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Vela L, Villacorta A, Venus T, Estrela-Lopis I, Pastor S, García-Rodriguez A, Rubio L, Marcos R, Hernández A. The potential effects of in vitro digestion on the physicochemical and biological characteristics of polystyrene nanoplastics. Environ Pollut 2023; 329:121656. [PMID: 37075918 DOI: 10.1016/j.envpol.2023.121656] [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] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 04/12/2023] [Accepted: 04/15/2023] [Indexed: 05/03/2023]
Abstract
The presence of plastic waste in our environment has continued growing and become an important environmental concern. Because of its degradation into micro- and nanoplastics (MNPLs), MNPLs are becoming environmental pollutants of special environmental/health concern. Since ingestion is one of the main exposure routes to MNPLs, the potential effects of digestion on the physicochemical/biological characteristics of polystyrene nanoplastics (PSNPLs) were determined. The results indicated a high tendency of digested PSNPLs to agglomerate and a differential presence of proteins on their surface. Interestingly, digested PSNPLs showed greater cell uptake than undigested PSNPLs in all three tested cell lines (TK6, Raji-B, and THP-1). Despite these differences in cell uptake, no differences in toxicity were observed except for high and assumed unrealistic exposures. When oxidative stress and genotoxicity induction were determined, the low effects observed after exposure to undigested PDNPLs were not observed in the digested ones. This indicated that the greater ability of digested PSNPLs to internalize was not accompanied by a greater hazard. This type of analysis should be performed with other MNPLs of varying sizes and chemical compositions.
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Affiliation(s)
- Lourdes Vela
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain; Facultad de Ciencias de La Salud, Eugenio Espejo. Universidad UTE, Avenida Occidental y Mariana de Jesús, Quito, Ecuador
| | - Aliro Villacorta
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain; Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Iquique, Chile
| | - Tom Venus
- Institute of Medical Physics and Biophysics, University of Leipzig, 04107, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, University of Leipzig, 04107, Leipzig, Germany
| | - Susana Pastor
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain
| | - Alba García-Rodriguez
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain
| | - Laura Rubio
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain; Nanobiology Laboratory, Department of Natural and Exact Sciences, Pontificia Universidad Católica Madre y Maestra, PUCMM, Santiago de Los Caballeros, Dominican Republic
| | - Ricard Marcos
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain.
| | - Alba Hernández
- Group of Mutagenesis, Department of Genetics and Microbiology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, Spain
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Rhode P, Mehdorn M, Lyros O, Kahlert C, Kurth T, Venus T, Schierle K, Estrela-Lopis I, Jansen-Winkeln B, Lordick F, Gockel I, Thieme R. Characterization of Total RNA, CD44, FASN, and PTEN mRNAs from Extracellular Vesicles as Biomarkers in Gastric Cancer Patients. Cancers (Basel) 2021; 13:cancers13235975. [PMID: 34885085 PMCID: PMC8656496 DOI: 10.3390/cancers13235975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Liquid biopsy is an easily accessible and non-invasive method to gain information about tumor diseases. The purpose of our study was to determine the value of extracellular vesicle-derived mRNAs as biomarkers for the diagnosis of gastric cancer and the response to its treatment. In a cohort of 87 gastric cancer patients and a control group of 14 individuals, we analyzed the absolute RNA concentration from extracellular vesicles (EV) and the relative levels of FASN, PTEN, and CD44 mRNA, and their correlation with clinico-pathological features. These correlated with treatment, tumor grading, and the pathological subtype according to Laurén’s classification. This might reflect their potential as both diagnostic and therapeutic predictors. Abstract In-depth characterization has introduced new molecular subtypes of gastric cancer (GC). To identify these, new approaches and techniques are required. Liquid biopsies are trendsetting and provide an easy and feasible method to identify and to monitor GC patients. In a prospective cohort of 87 GC patients, extracellular vesicles (EVs) were isolated from 250 µL of plasma. The total RNA was isolated with TRIZOL. The total RNA amount and the relative mRNA levels of CD44, PTEN, and FASN were measured by qRT-PCR. The isolation of EVs and their contained mRNA was possible in all 87 samples investigated. The relative mRNA levels of PTEN were higher in patients already treated by chemotherapy than in chemo-naïve patients. In patients who had undergone neoadjuvant chemotherapy followed by gastrectomy, a decrease in the total RNA amount was observed after neoadjuvant chemotherapy and gastrectomy, while FASN and CD44 mRNA levels decreased only after gastrectomy. The amount of RNA and the relative mRNA levels of FASN and CD44 in EVs were affected more significantly by chemotherapy and gastrectomy than by chemotherapy alone. Therefore, they are a potential biomarker for monitoring treatment response. Future analyses are needed to identify GC-specific key RNAs in EVs, which could be used for the diagnosis of gastric cancer patients in order to determine their molecular subtype and to accompany the therapeutic response.
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Affiliation(s)
- Philipp Rhode
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, D-04103 Leipzig, Germany; (P.R.); (M.M.); (O.L.); (B.J.-W.); (I.G.)
| | - Matthias Mehdorn
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, D-04103 Leipzig, Germany; (P.R.); (M.M.); (O.L.); (B.J.-W.); (I.G.)
| | - Orestis Lyros
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, D-04103 Leipzig, Germany; (P.R.); (M.M.); (O.L.); (B.J.-W.); (I.G.)
| | - Christoph Kahlert
- Department for Visceral, Thoracic and Vascular Surgery, University Hospital Carl Gustav Carus, D-01307 Dresden, Germany;
| | - Thomas Kurth
- Center for Molecular and Cellular Bioengineering (CMCB), Technology Platform, Technische Universität Dresden, D-01307 Dresden, Germany;
| | - Tom Venus
- Institute of Medical Physics and Biophysics, University of Leipzig, D-0407 Leipzig, Germany; (T.V.); (I.E.-L.)
| | - Katrin Schierle
- Institute of Pathology, University Hospital Leipzig, D-04103 Leipzig, Germany;
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, University of Leipzig, D-0407 Leipzig, Germany; (T.V.); (I.E.-L.)
| | - Boris Jansen-Winkeln
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, D-04103 Leipzig, Germany; (P.R.); (M.M.); (O.L.); (B.J.-W.); (I.G.)
| | - Florian Lordick
- Department of Oncology, Gastroenterology, Hepatology, Pulmonology and Infectious Diseases, University Hospital Leipzig, D-04103 Leipzig, Germany;
- University Cancer Center Leipzig (UCCL), University Hospital Leipzig, D-04103 Leipzig, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, D-04103 Leipzig, Germany; (P.R.); (M.M.); (O.L.); (B.J.-W.); (I.G.)
| | - René Thieme
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, D-04103 Leipzig, Germany; (P.R.); (M.M.); (O.L.); (B.J.-W.); (I.G.)
- Correspondence:
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Staritzbichler R, Hunold P, Estrela-Lopis I, Hildebrand PW, Isermann B, Kaiser T. Raman spectroscopy on blood serum samples of patients with end-stage liver disease. PLoS One 2021; 16:e0256045. [PMID: 34492024 PMCID: PMC8423274 DOI: 10.1371/journal.pone.0256045] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/28/2021] [Indexed: 12/05/2022] Open
Abstract
Raman spectroscopy has shown to be a promising method for the examination of biomedical samples. However, until now, its efficacy has not been established in clinical diagnostics. In this study, Raman spectroscopy’s potential application in medical laboratories is evaluated for a large variety (38) of biomarkers. Given 234 serum samples from a cohort of patients with different stages of liver disease, we performed Raman spectroscopy at 780nm excitation wavelength. The Raman spectra were analyzed in combination with the results of routine diagnostics using specifically developed complex mathematical algorithms, including fluorescence filtering, frequency subset selection and several overfitting circumventing strategies, such as independent validation. With the results of this cohort, which were validated in 328 independent samples, a significant proof-of-concept study was completed. This study highlights the need to prevent overfitting and to use independent data for validation. The results reveal that Raman spectroscopy has high potential for use in medical laboratory diagnostics to simultaneously quantify multiple biomarkers.
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Affiliation(s)
- René Staritzbichler
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
- * E-mail: (RS); (TK)
| | - Pascal Hunold
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | | | - Berend Isermann
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Leipzig, Germany
| | - Thorsten Kaiser
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Leipzig, Germany
- * E-mail: (RS); (TK)
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Vogel K, Wei R, Pfaff L, Breite D, Al-Fathi H, Ortmann C, Estrela-Lopis I, Venus T, Schulze A, Harms H, Bornscheuer UT, Maskow T. Enzymatic degradation of polyethylene terephthalate nanoplastics analyzed in real time by isothermal titration calorimetry. Sci Total Environ 2021; 773:145111. [PMID: 33940717 DOI: 10.1016/j.scitotenv.2021.145111] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [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: 09/15/2020] [Revised: 01/06/2021] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Plastics are globally used for a variety of benefits. As a consequence of poor recycling or reuse, improperly disposed plastic waste accumulates in terrestrial and aquatic ecosystems to a considerable extent. Large plastic waste items become fragmented to small particles through mechanical and (photo)chemical processes. Particles with sizes ranging from millimeter (microplastics, <5 mm) to nanometer (nanoplastics, NP, <100 nm) are apparently persistent and have adverse effects on ecosystems and human health. Current research therefore focuses on whether and to what extent microorganisms or enzymes can degrade these NP. In this study, we addressed the question of what information isothermal titration calorimetry, which tracks the heat of reaction of the chain scission of a polyester, can provide about the kinetics and completeness of the degradation process. The majority of the heat represents the cleavage energy of the ester bonds in polymer backbones providing real-time kinetic information. Calorimetry operates even in complex matrices. Using the example of the cutinase-catalyzed degradation of polyethylene terephthalate (PET) nanoparticles, we found that calorimetry (isothermal titration calorimetry-ITC) in combination with thermokinetic models is excellently suited for an in-depth analysis of the degradation processes of NP. For instance, we can separately quantify i) the enthalpy of surface adsorption ∆AdsH = 129 ± 2 kJ mol-1, ii) the enthalpy of the cleavage of the ester bonds ∆EBH = -58 ± 1.9 kJ mol-1 and the apparent equilibrium constant of the enzyme substrate complex K = 0.046 ± 0.015 g L-1. It could be determined that the heat production of PET NP degradation depends to 95% on the reaction heat and only to 5% on the adsorption heat. The fact that the percentage of cleaved ester bonds (η = 12.9 ± 2.4%) is quantifiable with the new method is of particular practical importance. The new method promises a quantification of enzymatic and microbial adsorption to NP and their degradation in mimicked real-world aquatic conditions.
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Affiliation(s)
- Kristina Vogel
- Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research - UFZ, Permoserstraße 15, D-04318 Leipzig, Germany; Institute for Drug Discovery, Leipzig University Medical School, Leipzig University, Bruederstr, 34, D-04103 Leipzig, Germany
| | - Ren Wei
- Department of Biotechnology and Enzyme Catalysis, Institute for Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany.
| | - Lara Pfaff
- Department of Biotechnology and Enzyme Catalysis, Institute for Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany
| | - Daniel Breite
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, D-04318 Leipzig, Germany
| | - Hassan Al-Fathi
- Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research - UFZ, Permoserstraße 15, D-04318 Leipzig, Germany
| | | | - Irina Estrela-Lopis
- Institute for Medical Physics and Biophysics, Medical Faculty, Leipzig University, Härtelstr, 16-18, D-04107 Leipzig, Germany
| | - Tom Venus
- Institute for Medical Physics and Biophysics, Medical Faculty, Leipzig University, Härtelstr, 16-18, D-04107 Leipzig, Germany
| | - Agnes Schulze
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, D-04318 Leipzig, Germany
| | - Hauke Harms
- Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research - UFZ, Permoserstraße 15, D-04318 Leipzig, Germany
| | - Uwe T Bornscheuer
- Department of Biotechnology and Enzyme Catalysis, Institute for Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany
| | - Thomas Maskow
- Department of Environmental Microbiology, Helmholtz-Centre for Environmental Research - UFZ, Permoserstraße 15, D-04318 Leipzig, Germany.
