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Kraus D, Wolfgarten M, Enkling N, Helfgen EH, Frentzen M, Probstmeier R, Winter J, Stark H. In-vitro cytocompatibility of dental resin monomers on osteoblast-like cells. J Dent 2017; 65:76-82. [PMID: 28711338 DOI: 10.1016/j.jdent.2017.07.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/06/2017] [Accepted: 07/10/2017] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVES Dental resin-based materials are widely used in modern dentistry. Especially, resin cements enjoy great popularity and are utilized in many applications. Nevertheless, monomers could be released from the resinous matrix, thus interact with surrounding tissues, cause adverse biological reactions and may lead in cases of implant retained restorations to peri-implant bone destruction. Hence, we performed an in-vitro study to determine cytotoxicity of resin monomers on osteoblast-like cells. METHODS Three permanent osteoblast-like cell lines from tumor origin (MG-63 and Saos-2) as well as immortalized human fetal osteoblasts (hFOB 1.19) were used and treated with different concentrations of the main monomers: BisGMA, UDMA, TEGDMA and HEMA. The impact on cell viability was monitored using three different cytotoxicity tests: alamarBlue, XTT, and LDH assay. Mean±SEM were calculated and statistical analysis was performed with GraphPad Prism software. RESULTS All monomers tested caused concentration dependent cytotoxic effects on the three investigated osteoblast-like cell lines. Although all three cell viability assays showed comparable results in cytotoxic ranking of the monomers (BisGMA > UDMA > TEGDMA > HEMA), higher differences in the absolute values were detected by the various test methods In addition, also a cell line dependent influence on cell viability could be identified with higher impact on the immortalized hFOB 1.19 cells compared to both osteosarcoma cell lines (MG-63, Saos-2). CONCLUSIONS Monomer concentrations detected in elution studies caused toxic effects in osteoblast-like cells. Although the results from in-vitro studies cannot be directly transferred to a clinical situation our results indicate that released monomers from composite resin cements may cause adverse biological effects and thereby possibly lead to conditions favoring peri-implantitis and bone destruction. CLINICAL SIGNIFICANCE The wide use of composite resin cements especially in implant-prosthetic treatments should be scrutinized to avoid possible clinical implications between eluted resin monomers and bone cells leading to conditions favoring peri-implantitis and bone destruction.
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Affiliation(s)
- Dominik Kraus
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Bonn, Germany.
| | - Markus Wolfgarten
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Bonn, Germany
| | - Norbert Enkling
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Bonn, Germany; Department of Reconstructive Dentistry and Gerodontology, University of Bern, Bern, Switzerland
| | - Ernst-Heinrich Helfgen
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Bonn, Germany
| | - Matthias Frentzen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Rainer Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, Bonn, Germany
| | - Jochen Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Helmut Stark
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Bonn, Germany
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52
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Gebreselassie HM, Kraus D, Fux CA, Haubitz S, Scherrer A, Hatz C, Veit O, Stoeckle M, Fehr J, de Lucia S, Cavassini M, Bernasconi E, Schmid P, Furrer H, Staehelin C. Ethnicity predicts viral rebound after travel to the tropics in HIV-infected travelers to the tropics in the Swiss HIV Cohort Study. HIV Med 2017; 18:564-572. [PMID: 28247589 DOI: 10.1111/hiv.12491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/23/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The number of HIV-infected individuals from developed countries travelling to tropical and subtropical areas has increased as a result of the clinical and survival benefits of combination antiretroviral therapy. The aim of our study was to describe the traveler population in the SHCS and to determine the frequency of viral rebound in virologically suppressed individuals after a travel episode to the tropics compared to non-travelers. METHODS Swiss HIV Cohort Study participants with at least one follow-up visit between 1 January 1989 and 28 February 2015 were eligible for inclusion in the study. The primary outcome was the occurrence of viral rebound (viral load > 200 HIV-1 RNA copies/mL) after a travel episode compared with a nontravel episode in previously suppressed individuals (≤ 200 copies/mL). All virologically suppressed patients contributed multiple travel or nontravel episodes to the analysis. Logistic regression was performed including factors associated with viral rebound. RESULTS We included 16 635 patients in the study, of whom 6084 (36.5%) had ever travelled to the tropics. Travel frequency increased over time, with travellers showing better HIV parameters than nontravellers [less advanced Centers for Disease Control and Prevention (CDC) stage and higher CD4 count nadir]. Viral rebound was seen in 477 (3.9%) of 12 265 travel episodes and in 5121 (4.5%) of 114 884 nontravel episodes [unadjusted odds ratio (OR) 0.87; 95% confidence interval (CI) 0.78-0.97]. Among these 477 post-travel viral rebounds, 115 had a resistance test performed and 51 (44%) of these showed new resistance mutations. Compared with European and North American patients, the odds for viral rebound were significantly lower in Southeast Asian (OR 0.67; 95% CI 0.51-0.88) and higher in sub-Saharan African (SSA) patients (OR 1.41; 95% CI 1.22-1.62). Travel further increased the odds of viral rebound in SSA patients (OR 2.00; 95% CI 1.53-2.61). CONCLUSIONS Region of origin is the main risk factor for viral rebound rather than travel per se. Pre-travel adherence counselling should focus on patients of SSA origin.
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Affiliation(s)
- H M Gebreselassie
- Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Switzerland
| | - D Kraus
- Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Switzerland.,Institute for Social and Preventive Medicine, Bern University, Bern, Switzerland.,Institute of Mathematics and Statistics, Masaryk University, Brno, Czech Republic
| | - C A Fux
- Department of Infectious Diseases and Hospital Hygiene, Kantonsspital Aarau, Aarau, Switzerland
| | - S Haubitz
- Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Switzerland.,Department of Infectious Diseases and Hospital Hygiene, Kantonsspital Aarau, Aarau, Switzerland
| | - A Scherrer
- Division of Infectious Diseases and Hospital Epidemiology, Zürich University Hospital, Zürich, Switzerland
| | - C Hatz
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,Institute for Epidemiology, Biostatistics and Prevention, University of Zürich, Zürich, Switzerland
| | - O Veit
- Institute for Epidemiology, Biostatistics and Prevention, University of Zürich, Zürich, Switzerland
| | - M Stoeckle
- Clinic for Infectious Diseases, University Hospital Basel, Basel, Switzerland
| | - J Fehr
- Division of Infectious Diseases and Hospital Epidemiology, Zürich University Hospital, Zürich, Switzerland
| | - S de Lucia
- Department of Infectious Diseases, Geneva University Hospital, Geneva, Switzerland
| | - M Cavassini
- Department of Infectious Diseases, Lausanne University Hospital, Lausanne, Switzerland
| | - E Bernasconi
- Department of Infectious Diseases, Lugano Regional Hospital, Lugano, Switzerland
| | - P Schmid
- Department of Infectious Diseases, St. Gallen Cantonal Hospital, St. Gallen, Switzerland
| | - H Furrer
- Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Switzerland
| | - C Staehelin
- Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Switzerland
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Reckenbeil J, Kraus D, Stark H, Rath-Deschner B, Jäger A, Wenghoefer M, Winter J, Götz W. Insulin-like growth factor 1 (IGF1) affects proliferation and differentiation and wound healing processes in an inflammatory environment with p38 controlling early osteoblast differentiation in periodontal ligament cells. Arch Oral Biol 2017; 73:142-150. [DOI: 10.1016/j.archoralbio.2016.10.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 08/31/2016] [Accepted: 10/11/2016] [Indexed: 12/21/2022]
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Reichelt J, Bär G, Poerschke F, Stark H, Enkling N, Kraus D. [Not Available]. Swiss Dent J 2017; 127:967-975. [PMID: 29199774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Joana Reichelt
- Departement für zahnärztliche Prothetik, Propädeutik und Werkstoffwissenschaften, Universität Bonn, Bonn, Deutschland
| | - German Bär
- DentalStudio Sankt Augustin GmbH, Deutschland
| | | | - Helmut Stark
- Departement für zahnärztliche Prothetik, Propädeutik und Werkstoffwissenschaften, Universität Bonn, Bonn, Deutschland
| | - Norbert Enkling
- Departement für zahnärztliche Prothetik, Propädeutik und Werkstoffwissenschaften, Universität Bonn, Bonn, Deutschland
- Klinik für Rekonstruktive Zahnmedizin und Gerodontologie, Universität Bern, Bern, Schweiz
| | - Dominik Kraus
- Departement für zahnärztliche Prothetik, Propädeutik und Werkstoffwissenschaften, Universität Bonn, Bonn, Deutschland
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55
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Reichelt J, Bär G, Poerschke F, Stark H, Enkling N, Kraus D. [Not Available]. Swiss Dent J 2017; 127:976-983. [PMID: 29199775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Joana Reichelt
- Département de dentisterie de restauration, de prosthodontie et de science des matériaux, Université Bonn, Bonn, Allemagne
| | - German Bär
- Laboratoire dentaire Sankt Augustin GmbH, Allemagne
| | | | - Helmut Stark
- Département de dentisterie de restauration, de prosthodontie et de science des matériaux, Université Bonn, Bonn, Allemagne
| | - Norbert Enkling
- Département de dentisterie de restauration, de prosthodontie et de science des matériaux, Université Bonn, Bonn, Allemagne
- Département de médecine dentaire reconstructive et gérodontologie, Université Berne, Berne, Suisse
| | - Dominik Kraus
- Département de dentisterie de restauration, de prosthodontie et de science des matériaux, Université Bonn, Bonn, Allemagne
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Lobastova L, Kraus D, Glassmann A, Khan D, Steinhäuser C, Wolff C, Veit N, Winter J, Probstmeier R. Collective cell migration of thyroid carcinoma cells: a beneficial ability to override unfavourable substrates. Cell Oncol (Dordr) 2016; 40:63-76. [PMID: 27826898 DOI: 10.1007/s13402-016-0305-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2016] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Tumor cell invasion and metastasis are life threatening events. Invasive tumor cells tend to migrate as collective sheets. In the present in vitro study we aimed to (i) assess whether collective tumor cells gain benefits in their migratory potential compared to single cells and (ii) to identify its putative underlying molecular mechanisms. METHODS The migratory potential of single and collective carcinoma cells was assessed using video time lapse microscopy and cell migration assays in the absence and presence of seven potential gap junction inhibitors or the Rac1 inhibitor Z62954982. The perturbation of gap junctions was assessed using a dye diffusion assay. In addition, LDH-based cytotoxicity and RT-PCR-based expression analyses were performed. RESULTS Whereas single breast, cervix and thyroid carcinoma cells were virtually immobile on unfavourable plastic surfaces, we found that they gained pronounced migratory capacities as collectives under comparable conditions. Thyroid carcinoma cells, that were studied in more detail, were found to express specific subsets of connexins and to form active gap junctions as revealed by dye diffusion analysis. Although all potential gap junction blockers suppressed intercellular dye diffusion in at least one of the cell lines tested, only two of them were found to inhibit collective cell migration and none of them to inhibit single cell migration. In the presence of the Rac1 inhibitor Z62954982 collective migration, but not single cell migration, was found to be reduced up to 20 %. CONCLUSIONS Our data indicate that collective migration enables tumor cells to cross otherwise unfavourable substrate areas. This capacity seems to be independent of intercellular communication via gap junctions, whereas Rac1-dependent intracellular signalling seems to be essential.
