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Li S, Lu L, Bhattacharyya S, Pearce C, Li K, Nienhuis ET, Doumy G, Schaller RD, Moeller S, Lin MF, Dakovski G, Hoffman DJ, Garratt D, Larsen KA, Koralek JD, Hampton CY, Cesar D, Duris J, Zhang Z, Sudar N, Cryan JP, Marinelli A, Li X, Inhester L, Santra R, Young L. Attosecond-pump attosecond-probe x-ray spectroscopy of liquid water. Science 2024; 383:1118-1122. [PMID: 38359104 DOI: 10.1126/science.adn6059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/06/2024] [Indexed: 02/17/2024]
Abstract
Attosecond-pump/attosecond-probe experiments have long been sought as the most straightforward method for observing electron dynamics in real time. Although there has been much success with overlapped near-infrared femtosecond and extreme ultraviolet attosecond pulses combined with theory, true attosecond-pump/attosecond-probe experiments have been limited. We used a synchronized attosecond x-ray pulse pair from an x-ray free-electron laser to study the electronic response to valence ionization in liquid water through all x-ray attosecond transient absorption spectroscopy (AX-ATAS). Our analysis showed that the AX-ATAS response is confined to the subfemtosecond timescale, eliminating any hydrogen atom motion and demonstrating experimentally that the 1b1 splitting in the x-ray emission spectrum is related to dynamics and is not evidence of two structural motifs in ambient liquid water.
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Affiliation(s)
- Shuai Li
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - Lixin Lu
- Department of Chemistry, University of Washington, Seattle, WA, USA
| | - Swarnendu Bhattacharyya
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - Carolyn Pearce
- Pacific Northwest National Laboratory, Richland, WA, USA
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, USA
| | - Kai Li
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
- Department of Physics and James Franck Institute, The University of Chicago, Chicago, IL, USA
| | | | - Gilles Doumy
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - R D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - S Moeller
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - M-F Lin
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - G Dakovski
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - D J Hoffman
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - D Garratt
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Kirk A Larsen
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - J D Koralek
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - C Y Hampton
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - D Cesar
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Joseph Duris
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Z Zhang
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Nicholas Sudar
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - James P Cryan
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - A Marinelli
- SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, WA, USA
| | - Ludger Inhester
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - Robin Santra
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
- Department of Physics, Universität Hamburg, Hamburg, Germany
| | - Linda Young
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
- Department of Physics and James Franck Institute, The University of Chicago, Chicago, IL, USA
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2
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Nelson MJ, Moeller S, Seckin M, Rogalski EJ, Mesulam MM, Hurley RS. The eyes speak when the mouth cannot: Using eye movements to interpret omissions in primary progressive aphasia. Neuropsychologia 2023; 184:108530. [PMID: 36906222 PMCID: PMC10166577 DOI: 10.1016/j.neuropsychologia.2023.108530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/12/2023]
Abstract
Though it may seem simple, object naming is a complex multistage process that can be impaired by lesions at various sites of the language network. Individuals with neurodegenerative disorders of language, known as primary progressive aphasias (PPA), have difficulty with naming objects, and instead frequently say "I don't know" or fail to give a vocal response at all, known as an omission. Whereas other types of naming errors (paraphasias) give clues as to which aspects of the language network have been compromised, the mechanisms underlying omissions remain largely unknown. In this study, we used a novel eye tracking approach to probe the cognitive mechanisms of omissions in the logopenic and semantic variants of PPA (PPA-L and PPA-S). For each participant, we identified pictures of common objects (e.g., animals, tools) that they could name aloud correctly, as well as pictures that elicited an omission. In a separate word-to-picture matching task, those pictures appeared as targets embedded among an array with 15 foils. Participants were given a verbal cue and tasked with pointing to the target, while eye movements were monitored. On trials with correctly-named targets, controls and both PPA groups ceased visual search soon after foveating the target. On omission trials, however, the PPA-S group failed to stop searching, and went on to view many foils "post-target". As further indication of impaired word knowledge, gaze of the PPA-S group was subject to excessive "taxonomic capture", such that they spent less time viewing the target and more time viewing related foils on omission trials. In contrast, viewing behavior of the PPA-L group was similar to controls on both correctly-named and omission trials. These results indicate that the mechanisms of omission in PPA differ by variant. In PPA-S, anterior temporal lobe degeneration causes taxonomic blurring, such that words from the same category can no longer be reliably distinguished. In PPA-L, word knowledge remains relatively intact, and omissions instead appear to be caused by downstream factors (e.g., lexical access, phonological encoding). These findings demonstrate that when words fail, eye movements can be particularly informative.
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Affiliation(s)
- M J Nelson
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL USA, 60611; Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, USA; Department of Neurosurgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35249, USA.
| | - S Moeller
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL USA, 60611; Department of Psychology, University of Nevada, Las Vegas, NV 89154, USA
| | - M Seckin
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL USA, 60611; Department of Neurology, Acıbadem Mehmet Ali Aydınlar University School of Medicine, İstanbul, 34684, Turkey
| | - E J Rogalski
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL USA, 60611; Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, USA
| | - M-M Mesulam
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL USA, 60611; Department of Neurology, Feinberg School of Medicine, Northwestern University, USA
| | - R S Hurley
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL USA, 60611; Department of Psychology, Cleveland State University, Cleveland, OH, 44115, USA.
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3
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Ruiz-Gómez G, Salbach-Hirsch J, Dürig JN, Köhler L, Balamurugan K, Rother S, Heidig SL, Moeller S, Schnabelrauch M, Furesi G, Pählig S, Guillem-Gloria PM, Hofbauer C, Hintze V, Pisabarro MT, Rademann J, Hofbauer LC. Rational engineering of glycosaminoglycan-based Dickkopf-1 scavengers to improve bone regeneration. Biomaterials 2023; 297:122105. [PMID: 37031548 DOI: 10.1016/j.biomaterials.2023.122105] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 03/13/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
The WNT signaling pathway is a central regulator of bone development and regeneration. Functional alterations of WNT ligands and inhibitors are associated with a variety of bone diseases that affect bone fragility and result in a high medical and socioeconomic burden. Hence, this cellular pathway has emerged as a novel target for bone-protective therapies, e.g. in osteoporosis. Here, we investigated glycosaminoglycan (GAG) recognition by Dickkopf-1 (DKK1), a potent endogenous WNT inhibitor, and the underlying functional implications in order to develop WNT signaling regulators. In a multidisciplinary approach we applied in silico structure-based de novo design strategies and molecular dynamics simulations combined with synthetic chemistry and surface plasmon resonance spectroscopy to Rationally Engineer oligomeric Glycosaminoglycan derivatives (REGAG) with improved neutralizing properties for DKK1. In vitro and in vivo assays show that the GAG modification to obtain REGAG translated into increased WNT pathway activity and improved bone regeneration in a mouse calvaria defect model with critical size bone lesions. Importantly, the developed REGAG outperformed polymeric high-sulfated hyaluronan (sHA3) in enhancing bone healing up to 50% due to their improved DKK1 binding properties. Thus, rationally engineered GAG variants may represent an innovative strategy to develop novel therapeutic approaches for regenerative medicine.
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Affiliation(s)
- Gloria Ruiz-Gómez
- Structural Bioinformatics, BIOTEC, Technische Universität Dresden, Tatzberg 47/51, D-01307, Dresden, Germany
| | - Juliane Salbach-Hirsch
- Division of Endocrinology, Diabetes and Bone Diseases & Center for Healthy Aging, Department of Medicine III, Technische Universität Dresden Medical Center, Fetscherstraße 74, D-01307, Dresden, Germany
| | - Jan-Niklas Dürig
- Institute of Pharmacy - Medicinal Chemistry, Freie Universität Berlin, Königin-Luise-Str. 2+4, D-14195, Berlin, Germany
| | - Linda Köhler
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069, Dresden, Germany
| | - Kanagasabai Balamurugan
- Structural Bioinformatics, BIOTEC, Technische Universität Dresden, Tatzberg 47/51, D-01307, Dresden, Germany
| | - Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069, Dresden, Germany
| | - Sophie-Luise Heidig
- Structural Bioinformatics, BIOTEC, Technische Universität Dresden, Tatzberg 47/51, D-01307, Dresden, Germany
| | | | | | - Giulia Furesi
- Division of Endocrinology, Diabetes and Bone Diseases & Center for Healthy Aging, Department of Medicine III, Technische Universität Dresden Medical Center, Fetscherstraße 74, D-01307, Dresden, Germany
| | - Sophie Pählig
- Division of Endocrinology, Diabetes and Bone Diseases & Center for Healthy Aging, Department of Medicine III, Technische Universität Dresden Medical Center, Fetscherstraße 74, D-01307, Dresden, Germany
| | - Pedro M Guillem-Gloria
- Structural Bioinformatics, BIOTEC, Technische Universität Dresden, Tatzberg 47/51, D-01307, Dresden, Germany
| | - Christine Hofbauer
- National Center for Tumor Diseases/University Cancer Center Dresden, Technische Universität Dresden Medical Center, Fetscherstraße 74, D-01307, Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069, Dresden, Germany.
| | - M Teresa Pisabarro
- Structural Bioinformatics, BIOTEC, Technische Universität Dresden, Tatzberg 47/51, D-01307, Dresden, Germany.
| | - Jörg Rademann
- Institute of Pharmacy - Medicinal Chemistry, Freie Universität Berlin, Königin-Luise-Str. 2+4, D-14195, Berlin, Germany.
| | - Lorenz C Hofbauer
- Division of Endocrinology, Diabetes and Bone Diseases & Center for Healthy Aging, Department of Medicine III, Technische Universität Dresden Medical Center, Fetscherstraße 74, D-01307, Dresden, Germany; Center for Regenerative Therapies Dresden, Technische Universität Dresden, Fetscherstraße 105, D-01307, Dresden, Germany.
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4
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Assefa TA, Seaberg MH, Reid AH, Shen L, Esposito V, Dakovski GL, Schlotter W, Holladay B, Streubel R, Montoya SA, Hart P, Nakahara K, Moeller S, Kevan SD, Fischer P, Fullerton EE, Colocho W, Lutman A, Decker FJ, Sinha SK, Roy S, Blackburn E, Turner JJ. The fluctuation-dissipation measurement instrument at the Linac Coherent Light Source. Rev Sci Instrum 2022; 93:083902. [PMID: 36050107 DOI: 10.1063/5.0091297] [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] [Received: 03/14/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
The development of new modes at x-ray free electron lasers has inspired novel methods for studying fluctuations at different energies and timescales. For closely spaced x-ray pulses that can be varied on ultrafast time scales, we have constructed a pair of advanced instruments to conduct studies targeting quantum materials. We first describe a prototype instrument built to test the proof-of-principle of resonant magnetic scattering using ultrafast pulse pairs. This is followed by a description of a new endstation, the so-called fluctuation-dissipation measurement instrument, which was used to carry out studies with a fast area detector. In addition, we describe various types of diagnostics for single-shot contrast measurements, which can be used to normalize data on a pulse-by-pulse basis and calibrate pulse amplitude ratios, both of which are important for the study of fluctuations in materials. Furthermore, we present some new results using the instrument that demonstrates access to higher momentum resolution.
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Affiliation(s)
- T A Assefa
- Stanford Institute for Materials and Energy Science, Stanford University and SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M H Seaberg
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - A H Reid
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - L Shen
- Stanford Institute for Materials and Energy Science, Stanford University and SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - V Esposito
- Stanford Institute for Materials and Energy Science, Stanford University and SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - G L Dakovski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - W Schlotter
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - B Holladay
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - R Streubel
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Physics Department, University of California Santa Cruz, Santa Cruz, California 95064, USA
| | - S A Montoya
- Center for Memory and Recording Research, University of California-San Diego, La Jolla, California 92093, USA
| | - P Hart
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - K Nakahara
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S Moeller
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S D Kevan
- Department of Physics, University of Oregon, Eugene, Oregon 97401, USA
| | - P Fischer
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Physics Department, University of California Santa Cruz, Santa Cruz, California 95064, USA
| | - E E Fullerton
- Center for Memory and Recording Research, University of California-San Diego, La Jolla, California 92093, USA
| | - W Colocho
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - A Lutman
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - F-J Decker
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S K Sinha
- Department of Physics, University of California-San Diego, La Jolla, California 92093, USA
| | - S Roy
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - E Blackburn
- Division of Synchrotron Radiation Research, Department of Physics, Lund University, 22100 Lund, Sweden
| | - J J Turner
- Stanford Institute for Materials and Energy Science, Stanford University and SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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van Dongen L, de Goede P, Moeller S, Eroglu T, Folke F, Gislason G, Blom M, Elders P, Torp-Pedersen C, Tan H. Temporal variation in out-of-hospital cardiac arrest occurrence in individuals with or without diabetes. Resusc Plus 2021; 8:100167. [PMID: 34604822 PMCID: PMC8473536 DOI: 10.1016/j.resplu.2021.100167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/24/2021] [Accepted: 09/04/2021] [Indexed: 11/18/2022] Open
Abstract
Objective Out-of-hospital cardiac arrest (OHCA) occurrence has been shown to exhibit a circadian rhythm, following the circadian rhythm of acute myocardial infarction (AMI) occurrence. Diabetes mellitus (DM) is associated with changes in circadian rhythm. We aimed to compare the temporal variation of OHCA occurrence over the day and week between OHCA patients with DM and those without. Methods In two population-based OHCA registries (Amsterdam Resuscitation Studies [ARREST] 2010-2016, n = 4163, and Danish Cardiac Arrest Registry [DANCAR], 2010-2014, n = 12,734), adults (≥18y) with presumed cardiac cause of OHCA and available medical history were included. Single and double cosinor analysis was performed to model circadian variation of OHCA occurrence. Stratified analysis of circadian variation was performed in patients with AMI as immediate cause of OHCA. Results DM patients (22.8% in ARREST, 24.2% in DANCAR) were older and more frequently had cardiovascular risk factors or previous cardiovascular disease. Both cohorts showed 24 h-rhythmicity, with significant amplitudes in single and double cosinor functions (P-range < 0.001). In both registries, a morning peak (10:00-11:00) and an evening peak (20:00-21:00) was observed in both DM and non-DM patients. No septadian variation was observed in either DM or non-DM patients (P-range 0.13-84). Conclusions In these two population-based OHCA registries, we observed a similar circadian rhythm of OHCA occurrence in DM and non-DM patients.
