Chembiochem 2021; 22:1563-1567. [PMID: 33410196 PMCID: PMC8248372 DOI: 10.1002/cbic.202000725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/06/2021] [Indexed: 12/26/2022]
Abstract
We report the characterization of amphiphilic aminoglycoside conjugates containing luminophores with aggregation-induced emission properties as transfection reagents. These inherently luminescent transfection vectors are capable of binding plasmid DNA through electrostatic interactions; this binding results in an emission "on" signal due to restriction of intramolecular motion of the luminophore core. The luminescent cationic amphiphiles effectively transferred plasmid DNA into mammalian cells (HeLa, HEK 293T), as proven by expression of a red fluorescent protein marker. The morphologies of the aggregates were investigated by microscopy as well as ζ-potential and dynamic light-scattering measurements. The transfection efficiencies using luminescent cationic amphiphiles were similar to that of the gold-standard transfection reagent Lipofectamine® 2000.
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Affiliation(s)
- Alexander Zimmermann
- Faculty of chemistry (Organic Chemistry) andCentre for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstrasse 745117EssenGermany
| | - Qais Z. Jaber
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Johannes Koch
- Center for Medical Biotechnology (ZMB)University of Duisburg EssenUniversitätsstrasse 245141EssenGermany
| | - Steffen Riebe
- Faculty of chemistry (Organic Chemistry) andCentre for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstrasse 745117EssenGermany
| | - Cecilia Vallet
- Institute for Molecular BiologyCentre for Medical Biotechnology (ZMB)University of Duisburg-EssenUniversitätsstrasse 245117EssenGermany
| | - Kateryna Loza
- Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstrasse 745141EssenGermany
| | - Matthias Hayduk
- Faculty of chemistry (Organic Chemistry) andCentre for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstrasse 745117EssenGermany
| | - Kfir B. Steinbuch
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Shirley K. Knauer
- Institute for Molecular BiologyCentre for Medical Biotechnology (ZMB)University of Duisburg-EssenUniversitätsstrasse 245117EssenGermany
| | - Micha Fridman
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Jens Voskuhl
- Faculty of chemistry (Organic Chemistry) andCentre for Nanointegration Duisburg-Essen (CENIDE)University of Duisburg-EssenUniversitätsstrasse 745117EssenGermany
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Salloum S, Bendt G, Heidelmann M, Loza K, Bayesteh S, Sepideh Izadi M, Kawulok P, He R, Schlörb H, Perez N, Reith H, Nielsch K, Schierning G, Schulz S. Influence of Nanoparticle Processing on the Thermoelectric Properties of (Bi x Sb 1-X ) 2 Te 3 Ternary Alloys. ChemistryOpen 2021; 10:189-198. [PMID: 33492752 PMCID: PMC7874259 DOI: 10.1002/open.202000257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/12/2020] [Indexed: 01/09/2023] Open
Abstract
The synthesis of phase-pure ternary solutions of tetradymite-type materials (Bix Sb1-x )2 Te3 (x=0.25; 0.50; 0.75) in an ionic liquid approach has been carried out. The nanoparticles are characterized by means of energy-dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and transmission electron microscopy. In addition, the role of different processing approaches on the thermoelectric properties - Seebeck coefficient as well as electrical and thermal conductivity - is demonstrated.
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Affiliation(s)
- Sarah Salloum
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
| | - Georg Bendt
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
| | - Markus Heidelmann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN)NETZUniversity of Duisburg-EssenCarl-Benz-Str. 19947047DuisburgGermany
| | - Kateryna Loza
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
| | - Samaneh Bayesteh
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
- Institute of Applied PhysicsDresden University of Technology01069DresdenGermany
| | - M. Sepideh Izadi
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
- Institute of Applied PhysicsDresden University of Technology01069DresdenGermany
| | - Patrick Kawulok
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Ran He
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Heike Schlörb
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Nicolas Perez
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Heiko Reith
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Kornelius Nielsch
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
- Institute of Applied PhysicsDresden University of Technology01069DresdenGermany
- Institute of Materials ScienceDresden University of Technology01069DresdenGermany
| | | | - Stephan Schulz
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
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Ruks T, Loza K, Heggen M, Ottmann C, Bayer P, Beuck C, Epple M. Targeting the Surface of the Protein 14-3-3 by Ultrasmall (1.5 nm) Gold Nanoparticles Carrying the Specific Peptide CRaf. Chembiochem 2021; 22:1456-1463. [PMID: 33275809 PMCID: PMC8248332 DOI: 10.1002/cbic.202000761] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 12/04/2020] [Indexed: 12/11/2022]
Abstract
The surface of ultrasmall gold nanoparticles with an average diameter of 1.55 nm was conjugated with a 14-3-3 protein-binding peptide derived from CRaf. Each particle carries 18 CRaf peptides, leading to an overall stoichiometry of Au(115)Craf(18). The binding to the protein 14-3-3 was probed by isothermal titration calorimetry (ITC) and fluorescence polarization spectroscopy (FP). The dissociation constant (KD ) was measured as 5.0 μM by ITC and 0.9 μM by FP, which was close to the affinity of dissolved CRaf to 14-3-3σ. In contrast to dissolved CRaf, which alone did not enter HeLa cells, CRAF-conjugated gold nanoparticles were well taken up by HeLa cells, opening the opportunity to target the protein inside a cell.
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Affiliation(s)
- Tatjana Ruks
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstrasse 5-7, 45117, Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstrasse 5-7, 45117, Essen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Christian Ottmann
- Laboratory of Chemical Biology Department of Biomedical Engineering and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, 5600MB, Eindhoven, The Netherlands
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117, Essen, Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117, Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstrasse 5-7, 45117, Essen, Germany
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van der Meer SB, Seiler T, Buchmann C, Partalidou G, Boden S, Loza K, Heggen M, Linders J, Prymak O, Oliveira CLP, Hartmann L, Epple M. Controlling the Surface Functionalization of Ultrasmall Gold Nanoparticles by Sequence-Defined Macromolecules. Chemistry 2021; 27:1451-1464. [PMID: 32959929 PMCID: PMC7898849 DOI: 10.1002/chem.202003804] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/15/2020] [Indexed: 02/06/2023]
Abstract
Ultrasmall gold nanoparticles (diameter about 2 nm) were surface-functionalized with cysteine-carrying precision macromolecules. These consisted of sequence-defined oligo(amidoamine)s (OAAs) with either two or six cysteine molecules for binding to the gold surface and either with or without a PEG chain (3400 Da). They were characterized by 1 H NMR spectroscopy, 1 H NMR diffusion-ordered spectroscopy (DOSY), small-angle X-ray scattering (SAXS), and high-resolution transmission electron microscopy. The number of precision macromolecules per nanoparticle was determined after fluorescent labeling by UV spectroscopy and also by quantitative 1 H NMR spectroscopy. Each nanoparticle carried between 40 and 100 OAA ligands, depending on the number of cysteine units per OAA. The footprint of each ligand was about 0.074 nm2 per cysteine molecule. OAAs are well suited to stabilize ultrasmall gold nanoparticles by selective surface conjugation and can be used to selectively cover their surface. The presence of the PEG chain considerably increased the hydrodynamic diameter of both dissolved macromolecules and macromolecule-conjugated gold nanoparticles.