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Rettke D, Döring J, Martin S, Venus T, Estrela-Lopis I, Schmidt S, Ostermann K, Pompe T. Picomolar glyphosate sensitivity of an optical particle-based sensor utilizing biomimetic interaction principles. Biosens Bioelectron 2020; 165:112262. [PMID: 32510337 DOI: 10.1016/j.bios.2020.112262] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 03/30/2020] [Revised: 04/27/2020] [Accepted: 04/29/2020] [Indexed: 01/18/2023]
Abstract
The continually growing use of glyphosate and its critically discussed health and biodiversity risks ask for fast, low cost, on-site sensing technologies for food and water. To address this problem, we designed a highly sensitive sensor built on the remarkably specific recognition of glyphosate by its physiological target enzyme 5-enolpyruvyl-shikimate-3-phosphate synthase (EPSPs). This principle is implemented in an interferometric sensor by using the recently established soft colloidal probe (SCP) technique. EPSPs was site-specifically immobilized on a transparent surface utilizing the self-assembling properties of circadian clock gene 2 hydrophobin chimera and homogeneity of the layer was evidenced by atomic force microscopy. Exposure of the enzyme decorated biochip to glyphosate containing samples causes formation of enzyme-analyte complexes and a competitive loss of available binding sites for glyphosate-functionalized poly(ethylene glycol) SCPs. Functionalization of the SCPs with different types of linker molecules and glyphosate was assessed employing confocal laser scanning microscopy as well as confocal Raman microspectroscopy. Overall, reflection interference contrast microscopy analysis of SCP-biochip interactions revealed a strong influence of linker length and glyphosate coupling position on the sensitivity of the sensor. In employing a combination of pentaglycine linker and tethering glyphosate via its secondary amino group, concentrations in aqueous solutions down to 100 pM could be measured by the differential adhesion between SCP and biochip surface, supported by automated image analysis algorithms. This sensing concept could even prove its exceptional pM sensitivity in combination with a superior discrimination against structurally related compounds.
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Affiliation(s)
- David Rettke
- Institute of Biochemistry, Leipzig University, Johannisallee 21-23, 04103, Leipzig, Germany
| | - Julia Döring
- Institute of Genetics, Technische Universität Dresden, Zellescher Weg 20b, 01217, Dresden, Germany
| | - Steve Martin
- Institute of Biochemistry, Leipzig University, Johannisallee 21-23, 04103, Leipzig, Germany
| | - Tom Venus
- Institute of Medical Physics and Biophysics, Leipzig University, Härtelstraße 16-18, 04107, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, Leipzig University, Härtelstraße 16-18, 04107, Leipzig, Germany
| | - Stephan Schmidt
- Institute of Organic Chemistry and Macromolecular Chemistry, Heinrich Heine Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Kai Ostermann
- Institute of Genetics, Technische Universität Dresden, Zellescher Weg 20b, 01217, Dresden, Germany
| | - Tilo Pompe
- Institute of Biochemistry, Leipzig University, Johannisallee 21-23, 04103, Leipzig, Germany.
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Coelho JM, Camargo NS, Ganassin R, Rocha MCO, Merker C, Böttner J, Estrela-Lopis I, Py-Daniel KR, Jardim KV, Sousa MH, Ombredane AS, Joanitti GA, Silva RC, Azevedo RB, Longo JPF, Muehlmann LA. Oily core/amphiphilic polymer shell nanocapsules change the intracellular fate of doxorubicin in breast cancer cells. J Mater Chem B 2020; 7:6390-6398. [PMID: 31642844 DOI: 10.1039/c9tb00587k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The aim of this work was to develop and test the in vitro biological activity of nanocapsules loaded with a doxorubicin (DOX) free base dissolved in a core of castor oil shelled by poly(methyl vinyl ether-co-maleic anhydride) conjugated to n-octadecylamine residues. This system was stable and monodisperse, with a hydrodynamic diameter of about 300 nm. These nanocapsules changed the intracellular distribution of DOX, from the nuclei to the cytoplasm, and exhibited higher toxicity towards cancer cells - 4T1 and MCF-7 - and significantly lower toxicity towards normal cells - NIH-3T3 and MCF-10A - in vitro. In conclusion, these nanocapsules are suitable DOX carriers, which remain to be studied in in vivo tumor models.
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Affiliation(s)
- Janaina Moreira Coelho
- Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil. and Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Nichollas Serafim Camargo
- Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil. and Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Rayane Ganassin
- Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil. and Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Márcia Cristina Oliveira Rocha
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Carolin Merker
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Julia Böttner
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Karen Rapp Py-Daniel
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | | | | | - Alicia Simalie Ombredane
- Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil. and Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil and Laboratory of Bioactive Compounds and Nanobiotechnology, Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil
| | - Graziella Anselmo Joanitti
- Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil. and Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil and Laboratory of Bioactive Compounds and Nanobiotechnology, Faculty of Ceilandia, University of Brasilia, Brasilia 72220-900, Brazil
| | - Renata Carvalho Silva
- Institute of Metrology, Quality and Technology (Inmetro), Rio de Janeiro, 20250-020, Brazil
| | - Ricardo Bentes Azevedo
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - João Paulo Figueiró Longo
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
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Jäger E, Murthy S, Schmidt C, Hahn M, Strobel S, Peters A, Stäubert C, Sungur P, Venus T, Geisler M, Radusheva V, Raps S, Rothe K, Scholz R, Jung S, Wagner S, Pierer M, Seifert O, Chang W, Estrela-Lopis I, Raulien N, Krohn K, Sträter N, Hoeppener S, Schöneberg T, Rossol M, Wagner U. Calcium-sensing receptor-mediated NLRP3 inflammasome response to calciprotein particles drives inflammation in rheumatoid arthritis. Nat Commun 2020; 11:4243. [PMID: 32843625 PMCID: PMC7447633 DOI: 10.1038/s41467-020-17749-6] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [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: 11/19/2019] [Accepted: 07/16/2020] [Indexed: 12/17/2022] Open
Abstract
Increased extracellular Ca2+ concentrations ([Ca2+]ex) trigger activation of the NLRP3 inflammasome in monocytes through calcium-sensing receptor (CaSR). To prevent extraosseous calcification in vivo, the serum protein fetuin-A stabilizes calcium and phosphate into 70-100 nm-sized colloidal calciprotein particles (CPPs). Here we show that monocytes engulf CPPs via macropinocytosis, and this process is strictly dependent on CaSR signaling triggered by increases in [Ca2+]ex. Enhanced macropinocytosis of CPPs results in increased lysosomal activity, NLRP3 inflammasome activation, and IL-1β release. Monocytes in the context of rheumatoid arthritis (RA) exhibit increased CPP uptake and IL-1β release in response to CaSR signaling. CaSR expression in these monocytes and local [Ca2+] in afflicted joints are increased, probably contributing to this enhanced response. We propose that CaSR-mediated NLRP3 inflammasome activation contributes to inflammatory arthritis and systemic inflammation not only in RA, but possibly also in other inflammatory conditions. Inhibition of CaSR-mediated CPP uptake might be a therapeutic approach to treating RA.
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Affiliation(s)
- Elisabeth Jäger
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Supriya Murthy
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Caroline Schmidt
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Magdalena Hahn
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Sarah Strobel
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Anna Peters
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Johannisallee 30, 04103, Leipzig, Germany
| | - Claudia Stäubert
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Johannisallee 30, 04103, Leipzig, Germany
| | - Pelin Sungur
- Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Humboldtstraße 10, 07743, Jena, Germany
| | - Tom Venus
- Institute for Medical Physics and Biophysics, Leipzig University, Härtelstraße 16-18, 04107, Leipzig, Germany
| | - Mandy Geisler
- Institute of Bioanalytical Chemistry, Center for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103, Leipzig, Germany
| | - Veselina Radusheva
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Stefanie Raps
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Kathrin Rothe
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Roger Scholz
- Department of Orthopaedic, Trauma and Plastic Surgery, Leipzig University, Liebigstraße 20, Leipzig, Germany
| | - Sebastian Jung
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Sylke Wagner
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Matthias Pierer
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Olga Seifert
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Wenhan Chang
- UCSF Department of Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Irina Estrela-Lopis
- Institute for Medical Physics and Biophysics, Leipzig University, Härtelstraße 16-18, 04107, Leipzig, Germany
| | - Nora Raulien
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany
| | - Knut Krohn
- DNA Core Unit Leipzig, Liebigstraße 19, 04103, Leipzig, Germany
| | - Norbert Sträter
- Institute of Bioanalytical Chemistry, Center for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103, Leipzig, Germany
| | - Stephanie Hoeppener
- Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Humboldtstraße 10, 07743, Jena, Germany
| | - Torsten Schöneberg
- Rudolf Schönheimer Institute of Biochemistry, Faculty of Medicine, Leipzig University, Johannisallee 30, 04103, Leipzig, Germany
| | - Manuela Rossol
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany.
| | - Ulf Wagner
- Department of Internal Medicine, Division of Rheumatology, Leipzig University, Liebigstraße 19, 04103, Leipzig, Germany.
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Tentschert J, Laux P, Jungnickel H, Brunner J, Estrela-Lopis I, Merker C, Meijer J, Ernst H, Ma-Hock L, Keller J, Landsiedel R, Luch A. Organ burden of inhaled nanoceria in a 2-year low-dose exposure study: dump or depot? Nanotoxicology 2020; 14:1011-1012. [PMID: 32815750 DOI: 10.1080/17435390.2020.1786184] [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: 10/23/2022]
Affiliation(s)
- Jutta Tentschert
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Peter Laux
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Harald Jungnickel
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Josephine Brunner
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Carolin Merker
- Institute of Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Jan Meijer
- Felix Bloch Institute for Solid State Physics, Leipzig University, Leipzig, Germany
| | - Heinrich Ernst
- Department of Pathology, Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Hannover, Germany
| | - Lan Ma-Hock
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
| | - Jana Keller
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
| | | | - Andreas Luch
- Department of Chemicals and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
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Tentschert J, Laux P, Jungnickel H, Brunner J, Estrela-Lopis I, Merker C, Meijer J, Ernst H, Ma-Hock L, Keller J, Landsiedel R, Luch A. Organ burden of inhaled nanoceria in a 2-year low-dose exposure study: dump or depot? Nanotoxicology 2020; 14:554-576. [PMID: 32216600 DOI: 10.1080/17435390.2020.1736355] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
No detailed information on in vivo biokinetics of CeO2 nanoparticles (NPs) following chronic low-dose inhalation is available. The CeO2 burden for lung, lung-associated lymph nodes, and major non-pulmonary organs, blood, and feces, was determined in a chronic whole-body inhalation study in female Wistar rats undertaken according to OECD TG453 (6 h per day for 5 days per week for a 104 weeks with the following concentrations: 0, 0.1, 0.3, 1.0, and 3.0 mg/m3, animals were sacrificed after 3, 12, 24 months). Different spectroscopy methods (ICP-MS, ion-beam-microscopy) were used for the quantification of organ burden and for visualization of NP distribution patterns in tissues. After 24 months of exposure, the highest CeO2 lung burden (4.41 mg per lung) was associated with the highest aerosol concentration and was proportionally lower for the other groups in a dose-dependent manner. Imaging techniques confirmed the presence of CeO2 agglomerates of different size categories within lung tissue with a non-homogenous distribution. For the highest exposure group, after 24 months in total 1.2% of the dose retained in the lung was found in the organs and tissues analyzed in this study, excluding lymph nodes and skeleton. The CeO2 burden per tissue decreased from lungs > lymph nodes > hard bone > liver > bone marrow. For two dosage groups, the liver organ burden showed a low accumulation rate. Here, the liver can be regarded as depot, whereas kidneys, the skeleton, and bone marrow seem to be dumps due to steadily increasing NP burden over time.