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Affiliation(s)
- Liudmila Lobastova
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, Sigmund-Freud-Str. 25, D-53105, Bonn, Germany
| | - Dominik Kraus
- Department of Prosthodontics, Preclinical Education, and Material Science, University of Bonn, Bonn, Germany
| | | | - Dilaware Khan
- Institute of Cellular Neurosciences, Medical Faculty, University of Bonn, Bonn, Germany
| | - Christian Steinhäuser
- Institute of Cellular Neurosciences, Medical Faculty, University of Bonn, Bonn, Germany
| | - Christina Wolff
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, Sigmund-Freud-Str. 25, D-53105, Bonn, Germany
| | - Nadine Veit
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, Sigmund-Freud-Str. 25, D-53105, Bonn, Germany
| | - Jochen Winter
- Oral Cell Biology Group, Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Rainer Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, Sigmund-Freud-Str. 25, D-53105, Bonn, Germany.
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Saunders AM, Jenei A, Döppner T, Falcone RW, Kraus D, Kritcher A, Landen OL, Nilsen J, Swift D. X-ray Thomson scattering measurements from hohlraum-driven spheres on the OMEGA laser. Rev Sci Instrum 2016; 87:11E724. [PMID: 27910609 DOI: 10.1063/1.4962044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
X-ray Thomson scattering (XRTS) is a powerful diagnostic for probing warm and hot dense matter. We present the design and results of the first XRTS experiments with hohlraum-driven CH2 targets on the OMEGA laser facility at the Laboratory for Laser Energetics in Rochester, NY. X-rays seen directly from the XRTS x-ray source overshadow the elastic scattering signal from the target capsule but can be controlled in future experiments. From the inelastic scattering signal, an average plasma temperature is inferred that is in reasonable agreement with the temperatures predicted by simulations. Knowledge gained in this experiment shows a promising future for further XRTS measurements on indirectly driven OMEGA targets.
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Affiliation(s)
- A M Saunders
- University of California Berkeley, Berkeley, California 94720, USA
| | - A Jenei
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - R W Falcone
- University of California Berkeley, Berkeley, California 94720, USA
| | - D Kraus
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - A Kritcher
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - J Nilsen
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - D Swift
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
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58
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MacDonald MJ, Gorkhover T, Bachmann B, Bucher M, Carron S, Coffee RN, Drake RP, Ferguson KR, Fletcher LB, Gamboa EJ, Glenzer SH, Göde S, Hau-Riege SP, Kraus D, Krzywinski J, Levitan AL, Meiwes-Broer KH, O'Grady CP, Osipov T, Pardini T, Peltz C, Skruszewicz S, Swiggers M, Bostedt C, Fennel T, Döppner T. Measurement of high-dynamic range x-ray Thomson scattering spectra for the characterization of nano-plasmas at LCLS. Rev Sci Instrum 2016; 87:11E709. [PMID: 27910491 DOI: 10.1063/1.4960502] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Atomic clusters can serve as ideal model systems for exploring ultrafast (∼100 fs) laser-driven ionization dynamics of dense matter on the nanometer scale. Resonant absorption of optical laser pulses enables heating to temperatures on the order of 1 keV at near solid density conditions. To date, direct probing of transient states of such nano-plasmas was limited to coherent x-ray imaging. Here we present the first measurement of spectrally resolved incoherent x-ray scattering from clusters, enabling measurements of transient temperature, densities, and ionization. Single shot x-ray Thomson scattering signals were recorded at 120 Hz using a crystal spectrometer in combination with a single-photon counting and energy-dispersive pnCCD. A precise pump laser collimation scheme enabled recording near background-free scattering spectra from Ar clusters with an unprecedented dynamic range of more than 3 orders of magnitude. Such measurements are important for understanding collective effects in laser-matter interactions on femtosecond time scales, opening new routes for the development of schemes for their ultrafast control.
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Affiliation(s)
- M J MacDonald
- University of Michigan, Ann Arbor, Michigan 48109, USA
| | - T Gorkhover
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - M Bucher
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S Carron
- California Lutheran University, Thousand Oaks, California 91360, USA
| | - R N Coffee
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - R P Drake
- University of Michigan, Ann Arbor, Michigan 48109, USA
| | - K R Ferguson
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - L B Fletcher
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E J Gamboa
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S Göde
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S P Hau-Riege
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - D Kraus
- University of California, Berkeley, California 94720, USA
| | - J Krzywinski
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A L Levitan
- Franklin W. Olin College of Engineering, Needham, Massachusetts 02492, USA
| | | | - C P O'Grady
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - T Osipov
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - T Pardini
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - C Peltz
- Universität Rostock, D-18051 Rostock, Germany
| | | | - M Swiggers
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C Bostedt
- Argonne National Lab, Lemont, Illinois 60439, USA
| | - T Fennel
- Universität Rostock, D-18051 Rostock, Germany
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
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Döppner T, Kraus D, Neumayer P, Bachmann B, Emig J, Falcone RW, Fletcher LB, Hardy M, Kalantar DH, Kritcher AL, Landen OL, Ma T, Saunders AM, Wood RD. Improving a high-efficiency, gated spectrometer for x-ray Thomson scattering experiments at the National Ignition Facility. Rev Sci Instrum 2016; 87:11E515. [PMID: 27910303 DOI: 10.1063/1.4959874] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We are developing x-ray Thomson scattering for applications in implosion experiments at the National Ignition Facility. In particular we have designed and fielded MACS, a high-efficiency, gated x-ray spectrometer at 7.5-10 keV [T. Döppner et al., Rev. Sci. Instrum. 85, 11D617 (2014)]. Here we report on two new Bragg crystals based on Highly Oriented Pyrolytic Graphite (HOPG), a flat crystal and a dual-section cylindrically curved crystal. We have performed in situ calibration measurements using a brass foil target, and we used the flat HOPG crystal to measure Mo K-shell emission at 18 keV in 2nd order diffraction. Such high photon energy line emission will be required to penetrate and probe ultra-high-density plasmas or plasmas of mid-Z elements.
