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Alt F, Heinemann C, Kruppke B. Class I Biocompatible DLP-Printed Acrylate Impairs Adhesion and Proliferation of Human Mesenchymal Stromal Cells in Indirect Cytotoxicity Assay. Biomed Res Int 2023; 2023:8305995. [PMID: 37869629 PMCID: PMC10590261 DOI: 10.1155/2023/8305995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 06/30/2023] [Accepted: 07/13/2023] [Indexed: 10/24/2023]
Abstract
The popular method of digital light processing 3D printing (DLP) for complex and individual laboratory equipment requires materials that are as inert as possible for use in contact with cells for subsequent investigations. However, the per se incomplete curing of acrylate resins by UV light leaves residuals that are not suitable for cell culture application. Therefore, we evaluated the cytotoxicity of four commercially available acrylate resins with bone marrow-derived human mesenchymal stromal cells (BM-hMSC) in an indirect cytotoxicity test. This involved incubating the printed cylinders in Transwell™ inserts for 7 days. While the degree of crosslinking did not increase significantly between freshly printed and stored samples (3 weeks in ambient conditions), the storage improved the material's performance in terms of cytocompatibility. The DNA amount and LDH activity showed a direct influence of the resin residuals on cell adhesion. The class I acrylate Surgical Guide™ left no adherent cells after 7 days, regardless of previous storage. In comparison, the Basic Ivory™ resin after storage allowed same amount of adherent cells after 7 days as the polystyrene reference. We conclude that resin residuals of certain materials are released, which allows the use of the resins in indirect contact with cells thereafter.
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Affiliation(s)
- Franziska Alt
- Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technical University Dresden, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Christiane Heinemann
- Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technical University Dresden, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Benjamin Kruppke
- Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technical University Dresden, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
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2
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Heinemann C, Buchner F, Lee PS, Bernhardt A, Kruppke B, Wiesmann HP, Hintze V. Effects of Gamma Irradiation and Supercritical Carbon Dioxide Sterilization on Methacrylated Gelatin/Hyaluronan Hydrogels. J Funct Biomater 2023; 14:317. [PMID: 37367281 DOI: 10.3390/jfb14060317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/30/2023] [Accepted: 06/06/2023] [Indexed: 06/28/2023] Open
Abstract
Biopolymer hydrogels have become an important group of biomaterials in experimental and clinical use. However, unlike metallic or mineral materials, they are quite sensitive to sterilization. The aim of this study was to compare the effects of gamma irradiation and supercritical carbon dioxide (scCO2) treatment on the physicochemical properties of different hyaluronan (HA)- and/or gelatin (GEL)-based hydrogels and the cellular response of human bone marrow-derived mesenchymal stem cells (hBMSC). Hydrogels were photo-polymerized from methacrylated HA, methacrylated GEL, or a mixture of GEL/HA. The composition and sterilization methods altered the dissolution behavior of the biopolymeric hydrogels. There were no significant differences in methacrylated GEL release but increased methacrylated HA degradation of gamma-irradiated samples. Pore size/form remained unchanged, while gamma irradiation decreased the elastic modulus from about 29 kPa to 19 kPa compared to aseptic samples. HBMSC proliferated and increased alkaline phosphatase activity (ALP) particularly in aseptic and gamma-irradiated methacrylated GEL/HA hydrogels alike, while scCO2 treatment had a negative effect on both proliferation and osteogenic differentiation. Thus, gamma-irradiated methacrylated GEL/HA hydrogels are a promising base for multi-component bone substitute materials.
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Affiliation(s)
- Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - Frauke Buchner
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - Poh Soo Lee
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - Anne Bernhardt
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus, Faculty of Medicine, Technische Universität Dresden, D-01307 Dresden, Germany
| | - Benjamin Kruppke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - Hans-Peter Wiesmann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069 Dresden, Germany
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Kilian D, Poddar A, Desrochers V, Heinemann C, Halfter N, Liu S, Rother S, Gelinsky M, Hintze V, Lode A. Cellular adhesion and chondrogenic differentiation inside an alginate-based bioink in response to tailorable artificial matrices and tannic acid treatment. Biomater Adv 2023; 147:213319. [PMID: 36758282 DOI: 10.1016/j.bioadv.2023.213319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/30/2022] [Accepted: 01/27/2023] [Indexed: 02/04/2023]
Abstract
Many established bioinks fulfill important requirements regarding fabrication standards and cytocompatibility. Current research focuses on development of functionalized bioinks with an improved support of tissue-specific cell differentiation. Many approaches primarily depend on decellularized extracellular matrices or blood components. In this study, we investigated the combination of a highly viscous alginate-methylcellulose (algMC) bioink with collagen-based artificial extracellular matrix (aECM) as a finely controllable and tailorable system composed of collagen type I (col) with and without chondroitin sulfate (CS) or sulfated hyaluronan (sHA). As an additional stabilizer, the polyphenol tannic acid (TA) was integrated into the inks. The assessment of rheological properties and printability as well as hydrogel microstructure revealed no adverse effect of the integrated components on the inks. Viability, adhesion, and proliferation of bioprinted immortalized human mesenchymal stem cells (hTERT-MSC) was improved indicating enhanced interaction with the designed microenvironment. Furthermore, chondrogenic matrix production (collagen type II and sulfated glycosaminoglycans) by primary human chondrocytes (hChon) was enhanced by aECM. Supplementing the inks with TA was required for these positive effects but caused cytotoxicity as soon as TA concentrations exceeded a certain amount. Thus, combining tailorable aECM with algMC and balanced TA addition proved to be a promising approach for promoting adhesion of immortalized stem cells and differentiation of chondrocytes in bioprinted scaffolds.
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Affiliation(s)
- David Kilian
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Aayush Poddar
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Vanessa Desrochers
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Strasse 27, 01069 Dresden, Germany
| | - Norbert Halfter
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Strasse 27, 01069 Dresden, Germany
| | - Suihong Liu
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany; Rapid Manufacturing Engineering Center, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
| | - Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Strasse 27, 01069 Dresden, Germany; Center for Molecular Signaling (PZMS), Saarland University School of Medicine, Homburg, Saar, Germany
| | - Michael Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 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
| | - Anja Lode
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany.
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Halfter N, Espinosa-Cano E, Pontes-Quero GM, Ramírez-Jiménez RA, Heinemann C, Möller S, Schnabelrauch M, Wiesmann HP, Hintze V, Aguilar MR. Ketoprofen-Based Polymer-Drug Nanoparticles Provide Anti-Inflammatory Properties to HA/Collagen Hydrogels. J Funct Biomater 2023; 14:jfb14030160. [PMID: 36976084 PMCID: PMC10059015 DOI: 10.3390/jfb14030160] [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: 02/14/2023] [Revised: 03/09/2023] [Accepted: 03/11/2023] [Indexed: 03/19/2023] Open
Abstract
Current limitations of wound dressings for treating chronic wounds require the development of novel approaches. One of these is the immune-centered approach, which aims to restore the pro-regenerative and anti-inflammatory properties of macrophages. Under inflammatory conditions, ketoprofen nanoparticles (KT NPs) can reduce pro-inflammatory markers of macrophages and increase anti-inflammatory cytokines. To assess their suitability as part of wound dressings, these NPs were combined with hyaluronan (HA)/collagen-based hydro- (HGs) and cryogels (CGs). Different HA and NP concentrations and loading techniques for NP incorporation were used. The NP release, gel morphology, and mechanical properties were studied. Generally, colonialization of the gels with macrophages resulted in high cell viability and proliferation. Furthermore, direct contact of the NPs to the cells reduced the level of nitric oxide (NO). The formation of multinucleated cells on the gels was low and further decreased by the NPs. For the HGs that produced the highest reduction in NO, extended ELISA studies showed reduced levels of the pro-inflammatory markers PGE2, IL-12 p40, TNF-α, and IL-6. Thus, HA/collagen-based gels containing KT NPs may represent a novel therapeutic approach for treating chronic wounds. Whether effects observed in vitro translate into a favorable profile on skin regeneration in vivo will require rigorous testing.
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Affiliation(s)
- Norbert Halfter
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany
| | - Eva Espinosa-Cano
- Group of Biomaterials, Institute of Polymer Science and Technology ICTP-CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, C/Monforte de Lemos 3/5, 28029 Madrid, Spain
| | - Gloria María Pontes-Quero
- Group of Biomaterials, Institute of Polymer Science and Technology ICTP-CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, C/Monforte de Lemos 3/5, 28029 Madrid, Spain
| | - Rosa Ana Ramírez-Jiménez
- Group of Biomaterials, Institute of Polymer Science and Technology ICTP-CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, C/Monforte de Lemos 3/5, 28029 Madrid, Spain
| | - Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany
| | - Stephanie Möller
- Department of Biomaterials, INNOVENT e. V., Prüssingstraße 27B, 07745 Jena, Germany
| | | | - Hans-Peter Wiesmann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, 01069 Dresden, Germany
- Correspondence: (V.H.); (M.R.A.)
| | - Maria Rosa Aguilar
- Group of Biomaterials, Institute of Polymer Science and Technology ICTP-CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, C/Monforte de Lemos 3/5, 28029 Madrid, Spain
- Correspondence: (V.H.); (M.R.A.)