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Affiliation(s)
- Jutta Tentschert
- Department of Chemicals and Product Safety, German Federal Institute of Risk Assessment (BfR), Berlin, Germany
| | - Peter Laux
- Department of Chemicals and Product Safety, German Federal Institute of Risk Assessment (BfR), Berlin, Germany
| | - Harald Jungnickel
- Department of Chemicals and Product Safety, German Federal Institute of Risk Assessment (BfR), Berlin, Germany
| | - Josephine Brunner
- Department of Chemicals and Product Safety, German Federal Institute of Risk Assessment (BfR), Berlin, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Carolin Merker
- Institute of Medical Physics and Biophysics, Leipzig University, Leipzig, Germany
| | - Jan Meijer
- Felix Bloch Institute for Solid State Physics, Leipzig University, Leipzig, Germany
| | - Heinrich Ernst
- Department of Pathology, Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Hannover, Germany
| | - Lan Ma-Hock
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
| | - Jana Keller
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
| | | | - Andreas Luch
- Department of Chemicals and Product Safety, German Federal Institute of Risk Assessment (BfR), Berlin, Germany
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da Rocha MCO, da Silva PB, Radicchi MA, Andrade BYG, de Oliveira JV, Venus T, Merker C, Estrela-Lopis I, Longo JPF, Báo SN. Docetaxel-loaded solid lipid nanoparticles prevent tumor growth and lung metastasis of 4T1 murine mammary carcinoma cells. J Nanobiotechnology 2020; 18:43. [PMID: 32164731 PMCID: PMC7068958 DOI: 10.1186/s12951-020-00604-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 03/06/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Metastasis causes the most breast cancer-related deaths in women. Here, we investigated the antitumor effect of solid lipid nanoparticles (SLN-DTX) when used in the treatment of metastatic breast tumors using 4T1-bearing BALB/c mice. RESULTS Solid lipid nanoparticles (SLNs) were produced using the high-energy method. Compritol 888 ATO was selected as the lipid matrix, and Pluronic F127 and Span 80 as the surfactants to stabilize nanoparticle dispersion. The particles had high stability for at least 120 days. The SLNs' dispersion size was 128 nm, their polydispersity index (PDI) was 0.2, and they showed a negative zeta potential. SLNs had high docetaxel (DTX) entrapment efficiency (86%), 2% of drug loading and showed a controlled drug-release profile. The half-maximal inhibitory concentration (IC50) of SLN-DTX against 4T1 cells was more than 100 times lower than that of free DTX after 24 h treatment. In the cellular uptake test, SLN-DTX was taken into the cells significantly more than free DTX. The accumulation in the G2-M phase was significantly higher in cells treated with SLN-DTX (73.7%) than in cells treated with free DTX (23.0%), which induced subsequent apoptosis. TEM analysis revealed that SLN-DTX internalization is mediated by endocytosis, and fluorescence microscopy showed DTX induced microtubule damage. In vivo studies showed that SLN-DTX compared to free docetaxel exhibited higher antitumor efficacy by reducing tumor volume (p < 0.0001) and also prevented spontaneous lung metastasis in 4T1 tumor-bearing mice. Histological studies of lungs confirmed that treatment with SLN-DTX was able to prevent tumor. IL-6 serum levels, ki-67 and BCL-2 expression were analyzed and showed a remarkably strong reduction when used in a combined treatment. CONCLUSIONS These results indicate that DTX-loaded SLNs may be a promising carrier to treat breast cancer and in metastasis prevention.
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Affiliation(s)
| | - Patrícia Bento da Silva
- Nanobiotechnology Laboratory, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | - Marina Arantes Radicchi
- Electron Microscopy Laboratory, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | | | - Jaqueline Vaz de Oliveira
- Nanobiotechnology Laboratory, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | - Tom Venus
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig, Germany
| | - Carolin Merker
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig, Germany
| | - João Paulo Figueiró Longo
- Nanobiotechnology Laboratory, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | - Sônia Nair Báo
- Electron Microscopy Laboratory, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil.
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11
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Rodrigues MC, Vieira LG, Horst FH, de Araújo EC, Ganassin R, Merker C, Meyer T, Böttner J, Venus T, Longo JPF, Chaves SB, Garcia MP, Estrela-Lopis I, Azevedo RB, Muehlmann LA. Photodynamic therapy mediated by aluminium-phthalocyanine nanoemulsion eliminates primary tumors and pulmonary metastases in a murine 4T1 breast adenocarcinoma model. J Photochem Photobiol B 2020; 204:111808. [PMID: 32006892 DOI: 10.1016/j.jphotobiol.2020.111808] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 01/21/2020] [Accepted: 01/25/2020] [Indexed: 12/21/2022]
Abstract
Photodynamic therapy (PDT) is effective in the treatment of different types of cancer, such as basal cell carcinoma and other superficial cancers. However, improvements in photosensitizer delivery are still needed, and the use of PDT against more deeply located tumors has been the subject of many studies. Thus, the goal of this study was to evaluate the efficacy of a nanoemulsion containing aluminium-phthalocyanine (AlPc-NE) as a mediator of photodynamic therapy (PDT-AlPc-NE) against grafted 4T1 breast adenocarcinoma tumors in mice (BALB/c). Short after the appearance of the tumor, the animals were divided into groups (n = 5) as follows: untreated; only AlPc-NE and treated with PDT-AlPc-NE. The tumor volume was measured with a digital calliper at specific times. The presence of metastasis in the lungs was evaluated by microtomography and histopathological analyses. The results show that the application of PDT-AlPc-NE eradicated the transplanted tumors in all the treated animals, while the animals from control groups presented a robust increase in the tumor volume. Still more significantly, microtomography showed the animals submitted the PDT-AlPc-NE to be free of detectable metastasis in the lungs. The histological analysis of the lungs further confirmed the results verified by the microtomography. Therefore, this study suggests that PDT-AlPc-NE is effective in the elimination of experimentally grafted breast tumors in mice and also in preventing the formation of metastasis in the lungs.
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Affiliation(s)
- Mosar Corrêa Rodrigues
- Laboratory of Nanoscience and Immunology, Faculty of Ceilandia, University of Brasilia, Brasilia/DF 72220-900, Brazil; Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Lívia Gumieri Vieira
- Laboratory of Nanoscience and Immunology, Faculty of Ceilandia, University of Brasilia, Brasilia/DF 72220-900, Brazil; Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Frederíco Hillesheim Horst
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Eduarda Campos de Araújo
- Laboratory of Nanoscience and Immunology, Faculty of Ceilandia, University of Brasilia, Brasilia/DF 72220-900, Brazil; Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Rayane Ganassin
- Laboratory of Nanoscience and Immunology, Faculty of Ceilandia, University of Brasilia, Brasilia/DF 72220-900, Brazil; Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Carolin Merker
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Thomas Meyer
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Julia Böttner
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Tom Venus
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - João Paulo F Longo
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Sacha Braun Chaves
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Mônica Pereira Garcia
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Irina Estrela-Lopis
- Institute of Medical Physics & Biophysics, Leipzig University, Leipzig 04107, Germany
| | - Ricardo Bentes Azevedo
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil
| | - Luis Alexandre Muehlmann
- Laboratory of Nanoscience and Immunology, Faculty of Ceilandia, University of Brasilia, Brasilia/DF 72220-900, Brazil; Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasilia 70910-900, Brazil.
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12
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Blücher C, Zilberfain C, Venus T, Spindler N, Dietrich A, Burkhardt R, Stadler SC, Estrela-Lopis I. Single cell study of adipose tissue mediated lipid droplet formation and biochemical alterations in breast cancer cells. Analyst 2020; 144:5558-5570. [PMID: 31408068 DOI: 10.1039/c9an00816k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Obesity is a known risk factor for breast cancer and a negative prognostic factor for cancer recurrence and survival. Several studies demonstrated that aggressive breast tumor cells contain higher numbers of intracellular lipid droplets (LDs). Here we applied simultaneous visualization, identification and quantification of the lipid accumulation in lipid droplets (LDs) of aggressive, human triple-negative MDA-MB-231 breast cancer cells treated with adipose tissue-conditioned medium (ACM) derived from overweight and obese patients. In addition to Oil Red O and AdipoRed fluorescent staining, label-free confocal Raman microspectroscopy (CRM) has been applied. CRM enables imaging of cell compartments as well as quantification and monitoring of specific biomolecules and metabolic processes on a single cell level. Interestingly, breast cancer cells incubated with ACM showed a significantly higher number of intracellular LDs. Cultivation of breast tumor cells with ACM of obese patients induced the formation of LDs with a 20-fold higher lipid concentration than cultivation with basal medium. This is in line with the significantly higher levels of NEFAs (non-esterified fatty acids) detected in the ACM obtained from obese patient compared to ACM obtained from overweight patients or basal medium. Further, by principal component analysis, we identified a significant increase in unsaturation, esterification and lipid to protein ratio in LDs in breast cancer cells incubated with ACM. CRM analyses might function as a valuable diagnostic tool to identify metabolic alterations in biological samples which in turn could provide more detailed insights in the pathogenesis of breast cancer in association with obesity.
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Affiliation(s)
- Christina Blücher
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, Germany.
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13
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Cáceres-Vélez PR, Fascineli ML, Rojas E, Meyer T, Venus T, Grisolia CK, Estrela-Lopis I, Moya S, Morais PC, Azevedo RB. Impact of humic acid on the persistence, biological fate and toxicity of silver nanoparticles: A study in adult zebrafish. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.enmm.2019.100234] [Citation(s) in RCA: 10] [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: 10/26/2022]
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14
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Pulagam KR, Gona KB, Gómez-Vallejo V, Meijer J, Zilberfain C, Estrela-Lopis I, Baz Z, Cossío U, Llop J. Gold Nanoparticles as Boron Carriers for Boron Neutron Capture Therapy: Synthesis, Radiolabelling and In vivo Evaluation. Molecules 2019; 24:E3609. [PMID: 31591329 PMCID: PMC6804187 DOI: 10.3390/molecules24193609] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 09/16/2019] [Accepted: 10/01/2019] [Indexed: 02/07/2023] Open
Abstract
Background: Boron Neutron Capture Therapy (BNCT) is a binary approach to cancer therapy that requires accumulation of boron atoms preferentially in tumour cells. This can be achieved by using nanoparticles as boron carriers and taking advantage of the enhanced permeability and retention (EPR) effect. Here, we present the preparation and characterization of size and shape-tuned gold NPs (AuNPs) stabilised with polyethylene glycol (PEG) and functionalized with the boron-rich anion cobalt bis(dicarbollide), commonly known as COSAN. The resulting NPs were radiolabelled with 124I both at the core and the shell, and were evaluated in vivo in a mouse model of human fibrosarcoma (HT1080 cells) using positron emission tomography (PET). Methods: The thiolated COSAN derivatives for subsequent attachment to the gold surface were synthesized by reaction of COSAN with tetrahydropyran (THP) followed by ring opening using potassium thioacetate (KSAc). Iodination on one of the boron atoms of the cluster was also carried out to enable subsequent radiolabelling of the boron cage. AuNPs grafted with mPEG-SH (5 Kda) and thiolated COSAN were prepared by ligand displacement. Radiolabelling was carried out both at the shell (isotopic exchange) and at the core (anionic absorption) of the NPs using 124I to enable PET imaging. Results: Stable gold nanoparticles simultaneously functionalised with PEG and COSAN (PEG-AuNPs@[4]-) with hydrodynamic diameter of 37.8 ± 0.5 nm, core diameter of 19.2 ± 1.4 nm and ξ-potential of -18.0 ± 0.7 mV were obtained. The presence of the COSAN on the surface of the NPs was confirmed by Raman Spectroscopy and UV-Vis spectrophotometry. PEG-AuNPs@[4]- could be efficiently labelled with 124I both at the core and the shell. Biodistribution studies in a xenograft mouse model of human fibrosarcoma showed major accumulation in liver, lungs and spleen, and poor accumulation in the tumour. The dual labelling approach confirmed the in vivo stability of the PEG-AuNPs@[4]-. Conclusions: PEG stabilized, COSAN-functionalised AuNPs could be synthesized, radiolabelled and evaluated in vivo using PET. The low tumour accumulation in the animal model assayed points to the need of tuning the size and geometry of the gold core for future studies.