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Affiliation(s)
- T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - D Kraus
- University of California, Berkeley, California 94720, USA
| | - P Neumayer
- Gesellschaft für Schwerionenphysik, Darmstadt, Germany
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - J Emig
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - R W Falcone
- University of California, Berkeley, California 94720, USA
| | - L B Fletcher
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - M Hardy
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - D H Kalantar
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
| | - A M Saunders
- University of California, Berkeley, California 94720, USA
| | - R D Wood
- Lawrence Livermore National Laboratory, Livermore, California 94720, USA
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Fletcher LB, Zastrau U, Galtier E, Gamboa EJ, Goede S, Schumaker W, Ravasio A, Gauthier M, MacDonald MJ, Chen Z, Granados E, Lee HJ, Fry A, Kim JB, Roedel C, Mishra R, Pelka A, Kraus D, Barbrel B, Döppner T, Glenzer SH. High resolution x-ray Thomson scattering measurements from cryogenic hydrogen jets using the linac coherent light source. Rev Sci Instrum 2016; 87:11E524. [PMID: 27910564 DOI: 10.1063/1.4959792] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present the first spectrally resolved measurements of x-rays scattered from cryogenic hydrogen jets in the single photon counting limit. The 120 Hz capabilities of the LCLS, together with a novel hydrogen jet design [J. B. Kim et al., Rev. Sci. Instrum. (these proceedings)], allow for the ability to record a near background free spectrum. Such high-dynamic-range x-ray scattering measurements enable a platform to study ultra-fast, laser-driven, heating dynamics of hydrogen plasmas. This measurement has been achieved using two highly annealed pyrolytic graphite crystal spectrometers to spectrally resolve 5.5 keV x-rays elastically and inelastically scattered from cryogenic hydrogen and focused on Cornell-SLAC pixel array detectors [S. Herrmann et al., Nucl. Instrum. Methods Phys. Res., Sect. A 718, 550 (2013)].
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Affiliation(s)
- L B Fletcher
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - E Galtier
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E J Gamboa
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S Goede
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - W Schumaker
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Ravasio
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Gauthier
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M J MacDonald
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Z Chen
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E Granados
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - H J Lee
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Fry
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - J B Kim
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C Roedel
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - R Mishra
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Pelka
- Helmholtz Zentrum Dresden-Rossendorf, Dresden, Germany
| | - D Kraus
- Helmholtz Zentrum Dresden-Rossendorf, Dresden, Germany
| | - B Barbrel
- Department of Physics, University of California Berkeley, Berkeley, California 94720, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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Greco G, Kraus D, Arosio P, Di Stefano D. Utilizzo di un micromotore implantare per la misura della densità ossea e della stabilità primaria in riabilitazione implantoprotesica: caso clinico. Dental Cadmos 2016. [DOI: 10.19256/d.cadmos.08.2016.12] [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: 11/20/2022]
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Kraus D. Spontane intercostale Thoraxwandhernien. Zentralbl Chir 2016. [DOI: 10.1055/s-0036-1587556] [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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Boehm KJ, Hash N, Barker D, Döppner T, Farrell MP, Fitzsimmons P, Kaczala D, Kraus D, Maranville B, Mauldin M, Neumayer P, Segraves K. Design and Engineering of a Target for X-Ray Thomson Scattering Measurements on Matter at Extreme Densities and Gigabar Pressures. Fusion Science and Technology 2016. [DOI: 10.13182/fst15-242] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K.-J. Boehm
- General Atomics, P.O. Box 85608, San Diego, California 92186
| | - N. Hash
- General Atomics, P.O. Box 85608, San Diego, California 92186
| | - D. Barker
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550
| | - T. Döppner
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550
| | - M. P. Farrell
- General Atomics, P.O. Box 85608, San Diego, California 92186
| | - P. Fitzsimmons
- General Atomics, P.O. Box 85608, San Diego, California 92186
| | - D. Kaczala
- General Atomics, P.O. Box 85608, San Diego, California 92186
| | - D. Kraus
- University of California, Department of Physics, Berkeley, California 94720
| | - B. Maranville
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550
| | - M. Mauldin
- General Atomics, P.O. Box 85608, San Diego, California 92186
| | - P. Neumayer
- GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany
| | - K. Segraves
- Schafer Corporation, 303 Lindbergh Avenue, Livermore, California 94551
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Hoppe T, Kraus D, Novak N, Probstmeier R, Frentzen M, Wenghoefer M, Jepsen S, Winter J. Oral pathogens change proliferation properties of oral tumor cells by affecting gene expression of human defensins. Tumour Biol 2016; 37:13789-13798. [PMID: 27481514 DOI: 10.1007/s13277-016-5281-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/15/2016] [Indexed: 02/08/2023] Open
Abstract
The impact of oral pathogens onto the generation and variability of oral tumors has only recently been investigated. To get further insights, oral cancer cells were treated with pathogens and additionally, as a result of this bacterial cellular infection, with human defensins, which are as anti-microbial peptide members of the innate immune system. After cell stimulation, proliferation behavior, expression analysis of oncogenic relevant defensin genes, and effects on EGFR signaling were investigated. The expression of oncogenic relevant anti-microbial peptides was analyzed with real-time PCR and immunohistochemistry. Cell culture experiments were performed to examine cellular impacts caused by stimulation, i.e., altered gene expression, proliferation rate, and EGF receptor-dependent signaling. Incubation of oral tumor cells with an oral pathogen (Porphyromonas gingivalis) and human α-defensins led to an increase in cell proliferation. In contrast, another oral bacterium used, Aggregatibacter actinomycetemcomitans, enhanced cell death. The bacteria and anti-microbial peptides exhibited diverse effects on the transcript levels of oncogenic relevant defensin genes and epidermal growth factor receptor signaling. These two oral pathogens exhibited opposite primary effects on the proliferation behavior of oral tumor cells. Nevertheless, both microbe species led to similar secondary impacts on the proliferation rate by modifying expression levels of oncogenic relevant α-defensin genes. In this respect, oral pathogens exerted multiplying effects on tumor cell proliferation. Additionally, human defensins were shown to differently influence epidermal growth factor receptor signaling, supporting the hypothesis that these anti-microbial peptides serve as ligands of EGFR, thus modifying the proliferation behavior of oral tumor cells.
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Affiliation(s)
- T Hoppe
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - D Kraus
- Department of Prosthodontics, Preclinical Education, and Material Science, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - N Novak
- Department of Dermatology and Allergy, University Hospital Bonn, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - R Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - M Frentzen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - M Wenghoefer
- Department of Oral and Maxillofacial Plastic Surgery, University Hospital Bonn, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - S Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - J Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
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Kraus D, Chapman DA, Kritcher AL, Baggott RA, Bachmann B, Collins GW, Glenzer SH, Hawreliak JA, Kalantar DH, Landen OL, Ma T, Le Pape S, Nilsen J, Swift DC, Neumayer P, Falcone RW, Gericke DO, Döppner T. X-ray scattering measurements on imploding CH spheres at the National Ignition Facility. Phys Rev E 2016; 94:011202. [PMID: 27575070 DOI: 10.1103/physreve.94.011202] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Indexed: 06/06/2023]
Abstract
We have performed spectrally resolved x-ray scattering measurements on highly compressed polystyrene at pressures of several tens of TPa (100 Mbar) created by spherically convergent shocks at the National Ignition Facility. Scattering data of line radiation at 9.0 keV were recorded from the dense plasma shortly after shock coalescence. Accounting for spatial gradients, opacity effects, and source broadening, we demonstrate the sensitivity of the elastic scattering component to carbon K-shell ionization while at the same time constraining the temperature of the dense plasma. For six times compressed polystyrene, we find an average temperature of 86 eV and carbon ionization state of 4.9, indicating that widely used ionization models need revision in order to be suitable for the extreme states of matter tested in our experiment.
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Affiliation(s)
- D Kraus
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - D A Chapman
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
- Plasma Physics Group, Radiation Physics Department, AWE plc, Reading RG7 4PR, United Kingdom
| | - A L Kritcher
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R A Baggott
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G W Collins
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - J A Hawreliak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Institute for Shock Physics, Washington State University, Pullman, Washington 99164, USA
| | - D H Kalantar
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Le Pape
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Nilsen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D C Swift
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Neumayer
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - R W Falcone
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - D O Gericke
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Gölz L, Simonis RA, Reichelt J, Stark H, Frentzen M, Allam JP, Probstmeier R, Winter J, Kraus D. In vitro biocompatibility of ICON(®) and TEGDMA on human dental pulp stem cells. Dent Mater 2016; 32:1052-64. [PMID: 27323651 DOI: 10.1016/j.dental.2016.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 04/30/2016] [Accepted: 06/03/2016] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Resin infiltrants have been successfully used in dental medicine preventing the progression of tooth decay in an early phase of caries development. ICON(®) is an infiltrant of low-viscosity which penetrates via dentinal tubules into the lesion in dependence of the demineralization depth. Hence, we performed an in vitro study to determine the effect of ICON(®) on human dental pulp stem cells (hDPSCs). METHODS Using explant technique, primary hDPSCs were collected from extracted teeth. Characterization and isolation were performed with typical mesenchymal stem cell markers (Stro-1, CD73, CD90, CD105) and hDPSCs differentiation was validated by immunofluorescence and flow cytometry. HDPSCs were stimulated with light-cured ICON(®) (lc) and non-light-cured ICON(®) (nc) conditioned media as well as different TEGDMA concentrations followed by the analysis of cytotoxicity, pro- and anti-inflammatory responses and differentiation using XTT assay, RT-PCR and ELISAs, respectively. RESULTS Initial analysis demonstrated that hDPSCs express characteristic mesenchymal stem cell markers and differentiate into adipocytes, chondrocytes and osteoblasts. Notably, ICON(®) nc dramatically reduced cell viability (up to 98.9% after 48h), whereas ICON(®) lc showed only a modest cytotoxicity (10%). Data were in line with cytokine expression demonstrating increased levels of IL-6 and IL-8 as well as decreased IL-10 after ICON(®) nc exposure compared to ICON(®) lc. ICON(®) lc caused almost no alterations of DSPP, whereas ICON(®) nc markedly elevated DSPP mRNA levels (130.3-times). A concentration-dependent effect was observed in TEGDMA challenged hDPSCs. SIGNIFICANCE ICON(®) is a successful minimal invasive technique. However, clinicians should strictly follow manufacturer's instructions to prevent adverse effects.