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Affiliation(s)
- L.H. van Dongen
- Amsterdam UMC, Academic Medical Center, University of Amsterdam, Department of Experimental and Clinical Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Meibergdreef 9, Amsterdam, the Netherlands
| | - P. de Goede
- Laboratory of Endocrinology, Amsterdam University Medical Center, University of Amsterdam, Amsterdam Gastroenterology, Endocrinology and Metabolism, Amsterdam, the Netherlands
- Hypothalamic Integration Mechanisms Group, Netherlands Institute for Neuroscience (NIN), an Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, the Netherlands
| | - S. Moeller
- Department of Cardiology, Copenhagen University Hospital Gentofte, Hellerup, Denmark
| | - T.E. Eroglu
- Amsterdam UMC, Academic Medical Center, University of Amsterdam, Department of Experimental and Clinical Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Meibergdreef 9, Amsterdam, the Netherlands
- Department of Cardiology, Copenhagen University Hospital Gentofte, Hellerup, Denmark
| | - F. Folke
- Department of Cardiology, Copenhagen University Hospital Gentofte, Hellerup, Denmark
- Emergency Medical Services Copenhagen, University of Copenhagen, Denmark
| | - G. Gislason
- Department of Cardiology, Copenhagen University Hospital Gentofte, Hellerup, Denmark
- The Danish Heart Foundation, Copenhagen, Denmark
| | - M.T. Blom
- Amsterdam UMC, Academic Medical Center, University of Amsterdam, Department of Experimental and Clinical Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Meibergdreef 9, Amsterdam, the Netherlands
| | - P.J.M. Elders
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Epidemiology and Biostatistics, Amsterdam Public Health Research Institute, De Boelelaan 1117, Amsterdam, Netherlands
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of General Practice Medicine, Amsterdam Public Health Institute, De Boelelaan 1117, Amsterdam, Netherlands
| | - C. Torp-Pedersen
- Department of Cardiology, North Zealand Hospital, Hillerød, Denmark
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
- Department of Public Health, University of Copenhagen, Denmark
| | - H.L. Tan
- Amsterdam UMC, Academic Medical Center, University of Amsterdam, Department of Experimental and Clinical Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Meibergdreef 9, Amsterdam, the Netherlands
- Netherlands Heart Institute, Utrecht, the Netherlands
- Corresponding author at: Amsterdam UMC, Academic Medical Center, Heart Center, Department of Cardiology, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands.
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6
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Al-Maawi S, Rother S, Halfter N, Fiebig KM, Moritz J, Moeller S, Schnabelrauch M, Kirkpatrick CJ, Sader R, Wiesmann HP, Scharnweber D, Hintze V, Ghanaati S. Covalent linkage of sulfated hyaluronan to the collagen scaffold Mucograft® enhances scaffold stability and reduces proinflammatory macrophage activation in vivo. Bioact Mater 2021; 8:420-434. [PMID: 34541411 PMCID: PMC8429620 DOI: 10.1016/j.bioactmat.2021.06.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 06/07/2021] [Accepted: 06/07/2021] [Indexed: 12/15/2022] Open
Abstract
Sulfated glycosaminoglycans (sGAG) show interaction with biological mediator proteins. Although collagen-based biomaterials are widely used in clinics, their combination with high-sulfated hyaluronan (sHA3) is unexplored. This study aims to functionalize a collagen-based scaffold (Mucograft®) with sHA3 via electrostatic (sHA3/PBS) or covalent binding to collagen fibrils (sHA3+EDC/NHS). Crosslinking without sHA3 was used as a control (EDC/NHS Ctrl). The properties of the sHA3-functionalized materials were characterized. In vitro growth factor and cytokine release after culturing with liquid platelet-rich fibrin was performed by means of ELISA. The cellular reaction to the biomaterials was analyzed in a subcutaneous rat model. The study revealed that covalent linking of sHA3 to collagen allowed only a marginal release of sHA3 over 28 days in contrast to electrostatically bound sHA3. sHA3+EDC/NHS scaffolds showed reduced vascular endothelial growth factor (VEGF), transforming growth factor beta 1 (TGF-β1) and enhanced interleukin-8 (IL-8) and epithelial growth factor (EGF) release in vitro compared to the other scaffolds. Both sHA3/PBS and EDC/NHS Ctrl scaffolds showed a high proinflammatory reaction (M1: CD-68+/CCR7+) and induced multinucleated giant cell (MNGC) formation in vivo. Only sHA3+EDC/NHS scaffolds reduced the proinflammatory macrophage M1 response and did not induce MNGC formation during the 30 days. SHA3+EDC/NHS scaffolds had a stable structure in vivo and showed sufficient integration into the implantation region after 30 days, whereas EDC/NHS Ctrl scaffolds underwent marked disintegration and lost their initial structure. In summary, functionalized collagen (sHA3+EDC/NHS) modulates the inflammatory response and is a promising biomaterial as a stable scaffold for full-thickness skin regeneration in the future. Covalent linking of high-sulfated hyaluronan (sHA3) to collagen allows a sustained release of sHA3. Covalent linking of sHA3 to collagen modulates the release of growth factor and cytokines in vitro. Covalent linking of sHA3 to collagen suppresses the induction of multinucleated giant cells in vivo. Covalent linking of sHA3 to collagen reduces the proinflammatory macrophage M1 response in vivo. Functionalized collagen with sHA3 is promising for full-thickness skin regeneration.
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Affiliation(s)
- Sarah Al-Maawi
- Clinic for Maxillofacial and Plastic Surgery, Goethe University, Frankfurt Am Main, Germany
| | - Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany.,Department of Cellular and Molecular Medicine, Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA
| | - Norbert Halfter
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Karen M Fiebig
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Juliane Moritz
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V., Prüssingstr. 27B, 07745, Jena, Germany
| | | | | | - Robert Sader
- Clinic for Maxillofacial and Plastic Surgery, Goethe University, Frankfurt Am Main, Germany
| | - Hans-Peter Wiesmann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Shahram Ghanaati
- Clinic for Maxillofacial and Plastic Surgery, Goethe University, Frankfurt Am Main, Germany
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7
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Rother S, Ruiz-Gómez G, Balamurugan K, Koehler L, Fiebig KM, Galiazzo VD, Hempel U, Moeller S, Schnabelrauch M, Waltenberger J, Pisabarro MT, Scharnweber D, Hintze V. Hyaluronan/Collagen Hydrogels with Sulfated Glycosaminoglycans Maintain VEGF165 Activity and Fine-Tune Endothelial Cell Response. ACS Appl Bio Mater 2020; 4:494-506. [DOI: 10.1021/acsabm.0c01001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Gloria Ruiz-Gómez
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg 47-51, Dresden 01307, Germany
| | | | - Linda Koehler
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Karen M. Fiebig
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Vanessa D. Galiazzo
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Ute Hempel
- Institute of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, TU Dresden, Fiedlerstraße 42, 01307 Dresden, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V., Prüssingstr. 27B, 07745 Jena, Germany
| | | | - Johannes Waltenberger
- Department of Cardiovascular Medicine, University of Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
| | - M. Teresa Pisabarro
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg 47-51, Dresden 01307, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
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8
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Kjellsson L, Nanda KD, Rubensson JE, Doumy G, Southworth SH, Ho PJ, March AM, Al Haddad A, Kumagai Y, Tu MF, Schaller RD, Debnath T, Bin Mohd Yusof MS, Arnold C, Schlotter WF, Moeller S, Coslovich G, Koralek JD, Minitti MP, Vidal ML, Simon M, Santra R, Loh ZH, Coriani S, Krylov AI, Young L. Resonant Inelastic X-Ray Scattering Reveals Hidden Local Transitions of the Aqueous OH Radical. Phys Rev Lett 2020; 124:236001. [PMID: 32603165 DOI: 10.1103/physrevlett.124.236001] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/01/2020] [Accepted: 05/22/2020] [Indexed: 05/06/2023]
Abstract
Resonant inelastic x-ray scattering (RIXS) provides remarkable opportunities to interrogate ultrafast dynamics in liquids. Here we use RIXS to study the fundamentally and practically important hydroxyl radical in liquid water, OH(aq). Impulsive ionization of pure liquid water produced a short-lived population of OH(aq), which was probed using femtosecond x-rays from an x-ray free-electron laser. We find that RIXS reveals localized electronic transitions that are masked in the ultraviolet absorption spectrum by strong charge-transfer transitions-thus providing a means to investigate the evolving electronic structure and reactivity of the hydroxyl radical in aqueous and heterogeneous environments. First-principles calculations provide interpretation of the main spectral features.
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Affiliation(s)
- L Kjellsson
- Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| | - K D Nanda
- Department of Chemistry, University of Southern California, Los Angeles, California 90007, USA
| | - J-E Rubensson
- Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
| | - G Doumy
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - S H Southworth
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - P J Ho
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - A M March
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - A Al Haddad
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Y Kumagai
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - M-F Tu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - R D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
| | - T Debnath
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 639798
| | - M S Bin Mohd Yusof
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 639798
| | - C Arnold
- Center for Free-Electron Laser Science, DESY, 22607 Hamburg, Germany
- Department of Physics, Universität Hamburg, 20146 Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, 22607 Hamburg, Germany
| | - W F Schlotter
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S Moeller
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - G Coslovich
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - J D Koralek
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M P Minitti
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M L Vidal
- DTU Chemistry-Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - M Simon
- Sorbonne Université and CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, 75252 Paris Cedex 05, France
| | - R Santra
- Center for Free-Electron Laser Science, DESY, 22607 Hamburg, Germany
- Department of Physics, Universität Hamburg, 20146 Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, 22607 Hamburg, Germany
| | - Z-H Loh
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 639798
| | - S Coriani
- DTU Chemistry-Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - A I Krylov
- Department of Chemistry, University of Southern California, Los Angeles, California 90007, USA
| | - L Young
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
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9
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Nelson MJ, Moeller S, Basu A, Christopher L, Rogalski EJ, Greicius M, Weintraub S, Bonakdarpour B, Hurley RS, Mesulam MM. Taxonomic Interference Associated with Phonemic Paraphasias in Agrammatic Primary Progressive Aphasia. Cereb Cortex 2020; 30:2529-2541. [PMID: 31800048 PMCID: PMC7174997 DOI: 10.1093/cercor/bhz258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 09/17/2019] [Indexed: 11/14/2022] Open
Abstract
Phonemic paraphasias are thought to reflect phonological (post-semantic) deficits in language production. Here we present evidence that phonemic paraphasias in non-semantic primary progressive aphasia (PPA) may be associated with taxonomic interference. Agrammatic and logopenic PPA patients and control participants performed a word-to-picture visual search task where they matched a stimulus noun to 1 of 16 object pictures as their eye movements were recorded. Participants were subsequently asked to name the same items. We measured taxonomic interference (ratio of time spent viewing related vs. unrelated foils) during the search task for each item. Target items that elicited a phonemic paraphasia during object naming elicited increased taxonomic interference during the search task in agrammatic but not logopenic PPA patients. These results could reflect either very subtle sub-clinical semantic distortions of word representations or partial degradation of specific phonological word forms in agrammatic PPA during both word-to-picture matching (input stage) and picture naming (output stage). The mechanism for phonemic paraphasias in logopenic patients seems to be different and to be operative at the pre-articulatory stage of phonological retrieval. Glucose metabolic imaging suggests that degeneration in the left posterior frontal lobe and left temporo-parietal junction, respectively, might underlie these different patterns of phonemic paraphasia.