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Affiliation(s)
- Selina Beatrice van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | - Theresa Seiler
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Christin Buchmann
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Georgia Partalidou
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Sophia Boden
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | - Marc Heggen
- Ernst Ruska-Center for Microscopy and Spectroscopy with ElectronsForschungszentrum Jülich GmbH52425JülichGermany
| | - Jürgen Linders
- Physical Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
| | | | - Laura Hartmann
- Organic Chemistry and Macromolecular ChemistryHeinrich Heine-University DüsseldorfUniversitätsstr. 140225DüsseldorfGermany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-EssenUniversitätsstr. 5–745117EssenGermany
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Ruks T, Loza K, Heggen M, Prymak O, Sehnem AL, Oliveira CLP, Bayer P, Beuck C, Epple M. Peptide-Conjugated Ultrasmall Gold Nanoparticles (2 nm) for Selective Protein Targeting. ACS Appl Bio Mater 2021. [DOI: 10.1021/acsabm.0c01424] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tatjana Ruks
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Andre Luiz Sehnem
- Institute of Physics, University of São Paulo, Rua do Matão 1371, São Paulo, São Paulo 05508-090, Brazil
| | - Cristiano L. P. Oliveira
- Institute of Physics, University of São Paulo, Rua do Matão 1371, São Paulo, São Paulo 05508-090, Brazil
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
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van der Meer SB, Hadrovic I, Meiners A, Loza K, Heggen M, Knauer SK, Bayer P, Schrader T, Beuck C, Epple M. New Tools to Probe the Protein Surface: Ultrasmall Gold Nanoparticles Carry Amino Acid Binders. J Phys Chem B 2020; 125:115-127. [DOI: 10.1021/acs.jpcb.0c09846] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Selina Beatrice van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Inesa Hadrovic
- Organic Chemistry, University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Annika Meiners
- Department of Molecular Biology II, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Shirley K. Knauer
- Department of Molecular Biology II, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Thomas Schrader
- Organic Chemistry, University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB), University of Duisburg-Essen, 45117 Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117 Essen, Germany
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Kersting M, Olejnik M, Rosenkranz N, Loza K, Breisch M, Rostek A, Westphal G, Bünger J, Ziegler N, Ludwig A, Köller M, Sengstock C, Epple M. Subtoxic cell responses to silica particles with different size and shape. Sci Rep 2020; 10:21591. [PMID: 33299057 PMCID: PMC7726159 DOI: 10.1038/s41598-020-78550-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 11/25/2020] [Indexed: 02/06/2023] Open
Abstract
Health risks from particles are a priority challenge to health protection at work. Despite the ubiquitous exposure to a wide range of particles and the many years of research in this field, there are fundamental unresolved questions regarding the prevention of particle-related respiratory diseases. Here, the highly relevant particulate material silicon dioxide was analyzed with emphasis on defined size and shape. Silica particles were prepared with different size and shape: Spheres (NS nanospheres 60 nm; SMS submicrospheres 230 nm; MS microspheres 430 nm) and rods (SMR submicrorods with d = 125 nm, L = 230 nm; aspect ratio 1:1.8; MR microrods with d = 100 nm, L = 600 nm; aspect ratio 1:6). After an in-depth physicochemical characterization, their effects on NR8383 alveolar macrophages were investigated. The particles were X-ray amorphous, well dispersed, and not agglomerated. Toxic effects were only observed at high concentrations, i.e. ≥ 200 µg mL-1, with the microparticles showing a stronger significant effect on toxicity (MS≈MR > SMR≈SMS≈NS) than the nanoparticles. Special attention was directed to effects in the subtoxic range (less than 50% cell death compared to untreated cells), i.e. below 100 µg mL-1 where chronic health effects may be expected. All particles were readily taken up by NR8383 cells within a few hours and mainly found associated with endolysosomes. At subtoxic levels, neither particle type induced strongly adverse effects, as probed by viability tests, detection of reactive oxygen species (ROS), protein microarrays, and cytokine release (IL-1β, GDF-15, TNF-α, CXCL1). In the particle-induced cell migration assay (PICMA) with leukocytes (dHL-60 cells) and in cytokine release assays, only small effects were seen. In conclusion, at subtoxic concentrations, where chronic health effects may be expected, neither size and nor shape of the synthesized chemically identical silica particles showed harmful cell-biological effects.
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Affiliation(s)
- Markus Kersting
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany
| | - Mateusz Olejnik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Nina Rosenkranz
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Marina Breisch
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany
| | - Alexander Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Götz Westphal
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Jürgen Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Nadine Ziegler
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Bochum, Germany
| | - Alfred Ludwig
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Bochum, Germany
| | - Manfred Köller
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany
| | - Christina Sengstock
- BG University Hospital Bergmannsheil, Surgical Research, Ruhr University Bochum, Bochum, Germany.
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany.
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20
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Olejnik M, Kersting M, Rosenkranz N, Loza K, Breisch M, Rostek A, Prymak O, Schürmeyer L, Westphal G, Köller M, Bünger J, Epple M, Sengstock C. Cell-biological effects of zinc oxide spheres and rods from the nano- to the microscale at sub-toxic levels. Cell Biol Toxicol 2020; 37:573-593. [PMID: 33205376 PMCID: PMC8384809 DOI: 10.1007/s10565-020-09571-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/04/2020] [Indexed: 12/12/2022]
Abstract
Zinc oxide particles were synthesized in various sizes and shapes, i.e., spheres of 40-nm, 200-nm, and 500-nm diameter and rods of 40∙100 nm2 and 100∙400 nm2 (all PVP-stabilized and well dispersed in water and cell culture medium). Crystallographically, the particles consisted of the hexagonal wurtzite phase with a primary crystallite size of 20 to 100 nm. The particles showed a slow dissolution in water and cell culture medium (both neutral; about 10% after 5 days) but dissolved within about 1 h in two different simulated lysosomal media (pH 4.5 to 4.8). Cells relevant for respiratory exposure (NR8383 rat alveolar macrophages) were exposed to these particles in vitro. Viability, apoptosis, and cell activation (generation of reactive oxygen species, ROS, release of cytokines) were investigated in an in vitro lung cell model with respect to the migration of inflammatory cells. All particle types were rapidly taken up by the cells, leading to an increased intracellular zinc ion concentration. The nanoparticles were more cytotoxic than the microparticles and comparable with dissolved zinc acetate. All particles induced cell apoptosis, unlike dissolved zinc acetate, indicating a particle-related mechanism. Microparticles induced a stronger formation of reactive oxygen species than smaller particles probably due to higher sedimentation (cell-to-particle contact) of microparticles in contrast to nanoparticles. The effect of particle types on the cytokine release was weak and mainly resulted in a decrease as shown by a protein microarray. In the particle-induced cell migration assay (PICMA), all particles had a lower effect than dissolved zinc acetate. In conclusion, the biological effects of zinc oxide particles in the sub-toxic range are caused by zinc ions after intracellular dissolution, by cell-to-particle contacts, and by the uptake of zinc oxide particles into cells. Graphical headlights • The cytotoxicity of zinc oxide particles is mainly due to the intracellular release of zinc ions. • The size and shape of zinc oxide micro- and nanoparticles has only small effects on lung cells in the sub-toxic range. • Zinc oxide particles are rapidly taken up by cells, regardless of their size and shape. • Zinc oxide particles rapidly dissolve after cellular uptake in endolysosomes. ![]()
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Affiliation(s)
- M Olejnik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - M Kersting
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University Bochum, Bochum, Germany
| | - N Rosenkranz
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - K Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - M Breisch
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University Bochum, Bochum, Germany
| | - A Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - O Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - L Schürmeyer
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - G Westphal
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - M Köller
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University Bochum, Bochum, Germany
| | - J Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - M Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany.
| | - C Sengstock
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University Bochum, Bochum, Germany.
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21
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Sokolova V, Nzou G, van der Meer SB, Ruks T, Heggen M, Loza K, Hagemann N, Murke F, Giebel B, Hermann DM, Atala AJ, Epple M. Ultrasmall gold nanoparticles (2 nm) can penetrate and enter cell nuclei in an in vitro 3D brain spheroid model. Acta Biomater 2020; 111:349-362. [PMID: 32413579 DOI: 10.1016/j.actbio.2020.04.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/08/2020] [Accepted: 04/13/2020] [Indexed: 12/20/2022]
Abstract
The neurovascular unit (NVU) is a complex functional and anatomical structure composed of endothelial cells and their blood-brain barrier (BBB) forming tight junctions. It represents an efficient barrier for molecules and drugs. However, it also prevents a targeted transport for the treatment of cerebral diseases. The uptake of ultrasmall nanoparticles as potential drug delivery agents was studied in a three-dimensional co-culture cell model (3D spheroid) composed of primary human cells (astrocytes, pericytes, endothelial cells). Multicellular 3D spheroids show reproducible NVU features and functions. The spheroid core is composed mainly of astrocytes, covered with pericytes, while brain endothelial cells form the surface layer, establishing the NVU that regulates the transport of molecules. After 120 h cultivation, the cells self-assemble into a 350 µm spheroid as shown by confocal laser scanning microscopy. The passage of different types of fluorescent ultrasmall gold nanoparticles (core diameter 2 nm) both into the spheroid and into three constituting cell types was studied by confocal laser scanning microscopy. Three kinds of covalently fluorophore-conjugated gold nanoparticles were used: One with fluorescein (FAM), one with Cy3, and one with the peptide CGGpTPAAK-5,6-FAM-NH2. In 2D cell co-culture experiments, it was found that all three kinds of nanoparticles readily entered all three cell types. FAM- and Cy3-labelled nanoparticles were able to enter the cell nucleus as well. The three dissolved dyes alone were not taken up by any cell type. A similar situation evolved with 3D spheroids: The three kinds of nanoparticles entered the spheroid, but the dissolved dyes did not. The presence of a functional blood-brain barrier was demonstrated by adding histamine to the spheroids. In that case, the blood-brain barrier opened, and dissolved dyes like a FITC-labelled antibody and FITC alone entered the spheroid. In summary, our results qualify ultrasmall gold nanoparticles as suitable carriers for imaging or drug delivery into brain cells (sometimes including the nucleus), brain cell spheroids, and probably also into the brain. STATEMENT OF SIGNIFICANCE: 3D brain spheroid model and its permeability by ultrasmall gold nanoparticles. We demonstrate that ultrasmall gold nanoparticles can easily penetrate the constituting cells and sometimes even enter the cell nucleus. They can also enter the interior of the blood-brain barrier model. In contrast, small molecules like fluorescing dyes are not able to do that. Thus, ultrasmall gold nanoparticles can serve as carriers of drugs or for imaging inside the brain.