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Lee PS, Heinemann C, Zheng K, Appali R, Alt F, Krieghoff J, Bernhardt A, Boccaccini AR, van Rienen U, Hintze V. The interplay of collagen/bioactive glass nanoparticle coatings and electrical stimulation regimes distinctly enhanced osteogenic differentiation of human mesenchymal stem cells. Acta Biomater 2022; 149:373-386. [PMID: 35817340 DOI: 10.1016/j.actbio.2022.06.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 06/24/2022] [Accepted: 06/30/2022] [Indexed: 12/25/2022]
Abstract
Increasing research has incorporated bioactive glass nanoparticles (BGN) and electric field (EF) stimulation for bone tissue engineering and regeneration applications. However, their interplay and the effects of different EF stimulation regimes on osteogenic differentiation of human mesenchymal stem cells (hMSC) are less investigated. In this study, we introduced EF with negligible magnetic field strength through a well-characterized transformer-like coupling (TLC) system, and applied EF disrupted (4/4) or consecutive (12/12) regime on type I collagen (Col) coatings with/without BGN over 28 days. Additionally, dexamethasone was excluded to enable an accurate interpretation of BGN and EF in supporting osteogenic differentiation. Here, we demonstrated the influences of BGN and EF on collagen topography and maintaining coating stability. Coupled with the release profile of Si ions from the BGN, cell proliferation and calcium deposition were enhanced in the Col-BGN samples after 28 days. Further, osteogenic differentiation was initiated as early as d 7, and each EF regime was shown to activate distinct pathways. The disrupted (4/4) regime was associated with the BMP/Smad4 pathways that up-regulate Runx2/OCN gene expression on d 7, with a lesser effect on ALP activity. In contrast, the canonical Wnt/β-Catenin signaling pathway activated through mechanotransduction cues is associated with the consecutive (12/12) regime, with significantly elevated ALP activity and Sp7 gene expression reported on d 7. In summary, our results illustrated the synergistic effects of BGN and EF in different stimulation regimes on osteogenic differentiation that can be further exploited to enhance current bone tissue engineering and regeneration approaches. STATEMENT OF SIGNIFICANCE: The unique release mechanisms of silica from bioactive glass nanoparticles (BGN) were coupled with pulsatile electric field (EF) stimulation to support hMSC osteogenic differentiation, in the absence of dexamethasone. Furthermore, the interplay with consecutive (12/12) and disrupted (4/4) stimulation regimes was investigated. The reported physical, mechanical and topographical effects of BGN and EF on the collagen coating, hMSC and the distinct progression of osteogenic differentiation (canonical Wnt/β-Catenin and BMP/Smad) triggered by respective stimulation regime were not explicitly reported previously. These results provide the fundamentals for further exploitations on BGN composites with metal ions and rotation of EF regimes to enhance osteogenic differentiation. The goal is sustaining continual osteogenic differentiation and achieving a more physiologically-relevant state and bone constructs in vitro.
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Affiliation(s)
- Poh Soo Lee
- Institute of General Electrical Engineering, Faculty of Computer Science and Electrical Engineering, University of Rostock, Albert-Einstein-Straße 2, Rostock 18059, Germany; Max Bergmann Centre of Biomaterials, Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technische Universität Dresden, Budapesterstraße 27, Dresden, Saxony 01069, Germany.
| | - Christiane Heinemann
- Max Bergmann Centre of Biomaterials, Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technische Universität Dresden, Budapesterstraße 27, Dresden, Saxony 01069, Germany
| | - Kai Zheng
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China; Department of Material Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremburg, Cauerstraße 6, Erlangen 91058, Germany
| | - Revathi Appali
- Institute of General Electrical Engineering, Faculty of Computer Science and Electrical Engineering, University of Rostock, Albert-Einstein-Straße 2, Rostock 18059, Germany; Department of Ageing of Individuals and Society, Interdisciplinary Faculty, University of Rostock, Albert-Einstein-Straße 21, Rostock 18059, Germany
| | - Franziska Alt
- Max Bergmann Centre of Biomaterials, Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technische Universität Dresden, Budapesterstraße 27, Dresden, Saxony 01069, Germany
| | - Jan Krieghoff
- Institute of Pharmacy, Pharmaceutical Technology, Faculty of Medicine, University Leipzig. Eilenburgerstraße 15a, Leipzig 04317, Germany
| | - Anne Bernhardt
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Fetscherstraße 74, Dresden 01307, Germany
| | - Aldo R Boccaccini
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing 210029, China; Department of Material Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremburg, Cauerstraße 6, Erlangen 91058, Germany
| | - Ursula van Rienen
- Institute of General Electrical Engineering, Faculty of Computer Science and Electrical Engineering, University of Rostock, Albert-Einstein-Straße 2, Rostock 18059, Germany; Department of Ageing of Individuals and Society, Interdisciplinary Faculty, University of Rostock, Albert-Einstein-Straße 21, Rostock 18059, Germany; Department of Life, Light and Matter, Interdisciplinary Faculty, University of Rostock, Albert-Einstein-Straße 25, Rostock 18059, Germany
| | - Vera Hintze
- Max Bergmann Centre of Biomaterials, Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technische Universität Dresden, Budapesterstraße 27, Dresden, Saxony 01069, Germany.
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Hayer J, Nysar D, Schmitz A, Leubner C, Heinemann C, Steinhoff-Wagner J. Wound lesions caused by ear tagging in unweaned calves: assessing the prevalence of wound lesions and identifying risk factors. Animal 2022; 16:100454. [DOI: 10.1016/j.animal.2022.100454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 12/21/2021] [Accepted: 01/03/2022] [Indexed: 11/16/2022] Open
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Kroschwald LM, Allerdt F, Bernhardt A, Rother S, Zheng K, Maqsood I, Halfter N, Heinemann C, Möller S, Schnabelrauch M, Hacker MC, Rammelt S, Boccaccini AR, Hintze V. Artificial Extracellular Matrices Containing Bioactive Glass Nanoparticles Promote Osteogenic Differentiation in Human Mesenchymal Stem Cells. Int J Mol Sci 2021; 22:ijms222312819. [PMID: 34884623 PMCID: PMC8657909 DOI: 10.3390/ijms222312819] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 02/07/2023] Open
Abstract
The present study analyzes the capacity of collagen (coll)/sulfated glycosaminoglycan (sGAG)-based surface coatings containing bioactive glass nanoparticles (BGN) in promoting the osteogenic differentiation of human mesenchymal stroma cells (hMSC). Physicochemical characteristics of these coatings and their effects on proliferation and osteogenic differentiation of hMSC were investigated. BGN were stably incorporated into the artificial extracellular matrices (aECM). Oscillatory rheology showed predominantly elastic, gel-like properties of the coatings. The complex viscosity increased depending on the GAG component and was further elevated by adding BGN. BGN-containing aECM showed a release of silicon ions as well as an uptake of calcium ions. hMSC were able to proliferate on coll and coll/sGAG coatings, while cellular growth was delayed on aECM containing BGN. However, a stimulating effect of BGN on ALP activity and calcium deposition was shown. Furthermore, a synergistic effect of sGAG and BGN was found for some donors. Our findings demonstrated the promising potential of aECM and BGN combinations in promoting bone regeneration. Still, future work is required to further optimize the BGN/aECM combination for increasing its combined osteogenic effect.
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Affiliation(s)
- Lysann M. Kroschwald
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital “Carl Gustav Carus”, Technische Universität Dresden, Fetscherstraße 74, D-01307 Dresden, Germany; (L.M.K.); (A.B.)
| | - Felix Allerdt
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, D-01069 Dresden, Germany; (F.A.); (S.R.); (N.H.); (C.H.)
| | - Anne Bernhardt
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital “Carl Gustav Carus”, Technische Universität Dresden, Fetscherstraße 74, D-01307 Dresden, Germany; (L.M.K.); (A.B.)
| | - Sandra Rother
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, D-01069 Dresden, Germany; (F.A.); (S.R.); (N.H.); (C.H.)
| | - Kai Zheng
- Institute of Biomaterials, University of Erlangen-Nuremberg, D-91058 Erlangen, Germany; (K.Z.); (A.R.B.)
| | - Iram Maqsood
- Institute for Pharmacy, Pharmaceutical Technology, University Leipzig, D-04317 Leipzig, Germany;
- Riphah Institute of Pharmaceutical Sciences (RIPS), Riphah International University (RIU), Lahore 54000, Pakistan
| | - Norbert Halfter
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, D-01069 Dresden, Germany; (F.A.); (S.R.); (N.H.); (C.H.)
| | - Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, D-01069 Dresden, Germany; (F.A.); (S.R.); (N.H.); (C.H.)
| | - Stephanie Möller
- Biomaterials Department, INNOVENT e.V., D-07745 Jena, Germany; (S.M.); (M.S.)
| | | | - Michael C. Hacker
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University, D-40225 Düsseldorf, Germany;
| | - Stefan Rammelt
- University Centre for Orthopaedics, Plastic and Trauma Surgery, University Hospital Carl Gustav Carus, D-01307 Dresden, Germany;
| | - Aldo R. Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, D-91058 Erlangen, Germany; (K.Z.); (A.R.B.)