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Affiliation(s)
- M J Nelson
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Neurological Surgery, Feinberg School of Medicine , Northwestern University, Chicago, IL 60611, USA
- Department of Neurosurgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - S Moeller
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - A Basu
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - L Christopher
- Department of Neurology and Neurological Sciences, FIND Lab, Stanford University, Stanford, CA 94304, USA
| | - E J Rogalski
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - M Greicius
- Department of Neurology and Neurological Sciences, FIND Lab, Stanford University, Stanford, CA 94304, USA
| | - S Weintraub
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Neurology, Feinberg School of Medicine , Northwestern University, Chicago, IL 60611, USA
| | - B Bonakdarpour
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - R S Hurley
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Psychology, Cleveland State University, Cleveland, OH 44115, USA
| | - M-M Mesulam
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Neurology, Feinberg School of Medicine , Northwestern University, Chicago, IL 60611, USA
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10
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Loh ZH, Doumy G, Arnold C, Kjellsson L, Southworth SH, Al Haddad A, Kumagai Y, Tu MF, Ho PJ, March AM, Schaller RD, Bin Mohd Yusof MS, Debnath T, Simon M, Welsch R, Inhester L, Khalili K, Nanda K, Krylov AI, Moeller S, Coslovich G, Koralek J, Minitti MP, Schlotter WF, Rubensson JE, Santra R, Young L. Observation of the fastest chemical processes in the radiolysis of water. Science 2020; 367:179-182. [DOI: 10.1126/science.aaz4740] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 11/15/2019] [Indexed: 01/01/2023]
Abstract
Elementary processes associated with ionization of liquid water provide a framework for understanding radiation-matter interactions in chemistry and biology. Although numerous studies have been conducted on the dynamics of the hydrated electron, its partner arising from ionization of liquid water, H2O+, remains elusive. We used tunable femtosecond soft x-ray pulses from an x-ray free electron laser to reveal the dynamics of the valence hole created by strong-field ionization and to track the primary proton transfer reaction giving rise to the formation of OH. The isolated resonance associated with the valence hole (H2O+/OH) enabled straightforward detection. Molecular dynamics simulations revealed that the x-ray spectra are sensitive to structural dynamics at the ionization site. We found signatures of hydrated-electron dynamics in the x-ray spectrum.
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Affiliation(s)
- Z.-H. Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
| | - G. Doumy
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - C. Arnold
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- Department of Physics, Universität Hamburg, Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - L. Kjellsson
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
- European XFEL GmbH, Schenefeld, Germany
| | - S. H. Southworth
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - A. Al Haddad
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - Y. Kumagai
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - M.-F. Tu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - P. J. Ho
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - A. M. March
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
| | - R. D. Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
- Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - M. S. Bin Mohd Yusof
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
| | - T. Debnath
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
| | - M. Simon
- Sorbonne Université and CNRS, Laboratoire de Chemie Physique-Matière et Rayonnement, LCPMR, F-750005 Paris, France
| | - R. Welsch
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - L. Inhester
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
| | - K. Khalili
- Department of Energy Conversion and Storage, Technical University of Denmark, Roskilde, Denmark
| | - K. Nanda
- Department of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - A. I. Krylov
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- Department of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - S. Moeller
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - G. Coslovich
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - J. Koralek
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - M. P. Minitti
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - W. F. Schlotter
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - J.-E. Rubensson
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
| | - R. Santra
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- Department of Physics, Universität Hamburg, Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
| | - L. Young
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA
- Department of Physics and James Franck Institute, University of Chicago, Chicago, IL, USA
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11
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Moeller S, Patan-Zugaj B, Däullary T, Tichy A, Licka TF. The influence of trimming of the hoof wall on the damage of laminar tissue after loading: An in vitro study. Vet J 2019; 250:63-70. [PMID: 31383422 DOI: 10.1016/j.tvjl.2019.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 06/30/2019] [Accepted: 07/02/2019] [Indexed: 01/19/2023]
Abstract
Laminitis is associated with failure of the suspensory apparatus of the distal phalanx (SADP) connecting the distal phalanx to the hoof wall. The specific aim of this study was to examine in vitro whether thinning of the hoof wall leading to increased deformability influences the damage of the laminar tissue created by loading of the hoof. Paired cadaver forelimbs from twelve horses were used. For each pair, the hoof wall from one hoof was thinned by 25%; this was ascertained by radiography. The contralateral hooves were used as controls. In a material testing machine, hooves were loaded in a proximodistal direction at 0.5mm/s until a cut-off value of 8kN or 14mm was reached. Afterwards, samples of the SADP were taken for histology. Image-based evaluation of the destruction of the SADP was performed using quantitative histogram analysis. Additionally, three examiners masked to treatment (trimmed/untrimmed) qualitatively evaluated SADP destruction. During hoof loading with forces from 0.5 to 1.8 times the body mass of the donor horses, hooves with thinned hoof wall underwent significantly more deformation (P<0.05). Quantitative histogram analysis detected a shift to higher brightness values and a higher pixel intensity in control hooves, representing disruption in the histologic analysis. Qualitative evaluation of histology sections showed significantly more disruption of the SADP in untrimmed hooves (P=0.03). These results confirm the hypothesis that reduced hoof wall thickness can decrease disruption of laminar tissue in vitro, thus supporting the evaluation of hoof wall reduction as a prophylactic measure in horses at imminent risk of SADP failure.
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Affiliation(s)
- S Moeller
- University Clinic for Horses, Department of Companion Animals and Horses, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria.
| | - B Patan-Zugaj
- Department for Pathobiology, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
| | - T Däullary
- Institute of Tissue Engineering and Regenerative Medicine, University Clinic Würzburg, Röntgenring 11, 97082 Würzburg, Germany
| | - A Tichy
- Department of Biomedical Sciences, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
| | - T F Licka
- University Clinic for Horses, Department of Companion Animals and Horses, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria; Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian EH25 9RG, Scotland, UK
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12
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Rother S, Krönert V, Hauck N, Berg A, Moeller S, Schnabelrauch M, Thiele J, Scharnweber D, Hintze V. Hyaluronan/collagen hydrogel matrices containing high-sulfated hyaluronan microgels for regulating transforming growth factor-β1. J Mater Sci Mater Med 2019; 30:65. [PMID: 31127393 DOI: 10.1007/s10856-019-6267-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
Hyaluronan (HA)-based microgels generated in a microfluidic approach, containing an artificial extracellular matrix composed of collagen and high-sulfated hyaluronan (sHA3), were incorporated into a HA/collagen-based hydrogel matrix. This significantly enhanced the retention of noncrosslinked sHA3 within the gels enabling controlled sHA3 presentation. Gels containing sHA3 bound higher amounts of transforming growth factor-β1 (TGF-β1) compared to pure HA/collagen hydrogels. Moreover, the presence of sHA3-containing microgels improved the TGF-β1 retention within the hydrogels. These findings are promising for developing innovative biomaterials with adjustable sHA3 release and growth factor interaction profiles to foster skin repair, e.g., by rebalancing dysregulated TGF-β1 levels.
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Affiliation(s)
- Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany.
| | - Vera Krönert
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Nicolas Hauck
- Institute of Physical Chemistry and Polymer Physics, Leibniz-Institut für Polymerforschung Dresden e.V., 01069, Dresden, Germany
| | - Albrecht Berg
- Biomaterials Department, INNOVENT e.V., Prüssingstr. 27B, 07745, Jena, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V., Prüssingstr. 27B, 07745, Jena, Germany
| | | | - Julian Thiele
- Institute of Physical Chemistry and Polymer Physics, Leibniz-Institut für Polymerforschung Dresden e.V., 01069, Dresden, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069, Dresden, Germany
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13
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Schmidt JR, Vogel S, Moeller S, Kalkhof S, Schubert K, von Bergen M, Hempel U. Sulfated hyaluronic acid and dexamethasone possess a synergistic potential in the differentiation of osteoblasts from human bone marrow stromal cells. J Cell Biochem 2019; 120:8706-8722. [PMID: 30485523 DOI: 10.1002/jcb.28158] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 08/14/2018] [Accepted: 11/05/2018] [Indexed: 01/24/2023]
Abstract
The development of novel bioactive biomaterials is urgently needed to meet the needs of an aging population. Both sulfated hyaluronic acid and dexamethasone are candidates for the functionalization of bone grafts, as they have been shown to enhance the differentiation of osteoblasts from bone marrow stromal cells in vitro and in vivo. However, the underlying mechanisms are not fully understood. Furthermore, studies combining different approaches to assess synergistic potentials are rare. In this study, we aim to gain insights into the mode of action of both sulfated hyaluronic acid and dexamethasone by a comprehensive analysis of the cellular fraction, released matrix vesicles, and the extracellular matrix, combining classical biochemical assays with mass spectrometry-based proteomics, supported by novel bioinformatical computations. We found elevated differentiation levels for both treatments, which were further enhanced by a combination of sulfated hyaluronic acid and dexamethasone. Single treatments revealed specific effects on osteogenic differentiation. Dexamethasone activates signalling pathways involved in the differentiation of osteoblasts, for example, CXC-motif chemokine receptor type 4 and mitogen-activated protein kinases. The effects of sulfated hyaluronic acid were predominantly linked to an alteration in the composition of the extracellular matrix, affecting the synthesis, secretion, and/or activity of fibrillary (fibronectin and thrombospondin-2) and nonfibrillary (transglutaminase-2, periostin, and lysyloxidase) extracellular matrix components, including proteases and their inhibitors (matrix metalloproteinase-2, tissue inhibitor of metalloproteinase-3). The effects were treatment specific, and less additive or contrary effects were found. Thus, we anticipate that the synergistic action of the treatment-specific effects is the key driver in elevated osteogenesis.
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Affiliation(s)
- Johannes R Schmidt
- Department for Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Sarah Vogel
- Institute of Physiological Chemistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | | | - Stefan Kalkhof
- Department for Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Kristin Schubert
- Department for Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany.,Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Martin von Bergen
- Department for Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany.,Institute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany
| | - Ute Hempel
- Institute of Physiological Chemistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
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14
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Thönes S, Rother S, Wippold T, Blaszkiewicz J, Balamurugan K, Moeller S, Ruiz-Gómez G, Schnabelrauch M, Scharnweber D, Saalbach A, Rademann J, Pisabarro MT, Hintze V, Anderegg U. Hyaluronan/collagen hydrogels containing sulfated hyaluronan improve wound healing by sustained release of heparin-binding EGF-like growth factor. Acta Biomater 2019; 86:135-147. [PMID: 30660005 DOI: 10.1016/j.actbio.2019.01.029] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 01/08/2019] [Accepted: 01/14/2019] [Indexed: 12/21/2022]
Abstract
Functional biomaterials that are able to bind, stabilize and release bioactive proteins in a defined manner are required for the controlled delivery of such to the desired place of action, stimulating wound healing in health-compromised patients. Glycosaminoglycans (GAG) represent a very promising group of components since they may be functionally engineered and are well tolerated by the recipient tissues due to their relative immunological inertness. Ligands of the Epidermal Growth Factor (EGF) receptor (EGFR) activate keratinocytes and dermal fibroblasts and, thus, contribute to skin wound healing. Heparin-binding EGF-like growth factor (HB-EGF) bound to GAG in biomaterials (e.g. hydrogels) might serve as a reservoir that induces prolonged activation of the EGF receptor and to recover disturbed wound healing. Based on previous findings, the capacity of hyaluronan (HA) and its sulfated derivatives (sHA) to bind and release HB-EGF from HA/collagen-based hydrogels was investigated. Docking and molecular dynamics analysis of a molecular model of HB-EGF led to the identification of residues in the heparin-binding domain of the protein being essential for the recognition of GAG derivatives. Furthermore, molecular modeling and surface plasmon resonance (SPR) analyses demonstrated that sulfation of HA increases binding strength to HB-EGF thus providing a rationale for the development of sHA-containing hydrogels. In line with computational observations and in agreement with SPR results, gels containing sHA displayed a retarded HB-EGF release in vitro compared to pure HA/collagen gels. Hydrogels containing HA and collagen or a mixture with sHA were shown to bind and release bioactive HB-EGF over at least 72 h, which induced keratinocyte migration, EGFR-signaling and HGF expression in dermal fibroblasts. Importantly, hydrogels containing sHA strongly increased the effectivity of HB-EGF in inducing epithelial tip growth in epithelial wounds shown in a porcine skin organ culture model. These findings suggest that hydrogels containing HA and sHA can be engineered for smart and effective wound dressings. STATEMENT OF SIGNIFICANCE: Immobilization and sustained release of recombinant proteins from functional biomaterials might overcome the limited success of direct application of non-protected solute growth factors during the treatment of impaired wound healing. We developed HA/collagen-based hydrogels supplemented with acrylated sulfated HA for binding and release of HB-EGF. We analyzed the molecular basis of HB-EGF interaction with HA and its chemical derivatives by in silico modeling and surface plasmon resonance. These hydrogels bind HB-EGF reversibly. Using different in vitro assays and organ culture we demonstrate that the introduction of sulfated HA into the hydrogels significantly increases the effectivity of HB-EGF action on target cells. Therefore, sulfated HA-containing hydrogels are promising functional biomaterials for the development of mediator releasing wound dressings.
