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Gronbach M, Mitrach F, Lidzba V, Müller B, Möller S, Rother S, Salbach-Hirsch J, Hofbauer LC, Schnabelrauch M, Hintze V, Hacker MC, Schulz-Siegmund M. Scavenging of Dickkopf-1 by macromer-based biomaterials covalently decorated with sulfated hyaluronan displays pro-osteogenic effects. Acta Biomater 2020; 114:76-89. [PMID: 32673749 DOI: 10.1016/j.actbio.2020.07.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/18/2020] [Accepted: 07/08/2020] [Indexed: 12/27/2022]
Abstract
Dickkopf-1 (DKK1), a Wnt inhibitor secreted by bone marrow stromal cells (MSC), is known to play an important role in long-term non-union bone fracture defects and glucocorticoid induced osteoporosis. Mitigating its effects in early bone defects could improve osteogenesis and bone defect healing. Here, we applied a biomaterial strategy to deplete a defect environment from DKK1 by scavenging the protein via a macromer-based biomaterial covalently decorated with sulfated hyaluronan (sHA3). The material consisted of cross-copolymerized three-armed macromers with a small anchor molecule. Using the glycidyl anchor, polyetheramine (ED900) could be grafted to the material to which sHA3 was efficiently coupled in a separate step. For thorough investigation of material modification, flat material surfaces were generated by fabricating them on glass discs. The binding capability of sHA3 for DKK1 was demonstrated in this study by surface plasmon resonance measurements. Furthermore, the surfaces demonstrated the ability to scavenge and inactivate pathologic amounts of DKK1 from complex media. In a combinatory approach with Wnt3a, we were able to demonstrate that DKK1 is the preferred binding partner of our sHA3-functionalized surfaces. We validated our findings in a complex in vitro setting of differentiating SaOS-2 cells and primary hMSC. Here, endogenous DKK-1 was scavenged resulting in increased osteogenic differentiation indicating that this is a consistent biological effect irrespective of the model system used. Our study provides insights in the mechanisms and efficiency of sHA3 surface functionalization for DKK1 scavenging, which may be used in a clinical context in the future.
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Affiliation(s)
- M Gronbach
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - F Mitrach
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - V Lidzba
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - B Müller
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - S Möller
- INNOVENT e.V., Biomaterials Department, Pruessingstraße 27B, Jena, Germany
| | - S Rother
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, 01062 Dresden, Germany
| | - J Salbach-Hirsch
- Department of Medicine III, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - L C Hofbauer
- Department of Medicine III, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany; Center for Healthy Aging, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - M Schnabelrauch
- INNOVENT e.V., Biomaterials Department, Pruessingstraße 27B, Jena, Germany
| | - V Hintze
- Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, 01062 Dresden, Germany
| | - M C Hacker
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany
| | - M Schulz-Siegmund
- University of Leipzig, Medical Faculty, Pharmaceutical Technology, Eilenburger Str. 15A, 04317 Leipzig, Germany.
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2
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Korn P, Kramer I, Schlottig F, Tödtman N, Eckelt U, Bürki A, Ferguson SJ, Kautz A, Schnabelrauch M, Range U, Kneissel M, Stadlinger B, Stadlinger B. Systemic sclerostin antibody treatment increases osseointegration and biomechanical competence of zoledronic-acid-coated dental implants in a rat osteoporosis model. Eur Cell Mater 2019; 37:333-346. [PMID: 31112281 DOI: 10.22203/ecm.v037a20] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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
Osseointegration of dental implants can be promoted by implant-surface modifications using bisphosphonate coatings. In addition, it is of clinical interest to promote peri-implant bone formation and to restore bony structure in low bone-mass patients. The present study evaluated a combination of an anti-resorptive zoledronic acid (ZOL) implant-coating and a systemically applied sclerostin antibody, a known bone anabolic treatment principle, versus sole sclerostin antibody treatment or ZOL implant-coating in a rat osteoporosis model. Uncoated reference surface implants or ZOL-coated implants (n = 64/group) were inserted into the proximal tibia of aged osteoporotic rats three months following ovariectomy. 32 animals of each group received once weekly sclerostin antibody therapy. Osseointegration was assessed 2 or 4 weeks post-implantation by ex vivo µCT, histology and biomechanical testing. Overall implant survival rate was 97 %. Histomorphology revealed pronounced bone formation along the entire implant length of ZOL-coated implants. At 4 weeks following implant insertion, bone-implant contact, cancellous bone mineral density and bone volume/tissue volume were significantly increased for the combination of ZOL and sclerostin antibody as compared to sclerostin antibody or ZOL implant-coating alone. Removal torque was also significantly increased in the combination therapy group relative to animals receiving only sclerostin antibody therapy or ZOL-coated implants. In an osteoporotic rat model, the combination of anti-resorptive ZOL implant-coating and systemically applied sclerostin antibody led to significantly increased peri-implant bone formation. Therefore, the combination of ZOL and the osteoanabolic sclerostin antibody was more effective than either agent alone.