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, Budapester Straße 27, D-01069 Dresden, Germany; (F.A.); (S.R.); (N.H.); (C.H.)
- Correspondence:
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Phillips I, Hug A, Westran N, Allan L, Heinemann C, Ezhil V. P30.03 A Simple Solution to Screening for Dietetic Need in Patients with Advanced Non-Small Cell Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.648] [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: 11/27/2022]
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Heinemann C, Adam J, Kruppke B, Hintze V, Wiesmann HP, Hanke T. How to Get Them off?-Assessment of Innovative Techniques for Generation and Detachment of Mature Osteoclasts for Biomaterial Resorption Studies. Int J Mol Sci 2021; 22:ijms22031329. [PMID: 33572748 PMCID: PMC7865995 DOI: 10.3390/ijms22031329] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/22/2021] [Accepted: 01/24/2021] [Indexed: 12/14/2022] Open
Abstract
The fusion process of mononuclear monocytes into multinuclear osteoclasts in vitro is an essential process for the study of osteoclastic resorption of biomaterials. Thereby biomaterials offer many influencing factors such as sample shape, material composition, and surface topography, which can have a decisive influence on the fusion and thus the entire investigation. For the specific investigation of resorption, it can therefore be advantageous to skip the fusion on samples and use mature, predifferentiated osteoclasts directly. However, most conventional detachment methods (cell scraper, accutase), lead to a poor survival rate of osteoclasts or to a loss of function of the cells after their reseeding. In the present study different conventional and novel methods of detachment in combination with different culture surfaces were investigated to obtain optimal osteoclast differentiation, yield, and vitality rates without loss of function. The innovative method-using thermoresponsive surfaces for cultivation and detachment-was found to be best suited. This is in particular due to its ability to maintain osteoclast activity, as proven by TRAP 5b-, CTSK-activity and resorption pits on dentin discs and decellularized osteoblast-derived matrix plates. In conclusion, it is shown, that osteoclasts can be predifferentiated on cell culture dishes and transferred to a reference biomaterial under preservation of osteoclastic resorption activity, providing biomaterial researchers with a novel tool for material characterization.
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Kruppke B, Heinemann C, Gebert A, Rohnke M, Weiß M, Henß A, Wiesmann HP, Hanke T. Strontium substitution of gelatin modified calcium hydrogen phosphates as porous hard tissue substitutes. J Biomed Mater Res A 2020; 109:722-732. [PMID: 32654374 DOI: 10.1002/jbm.a.37057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 12/27/2022]
Abstract
Aiming at the generation of a high strontium-containing degradable bone substitute, the exchange of calcium with strontium in gelatin-modified brushite was investigated. The ion substitution showed two mineral groups, the high-calcium containing minerals with a maximum measured molar Ca/Sr ratio of 80%/20% (mass ratio 63%/37%) and the high-strontium containing ones with a maximum measured molar Ca/Sr ratio of 21%/79% (mass ratio 10%/90%). In contrast to the high-strontium mineral phases, a high mass loss was observed for the calcium-based minerals during incubation in cell culture medium (alpha-MEM), but also an increase in strength owing to dissolution and re-precipitation. This resulted for the former in a decrease of cation concentration (Ca + Sr) in the medium, while the pH value decreased and the phosphate ion concentration rose significantly. The latter group of materials, the high-strontium containing ones, showed only a moderate change in mass and a decrease in strength, but the Ca + Sr concentration remained permanently above the initial calcium concentration in the medium. This might be advantageous for a future planned application by supporting bone regeneration on the cellular level.
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Affiliation(s)
- Benjamin Kruppke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Annett Gebert
- Institute for Complex Materials, Leibniz-Institute for Solid State and Materials Research Dresden (IFW Dresden), Dresden, Germany
| | - Marcus Rohnke
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Manuel Weiß
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Anja Henß
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Hans-Peter Wiesmann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Thomas Hanke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
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Kruppke B, Weiß J, Rößler S, Heinemann C, Hanke T. Novel degradation flow-through chamber for in vitro biomaterial characterization. J Biomed Mater Res B Appl Biomater 2020; 108:3124-3133. [PMID: 32475065 DOI: 10.1002/jbm.b.34638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 04/15/2020] [Accepted: 05/04/2020] [Indexed: 11/10/2022]
Abstract
The characterization of degradation of biodegradable materials for tissue regeneration is classically carried out in three steps: in vitro degradation analysis, in vitro cell culture, and in vivo animal experiments. Each step involves an increasing complexity and should serve a more sophisticated material selection, which serves as an orientation to clinical studies and the final application in patients. Recently, the usefulness of degradation analyses is being discussed. In this context, the aim of this work is to increase the importance of in vitro degradation analysis by using flowing media to move closer to the in vivo situation. In the long term, this should lead to a more sensitive biomaterial characterization as well as to a replacement of time-consuming static or quasi-dynamic incubation experiments. The practicability of the novel chamber is demonstrated in context of a degradation study of silica/collagen/calcium phosphate composites in flowing media with physiological (2.4 mM) and lowered (0.5 mM) calcium ion concentrations. This is done by comparison with static and quasi-dynamic incubation experiments. In order to keep all media regimes comparable to each other, for the dynamic experiment, a flow rate was chosen equivalent to the medium exchange in quasi-dynamic incubation. Under flow-through conditions, there is a clearly decreased tendency to lower the calcium concentration, so that a concentration close to the physiological initial situation can be continuously maintained.
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Affiliation(s)
- Benjamin Kruppke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Jonas Weiß
- Institute of Biomedical Engineering, Technische Universität Dresden, Dresden, Germany
| | - Sina Rößler
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Thomas Hanke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
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Phillips I, Allan L, Hug A, Westran N, Heinemann C, Hewish M, Mehta A, Saxby H, Mainsiouw L, Boateng S, Evans P, Ezhil V. Symptom burden strongly correlates with the need for a dietitian in advanced NSCLC. Lung Cancer 2020. [DOI: 10.1016/s0169-5002(20)30214-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Krieghoff J, Picke AK, Salbach-Hirsch J, Rother S, Heinemann C, Bernhardt R, Kascholke C, Möller S, Rauner M, Schnabelrauch M, Hintze V, Scharnweber D, Schulz-Siegmund M, Hacker MC, Hofbauer LC, Hofbauer C. Increased pore size of scaffolds improves coating efficiency with sulfated hyaluronan and mineralization capacity of osteoblasts. Biomater Res 2019; 23:26. [PMID: 31890268 PMCID: PMC6921484 DOI: 10.1186/s40824-019-0172-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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: 08/20/2019] [Accepted: 11/13/2019] [Indexed: 12/13/2022] Open
Abstract
Background Delayed bone regeneration of fractures in osteoporosis patients or of critical-size bone defects after tumor resection are a major medical and socio-economic challenge. Therefore, the development of more effective and osteoinductive biomaterials is crucial. Methods We examined the osteogenic potential of macroporous scaffolds with varying pore sizes after biofunctionalization with a collagen/high-sulfated hyaluronan (sHA3) coating in vitro. The three-dimensional scaffolds were made up from a biodegradable three-armed lactic acid-based macromer (TriLA) by cross-polymerization. Templating with solid lipid particles that melt during fabrication generates a continuous pore network. Human mesenchymal stem cells (hMSC) cultivated on the functionalized scaffolds in vitro were investigated for cell viability, production of alkaline phosphatase (ALP) and bone matrix formation. Statistical analysis was performed using student’s t-test or two-way ANOVA. Results We succeeded in generating scaffolds that feature a significantly higher average pore size and a broader distribution of individual pore sizes (HiPo) by modifying composition and relative amount of lipid particles, macromer concentration and temperature for cross-polymerization during scaffold fabrication. Overall porosity was retained, while the scaffolds showed a 25% decrease in compressive modulus compared to the initial TriLA scaffolds with a lower pore size (LoPo). These HiPo scaffolds were more readily coated as shown by higher amounts of immobilized collagen (+ 44%) and sHA3 (+ 25%) compared to LoPo scaffolds. In vitro, culture of hMSCs on collagen and/or sHA3-coated HiPo scaffolds demonstrated unaltered cell viability. Furthermore, the production of ALP, an early marker of osteogenesis (+ 3-fold), and formation of new bone matrix (+ 2.5-fold) was enhanced by the functionalization with sHA3 of both scaffold types. Nevertheless, effects were more pronounced on HiPo scaffolds about 112%. Conclusion In summary, we showed that the improvement of scaffold pore sizes enhanced the coating efficiency with collagen and sHA3, which had a significant positive effect on bone formation markers, underlining the promise of using this material approach for in vivo studies.