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Affiliation(s)
- Lina Gölz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Ruth Andrea Simonis
- Department of Prosthodontics, Preclinical Education and Material Sciences, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Joana Reichelt
- Department of Prosthodontics, Preclinical Education and Material Sciences, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Helmut Stark
- Department of Prosthodontics, Preclinical Education and Material Sciences, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Matthias Frentzen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Jean-Pierre Allam
- Department of Dermatology and Allergy, University of Bonn, Bonn, Germany
| | - Rainer Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital Bonn, Bonn, Germany
| | - Jochen Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Dominik Kraus
- Department of Prosthodontics, Preclinical Education and Material Sciences, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany.
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Reckenbeil J, Kraus D, Probstmeier R, Allam JP, Novak N, Frentzen M, Martini M, Wenghoefer M, Winter J. Cellular Distribution and Gene Expression Pattern of Metastasin (S100A4), Calgranulin A (S100A8), and Calgranulin B (S100A9) in Oral Lesions as Markers for Molecular Pathology. Cancer Invest 2016; 34:246-54. [PMID: 27294692 DOI: 10.1080/07357907.2016.1186172] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The objective of this study was to analyze cellular localization and expression levels of oncologic relevant members of the S100 family in common oral lesions.Biopsies of various oral lesions were analyzed. S100A4 showed a higher expression rate in leukoplakias and oral squamous cell carcinomas. Transcript levels of S100A8 and S100A9 were significantly decreased in malignant OSCCs. A correlation could be drawn between the expression levels of these genes and the pathological characteristics of the investigated lesions. S100A4, A8, and A9 proteins represent promising marker genes to evaluate the risk potential of suspicious oral lesions in molecular pathology.
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Affiliation(s)
- Jan Reckenbeil
- a Department of Periodontology, Operative and Preventive Dentistry , University of Bonn , Bonn , Germany
| | - Dominik Kraus
- b Department of Prosthodontics, Preclinical Education, and Material Science , University of Bonn , Bonn , Germany
| | - Rainer Probstmeier
- c Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine , University of Bonn , Bonn , Germany
| | - Jean-Pierre Allam
- d Department of Dermatology and Allergy , University of Bonn , Bonn , Germany
| | - Natalija Novak
- d Department of Dermatology and Allergy , University of Bonn , Bonn , Germany
| | - Matthias Frentzen
- a Department of Periodontology, Operative and Preventive Dentistry , University of Bonn , Bonn , Germany
| | - Markus Martini
- e Department of Oral & Maxillofacial Plastic Surgery , University of Bonn , Bonn , Germany
| | - Matthias Wenghoefer
- e Department of Oral & Maxillofacial Plastic Surgery , University of Bonn , Bonn , Germany
| | - Jochen Winter
- a Department of Periodontology, Operative and Preventive Dentistry , University of Bonn , Bonn , Germany
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Reichelt J, Winter J, Meister J, Frentzen M, Kraus D. A novel blue light laser system for surgical applications in dentistry: evaluation of specific laser-tissue interactions in monolayer cultures. Clin Oral Investig 2016; 21:985-994. [DOI: 10.1007/s00784-016-1864-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 05/24/2016] [Indexed: 12/31/2022]
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Kraus D, Reckenbeil J, Perner S, Winter J, Probstmeier R. Expression Pattern of Matrix Metalloproteinase 20 (MMP20) in Human Tumors. Anticancer Res 2016; 36:2713-2718. [PMID: 27272780] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 04/26/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND/AIM Matrix metalloproteinase 20 (MMP20) is a member of the family of matrix metalloproteinases. Under normal conditions the expression of MMP20 is restricted to ameloblasts and odontoblasts. In order to identify a possible expression of MMP20 under pathological conditions, we investigated three major human tumor entities, i.e. colon, breast and lung tumors, on the mRNA and protein level. MATERIALS AND METHODS Real-time RT-PCR and immunocytochemical analyses of established human tumor cell lines were employed for our study; immunohistochemical analysis was performed on both primary tumors and normal control tissues. RESULTS MMP20 was identified on both the mRNA and the protein level in breast MCF-7, colon HT-29, and lung A549 cell lines. MMP20 was also detected in primary tumor tissue by immunohistochemistry. CONCLUSION MMP20 is a new potential candidate for tumor diagnosis or therapy.
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Affiliation(s)
- Dominik Kraus
- Department of Prosthodontics, Preclinical Education and Material Science, University of Bonn, Bonn, Germany
| | - Jan Reckenbeil
- Department of Prosthodontics, Preclinical Education and Material Science, University of Bonn, Bonn, Germany
| | - Sven Perner
- Pathology of the University Hospital of Luebeck and the Leibuiz Research Center Borstel, Luebeck and Borstel, Germany
| | - Jochen Winter
- Oral Cell Biology Group, Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Rainer Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital of Bonn, Bonn, Germany
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Kraus D, Döppner T, Kritcher AL, Yi A, Boehm K, Bachmann B, Divol L, Fletcher LB, Glenzer SH, Landen OL, Masters N, Saunders AM, Weber C, Falcone RW, Neumayer P. Platform for spectrally resolved x-ray scattering from imploding capsules at the National Ignition Facility. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/717/1/012067] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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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Gölz L, Vestewig E, Blankart M, Kraus D, Appel T, Frede S, Jäger A. Differences in human gingival and dermal fibroblasts may contribute to oral-induced tolerance against nickel. J Allergy Clin Immunol 2016; 138:1202-1205.e3. [PMID: 27264456 DOI: 10.1016/j.jaci.2016.03.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 03/04/2016] [Accepted: 03/22/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Lina Gölz
- Department of Orthodontics, Dental Clinic, University Hospital of Bonn, Bonn, Germany.
| | - Elisa Vestewig
- Department of Orthodontics, Dental Clinic, University Hospital of Bonn, Bonn, Germany; Clinic of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - Moritz Blankart
- Department of Orthodontics, Dental Clinic, University Hospital of Bonn, Bonn, Germany
| | - Dominik Kraus
- Department of Prosthodontics, University of Bonn, Bonn, Germany
| | - Thorsten Appel
- Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Stilla Frede
- Clinic of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - Andreas Jäger
- Department of Orthodontics, Dental Clinic, University Hospital of Bonn, Bonn, Germany
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Zapp B, Kraus NA, Rudolphi B, Kraus BJ, Sauer A, Klein J, Wanner C, Kraus D. Nicotinamide N-methyltransferase (NNMT) regulates insulin sensitivity differentially in white and brown adipocytes. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580809] [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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Rudolphi B, Sauer A, Zapp B, Kraus NA, Wanner C, Kraus D. Tissue distribution of nicotinamide N-methyltransferase activity in lean and in diet-induced obese mice. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580822] [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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Kraus NA, Rudolphi B, Zapp B, Wanner C, Kraus D. Valid assessment of lipid content of cultured adipocytes using oil red O. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580975] [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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Zapp B, Rudolphi B, Kraus NA, Klein J, Wanner C, Kraus D. Pharmacological inhibition of nicotinamide N-methyltransferase (NNMT) in adipocytes by romidepsin. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580818] [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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Kritcher AL, Doeppner T, Swift D, Hawreliak J, Nilsen J, Hammer J, Bachmann B, Collins G, Landen O, Keane C, Glenzer S, Rothman S, Chapman D, Kraus D, Falcone R. Shock Hugoniot measurements of CH at Gbar pressures at the NIF. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/688/1/012055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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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Winter J, Kraus D, Reckenbeil J, Probstmeier R. Oncogenic relevant defensins: expression pattern and proliferation characteristics of human tumor cell lines. Tumour Biol 2015; 37:7959-66. [PMID: 26711780 DOI: 10.1007/s13277-015-4701-7] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/17/2015] [Indexed: 12/20/2022] Open
Abstract
The objective of this study was to investigate gene expression levels of oncogenic relevant human defensins and their impact on proliferation rates of 29 cell lines derived from main types of different tumor origins. Differential gene expression analysis of human defensins was performed by real-time PCR experiments. The proliferation rate of tumor cells that had been cultivated in the absence or presence of biologically active peptides was analyzed with a lactate dehydrogenase assay kit. At least one member of the defensin family was expressed in each tumor cell line, whereby α-defensin (DEFA1), DEFA2, or DEFA3 transcripts could be ubiquitously detected. Cell lines of neural origin (glioma, neuroblastoma, and small-cell lung carcinoma) expressed far less human β-defensins (hBDs) in comparison to other tumor types. The expression level of a specific defensin in various cell lines could vary by more than five orders of magnitude. Compensatory mechanisms on the expression levels of the different defensins could not be strictly observed. Only in 3 out of 29 tumor cell lines the proliferation rate was affected after defensin stimulation. The variable appearance of defensins, as well as the cell line-restricted functional activity, argues for the integration of defensins in complex cellular and molecular networks that tolerate rather flexible expression patterns.