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Affiliation(s)
- Krishna R Pulagam
- Radiochemistry and Nuclear Imaging Group, CIC biomaGUNE, 20014 San Sebastian, Spain.
| | - Kiran B Gona
- Radiochemistry and Nuclear Imaging Group, CIC biomaGUNE, 20014 San Sebastian, Spain.
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA.
- Veterans Affairs Connecticut Healthcare System, West Haven, CT 06516, USA.
| | | | - Jan Meijer
- Institute of Medical Physics and Biophysics, Leipzig University, Härtelstrasse 16-18, 04107 Leipzig, Germany.
| | - Carolin Zilberfain
- Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany.
| | - Irina Estrela-Lopis
- Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany.
| | - Zuriñe Baz
- Radiochemistry and Nuclear Imaging Group, CIC biomaGUNE, 20014 San Sebastian, Spain.
| | - Unai Cossío
- Radioimaging and Image Analysis Platform, CIC biomaGUNE, 20014 San Sebastian, Spain.
| | - Jordi Llop
- Radiochemistry and Nuclear Imaging Group, CIC biomaGUNE, 20014 San Sebastian, Spain.
- Centro de Investigación Biomédica en red Enfermedades Respiratorias-CIBERES, 28029 Madrid, Spain.
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15
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Chaves NL, Amorim DA, Lopes CAP, Estrela-Lopis I, Böttner J, de Souza AR, Báo SN. Comparison of the effect of rhodium citrate-associated iron oxide nanoparticles on metastatic and non-metastatic breast cancer cells. Cancer Nanotechnol 2019. [DOI: 10.1186/s12645-019-0052-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Abstract
Background
Nanocarriers have the potential to improve the therapeutic index of currently available drugs by increasing drug efficacy, lowering drug toxicity and achieving steady-state therapeutic levels of drugs over an extended period. The association of maghemite nanoparticles (NPs) with rhodium citrate (forming the complex hereafter referred to as MRC) has the potential to increase the specificity of the cytotoxic action of the latter compound, since this nanocomposite can be guided or transported to a target by the use of an external magnetic field. However, the behavior of these nanoparticles for an extended time of exposure to breast cancer cells has not yet been explored, and nor has MRC cytotoxicity comparison in different cell lines been performed until now. In this work, the effects of MRC NPs on these cells were analyzed for up to 72 h of exposure, and we focused on comparing NPs’ therapeutic effectiveness in different cell lines to elect the most responsive model, while elucidating the underlying action mechanism.
Results
MRC complexes exhibited broad cytotoxicity on human tumor cells, mainly in the first 24 h. However, while MRC induced cytotoxicity in MDA-MB-231 in a time-dependent manner, progressively decreasing the required dose for significant reduction in cell viability at 48 and 72 h, MCF-7 appears to recover its viability after 48 h of exposure. The recovery of MCF-7 is possibly explained by a resistance mechanism mediated by PGP (P-glycoprotein) proteins, which increase in these cells after MRC treatment. Remaining viable tumor metastatic cells had the migration capacity reduced after treatment with MRC (24 h). Moreover, MRC treatment induced S phase arrest of the cell cycle.
Conclusion
MRC act at the nucleus, inhibiting DNA synthesis and proliferation and inducing cell death. These effects were verified in both tumor lines, but MDA-MB-231 cells seem to be more responsive to the effects of NPs. In addition, NPs may also disrupt the metastatic activity of remaining cells, by reducing their migratory capacity. Our results suggest that MRC nanoparticles are a promising nanomaterial that can provide a convenient route for tumor targeting and treatment, mainly in metastatic cells.
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Sieg H, Braeuning C, Kunz BM, Daher H, Kästner C, Krause BC, Meyer T, Jalili P, Hogeveen K, Böhmert L, Lichtenstein D, Burel A, Chevance S, Jungnickel H, Tentschert J, Laux P, Braeuning A, Gauffre F, Fessard V, Meijer J, Estrela-Lopis I, Thünemann AF, Luch A, Lampen A. Uptake and molecular impact of aluminum-containing nanomaterials on human intestinal caco-2 cells. Nanotoxicology 2018; 12:992-1013. [PMID: 30317887 DOI: 10.1080/17435390.2018.1504999] [Citation(s) in RCA: 21] [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: 10/28/2022]
Abstract
Aluminum (Al) is one of the most common elements in the earth crust and increasingly used in food, consumer products and packaging. Its hazard potential for humans is still not completely understood. Besides the metallic form, Al also exists as mineral, including the insoluble oxide, and in soluble ionic forms. Representatives of these three species, namely a metallic and an oxidic species of Al-containing nanoparticles and soluble aluminum chloride, were applied to human intestinal cell lines as models for the intestinal barrier. We characterized physicochemical particle parameters, protein corona composition, ion release and cellular uptake. Different in vitro assays were performed to determine potential effects and molecular modes of action related to the individual chemical species. For a deeper insight into signaling processes, microarray transcriptome analyses followed by bioinformatic data analysis were employed. The particulate Al species showed different solubility in biological media. Metallic Al nanoparticles released more ions than Al2O3 nanoparticles, while AlCl3 showed a mixture of dissolved and agglomerated particulate entities in biological media. The protein corona composition differed between both nanoparticle species. Cellular uptake, investigated in transwell experiments, occurred predominantly in particulate form, whereas ionic Al was not taken up by intestinal cell lines. Transcellular transport was not observed. None of the Al species showed cytotoxic effects up to 200 µg Al/mL. The transcriptome analysis indicated mainly effects on oxidative stress pathways, xenobiotic metabolism and metal homeostasis. We have shown for the first time that intestinal cellular uptake of Al occurs preferably in the particle form, while toxicological effects appear to be ion-related.
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Affiliation(s)
- Holger Sieg
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Caroline Braeuning
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Birgitta Maria Kunz
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Hannes Daher
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Claudia Kästner
- b German Federal Institute for Materials Research and Testing (BAM) , Berlin, Germany
| | - Benjamin-Christoph Krause
- c Department of Chemical and Product Safety , German Federal Institute for Risk Assessment , Berlin, Germany
| | - Thomas Meyer
- d Institute for Medical Physics and Biophysics , Leipzig University , Leipzig , Germany
| | - Pégah Jalili
- e ANSES, French Agency for Food, Environmental and Occupational Health and Safety , Fougères Laboratory, Toxicology of contaminants unit , Fougères Cedex , France
| | - Kevin Hogeveen
- e ANSES, French Agency for Food, Environmental and Occupational Health and Safety , Fougères Laboratory, Toxicology of contaminants unit , Fougères Cedex , France
| | - Linda Böhmert
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Dajana Lichtenstein
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Agnès Burel
- f CNRS, Inserm , Univ Rennes , Rennes , France
| | - Soizic Chevance
- g CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , Univ Rennes , Rennes , France
| | - Harald Jungnickel
- c Department of Chemical and Product Safety , German Federal Institute for Risk Assessment , Berlin, Germany
| | - Jutta Tentschert
- c Department of Chemical and Product Safety , German Federal Institute for Risk Assessment , Berlin, Germany
| | - Peter Laux
- b German Federal Institute for Materials Research and Testing (BAM) , Berlin, Germany
| | - Albert Braeuning
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
| | - Fabienne Gauffre
- g CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 , Univ Rennes , Rennes , France
| | - Valérie Fessard
- e ANSES, French Agency for Food, Environmental and Occupational Health and Safety , Fougères Laboratory, Toxicology of contaminants unit , Fougères Cedex , France
| | - Jan Meijer
- h Felix Bloch Institute for Solid State Physics , Leipzig University , Leipzig , Germany
| | - Irina Estrela-Lopis
- d Institute for Medical Physics and Biophysics , Leipzig University , Leipzig , Germany
| | - Andreas F Thünemann
- b German Federal Institute for Materials Research and Testing (BAM) , Berlin, Germany
| | - Andreas Luch
- c Department of Chemical and Product Safety , German Federal Institute for Risk Assessment , Berlin, Germany
| | - Alfonso Lampen
- a Department of Food Safety , German Federal Institute for Risk Assessment , Berlin , Germany
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17
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Cáceres-Vélez PR, Fascineli ML, Sousa MH, Grisolia CK, Yate L, de Souza PEN, Estrela-Lopis I, Moya S, Azevedo RB. Humic acid attenuation of silver nanoparticle toxicity by ion complexation and the formation of a Ag 3+ coating. J Hazard Mater 2018; 353:173-181. [PMID: 29674092 DOI: 10.1016/j.jhazmat.2018.04.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 10/16/2017] [Revised: 03/08/2018] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
The use of silver nanoparticles (AgNPs) result in an inevitable contact with aquatic environments. Here we study the behavior of AgNPs and the developmental toxicity in zebrafish embryos exposed to these nanoparticles (0-10 mg/L) with and without the presence of HA (20 mg/L), using zebrafish facility water (ZFW) and zebrafish growing media (ZGM). The presence of cations and HA gave rise to a decrease in Ag ion release and ζ-potential, an increase in the hydrodynamic diameter and oxidation of the AgNP surface. The results show that the presence of HA and cations in the media, as well as the silver speciation, i.e., the unusual presence of Ag3+, decreases the toxicity of AgNPs (LC50AgNPs: 1.19 mg/L; LC50AgNPs + HA: 3.56 mg/L), as well as silver bioavailability and toxicity in zebrafish embryos. Developmental alterations and the LC50 (1.19 mg/L) of AgNPs in ZFW were more relevant (p ≤ 0.05) than for AgNPs in ZGM (LC50 ˃ 10 mg/L). It was demonstrated that the bioaccumulation and toxicity of AgNPs depends on several factors including AgNPs concentration, nanoparticle aggregation, dissolved silver ions, speciation of silver ions, the amount of salt in the environment, the presence of humic substances and others, and different combinations of all of these factors.
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Affiliation(s)
- Paolin Rocio Cáceres-Vélez
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília, Federal District, Brazil
| | - Maria Luiza Fascineli
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília, Federal District, Brazil
| | | | - Cesar Koppe Grisolia
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília, Federal District, Brazil
| | - Luis Yate
- Soft Matter Nanotechnology Laboratory CIC biomaGUNE, Donostia-San Sebastián, Spain
| | - Paulo Eduardo Narcizo de Souza
- Laboratory of Softwares and Instrumentation on Applied Physics, Institute of Physics, University of Brasília, Federal District, Brazil
| | - Irina Estrela-Lopis
- Faculty of Medicine, Institute of Medical Physics & Biophysics, University of Leipzig, Leipzig, Germany
| | - Sergio Moya
- Soft Matter Nanotechnology Laboratory CIC biomaGUNE, Donostia-San Sebastián, Spain
| | - Ricardo Bentes Azevedo
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília, Federal District, Brazil.