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15
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Reese-Petersen AL, Wiese S, Moeller S, Genovese S. P4759Myocardial fibrosis is reflected by two novel biomarkers of collagen formation in patients with cirrhosis: results from a prospective study with advanced cardiac MRI. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - S Wiese
- Hvidovre Hospital - Copenhagen University Hospital, Department of Clinical Physiology and Nuclear Medicine, Hvidovre, Denmark
| | - S Moeller
- Hvidovre Hospital - Copenhagen University Hospital, Department of Clinical Physiology and Nuclear Medicine, Hvidovre, Denmark
| | - S Genovese
- Nordic Bioscience, Cardiovascular Fibrosis, Herlev, Denmark
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16
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Kjeldsen S, Mohr G, Moeller S, Kragholm K, Wissenberg M, Hansen S, Koeber L, Lippert F, Folke F, Andersson C, Gislason G, Torp-Pedersen C, Weeke P. P3808Proarrhythmic pharmacotherapy and out-of-hospital cardiac arrest - a nationwide Danish study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Kjeldsen
- Gentofte University Hospital, Cardiology, Gentofte, Denmark
| | - G Mohr
- Gentofte University Hospital, Cardiology, Gentofte, Denmark
| | - S Moeller
- Gentofte University Hospital, Cardiology, Gentofte, Denmark
| | - K Kragholm
- Aalborg University Hospital, Unit of Epidemiology and Biostatistics, Aalborg, Denmark
| | - M Wissenberg
- University of Copenhagen, Emergency Medical Services Copenhagen, Copenhagen, Denmark
| | - S Hansen
- Aalborg University Hospital, Unit of Epidemiology and Biostatistics, Aalborg, Denmark
| | - L Koeber
- Rigshospitalet - Copenhagen University Hospital, The Heart Center, Copenhagen, Denmark
| | - F Lippert
- University of Copenhagen, Emergency Medical Services Copenhagen, Copenhagen, Denmark
| | - F Folke
- University of Copenhagen, Emergency Medical Services Copenhagen, Copenhagen, Denmark
| | - C Andersson
- Gentofte University Hospital, Cardiology, Gentofte, Denmark
| | - G Gislason
- University of Copenhagen, Department of Clinical Medicine, Copenhagen, Denmark
| | - C Torp-Pedersen
- Aalborg University, Department of Health Science and Technology, Aalborg, Denmark
| | - P Weeke
- Gentofte University Hospital, Cardiology, Gentofte, Denmark
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17
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Corsuto L, Rother S, Koehler L, Bedini E, Moeller S, Schnabelrauch M, Hintze V, Schiraldi C, Scharnweber D. Sulfation degree not origin of chondroitin sulfate derivatives modulates keratinocyte response. Carbohydr Polym 2018; 191:53-64. [PMID: 29661321 DOI: 10.1016/j.carbpol.2018.02.072] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/25/2018] [Accepted: 02/22/2018] [Indexed: 12/30/2022]
Abstract
Chondroitin sulfate (CS) sulfation-dependently binds transforming growth factor-β1 (TGF-β1) and chronic wounds often accompany with epidermal hyperproliferation due to downregulated TGF-β signaling. However, the impact of CS on keratinocytes is unknown. Especially biotechnological-chemical strategies are promising to replace animal-derived CS. Thus, this study aims to evaluate the effects of CS derivatives on the interaction with vascular endothelial growth factor-A (VEGF-A) and on keratinocyte response. Over-sulfated CS (sCS3) interacts stronger with VEGF-A than CS. Furthermore, collagen coatings with CS variants are prepared by in vitro fibrillogenesis. Stability analyses demonstrate that collagen is firmly integrated, while the fibril diameters decrease with increasing sulfation degree. CS variants sulfation-dependently decelerate keratinocyte (HaCaT) migration and proliferation in a scratch assay. HaCaT cultured on sCS3-containing coatings produced increased amounts of solute active TGF-β1 which could be translated into biomaterials able to decrease epidermal hyperproliferation in chronic wounds. Overall, semi-synthetic and natural CS yield to comparable responses.
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Affiliation(s)
- Luisana Corsuto
- Department of Experimental Medicine, Section of Biotechnology, Second University of Naples, Italy
| | - Sandra Rother
- Technische Universitaet Dresden, Institute of Materials Science, Max Bergmann Center of Biomaterials, D-01069 Dresden, Germany
| | - Linda Koehler
- Technische Universitaet Dresden, Institute of Materials Science, Max Bergmann Center of Biomaterials, D-01069 Dresden, Germany
| | - Emiliano Bedini
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, via Cintia 4, I-80126 Napoli, Italy
| | | | | | - Vera Hintze
- Technische Universitaet Dresden, Institute of Materials Science, Max Bergmann Center of Biomaterials, D-01069 Dresden, Germany
| | - Chiara Schiraldi
- Department of Experimental Medicine, Section of Biotechnology, Second University of Naples, Italy.
| | - Dieter Scharnweber
- Technische Universitaet Dresden, Institute of Materials Science, Max Bergmann Center of Biomaterials, D-01069 Dresden, Germany.
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18
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Rother S, Galiazzo VD, Kilian D, Fiebig KM, Becher J, Moeller S, Hempel U, Schnabelrauch M, Waltenberger J, Scharnweber D, Hintze V. Macromol. Biosci. 11/2017. Macromol Biosci 2017. [DOI: 10.1002/mabi.201770044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sandra Rother
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Vanessa D. Galiazzo
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - David Kilian
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Karen M. Fiebig
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Jana Becher
- Biomaterials Department; INNOVENT e.V.; Prüssingstr. 27B 07745 Jena Germany
| | - Stephanie Moeller
- Biomaterials Department; INNOVENT e.V.; Prüssingstr. 27B 07745 Jena Germany
| | - Ute Hempel
- Institute of Physiological Chemistry; Carl Gustav Carus Faculty of Medicine; TU Dresden; Fiedlerstraße 42 01307 Dresden Germany
| | | | - Johannes Waltenberger
- Department of Cardiovascular Medicine; University of Münster; Albert-Schweitzer-Campus 1 48149 Münster Germany
| | - Dieter Scharnweber
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Vera Hintze
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
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19
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LaRue J, Krejčí O, Yu L, Beye M, Ng ML, Öberg H, Xin H, Mercurio G, Moeller S, Turner JJ, Nordlund D, Coffee R, Minitti MP, Wurth W, Pettersson LGM, Öström H, Nilsson A, Abild-Pedersen F, Ogasawara H. Real-Time Elucidation of Catalytic Pathways in CO Hydrogenation on Ru. J Phys Chem Lett 2017; 8:3820-3825. [PMID: 28759996 DOI: 10.1021/acs.jpclett.7b01549] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The direct elucidation of the reaction pathways in heterogeneous catalysis has been challenging due to the short-lived nature of reaction intermediates. Here, we directly measured on ultrafast time scales the initial hydrogenation steps of adsorbed CO on a Ru catalyst surface, which is known as the bottleneck reaction in syngas and CO2 reforming processes. We initiated the hydrogenation of CO with an ultrafast laser temperature jump and probed transient changes in the electronic structure using real-time X-ray spectroscopy. In combination with theoretical simulations, we verified the formation of CHO during CO hydrogenation.
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Affiliation(s)
- J LaRue
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
- Department of Physics, AlbaNova University Center, Stockholm University , SE-10691 Stockholm, Sweden
- Schmid College of Science and Technology, Chapman University , One University Drive, Orange, California 92866, United States
- Fritz-Haber Institute of the Max-Planck-Society , Faradayweg 4-6, D-14195 Berlin, Germany
| | - O Krejčí
- Department of Physics, AlbaNova University Center, Stockholm University , SE-10691 Stockholm, Sweden
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University in Prague , V Holešovičkách 2, 180 00, Prague, Czech Republic
- Institute of Physics of the Czech Academy of Sciences , Cukrovarnická 10, 162 53, Prague, Czech Republic
| | - L Yu
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University , Stanford, California 95305, United States
| | - M Beye
- Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - M L Ng
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - H Öberg
- Department of Physics, AlbaNova University Center, Stockholm University , SE-10691 Stockholm, Sweden
| | - H Xin
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University , Stanford, California 95305, United States
| | - G Mercurio
- University of Hamburg and Center for Free Electron Laser Science , Luruper Chausse 149, D-22761 Hamburg, Germany
| | - S Moeller
- Linac Coherent Light Source, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - J J Turner
- Linac Coherent Light Source, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - D Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - R Coffee
- Linac Coherent Light Source, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - M P Minitti
- Linac Coherent Light Source, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - W Wurth
- University of Hamburg and Center for Free Electron Laser Science , Luruper Chausse 149, D-22761 Hamburg, Germany
- DESY Photon Science , Notkestrasse 85, 22607 Hamburg, Germany
| | - L G M Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University , SE-10691 Stockholm, Sweden
| | - H Öström
- Department of Physics, AlbaNova University Center, Stockholm University , SE-10691 Stockholm, Sweden
| | - A Nilsson
- Department of Physics, AlbaNova University Center, Stockholm University , SE-10691 Stockholm, Sweden
| | - F Abild-Pedersen
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - H Ogasawara
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , 2575 Sand Hill Road, Menlo Park, California 94025, United States
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20
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Seaberg MH, Holladay B, Lee JCT, Sikorski M, Reid AH, Montoya SA, Dakovski GL, Koralek JD, Coslovich G, Moeller S, Schlotter WF, Streubel R, Kevan SD, Fischer P, Fullerton EE, Turner JL, Decker FJ, Sinha SK, Roy S, Turner JJ. Nanosecond X-Ray Photon Correlation Spectroscopy on Magnetic Skyrmions. Phys Rev Lett 2017; 119:067403. [PMID: 28949638 DOI: 10.1103/physrevlett.119.067403] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Indexed: 06/07/2023]
Abstract
We report an x-ray photon correlation spectroscopy method that exploits the recent development of the two-pulse mode at the Linac Coherent Light Source. By using coherent resonant x-ray magnetic scattering, we studied spontaneous fluctuations on nanosecond time scales in thin films of multilayered Fe/Gd that exhibit ordered stripe and Skyrmion lattice phases. The correlation time of the fluctuations was found to differ between the Skyrmion phase and near the stripe-Skyrmion boundary. This technique will enable a significant new area of research on the study of equilibrium fluctuations in condensed matter.
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Affiliation(s)
- M H Seaberg
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - B Holladay
- Department of Physics, University of California-San Diego, La Jolla, California 92093, USA
| | - J C T Lee
- Department of Physics, University of Oregon, Eugene, Oregon 97401, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M Sikorski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - A H Reid
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S A Montoya
- Center for Memory and Recording Research, University of California-San Diego, La Jolla, California 92093, USA
- Department of Electrical and Computer Engineering, University of California-San Diego, La Jolla, California 92093, USA
| | - G L Dakovski
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - J D Koralek
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - G Coslovich
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S Moeller
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - W F Schlotter
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - R Streubel
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S D Kevan
- Department of Physics, University of Oregon, Eugene, Oregon 97401, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P Fischer
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - E E Fullerton
- Center for Memory and Recording Research, University of California-San Diego, La Jolla, California 92093, USA
- Department of Electrical and Computer Engineering, University of California-San Diego, La Jolla, California 92093, USA
| | - J L Turner
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - F-J Decker
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S K Sinha
- Department of Physics, University of California-San Diego, La Jolla, California 92093, USA
| | - S Roy
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J J Turner
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
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21
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Bhowmick S, Rother S, Zimmermann H, Lee PS, Moeller S, Schnabelrauch M, Koul V, Scharnweber D. Reciprocal influence of hMSCs/HaCaT cultivated on electrospun scaffolds. J Mater Sci Mater Med 2017; 28:128. [PMID: 28721664 DOI: 10.1007/s10856-017-5941-4] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Here, we investigated the synergistic effect of electrospun nanofibrous scaffolds made of gelatin /sulfated hyaluronan (sHA) or native hyaluronan (HA)/chondroitin sulfate (CS) and, keratinocytes (HaCaT)-human mesenchymal stem cells (hMSCs) contact co-culture on epithelial differentiation of hMSCs. The hMSCs were co-cultured in contact with HaCaT cells for 5 days on electrospun scaffold. Results show that electrospun scaffolds containing sulfated glycosaminoglycans (GAGs) stimulate epithelial differentiation in terms of various protein expression markers (keratin 14, ΔNp63α and Pan-cytokeratin) and gene expression of several dermal proteins (keratin 14, ΔNp63α). Electrospun scaffold independent of GAGs alone did not affect the epithelial differentiation of hMSCs but combination of keratinocyte-hMSC contact co-culture and electrospun scaffold promotes the epithelial differentiation of hMSCs.
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Affiliation(s)
- Sirsendu Bhowmick
- Department of Chemistry, University at Albany, State University of New York, Albany, NY, 12222, USA.
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany.
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Sandra Rother
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Heike Zimmermann
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Poh S Lee
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V., Prüssingstraße 27B, 07745, Jena, Germany
| | | | - Veena Koul
- Centre for Biomedical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Dieter Scharnweber
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069, Dresden, Germany.