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Affiliation(s)
- Jochen Winter
- Oral Cell Biology Group, Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
| | - Dominik Kraus
- Department of Prosthodontics, Preclinical Education, and Material Science, University of Bonn, 53111, Bonn, Germany
| | - Jan Reckenbeil
- Department of Prosthodontics, Preclinical Education, and Material Science, University of Bonn, 53111, Bonn, Germany
| | - Rainer Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University of Bonn, 53105, Bonn, Germany
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Kraus D, Boyle V, Leibig N, Stark GB, Penna V. The Neuro-spheroid—A novel 3D in vitro model for peripheral nerve regeneration. J Neurosci Methods 2015; 246:97-105. [DOI: 10.1016/j.jneumeth.2015.03.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 01/27/2015] [Accepted: 03/03/2015] [Indexed: 12/17/2022]
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Gallala H, Winter J, Veit N, Nowak M, Perner S, Courts C, Kraus D, Janzen V, Probstmeier R. Staurosporine analogs promote distinct patterns of process outgrowth and polyploidy in small cell lung carcinoma cells. Tumour Biol 2014; 36:2725-35. [PMID: 25487614 DOI: 10.1007/s13277-014-2897-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 11/26/2014] [Indexed: 12/26/2022] Open
Abstract
We have recently shown that staurosporine mediates the conversion of small cell lung carcinoma (SCLC) cells into a neuron-like process-bearing phenotype. Here, we have extended these studies to the staurosporine analogs K252a, lestaurtinib, PKC412, stauprimide, and UCN-01 and analyzed their influence on process extension, cell cycle distribution, and induction of polyploidy in four SCLC cell lines. In GLC-2 cells, all compounds provoked extensive process formation with the exception of PKC412 that showed no response. In H1184 cells, process formation was predominantly induced by staurosporine and, to lesser extent, in lestaurtinib-, stauprimide-, and UCN-01-treated cells. In the presence of K252a or PKC412, cells became bipolar and spindle shaped or showed pronounced cell flattening. In GLC-36 and SCLC-24H cells, only cell flattening was detectable. Process formation was reversible upon drug removal as shown for GLC-2 and H1184 cells. Fluorescence-activated cell sorting (FACS) and fluorescence in situ hybridization (FISH) analysis indicated the induction of polyploidy in all staurosporine and in two out of four stauprimide-treated SCLC cell lines. For other staurosporine analogs, polyploidy was observed only in UCN-01-treated GLC-36 cells and in K252a-treated H1184 and GLC-36 cells. The presence of staurosporine or its analogs did not alter the constitutive activation pattern of the canonical Akt/PI3K or MEK/extracellular signal-regulated kinase (ERK)1/2 signaling pathways nor could we detect an influence of stauprimide application on the expression level of the c-Myc oncogene. These data demonstrate that in SCLC cells, albeit a higher substrate specificity, staurosporine analogs can induce staurosporine-comparable effects.
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Affiliation(s)
- Hichem Gallala
- Department of Hematology/Oncology, University of Bonn, Bonn, Germany
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Bachmann B, Kritcher AL, Benedetti LR, Falcone RW, Glenn S, Hawreliak J, Izumi N, Kraus D, Landen OL, Le Pape S, Ma T, Pérez F, Swift D, Döppner T. Using penumbral imaging to measure micrometer size plasma hot spots in Gbar equation of state experiments on the National Ignition Facility. Rev Sci Instrum 2014; 85:11D614. [PMID: 25430190 DOI: 10.1063/1.4891303] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have developed an experimental platform for absolute equation of state measurements up to Gbar pressures on the National Ignition Facility (NIF) within the Fundamental Science Program. We use a symmetry-tuned hohlraum drive to launch a spherical shock wave into a solid CH sphere. Streaked radiography is the primary diagnostic to measure the density change at the shock front as the pressure increases towards smaller radii. At shock stagnation in the center of the capsule, we observe a short and bright x-ray self emission from high density (∼50 g/cm(3)) plasma at ∼1 keV. Here, we present results obtained with penumbral imaging which has been carried out to characterize the size of the hot spot emission. This allows extending existing NIF diagnostic capabilities for spatial resolution (currently ∼10 μm) at higher sensitivity. At peak emission we find the hot spot radius to be as small as 5.8 +/- 1 μm, corresponding to a convergence ratio of 200.
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Affiliation(s)
- B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L R Benedetti
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R W Falcone
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - S Glenn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Hawreliak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Kraus
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Le Pape
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Pérez
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Swift
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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81
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Gauthier M, Fletcher LB, Ravasio A, Galtier E, Gamboa EJ, Granados E, Hastings JB, Heimann P, Lee HJ, Nagler B, Schropp A, Gleason A, Döppner T, LePape S, Ma T, Pak A, MacDonald MJ, Ali S, Barbrel B, Falcone R, Kraus D, Chen Z, Mo M, Wei M, Glenzer SH. New experimental platform to study high density laser-compressed matter. Rev Sci Instrum 2014; 85:11E616. [PMID: 25430362 DOI: 10.1063/1.4896175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have developed a new experimental platform at the Linac Coherent Light Source (LCLS) which combines simultaneous angularly and spectrally resolved x-ray scattering measurements. This technique offers a new insights on the structural and thermodynamic properties of warm dense matter. The < 50 fs temporal duration of the x-ray pulse provides near instantaneous snapshots of the dynamics of the compression. We present a proof of principle experiment for this platform to characterize a shock-compressed plastic foil. We observe the disappearance of the plastic semi-crystal structure and the formation of a compressed liquid ion-ion correlation peak. The plasma parameters of shock-compressed plastic can be measured as well, but requires an averaging over a few tens of shots.
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Affiliation(s)
- M Gauthier
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - L B Fletcher
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Ravasio
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E Galtier
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E J Gamboa
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E Granados
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - J B Hastings
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - P Heimann
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - H J Lee
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - B Nagler
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Schropp
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Gleason
- Department of Geological and Environmental Sciences, Stanford University, Menlo Park, California 94025, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - S LePape
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - T Ma
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - A Pak
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - M J MacDonald
- Atmospheric, Oceanic, and Space Science Department, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - S Ali
- Physics Department, University of California Berkeley, Berkeley, California 94709, USA
| | - B Barbrel
- Physics Department, University of California Berkeley, Berkeley, California 94709, USA
| | - R Falcone
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - D Kraus
- Physics Department, University of California Berkeley, Berkeley, California 94709, USA
| | - Z Chen
- Physics Department, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - M Mo
- Physics Department, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - M Wei
- Inertial fusion technology Department, General Atomics, San Diego, California 85608, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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82
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Döppner T, Kritcher AL, Neumayer P, Kraus D, Bachmann B, Burns S, Falcone RW, Glenzer SH, Hawreliak J, House A, Landen OL, LePape S, Ma T, Pak A, Swift D. Qualification of a high-efficiency, gated spectrometer for x-ray Thomson scattering on the National Ignition Facility. Rev Sci Instrum 2014; 85:11D617. [PMID: 25430193 DOI: 10.1063/1.4890253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have designed, built, and successfully fielded a highly efficient and gated Bragg crystal spectrometer for x-ray Thomson scattering measurements on the National Ignition Facility (NIF). It utilizes a cylindrically curved Highly Oriented Pyrolytic Graphite crystal. Its spectral range of 7.4-10 keV is optimized for scattering experiments using a Zn He-α x-ray probe at 9.0 keV or Mo K-shell line emission around 18 keV in second diffraction order. The spectrometer has been designed as a diagnostic instrument manipulator-based instrument for the NIF target chamber at the Lawrence Livermore National Laboratory, USA. Here, we report on details of the spectrometer snout, its novel debris shield configuration and an in situ spectral calibration experiment with a Brass foil target, which demonstrated a spectral resolution of E/ΔE = 220 at 9.8 keV.