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Affiliation(s)
- P Korn
- Department of Oral and Maxillofacial Surgery, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Augustenburger Platz 1, 13353 Berlin,
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3
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Sigusch BW, Dietsch S, Berg A, Voelpel A, Guellmar A, Rabe U, Schnabelrauch M, Steen D, Gitter B, Albrecht V, Watts DC, Kranz S. Antimicrobial photodynamic active biomaterials for periodontal regeneration. Dent Mater 2018; 34:1542-1554. [PMID: 29970234 DOI: 10.1016/j.dental.2018.06.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 04/13/2018] [Revised: 06/18/2018] [Accepted: 06/18/2018] [Indexed: 02/09/2023]
Abstract
OBJECTIVE Biomaterials for periodontal regeneration may have insufficient mechanical and antimicrobial properties or are difficult to apply under clinical conditions. The aim of the present study was to develop a polymeric bone grafting material of suitable physical appearance and antimicrobial photodynamic activity. METHODS Two light curable biomaterials based on urethane dimethacrylate (BioM1) and a tri-armed oligoester-urethane methacrylate (BioM2) that additionally contained a mixture of β-tricalcium phosphate microparticles and 20wt% photosensitizer mTHPC (PS) were fabricated and analyzed by their compressive strength, flexural strength and modulus of elasticity. Cytotoxicity was observed by incubating eluates and in direct-contact to MC3T3-E1 cells. Antimicrobial activity was ascertained on Porphyromonas gingivalis and Enterococcus faecalis upon illumination with laser light (652nm, 1×100J/cm2, 2×100J/cm2). RESULTS The compressive strength, flexural strength and elastic modulus were, respectively, 311.73MPa, 22.81MPa and 318.85MPa for BioM1+PS and 742.37MPa, 7.58MPa and 406.23MPa for BioM2+PS. Both materials did not show any cytotoxic behavior. Single laser-illumination (652nm) caused total suppression of P. gingivalis (BioM2+PS), while repeated irradiation reduced E. faecalis by 3.7 (BioM1+PS) and 3.1 (BioM2+PS) log-counts. SIGNIFICANCE Both materials show excellent mechanical and cytocompatible properties. In addition, irradiation with 652nm induced significant bacterial suppression. The manufactured biomaterials might enable a more efficient cure of periodontal bone lesions. Due to the mechanical properties functional stability might be increased. Further, the materials are antimicrobial upon illumination with light that enables a trans-mucosal eradication of residual pathogens.
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Affiliation(s)
- B W Sigusch
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - S Dietsch
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - A Berg
- Biomaterials Department, INNOVENT e.V. Pruessingstrasse 27 B, 07745 Jena, Germany
| | - A Voelpel
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - A Guellmar
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - U Rabe
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany
| | - M Schnabelrauch
- Biomaterials Department, INNOVENT e.V. Pruessingstrasse 27 B, 07745 Jena, Germany
| | - D Steen
- biolitec research GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany
| | - B Gitter
- biolitec research GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany
| | - V Albrecht
- biolitec research GmbH, Otto-Schott-Str. 15, 07745 Jena, Germany
| | - D C Watts
- University of Manchester, School of Medical Sciences,Oxford Road, M13 9PL Manchester, UK
| | - S Kranz
- Department of Conservative Dentistry and Periodontology, University Hospitals Jena, An der alten Post 4, 07743 Jena, Germany.