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Affiliation(s)
- Viktoriya Sokolova
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, 45117, Germany
| | - Goodwell Nzou
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, 27101, USA
| | - Selina B van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, 45117, Germany
| | - Tatjana Ruks
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, 45117, Germany
| | - Marc Heggen
- Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, 45117, Germany
| | - Nina Hagemann
- Chair of Vascular Neurology and Dementia, Department of Neurology, University Hospital Essen, University of Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Florian Murke
- Institute for Transfusion Medicine, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45122 Essen, Germany
| | - Bernd Giebel
- Institute for Transfusion Medicine, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45122 Essen, Germany
| | - Dirk M Hermann
- Chair of Vascular Neurology and Dementia, Department of Neurology, University Hospital Essen, University of Duisburg-Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - Anthony J Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, 27101, USA
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, 45117, Germany.
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22
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Sudradjat H, Meyer F, Loza K, Epple M, Enax J. In Vivo Effects of a Hydroxyapatite-Based Oral Care Gel on the Calcium and Phosphorus Levels of Dental Plaque. Eur J Dent 2020; 14:206-211. [PMID: 32283562 PMCID: PMC7274817 DOI: 10.1055/s-0040-1708456] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES Particulate hydroxyapatite (HAP; Ca5(PO4)3(OH)) is a biomimetic oral care ingredient. One mode of action in caries-susceptible individuals may be the adhesion/incorporation of HAP into dental plaque. Therefore, the aim of this in vivo study was to analyze the 3-day effects of a newly developed hydroxyapatite-based oral care gel on the calcium and phosphorus levels within the dental plaque of children. MATERIALS AND METHODS This study was conducted in Kebon Padangan at Bali in Indonesia. Thirty-four children (mean age, 8.9 years; mean DMF-T [decayed, missing, and filled teeth; permanent teeth], 0.6; mean dmft-t [primary teeth] 4.5) were included in the study. The gel was applied thrice for 3 days by an experienced dentist. Dental plaque was collected at baseline and after the study. Levels of calcium and phosphorus of plaque samples were analyzed by energy-dispersive X-ray spectroscopy. STATISTICAL ANALYSIS Medians for both calcium and phosphorus levels were calculated (baseline and 3-day application of HAP-gel). RESULTS The calcium level increased after 3 days of application of the HAP-gel from 0.25 wt% (median) to 0.40 wt% (median), while the phosphorus level increased from 1.17 wt% (median) to 1.41 wt% (median). However, variations in both calcium and phosphorus levels measured in the pooled dental plaque samples were high. CONCLUSION Within the limitations of the study, the 3-day application of the oral HAP-gel in children increased the median of both calcium and phosphorus levels in plaque. Consequently, a positive influence on the remineralization/demineralization process is very likely.
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Affiliation(s)
- Henny Sudradjat
- Department for Dentistry, Health Care Center, Braunschweig, Germany
| | - Frederic Meyer
- Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany
| | - Joachim Enax
- Research Department, Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany
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23
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Breisch M, Loza K, Pappert K, Rostek A, Rurainsky C, Tschulik K, Heggen M, Epple M, Tiller JC, Schildhauer TA, Köller M, Sengstock C. Enhanced dissolution of silver nanoparticles in a physical mixture with platinum nanoparticles based on the sacrificial anode effect. Nanotechnology 2020; 31:055703. [PMID: 31618711 DOI: 10.1088/1361-6528/ab4e48] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A strategy to reduce implant-related infections is the inhibition of the initial bacterial implant colonization by biomaterials containing silver (Ag). The antimicrobial efficacy of such biomaterials can be increased by surface enhancement (nanosilver) or by creating a sacrificial anode system for Ag. Such a system will lead to an electrochemically driven enhanced Ag ion release due to the presence of a more noble metal. Here we combined the enlarged surface of nanoparticles (NP) with a possible sacrificial anode effect for Ag induced by the presence of the electrochemically more noble platinum (Pt) in physical mixtures of Ag NP and Pt NP dispersions. These Ag NP/Pt NP mixtures were compared to the same amounts of pure Ag NP in terms of cell biological responses, i.e. the antimicrobial activity against Staphylococcus aureus and Escherichia coli as well as the viability of human mesenchymal stem cells (hMSC). In addition, Ag NP was analyzed by ultraviolet-visible (UV-vis) spectroscopy, cyclic voltammetry, and atomic absorption spectroscopy. It was found that the dissolution rate of Ag NP was enhanced in the presence of Pt NP within the physical mixture compared to a dispersion of pure Ag NP. Dissolution experiments revealed a fourfold increased Ag ion release from physical mixtures due to enhanced electrochemical activity, which resulted in a significantly increased toxicity towards both bacteria and hMSC. Thus, our results provide evidence for an underlying sacrificial anode mechanism induced by the presence of Pt NP within physical mixtures with Ag NP. Such physical mixtures have a high potential for various applications, for example as antimicrobial implant coatings in the biomedicine or as bactericidal systems for water and surface purification in the technical area.
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Affiliation(s)
- Marina Breisch
- BG University Hospital Bergmannsheil Bochum/Surgical Research, Ruhr University Bochum, Buerkle-de-la-Camp-Platz 1, D-44789 Bochum, Germany
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24
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Luebke A, Loza K, Prymak O, Dammann P, Fabritius HO, Epple M. Optimized biological tools: ultrastructure of rodent and bat teeth compared to human teeth. Bioinspired, Biomimetic and Nanobiomaterials 2019. [DOI: 10.1680/jbibn.19.00001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Enamel, the outer layer of the teeth of vertebrates, is the hardest tissue in their body. In general, enamel is highly mineralized and has a special ultrastructure that directs the mechanical properties of teeth and thereby their biological functions. However, there are differences between the enamel ultrastructures of different species. The authors compare the teeth of the Eurasian beaver Castor fiber, the African mole rat Fukomys kafuensis and the common pipistrelle bat Pipistrellus pipistrellus by high-resolution analytical methods, including scanning electron microscopy, quantitative wavelength-dispersive X-ray spectroscopy and X-ray powder diffraction. The enamel of all animals consists of long, thin and differently oriented calcium phosphate crystallites (length > 1 µm; thickness about 50 nm). On the outer surface of the beaver tooth, a thin layer of brown iron oxide was found. The diameter of the dentin tubuli was between 1 and 3 µm for all species – that is, comparable to that for human teeth.