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Affiliation(s)
- T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Neumayer
- Gesellschaft für Schwerionenphysik, 64291 Darmstadt, Germany
| | - D Kraus
- University of California, Berkeley, California 94720, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Burns
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R W Falcone
- University of California, Berkeley, California 94720, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - J Hawreliak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A House
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S LePape
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Pak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Swift
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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83
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Kraus D, Döppner T, Kritcher AL, Bachmann B, Chapman DA, Collins GW, Glenzer SH, Hawreliak JA, Landen OL, Ma T, Le Pape S, Neumayer P, Swift DC, Falcone RW. X-ray continuum emission spectroscopy from hot dense matter at Gbar pressures. Rev Sci Instrum 2014; 85:11D606. [PMID: 25430182 DOI: 10.1063/1.4890263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have measured the time-resolved x-ray continuum emission spectrum of ∼30 times compressed polystyrene created at stagnation of spherically convergent shock waves within the Gbar fundamental science campaign at the National Ignition Facility. From an exponential emission slope between 7.7 keV and 8.1 keV photon energy and using an emission model which accounts for reabsorption, we infer an average electron temperature of 375 ± 21 eV, which is in good agreement with HYDRA-1D simulations.
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Affiliation(s)
- D Kraus
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D A Chapman
- Plasma Physics Group, Radiation Physics Department, AWE plc, Reading RG7 4PR, United Kingdom and Centre for Fusion, Space and Astrophysics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - G W Collins
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - J A Hawreliak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Le Pape
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Neumayer
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - D C Swift
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R W Falcone
- Department of Physics, University of California, Berkeley, California 94720, USA
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84
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Gölz L, Bayer S, Keilig L, Jäger A, Stark H, Bourauel C, Götz W, Frede S, Winter J, Kraus D. Possible implications of Ni(II) on oral IL-1β-induced inflammatory processes. Dent Mater 2014; 30:1325-35. [PMID: 25447842 DOI: 10.1016/j.dental.2014.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Revised: 05/15/2014] [Accepted: 09/23/2014] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Nickel (Ni) is one of the main metal elements in orthodontic and prosthetic devices. Different effects of Ni are described ranging from an induction of local inflammation to allergy and cancerous/mutagenic properties. Inflammatory reactions are frequently observed in the oral cavity, but the interrelationship of Ni with those events is still unknown. Therefore, we focused on the impact of Ni on inflammation in vitro. METHODS In accordance to previous immersion tests of our lab, human gingival fibroblasts (HGFs) (n=6) were exposed to a pro-inflammatory environment using interleukin-1 beta (IL-1β) and additionally stimulated with different Ni(II) concentrations (400 and 4000ng/ml). At varying time points the expression of pro- and anti-inflammatory as well as matrix degeneration proteins, i.e. MMPs, were analyzed. Furthermore, proliferation assays, wound healing tests and the detection of NF-κB activation were conducted. Unstimulated HGFs served as control. RESULTS Our experiments showed that low clinical average Ni(II) levels did not alter pro-inflammatory cytokines significantly compared to control (p>0.05). Instead, a 10-fold higher dose up-regulated these mediators significantly in a time-dependent manner (p<0.01). This was even more pronounced combining both Ni(II) concentrations with an inflammatory condition (p<0.001), MMP expressions were in line with our findings (p<0.001). The mRNA data were supported by proliferation and wound closure assays (p<0.001). However, the combination of both stimuli induced contradictory results. Analyzing NF-κB activation revealed that our results may be in part attributed to NF-κB. SIGNIFICANCE Our in vitro study implicated that Ni(II) has various modifying effects on IL-1β-induced inflammatory processes depending on the concentration.
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Affiliation(s)
- Lina Gölz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany.
| | - Stefan Bayer
- Department of Prosthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | | | - Andreas Jäger
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Helmut Stark
- Department of Prosthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | | | - Werner Götz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
| | - Stilla Frede
- Department of Anesthesiology and Intensive Care Medicine, University of Bonn, Bonn, Germany
| | - Jochen Winter
- Oral Cell Biology Group, Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Dominik Kraus
- Department of Prosthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany
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85
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Glassmann A, Winter J, Kraus D, Veit N, Probstmeier R. Pharmacological suppression of the Ras/MAPK pathway in thyroid carcinoma cells can provoke opposite effects on cell migration and proliferation: The appearance of yin-yang effects and the need of combinatorial treatments. Int J Oncol 2014; 45:2587-95. [PMID: 25269412 DOI: 10.3892/ijo.2014.2668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 08/01/2014] [Indexed: 11/06/2022] Open
Abstract
A major challenge in tumor therapy is the decrease or even the halting of cell proliferation and migration of cancerous cells. In the present study, we have analyzed the impact of a pharmacological blockade of the PI3K/Akt and MAPK/ERK1/2 signaling pathways on cell migration, proliferation and cell death in three human thyroid tumor cell lines that represent the main types of malignant thyroid carcinomas (B-CPAP, follicular; Cal-62, anaplastic; FTC-133, papillary thyroid carcinoma cells) and in which these pathways are constitutively activated. In general, pharmacological perturbation of PI3/Akt (application of MK-2206) and MEK/ERK1/2 (application of PD0325901 or U0126) signaling led to a cell line and drug-specific decrease in the proliferation and migration potential of thyroid carcinoma cells, although to a varying extent. However, one exception became apparent: in Cal-62 cells inhibition of the MEK/ERK1/2 module increased the migration rate up to 50%. This effect could be prevented by a simultaneous suppression of the PI3/Akt pathway, but also by application of the multiple kinase inhibitor sorafenib, a treatment that did not change the activation state of Akt. Thus, a pharmacological perturbation of canonical signaling pathways in thyroid carcinoma may induce drug-dependent yin-yang effects that are characterized by a simultaneous suppression of one (i.e., proliferation) and the activation of another (i.e., migration) cellular process. The appearance of such phenomena should be taken into account when therapy plans are established.
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Affiliation(s)
| | - Jochen Winter
- Oral Cell Biology Group, Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Dominik Kraus
- Department of Prosthodontics, Preclinical Education and Material Science, University of Bonn, Bonn, Germany
| | - Nadine Veit
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital of Bonn, Bonn, Germany
| | - Rainer Probstmeier
- Neuro- and Tumor Cell Biology Group, Department of Nuclear Medicine, University Hospital of Bonn, Bonn, Germany
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86
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Döppner T, Kritcher AL, Kraus D, Glenzer SH, Bachmann BL, Chapman D, Collins GW, Falcone RW, Hawreliak J, Landen OL, Lee HJ, Pape SL, Ma T, Neumayer P, Redmer R, Swift DC. X-ray Thomson scattering as a temperature probe for Gbar shock experiments. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/500/19/192019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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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87
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Kraus D, Yang Q, Kong D, Banks AS, Zhang L, Rodgers JT, Pirinen E, Pulinilkunnil TC, Gong F, Wang YC, Cen Y, Sauve AA, Asara JM, Peroni OD, Monia BP, Bhanot S, Alhonen L, Puigserver P, Kahn BB. Nicotinamide N-methyltransferase is a novel regulator of energy metabolism in adipose tissue. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1374908] [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: 10/25/2022]
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88
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Kraus D, Vorberger J, Gericke DO, Bagnoud V, Blažević A, Cayzac W, Frank A, Gregori G, Ortner A, Otten A, Roth F, Schaumann G, Schumacher D, Siegenthaler K, Wagner F, Wünsch K, Roth M. Probing the complex ion structure in liquid carbon at 100 GPa. Phys Rev Lett 2013; 111:255501. [PMID: 24483747 DOI: 10.1103/physrevlett.111.255501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 06/03/2023]
Abstract
We present the first direct experimental test of the complex ion structure in liquid carbon at pressures around 100 GPa, using spectrally resolved x-ray scattering from shock-compressed graphite samples. Our results confirm the structure predicted by ab initio quantum simulations and demonstrate the importance of chemical bonds at extreme conditions similar to those found in the interiors of giant planets. The evidence presented here thus provides a firmer ground for modeling the evolution and current structure of carbon-bearing icy giants like Neptune, Uranus, and a number of extrasolar planets.