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Krause B, Meyer T, Sieg H, Kästner C, Reichardt P, Tentschert J, Jungnickel H, Estrela-Lopis I, Burel A, Chevance S, Gauffre F, Jalili P, Meijer J, Böhmert L, Braeuning A, Thünemann AF, Emmerling F, Fessard V, Laux P, Lampen A, Luch A. Characterization of aluminum, aluminum oxide and titanium dioxide nanomaterials using a combination of methods for particle surface and size analysis. RSC Adv 2018; 8:14377-14388. [PMID: 35540747 PMCID: PMC9079890 DOI: 10.1039/c8ra00205c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 01/08/2018] [Accepted: 03/22/2018] [Indexed: 12/22/2022] Open
Abstract
The application of appropriate analytical techniques is essential for nanomaterial (NM) characterization. In this study, we compared different analytical techniques for NM analysis. Regarding possible adverse health effects, ionic and particulate NM effects have to be taken into account. As NMs behave quite differently in physiological media, special attention was paid to techniques which are able to determine the biosolubility and complexation behavior of NMs. Representative NMs of similar size were selected: aluminum (Al0) and aluminum oxide (Al2O3), to compare the behavior of metal and metal oxides. In addition, titanium dioxide (TiO2) was investigated. Characterization techniques such as dynamic light scattering (DLS) and nanoparticle tracking analysis (NTA) were evaluated with respect to their suitability for fast characterization of nanoparticle dispersions regarding a particle's hydrodynamic diameter and size distribution. By application of inductively coupled plasma mass spectrometry in the single particle mode (SP-ICP-MS), individual nanoparticles were quantified and characterized regarding their size. SP-ICP-MS measurements were correlated with the information gained using other characterization techniques, i.e. transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). The particle surface as an important descriptor of NMs was analyzed by X-ray diffraction (XRD). NM impurities and their co-localization with biomolecules were determined by ion beam microscopy (IBM) and confocal Raman microscopy (CRM). We conclude advantages and disadvantages of the different techniques applied and suggest options for their complementation. Thus, this paper may serve as a practical guide to particle characterization techniques. The application of appropriate analytical techniques is essential for nanomaterial (NM) characterization.![]()
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Ganassin R, Merker C, Rodrigues MC, Guimarães NF, Sodré CSC, Ferreira QDS, da Silva SW, Ombredane AS, Joanitti GA, Py-Daniel KR, Zhang J, Jiang CS, de Morais PC, Mosiniewicz-Szablewska E, Suchocki P, Longo JPF, Meijer J, Estrela-Lopis I, de Azevedo RB, Muehlmann LA. Nanocapsules for the co-delivery of selol and doxorubicin to breast adenocarcinoma 4T1 cells in vitro. Artif Cells Nanomed Biotechnol 2017; 46:2002-2012. [PMID: 29179603 DOI: 10.1080/21691401.2017.1408020] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nanocapsules (NCS-DOX) with an oily core of selol and a shell of poly(methyl vinyl ether-co-maleic anhydride) covalently conjugated to doxorubicin were developed. These nanocapsules are spherical, with an average hydrodynamic diameter of about 170 nm, and with negative zeta potential. NCS-DOX effectively co-delivered the selol and the doxorubicin into 4T1 cells and changed the intracellular distribution of DOX from the nuclei to the mitochondria. Moreover, a significantly increased cytotoxicity against 4T1 cells was observed, which is suggestive of additive or synergic effect of selol and doxorubicin. In conclusion, PVM/MA nanocapsules are suitable platforms to co-deliver drugs into cancer cells.
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Affiliation(s)
- Rayane Ganassin
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil.,b Faculty of Ceilandia , University of Brasilia , Brasilia , Brazil
| | - Carolin Merker
- c Institute of Medical Physics & Biophysics , Leipzig University , Leipzig , Germany
| | - Mosar Corrêa Rodrigues
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil.,b Faculty of Ceilandia , University of Brasilia , Brasilia , Brazil
| | - Nayara Felipe Guimarães
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil
| | - Carine Sampaio Cerqueira Sodré
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil.,b Faculty of Ceilandia , University of Brasilia , Brasilia , Brazil
| | | | | | - Alicia Simalie Ombredane
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil
| | - Graziella Anselmo Joanitti
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil.,b Faculty of Ceilandia , University of Brasilia , Brasilia , Brazil
| | - Karen Rapp Py-Daniel
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil
| | - Juan Zhang
- e School of Biological Science and Technology , University of Jinan , Jinan , China
| | - Cheng-Shi Jiang
- e School of Biological Science and Technology , University of Jinan , Jinan , China
| | - Paulo César de Morais
- d Institute of Physics , University of Brasilia , Brasilia , Brazil.,f School of Automation , Huazhong University of Science and Technology , Wuhan , China
| | | | - Piotr Suchocki
- h Department of Bioanalysis and Drugs Analysis , Warsaw Medical University , Warsaw , Poland
| | - João Paulo Figueiró Longo
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil
| | - Jan Meijer
- i Felix Bloch Institute for Solid Body Physics , Leipzig University , Leipzig , Germany
| | - Irina Estrela-Lopis
- c Institute of Medical Physics & Biophysics , Leipzig University , Leipzig , Germany
| | - Ricardo Bentes de Azevedo
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil
| | - Luis Alexandre Muehlmann
- a Department of Genetics and Morphology , Institute of Biological Sciences, University of Brasilia , Brasilia , Brazil.,b Faculty of Ceilandia , University of Brasilia , Brasilia , Brazil
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20
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Lichtenstein D, Meyer T, Böhmert L, Juling S, Fahrenson C, Selve S, Thünemann A, Meijer J, Estrela-Lopis I, Braeuning A, Lampen A. Dosimetric Quantification of Coating-Related Uptake of Silver Nanoparticles. Langmuir 2017; 33:13087-13097. [PMID: 28918629 DOI: 10.1021/acs.langmuir.7b01851] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The elucidation of mechanisms underlying the cellular uptake of nanoparticles (NPs) is an important topic in nanotoxicological research. Most studies dealing with silver NP uptake provide only qualitative data about internalization efficiency and do not consider NP-specific dosimetry. Therefore, we performed a comprehensive comparison of the cellular uptake of differently coated silver NPs of comparable size in different human intestinal Caco-2 cell-derived models to cover also the influence of the intestinal mucus barrier and uptake-specialized M-cells. We used a combination of the Transwell system, transmission electron microscopy, atomic absorption spectroscopy, and ion beam microscopy techniques. The computational in vitro sedimentation, diffusion, and dosimetry (ISDD) model was used to determine the effective dose of the particles in vitro based on their individual physicochemical characteristics. Data indicate that silver NPs with a similar size and shape show coating-dependent differences in their uptake into Caco-2 cells. The internalization of silver NPs was enhanced in uptake-specialized M-cells while the mucus did not provide a substantial barrier for NP internalization. ISDD modeling revealed a fivefold underestimation of dose-response relationships of NPs in in vitro assays. In summary, the present study provides dosimetry-adjusted quantitative data about the influence of NP coating materials in cellular uptake into human intestinal cells. Underestimation of particle effects in vitro might be prevented by using dosimetry models and by considering cell models with greater proximity to the in vivo situation, such as the M-cell model.
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Affiliation(s)
- Dajana Lichtenstein
- Department of Food Safety, German Federal Institute for Risk Assessment , Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Thomas Meyer
- Institute for Medical Physics and Biophysics, Leipzig University , Härtelstraße 16-18, 04107 Leipzig, Germany
| | - Linda Böhmert
- Department of Food Safety, German Federal Institute for Risk Assessment , Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Sabine Juling
- Department of Food Safety, German Federal Institute for Risk Assessment , Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Christoph Fahrenson
- ZELMI, Technical University Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Sören Selve
- ZELMI, Technical University Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Andreas Thünemann
- German Federal Institute for Materials Research and Testing , Unter den Eichen 87, 12205 Berlin, Germany
| | - Jan Meijer
- Nuclear Solid State Physics, Leipzig University , Linnéstraße 5, 04103 Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute for Medical Physics and Biophysics, Leipzig University , Härtelstraße 16-18, 04107 Leipzig, Germany
| | - Albert Braeuning
- Department of Food Safety, German Federal Institute for Risk Assessment , Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Alfonso Lampen
- Department of Food Safety, German Federal Institute for Risk Assessment , Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
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21
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Sieg H, Kästner C, Krause B, Meyer T, Burel A, Böhmert L, Lichtenstein D, Jungnickel H, Tentschert J, Laux P, Braeuning A, Estrela-Lopis I, Gauffre F, Fessard V, Meijer J, Luch A, Thünemann AF, Lampen A. Impact of an Artificial Digestion Procedure on Aluminum-Containing Nanomaterials. Langmuir 2017; 33:10726-10735. [PMID: 28903564 DOI: 10.1021/acs.langmuir.7b02729] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Aluminum has gathered toxicological attention based on relevant human exposure and its suspected hazardous potential. Nanoparticles from food supplements or food contact materials may reach the human gastrointestinal tract. Here, we monitored the physicochemical fate of aluminum-containing nanoparticles and aluminum ions when passaging an in vitro model of the human gastrointestinal tract. Small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), ion beam microscopy (IBM), secondary ion beam mass spectrometry (TOF-SIMS), and inductively coupled plasma mass spectrometry (ICP-MS) in the single-particle mode were employed to characterize two aluminum-containing nanomaterials with different particle core materials (Al0, γAl2O3) and soluble AlCl3. Particle size and shape remained unchanged in saliva, whereas strong agglomeration of both aluminum nanoparticle species was observed at low pH in gastric fluid together with an increased ion release. The levels of free aluminum ions decreased in intestinal fluid and the particles deagglomerated, thus liberating primary particles again. Dissolution of nanoparticles was limited and substantial changes of their shape and size were not detected. The amounts of particle-associated phosphorus, chlorine, potassium, and calcium increased in intestinal fluid, as compared to nanoparticles in standard dispersion. Interestingly, nanoparticles were found in the intestinal fluid after addition of ionic aluminum. We provide a comprehensive characterization of the fate of aluminum nanoparticles in simulated gastrointestinal fluids, demonstrating that orally ingested nanoparticles probably reach the intestinal epithelium. The balance between dissolution and de novo complex formation should be considered when evaluating nanotoxicological experiments.
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Affiliation(s)
- Holger Sieg
- German Federal Institute for Risk Assessment , Department of Food Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Claudia Kästner
- Bundesanstalt für Materialforschung und -prüfung (BAM) , Unter den Eichen 87, 12205 Berlin, Germany
| | - Benjamin Krause
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Thomas Meyer
- Institute of Medical Physics and Biophysics, Leipzig University , Härtelstrasse 16-18, 04275 Leipzig, Germany
| | - Agnès Burel
- Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, Université de Rennes, 35700 Rennes, France
| | - Linda Böhmert
- German Federal Institute for Risk Assessment , Department of Food Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Dajana Lichtenstein
- German Federal Institute for Risk Assessment , Department of Food Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Harald Jungnickel
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Jutta Tentschert
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Peter Laux
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Albert Braeuning
- German Federal Institute for Risk Assessment , Department of Food Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, Leipzig University , Härtelstrasse 16-18, 04275 Leipzig, Germany
| | - Fabienne Gauffre
- Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, Université de Rennes, 35700 Rennes, France
| | - Valérie Fessard
- Fougères Laboratory, Toxicology of contaminants unit, ANSES, French Agency for Food, Environmental and Occupational Health and Safety, 10B rue Claude Bourgelat, 35306 Cedex, Fougères, France
| | - Jan Meijer
- Felix Bloch Institute for Solid State Physics, Leipzig University , Linnéstraße 5, 04103 Leipzig, Germany
| | - Andreas Luch
- German Federal Institute for Risk Assessment , Department of Chemical and Product Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Andreas F Thünemann
- Bundesanstalt für Materialforschung und -prüfung (BAM) , Unter den Eichen 87, 12205 Berlin, Germany
| | - Alfonso Lampen
- German Federal Institute for Risk Assessment , Department of Food Safety, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
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22
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Tentschert J, Laux P, Jungnickel H, Brunner J, Krause B, Estrela-Lopis I, Merker C, Meijer J, Ernst H, Ma-Hock L, Keller J, Landsiedel R, Luch A. Long-term low-dose exposure study of inhaled cerium dioxide – Organ burden quantification and pattern of particle distribution in organs. Toxicol Lett 2017. [DOI: 10.1016/j.toxlet.2017.08.037] [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: 11/16/2022]
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23
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Chaves NL, Estrela-Lopis I, Böttner J, Lopes CAP, Guido BC, de Sousa AR, Báo SN. Exploring cellular uptake of iron oxide nanoparticles associated with rhodium citrate in breast cancer cells. Int J Nanomedicine 2017; 12:5511-5523. [PMID: 28814867 PMCID: PMC5546771 DOI: 10.2147/ijn.s141582] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [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] [Indexed: 12/15/2022] Open
Abstract
Nanocarriers have the potential to improve the therapeutic index of currently available drugs by improving their efficacy and achieving therapeutic steady-state levels over an extended period. The association of maghemite-rhodium citrate (MRC) nanoparticles (NPs) has the potential to increase specificity of the cytotoxic action. However, the interaction of these NPs with cells, their uptake mechanism, and subcellular localization need to be elucidated. This work evaluates the uptake mechanism of MRC NPs in metastatic and nonmetastatic breast cancer-cell models, comparing them to a nontumor cell line. MRC NPs uptake in breast cancer cells was more effective than in normal cells, with regard to both the amount of internalized material and the achievement of more strategic intracellular distribution. Moreover, this process occurred through a clathrin-dependent endocytosis pathway with different basal expression levels of this protein in the cell lines tested.