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Affiliation(s)
- Jan Krieghoff
- 1Institute for Pharmacy, Pharmaceutical Technology, University Leipzig, Leipzig, Germany
| | - Ann-Kristin Picke
- 2Division of Endocrinology, Diabetes, and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany.,3Center for Healthy Aging, TU Dresden Medical Center, Dresden, Germany
| | - Juliane Salbach-Hirsch
- 2Division of Endocrinology, Diabetes, and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany.,3Center for Healthy Aging, TU Dresden Medical Center, Dresden, Germany
| | - Sandra Rother
- 4Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany.,Present address: Department of Cellular and Molecular Medicine, Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA USA
| | - Christiane Heinemann
- 4Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Ricardo Bernhardt
- 4Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany.,6Leibniz Institute of Polymer Research Dresden, Dresden, Germany
| | - Christian Kascholke
- 1Institute for Pharmacy, Pharmaceutical Technology, University Leipzig, Leipzig, Germany
| | | | - Martina Rauner
- 2Division of Endocrinology, Diabetes, and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany.,3Center for Healthy Aging, TU Dresden Medical Center, Dresden, Germany
| | | | - Vera Hintze
- 4Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Dieter Scharnweber
- 4Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | | | - Michael C Hacker
- 1Institute for Pharmacy, Pharmaceutical Technology, University Leipzig, Leipzig, Germany
| | - Lorenz C Hofbauer
- 2Division of Endocrinology, Diabetes, and Metabolic Bone Diseases, Department of Medicine III, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany.,3Center for Healthy Aging, TU Dresden Medical Center, Dresden, Germany.,8Center for Regenerative Therapies, Dresden, Germany
| | - Christine Hofbauer
- 9Orthopedics and Trauma Surgery Center, Technische Universität Dresden, Dresden, Germany
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Heinemann C, Brünler R, Kreschel C, Kruppke B, Bernhardt R, Aibibu D, Cherif C, Wiesmann HP, Hanke T. Bioinspired calcium phosphate mineralization on Net-Shape-Nonwoven chitosan scaffolds stimulates human bone marrow stromal cell differentiation. ACTA ACUST UNITED AC 2019; 14:045017. [PMID: 31170696 DOI: 10.1088/1748-605x/ab27a4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Chitosan fibers were processed using the Net-Shape-Nonwoven (NSN) technique in order to create porous scaffolds which were functionalized in two bioinspired ways: collagen type I coating and unique mineralization with organically modified hydroxyapatite (ormoHAP). While collagen is common to enhance cell attachment on surfaces, the electric-field assisted migration and deposition of ormoHAP on the surface of the NSN-scaffolds is a novel technique which enables sub-micrometer sized mineralization while maintaining the original pore structure. Microscopy revealed fast attachment and morphological adaptation of the cells on both, the pure and the functionalized NSN-scaffolds. Remarkably, the cell number of osteogenically induced hBMSC on ormoHAP-modified NSN-scaffolds increased 3.5-5 fold compared to pure NSN-scaffolds. Osteogenic differentiation of hBMSC/osteoblasts was highest on collagen-functionalized NSN-scaffolds. RT-PCR studies revealed gene expression of ALP, BSP II, and osteocalcin to be high for all NSN-scaffolds. Overall, the NSN-scaffold functionalization with collagen and ormoHAP improved attachment, proliferation, and differentiation of hBMSC and therefore revealed the remarkable potential of their application for the tissue engineering of bone.
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Affiliation(s)
- C Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069, Germany
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Heinemann C, Bonitz S, Hermann J. Pränatale Diagnosestellung einer unilateralen Nierenvenenthrombose und deren postnataler Verlauf: eine Falldarstellung. Geburtshilfe Frauenheilkd 2019. [DOI: 10.1055/s-0039-1692038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- C Heinemann
- Klinik für Frauenheilkunde und Geburtshilfe, Sophien- und Hufeland – Klinikum Weimar
| | - S Bonitz
- Klinik für Frauenheilkunde und Geburtshilfe, Sophien- und Hufeland – Klinikum Weimar
| | - J Hermann
- Klinik für Frauenheilkunde und Geburtshilfe, Sophien- und Hufeland – Klinikum Weimar
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Heinemann C, Heinemann S, Rößler S, Kruppke B, Wiesmann HP, Hanke T. Organically modified hydroxyapatite (ormoHAP) nanospheres stimulate the differentiation of osteoblast and osteoclast precursors: a co-culture study. ACTA ACUST UNITED AC 2019; 14:035015. [PMID: 30870824 DOI: 10.1088/1748-605x/ab0fad] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Isolated nanospheres consisting of organically modified hydroxyapatite (ormoHAP), prepared by an electric field-assisted ion double migration process, were embedded in foamed gelatin to form a composite scaffold. Degradation rates have been demonstrated to correlate with the crosslinking degree (40%, 80%) as well as with the mineral content of the scaffolds (0%, 20%, 40%). A human co-culture model of osteoblasts and osteoclasts, derived from bone marrow stromal cells and monocytes, respectively, without external addition of the factors RANKL and M-CSF, was run for up to 42 d in order to characterize the action of the ormoHAP-gelatin scaffolds on the co-culture. Examination was performed by quantitative biochemical methods (DNA, LDH, ALP, TRAP5b), gene expression analysis (ALP, BSP II, RANKL, IL-6, VTNR, CTSK, TRAP, OSCAR, CALCR) and confocal laser scanning microscopy (cell nuclei, actin, CD68, TRAP). Results confirm that ormoHAP embedded in the gelatin matrix enhanced TRAP 5b activity. As a feedback, ALP activity and gene expression of BSP II of osteoblasts increased. Finally, a sequence of cell cross-talk actions is suggested, which can explain the behavior of the formed vital co-culture and moreover the influence of the presence and concentration of ormoHAP.
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Kruppke B, Heinemann C, Wagner AS, Farack J, Wenisch S, Wiesmann HP, Hanke T. Strontium ions promote in vitro human bone marrow stromal cell proliferation and differentiation in calcium-lacking media. Dev Growth Differ 2018; 61:166-175. [PMID: 30585307 DOI: 10.1111/dgd.12588] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 01/07/2023]
Abstract
In order to investigate the influence of calcium and strontium ion concentration on human bone marrow stromal cells and their differentiation to osteoblasts, different cell culture media have been used. Even though this study does not contain a bone substitute material, the reason for this study was the decrease of cation concentration by many biomaterials, due to induced apatite precipitation. As a consequence, the reduced calcium ion concentration is known to affect osteoblastic development. Therefore, the main focus was put on the question, whether an increased strontium concentration (in the range of mM) might be suitable to compensate the lack of calcium ions. The effect of solely strontium ions-with only calcium in the media resulting from fetal calf serum-was investigated. Commercially available calcium-free medium (modified α-MEM) was tested in comparison with media with varied calcium ion concentrations (0.9, 1.8, and 3.6 mM), or strontium ion concentration (0.4, 0.9, 1.8, and 3.6 mM). In case of calcium, higher concentrations cause increased proliferation, while differentiation was shifted to earlier points of time. Differentiation was increased by solely strontium ions only at 0.4-0.9 mM, while proliferation was highest for 0.9-1.8 mM. From these results, it can be concluded that strontium is able to compensate a lack of calcium to a certain degree. Thus, in contrast to calcium ion release, a strontium ion release from bone substitute materials might be applicable for stimulation of bone regeneration without influencing the media saturation.