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Affiliation(s)
- Alwina Luebke
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Essen, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Essen, Germany
| | - Philip Dammann
- Department of General Zoology, University of Duisburg-Essen, Essen, Germany; Central Animal Laboratory, University Clinics Essen, Essen, Germany
| | - Helge Otto Fabritius
- Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Essen, Germany
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25
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Pappert K, Loza K, Shviro M, Hagemann U, Heggen M, Dunin‐Borkowski RE, Schierholz R, Maeda T, Kaneko K, Epple M. Frontispiece: Nanoscopic Porous Iridium/Iridium Dioxide Superstructures (15 nm): Synthesis and Thermal Conversion by In Situ Transmission Electron Microscopy. Chemistry 2019. [DOI: 10.1002/chem.201984763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kevin Pappert
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-Essen Universitätsstr. 5–7 45117 Essen Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-Essen Universitätsstr. 5–7 45117 Essen Germany
| | - Meital Shviro
- Institute of Energy and Climate ResearchElectrochemical Process Engineering (IEK-3)Forschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Ulrich Hagemann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN) and Center for Nanointegration Duisburg-Essen (CENIDE)University of, Duisburg-Essen Carl-Benz-Strasse 199 47057 Duisburg Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with ElectronsForschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Rafal E. Dunin‐Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with ElectronsForschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Roland Schierholz
- Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9)Forschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Takuya Maeda
- Department of Materials Science and EngineeringKyushu University, 744 Motooka Nishi Fukuoka 819-0395 Japan
| | - Kenji Kaneko
- Department of Materials Science and EngineeringKyushu University, 744 Motooka Nishi Fukuoka 819-0395 Japan
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)University of Duisburg-Essen Universitätsstr. 5–7 45117 Essen Germany
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26
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Pappert K, Loza K, Shviro M, Hagemann U, Heggen M, Dunin-Borkowski RE, Schierholz R, Maeda T, Kaneko K, Epple M. Nanoscopic Porous Iridium/Iridium Dioxide Superstructures (15 nm): Synthesis and Thermal Conversion by In Situ Transmission Electron Microscopy. Chemistry 2019; 25:11048-11057. [PMID: 31140211 DOI: 10.1002/chem.201901623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Indexed: 11/05/2022]
Abstract
Porous particle superstructures of about 15 nm diameter, consisting of ultrasmall nanoparticles of iridium and iridium dioxide, are prepared through the reduction of sodium hexachloridoiridate(+IV) with sodium citrate/sodium borohydride in water. The water-dispersible porous particles contain about 20 wt % poly(N-vinylpyrrolidone) (PVP), which was added for colloidal stabilization. High-resolution transmission electron microscopy confirms the presence of both iridium and iridium dioxide primary particles (1-2 nm) in each porous superstructure. The internal porosity (≈58 vol%) is demonstrated by electron tomography. In situ transmission electron microscopy up to 1000 °C under oxygen, nitrogen, argon/hydrogen (all at 1 bar), and vacuum shows that the porous particles undergo sintering and subsequent compaction upon heating, a process that starts at around 250 °C and is completed at around 800 °C. Finally, well-crystalline iridium dioxide is obtained under all four environments. The catalytic activity of the as-prepared porous superstructures in electrochemical water splitting (oxygen evolution reaction; OER) is reduced considerably upon heating owing to sintering of the pores and loss of internal surface area.
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Affiliation(s)
- Kevin Pappert
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117, Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117, Essen, Germany
| | - Meital Shviro
- Institute of Energy and Climate Research, Electrochemical Process Engineering (IEK-3), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Ulrich Hagemann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN) and Center for Nanointegration Duisburg-Essen (CENIDE), University of, Duisburg-Essen, Carl-Benz-Strasse 199, 47057, Duisburg, Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Rafal E Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Roland Schierholz
- Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Takuya Maeda
- Department of Materials Science and Engineering, Kyushu University, 744, Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Kenji Kaneko
- Department of Materials Science and Engineering, Kyushu University, 744, Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, 45117, Essen, Germany
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27
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Breisch M, Grasmik V, Loza K, Pappert K, Rostek A, Ziegler N, Ludwig A, Heggen M, Epple M, Tiller JC, Schildhauer TA, Köller M, Sengstock C. Bimetallic silver-platinum nanoparticles with combined osteo-promotive and antimicrobial activity. Nanotechnology 2019; 30:305101. [PMID: 30959494 DOI: 10.1088/1361-6528/ab172b] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Bimetallic alloyed silver-platinum nanoparticles (AgPt NP) with different metal composition from Ag10Pt90 to Ag90Pt10 in steps of 20 mol% were synthesized. The biological effects of AgPt NP, including cellular uptake, cell viability, osteogenic differentiation and osteoclastogenesis as well as the antimicrobial activity towards Staphylococcus aureus and Escherichia coli were analyzed in comparison to pure Ag NP and pure Pt NP. The uptake of NP into human mesenchymal stem cells was confirmed by cross-sectional focused-ion beam preparation and observation by scanning and transmission electron microscopy in combination with energy-dispersive x-ray analysis. Lower cytotoxicity and antimicrobial activity were observed for AgPt NP compared to pure Ag NP. Thus, an enhanced Ag ion release due to a possible sacrificial anode effect was not achieved. Nevertheless, a Ag content of at least 50 mol% was sufficient to induce bactericidal effects against both Staphylococcus aureus and Escherichia coli. In addition, a Pt-related (≥50 mol% Pt) osteo-promotive activity on human mesenchymal stem cells was observed by enhanced cell calcification and alkaline phosphatase activity. In contrast, the osteoclastogenesis of rat primary precursor osteoclasts was inhibited. In summary, these results demonstrate a combinatory osteo-promotive and antimicrobial activity of bimetallic Ag50Pt50 NP.
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Affiliation(s)
- Marina Breisch
- BG University Hospital Bergmannsheil Bochum/Surgical Research, Ruhr University Bochum, Buerkle-de-la-Camp-Platz 1, D-44789 Bochum, Germany
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van der Meer SB, Loza K, Wey K, Heggen M, Beuck C, Bayer P, Epple M. Click Chemistry on the Surface of Ultrasmall Gold Nanoparticles (2 nm) for Covalent Ligand Attachment Followed by NMR Spectroscopy. Langmuir 2019; 35:7191-7204. [PMID: 31039607 DOI: 10.1021/acs.langmuir.9b00295] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ultrasmall gold nanoparticles (core diameter 2 nm) were surface-conjugated with azide groups by attaching the azide-functionalized tripeptide lysine(N3)-cysteine-asparagine with ∼117 molecules on each nanoparticle. A covalent surface modification with alkyne-containing molecules was then possible by copper-catalyzed click chemistry. The successful clicking to the nanoparticle surface was demonstrated with 13C-labeled propargyl alcohol. All steps of the nanoparticle surface conjugation were verified by extensive NMR spectroscopy on dispersed nanoparticles. The particle diameter and the dispersion state were assessed by high-resolution transmission electron microscopy (HRTEM), differential centrifugal sedimentation (DCS), and 1H-DOSY NMR spectroscopy. The clicking of fluorescein (FAM-alkyne) gave strongly fluorescing ultrasmall nanoparticles that were traced inside eukaryotic cells. The uptake of these nanoparticles after 24 h by HeLa cells was very efficient and showed that the nanoparticles even penetrated the nuclear membrane to a very high degree (in contrast to dissolved FAM-alkyne alone that did not enter the cell). About 8 fluorescein molecules were clicked to each nanoparticle.