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22
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Rother S, Galiazzo VD, Kilian D, Fiebig KM, Becher J, Moeller S, Hempel U, Schnabelrauch M, Waltenberger J, Scharnweber D, Hintze V. Hyaluronan/Collagen Hydrogels with Sulfated Hyaluronan for Improved Repair of Vascularized Tissue Tune the Binding of Proteins and Promote Endothelial Cell Growth. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201700154] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 05/29/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Sandra Rother
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Vanessa D. Galiazzo
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - David Kilian
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Karen M. Fiebig
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Jana Becher
- Biomaterials Department; INNOVENT e.V.; Prüssingstr. 27B 07745 Jena Germany
| | - Stephanie Moeller
- Biomaterials Department; INNOVENT e.V.; Prüssingstr. 27B 07745 Jena Germany
| | - Ute Hempel
- Institute of Physiological Chemistry; Carl Gustav Carus Faculty of Medicine; TU Dresden; Fiedlerstraße 42 01307 Dresden Germany
| | | | - Johannes Waltenberger
- Department of Cardiovascular Medicine; University of Münster; Albert-Schweitzer-Campus 1 48149 Münster Germany
| | - Dieter Scharnweber
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
| | - Vera Hintze
- Institute of Materials Science; Max Bergmann Center of Biomaterials; TU Dresden, Budapester Str. 27 01069 Dresden Germany
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23
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Koehler L, Samsonov S, Rother S, Vogel S, Köhling S, Moeller S, Schnabelrauch M, Rademann J, Hempel U, Pisabarro MT, Scharnweber D, Hintze V. Sulfated Hyaluronan Derivatives Modulate TGF-β1:Receptor Complex Formation: Possible Consequences for TGF-β1 Signaling. Sci Rep 2017; 7:1210. [PMID: 28446792 PMCID: PMC5430790 DOI: 10.1038/s41598-017-01264-8] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 03/24/2017] [Indexed: 12/15/2022] Open
Abstract
Glycosaminoglycans are known to bind biological mediators thereby modulating their biological activity. Sulfated hyaluronans (sHA) were reported to strongly interact with transforming growth factor (TGF)-β1 leading to impaired bioactivity in fibroblasts. The underlying mechanism is not fully elucidated yet. Examining the interaction of all components of the TGF-β1:receptor complex with sHA by surface plasmon resonance, we could show that highly sulfated HA (sHA3) blocks binding of TGF-β1 to its TGF-β receptor-I (TβR-I) and -II (TβR-II). However, sequential addition of sHA3 to the TβR-II/TGF-β1 complex led to a significantly stronger recruitment of TβR-I compared to a complex lacking sHA3, indicating that the order of binding events is very important. Molecular modeling suggested a possible molecular mechanism in which sHA3 could potentially favor the association of TβR-I when added sequentially. For the first time bioactivity of TGF-β1 in conjunction with sHA was investigated at the receptor level. TβR-I and, furthermore, Smad2 phosphorylation were decreased in the presence of sHA3 indicating the formation of an inactive signaling complex. The results contribute to an improved understanding of the interference of sHA3 with TGF-β1:receptor complex formation and will help to further improve the design of functional biomaterials that interfere with TGF-β1-driven skin fibrosis.
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Affiliation(s)
- Linda Koehler
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Sergey Samsonov
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg 47-51, 01307, Dresden, Germany
| | - Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Sarah Vogel
- Medical Department, Institute of Physiological Chemistry, TU Dresden, Fiedlerstraße 42, 01307, Dresden, Germany
| | - Sebastian Köhling
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2+4, 14195, Berlin, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V., Prüssingstraße 27 B, 07745, Jena, Germany
| | | | - Jörg Rademann
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2+4, 14195, Berlin, Germany
| | - Ute Hempel
- Medical Department, Institute of Physiological Chemistry, TU Dresden, Fiedlerstraße 42, 01307, Dresden, Germany
| | - M Teresa Pisabarro
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg 47-51, 01307, Dresden, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, 01069, Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, 01069, Dresden, Germany.
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24
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Friedemann M, Kalbitzer L, Franz S, Moeller S, Schnabelrauch M, Simon JC, Pompe T, Franke K. Instructing Human Macrophage Polarization by Stiffness and Glycosaminoglycan Functionalization in 3D Collagen Networks. Adv Healthc Mater 2017; 6. [PMID: 28135049 DOI: 10.1002/adhm.201600967] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/01/2016] [Indexed: 12/21/2022]
Abstract
Dynamic alterations of composition and mechanics of the extracellular matrix are suggested to modulate cellular behavior including plasticity of macrophages (MPhs) during wound healing. In this study, engineered 3D fibrillar matrices based on naturally occurring biopolymers (collagen I, glycosaminoglycans (GAGs)) are used to mimic matrix stiffening as well as modification by sulfated and nonsulfated GAGs at different stages of wound healing. Human MPhs are found to sensitively respond to these microenvironmental cues in terms of polarization toward proinflammatory or wound healing phenotypes over 6 days in vitro. MPhs exhibit a wound healing phenotype in stiffer matrices as determined by protein and gene expression of relevant cytokines (IL10, IL12, and TNFα). Presence of sulfated and nonsulfated GAGs inhibits this polarization effect. Furthermore, control experiments on 2D matrices stress the relevance of using stiffness-controlled 3D matrices, as MPhs show a reciprocal polarization behavior depending on GAG presence. Hence, the results indicate a strong influence of dimensionality, stiffness, and GAG presence of the biomaterial scaffold on MPh polarization and emphasize the need for matrices closely mimicking the 3D in vivo context with a variable stiffness and GAG composition in in vitro studies.
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Affiliation(s)
- Markus Friedemann
- Institute of Biochemistry; Universität Leipzig; 04103 Leipzig Germany
| | - Liv Kalbitzer
- Institute of Biochemistry; Universität Leipzig; 04103 Leipzig Germany
| | - Sandra Franz
- Department of Dermatology; Venerology and Allergology; Universitätsklinikum Leipzig; 04103 Leipzig Germany
| | | | | | - Jan-Christoph Simon
- Department of Dermatology; Venerology and Allergology; Universitätsklinikum Leipzig; 04103 Leipzig Germany
| | - Tilo Pompe
- Institute of Biochemistry; Universität Leipzig; 04103 Leipzig Germany
| | - Katja Franke
- Institute of Biochemistry; Universität Leipzig; 04103 Leipzig Germany
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25
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Rother S, Samsonov SA, Moeller S, Schnabelrauch M, Rademann J, Blaszkiewicz J, Köhling S, Waltenberger J, Pisabarro MT, Scharnweber D, Hintze V. Sulfated Hyaluronan Alters Endothelial Cell Activation in Vitro by Controlling the Biological Activity of the Angiogenic Factors Vascular Endothelial Growth Factor-A and Tissue Inhibitor of Metalloproteinase-3. ACS Appl Mater Interfaces 2017; 9:9539-9550. [PMID: 28248081 DOI: 10.1021/acsami.7b01300] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Several pathologic conditions such as rheumatoid arthritis, ocular neovascularization, cancer, or atherosclerosis are often associated with abnormal angiogenesis, which requires innovative biomaterial-based treatment options to control the activity of angiogenic factors. Here, we studied how sulfated hyaluronan (sHA) and oversulfated chondroitin sulfate derivatives as potential components of functional biomaterials modulate vascular endothelial growth factor-A (VEGF-A) signaling and endothelial cell activity in vitro. Tissue inhibitor of metalloproteinase-3 (TIMP-3), an effective angiogenesis inhibitor, exerts its activity by competing with VEGF-A for binding to VEGF receptor-2 (VEGFR-2). However, even though TIMP-3 and VEGF-A are known to interact with glycosaminoglycans (GAGs), the potential role and mechanism by which GAGs alter the VEGF-A/TIMP-3 regulated VEGFR-2 signaling remains unclear. Combining surface plasmon resonance, immunobiochemical analysis, and molecular modeling, we demonstrate the simultaneous binding of VEGF-A and TIMP-3 to sHA-coated surfaces and identified a novel mechanism by which sulfated GAG derivatives control angiogenesis: GAG derivatives block the binding of VEGF-A and TIMP-3 to VEGFR-2 thereby reducing their biological activity in a defined, sulfation-dependent manner. This effect was stronger for sulfated GAG derivatives than for native GAGs. The simultaneous formation of TIMP-3/sHA complexes partially rescues the sHA inhibited VEGF-A/VEGFR-2 signaling and endothelial cell activation. These results provide novel insights into the regulation of angiogenic factors by GAG derivatives and highlight the potential of sHA derivatives for the treatment of diseases associated with increased VEGF-A and VEGFR-2 levels.
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Affiliation(s)
- Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , 01069 Dresden, Germany
| | - Sergey A Samsonov
- Structural Bioinformatics, BIOTEC Technische Universität Dresden , Tatzberg 47-51, 01307 Dresden, Germany
| | | | | | - Jörg Rademann
- Institute of Pharmacy & Institute of Chemistry and Biochemistry, Freie Universität Berlin , Königin-Luise-Strasse 2, 14195 Berlin, Germany
- Institute of Medical Physics and Biophysics, Universität Leipzig , Härtelstrasse 16/18, 04107 Leipzig, Germany
| | - Joanna Blaszkiewicz
- Institute of Pharmacy & Institute of Chemistry and Biochemistry, Freie Universität Berlin , Königin-Luise-Strasse 2, 14195 Berlin, Germany
- Institute of Medical Physics and Biophysics, Universität Leipzig , Härtelstrasse 16/18, 04107 Leipzig, Germany
| | - Sebastian Köhling
- Institute of Pharmacy & Institute of Chemistry and Biochemistry, Freie Universität Berlin , Königin-Luise-Strasse 2, 14195 Berlin, Germany
- Institute of Medical Physics and Biophysics, Universität Leipzig , Härtelstrasse 16/18, 04107 Leipzig, Germany
| | - Johannes Waltenberger
- Department of Cardiovascular Medicine, University of Münster , Albert-Schweitzer-Campus 1, 48149 Münster, Germany
| | - M Teresa Pisabarro
- Structural Bioinformatics, BIOTEC Technische Universität Dresden , Tatzberg 47-51, 01307 Dresden, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , 01069 Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , 01069 Dresden, Germany
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26
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Rother S, Samsonov SA, Hempel U, Vogel S, Moeller S, Blaszkiewicz J, Köhling S, Schnabelrauch M, Rademann J, Pisabarro MT, Hintze V, Scharnweber D. Sulfated Hyaluronan Alters the Interaction Profile of TIMP-3 with the Endocytic Receptor LRP-1 Clusters II and IV and Increases the Extracellular TIMP-3 Level of Human Bone Marrow Stromal Cells. Biomacromolecules 2016; 17:3252-3261. [DOI: 10.1021/acs.biomac.6b00980] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Sandra Rother
- Institute
of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Sergey A. Samsonov
- Structural
Bioinformatics, BIOTEC TU Dresden, Tatzberg 47-51, 01307 Dresden, Germany
| | - Ute Hempel
- Institute
of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, TU Dresden, Fiedlerstraße 42, 01307 Dresden, Germany
| | - Sarah Vogel
- Institute
of Physiological Chemistry, Carl Gustav Carus Faculty of Medicine, TU Dresden, Fiedlerstraße 42, 01307 Dresden, Germany
| | - Stephanie Moeller
- Biomaterials
Department, INNOVENT e.V., Prüssingstraße 27 B, 07745 Jena, Germany
| | - Joanna Blaszkiewicz
- Institute of Pharmacy & Institute of Chemistry and Biochemistry, Freie Universität Berlin, Königin-Luise-Str. 2, 14195 Berlin, Germany
- Institute
of Medical Physics and Biophysics, Universität Leipzig, Härtelstr.
16/18, 04107 Leipzig, Germany
| | - Sebastian Köhling
- Institute of Pharmacy & Institute of Chemistry and Biochemistry, Freie Universität Berlin, Königin-Luise-Str. 2, 14195 Berlin, Germany
- Institute
of Medical Physics and Biophysics, Universität Leipzig, Härtelstr.
16/18, 04107 Leipzig, Germany
| | | | - Jörg Rademann
- Institute of Pharmacy & Institute of Chemistry and Biochemistry, Freie Universität Berlin, Königin-Luise-Str. 2, 14195 Berlin, Germany
- Institute
of Medical Physics and Biophysics, Universität Leipzig, Härtelstr.