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Affiliation(s)
- Benjamin Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Christiane Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Alena-Svenja Wagner
- Clinic of Small Animals, c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Gießen, Gießen, Germany.,Institute of Veterinary Physiology and Biochemistry, Justus-Liebig-University Gießen, Gießen, Germany
| | - Jana Farack
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Sabine Wenisch
- Clinic of Small Animals, c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Gießen, Gießen, Germany
| | - Hans-Peter Wiesmann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
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Rößler S, Heinemann C, Kruppke B, Wagner AS, Wenisch S, Wiesmann HP, Hanke T. Manipulation of osteoclastogenesis: Bioactive multiphasic silica/collagen composites and their effects of surface and degradation products. Mater Sci Eng C Mater Biol Appl 2018; 93:265-276. [PMID: 30274058 DOI: 10.1016/j.msec.2018.07.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 05/12/2018] [Accepted: 07/19/2018] [Indexed: 10/28/2022]
Abstract
The intent of the present study was to demonstrate that multiphasic silica/collagen xerogels are able to manipulate cellular processes. These xerogels were prepared by a sol-gel approach allowing the incorporation of mineral phases. The resulting nanocomposites are designed as biomaterial for bone regeneration. Human osteoclasts derived from peripheral blood mononuclear cells were cultured both indirectly and directly, either in presence of different xerogel types or on their surface, to investigate the factor with the main influence on osteoclastogenesis. To this end, the incorporation of a third phase to silica/collagen xerogels was used to affect osteoclastogenesis. In cell culture, ambient ion conditions controlled by both the degradation products of the xerogel and the bioactivity-dependent ion release and reprecipitation were shown to have the main effect on osteoclast specific enzyme tartrate-resistant acid phosphatase (TRAP) 5b. Late stage of osteoclastogenesis characterized by resorption was strongly dependent on the xerogels composition. Surface chemistry of the xerogels was displayed to play an important role in osteoclast resorption. Biphasic silica/collagen xerogels and triphasic xerogels with calcium carbonate offered widespread resorbed areas, whereas hydroxyapatite containing xerogels showed distinctly reduced resorption. The incorporation of strontium carbonate and phosphate, respectively, as third phase changed TRAP 5b activity dose-dependently and inhibited resorption within 21 days. Quantitative evaluation on osteoclast differentiation was carried out using biochemical methods (TRAP 5b, cathepsin K) and was supported by confocal laser scanning microscopy and scanning electron microscopy (SEM). Qualitative estimation of resorption was carried out by SEM.
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Affiliation(s)
- S Rößler
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany.
| | - C Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - B Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - A S Wagner
- Department of Veterinary Clinical Science, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, University Giessen, Frankfurter Str. 98, D-35392 Giessen, Germany
| | - S Wenisch
- Department of Veterinary Clinical Science, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, University Giessen, Frankfurter Str. 98, D-35392 Giessen, Germany
| | - H P Wiesmann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - T Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
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Heinemann C, Schmithausen RM, Sib E, Meyer I, Petersen B, Steinhoff-Wagner J. 512 Preventive effect of nasal lavage with physiologic saline on the colonization with MRSA after working in porcine stable. J Anim Sci 2017. [DOI: 10.2527/asasann.2017.512] [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: 11/13/2022] Open
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Heinemann C, Heinemann S, Kruppke B, Worch H, Thomas J, Wiesmann H, Hanke T. Electric field-assisted formation of organically modified hydroxyapatite (ormoHAP) spheres in carboxymethylated gelatin gels. Acta Biomater 2016; 44:135-43. [PMID: 27544814 DOI: 10.1016/j.actbio.2016.08.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 08/04/2016] [Accepted: 08/16/2016] [Indexed: 10/21/2022]
Abstract
UNLABELLED A biomimetic strategy was developed in order to prepare organically modified hydroxyapatite (ormoHAP) with spherical shape. The technical approach is based on electric field-assisted migration of calcium ions and phosphate ions into a hydrogel composed of carboxymethylated gelatin. The electric field as well as the carboxymethylation using glucuronic acid (GlcA) significantly accelerates the mineralization process, which makes the process feasible for lab scale production of ormoHAP spheres and probably beyond. A further process was developed for gentle separation of the ormoHAP spheres from the gelatin gel without compromising the morphology of the mineral. The term ormoHAP was chosen since morphological analyses using electron microscopy (SEM, TEM) and element analysis (EDX, FT-IR, XRD) confirmed that carboxymethylated gelatin molecules use to act as organic templates for the formation of nanocrystalline HAP. The hydroxyapatite (HAP) crystals self-organize to form hollow spheres with diameters ranging from 100 to 500nm. The combination of the biocompatible chemical composition and the unique structure of the nanocomposites is considered to be a useful basis for future applications in functionalized degradable biomaterials. STATEMENT OF SIGNIFICANCE A novel bioinspired mineralization process was developed based on electric field-assisted migration of calcium and phosphate ions into biochemically carboxymethylated gelatin acting as organic template. Advantages over conventional hydroxyapatite include particle size distribution and homogeneity as well as achievable mechanical properties of relevant composites. Moreover, specifically developed calcium ion or phosphate ion release during degradation can be useful to adjust the fate of bone cells in order to manipulate remodeling processes. The hollow structure of the spheres can be useful for embedding drugs in the core, encapsulated by the highly mineralized outer shell. In this way, controlled drug release could be achieved, which enables advanced strategies for threating bone-related diseases, e.g. osteoporosis and multiple myeloma.
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Glenske K, Wagner AS, Hanke T, Cavalcanti-Adam EA, Heinemann S, Heinemann C, Kruppke B, Arnhold S, Moritz A, Schwab EH, Worch H, Wenisch S. Bioactivity of xerogels as modulators of osteoclastogenesis mediated by connexin 43. Biomaterials 2014; 35:1487-95. [DOI: 10.1016/j.biomaterials.2013.11.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 11/01/2013] [Indexed: 12/18/2022]
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Heinemann S, Heinemann C, Wenisch S, Alt V, Worch H, Hanke T. Erratum to: “Calcium phosphate phases integrated in silica/collagen nanocomposite xerogels enhance the bioactivity and ultimately manipulate the osteoblast/osteoclast ratio in a human co-culture model” [Acta Biomaterialia 9 (2013) 4878–4888]. Acta Biomater 2013. [DOI: 10.1016/j.actbio.2013.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Toskas G, Heinemann S, Heinemann C, Cherif C, Hund RD, Roussis V, Hanke T. Ulvan and ulvan/chitosan polyelectrolyte nanofibrous membranes as a potential substrate material for the cultivation of osteoblasts. Carbohydr Polym 2012; 89:997-1002. [PMID: 24750891 DOI: 10.1016/j.carbpol.2012.04.045] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 04/12/2012] [Accepted: 04/16/2012] [Indexed: 10/28/2022]
Abstract
A new generation of biomaterials composed of the natural polysaccharides, ulvans extracted from the green seaweed Ulva rigida and chitosan have been investigated. Ulvan, chitosan alone and ulvan/chitosan polyelectrolyte membranes have been synthesised and characterised. The structure of the membranes was altered by the weight ratio of the polyion components. Fibrous and nanofibrous morphology was created, in accordance with a supramolecular self assembly. ATR-FTIR measurements suggested the presence of both polycationic chitosan and polyanionic ulvan in the polyelectrolyte membranes. The cytocompatibility of these new materials was examined by fluorescence microscopy. The results show that ulvan as well as ulvan/chitosan membranes promoted the attachment and proliferation of 7F2 osteoblasts and maintained the cell morphology and viability. Thus, ulvan and chitosan which possess unique properties might have high impact in biomedical applications as potential scaffold materials.
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Affiliation(s)
- Georgios Toskas
- Institute of Textile Machinery and High Performance Material Technology (ITM), Dresden University of Technology, Hohestr. 6, 01069 Dresden, Germany
| | - Sascha Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, 01069 Dresden, Germany
| | - Christiane Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, 01069 Dresden, Germany
| | - Chokri Cherif
- Institute of Textile Machinery and High Performance Material Technology (ITM), Dresden University of Technology, Hohestr. 6, 01069 Dresden, Germany
| | - Rolf-Dieter Hund
- Institute of Textile Machinery and High Performance Material Technology (ITM), Dresden University of Technology, Hohestr. 6, 01069 Dresden, Germany
| | - Vassilios Roussis
- University of Athens, School of Pharmacy, Department of Pharmacognosy and Chemistry of Natural Products, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, 01069 Dresden, Germany
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Heinemann S, Heinemann C, Jäger M, Neunzehn J, Wiesmann HP, Hanke T. Effect of silica and hydroxyapatite mineralization on the mechanical properties and the biocompatibility of nanocomposite collagen scaffolds. ACS Appl Mater Interfaces 2011; 3:4323-4331. [PMID: 21942510 DOI: 10.1021/am200993q] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A recently established materials concept of biomimetic composites based on silica, collagen, and calcium phosphates was adapted for the preparation of porous scaffolds suitable for tissue engineering applications. Mineralization was achieved by directed nucleation of silica on the templating organic phase during a sol-gel process with or without addition of hydroxyapatite. Both mineral phases (25 wt %, individually or combined in equal shares) influenced the scaffold's morphology at the nanoscale. Enhancement of apparent density and compressive strength was similar for silica or hydroxyapatite mineralization; however the stiffening effect of hydroxyapatite was much higher. All scaffold modifications provided proper conditions for adhesion, proliferation, and osteogenic differentiation of human bone marrow stromal cells. The open porosity allowed cells to migrate throughout the scaffolds while maintaining their viability, both confirmed by MTT staining and confocal laser scanning microscopy. Initial cell distributions were graduated due to collagen mineralization, but balanced out over the cultivation time of 28 days. RT-PCR analyses revealed higher gene expression of ALP but lower expression of BSP II and osteocalcin because of collagen mineralization. The results demonstrate that both silica and hydroxyapatite offer comparable possibilities to tailor mechanical properties of collagen-based scaffolds without being detrimental to in vitro biocompatibility.