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4
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Ritzer J, Lühmann T, Rode C, Pein-Hackelbusch M, Immohr I, Schedler U, Thiele T, Stübinger S, Rechenberg BV, Waser-Althaus J, Schlottig F, Merli M, Dawe H, Karpíšek M, Wyrwa R, Schnabelrauch M, Meinel L. Diagnosing peri-implant disease using the tongue as a 24/7 detector. Nat Commun 2017; 8:264. [PMID: 28811549 PMCID: PMC5557808 DOI: 10.1038/s41467-017-00340-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 06/22/2017] [Indexed: 11/09/2022] Open
Abstract
Our ability of screening broad communities for clinically asymptomatic diseases critically drives population health. Sensory chewing gums are presented targeting the tongue as 24/7 detector allowing diagnosis by "anyone, anywhere, anytime". The chewing gum contains peptide sensors consisting of a protease cleavable linker in between a bitter substance and a microparticle. Matrix metalloproteinases in the oral cavity, as upregulated in peri-implant disease, specifically target the protease cleavable linker while chewing the gum, thereby generating bitterness for detection by the tongue. The peptide sensors prove significant success in discriminating saliva collected from patients with peri-implant disease versus clinically asymptomatic volunteers. Superior outcome is demonstrated over commercially available protease-based tests in saliva. "Anyone, anywhere, anytime" diagnostics are within reach for oral inflammation. Expanding this platform technology to other diseases in the future features this diagnostic as a massive screening tool potentially maximizing impact on population health.Early detection of gum inflammation caused by dental implants helps prevent tissue damage. Here, the authors present a peptide sensor that generates a bitter taste when cleaved by proteases present in peri-implant disease, embed it in a chewing gum, and compare the probe to existing sensors using patient saliva.
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Affiliation(s)
- J Ritzer
- Institute for Pharmacy and Food Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - T Lühmann
- Institute for Pharmacy and Food Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - C Rode
- Biomaterials Department, Innovent e.V., Prüssingstraße 27B, 07745, Jena, Germany
| | - M Pein-Hackelbusch
- Institute for Pharmaceutics, Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - I Immohr
- Institute for Pharmaceutics, Universität Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - U Schedler
- PolyAn GmbH, Rudolf-Baschant-Straße 2, 13086, Berlin, Germany
| | - T Thiele
- PolyAn GmbH, Rudolf-Baschant-Straße 2, 13086, Berlin, Germany
| | - S Stübinger
- Musculoskeletal Research Unit, Center for Applied Biotechnology and Molecular Medicine, Universität Zürich, Winterthurerstrasse 270, 8057, Zurich, Switzerland
| | - B V Rechenberg
- Musculoskeletal Research Unit, Center for Applied Biotechnology and Molecular Medicine, Universität Zürich, Winterthurerstrasse 270, 8057, Zurich, Switzerland
| | - J Waser-Althaus
- Thommen Medical AG, Neckarsulmstrasse 28, 2540, Grenchen, Switzerland
| | - F Schlottig
- Thommen Medical AG, Neckarsulmstrasse 28, 2540, Grenchen, Switzerland
| | - M Merli
- Indent-International Dental Research and Education srl, Via Settembrini 17/o, 47923, Rimini, Italy
| | - H Dawe
- Indent-International Dental Research and Education srl, Via Settembrini 17/o, 47923, Rimini, Italy
| | - M Karpíšek
- BioVendor-Laboratorni medicina AS and Department of Human Pharmacology and Toxicology, University of Veterinary and Pharmaceutical Sciences, Palackého 1-3, 61242, Brno, Czech Republic
| | - R Wyrwa
- Biomaterials Department, Innovent e.V., Prüssingstraße 27B, 07745, Jena, Germany
| | - M Schnabelrauch
- Biomaterials Department, Innovent e.V., Prüssingstraße 27B, 07745, Jena, Germany
| | - L Meinel
- Institute for Pharmacy and Food Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
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5