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Affiliation(s)
- D Kraus
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - J Vorberger
- Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany
| | - D O Gericke
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - V Bagnoud
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - A Blažević
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - W Cayzac
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany and Université de Bordeaux-CEA-CNRS CELIA UMR 5107, 351 Cours de la Libération, 33405 Talence, France
| | - A Frank
- Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany
| | - G Gregori
- Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - A Ortner
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - A Otten
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - F Roth
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - G Schaumann
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - D Schumacher
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - K Siegenthaler
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - F Wagner
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - K Wünsch
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom and Tessella, 26 The Quadrant, Abingdon OX14 3YS, United Kingdom
| | - M Roth
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
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89
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Gyorki DE, Boyle JO, Ganly I, Morris L, Shaha AR, Singh B, Wong RJ, Shah JP, Busam K, Kraus D, Coit DG, Patel S. Incidence and location of positive nonsentinel lymph nodes in head and neck melanoma. Eur J Surg Oncol 2013; 40:305-10. [PMID: 24361245 DOI: 10.1016/j.ejso.2013.11.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 10/13/2013] [Revised: 11/12/2013] [Accepted: 11/18/2013] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The complex lymphatic drainage in the head and neck makes sentinel lymph node biopsy (SLNB) for melanomas in this region challenging. This study describes the incidence, and location of additional positive nonsentinel lymph nodes (NSLN) in patients with cutaneous head and neck melanoma following a positive SLNB. METHODS A retrospective review was performed using a single institution prospective database. Patients with a primary melanoma in the head or neck with a positive cervical SLNB were identified. The lymphadenectomy specimen was divided intraoperatively into lymph node levels I-V, and NSLN status determined for each level. RESULTS Of 387 patients with melanoma of the head and neck who underwent cervical SLNB, 54 had a positive SLN identified (14%). Thirty six patients (67%) underwent immediate completion lymph node dissection (CLND) of whom eight patients (22%) had a positive NSLN. The remaining 18 patients (33%) did not undergo CLND and were observed. Half of positive NSLNs (50%) were in the same lymph node level as the SLN and 33% were in an immediately adjacent level; only two patients were found to have NSLNs in non-adjacent levels. The only factor predictive of NSLN involvement was the size of the tumor deposit in the SLN>0.2 mm (p = 0.05). Superficial parotidectomy at CLND revealed metastatic melanoma only in patients with a positive parotid SLN. CONCLUSIONS A positive NLSN was identified in 22% of patients undergoing CLND after a positive SLNB. The majority of positive NSLNs are found within or immediately adjacent to the nodal level containing the SLN.
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Affiliation(s)
- D E Gyorki
- Peter MacCallum Cancer Centre, Melbourne, Australia
| | - J O Boyle
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - I Ganly
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - L Morris
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - A R Shaha
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - B Singh
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - R J Wong
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - J P Shah
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - K Busam
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - D Kraus
- New York Head & Neck Institute, North Shore-LIJ Cancer Institute, USA
| | - D G Coit
- Memorial Sloan-Kettering Cancer Center, New York, USA
| | - S Patel
- Memorial Sloan-Kettering Cancer Center, New York, USA.
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90
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Lazarus CL, Husaini H, Falciglia D, DeLacure M, Branski RC, Kraus D, Lee N, Ho M, Ganz C, Smith B, Sanfilippo N. Effects of exercise on swallowing and tongue strength in patients with oral and oropharyngeal cancer treated with primary radiotherapy with or without chemotherapy. Int J Oral Maxillofac Surg 2013; 43:523-30. [PMID: 24332586 DOI: 10.1016/j.ijom.2013.10.023] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 10/28/2013] [Accepted: 10/30/2013] [Indexed: 11/27/2022]
Abstract
Tongue strength is reduced in patients treated with chemoradiotherapy for oral/oropharyngeal cancer. Tongue strengthening protocols have resulted in improved lingual strength and swallowing in healthy individuals, as well as in patients following a neurological event. However, no studies have examined the efficacy of tongue strengthening exercises on tongue strength, swallowing, and quality of life (QOL; Head and Neck Cancer Inventory) in patients treated with chemoradiotherapy. A randomized clinical trial examined the effects of a tongue strengthening programme paired with traditional exercises vs. traditional exercises alone. Dependent variables included tongue strength, swallowing, and QOL in a group of patients with oral and oropharyngeal cancer treated with primary radiotherapy with or without chemotherapy. Differences with regard to tongue strength and oropharyngeal swallow efficiency (OPSE) were not observed within or between groups. QOL in the eating and speech domains improved following treatment in both groups. However, the experimental group demonstrated greater impairment in QOL in the social disruption domain following treatment, whereas the control group demonstrated a slight improvement in functioning. Tongue strengthening did not yield a statistically significant improvement in either tongue strength or swallowing measures in this patient cohort. Patient compliance and treatment timing may be factors underlying these outcomes.
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Affiliation(s)
- C L Lazarus
- Department of Otolaryngology - Head and Neck Surgery, Beth Israel Medical Center, New York, USA; Thyroid Head and Neck Cancer Foundation, Beth Israel Medical Center, New York, USA.
| | - H Husaini
- Thyroid Head and Neck Cancer Foundation, Beth Israel Medical Center, New York, USA
| | - D Falciglia
- Department of Otolaryngology - Head and Neck Surgery, New York University School of Medicine, New York, USA
| | - M DeLacure
- Department of Otolaryngology - Head and Neck Surgery, New York University School of Medicine, New York, USA
| | - R C Branski
- NYU Voice Center, Department of Otolaryngology - Head and Neck Surgery, New York University School of Medicine, New York, USA
| | - D Kraus
- Center for Head and Neck Oncology, New York Head and Neck Institute, North Shore LIJ Cancer Institute, New York, USA
| | - N Lee
- Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, USA
| | - M Ho
- Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, USA
| | - C Ganz
- Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, USA
| | - B Smith
- Department of Radiation Oncology, New York University School of Medicine, New York, USA
| | - N Sanfilippo
- Department of Radiation Oncology, New York University School of Medicine, New York, USA
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91
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Schweigert M, Solymosi N, Dubecz A, Kraus D, Stadlhuber R, Ofner D, Stein H. P-162EMERGENT PNEUMECTOMY FOR LUNG GANGRENE: DOES THE OUTCOME WARRANT THE PROCEDURE? Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt288.162] [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: 11/13/2022] Open
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Frank A, Blažević A, Bagnoud V, Basko MM, Börner M, Cayzac W, Kraus D, Hessling T, Hoffmann DHH, Ortner A, Otten A, Pelka A, Pepler D, Schumacher D, Tauschwitz A, Roth M. Energy loss and charge transfer of argon in a laser-generated carbon plasma. Phys Rev Lett 2013; 110:115001. [PMID: 25166546 DOI: 10.1103/physrevlett.110.115001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Indexed: 06/03/2023]
Abstract
This Letter reports on the measurement of the energy loss and the projectile charge states of argon ions at an energy of 4 MeV/u penetrating a fully ionized carbon plasma. The plasma of n(e)≈10(20) cm(-3) and T(e)≈180 eV is created by two laser beams at λ(Las)=532 nm incident from opposite sides on a thin carbon foil. The resulting plasma is spatially homogenous and allows us to record precise experimental data. The data show an increase of a factor of 2 in the stopping power which is in very good agreement with a specifically developed Monte Carlo code, that allows the calculation of the heavy ion beam's charge state distribution and its energy loss in the plasma.
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Affiliation(s)
- A Frank
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - A Blažević
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, Darmstadt D-64291, Germany
| | - V Bagnoud
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, Darmstadt D-64291, Germany
| | - M M Basko
- ITEP, B. Cheremushkinskaja 25, Moscow 117259, Russia
| | - M Börner
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - W Cayzac
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - D Kraus
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - T Hessling
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, Darmstadt D-64291, Germany
| | - D H H Hoffmann
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - A Ortner
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - A Otten
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - A Pelka
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - D Pepler
- STFC Rutherford Appleton Laboratory, Harwell Oxford OX11 0QX, United Kingdom
| | - D Schumacher
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
| | - An Tauschwitz
- Institut für Theoretische Physik, Universität Frankfurt, Max-von-Laue-Strasse 1, Frankfurt 60438, Germany
| | - M Roth
- Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, Darmstadt D-64289, Germany
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93
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Bayer S, Kraus D, Keilig L, Gölz L, Stark H, Enkling N. Wear of double crown systems: electroplated vs. casted female part. J Appl Oral Sci 2013; 20:384-91. [PMID: 22858708 PMCID: PMC3881770 DOI: 10.1590/s1678-77572012000300015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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: 10/29/2010] [Accepted: 08/11/2011] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES The wear of telescopic crowns is a common problem often reducing the patient's satisfaction with the denture and resulting in a renewal of the denture. The study aims to compare the wear behavior of conical crowns using electroplated copings (group E ) with standard telescopic crowns with cast female parts (group C). MATERIAL AND METHODS 10 conical crowns were milled for each group of a cast gold alloy. The specimen of group E had a conicity of 2º. The cast secondary crowns of group C had a 0º design. The electroplated coping was established by direct electroforming. An apparatus accomplishing 10,000 wear cycles performed the wear test. The retentive forces and the correlating distance during insertion and separation were measured. The wear test was separated in a start phase, an initial wear phase and the long term wear period. The retention force value and the force-distance integral of the first 0.33 mm of each cycle were calculated. RESULTS The retentive forces were significantly higher for group E and the integrals were significantly lower for this group except the integral at cycle 10,000. The changes of retention force and integral did not differ significantly between both groups in all phases. The change of the integrals as well as the integral at the particular cycles showed higher interquartile distances for group C. CONCLUSIONS Within the limitations of this study the tested conical crowns showed clinically acceptable retentive properties. The values reached a range comparable to retentive elements tested in recent literature. The values of group C showed higher ranges. The force measured for group E was significantly higher than for group C but the integrals showed an opposite tendency. The results indicate that an exclusive analysis of the force is not sufficient as the integral is not equivalent to the force although it describes the retentive property of the system in a better way than the force over a distance is described. Both systems seem to be suitable for clinical practice.