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Affiliation(s)
- S Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Budapester Strasse 27, D-01069 Dresden, Germany.
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Heinemann C, Heinemann S, Worch H, Hanke T, Hanke T. Development of an osteoblast/osteoclast co-culture derived by human bone marrow stromal cells and human monocytes for biomaterials testing. Eur Cell Mater 2011; 21:80-93. [PMID: 21267944 DOI: 10.22203/ecm.v021a07] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The communication of bone-forming osteoblasts and bone-resorbing osteoclasts is a fundamental requirement for balanced bone remodelling. For biomaterial research, development of in vitro models is necessary to investigate this communication. In the present study human bone marrow stromal cells and human monocytes were cultivated in order to differentiate into osteoblasts and osteoclasts, respectively. Finally, a cultivation regime was identified which firstly induces the differentiation of the human bone marrow stromal cells followed by the induction of osteoclastogenesis through the osteoblasts formed--without the external addition of the factors RANKL and M-CSF. As a feedback on osteoblasts enhanced gene expression of BSP II was detected for modifications which facilitated the formation of large multinuclear osteoclasts. Phenotype characterization was performed by biochemical methods (DNA, LDH, ALP, TRAP 5b), gene expression analysis (ALP, BSP II, RANKL, IL-6, VTNR, CTSK, TRAP, OSCAR, CALCR) as well as light microscopy, confocal laser scanning microscopy, and scanning electron microscopy. After establishing this model on polystyrene, similar positive results were obtained for cultivation on a relevant bone substitution material--a composite xerogel of silica, collagen, and calcium phosphate.
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Affiliation(s)
- C Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, D-01069 Dresden,
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Vater C, Lode A, Bernhardt A, Reinstorf A, Heinemann C, Gelinsky M. Influence of different modifications of a calcium phosphate bone cement on adhesion, proliferation, and osteogenic differentiation of human bone marrow stromal cells. J Biomed Mater Res A 2010; 92:1452-60. [PMID: 19373921 DOI: 10.1002/jbm.a.32469] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Collagen and noncollagenous proteins of the extracellular bone matrix are able to stimulate bone cell activities and bone healing. The modification of calcium phosphate bone cements used as temporary bone replacement materials with these proteins seems to be a promising approach to accelerate new bone formation. In this study, we investigated adhesion, proliferation, and osteogenic differentiation of human bone marrow stromal cells (hBMSC) on Biocement D/collagen composites which have been modified with osteocalcin and O-phospho-L-serine. Modification with osteocalcin was carried out by its addition to the cement precursor before setting as well as by functionalization of the cement samples after setting and sterilization. hBMSC were cultured on these samples for 28 days with and without osteogenic supplements. We found a positive impact especially of the phosphoserine-modifications but also of both osteocalcin-modifications on differentiation of hBMSC indicated by higher expression of the osteoblastic markers matrix metalloproteinase-13 and bone sialo protein II. For hBMSC cultured on phosphoserine-containing composites, an increased proliferation has been observed. However, in case of the osteocalcin-modified samples, only osteocalcin adsorbed after setting and sterilization of the cement samples was able to promote initial adhesion and proliferation of hBMSC. The addition of osteocalcin before setting results in a finer microstructure but the biological activity of osteocalcin might be impaired due to the sterilization process. Thus, our data indicate that the initial adhesion and proliferation of hBMSC is enhanced rather by the biological activity of osteocalcin than by the finer microstructure.
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Affiliation(s)
- Corina Vater
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Institute of Materials Science, Dresden, Germany
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Abstract
Textile chitosan fibre scaffolds were evaluated in terms of interaction with osteoclast-like cells, derived from human primary monocytes. Part of the scaffolds was further modified by coating with fibrillar collagen type I in order to make the surface biocompatible. Monocytes were cultured directly on the scaffolds in the presence of macrophage colony stimulating factor (M-CSF) and receptor activator of nuclear factor kappaB ligand (RANKL) for up to 18 days. Confocal laser scanning microscopy (CLSM) as well as scanning electron microscopy (SEM) revealed the formation of multinuclear osteoclast-like cells on both the raw chitosan fibres and the collagen-coated scaffolds. The modified surface supported the osteoclastogenesis. Differentiation towards the osteoclastic lineage was confirmed by the microscopic detection of cathepsin K, tartrate resistant acid phosphatase (TRAP), acidic compartments using 3-(2,4-dinitroanillino)-3'-amino-N-methyldipropylamine (DAMP), immunological detection of TRAP isoform 5b, and analysis of gene expression of the osteoclastic markers TRAP, cathepsin K, vitronectin receptor, and calcitonin receptor using reverse transcription-polymerase chain reaction (RT-PCR). The feature of the collagen-coated but also of the raw chitosan fibre scaffolds to support attachment and differentiation of human monocytes facilitates cell-induced material resorption--one main requirement for successful bone tissue engineering.
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Affiliation(s)
- C Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany.
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Nair MB, Bernhardt A, Lode A, Heinemann C, Thieme S, Hanke T, Varma H, Gelinsky M, John A. A bioactive triphasic ceramic-coated hydroxyapatite promotes proliferation and osteogenic differentiation of human bone marrow stromal cells. J Biomed Mater Res A 2009; 90:533-42. [PMID: 18563821 DOI: 10.1002/jbm.a.32114] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Hydroxyapatite (HA) ceramics are widely used as bone graft substitutes because of their biocompatibility and osteoconductivity. However, to enhance the success of therapeutic application, many efforts are undertaken to improve the bioactivity of HA. We have developed a triphasic, silica-containing ceramic-coated hydroxyapatite (HASi) and evaluated its performance as a scaffold for cell-based tissue engineering applications. Human bone marrow stromal cells (hBMSCs) were seeded on both HASi and HA scaffolds and cultured with and without osteogenic supplements for a period of 4 weeks. Cellular responses were determined in vitro in terms of cell adhesion, viability, proliferation, and osteogenic differentiation, where both materials exhibited excellent cytocompatibility. Nevertheless, an enhanced rate of cell proliferation and higher levels of both alkaline phosphatase expression and activity were observed for cells cultured on HASi with osteogenic supplements. These findings indicate that the bioactivity of HA endowed with a silica-containing coating has definitely influenced the cellular activity, projecting HASi as a suitable candidate material for bone regenerative therapy.
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Affiliation(s)
- Manitha B Nair
- Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojapura P.O., Thiruvananthapuram, Kerala, India
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Heinemann S, Heinemann C, Bernhardt R, Reinstorf A, Nies B, Meyer M, Worch H, Hanke T. Bioactive silica-collagen composite xerogels modified by calcium phosphate phases with adjustable mechanical properties for bone replacement. Acta Biomater 2009; 5:1979-90. [PMID: 19345651 DOI: 10.1016/j.actbio.2009.02.029] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [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: 10/03/2008] [Revised: 01/06/2009] [Accepted: 02/03/2009] [Indexed: 11/29/2022]
Abstract
The development of composites has been recognized as a promising strategy to fulfil the complex requirements of biomaterials. The present study reports on the modification of a novel silica-collagen composite material by varying the inorganic/organic mass ratio and introducing calcium phosphate cement (CPC) as a third component. The sol-gel technique is used for processing, followed by xerogel formation under specific temperature and relative humidity conditions. Cylindrical monolithic samples up to 400mm(3) were obtained without any sintering processes. Various hierarchical phases of the organic component were applied, ranging from tropocollagen and collagen fibrils up to collagen fibers, each characterized by atomic force microscopy. Focusing on the application of fibrils, various inorganic/organic mass ratios were used: 100/0, 85/15 and 70/30; their influence on the structure of the composite material was demonstrated by scanning electron microscopy. The composition was extended by the addition of 25wt.% CPC which led to increased bioactivity by accelerating the formation of bone apatite layers in simulated body fluid. Synchrotron microcomputed tomography demonstrated the homogeneous distribution of the cement particles in the silica-collagen matrix. Compressive strength tests showed that the mechanical properties of the brittle pure silica gel are changed significantly due to collagen addition. The highest ultimate strength of about 115MPa at about 18% total strain was registered for the 70/30 silica-collagen composite xerogels. Incorporation of CPC lowered the gel's strength. By demonstrating differentiation of human monocytes into osteoclast-like cells, an important feature of the composite material regarding successful bone remodeling is fulfilled.
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Affiliation(s)
- Sascha Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Germany.