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Lips KS, Kauschke V, Hartmann S, Thormann U, Ray S, Schumacher M, Gelinsky M, Heinemann S, Hanke T, Kautz AR, Schnabelrauch M, Szalay G, Heiss C, Schnettler R, Alt V, Kilian O. Cholinergic nerve fibers in bone defects of a rat osteoporosis model and their regulation by implantation of bone substitution materials. J Musculoskelet Neuronal Interact 2014; 14:173-188. [PMID: 24879021] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVES Bone is innervated by autonomic nervous system that consists of sympathetic and parasympathetic nerves that were recently identified in bone. Thus we asked whether parasympathetic nerves occur in bone defects and at the interface of substitution materials that were implanted for stabilization and improvement of healing in an osteoporosis animal model. METHODS Osteoporosis was induced in rats by ovariectomy and deficiency diet. A wedge-shaped osteotomy was performed in the metaphyseal area of femur. Eight different implants were inserted that were based on calcium phosphate cement, iron, silica-mineralized collagen, and modifications with strontium. Nerves were identified by immunohistochemistry with antibodies against vesicular acetylcholine transporter (VAChT), tyrosine hydroxylase (TH) and protein gene product 9.5 (PGP 9.5) as neuronal marker. RESULTS Cholinergic nerves identified with VAChT immunostaining were detected in defects filled with granulation tissue and in surrounding mast cells. No immunolabeling of cholinergic nerves was found after implantation. The general presence of nerves was reduced after implantation as shown by PGP 9.5. Sympathetic nerves identified by TH immunolabeling were increased in strontium functionalized materials. CONCLUSION Since cholinergic innervation was diminished after implantation a further increase in the compatibility of substitution materials to nerves could improve defect healing especially in osteoporotic bone.
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Affiliation(s)
- K S Lips
- Laboratory for Experimental Trauma Surgery, Justus-Liebig University Giessen, Kerkraderstr. 9, 35394 Giessen, Germany
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Tsourdi E, Rauner M, Rachner TD, Salbach-Hirsch J, Möller S, Schnabelrauch M, Hofbauer LC. Glycosaminoglycans and their sulfate derivatives differentially regulate the vitality and gene expression of osteocyte-like cell lines. Exp Clin Endocrinol Diabetes 2014. [DOI: 10.1055/s-0034-1372015] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Nilebäck E, Enochson L, Altgärde N, Schnabelrauch M, Lindahl A, Svedhem S, Kunze A. Acoustic monitoring of changes in well-defined hyaluronan layers exposed to chondrocytes. Analyst 2014; 139:5350-3. [DOI: 10.1039/c4an01393j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction of human-derived chondrocytes and thin hyaluronan layers was studied using the quartz crystal microbalance with dissipation (QCM-D) technique combined with light microscopy.
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Affiliation(s)
- E. Nilebäck
- Dept. of Appl. Physics
- Chalmers University of Technology
- Göteborg, Sweden
- Biolin Scientific AB
- Västra Frölunda, Sweden
| | - L. Enochson
- Dept. of Clinical Chemistry and Transfusion Medicine
- Sahlgrenska Academy
- University of Gothenburg
- Göteborg, Sweden
| | - N. Altgärde
- Dept. of Appl. Physics
- Chalmers University of Technology
- Göteborg, Sweden
| | | | - A. Lindahl
- Dept. of Clinical Chemistry and Transfusion Medicine
- Sahlgrenska Academy
- University of Gothenburg
- Göteborg, Sweden
| | - S. Svedhem
- Dept. of Appl. Physics
- Chalmers University of Technology
- Göteborg, Sweden
| | - A. Kunze
- Dept. of Appl. Physics
- Chalmers University of Technology
- Göteborg, Sweden
- Inst. of Physical Chemistry
- Univerisity of Götttingen
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8
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Korn P, Schulz MC, Hintze V, Range U, Mai R, Eckelt U, Schnabelrauch M, Möller S, Becher J, Scharnweber D, Stadlinger B. Chondroitin sulfate and sulfated hyaluronan-containing collagen coatings of titanium implants influence peri-implant bone formation in a minipig model. J Biomed Mater Res A 2013; 102:2334-44. [PMID: 23946280 DOI: 10.1002/jbm.a.34913] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 07/10/2013] [Accepted: 08/05/2013] [Indexed: 01/21/2023]
Abstract