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Affiliation(s)
- Natalia L Chaves
- Institute of Biological Sciences, Department of Cell Biology, University of Brasília (UnB), Brasília, Brazil
| | - Irina Estrela-Lopis
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Julia Böttner
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Cláudio AP Lopes
- Institute of Biological Sciences, Department of Cell Biology, University of Brasília (UnB), Brasília, Brazil
| | - Bruna C Guido
- Institute of Biological Sciences, Department of Cell Biology, University of Brasília (UnB), Brasília, Brazil
| | | | - Sônia N Báo
- Institute of Biological Sciences, Department of Cell Biology, University of Brasília (UnB), Brasília, Brazil
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Laux P, Riebeling C, Booth AM, Brain JD, Brunner J, Cerrillo C, Creutzenberg O, Estrela-Lopis I, Gebel T, Johanson G, Jungnickel H, Kock H, Tentschert J, Tlili A, Schäffer A, Sips AJAM, Yokel RA, Luch A. Biokinetics of Nanomaterials: the Role of Biopersistence. NanoImpact 2017; 6:69-80. [PMID: 29057373 PMCID: PMC5645051 DOI: 10.1016/j.impact.2017.03.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Nanotechnology risk management strategies and environmental regulations continue to rely on hazard and exposure assessment protocols developed for bulk materials, including larger size particles, while commercial application of nanomaterials (NMs) increases. In order to support and corroborate risk assessment of NMs for workers, consumers, and the environment it is crucial to establish the impact of biopersistence of NMs at realistic doses. In the future, such data will allow a more refined future categorization of NMs. Despite many experiments on NM characterization and numerous in vitro and in vivo studies, several questions remain unanswered including the influence of biopersistence on the toxicity of NMs. It is unclear which criteria to apply to characterize a NM as biopersistent. Detection and quantification of NMs, especially determination of their state, i.e., dissolution, aggregation, and agglomeration within biological matrices and other environments are still challenging tasks; moreover mechanisms of nanoparticle (NP) translocation and persistence remain critical gaps. This review summarizes the current understanding of NM biokinetics focusing on determinants of biopersistence. Thorough particle characterization in different exposure scenarios and biological matrices requires use of suitable analytical methods and is a prerequisite to understand biopersistence and for the development of appropriate dosimetry. Analytical tools that potentially can facilitate elucidation of key NM characteristics, such as ion beam microscopy (IBM) and time-of-flight secondary ion mass spectrometry (ToF-SIMS), are discussed in relation to their potential to advance the understanding of biopersistent NM kinetics. We conclude that a major requirement for future nanosafety research is the development and application of analytical tools to characterize NPs in different exposure scenarios and biological matrices.
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Affiliation(s)
- Peter Laux
- German Federal Institute for Risk Assessment, Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Christian Riebeling
- German Federal Institute for Risk Assessment, Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Andy M Booth
- SINTEF Materials and Chemistry, Trondheim N-7465, Norway
| | - Joseph D Brain
- Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Josephine Brunner
- German Federal Institute for Risk Assessment, Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | | | - Otto Creutzenberg
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Department of Inhalation Toxicology, Nikolai Fuchs Strasse 1, 30625 Hannover, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics & Biophysics, Leipzig University, Härtelstraße 16, 04107 Leipzig, Germany
| | - Thomas Gebel
- German Federal Institute for Occupational Safety and Health (BAuA), Friedrich-Henkel-Weg 1-25, 44149 Dortmund, Germany
| | - Gunnar Johanson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Harald Jungnickel
- German Federal Institute for Risk Assessment, Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Heiko Kock
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Department of Inhalation Toxicology, Nikolai Fuchs Strasse 1, 30625 Hannover, Germany
| | - Jutta Tentschert
- German Federal Institute for Risk Assessment, Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
| | - Ahmed Tlili
- Department of Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
| | - Andreas Schäffer
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| | - Adriënne J A M Sips
- National Institute for Public Health & the Environment (RIVM), Bilthoven, The Netherlands
| | - Robert A Yokel
- Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Andreas Luch
- German Federal Institute for Risk Assessment, Department of Chemical and Product Safety, Max-Dohrn-Strasse 8-10, 10589 Berlin, Germany
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25
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Lichtenstein D, Ebmeyer J, Meyer T, Behr AC, Kästner C, Böhmert L, Juling S, Niemann B, Fahrenson C, Selve S, Thünemann AF, Meijer J, Estrela-Lopis I, Braeuning A, Lampen A. It takes more than a coating to get nanoparticles through the intestinal barrier in vitro. Eur J Pharm Biopharm 2016; 118:21-29. [PMID: 27993735 DOI: 10.1016/j.ejpb.2016.12.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 07/13/2016] [Revised: 12/02/2016] [Accepted: 12/14/2016] [Indexed: 12/18/2022]
Abstract
Size and shape are crucial parameters which have impact on the potential of nanoparticles to penetrate cell membranes and epithelial barriers. Current research in nanotoxicology additionally focuses on particle coating. To distinguish between core- and coating-related effects in nanoparticle uptake and translocation, two nanoparticles equal in size, coating and charge but different in core material were investigated. Silver and iron oxide nanoparticles coated with poly (acrylic acid) were chosen and extensively characterized by small-angle x-ray scattering, nanoparticle tracing analysis and transmission electron microscopy (TEM). Uptake and transport were studied in the intestinal Caco-2 model in a Transwell system with subsequent elemental analysis. TEM and ion beam microscopy were conducted for particle visualization. Although equal in size, charge and coating, the behavior of the two particles in Caco-2 cells was different: while the internalized amount was comparable, only iron oxide nanoparticles additionally passed the epithelium. Our findings suggest that the coating material influenced only the uptake of the nanoparticles whereas the translocation was determined by the core material. Knowledge about the different roles of the particle coating and core materials in crossing biological barriers will facilitate toxicological risk assessment of nanoparticles and contribute to the optimization of pharmacokinetic properties of nano-scaled pharmaceuticals.
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Affiliation(s)
- Dajana Lichtenstein
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany.
| | - Johanna Ebmeyer
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Thomas Meyer
- Institute for Medical Physics & Biophysics, Leipzig University, Härtelstraße 16-18, 04107 Leipzig, Germany
| | - Anne-Cathrin Behr
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Claudia Kästner
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany
| | - Linda Böhmert
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Sabine Juling
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Birgit Niemann
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Christoph Fahrenson
- ZELMI, Technical University Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Sören Selve
- ZELMI, Technical University Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Andreas F Thünemann
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany
| | - Jan Meijer
- Nuclear Solid State Physics, Leipzig University, 04103 Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute for Medical Physics & Biophysics, Leipzig University, Härtelstraße 16-18, 04107 Leipzig, Germany
| | - Albert Braeuning
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
| | - Alfonso Lampen
- German Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany
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Kosacka J, Baum P, Estrela-Lopis I, Stockinger M, Klöting N, Blüher M, Classen J, Thiery J, Bechmann I, Toyka K, Nowicki M. The role of nerve inflammation and exogenous iron load in experimental peripheral diabetic neuropathy (PDN). DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1584109] [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: 10/21/2022]
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27
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Collins AR, Annangi B, Rubio L, Marcos R, Dorn M, Merker C, Estrela-Lopis I, Cimpan MR, Ibrahim M, Cimpan E, Ostermann M, Sauter A, Yamani NE, Shaposhnikov S, Chevillard S, Paget V, Grall R, Delic J, de-Cerio FG, Suarez-Merino B, Fessard V, Hogeveen KN, Fjellsbø LM, Pran ER, Brzicova T, Topinka J, Silva MJ, Leite PE, Ribeiro AR, Granjeiro JM, Grafström R, Prina-Mello A, Dusinska M. High throughput toxicity screening and intracellular detection of nanomaterials. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2016; 9. [PMID: 27273980 PMCID: PMC5215403 DOI: 10.1002/wnan.1413] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/08/2016] [Accepted: 04/12/2016] [Indexed: 12/25/2022]
Abstract
With the growing numbers of nanomaterials (NMs), there is a great demand for rapid and reliable ways of testing NM safety—preferably using in vitro approaches, to avoid the ethical dilemmas associated with animal research. Data are needed for developing intelligent testing strategies for risk assessment of NMs, based on grouping and read‐across approaches. The adoption of high throughput screening (HTS) and high content analysis (HCA) for NM toxicity testing allows the testing of numerous materials at different concentrations and on different types of cells, reduces the effect of inter‐experimental variation, and makes substantial savings in time and cost. HTS/HCA approaches facilitate the classification of key biological indicators of NM‐cell interactions. Validation of in vitroHTS tests is required, taking account of relevance to in vivo results. HTS/HCA approaches are needed to assess dose‐ and time‐dependent toxicity, allowing prediction of in vivo adverse effects. Several HTS/HCA methods are being validated and applied for NM testing in the FP7 project NANoREG, including Label‐free cellular screening of NM uptake, HCA, High throughput flow cytometry, Impedance‐based monitoring, Multiplex analysis of secreted products, and genotoxicity methods—namely High throughput comet assay, High throughput in vitro micronucleus assay, and γH2AX assay. There are several technical challenges with HTS/HCA for NM testing, as toxicity screening needs to be coupled with characterization of NMs in exposure medium prior to the test; possible interference of NMs with HTS/HCA techniques is another concern. Advantages and challenges of HTS/HCA approaches in NM safety are discussed. WIREs Nanomed Nanobiotechnol 2017, 9:e1413. doi: 10.1002/wnan.1413 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Andrew R Collins
- Comet Biotech AS, and Department of Nutrition, University of Oslo, Norway
| | | | - Laura Rubio
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Ricard Marcos
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain.,CIBER Epidemiología y Salud Pública, ISCIII, Spain
| | - Marco Dorn
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Carolin Merker
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Mihaela Roxana Cimpan
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Mohamed Ibrahim
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Emil Cimpan
- Department of Electrical Engineering, Faculty of Engineering, Bergen University College, Norway
| | - Melanie Ostermann
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Alexander Sauter
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Naouale El Yamani
- Comet Biotech AS, and Department of Nutrition, University of Oslo, Norway.,Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | | | - Sylvie Chevillard
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Vincent Paget
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Romain Grall
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Jozo Delic
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | | | | | - Valérie Fessard
- ANSES Fougères Laboratory, Contaminant Toxicology Unit, France
| | | | - Lise Maria Fjellsbø
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | - Elise Runden Pran
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | - Tana Brzicova
- Institute of Experimental Medicine AS CR, Prague, Czech Republic
| | - Jan Topinka
- Institute of Experimental Medicine AS CR, Prague, Czech Republic
| | - Maria João Silva
- Human Genetics Department, National Institute of Health Doutor Ricardo Jorge and Centre for Toxicogenomics and Human Health, NMS/FCM, UNL, Lisbon, Portugal
| | - P E Leite
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - A R Ribeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - J M Granjeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - Roland Grafström
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Adriele Prina-Mello
- Nanomedicine Group, Trinity Centre for Health Sciences, Trinity College Dublin, Dublin, Ireland
| | - Maria Dusinska
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
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Fleddermann J, Diamanti E, Azinas S, Košutić M, Dähne L, Estrela-Lopis I, Amacker M, Donath E, Moya SE. Virosome engineering of colloidal particles and surfaces: bioinspired fusion to supported lipid layers. Nanoscale 2016; 8:7933-7941. [PMID: 27006101 DOI: 10.1039/c5nr08169f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Immunostimulating reconstituted influenza virosomes (IRIVs) are liposomes with functional viral envelope glycoproteins: influenza virus hemagglutinin (HA) and neuraminidase intercalated in the phospholipid bilayer. Here we address the fusion of IRIVs to artificial supported lipid membranes assembled on polyelectrolyte multilayers on both colloidal particles and planar substrates. The R18 assay is used to prove the IRIV fusion in dependence of pH, temperature and HA concentration. IRIVs display a pH-dependent fusion mechanism, fusing at low pH in analogy to the influenza virus. The pH dependence is confirmed by the Quartz Crystal Microbalance technique. Atomic Force Microscopy imaging shows that at low pH virosomes are integrated in the supported membrane displaying flattened features and a reduced vertical thickness. Virosome fusion offers a new strategy for transferring biological functions on artificial supported membranes with potential applications in targeted delivery and sensing.