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Affiliation(s)
- Selina Beatrice van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
| | - Karolin Wey
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
| | - Marc Heggen
- Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons , Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
| | - Christine Beuck
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB) , University of Duisburg-Essen , 45117 Essen , Germany
| | - Peter Bayer
- Department of Structural and Medicinal Biochemistry, Centre for Medical Biotechnology (ZMB) , University of Duisburg-Essen , 45117 Essen , Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE) , University of Duisburg-Essen , Universitätsstr. 5-7 , 45117 Essen , Germany
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Socrates R, Prymak O, Loza K, Sakthivel N, Rajaram A, Epple M, Narayana Kalkura S. Biomimetic fabrication of mineralized composite films of nanosilver loaded native fibrillar collagen and chitosan. Materials Science and Engineering: C 2019; 99:357-366. [DOI: 10.1016/j.msec.2019.01.101] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/17/2019] [Accepted: 01/22/2019] [Indexed: 12/11/2022]
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Chernozem RV, Surmeneva MA, Shkarina SN, Loza K, Epple M, Ulbricht M, Cecilia A, Krause B, Baumbach T, Abalymov AA, Parakhonskiy BV, Skirtach AG, Surmenev RA. Piezoelectric 3-D Fibrous Poly(3-hydroxybutyrate)-Based Scaffolds Ultrasound-Mineralized with Calcium Carbonate for Bone Tissue Engineering: Inorganic Phase Formation, Osteoblast Cell Adhesion, and Proliferation. ACS Appl Mater Interfaces 2019; 11:19522-19533. [PMID: 31058486 DOI: 10.1021/acsami.9b04936] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Elaboration of novel biocomposites providing simultaneously both biodegradability and stimulated bone tissue repair is essential for regenerative medicine. In particular, piezoelectric biocomposites are attractive because of a possibility to electrically stimulate cell response. In the present study, novel CaCO3-mineralized piezoelectric biodegradable scaffolds based on two polymers, poly[( R)3-hydroxybutyrate] (PHB) and poly[3-hydroxybutyrate- co-3-hydroxyvalerate] (PHBV), are presented. Mineralization of the scaffold surface is carried out by the in situ synthesis of CaCO3 in the vaterite and calcite polymorphs using ultrasound (U/S). Comparative characterization of PHB and PHBV scaffolds demonstrated an impact of the porosity and surface charge on the mineralization in a dynamic mechanical system, as no essential distinction was observed in wettability, structure, and surface chemical compositions. A significantly higher (4.3 times) piezoelectric charge and a higher porosity (∼15%) lead to a more homogenous CaCO3 growth in 3-D fibrous structures and result in a two times higher relative mass increase for PHB scaffolds compared to that for PHBV. This also increases the local ion concentration incurred upon mineralization under U/S-generated dynamic mechanical conditions. The modification of the wettability for PHB and PHBV scaffolds from hydrophobic (nonmineralized fibers) to superhydrophilic (mineralized fibers) led to a pronounced apatite-forming behavior of scaffolds in a simulated body fluid. In turn, this results in the formation of a dense monolayer of well-distributed and proliferated osteoblast cells along the fibers. CaCO3-mineralized PHBV surfaces had a higher osteoblast cell adhesion and proliferation assigned to a higher amount of CaCO3 on the surface compared to that on PHB scaffolds, as incurred from micro-computed tomography (μCT). Importantly, a cell viability study confirmed biocompatibility of all the scaffolds. Thus, hybrid biocomposites based on the piezoelectric PHB polymers represent an effective scaffold platform functionalized by an inorganic phase and stimulating the growth of the bone tissue.
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Affiliation(s)
- R V Chernozem
- Physical Materials Science and Composite Materials Centre , National Research Tomsk Polytechnic University , 634050 Tomsk , Russia
- Department of Biotechnology , Ghent University , 9000 Ghent , Belgium
| | - M A Surmeneva
- Physical Materials Science and Composite Materials Centre , National Research Tomsk Polytechnic University , 634050 Tomsk , Russia
| | - S N Shkarina
- Physical Materials Science and Composite Materials Centre , National Research Tomsk Polytechnic University , 634050 Tomsk , Russia
| | | | | | | | - A Cecilia
- Institute for Photon Science and Synchrotron Radiation (IPS) , Karlsruhe Institute of Technology , 76344 Eggenstein-Leopoldshafen , Germany
| | - B Krause
- Institute for Photon Science and Synchrotron Radiation (IPS) , Karlsruhe Institute of Technology , 76344 Eggenstein-Leopoldshafen , Germany
| | - T Baumbach
- Institute for Photon Science and Synchrotron Radiation (IPS) , Karlsruhe Institute of Technology , 76344 Eggenstein-Leopoldshafen , Germany
- Laboratory for Applications of Synchrotron Radiation (LAS) , Karlsruhe Institute of Technology (KIT) , 76049 Karlsruhe , Germany
| | - A A Abalymov
- Department of Biotechnology , Ghent University , 9000 Ghent , Belgium
| | - B V Parakhonskiy
- Department of Biotechnology , Ghent University , 9000 Ghent , Belgium
| | - A G Skirtach
- Department of Biotechnology , Ghent University , 9000 Ghent , Belgium
| | - R A Surmenev
- Physical Materials Science and Composite Materials Centre , National Research Tomsk Polytechnic University , 634050 Tomsk , Russia
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Ruks T, Beuck C, Schaller T, Niemeyer F, Zähres M, Loza K, Heggen M, Hagemann U, Mayer C, Bayer P, Epple M. Solution NMR Spectroscopy with Isotope-Labeled Cysteine ( 13C and 15N) Reveals the Surface Structure of l-Cysteine-Coated Ultrasmall Gold Nanoparticles (1.8 nm). Langmuir 2019; 35:767-778. [PMID: 30576151 DOI: 10.1021/acs.langmuir.8b03840] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Ultrasmall gold nanoparticles with a diameter of 1.8 nm were synthesized by reduction of tetrachloroauric acid with sodium borohydride in the presence of l-cysteine, with natural isotope abundance as well as 13C-labeled and 15N-labeled. The particle diameter was determined by high-resolution transmission electron microscopy and differential centrifugal sedimentation. X-ray photoelectron spectroscopy confirmed the presence of metallic gold with only a few percent of oxidized Au(+I) species. The surface structure and the coordination environment of the cysteine ligands on the ultrasmall gold nanoparticles were studied by a variety of homo- and heteronuclear NMR spectroscopic techniques including 1H-13C-heteronuclear single-quantum coherence and 13C-13C-INADEQUATE. Further information on the binding situation (including the absence of residual or detached l-cysteine in the solution) and on the nanoparticle diameter (indicating the well-dispersed state) was obtained by diffusion-ordered spectroscopy (1H-, 13C-, and 1H-13C-DOSY). Three coordination environments of l-cysteine on the gold surface were identified that were ascribed to different crystallographic sites, supported by geometric considerations of the nanoparticle ultrastructure. The particle size data and the NMR-spectroscopic analysis gave a particle composition of about Au174(cysteine)67.
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Affiliation(s)
| | | | | | | | | | | | - Marc Heggen
- Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons , Forschungszentrum Jülich GmbH , 52428 Jülich , Germany
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Chudinova E, Surmeneva M, Koptyug A, Loza K, Prymak O, Epple M, Surmenev R. Surface modification of Ti6Al4V alloy scaffolds manufactured by electron beam melting. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1742-6596/1145/1/012030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rostek A, Loza K, Heggen M, Epple M. X-ray powder diffraction to analyse bimetallic core–shell nanoparticles (gold and palladium; 7–8 nm). RSC Adv 2019; 9:26628-26636. [PMID: 35528588 PMCID: PMC9070422 DOI: 10.1039/c9ra05117a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 08/13/2019] [Indexed: 01/17/2023] Open
Abstract
A comparative X-ray powder diffraction study on poly(N-vinyl pyrrolidone) (PVP)-stabilized palladium and gold nanoparticles and bimetallic Pd–Au nanoparticles (both types of core–shell nanostructures) was performed.
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Affiliation(s)
- A. Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
| | - K. Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
| | - M. Heggen
- Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons
- Forschungszentrum Jülich GmbH
- Germany
| | - M. Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
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Chudinova EA, Surmeneva MA, Timin AS, Karpov TE, Wittmar A, Ulbricht M, Ivanova A, Loza K, Prymak O, Koptyug A, Epple M, Surmenev RA. Adhesion, proliferation, and osteogenic differentiation of human mesenchymal stem cells on additively manufactured Ti6Al4V alloy scaffolds modified with calcium phosphate nanoparticles. Colloids Surf B Biointerfaces 2018; 176:130-139. [PMID: 30597410 DOI: 10.1016/j.colsurfb.2018.12.047] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/03/2018] [Accepted: 12/17/2018] [Indexed: 10/27/2022]
Abstract
In the present study, biocomposites based on 3D porous additively manufactured Ti6Al4V (Ti64) scaffolds modified with biocompatible calcium phosphate nanoparticles (CaPNPs) were investigated. Ti64 scaffolds were manufactured via electron beam melting technology using an Arcam machine. Electrophoretic deposition was used to modify the scaffolds with CaPNPs, which were synthesized by precipitation in the presence of polyethyleneimine (PEI). Dynamic light scattering revealed that the CaP/PEI nanoparticles had an average size of 46 ± 18 nm and a zeta potential of +22 ± 9 mV. Scanning electron microscopy (SEM) revealed that the obtained spherical CaPNPs had an average diameter of approximately 90 nm. The titanium-based scaffolds coated with CaPNPs exhibited improved hydrophilic surface properties, with a water contact angle below 5°. Cultivation of human mesenchymal stem cells (hMSCs) on the CaPNPs-coated Ti64 scaffolds indicated that the improved hydrophilicity was beneficial for the attachment and growth of cells in vitro. The Ti6Al4V/CaPNPs scaffold supported an increase in the alkaline phosphatase (ALP) activity of cells. In addition to the favourable cell proliferation and differentiation, Ti6Al4V/CaPNPs scaffolds displayed increased mineralization compared to non-coated Ti6Al4V scaffolds. Thus, the developed composite 3D scaffolds of Ti6Al4V functionalized with CaPNPs are promising materials for different applications related to bone repair.