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Affiliation(s)
- Stefan Bayer
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Germany.
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94
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Bartlang MS, Neumann ID, Slattery DA, Uschold-Schmidt N, Kraus D, Helfrich-Förster C, Reber SO. Time matters: pathological effects of repeated psychosocial stress during the active, but not inactive, phase of male mice. J Endocrinol 2012; 215:425-37. [PMID: 23001029 DOI: 10.1530/joe-12-0267] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Recent findings in rats indicated that the physiological consequences of repeated restraint stress are dependent on the time of day of stressor exposure. To investigate whether this is also true for clinically more relevant psychosocial stressors and whether repeated stressor exposure during the light phase or dark phase is more detrimental for an organism, we exposed male C57BL/6 mice to social defeat (SD) across 19 days either in the light phase between Zeitgeber time (ZT)1 and ZT3 (SDL mice) or in the dark phase between ZT13 and ZT15 (SDD mice). While SDL mice showed a prolonged increase in adrenal weight and an attenuated adrenal responsiveness to ACTH in vitro after stressor termination, SDD mice showed reduced dark phase home-cage activity on observation days 7, 14, and 20, flattening of the diurnal corticosterone rhythm, lack of social preference, and higher in vitro IFNγ secretion from mesenteric lymph node cells on day 20/21. Furthermore, the colitis-aggravating effect of SD was more pronounced in SDD than SDL mice following dextran sulfate sodium treatment. In conclusion, the present findings demonstrate that repeated SD effects on behavior, physiology, and immunology strongly depend on the time of day of stressor exposure. Whereas physiological parameters were more affected by SD during the light/inactive phase of mice, behavioral and immunological parameters were more affected by SD during the dark phase. Our results imply that repeated daily SD exposure has a more negative outcome when applied during the dark/active phase. By contrast, the minor physiological changes seen in SDL mice might represent beneficial adaptations preventing the formation of those maladaptive consequences.
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Affiliation(s)
- Manuela S Bartlang
- Department of Neurobiology and Genetics, University of Würzburg, 97074 Würzburg, Germany
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95
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Winter J, Pantelis A, Kraus D, Reckenbeil J, Reich R, Jepsen S, Fischer HP, Allam JP, Novak N, Wenghoefer M. Human α-defensin (DEFA) gene expression helps to characterise benign and malignant salivary gland tumours. BMC Cancer 2012; 12:465. [PMID: 23050799 PMCID: PMC3518101 DOI: 10.1186/1471-2407-12-465] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [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: 05/08/2012] [Accepted: 10/02/2012] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Because of the infrequence of salivary gland tumours and their complex histopathological diagnosis it is still difficult to exactly predict their clinical course by means of recurrence, malignant progression and metastasis. In order to define new proliferation associated genes, purpose of this study was to investigate the expression of human α-defensins (DEFA) 1/3 and 4 in different tumour entities of the salivary glands with respect to malignancy. METHODS Tissue of salivary glands (n=10), pleomorphic adenomas (n=10), cystadenolymphomas (n=10), adenocarcinomas (n=10), adenoidcystic carcinomas (n=10), and mucoepidermoid carcinomas (n=10) was obtained during routine surgical procedures. RNA was extracted according to standard protocols. Transcript levels of DEFA 1/3 and 4 were analyzed by quantitative realtime PCR and compared with healthy salivary gland tissue. Additionally, the proteins encoded by DEFA 1/3 and DEFA 4 were visualized in paraffin-embedded tissue sections by immunohistochemical staining. RESULTS Human α-defensins are traceable in healthy as well as in pathological altered salivary gland tissue. In comparison with healthy tissue, the gene expression of DEFA 1/3 and 4 was significantly (p<0.05) increased in all tumours - except for a significant decrease of DEFA 4 gene expression in pleomorphic adenomas and a similar transcript level for DEFA 1/3 compared to healthy salivary glands. CONCLUSIONS A decreased gene expression of DEFA 1/3 and 4 might protect pleomorphic adenomas from malignant transformation into adenocarcinomas. A similar expression pattern of DEFA-1/3 and -4 in cystadenolymphomas and inflamed salivary glands underlines a potential importance of immunological reactions during the formation of Warthin's tumour.
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Affiliation(s)
- Jochen Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr, 1753111, Bonn, Germany
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96
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97
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Dirscherl K, Karlstetter M, Ebert S, Kraus D, Hlawatsch J, Walczak Y, Moehle C, Fuchshofer R, Langmann T. Erratum to: Luteolin triggers global changes in the microglial transcriptome leading to a unique anti-inflammatory and neuroprotective phenotype. J Neuroinflammation 2012. [PMCID: PMC3416690 DOI: 10.1186/1742-2094-9-118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Correction to Dirscherl K, Karlstetter M, Ebert S, Kraus D, Hlawatsch J, Walczak Y, Moehle C, Fuchshofer R, Langmann T. Luteolin triggers global changes in the microglial transcriptome leading to a unique anti-inflammatory and neuroprotective phenotype. J Neuroinflammation 2010, 7:3.
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98
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Linkov G, Morris L, Shah J, Bilsky M, Kraus D. First-Bite Syndrome: Incidence, Risk Factors, Treatment, and Outcomes. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314327] [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: 10/28/2022]
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99
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Winter J, Mohr S, Pantelis A, Kraus D, Allam JP, Novak N, Reich R, Martini M, Jepsen S, Götz W, Wenghoefer M. IGF-1 deficiency in combination with a low basic hBD-2 and hBD-3 gene expression might counteract malignant transformation in pleomorphic adenomas in vitro. Cancer Invest 2012; 30:106-13. [PMID: 22250586 DOI: 10.3109/07357907.2011.640651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This study investigated the IGF-1-influence on oncological relevant genes in pleomorphic adenomas. Therefore A64-tumor cells were stimulated by recombinant IGF-1. After RNA-extraction, transcript levels of hBD-1, hBD-2, hBD-3, DEFA1/3, DEFA4, S100A4, Psoriasin, DOC-1, EGF, EGFR, and IGFR were analyzed by qRT-PCR at t = 0, 4, 8, 24, 48, and 72 hr. The gene-products were visualized by immunostaining. A64-tumor-cells were deficient for hBD-1 and IGF-1. IGF-1 downregulates hBD-2 and hBD-3 without influencing hBD-1-expression. IGF-1 only slightly affects DEFA1/3-, DEFA4-, S100A4-, Psoriasin-, DOC-1-, EGF-, EGFR-, and IGFR-gene-expression. IGF-1-deficiency combined with low basic hBD-2-gene-expression and hBD-3-gene-expression might counteract, whereas hBD-1-deficiency promotes malignant transformation in pleomorphic adenomas.
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Affiliation(s)
- J Winter
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Welschnonnenstr, Bonn, Germany
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100
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Bayer S, Kraus D, Keilig L, Gölz L, Stark H, Enkling N. Changes in retention force with electroplated copings on conical crowns: a comparison of gold and zirconia primary crowns. Int J Oral Maxillofac Implants 2012; 27:577-585. [PMID: 22616051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
PURPOSE The aim of this study was to examine the wear behavior of conical crowns with electroplated gold copings that are used to connect implants and teeth to a removable denture. Gold alloy and zirconium dioxide ceramic crowns were compared. MATERIALS AND METHODS Fifteen crowns each were milled for two groups: gold alloy and zirconium dioxide. Each specimen had a 2-degree taper. The electroplated coping was established by direct electroforming. The retentive forces and the correlating distance during insertion and separation were measured after 10,000 wear cycles were applied. The wear testing was separated into a start phase, an initial wear phase, and the long-term wear period. The retention force value and the force-distance integral of the first 0.3 mm of each cycle were calculated. RESULTS The changes in retention force and integral did not differ significantly between both groups in the start and the initial wear phase. No differences were seen in force development during the long-term wear period. Only the force-distance integral showed a significant difference: the median values of the gold crowns increased slightly, and they decreased slightly for the zirconia crowns. The median force values never fell below 6 N for gold and 4 N for zirconia. CONCLUSIONS Within the limitations of this study, the tested conical crowns showed clinically acceptable retentive properties. As with other retentive elements for dentures, the specimens tested showed the greatest amount of change in retentive forces during the first 2,000 cycles. The development of retention force in both groups was not significantly different. However, the zirconia specimens showed reduced variability, which is preferable in clinical practice.
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Affiliation(s)
- Stefan Bayer
- Department of Prosthodontics, Preclinical Education and Dental Materials Science, University of Bonn, Bonn, Germany.
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