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Affiliation(s)
- J Fleddermann
- Institute of Medical Physics and Biophysics, Faculty of Medicine, University of Leipzig, 04107 Leipzig, Germany
| | - E Diamanti
- Soft Matter Nanotechnology Group, CIC biomaGUNE, Paseo Miramón 182 C, 20009 San Sebastián, Guipúzcoa, Spain.
| | - S Azinas
- Biosurfaces Group, CIC biomaGUNE, Paseo Miramón 182 C, 20009 San Sebastián, Guipúzcoa, Spain and Structural Biology Unit, CIC bioGUNE Technological Park, Bld 800 48160 Derio, Vizcaya, Spain
| | - M Košutić
- Soft Matter Nanotechnology Group, CIC biomaGUNE, Paseo Miramón 182 C, 20009 San Sebastián, Guipúzcoa, Spain.
| | - L Dähne
- Surflay Nanotec GmbH, Max Planck Str.3, 12489 Berlin, Germany
| | - I Estrela-Lopis
- Institute of Medical Physics and Biophysics, Faculty of Medicine, University of Leipzig, 04107 Leipzig, Germany
| | - M Amacker
- Mymetics SA, Route de la Corniche 4, 1066 Epalinges, Switzerland
| | - E Donath
- Institute of Medical Physics and Biophysics, Faculty of Medicine, University of Leipzig, 04107 Leipzig, Germany
| | - S E Moya
- Soft Matter Nanotechnology Group, CIC biomaGUNE, Paseo Miramón 182 C, 20009 San Sebastián, Guipúzcoa, Spain.
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Baum P, Kosacka J, Estrela-Lopis I, Woidt K, Serke H, Paeschke S, Stockinger M, Klöting N, Blüher M, Dorn M, Classen J, Thiery J, Bechmann I, Toyka KV, Nowicki M. The role of nerve inflammation and exogenous iron load in experimental peripheral diabetic neuropathy (PDN). Metabolism 2016; 65:391-405. [PMID: 26975531 DOI: 10.1016/j.metabol.2015.11.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 10/26/2015] [Accepted: 11/04/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Iron is an essential but potentially toxic metal in mammals. Here we investigated a pathogenic role of exogenous iron in peripheral diabetic neuropathy (PDN) in an animal model for type 1 diabetes. METHODS Diabetes was induced by a single injection of streptozotocin (STZ) in 4-month-old Sprague-Dawley rats. STZ-diabetic rats and non-diabetic rats were fed with high, standard, or low iron diet. After three months of feeding, animals were tested. RESULTS STZ-rats on standard iron diet showed overt diabetes, slowed motor nerve conduction, marked degeneration of distal intraepidermal nerve fibers, mild intraneural infiltration with macrophages and T-cells in the sciatic nerve, and increased iron levels in serum and dorsal root ganglion (DRG) neurons. While motor fibers were afflicted in all STZ-groups, only a low iron-diet led also to reduced sensory conduction velocities in the sciatic nerve. In addition, only STZ-rats on a low iron diet showed damaged mitochondria in numerous DRG neurons, a more profound intraepidermal nerve fiber degeneration indicating small fiber neuropathy, and even more inflammatory cells in sciatic nerves than seen in any other experimental group. CONCLUSIONS These results indicate that dietary iron-deficiency rather than iron overload, and mild inflammation may both promote neuropathy in STZ-induced experimental PDN.
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Affiliation(s)
- Petra Baum
- Department of Neurology, University Hospital Leipzig, Liebigstr. 20, D-04103 Leipzig, Germany
| | - Joanna Kosacka
- Department of Medicine, University of Leipzig, Liebigstr. 21, D-04103 Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, D-04107 Leipzig, Germany
| | - Katrin Woidt
- Institute of Anatomy, University of Leipzig, Liebigstr. 13, D-04103 Leipzig, Germany
| | - Heike Serke
- Institute of Anatomy, University of Leipzig, Liebigstr. 13, D-04103 Leipzig, Germany
| | - Sabine Paeschke
- Department of Medicine, University of Leipzig, Liebigstr. 21, D-04103 Leipzig, Germany
| | - Maximilian Stockinger
- Department of Neurology, University Hospital Leipzig, Liebigstr. 20, D-04103 Leipzig, Germany
| | - Nora Klöting
- Department of Medicine, University of Leipzig, Liebigstr. 21, D-04103 Leipzig, Germany; Integrated Research and Treatment Center (IFB) Adiposity Disease, Liebigstr. 21, D-04103 Leipzig, Germany
| | - Matthias Blüher
- Department of Medicine, University of Leipzig, Liebigstr. 21, D-04103 Leipzig, Germany
| | - Marco Dorn
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, D-04107 Leipzig, Germany
| | - Joseph Classen
- Department of Neurology, University Hospital Leipzig, Liebigstr. 20, D-04103 Leipzig, Germany
| | - Joachim Thiery
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics (ILM), University of Leipzig, Liebigstr. 27, D-04103 Leipzig, Germany
| | - Ingo Bechmann
- Institute of Anatomy, University of Leipzig, Liebigstr. 13, D-04103 Leipzig, Germany
| | - Klaus V Toyka
- Department of Neurology, University of Würzburg, Josef-Schneider-Str. 11, D-97080 Würzburg, Germany
| | - Marcin Nowicki
- Institute of Anatomy, University of Leipzig, Liebigstr. 13, D-04103 Leipzig, Germany.
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30
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Qiu Y, Rojas E, Murray RA, Irigoyen J, Gregurec D, Castro-Hartmann P, Fledderman J, Estrela-Lopis I, Donath E, Moya SE. Cell uptake, intracellular distribution, fate and reactive oxygen species generation of polymer brush engineered CeO(2-x) NPs. Nanoscale 2015; 7:6588-6598. [PMID: 25789459 DOI: 10.1039/c5nr00884k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cerium Oxide nanoparticles (CeO(2-x) NPs) are modified with polymer brushes of negatively charged poly (3-sulfopropylmethacrylate) (PSPM) and positively charged poly (2-(methacryloyloxy)ethyl-trimethylammonium chloride) (PMETAC) by Atom Transfer Radical Polymerisation (ATRP). CeO(2-x) NPs are fluorescently labelled by covalently attaching Alexa Fluor® 488/Fluorescein isothiocyanate to the NP surface prior to polymerisation. Cell uptake, intracellular distribution and the impact on the generation of intracellular Reactive Oxygen Species (ROS) with respect to CeO(2-x) NPs are studied by means of Raman Confocal Microscopy (CRM), Transmission Electron Microscopy (TEM) and Inductively Coupled Plasma Mass Spectroscopy (ICP-MS). PSPM and PMETAC coated CeO(2-x) NPs show slower and less uptake compared to uncoated Brush modified NPs display a higher degree of co-localisation with cell endosomes and lysosomes after 24 h of incubation. They also show higher co-localisation with lipid bodies when compared to unmodified CeO(2-x) NPs. The brush coating does not prevent CeO(2-x) NPs from displaying antioxidant properties.
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Affiliation(s)
- Yuan Qiu
- Soft Matter Nanotechnology Laboratory, CIC biomaGune, Paseo Miramón 182 C, 20009, San Sebastián, Spain.
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31
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Yu D, Zou G, Cui X, Mao Z, Estrela-Lopis I, Donath E, Gao C. Monitoring the intracellular transformation process of surface-cleavable PLGA particles containing disulfide bonds by fluorescence resonance energy transfer. J Mater Chem B 2015; 3:8865-8873. [DOI: 10.1039/c5tb01687h] [Citation(s) in RCA: 9] [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: 12/28/2022]
Abstract
The FRET technique was used to quantify the surface cleavage kinetics of PLGA particles containing disulfide bonds in cells.
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Affiliation(s)
- Dahai Yu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Guangyang Zou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Xiaojing Cui
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Irina Estrela-Lopis
- Institute of Medical Physics & Biophysics
- Leipzig University
- 04107 Leipzig
- Germany
| | - Edwin Donath
- Institute of Medical Physics & Biophysics
- Leipzig University
- 04107 Leipzig
- Germany
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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Školová B, Hudská K, Pullmannová P, Kováčik A, Palát K, Roh J, Fleddermann J, Estrela-Lopis I, Vávrová K. Different Phase Behavior and Packing of Ceramides with Long (C16) and Very Long (C24) Acyls in Model Membranes: Infrared Spectroscopy Using Deuterated Lipids. J Phys Chem B 2014; 118:10460-70. [DOI: 10.1021/jp506407r] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Barbora Školová
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
- Institute
of Medical Physics and Biophysics, University of Leipzig, Härtelstrasse
16-18, 04275 Leipzig, Germany
| | - Klára Hudská
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
| | - Petra Pullmannová
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
| | - Andrej Kováčik
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
| | - Karel Palát
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
| | - Jaroslav Roh
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
| | - Jana Fleddermann
- Institute
of Medical Physics and Biophysics, University of Leipzig, Härtelstrasse
16-18, 04275 Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute
of Medical Physics and Biophysics, University of Leipzig, Härtelstrasse
16-18, 04275 Leipzig, Germany
| | - Kateřina Vávrová
- Skin
Barrier Research Group, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 50005 Hradec Králové, Czech Republic
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Zhou X, Dorn M, Vogt J, Spemann D, Yu W, Mao Z, Estrela-Lopis I, Donath E, Gao C. A quantitative study of the intracellular concentration of graphene/noble metal nanoparticle composites and their cytotoxicity. Nanoscale 2014; 6:8535-8542. [PMID: 24962780 DOI: 10.1039/c4nr01763c] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Noble-metal nanoparticles (NPs) especially prepared from gold and silver have been combined on the surface of graphene to obtain graphene-based nanocomposites for novel functions in enhanced performance in bio-imaging, cancer detection and therapy. However, little is known about their cellular uptake, especially the intracellular quantity which plays a critical role in determining their functions and safety. Therefore, we prepared covalently conjugated GO/Au and GO/Ag composites by immobilizing Au and Ag nanoparticles on GO sheets pre-functionalized with disulfide bonds, respectively. The cellular uptake of these composites was quantitatively studied by means of an ion beam microscope (IBM) to determine the metal content in human lung cancer cells (A549 cells) and liver hepatocellular carcinoma cells (HepG2 cells). The cell uptake was also studied by inductively coupled plasma mass spectrometry (ICP-MS), which is one of the most sensitive techniques being applied to cell suspensions, for comparison. Toxicity, one of the consequences of cellular uptake of GO based composites, was studied as well. The potential toxicity mechanism was also suggested based on the results of intracellular quantification of the nanomaterials.