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Heinemann C, Heinemann S, Lode A, Bernhardt A, Worch H, Hanke T. In Vitro Evaluation of Textile Chitosan Scaffolds for Tissue Engineering using Human Bone Marrow Stromal Cells. Biomacromolecules 2009; 10:1305-10. [DOI: 10.1021/bm900172m] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Christiane Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Strasse 27, D-01069 Dresden, Germany
| | - Sascha Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Strasse 27, D-01069 Dresden, Germany
| | - Anja Lode
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Strasse 27, D-01069 Dresden, Germany
| | - Anne Bernhardt
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Strasse 27, D-01069 Dresden, Germany
| | - Hartmut Worch
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Strasse 27, D-01069 Dresden, Germany
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Strasse 27, D-01069 Dresden, Germany
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Heinemann C, Heinemann S, Bernhardt A, Worch H, Hanke T. Novel Textile Chitosan Scaffolds Promote Spreading, Proliferation, and Differentiation of Osteoblasts. Biomacromolecules 2008; 9:2913-20. [DOI: 10.1021/bm800693d] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christiane Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany
| | - Sascha Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany
| | - Anne Bernhardt
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany
| | - Hartmut Worch
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Dresden University of Technology, Budapester Str. 27, D-01069 Dresden, Germany
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Affiliation(s)
- M. Frick
- Sanofi-Aventis Deutschland, Potsdamer Str. 8, 10785 Berlin, Germany
| | - J. Knollmeyer
- Sanofi-Aventis Deutschland, Potsdamer Str. 8, 10785 Berlin, Germany
| | - H. Riederer
- Sanofi-Aventis Deutschland, Potsdamer Str. 8, 10785 Berlin, Germany
| | - C. Heinemann
- Sanofi-Aventis Deutschland, Potsdamer Str. 8, 10785 Berlin, Germany
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Heinemann S, Ehrlich H, Douglas T, Heinemann C, Worch H, Schatton W, Hanke T. Ultrastructural Studies on the Collagen of the Marine SpongeChondrosia reniformisNardo. Biomacromolecules 2007; 8:3452-7. [DOI: 10.1021/bm700574y] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fuchs SM, Heinemann C, Schliemann-Willers S, Härtl H, Fluhr JW, Elsner P. Assessment of anti-inflammatory activity of Poria cocos in sodium lauryl sulphate-induced irritant contact dermatitis. Skin Res Technol 2007; 12:223-7. [PMID: 17026651 DOI: 10.1111/j.0909-752x.2006.00168.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE In the present study, we evaluated the anti-inflammatory activity of Poria cocos (PoCo) on experimentally induced irritant contact dermatitis (ICD) in a repeated sodium lauryl sulphate (SLS) irritation model. METHODS The anti-irritative effect of PoCo was evaluated with a visual score and quantified by non-invasive bioengineering methods, namely chromametry and transepidermal water loss. Three concentrations of PoCo in base cream DAC (amphiphilic emollient; German pharmacopoeia) were tested in a 4-day repetitive irritation test using SLS. RESULTS A statistically significant anti-inflammatory activity was observed for PoCo by all three methods when applied in parallel to the induction period of ICD. Application of PoCo after induction of ICD once a day for 5 days, starting just at the end of 4 days, was without any effect. CONCLUSION An anti-inflammatory efficacy of PoCo on the elicitation phase of the ICD induced by repeated SLS test could be observed and quantified by three independent, non-invasive biophysical assessment parameters. This effect can be explained by its influence on pro-inflammatory enzymes, namely phospholipase A2.
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Affiliation(s)
- S M Fuchs
- Department of Dermatology, Friedrich-Schiller-University Jena, Jena, Germany
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Heinemann C, Fischer T, Barta U, Michaelides A, Elsner P. Plasma cell mucositis with oral and genital involvement - successful treatment with topical cyclosporin. J Eur Acad Dermatol Venereol 2006; 20:739-40. [PMID: 16836510 DOI: 10.1111/j.1468-3083.2006.01467.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kappes U, Schliemann-Willers S, Bankova L, Heinemann C, Fischer TW, Ziemer M, Schubert H, Norgauer J, Fluhr JW, Elsner P. The quality of human skin xenografts on SCID mice: a noninvasive bioengineering approach. Br J Dermatol 2004; 151:971-6. [PMID: 15541074 DOI: 10.1111/j.1365-2133.2004.06191.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Animal models are important tools for studies in skin physiology and pathophysiology. Due to substantial differences in skin characteristics such as thickness and number of adnexa, the results of animal studies cannot always be directly transferred to the human situation. Therefore, transplantation of human skin on to SCID (severe combined immunodeficiency) mice might offer a promising tool to perform studies in viable human skin without the direct need for human volunteers. OBJECTIVES To characterize the physiological and anatomical changes of a human skin transplant on a SCID animal host. METHODS In this study human skin was transplanted on to 32 SCID mice and followed for 6 months. Barrier function was assessed by transepidermal water loss (TEWL; tewametry) and moisture content of the stratum corneum was studied by measurement of electrical capacitance (corneometry). RESULTS The results showed considerable deviations of TEWL values and skin hydration between the grafts and human skin in vivo. The human skin showed epidermal hyperkeratosis and moderate sclerosis of the corium 4 and 6 months after transplantation on to SCID mice. CONCLUSIONS Our results indicate that human skin does not completely preserve its physiological and morphological properties after transplantation on to SCID mice. Therefore, results from experiments using this model system need to be discussed cautiously.
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Affiliation(s)
- U Kappes
- Department of Dermatology and Allergology, Friedrich-Schiller-University, Erfurter Strasse 35, D-07743 Jena, Germany
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Krudwig WK, Schulte KK, Heinemann C. Intra-articular ganglion cysts of the knee joint: a report of 85 cases and review of the literature. Knee Surg Sports Traumatol Arthrosc 2004; 12:123-9. [PMID: 14504717 DOI: 10.1007/s00167-003-0372-9] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2002] [Accepted: 03/01/2003] [Indexed: 11/24/2022]
Abstract
Intra-articular ganglia and cysts of the knee joint are rare and mostly incidental findings in MRI and arthroscopy. During a period of 15 years, nearly 8000 knees were arthroscopically examined. In total, 85 intra-articular soft tissue masses were found within the knee cavity. Of these, 76 were incidental and asymptomatic findings in arthroscopy performed for treatment of osteoarthritic symptoms. Several repeated minor knee traumata were reported in this group but no histories of serious traumatic events. Nine ganglion cysts were obviously solely responsible for the intermittent or chronic non-specific knee discomfort, and classified as symptomatic. There were no histories of previous injury to the knees, no clinical signs of instabilities or meniscal and femoropatellar pathologies, and no associated further intra-articular lesions in arthroscopy. Forty-nine cystic masses originated from the ACL, 16 from the PCL, 12 from the anterior (eight medial, four lateral) and three from the posterior horn of the menisci (two medial, one lateral). Three were located in the infrapatellar fat pad, one arose from a medial plica and one from a subchondral bone cyst. All ganglion cysts were successfully resected or excised using arthroscopic technique. A review of the literature is given and compared with the findings and data of this study.
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Affiliation(s)
- W K Krudwig
- Marienhospital, Von-Doste-Strasse 14, 59597, Erwitte, Germany.
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Abstract
Erythema induratum of Bazin (EIB) is considered a tuberculide reaction and consists of recurrent painful nodules predominantly on the calves. Clinically it has common features with diseases like nodular vasculitis, perniosis, polyarteritis nodosa and erythema nodosum. Poncet's disease is a reactive arthritis that may accompany tuberculosis. We report a case of a young woman in which the simultaneous occurrence of erythema induratum of Bazin and Poncet's disease led to a clinical picture very similar to Löfgren's syndrome. The final diagnosis was obtained by polymerase chain reaction detection of mycobacterial DNA in a skin biopsy. A systemic therapy with tuberculostatic drugs led to the disappearance of symptoms. The presented case shows the usefulness of polymerase chain reaction diagnostics in EIB patients without other clinical signs of tuberculosis and a confusing combination of symptoms, and further confirms the presence of mycobacterial DNA in EIB lesions.
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Affiliation(s)
- C Heinemann
- Department of Dermatology and Dermatological Allergology, University-Hospitals of the Friedrich Schiller University Jena, Erfurterstr. 35, 07740 Jena, Germany
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Heinemann C, Elsner P. Efficacy measurement of topical antihistamines: a review. Skin Pharmacol Physiol 2003; 16:4-11. [PMID: 12566823 DOI: 10.1159/000068292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2001] [Indexed: 11/19/2022]
Abstract
More and more antihistamines are used in gels or ointments for local antipruritic therapy. Among other factors, the efficacy is dependent on the penetration properties of the respective agents and the optimal choice of vehicle substances. To avoid expensive treatment with unsatisfying success, a reliable efficacy measurement would be desirable prior to the admission of new topical antihistamine preparations. Therefore we reviewed the literature for common methods to assess the efficacy of local antihistamines in healthy volunteers. The principle is to apply the test substance to marked test areas and to challenge the skin after a certain time with a standardised amount of histamine, allergens or mast-cell-degranulating substances. For the test evaluation, the areas of wheal, flare and itch are measured and compared between antihistamine-treated and control fields. Challenge models and most of the described evaluation methods are suited for the preliminary efficacy measurement of antihistamines. However, to be able to compare the results, a standardised procedure used by all investigators would be desirable.