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Affiliation(s)
- Ekaterina A Chudinova
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Lenin Avenue, 30, 634050, Tomsk, Russian Federation
| | - Maria A Surmeneva
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Lenin Avenue, 30, 634050, Tomsk, Russian Federation.
| | - Alexander S Timin
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Lenin Avenue, 30, 634050, Tomsk, Russian Federation; First I. P. Pavlov State Medical University of St. Petersburg, Lev Tolstoy str., 6/8, 197022, St. Petersburg, Russian Federation.
| | - Timofey E Karpov
- Department of Molecular Biology, Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251, St. Petersburg, Russian Federation
| | - Alexandra Wittmar
- Technical Chemistry II and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr, 5-7, 45117 Essen, Germany
| | - Mathias Ulbricht
- Technical Chemistry II and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr, 5-7, 45117 Essen, Germany
| | - Anna Ivanova
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Lenin Avenue, 30, 634050, Tomsk, Russian Federation
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr, 5-7, 45117 Essen, Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr, 5-7, 45117 Essen, Germany
| | - Andrey Koptyug
- Sports Tech Research Centre, Department of Quality Technology and Mechanical Engineering, Mid Sweden University, Akademigatan 1, SE-831 25, Östersund, Sweden
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr, 5-7, 45117 Essen, Germany
| | - Roman A Surmenev
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, Lenin Avenue, 30, 634050, Tomsk, Russian Federation.
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Rostek A, Breisch M, Pappert K, Loza K, Heggen M, Köller M, Sengstock C, Epple M. Comparative biological effects of spherical noble metal nanoparticles (Rh, Pd, Ag, Pt, Au) with 4-8 nm diameter. Beilstein J Nanotechnol 2018; 9:2763-2774. [PMID: 30498649 PMCID: PMC6244119 DOI: 10.3762/bjnano.9.258] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 10/10/2018] [Indexed: 05/30/2023]
Abstract
For a comparative cytotoxicity study, nanoparticles of the noble metals Rh, Pd, Ag, Pt, and Au (spherical, average diameter 4 to 8 nm) were prepared by reduction in water and colloidally stabilized with poly(N-vinyl pyrrolidone) (PVP). Thus, their shape, size, and surface functionalization were all the same. Size and morphology of the nanoparticles were determined by dynamic light scattering (DLS), analytical disc centrifugation (differential centrifugal sedimentation, DCS), and high-resolution transmission electron microscopy (HRTEM). Cell-biological experiments were performed to determine the effect of particle exposure on the viability of human mesenchymal stem cells (hMSCs). Except for silver, no adverse effect of any of the metal nanoparticles was observed for concentrations up to 50 ppm (50 mg L-1) incubated for 24 h, indicating that noble metal nanoparticles (rhodium, palladium, platinum, gold) that do not release ions are not cytotoxic under these conditions.
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Affiliation(s)
- Alexander Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
| | - Marina Breisch
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum, Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Kevin Pappert
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
| | - Marc Heggen
- Ernst Ruska-Center and Peter Gruenberg Institute, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum, Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University of Bochum, Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, D-45117 Essen, Germany. ; Tel: +49 201 1832402; E-mail:
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Sokolova V, Loza K, Knuschke T, Heinen-Weiler J, Jastrow H, Hasenberg M, Buer J, Westendorf A, Gunzer M, Epple M. A systematic electron microscopic study on the uptake of barium sulphate nano-, submicro-, microparticles by bone marrow-derived phagocytosing cells. Acta Biomater 2018; 80:352-363. [PMID: 30240952 DOI: 10.1016/j.actbio.2018.09.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 09/13/2018] [Accepted: 09/17/2018] [Indexed: 01/15/2023]
Abstract
Nanoparticles can act as transporters for synthetic molecules and biomolecules into cells, also in immunology. Antigen-presenting cells like dendritic cells are important targets for immunotherapy in nanomedicine. Therefore, we have used primary murine bone marrow-derived phagocytosing cells (bmPCs), i.e. dendritic cells and macrophages, to study their interaction with spherical barium sulphate particles of different size (40 nm, 420 nm, and 1 µm) and to follow their uptake pathway. Barium sulphate is chemically and biologically inert (no dissolution, no catalytic effects), i.e. we can separate the particle uptake effect from potential biological reactions. The colloidal stabilization of the nanoparticles was achieved by a layer of carboxymethylcellulose (CMC) which is biologically inert and gives the particles a negative zeta potential (i.e. charge). The particles were made fluorescent by conjugating 6-aminofluoresceine to CMC. Their uptake was visualized by flow cytometry, confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and correlative light and electron microscopy (CLEM). Barium sulphate particles of all sizes were readily taken up by dendritic cells and even more by macrophages, with the uptake increasing with time and particle concentration. They were mainly localized inside phagosomes, heterophagosomes, and in the case of nanoparticles also in the nearby cytosol. No particles were found in the nucleus. In nanomedicine, inorganic nanoparticles from the nanometer to the micrometer size are therefore well suited as transporters of biomolecules, including antigens, into dendritic cells and macrophages. The presented model system may also serve to describe the aseptic loosening of endoprostheses caused by abrasive wear of inert particles and the subsequent cell reaction, a question which relates to the field of nanotoxicology. STATEMENT OF SIGNIFICANCE: The interaction of particles and cells is at the heart of nanomedicine and nanotoxicology, including abrasive wear from endoprostheses. It also comprises the immunological reaction to different kinds of nanomaterials, triggered by an immune response, e.g. by antigen-presenting cells. However, it is often difficult to separate the particle effect from a chemical or biochemical reaction to particles or their cargo. We show how chemically inert barium sulphate particles with three different sizes (nano, sub-micro, and micro) interact with relevant immune cells (primary dendritic cells and macrophages). Particles of all three sizes are readily taken up into both cell types by phagocytosis, but the uptake by macrophages is significantly more prominent than that by dendritic cells. The cells take up particles until they are virtually stuffed, but without direct adverse effect. The uptake increases with time and particle concentration. Thus, we have an ideal model system to follow particles into and inside cells without the side effect of a chemical particle effect, e.g. by degradation or ion release.
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Loza K, Epple M. Silver nanoparticles in complex media: an easy procedure to discriminate between metallic silver nanoparticles, reprecipitated silver chloride, and dissolved silver species. RSC Adv 2018; 8:24386-24391. [PMID: 35539215 PMCID: PMC9082037 DOI: 10.1039/c8ra04500c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 07/01/2018] [Indexed: 02/05/2023] Open
Abstract
Silver nanoparticles undergo oxidative dissolution in water upon storage. This occurs in pure water as well as in more complex media, including natural environments, biological tissues, and cell culture media. However, the dissolution leads to the reprecipitation of silver chloride as chloride is present in almost all relevant environments. The discrimination between dissolved silver species (ions and silver complexes) and dispersed (solid) species does not take this into account because all solid species (metallic silver and silver chloride) are isolated together. By applying a chemical separation procedure, we show that it is possible to quantify silver, silver chloride, and dissolved silver species after immersion into a typical cell culture medium (DMEM + 10% FCS). During the dissolution of metallic silver nanoparticles, about half of the dissolved silver is reprecipitated as solid silver chloride, i.e. the mere analysis of the soluble silver species does not reflect the true situation. The separation protocol is suitable for all chloride-containing media in the presence or in the absence of biomolecules.