16/18, 04107 Leipzig, Germany
| | - M. Teresa Pisabarro
- Structural
Bioinformatics, BIOTEC TU Dresden, Tatzberg 47-51, 01307 Dresden, Germany
| | - Vera Hintze
- Institute
of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Dieter Scharnweber
- Institute
of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
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27
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Hartmann G, Lindahl AO, Knie A, Hartmann N, Lutman AA, MacArthur JP, Shevchuk I, Buck J, Galler A, Glownia JM, Helml W, Huang Z, Kabachnik NM, Kazansky AK, Liu J, Marinelli A, Mazza T, Nuhn HD, Walter P, Viefhaus J, Meyer M, Moeller S, Coffee RN, Ilchen M. Circular dichroism measurements at an x-ray free-electron laser with polarization control. Rev Sci Instrum 2016; 87:083113. [PMID: 27587106 DOI: 10.1063/1.4961470] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 08/04/2016] [Indexed: 05/24/2023]
Abstract
A non-destructive diagnostic method for the characterization of circularly polarized, ultraintense, short wavelength free-electron laser (FEL) light is presented. The recently installed Delta undulator at the LCLS (Linac Coherent Light Source) at SLAC National Accelerator Laboratory (USA) was used as showcase for this diagnostic scheme. By applying a combined two-color, multi-photon experiment with polarization control, the degree of circular polarization of the Delta undulator has been determined. Towards this goal, an oriented electronic state in the continuum was created by non-resonant ionization of the O2 1s core shell with circularly polarized FEL pulses at hν ≃ 700 eV. An also circularly polarized, highly intense UV laser pulse with hν ≃ 3.1 eV was temporally and spatially overlapped, causing the photoelectrons to redistribute into so-called sidebands that are energetically separated by the photon energy of the UV laser. By determining the circular dichroism of these redistributed electrons using angle resolving electron spectroscopy and modeling the results with the strong-field approximation, this scheme allows to unambiguously determine the absolute degree of circular polarization of any pulsed, ultraintense XUV or X-ray laser source.
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Affiliation(s)
- G Hartmann
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - A O Lindahl
- PULSE at Stanford, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Knie
- Institut für Physik, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - N Hartmann
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A A Lutman
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J P MacArthur
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - I Shevchuk
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - J Buck
- European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | - A Galler
- European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | - J M Glownia
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - W Helml
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Z Huang
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - N M Kabachnik
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991, Russia
| | - A K Kazansky
- Departamento de Fisica de Materiales, UPV/EHU, Donostia International Physics Center (DIPC), E-20018 San Sebastian/Donostia, Spain
| | - J Liu
- European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | - A Marinelli
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - T Mazza
- European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | - H-D Nuhn
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P Walter
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - J Viefhaus
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - M Meyer
- European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | - S Moeller
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R N Coffee
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Ilchen
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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28
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Schmidt JR, Kliemt S, Preissler C, Moeller S, von Bergen M, Hempel U, Kalkhof S. Osteoblast-released Matrix Vesicles, Regulation of Activity and Composition by Sulfated and Non-sulfated Glycosaminoglycans. Mol Cell Proteomics 2015; 15:558-72. [PMID: 26598647 DOI: 10.1074/mcp.m115.049718] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Indexed: 01/01/2023] Open
Abstract
Our aging population has to deal with the increasing threat of age-related diseases that impair bone healing. One promising therapeutic approach involves the coating of implants with modified glycosaminoglycans (GAGs) that mimic the native bone environment and actively facilitate skeletogenesis. In previous studies, we reported that coatings containing GAGs, such as hyaluronic acid (HA) and its synthetically sulfated derivative (sHA1) as well as the naturally low-sulfated GAG chondroitin sulfate (CS1), reduce the activity of bone-resorbing osteoclasts, but they also induce functions of the bone-forming cells, the osteoblasts. However, it remained open whether GAGs influence the osteoblasts alone or whether they also directly affect the formation, composition, activity, and distribution of osteoblast-released matrix vesicles (MV), which are supposed to be the active machinery for bone formation. Here, we studied the molecular effects of sHA1, HA, and CS1 on MV activity and on the distribution of marker proteins. Furthermore, we used comparative proteomic methods to study the relative protein compositions of isolated MVs and MV-releasing osteoblasts. The MV proteome is much more strongly regulated by GAGs than the cellular proteome. GAGs, especially sHA1, were found to severely impact vesicle-extracellular matrix interaction and matrix vesicle activity, leading to stronger extracellular matrix formation and mineralization. This study shows that the regulation of MV activity is one important mode of action of GAGs and provides information on underlying molecular mechanisms.
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Affiliation(s)
- Johannes R Schmidt
- From the ‡Department of Proteomics, Helmholtz Centre for Environmental Research UFZ, 04318 Leipzig, Germany
| | - Stefanie Kliemt
- From the ‡Department of Proteomics, Helmholtz Centre for Environmental Research UFZ, 04318 Leipzig, Germany
| | - Carolin Preissler
- the ‖Institute of Physiological Chemistry, TU Dresden, 01307 Dresden, Germany
| | | | - Martin von Bergen
- From the ‡Department of Proteomics, Helmholtz Centre for Environmental Research UFZ, 04318 Leipzig, Germany; the ‡‡Department of Metabolomics, Helmholtz Centre for Environmental Research UFZ, 04318 Leipzig, Germany; §§Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark
| | - Ute Hempel
- the ‖Institute of Physiological Chemistry, TU Dresden, 01307 Dresden, Germany;
| | - Stefan Kalkhof
- From the ‡Department of Proteomics, Helmholtz Centre for Environmental Research UFZ, 04318 Leipzig, Germany; the ¶¶Department of Bioanalytics, University of Applied Sciences and Arts of Coburg, 96450 Coburg, Germany
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29
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Wang R, Intravooth T, Moeller S, Koehn J, Liu M, Canavese F, Aurnhammer F, Marthol H, Hilz M. Eyeball pressure stimulation causes paradox sympathetic activation in moderate-severe post traumatic brain injury patients. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.441] [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: 11/26/2022]
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30
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Moeller S, Buechner S, Czarkowska H, Koehn J, Ayappa I, Axelrod F, Rapoport D, Hilz M. Reduced Arousability during sleep in patients with Familial Dysautonomia. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.206] [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: 11/30/2022]
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31
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Rother S, Salbach-Hirsch J, Moeller S, Seemann T, Schnabelrauch M, Hofbauer LC, Hintze V, Scharnweber D. Bioinspired Collagen/Glycosaminoglycan-Based Cellular Microenvironments for Tuning Osteoclastogenesis. ACS Appl Mater Interfaces 2015; 7:23787-23797. [PMID: 26452150 DOI: 10.1021/acsami.5b08419] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Replicating the biocomplexity of native extracellular matrices (ECM) is critical for a deeper understanding of biochemical signals influencing bone homeostasis. This will foster the development of bioinspired biomaterials with adjustable bone-inducing properties. Collagen-based coatings containing single HA derivatives have previously been reported to promote osteogenic differentiation and modulate osteoclastogenesis and resorption depending on their sulfation degree. However, the potential impact of different GAG concentrations as well as the interplay of multiple GAGs in these coatings is not characterized in detail to date. These aspects were addressed in the current study by integrating HA and different sulfate-modified HA derivatives (sHA) during collagen in vitro fibrillogenesis. Besides cellular microenvironments with systematically altered single-GAG concentrations, matrices containing both low and high sHA (sHA1, sHA4) were characterized by biochemical analysis such as agarose gel electrophoresis, performed for the first time with sHA derivatives. The morphology and composition of the collagen coatings were altered in a GAG sulfation- and concentration-dependent manner. In multi-GAG microenvironments, atomic force microscopy revealed intermediate collagen fibril structures with thin fibrils and microfibrils. GAG sulfation altered the surface charge of the coatings as demonstrated by ζ-potential measurements revealed for the first time as well. This highlights the prospect of GAG-containing matrices to adjust defined surface charge properties. The sHA4- and the multi-GAG coatings alike significantly enhanced the viability of murine osteoclast-precursor-like RAW264.7 cells. Although in single-GAG matrices there was no dose-dependent effect on cell viability, osteoclastogenesis was significantly suppressed only on sHA4-coatings in a dose-dependent fashion. The multi-GAG coatings led to an antiosteoclastogenic effect in-between those with single-GAGs which cannot simply be attributed to the overall content of sulfate groups. These data suggest that the interplay of sGAGs influences bone cell behavior. Whether these findings translate into favorable biomaterial properties needs to be validated in vivo.
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Affiliation(s)
- Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , Budapester Straße 27, 01069 Dresden, Germany
| | - Juliane Salbach-Hirsch
- Division of Endocrinology, Diabetes, and Bone Diseases of Medicine III, Technische Universität Dresden Medical Center , Fetscherstraße 74, 01307 Dresden, Germany
| | - Stephanie Moeller
- Biomaterials Department, INNOVENT e.V. , Prüssingstraße 27 B, 07745 Jena, Germany
| | - Thomas Seemann
- Biomaterials Department, INNOVENT e.V. , Prüssingstraße 27 B, 07745 Jena, Germany
| | | | - Lorenz C Hofbauer
- Division of Endocrinology, Diabetes, and Bone Diseases of Medicine III, Technische Universität Dresden Medical Center , Fetscherstraße 74, 01307 Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , Budapester Straße 27, 01069 Dresden, Germany
| | - Dieter Scharnweber
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden , Budapester Straße 27, 01069 Dresden, Germany
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32
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Salbach-Hirsch J, Samsonov SA, Hintze V, Hofbauer C, Picke AK, Rauner M, Gehrcke JP, Moeller S, Schnabelrauch M, Scharnweber D, Pisabarro MT, Hofbauer LC. Structural and functional insights into sclerostin-glycosaminoglycan interactions in bone. Biomaterials 2015; 67:335-45. [DOI: 10.1016/j.biomaterials.2015.07.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 07/11/2015] [Indexed: 01/07/2023]
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33
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Vu AT, Auerbach E, Lenglet C, Moeller S, Sotiropoulos SN, Jbabdi S, Andersson J, Yacoub E, Ugurbil K. High resolution whole brain diffusion imaging at 7T for the Human Connectome Project. Neuroimage 2015; 122:318-31. [PMID: 26260428 DOI: 10.1016/j.neuroimage.2015.08.004] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 07/31/2015] [Accepted: 08/01/2015] [Indexed: 11/16/2022] Open
Abstract
Mapping structural connectivity in healthy adults for the Human Connectome Project (HCP) benefits from high quality, high resolution, multiband (MB)-accelerated whole brain diffusion MRI (dMRI). Acquiring such data at ultrahigh fields (7T and above) can improve intrinsic signal-to-noise ratio (SNR), but suffers from shorter T2 and T2(⁎) relaxation times, increased B1(+) inhomogeneity (resulting in signal loss in cerebellar and temporal lobe regions), and increased power deposition (i.e. specific absorption rate (SAR)), thereby limiting our ability to reduce the repetition time (TR). Here, we present recent developments and optimizations in 7T image acquisitions for the HCP that allow us to efficiently obtain high quality, high resolution whole brain in-vivo dMRI data at 7T. These data show spatial details typically seen only in ex-vivo studies and complement already very high quality 3T HCP data in the same subjects. The advances are the result of intensive pilot studies aimed at mitigating the limitations of dMRI at 7T. The data quality and methods described here are representative of the datasets that will be made freely available to the community in 2015.
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Affiliation(s)
- A T Vu
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN 55455, USA.
| | - E Auerbach
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN 55455, USA
| | - C Lenglet
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN 55455, USA
| | - S Moeller
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN 55455, USA
| | - S N Sotiropoulos
- Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB), University of Oxford, UK
| | - S Jbabdi
- Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB), University of Oxford, UK
| | - J Andersson
- Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB), University of Oxford, UK
| | - E Yacoub
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN 55455, USA
| | - K Ugurbil
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN 55455, USA
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34
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Altgärde N, Eriksson C, Peerboom N, Phan-Xuan T, Moeller S, Schnabelrauch M, Svedhem S, Trybala E, Bergström T, Bally M. Mucin-like Region of Herpes Simplex Virus Type 1 Attachment Protein Glycoprotein C (gC) Modulates the Virus-Glycosaminoglycan Interaction. J Biol Chem 2015; 290:21473-85. [PMID: 26160171 DOI: 10.1074/jbc.m115.637363] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 02/11/2015] [Indexed: 01/09/2023] Open
Abstract
Glycoprotein C (gC) mediates the attachment of HSV-1 to susceptible host cells by interacting with glycosaminoglycans (GAGs) on the cell surface. gC contains a mucin-like region located near the GAG-binding site, which may affect the binding activity. Here, we address this issue by studying a HSV-1 mutant lacking the mucin-like domain in gC and the corresponding purified mutant protein (gCΔmuc) in cell culture and GAG-binding assays, respectively. The mutant virus exhibited two functional alterations as compared with native HSV-1 (i.e. decreased sensitivity to GAG-based inhibitors of virus attachment to cells and reduced release of viral particles from the surface of infected cells). Kinetic and equilibrium binding characteristics of purified gC were assessed using surface plasmon resonance-based sensing together with a surface platform consisting of end-on immobilized GAGs. Both native gC and gCΔmuc bound via the expected binding region to chondroitin sulfate and sulfated hyaluronan but not to the non-sulfated hyaluronan, confirming binding specificity. In contrast to native gC, gCΔmuc exhibited a decreased affinity for GAGs and a slower dissociation, indicating that once formed, the gCΔmuc-GAG complex is more stable. It was also found that a larger number of gCΔmuc bound to a single GAG chain, compared with native gC. Taken together, our data suggest that the mucin-like region of HSV-1 gC is involved in the modulation of the GAG-binding activity, a feature of importance both for unrestricted virus entry into the cells and release of newly produced viral particles from infected cells.