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Affiliation(s)
- C Heinemann
- Departement of Dermatology, Friedrich Schiller University of Jena, Jena, Germany.
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Heinemann C, Schliemann-Willers S, Kelterer D, Metzner U, Kluge K, Wigger-Alberti W, Elsner P. The atopy patch test -- reproducibility and comparison of different evaluation methods. Allergy 2002; 57:641-5. [PMID: 12100307 DOI: 10.1034/j.1398-9995.2002.23438.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND There is still a lack of standardization of the atopy patch test (APT) in test procedures and evaluation methods. Our aim was to examine the reproducibility of APT results and to compare visual evaluation to chromametry and laser Doppler imaging. METHODS Fifty-two volunteers with atopic eczema/dermatitis syndrome (AEDS) were included. The APT was performed on tape-stripped and unstripped test fields on their backs using cat dander, house dust mite and grass pollen allergens from two different suppliers. Responders were re-tested 4-12 weeks later with the same allergens on their forearms. RESULTS Using Allergopharma allergens, 14 (26.9%) volunteers showed one or more positive reactions. The reproducibility rate was 56.3%. The Erlangen atopy score in APT-positive and negative volunteers was 19 +/- 6 vs 15 +/- 6. The test agreement in volunteers tested with both allergens, from Allergopharma and Stallergènes, was poor. Correlation of the results between the three evaluation methods was significant (P < or = 0.001). CONCLUSIONS The low reproducibility rate of APT results and the poor inter-test-agreement using allergens from different suppliers show that much work remains to make the APT a reliable tool in identifying relevant aeroallergens that lead to flare ups of AEDS. Compared to chromametry and laser Doppler imaging, visual scoring was superior in differentiation between irritative and allergic reactions.
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Affiliation(s)
- C Heinemann
- Department of Dermatology adn Allergology, University-Hospitals of the Friedrich Schiller University Jena, Germany
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Abstract
Tacrolimus (FK 506) is a macrolide discovered in 1984 as a metabolic product of Streptomyces tsukabaensis. It has been used successfully in treating atopic dermatitis, allergic contact dermatitis, lichen planus mucosae and pyoderma gangrenosum. In the present study, we evaluated the anti-inflammatory activity of FK 506 in 2 human skin inflammation models. FK 506 as Protopic(R) cream was tested (i) in a 4-day repetitive irritation test with 2 x daily application of sodium lauryl sulphate (SLS), and (ii) in a UVB erythema model. The effect was evaluated visually and quantified by non-invasive bioengineering methods, namely chromametry and tewametry (TEWL). When FK 506 was applied 30 min after SLS irritation, an increased inflammation in comparison to controls was observed with all 3 methods, with only the TEWL data reaching statistical significance. 1 x daily application of FK 506 for 5 days, starting at the end of the 4-day irritation period, was without any effect. Similarly, no effect of FK 506 was seen in the UVB model. In conclusion, FK 506 was shown to enhance experimentally induced irritant contact dermatitis and not to accelerate healing of irritant contact dermatitis and UVB erythema.
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Affiliation(s)
- M Fuchs
- Department of Dermatology, Friedrich-Schiller-University, Jena, Germany.
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Gassel F, Schmitz A, Koenig R, Jaeger U, Heinemann C, Schmitt O. [Calculation of 3-D deformity in scoliosis by MRI of the total spine in two perpendicular reconstructed planes]. Z Orthop Ihre Grenzgeb 2002; 140:165-70. [PMID: 12029588 DOI: 10.1055/s-2002-31535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AIM Scoliosis is a spinal deformity that is more complex and does not exist in one plane only. There have been many attempts to analyse three-dimensional spinal deformity, however, these procedures necessitate higher radiation doses. METHOD In this study we define angles according to the Cobb Definition. By means of trigonometrical evaluation, 3D calculation of spinal deformity is demonstrated using MRI of the total spine in two reconstructed perpendicular planes. 3D spinal analysis was performed on 41 female and 7 male patients with scoliosis. RESULTS 79 angles were measured by using the Cobb angle in reconstructed coronal plane of MRI of the total spine and, in addition, by using our method. The scoliosis Cobb angles ranged from 11 - 59 degrees (mean: 23 degrees +/- 9 degrees ), the real angles ranged from 12 - 70 degrees (mean: 32 +/- 14 degrees ). There was a poor correlation between Cobb angles and the 3D calculated angles (r = 0.37; p < 0.0001). CONCLUSION Our method enables us to determine the real angle of scoliosis and to avoid techniques with any radiation risk for the patient.
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Affiliation(s)
- F Gassel
- Klinik und Poliklinik für Orthopädie der Rhein. Friedr.-Wilh.-Universität Bonn, Germany.
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Schenker S, Heinemann C, Huber M, Pompizzi R, Perren R, Escher R. Impact of Roasting Conditions on the Formation of Aroma Compounds in Coffee Beans. J Food Sci 2002. [DOI: 10.1111/j.1365-2621.2002.tb11359.x] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.5] [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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Abstract
Forty-two healthy women were randomized to receive one of three encapsulated Lactobacillus rhamnosus GR-1 plus Lactobacillus fermentum RC-14 probiotic dosage regimens or L. rhamnosus GG by mouth each day for 28 days. However, the vaginal flora, assessed by Nugent scoring, was only normal in 40% of the cases, and 14 patients had asymptomatic bacterial vaginosis. Treatment with L. rhamnosus GR-1/L. fermentum RC-14 once and twice daily correlated with a healthy vaginal flora in up to 90% of patients, and 7/11 patients with bacterial vaginosis converted to normal or intermediate scores within 1 month. Ingestion of L. rhamnosus GG failed to have an effect. This study confirms the potential efficacy of orally administered lactobacilli as a non-chemotherapeutic means to restore and maintain a normal urogenital flora, and shows that over 10(8) viable organisms per day is the required dose.
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Affiliation(s)
- G Reid
- H414, Lawson Health Research Institute, University of Western Ontario, London, ON, Canada.
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Kappes UP, Göritz N, Wigger-Alberti W, Heinemann C, Elsner P. Tandem application of sodium lauryl sulfate and n-propanol does not lead to enhancement of cumulative skin irritation. Acta Derm Venereol 2001; 81:403-5. [PMID: 11859941 DOI: 10.1080/000155501317208327] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
Irritant contact dermatitis has a broad spectrum of clinical features and is a leading cause of occupational disease worldwide. It has been shown previously that a combination of chemically different irritants may cause an additive effect compared to single application of these substances. In this study, tandem application of sodium lauryl sulfate and n-propanol was investigated in 20 human volunteers using non-invasive bioengineering methods, such as measurement of transepidermal water loss and chromametry. N-propanol did not enhance cumulative skin irritation when used with sodium lauryl sulfate, as has been reported for toluene. As n-propanol is the active ingredient in many disinfectants, this is of particular interest regarding occupational skin irritation in health care workers.
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Affiliation(s)
- U P Kappes
- Department of Dermatology, Friedrich-Schiller-University, Jena, Germany.
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Affiliation(s)
- G Reid
- Lawson Health Research Institute, St. Joseph's Health Centre, and Departments of Microbiology and Immunology, and Surgery, University of Western Ontario, London, Ontario N6A 4V2, Canada
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Abstract
Starch, in particular the linear amylose, is able to form inclusion complexes with a wide spectrum of ligand molecules, among them flavor compounds. The complexing ability of a homologous series of gamma- and delta-lactones with potato starch was followed by amperometric iodine titration, differential scanning calorimetry, and wide-angle X-ray diffraction measurements. Lactones with a linear chain of a size > or = C(5) form inclusion complexes with starch, whereas lactones with a short linear chain, such as gamma-heptalactone, show poor complexing ability. The thermal stability of starch-lactone complexes increases with increasing chain length of the lactone. In general, lactones induce the formation of V(h) helices. Only delta-decalactone complexes with starch were not definitely identified as V(h) amylose helices. Complexation of starch dispersions with lactones induce turbidity and gelation or phase separation, both phenomena being the result of microphase separation.
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Affiliation(s)
- C Heinemann
- Swiss Federal Institute of Technology (ETH) Zurich, Institute of Food Science, CH-8092 Zurich, Switzerland
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