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Affiliation(s)
- Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen Universitaetsstr. 5-7 45117 Essen Germany
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Grasmik V, Rurainsky C, Loza K, Evers MV, Prymak O, Heggen M, Tschulik K, Epple M. Cover Feature: Deciphering the Surface Composition and the Internal Structure of Alloyed Silver-Gold Nanoparticles (Chem. Eur. J. 36/2018). Chemistry 2018. [DOI: 10.1002/chem.201801307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Viktoria Grasmik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
| | - Christian Rurainsky
- Micro- & Nano-Electrochemistry and Center for Electrochemical Sciences (CES), ZEMOS 1.45; Ruhr-University Bochum; 44801 Bochum Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
| | - Mathies V. Evers
- Micro- & Nano-Electrochemistry and Center for Electrochemical Sciences (CES), ZEMOS 1.45; Ruhr-University Bochum; 44801 Bochum Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
| | - Marc Heggen
- Ernst Ruska-Centre and Peter Grünberg Institute; Forschungszentrum Jülich GmbH; 52425 Jülich Germany
| | - Kristina Tschulik
- Micro- & Nano-Electrochemistry and Center for Electrochemical Sciences (CES), ZEMOS 1.45; Ruhr-University Bochum; 44801 Bochum Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
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Grasmik V, Rurainsky C, Loza K, Evers MV, Prymak O, Heggen M, Tschulik K, Epple M. Deciphering the Surface Composition and the Internal Structure of Alloyed Silver-Gold Nanoparticles. Chemistry 2018. [DOI: 10.1002/chem.201800579] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Viktoria Grasmik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
| | - Christian Rurainsky
- Micro- & Nano-Electrochemistry and Center for Electrochemical Sciences (CES), ZEMOS 1.45; Ruhr-University Bochum; 44801 Bochum Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
| | - Mathies V. Evers
- Micro- & Nano-Electrochemistry and Center for Electrochemical Sciences (CES), ZEMOS 1.45; Ruhr-University Bochum; 44801 Bochum Germany
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
| | - Marc Heggen
- Ernst Ruska-Centre and Peter Grünberg Institute; Forschungszentrum Jülich GmbH; 52425 Jülich Germany
| | - Kristina Tschulik
- Micro- & Nano-Electrochemistry and Center for Electrochemical Sciences (CES), ZEMOS 1.45; Ruhr-University Bochum; 44801 Bochum Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstr. 5-7 45117 Essen Germany
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40
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Rostek A, Breisch M, Loza K, Garcia PRAF, Oliveira CLP, Prymak O, Heggen M, Köller M, Sengstock C, Epple M. Wet-Chemical Synthesis of Pd-Au Core-Shell Nanoparticles (8 nm): From Nanostructure to Biological Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201800638] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander Rostek
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
| | - Marina Breisch
- Bergmannsheil University Hospital/Surgical Research; Ruhr-University of Bochum; Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
| | - Paulo R. A. F. Garcia
- Institute of Physics; University of São Paulo; Rua do Matão 1371, São Paulo São Paulo 05314-970 Brazil
| | - Cristiano L. P. Oliveira
- Institute of Physics; University of São Paulo; Rua do Matão 1371, São Paulo São Paulo 05314-970 Brazil
| | - Oleg Prymak
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
| | - Marc Heggen
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons; Forschungszentrum Jülich GmbH; 52425 Jülich Germany
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research; Ruhr-University of Bochum; Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research; Ruhr-University of Bochum; Bürkle-de-la-Camp-Platz 1 44789 Bochum Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE); University of Duisburg-Essen; Universitaetsstr. 7 45141 Essen Germany
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41
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Grasmik V, Breisch M, Loza K, Heggen M, Köller M, Sengstock C, Epple M. Synthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys. RSC Adv 2018; 8:38582-38590. [PMID: 35559054 PMCID: PMC9090574 DOI: 10.1039/c8ra06461j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/11/2018] [Indexed: 12/17/2022] Open
Abstract
Bimetallic nanoparticles consisting of silver and platinum were prepared by a modified seeded-growth process in water in the full composition range in steps of 10 mol%. The particles had diameters between 15–25 nm as determined by disc centrifugal sedimentation (DCS) and transmission electron microscopy (TEM). Whereas particles with high platinum content were mostly spherical with a solid silver core/platinum shell structure, mostly hollow alloyed nanoparticles were observed with increasing silver content. The internal structure and the elemental distribution within the particles were elucidated by high-resolution transmission electron microscopy (HRTEM) in combination with energy-dispersive X-ray spectroscopy (EDX). The particles were cytotoxic for human mesenchymal stem cells (hMSC) above 50 mol% silver. This was explained by dissolution experiments where silver was only released at and above 50 mol% silver. In contrast, platinum-rich particles (less than 50 mol% silver) did not release any silver ions. This indicates that the presence of platinum inhibits the oxidative dissolution of silver. Bimetallic nanoparticles consisting of silver and platinum were prepared by a modified seeded-growth process in water in the full composition range in steps of 10 mol%.![]()
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Affiliation(s)
- Viktoria Grasmik
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- Universitaetsstr. 5-7
- 45117 Essen
- Germany
| | - Marina Breisch
- Bergmannsheil University Hospital/Surgical Research
- Ruhr-University of Bochum
- 44789 Bochum
- Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- Universitaetsstr. 5-7
- 45117 Essen
- Germany
| | - Marc Heggen
- Ernst Ruska-Center and Peter Gruenberg Institute
- Forschungszentrum Juelich GmbH
- Germany
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research
- Ruhr-University of Bochum
- 44789 Bochum
- Germany
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research
- Ruhr-University of Bochum
- 44789 Bochum
- Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- Universitaetsstr. 5-7
- 45117 Essen
- Germany
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42
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Prymak O, Loza K, Grasmik V, Pappert K, Rostek A, Helmlinger J, Gocyla M, Heggen M, Epple M. Crystallographic investigation of metallic and bimetallic nanoparticles. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317092178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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43
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Zimmermann S, Ruchter N, Loza K, Epple M, Sures B. Nanoparticulate versus ionic silver: Behavior in the tank water, bioaccumulation, elimination and subcellular distribution in the freshwater mussel Dreissena polymorpha. Environ Pollut 2017; 222:251-260. [PMID: 28034561 DOI: 10.1016/j.envpol.2016.12.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 06/06/2023]
Abstract
Zebra mussels (Dreissena polymorpha) were exposed to polyvinylpyrrolidone (PVP)-coated silver nanoparticles (AgNP; hydrodynamic diameter 80 nm; solid diameter 50 nm) to investigate the behavior of Ag in the tank water with respect to its uptake, bioaccumulation, elimination and subcellular distribution in the mussel soft tissue. Parallel experiments were performed with ionic Ag (AgNO3) to unravel possible differences between the metal forms. The recovery of the applied Ag concentration (500 μg/L) in the tank water was clearly affected by the metal source (AgNP < AgNO3) and water type (reconstituted water < tap water). Filtration (<0.45 μm) of water samples showed different effects on the quantified metal concentration depending on the water type and Ag form. Ag accumulation in the mussel soft tissue was neither influenced by the metal source nor by the water type. Ag concentrations in the mussel soft tissue did not decrease during 14 days of depuration. For both metal forms the Ag distribution within different subcellular fractions, i.e. metal-rich granules (MRG), cellular debris, organelles, heat-sensitive proteins (HSP) and metallothionein-like proteins (MTLP), revealed time-dependent changes which can be referred to intracellular Ag translocation processes. The results provide clear evidence for the uptake of Ag by the mussel soft tissue in nanoparticulate as well as in ionic form. Thus, zebra mussels could be used as effective accumulation indicators for environmental monitoring of both Ag forms.