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Affiliation(s)
- Xiangyan Zhou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
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Romero G, Ochoteco O, Sanz DJ, Estrela-Lopis I, Donath E, Moya SE. Poly(Lactide-co
-Glycolide) Nanoparticles, Layer by Layer Engineered for the Sustainable Delivery of AntiTNF-α. Macromol Biosci 2013; 13:903-12. [DOI: 10.1002/mabi.201200478] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Revised: 03/09/2013] [Indexed: 12/31/2022]
Affiliation(s)
- Gabriela Romero
- CIC biomaGUNE; Paseo Miramón 182 C; 20009 San Sebastian Gipuzkoa, Spain
| | - Olaia Ochoteco
- CIC biomaGUNE; Paseo Miramón 182 C; 20009 San Sebastian Gipuzkoa, Spain
| | - David J. Sanz
- CIC biomaGUNE; Paseo Miramón 182 C; 20009 San Sebastian Gipuzkoa, Spain
| | - Irina Estrela-Lopis
- Institute of Biophysics and Medical Physics; University of Leipzig; Leipzig Germany
| | - Edwin Donath
- Institute of Biophysics and Medical Physics; University of Leipzig; Leipzig Germany
| | - Sergio E. Moya
- CIC biomaGUNE; Paseo Miramón 182 C; 20009 San Sebastian Gipuzkoa, Spain
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Romero G, Estrela-Lopis I, Rojas E, Llarena I, Donath E, Moya SE. Lipid/Polyelectrolyte coatings to control carbon nanotubes intracellular distribution. J Nanosci Nanotechnol 2012; 12:4836-4842. [PMID: 22905538 DOI: 10.1166/jnn.2012.4949] [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] [Indexed: 06/01/2023]
Abstract
Carbon Nanotubes have been functionalized with a layer of poly (sulfopropyl methacrylate) synthesized from silane initiators attached to the walls of the Carbon nanotubes. On top of the poly sulfo propyl methacrylate, lipid vesicles composed of 75% 1,2-Dioleoyl-sn-Glycero-3-Phosphocholine and 25% 1,2-Dioleoyl-sn-Glycero-3-[Phospho-L-Serine] were assembled. The surface modification of the Carbon Nanotubes and lipid assembly were followed by TEM. Confocal Raman Microscopy was used to study the uptake and localization of the surface modified Carbon Nanotubes in the HepG2 cell line. The localization of the Carbon Nanotubes in the cells was affected by the surface coating. It was found that poly (sulfopropyl methacrylate) and lipid modified Carbon Nanotubes were present in the region of the lipid bodies in the cytoplasm.
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Affiliation(s)
- G Romero
- CIC biomaGUNE, Paseo Miramón 182 C, 20006 San Sebastian, Gipuzkoa, Spain
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36
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Estrela-Lopis I, Romero G, Rojas E, Moya SE, Donath E. Nanoparticle uptake and their co-localization with cell compartments – a confocal Raman microscopy study at single cell level. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/304/1/012017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [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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37
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Lozano T, Rey M, Rojas E, Moya S, Fleddermann J, Estrela-Lopis I, Donath E, Wang B, Mao Z, Gao C, González-Fernández Á. Cytotoxicity effects of metal oxide nanoparticles in human tumor cell lines. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/304/1/012046] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [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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38
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Romero G, Rojas E, Estrela-Lopis I, Donath E, Moya SE. Spontaneous confocal Raman microscopy--a tool to study the uptake of nanoparticles and carbon nanotubes into cells. Nanoscale Res Lett 2011; 6:429. [PMID: 21711493 PMCID: PMC3211846 DOI: 10.1186/1556-276x-6-429] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 06/16/2011] [Indexed: 05/23/2023]
Abstract
Confocal Raman microscopy as a label-free technique was applied to study the uptake and internalization of poly(lactide-co-glycolide) (PLGA) nanoparticles (NPs) and carbon nanotubes (CNTs) into hepatocarcinoma human HepG2 cells. Spontaneous confocal Raman spectra was recorded from the cells exposed to oxidized CNTs and to PLGA NPs. The Raman spectra showed bands arising from the cellular environment: lipids, proteins, nucleic acids, as well as bands characteristic for either PLGA NPs or CNTs. The simultaneous generation of Raman bands from the cell and nanomaterials from the same spot proves internalization, and also indicates the cellular region, where the nanomaterial is located. For PLGA NPs, it was found that they preferentially co-localized with lipid bodies, while the oxidized CNTs are located in the cytoplasm.
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Affiliation(s)
- Gabriela Romero
- CIC biomaGUNE, Paseo Miramón 182 C, 20009 San Sebastian, Spain
| | - Elena Rojas
- CIC biomaGUNE, Paseo Miramón 182 C, 20009 San Sebastian, Spain
| | - Irina Estrela-Lopis
- Institute of Biophysics and Medical Physics, University of Leipzig Härtelstraße 16-18, D-04107 Leipzig, Germany
| | - Edwin Donath
- Institute of Biophysics and Medical Physics, University of Leipzig Härtelstraße 16-18, D-04107 Leipzig, Germany
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Buschner M, Estrela-Lopis I, Kuhn H, Donath E, Wirtz H. In-vitro-Wirkung von Nanopartikeln auf Typ II-Zellen der Lunge. Pneumologie 2011. [DOI: 10.1055/s-0030-1270377] [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: 10/18/2022]
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Romero G, Estrela-Lopis I, Zhou J, Rojas E, Franco A, Espinel CS, Fernández AG, Gao C, Donath E, Moya SE. Surface engineered Poly(lactide-co-glycolide) nanoparticles for intracellular delivery: uptake and cytotoxicity--a confocal raman microscopic study. Biomacromolecules 2010; 11:2993-9. [PMID: 20882998 DOI: 10.1021/bm1007822] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Confocal Raman Microscopy (CRM) is used to study the cell internalization of poly(lactide-co-glycolide) (PLGA) nanoparticles (NPs) fabricated by emulsion techniques with either poly(ethylene imine) (PEI) or bovine serum albumin (BSA) as surface stabilizers. HepG2 cells were exposed to PEI and BSA stabilized PLGA NPs. Spontaneous Confocal Raman Spectra taken in one and the same spot of exposed cells showed bands arising from the cellular environment as well as bands characteristic for PLGA, proving that the PLGA NPs have been internalized. It was found that PLGA NPs preferentially colocalize with lipid bodies. The results from Raman spectroscopy are compared with flow cytometry and confocal scanning laser microscopy (CLSM) data. The advantages of CRM as a label-free technique over flow cytometry and CLSM are discussed. Additionally, cell viability studies by means of quick cell counting solution and MTT tests in several cell lines show a generally low toxicity for both PEI and BSA stabilized PLGA NPs, with BSA stabilized PLGA NPs having an even lower toxicity than PEI stabilized.
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Affiliation(s)
- Gabriela Romero
- CIC BiomaGUNE, Paseo Miramón 182 Ed. Emp. C, San Sebastián, Spain, Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China, and Laboratorio de Inmunología, Edificio Ciencias Experimentales, Campus Lagoas Marcosende, Universidad de Vigo, CP 36310, Vigo, Pontevedra, Spain
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Estrela-Lopis I, Iturri Ramos JJ, Donath E, Moya SE. Spectroscopic Studies on the Competitive Interaction between Polystyrene Sodium Sulfonate with Polycations and the N-Tetradecyl Trimethyl Ammonium Bromide Surfactant. J Phys Chem B 2009; 114:84-91. [DOI: 10.1021/jp908608u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- I. Estrela-Lopis
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany, and CIC biomaGUNE, Paseo Miramón 182 Edificio Empresarial C, 20009 San Sebastian, Gipuzkoa, Spain
| | - J. J. Iturri Ramos
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany, and CIC biomaGUNE, Paseo Miramón 182 Edificio Empresarial C, 20009 San Sebastian, Gipuzkoa, Spain
| | - E. Donath
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany, and CIC biomaGUNE, Paseo Miramón 182 Edificio Empresarial C, 20009 San Sebastian, Gipuzkoa, Spain
| | - S. E. Moya
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany, and CIC biomaGUNE, Paseo Miramón 182 Edificio Empresarial C, 20009 San Sebastian, Gipuzkoa, Spain
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Estrela-Lopis I, Leporatti S, Typlt E, Clemens D, Donath E. Small angle neutron scattering investigations (SANS) of polyelectrolyte multilayer capsules templated on human red blood cells. Langmuir 2007; 23:7209-15. [PMID: 17516671 DOI: 10.1021/la700496c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Polyelectrolyte capsules were fabricated by layer-by-layer deposition of poly(styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) on glutardialdehyde fixed human erythrocytes and subsequent core dissolution using NaOCl as an oxidizing agent. SANS together with confocal laser scanning microscopy (CLSM) were applied to study capsule topology and interior as well as the layer thickness as a function of the deposition protocol, layer number, ionic concentration, and temperature treatment. The capsules contained various amounts of trapped polyelectrolyte. Retention depended on the order of polyelectrolyte deposition and layer number, which influenced layer permeability. The capsule wall thickness was found to be much smaller (3-4.5 nm in total) than what was known for polyelectrolyte multilayer walls, where every single layer contributes about 1.8 nm to the total thickness. NaCl (0.1 mM) caused a layer thickness decrease by 16%. Annealing at 70 degrees C induced capsule shrinking together with an increase of the wall thickness by 85% and wall density by 12%.
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Affiliation(s)
- Irina Estrela-Lopis
- Institute of Medical Physics and Biophysics, Leipzig University, D-04103 Leipzig, Germany.
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Estrela-Lopis I, Brezesinski G, Möhwald H. Miscibility of DPPC and DPPA in monolayers at the air/water interface. Chem Phys Lipids 2004; 131:71-80. [PMID: 15210366 DOI: 10.1016/j.chemphyslip.2004.04.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2003] [Revised: 03/23/2004] [Accepted: 04/05/2004] [Indexed: 10/26/2022]
Abstract
Monolayers of mixtures of 1,2-dipalmitoylphosphatidylcholine (DPPC) as the substrate and 1,2-dipalmitoylphosphatidic acid (DPPA) as the product of the hydrolysis reaction catalyzed by phospholipase D (PLD) were investigated in the presence of Ca2+. The miscibility behavior and the microstructure of mixed domains have been studied by grazing incidence X-ray diffraction (GIXD), Brewster angle microscopy and film balance measurements. The phase diagram reveals partial miscibility on both sides and a wide miscibility gap, which becomes narrower at high pressure. At low pressure, the segregation of condensed DPPA-rich domains in a fluid-like DPPC matrix was detected already at small DPPA concentrations and their structure was determined. A small amount of DPPC mixed into the segregated DPPA domains induces the transformation from rectangular to an oblique unit cell and increases the tilt angle in the condensed domains. At high pressure, two types of condensed phase domains were found: DPPC-rich and DPPA-rich. A drastic reduction of the tilt angle in the DPPC-rich domains with increasing amount of DPPA was observed. The decrease of the tilt angle must be connected with a change of the head group conformation of DPPC in such mixed domains.
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Affiliation(s)
- I Estrela-Lopis
- Institute for Medical Physics and Biophysics, University of Leipzig, Liebigstr. 27, D-04103 Leipzig, Germany
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Estrela-Lopis I, Brezesinski G, Möhwald H. Dipalmitoyl-phosphatidylcholine/phospholipase D interactions investigated with polarization-modulated infrared reflection absorption spectroscopy. Biophys J 2001; 80:749-54. [PMID: 11159442 PMCID: PMC1301273 DOI: 10.1016/s0006-3495(01)76054-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [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: 11/15/2022] Open
Abstract
The hydrolysis of 1,2-dipalmitoylphosphatidylcholine (DPPC) catalyzed by Streptomyces chromofuscus phospholipase D (PLD) has been investigated using monolayer techniques and polarization-modulated infrared absorption reflection spectroscopy. The spectroscopic analysis of the phosphate groups provides a quantitative estimation of the hydrolysis yield. The hydrolysis kinetics was investigated in dependence on the phase state of the lipid monolayer. It was found that PLD exhibits maximum activity in the liquid-expanded phase, whereas PLA2 has its activity maximum in the two-phase region. A lag phase was observed in all experiments indicating that small amounts of the hydrolysis product 1,2-dipalmitoylphosphatidic acid (DPPA) are needed for initiating the fast hydrolysis reaction. Higher concentrations of DPPA inhibit the hydrolysis. The critical inhibition concentration of DPPA is a function of the monolayer pressure.
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Affiliation(s)
- I Estrela-Lopis
- Max Planck Institute of Colloids and Interfaces, D-14476 Golm/Potsdam, Germany
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