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Affiliation(s)
- Noomi Altgärde
- From the Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Charlotta Eriksson
- the Department of Clinical Virology, University of Gothenburg, 413 46 Göteborg, Sweden
| | - Nadia Peerboom
- From the Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Tuan Phan-Xuan
- From the Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Stephanie Moeller
- the Department of Biomaterials, INNOVENT e.V., Pruessingstrasse 27 B, D-07745 Jena, Germany, and
| | - Matthias Schnabelrauch
- the Department of Biomaterials, INNOVENT e.V., Pruessingstrasse 27 B, D-07745 Jena, Germany, and
| | - Sofia Svedhem
- From the Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Edward Trybala
- the Department of Clinical Virology, University of Gothenburg, 413 46 Göteborg, Sweden
| | - Tomas Bergström
- the Department of Clinical Virology, University of Gothenburg, 413 46 Göteborg, Sweden
| | - Marta Bally
- From the Department of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden, the Institut Curie, Centre de Recherche, CNRS, UMR 168, Physico-Chimie Curie, F-75248 Paris, France
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35
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Ratner D, Abela R, Amann J, Behrens C, Bohler D, Bouchard G, Bostedt C, Boyes M, Chow K, Cocco D, Decker FJ, Ding Y, Eckman C, Emma P, Fairley D, Feng Y, Field C, Flechsig U, Gassner G, Hastings J, Heimann P, Huang Z, Kelez N, Krzywinski J, Loos H, Lutman A, Marinelli A, Marcus G, Maxwell T, Montanez P, Moeller S, Morton D, Nuhn HD, Rodes N, Schlotter W, Serkez S, Stevens T, Turner J, Walz D, Welch J, Wu J. Experimental demonstration of a soft x-ray self-seeded free-electron laser. Phys Rev Lett 2015; 114:054801. [PMID: 25699448 DOI: 10.1103/physrevlett.114.054801] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Indexed: 05/19/2023]
Abstract
The Linac Coherent Light Source has added a self-seeding capability to the soft x-ray range using a grating monochromator system. We report the demonstration of soft x-ray self-seeding with a measured resolving power of 2000-5000, wavelength stability of 10(-4), and an increase in peak brightness by a factor of 2-5 across the photon energy range of 500-1000 eV. By avoiding the need for a monochromator at the experimental station, the self-seeded beam can deliver as much as 50-fold higher brightness to users.
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Affiliation(s)
- D Ratner
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - R Abela
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - J Amann
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - C Behrens
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - D Bohler
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - G Bouchard
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - C Bostedt
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - M Boyes
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - K Chow
- Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Road, Berkeley, California 94720, USA
| | - D Cocco
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - F J Decker
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - Y Ding
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - C Eckman
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - P Emma
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - D Fairley
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - Y Feng
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - C Field
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - U Flechsig
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - G Gassner
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - J Hastings
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - P Heimann
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - Z Huang
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - N Kelez
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - J Krzywinski
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - H Loos
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - A Lutman
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - A Marinelli
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - G Marcus
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - T Maxwell
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - P Montanez
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S Moeller
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - D Morton
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - H D Nuhn
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - N Rodes
- Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Road, Berkeley, California 94720, USA
| | - W Schlotter
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - S Serkez
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - T Stevens
- Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Road, Berkeley, California 94720, USA
| | - J Turner
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - D Walz
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - J Welch
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
| | - J Wu
- SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA
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Chen L, T Vu A, Xu J, Moeller S, Ugurbil K, Yacoub E, Feinberg DA. Evaluation of highly accelerated simultaneous multi-slice EPI for fMRI. Neuroimage 2015; 104:452-9. [PMID: 25462696 PMCID: PMC4467797 DOI: 10.1016/j.neuroimage.2014.10.027] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 09/19/2014] [Accepted: 10/12/2014] [Indexed: 11/24/2022] Open
Abstract
Echo planar imaging (EPI) is the MRI technique that is most widely used for blood oxygen level-dependent (BOLD) functional MRI (fMRI). Recent advances in EPI speed have been made possible with simultaneous multi-slice (SMS) methods which combine acceleration factors M from multiband (MB) radiofrequency pulses and S from simultaneous image refocusing (SIR) to acquire a total of N=S×M images in one echo train, providing up to N times speed-up in total acquisition time over conventional EPI. We evaluated accelerations as high as N=48 using different combinations of S and M which allow for whole brain imaging in as little as 100ms at 3T with a 32 channel head coil. The various combinations of acceleration parameters were evaluated by tSNR as well as BOLD contrast-to-noise ratio (CNR) and information content from checkerboard and movie clips in fMRI experiments. We found that at low acceleration factors (N≤6), setting S=1 and varying M alone yielded the best results in all evaluation metrics, while at acceleration N=8 the results were mixed using both S=1 and S=2 sequences. At higher acceleration factors (N>8), using S=2 yielded maximal BOLD CNR and information content as measured by classification of movie clip frames. Importantly, we found significantly greater BOLD information content using relatively fast TRs in the range of 300ms-600ms compared to a TR of 2s, suggesting that faster TRs capture more information per unit time in task based fMRI.
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Affiliation(s)
- L Chen
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA
| | - A T Vu
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA
| | - J Xu
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA
| | - S Moeller
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA
| | - K Ugurbil
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA
| | - E Yacoub
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA
| | - D A Feinberg
- University of California, Berkeley, USA; Advanced MRI Technologies, Sebastopol, CA, USA; CMRR, University of Minnesota, Minneapolis, MN, USA.
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Salbach-Hirsch J, Ziegler N, Thiele S, Moeller S, Schnabelrauch M, Hintze V, Scharnweber D, Rauner M, Hofbauer LC. Sulfated glycosaminoglycans support osteoblast functions and concurrently suppress osteoclasts. J Cell Biochem 2014; 115:1101-11. [PMID: 24356935 DOI: 10.1002/jcb.24750] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [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: 11/01/2013] [Accepted: 12/12/2013] [Indexed: 12/11/2022]
Abstract
In order to improve bone regeneration, development and evaluation of new adaptive biomaterials is warranted. Glycosaminoglycans (GAGs) such as hyaluronan (HA) and chondroitin sulfate (CS) are major extracellular matrix (ECM) components of bone, and display osteogenic properties that are potentially useful for biomaterial applications. Using native and synthetic sulfate-modified GAGs, we manufactured artificial collagen/GAG ECM (aECMs) coatings, and evaluated how the presence of GAGs and their degree of sulfation affects the differentiation of murine mesenchymal stem cells to osteoblasts (OB) cultivated on these aECMs. GAG sulfation regulated osteogenesis at all key steps of OB development. Adhesion, but not migration, was diminished by 50% (P < 0.001). Proliferation and metabolic activity were slightly (P < 0.05) and cell death events strongly (P < 0.001) down-regulated due to a switch from proliferative to matrix synthesis state. When exposed to sulfated GAGs, OB marker genes, such as alkaline phosphatase, osteoprotegerin (OPG), and osteocalcin increased by up to 28-fold (P < 0.05) and calcium deposition up to 4-fold (P < 0.05). Furthermore, GAG treatment of OBs suppressed their ability to support osteoclast (OC) differentiation and resorption. In conclusion, GAG sulfation controls bone cell homeostasis by concurrently promoting osteogenesis and suppressing their paracrine support of OC functions, thus displaying a favorable profile on bone remodeling. Whether these cellular properties translate into improved bone regeneration needs to be validated in vivo.
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Miron A, Rother S, Huebner L, Hempel U, Käppler I, Moeller S, Schnabelrauch M, Scharnweber D, Hintze V. Sulfated hyaluronan influences the formation of artificial extracellular matrices and the adhesion of osteogenic cells. Macromol Biosci 2014; 14:1783-94. [PMID: 25219504 DOI: 10.1002/mabi.201400292] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 08/01/2014] [Indexed: 01/06/2023]
Abstract
The aim of this study is to compare differentially sulfated hyaluronan (sHA) derivatives and chondroitin sulfate (CS) with respect to their ability to influence the formation of artificial extracellular matrices (aECMs) during in vitro-fibrillogenesis of collagen type I at high- and low-ionic strength. Analysis is performed using turbidity, biochemical assays, atomic force (AFM), and transmission electron microscopy (TEM). In general, high-sulfated glycosaminoglycans (GAGs) associate to a higher amount with collagen than the low-sulfated ones. The addition of GAGs prior to fibrillogenesis at low-ionic strength results in a dose-dependent decrease in fibril diameter. At high-ionic strength these effects are only obtained for the sHA derivatives but not for CS. Likewise, increasing concentrations and degree of GAG sulfation strongly affected the kinetics of fibrillogenesis. The impact of sulfation degree on F-actin location and fiber formation in SaOS-2 cells implies that adhesion-related intracellular signaling is influenced to a variable extent.
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Affiliation(s)
- Alina Miron
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01069, Dresden, Germany
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Tiedtke K, Sorokin AA, Jastrow U, Juranić P, Kreis S, Gerken N, Richter M, Arp U, Feng Y, Nordlund D, Soufli R, Fernández-Perea M, Juha L, Heimann P, Nagler B, Lee HJ, Mack S, Cammarata M, Krupin O, Messerschmidt M, Holmes M, Rowen M, Schlotter W, Moeller S, Turner JJ. Absolute pulse energy measurements of soft x-rays at the Linac Coherent Light Source. Opt Express 2014; 22:21214-26. [PMID: 25321502 DOI: 10.1364/oe.22.021214] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
This paper reports novel measurements of x-ray optical radiation on an absolute scale from the intense and ultra-short radiation generated in the soft x-ray regime of a free electron laser. We give a brief description of the detection principle for radiation measurements which was specifically adapted for this photon energy range. We present data characterizing the soft x-ray instrument at the Linac Coherent Light Source (LCLS) with respect to the radiant power output and transmission by using an absolute detector temporarily placed at the downstream end of the instrument. This provides an estimation of the reflectivity of all x-ray optical elements in the beamline and provides the absolute photon number per bandwidth per pulse. This parameter is important for many experiments that need to understand the trade-offs between high energy resolution and high flux, such as experiments focused on studying materials via resonant processes. Furthermore, the results are compared with the LCLS diagnostic gas detectors to test the limits of linearity, and observations are reported on radiation contamination from spontaneous undulator radiation and higher harmonic content.
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Hintze V, Samsonov SA, Anselmi M, Moeller S, Becher J, Schnabelrauch M, Scharnweber D, Pisabarro MT. Sulfated glycosaminoglycans exploit the conformational plasticity of bone morphogenetic protein-2 (BMP-2) and alter the interaction profile with its receptor. Biomacromolecules 2014; 15:3083-92. [PMID: 25029480 DOI: 10.1021/bm5006855] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Sulfated glycosaminoglycans (GAGs) can direct cellular processes by interacting with proteins of the extracellular matrix (ECM). In this study we characterize the interaction profiles of chemically sulfated hyaluronan (HA) and chondroitin sulfate (CS) derivatives with bone morphogenetic protein-2 (BMP-2) and investigate their relevance for complex formation with the receptor BMPR-IA. These goals were addressed by surface plasmon resonance (SPR) and ELISA in combination with molecular modeling and dynamics simulation. We found not only the interaction of BMP-2 with GAGs to be dependent on the type and sulfation of GAGs but also BMP-2/GAG/BMPR-IA complex formation. The conformational plasticity of the BMP-2 N-termini plays a key role in the structural and thermodynamic characteristics of the BMP-2/GAG/BMPR-IA system. Hence we propose a model that provides direct insights into the importance of the structural and dynamical properties of the BMP-2/BMPR-IA system for its regulation by sulfated GAGs, in which structural asymmetry plays a key role.
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Affiliation(s)
- Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden , Budapester Strasse 27, 01069 Dresden, Germany
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Kajahn J, Franz S, Rueckert E, Forstreuter I, Hintze V, Moeller S, Simon JC. Artificial extracellular matrices composed of collagen I and high sulfated hyaluronan modulate monocyte to macrophage differentiation under conditions of sterile inflammation. Biomatter 2014; 2:226-36. [PMID: 23507888 PMCID: PMC3568108 DOI: 10.4161/biom.22855] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Integration of biomaterials into tissues is often disturbed by unopposed activation of macrophages. Immediately after implantation, monocytes are attracted from peripheral blood to the implantation site where they differentiate into macrophages. Inflammatory signals from the sterile tissue injury around the implanted biomaterial mediate the differentiation of monocytes into inflammatory M1 macrophages (M1) via autocrine and paracrine mechanisms. Suppression of sustained M1 differentiation is thought to be crucial to improve implant healing. Here, we explore whether artificial extracellular matrix (aECM) composed of collagen I and hyaluronan (HA) or sulfated HA-derivatives modulate this monocyte differentiation. We mimicked conditions of sterile tissue injury in vitro using a specific cytokine cocktail containing MCP-1, IL-6 and IFNγ, which induced in monocytes a phenotype similar to M1 macrophages (high expression of CD71, HLA-DR but no CD163 and release of high amounts of pro-inflammatory cytokines IL-1β, IL-6, IL-8, IL-12 and TNFα). In the presence of aECMs containing high sulfated HA this monocyte to M1 differentiation was disturbed. Specifically, pro-inflammatory functions were impaired as shown by reduced secretion of IL-1β, IL-8, IL-12 and TNFα. Instead, release of the immunregulatory cytokine IL-10 and expression of CD163, both markers specific for anti-inflammatory M2 macrophages (M2), were induced. We conclude that aECMs composed of collagen I and high sulfated HA possess immunomodulating capacities and skew monocyte to macrophage differentiation induced by pro-inflammatory signals of sterile injury toward M2 polarization suggesting them as an effective coating for biomaterials to improve their integration.