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Affiliation(s)
- Sonja Zimmermann
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany.
| | - Nadine Ruchter
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany
| | - Bernd Sures
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitaetsstr. 5, 45141 Essen, Germany
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44
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Zyman Z, Epple M, Goncharenko A, Rokhmistrov D, Prymak O, Loza K. Peculiarities in thermal evolution of precipitated amorphous calcium phosphates with an initial Ca/P ratio of 1:1. J Mater Sci Mater Med 2017; 28:52. [PMID: 28197825 DOI: 10.1007/s10856-016-5820-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Accepted: 11/26/2016] [Indexed: 06/06/2023]
Abstract
Thermal evolution of amorphous calcium phosphate (ACP) powder from a fast nitrate synthesis with a Ca/P ratio of 1:1 were studied in the range of 20-980 °C. The powder consisted of amorphous dicalcium phosphate anhydrate (CaHPO4) after heating to 200 °C. CaHPO4 gradually condensed to amorphous calcium pyrophosphate Ca2P2O7 (CPP) between 200 to 620 °C. Amorphous CPP crystallized at 620-740 °C to a metastable polymorph α'-CPP of the high-temperature phase α-CPP and β-CPP. The α'-CPP/ β-CPP phase ratio reached a maximum at 800 °C (60 wt% α'-CPP/40 wt% β-CPP), and α'-CPP gradually transformed to β-CPP at a higher temperature. Some β-TCP occurred at 900 °C, so that a three-phasic mixture was obtained in the powder heated to 980 °C. The occurrence of metastable α'-CPP is attributed to Ostwald's step rule, and a mechanism for β-TCP formation is proposed. The advantages of prospective biomaterials from these powders are discussed.
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Affiliation(s)
- Zoltan Zyman
- Physics of Solids Department, V.N. Karazin Kharkiv National University, 4 Svoboda Sq., Kharkiv, 61022, Ukraine.
| | - Matthias Epple
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg- Essen, Essen, Germany
| | - Anton Goncharenko
- Physics of Solids Department, V.N. Karazin Kharkiv National University, 4 Svoboda Sq., Kharkiv, 61022, Ukraine
| | - Dmytro Rokhmistrov
- Physics of Solids Department, V.N. Karazin Kharkiv National University, 4 Svoboda Sq., Kharkiv, 61022, Ukraine
| | - Oleg Prymak
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg- Essen, Essen, Germany
| | - Kateryna Loza
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg- Essen, Essen, Germany
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Luebke A, Loza K, Patnaik R, Enax J, Raabe D, Prymak O, Fabritius HO, Gaengler P, Epple M. Reply to the ‘Comments on “Dental lessons from past to present: ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks”’ by H. Botella et al., RSC Adv., 2016, 6, 74384–74388. RSC Adv 2017. [DOI: 10.1039/c6ra27121a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The structure and composition of 13 fossilized tooth and bone samples aged between 3 and 70 million years were analysed.
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Affiliation(s)
- A. Luebke
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
| | - K. Loza
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
| | - R. Patnaik
- Centre of Advanced Study in Geology
- Panjab University
- Chandigarh 160014
- India
| | - J. Enax
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
| | - D. Raabe
- Microstructure Physics and Alloy Design
- Max-Planck-Institut für Eisenforschung
- 40237 Düsseldorf
- Germany
| | - O. Prymak
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
| | - H.-O. Fabritius
- Microstructure Physics and Alloy Design
- Max-Planck-Institut für Eisenforschung
- 40237 Düsseldorf
- Germany
| | - P. Gaengler
- ORMED
- Institute for Oral Medicine at the University of Witten/Herdecke
- 58448 Witten
- Germany
| | - M. Epple
- Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- University of Duisburg-Essen
- 45117 Essen
- Germany
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Schremmer I, Brik A, Weber D, Rosenkranz N, Rostek A, Loza K, Brüning T, Johnen G, Epple M, Bünger J, Westphal G. Kinetics of chemotaxis, cytokine, and chemokine release of NR8383 macrophages after exposure to inflammatory and inert granular insoluble particles. Toxicol Lett 2016; 263:68-75. [DOI: 10.1016/j.toxlet.2016.08.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/17/2016] [Accepted: 08/19/2016] [Indexed: 01/24/2023]
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Loza K, Föhring I, Bünger J, Westphal GA, Köller M, Epple M, Sengstock C. Barium sulfate micro- and nanoparticles as bioinert reference material in particle toxicology. Nanotoxicology 2016; 10:1492-1502. [DOI: 10.1080/17435390.2016.1235740] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany,
| | - Isabell Föhring
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany, and
| | - Jürgen Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany, and
| | - Götz A. Westphal
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany, and
| | - Manfred Köller
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University Bochum, Bochum, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, Germany,
| | - Christina Sengstock
- Bergmannsheil University Hospital/Surgical Research, Ruhr-University Bochum, Bochum, Germany
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Ahlberg S, Rancan F, Epple M, Loza K, Höppe D, Lademann J, Vogt A, Kleuser B, Gerecke C, Meinke MC. Comparison of different methods to study effects of silver nanoparticles on the pro- and antioxidant status of human keratinocytes and fibroblasts. Methods 2016; 109:55-63. [PMID: 27215495 DOI: 10.1016/j.ymeth.2016.05.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 05/19/2016] [Accepted: 05/20/2016] [Indexed: 11/16/2022] Open
Abstract
In times of antibiotic-resistant bacteria new strategies to avoid the septic-inducing threat of dangerous microorganisms are needed. Silver ions (Ag+) in the forms of silver nitrate or silver sulfadiazine have been used as antimicrobial agents for years. A step further was the development of micro and silver particles (AgNP). In contrast to other Ag+ ion sources, AgNP allow a sustained release of Ag+ ions, due to their high surface to volume ratio. However, AgNP are also toxic to eukaryotic cells and the mechanisms of cytotoxicity have not yet been fully elucidated. In this study, the impact of different AgNP preparations on a human keratinocyte cell line was investigated. The intracellular radical formation was confirmed by the 2',7'-dichlorodihydrofluorescein di-acetate (H2DCF-DA) assay on two cell types (HaCaT cells and normal human dermal fibroblasts) as well as by electron paramagnetic resonance (EPR) spectroscopy, which showed comparable results. EPR spectroscopy was performed for the first time for 24h in experiments using keratinocytes. Drastic changes in the mitochondrial activity were induced in cells incubated with AgNP containing high concentrations of Ag+ ions. It was also possible to show that the quantitative uptake of AgNP was dependent on the AgNP concentration. In addition, the effects of AgNP on the GSH/GSSG system were elucidated. The results showed a batch- and concentration-dependent decrease of the total glutathione concentration which correlated well with the decrease of cell viability. Furthermore, the results suggest a direct reaction of GSH molecules with Ag+ ions. In conclusion, this study proves the efficacy of the H2DCF-DA assay and the EPR spectroscopy. The investigations show that AgNP formulations containing high amounts of released Ag+ ions induce radicals in human keratinocytes and deplete them of their natural anti-oxidative molecules. On the contrary, nanoparticles prepared and stored under argon did not induce significant adverse effects, suggesting that slowing down the release of Ag+ may help to reduce AgNP-related side effects without affecting the antibacterial impact.
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Affiliation(s)
- Sebastian Ahlberg
- Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Fiorenza Rancan
- Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Essen, Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Essen, Germany
| | - David Höppe
- Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jürgen Lademann
- Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Annika Vogt
- Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Burkhard Kleuser
- Department of Toxicology, Institute of Nutritional Science, University of Potsdam, Nuthetal, Germany
| | - Christian Gerecke
- Department of Toxicology, Institute of Nutritional Science, University of Potsdam, Nuthetal, Germany
| | - Martina C Meinke
- Department of Dermatology, Venerology and Allergology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
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Sharonova A, Loza K, Surmeneva M, Surmenev R, Prymak O, Epple M. Synthesis of positively and negatively charged silver nanoparticles and their deposition on the surface of titanium. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1757-899x/116/1/012009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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50
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Schuetze B, Mayer C, Loza K, Gocyla M, Heggen M, Epple M. Conjugation of thiol-terminated molecules to ultrasmall 2 nm-gold nanoparticles leads to remarkably complex 1H-NMR spectra. J Mater Chem B 2016; 4:2179-2189. [DOI: 10.1039/c5tb02443a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanoparticles, functionalized by aliphatic and aromatic mercapto-functionalized carboxylic acids and by two small peptides (CG and CGGRGD), respectively, were synthesized by the reduction of HAuCl4 with NaBH4 in the presence of the above ligands.
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Affiliation(s)
- Benjamin Schuetze
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
| | - Christian Mayer
- Physical Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
| | - Kateryna Loza
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
| | - Martin Gocyla
- Ernst Ruska-Center and Peter Gruenberg Institute
- Forschungszentrum Juelich GmbH
- 52425 Juelich
- Germany
| | - M. Heggen
- Ernst Ruska-Center and Peter Gruenberg Institute
- Forschungszentrum Juelich GmbH
- 52425 Juelich
- Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE)
- 45117 Essen
- Germany
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