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Affiliation(s)
- Jennifer Kajahn
- Department of Dermatology, Venereology and Allergology, Leipzig University, Leipzig, Germany
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Sotiropoulos SN, Moeller S, Jbabdi S, Xu J, Andersson JL, Auerbach EJ, Yacoub E, Feinberg D, Setsompop K, Wald L, Behrens T, Ugurbil K, Lenglet C. Effects of image reconstruction on fiber orientation mapping from multichannel diffusion MRI: reducing the noise floor using SENSE. Magn Reson Med 2013; 70:1682-9. [PMID: 23401137 PMCID: PMC3657588 DOI: 10.1002/mrm.24623] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 11/10/2012] [Accepted: 12/09/2012] [Indexed: 11/11/2022]
Abstract
PURPOSE To examine the effects of the reconstruction algorithm of magnitude images from multichannel diffusion MRI on fiber orientation estimation. THEORY AND METHODS It is well established that the method used to combine signals from different coil elements in multichannel MRI can have an impact on the properties of the reconstructed magnitude image. Using a root-sum-of-squares approach results in a magnitude signal that follows an effective noncentral-χ distribution. As a result, the noise floor, the minimum measurable in the absence of any true signal, is elevated. This is particularly relevant for diffusion-weighted MRI, where the signal attenuation is of interest. RESULTS In this study, we illustrate problems that such image reconstruction characteristics may cause in the estimation of fiber orientations, both for model-based and model-free approaches, when modern 32-channel coils are used. We further propose an alternative image reconstruction method that is based on sensitivity encoding (SENSE) and preserves the Rician nature of the single-channel, magnitude MR signal. We show that for the same k-space data, root-sum-of-squares can cause excessive overfitting and reduced precision in orientation estimation compared with the SENSE-based approach. CONCLUSION These results highlight the importance of choosing the appropriate image reconstruction method for tractography studies that use multichannel receiver coils for diffusion MRI acquisition.
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Affiliation(s)
- S. N. Sotiropoulos
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
| | - S. Moeller
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - S. Jbabdi
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
| | - J. Xu
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - J. L. Andersson
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
| | - E. J. Auerbach
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - E. Yacoub
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - D. Feinberg
- Advanced MRI Technologies, Sebastopol, CA, USA
- Helen Wills Institute for Neuroscience, University of California, Berkeley, CA, USA
| | - K. Setsompop
- Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - L.L. Wald
- Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - T.E.J. Behrens
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
- Wellcome Trust Centre for NeuroImaging, University College London, London, UK
| | - K. Ugurbil
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - C. Lenglet
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
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Hilz M, Moeller S, Koehn J, Akhundova A, Marthol H, Baltadzhieva R, Schwab S, Koehrmann M. Clinical recovery in the sub-acute stroke-phase is associated with prominent recovery of cardiovascular autonomic modulation. Auton Neurosci 2013. [DOI: 10.1016/j.autneu.2013.08.034] [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: 11/15/2022]
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Hilz M, Koehn J, Ammon F, Marcus J, Flanagan S, De Fina P, Baltadzhieva R, Schwab S, Moeller S. Valsalva maneuver shows prolonged sympathetic outflow in patients with a history of mild traumatic brain injury. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.2378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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45
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van der Smissen A, Samsonov S, Hintze V, Scharnweber D, Moeller S, Schnabelrauch M, Pisabarro MT, Anderegg U. Artificial extracellular matrix composed of collagen I and highly sulfated hyaluronan interferes with TGFβ(1) signaling and prevents TGFβ(1)-induced myofibroblast differentiation. Acta Biomater 2013; 9:7775-86. [PMID: 23602877 DOI: 10.1016/j.actbio.2013.04.023] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 03/27/2013] [Accepted: 04/09/2013] [Indexed: 01/24/2023]
Abstract
Sulfated glycosaminoglycans are promising components for functional biomaterials since sulfate groups modulate the binding of growth factors and thereby influence wound healing. Here, we have investigated the influence of an artificial extracellular matrix (aECM) consisting of collagen I (coll) and hyaluronan (HA) or highly sulfated HA (hsHA) on dermal fibroblasts (dFb) with respect to their differentiation into myofibroblasts (MFb). Fibroblasts were cultured on aECM in the presence of aECM-adsorbed or soluble transforming growth factor β1 (TGFβ1). The synthesis of α-smooth muscle actin (αSMA), collagen and the ED-A splice variant of fibronectin (ED-A FN) were analyzed at the mRNA and protein levels. Furthermore, we investigated the bioactivity and signal transduction of TGFβ1 in the presence of aECM and finally made interaction studies of soluble HA or hsHA with TGFβ1. Artificial ECM composed of coll and hsHA prevents TGFβ1-stimulated αSMA, collagen and ED-A FN expression. Our data suggest an impaired TGFβ1 bioactivity and downstream signaling in the presence of aECM containing hsHA, shown by massively reduced Smad2/3 translocation to the nucleus. These data are explained by in silico docking experiments demonstrating the occupation of the TGFβ-receptor I binding site by hsHA. Possibly, HA sulfation has a strong impact on TGFβ1-driven differentiation of dFb and thus could be used to modulate the properties of biomaterials.
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Affiliation(s)
- Anja van der Smissen
- Department of Dermatology, Venereology and Allergology, Leipzig University, 04103 Leipzig, Germany.
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Hilz M, Hoppe U, Moeller S, Köhn J. Stapedius reflex testing shows altered small muscle function in untreated Pompe patients and improvement after enzyme replacement therapy. BMC Musculoskelet Disord 2013. [PMCID: PMC3667110 DOI: 10.1186/1471-2474-14-s2-p5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Wojak-Cwik IM, Hintze V, Schnabelrauch M, Moeller S, Dobrzynski P, Pamula E, Scharnweber D. Poly(L-lactide-co-glycolide) scaffolds coated with collagen and glycosaminoglycans: impact on proliferation and osteogenic differentiation of human mesenchymal stem cells. J Biomed Mater Res A 2013; 101:3109-22. [PMID: 23526792 DOI: 10.1002/jbm.a.34620] [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] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/21/2013] [Accepted: 01/23/2013] [Indexed: 12/27/2022]
Abstract
In this study, we analyzed poly(L-lactide-co-glycolide) (PLGA) scaffolds modified with artificial extracellular matrices (aECM) consisting of collagen type I, chondroitin sulphate, and sulphated hyaluronan (sHya). We investigated the effect of these aECM coatings on proliferation and osteogenic differentiation of human mesenchymal stem cells (hMSC) in vitro. We found that scaffolds were homogeneously coated, and cross-linking of aECM did not significantly influence the amount of collagen immobilized. Cell proliferation was significantly increased on cross-linked surfaces in expansion medium (EM), but was retarded on cross-linked and non-cross-linked collagen/sHya coatings. The alkaline phosphatase activity was increased on sHya-containing coatings in EM even without the presence of differentiation supplements, but was six to ten times higher in differentiation medium (DM) and comparable for cross-linked and non-cross-linked collagen/sHya. The highest amount of calcium phosphate mineral was deposited on day 28 on cross-linked collagen/sHya. Therefore, coatings of PLGA scaffolds with collagen/sHya promoted the osteogenic differentiation of hMSCs in vitro and might be an interesting candidate for the modification of PLGA for bone reconstruction in vivo.
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Affiliation(s)
- I M Wojak-Cwik
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. A. Mickiewicza 30, Krakow, Poland; Institute of Material Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, Dresden, Germany
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Hess R, Jaeschke A, Neubert H, Hintze V, Moeller S, Schnabelrauch M, Wiesmann HP, Hart DA, Scharnweber D. Synergistic effect of defined artificial extracellular matrices and pulsed electric fields on osteogenic differentiation of human MSCs. Biomaterials 2012; 33:8975-85. [PMID: 22995709 DOI: 10.1016/j.biomaterials.2012.08.056] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 08/23/2012] [Indexed: 12/22/2022]
Abstract
In vivo, bone formation is a complex, tightly regulated process, influenced by multiple biochemical and physical factors. To develop a vital bone tissue engineering construct, all of these individual components have to be considered and integrated to gain an in vivo-like stimulation of target cells. The purpose of the present studies was to investigate the synergistic role of defined biochemical and physical microenvironments with respect to osteogenic differentiation of human mesenchymal stem cells (MSCs). Biochemical microenvironments have been designed using artificial extracellular matrices (aECMs), containing collagen I (coll) and glycosaminoglycans (GAGs) like chondroitin sulfate (CS), or a high-sulfated hyaluronan derivative (sHya), formulated as coatings on three-dimensional poly(caprolactone-co-lactide) (PCL) scaffolds. As part of the physical microenvironment, cells were exposed to pulsed electric fields via transformer-like coupling (TC). Results showed that aECM containing sHya enhanced osteogenic differentiation represented by increases in ALP activity and gene-expression (RT-qPCR) of several bone-related proteins (RUNX-2, ALP, OPN). Electric field stimulation alone did not influence cell proliferation, but osteogenic differentiation was enhanced if osteogenic supplements were provided, showing synergistic effects by the combination of sHya and electric fields. These results will improve the understanding of bone regeneration processes and support the development of effective tissue engineered bone constructs.
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Affiliation(s)
- Ricarda Hess
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany.
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Hilz MJ, Ehmann EC, Pauli E, Baltadzhieva R, Koehn J, Moeller S, DeFina P, Axelrod FB. Combined counter-maneuvers accelerate recovery from orthostatic hypotension in familial dysautonomia. Acta Neurol Scand 2012; 126:162-70. [PMID: 22571291 DOI: 10.1111/j.1600-0404.2012.01670.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2012] [Indexed: 11/29/2022]
Abstract
BACKGROUND In patients with familial dysautonomia (FD), prominent orthostatic hypotension (OH) endangers cerebral perfusion. Supine repositioning or abdominal compression improves systolic and diastolic blood pressure (BPsys and BPdia). OBJECTIVE To determine whether OH recovers faster with combined supine repositioning and abdominal compression than with supine repositioning alone. METHODS In 9 patients with FD (17.8 ± 3.9 years) and 10 healthy controls (18.8 ± 5 years), we assessed 2-min averages of BPsys, BPdia, and heart rate (HR) during supine rest, standing, supine repositioning, another supine rest, second standing, and supine repositioning with abdominal compression by leg elevation and flexion. We determined BPsys- and BPdia-recovery-times as intervals from return to supine until BP reached values equivalent to each participant's 2-min average at supine rest minus two standard deviations. Differences in signal values and BP-recovery-times between groups and positions were assessed by ANOVA and post hoc testing (significance: P < 0.05). RESULTS Patients with FD had pronounced OH that improved with supine repositioning. However, BP only reached supine rest values with additional abdominal compression. In controls, BP was stable during positional changes. Without abdominal compression, BP-recovery-times were longer in patients with FD than those in controls, but similar to control values with compression (BPsys: 83.7 ± 64.1 vs 36.6 ± 49.5 s; P = 0.013; BPdia: 84.6 ± 65.2 vs 35.3 ± 48.9 s; P = 0.009). CONCLUSION Combining supine repositioning with abdominal compression significantly accelerates recovery from OH and thus lowers the risk of hypotension-induced cerebral hypoperfusion.
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Affiliation(s)
| | - E. C. Ehmann
- Department of Neurology; University of Erlangen-Nuremberg; Erlangen; Germany
| | - E. Pauli
- Department of Neurology; University of Erlangen-Nuremberg; Erlangen; Germany
| | - R. Baltadzhieva
- Department of Neurology, Medicine, Psychiatry; New York University; New York; NY; USA
| | - J. Koehn
- Department of Neurology; University of Erlangen-Nuremberg; Erlangen; Germany
| | - S. Moeller
- Department of Neurology; University of Erlangen-Nuremberg; Erlangen; Germany
| | - P. DeFina
- International Brain Research Foundation; Flanders; NJ; USA
| | - F. B. Axelrod
- New York University Dysautonomia Center; New York; NY; USA
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50
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Moeller S, Hilz MJ, Blinzler C, Koehn J, Doerfler A, Schwab S, Kohrmann M. Extracranial internal carotid artery vasospasm due to sympathetic dysfunction. Neurology 2012; 78:1892-4. [DOI: 10.1212/wnl.0b013e318258f7ab] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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