An improved osseous integration of dental implants in patients with lower bone quality is of particular interest. The aim of this study was to evaluate the effect of artificial extracellular matrix implant coatings on early bone formation. The coatings contained collagen (coll) in conjunction with either chondroitin sulfate (CS) or sulfated hyaluronan (sHya). Thirty-six screw-type, grit-blasted, and acid-etched titanium implants were inserted in the mandible of 6 minipigs. Three surface states were tested: (1) uncoated control (2) coll/CS (3) coll/sHya. After healing periods of 4 and 8 weeks, bone implant contact (BIC), bone volume density (BVD) as well as osteoid related parameters were measured. After 4 weeks, control implants showed a BIC of 44% which was comparable to coll/CS coated implants (48%) and significantly higher compared to coll/sHya coatings (37%, p = 0.012). This difference leveled out after 8 weeks. No significant differences could be detected for BVD values after 4 weeks and all surfaces showed reduced BVD values after 8 weeks. However, at that time, BVD around both, coll/CS (30%, p = 0.029), and coll/sHya (32%, p = 0.015), coatings was significantly higher compared to controls (22%). The osteoid implant contact (OIC) showed no significant differences after 4 weeks. After 8 weeks OIC for controls was comparable to coll/CS, the latter being significantly higher compared to coll/sHya (0.9% vs. 0.4%, p = 0.012). There were no significant differences in osteoid volume density. In summary, implant surface coatings by the chosen organic components of the extracellular matrix showed a certain potential to influence osseointegration in vivo.
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Affiliation(s)
- P Korn
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine "Carl Gustav Carus, " Technische Universität Dresden, Fetscherstr. 74, D-01307, Dresden, Germany
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9
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Stadlinger B, Korn P, Tödtmann N, Eckelt U, Range U, Bürki A, Ferguson SJ, Kramer I, Kautz A, Schnabelrauch M, Kneissel M, Schlottig F. Osseointegration of biochemically modified implants in an osteoporosis rodent model. Eur Cell Mater 2013; 25:326-40; discussion 339-40. [PMID: 23832686 DOI: 10.22203/ecm.v025a23] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [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 present study examined the impact of implant surface modifications on osseointegration in an osteoporotic rodent model. Sandblasted, acid-etched titanium implants were either used directly (control) or were further modified by surface conditioning with NaOH or by coating with one of the following active agents: collagen/chondroitin sulphate, simvastatin, or zoledronic acid. Control and modified implants were inserted into the proximal tibia of aged ovariectomised (OVX) osteoporotic rats (n = 32/group). In addition, aged oestrogen competent animals received either control or NaOH conditioned implants. Animals were sacrificed 2 and 4 weeks post-implantation. The excised tibiae were utilised for biomechanical and morphometric readouts (n = 8/group/readout). Biomechanical testing revealed at both time points dramatically reduced osseointegration in the tibia of oestrogen deprived osteoporotic animals compared to intact controls irrespective of NaOH exposure. Consistently, histomorphometric and microCT analyses demonstrated diminished bone-implant contact (BIC), peri-implant bone area (BA), bone volume/tissue volume (BV/TV) and bone-mineral density (BMD) in OVX animals. Surface coating with collagen/chondroitin sulphate had no detectable impact on osseointegration. Interestingly, statin coating resulted in a transient increase in BIC 2 weeks post-implantation; which, however, did not correspond to improvement of biomechanical readouts. Local exposure to zoledronic acid increased BIC, BA, BV/TV and BMD at 4 weeks. Yet this translated only into a non-significant improvement of biomechanical properties. In conclusion, this study presents a rodent model mimicking severely osteoporotic bone. Contrary to the other bioactive agents, locally released zoledronic acid had a positive impact on osseointegration albeit to a lesser extent than reported in less challenging models.
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Affiliation(s)
- B Stadlinger
- Clinic of Cranio-Maxillofacial and Oral Surgery, University of Zurich, Plattenstr. 11, CH-8032 Zurich, Switzerland.
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10
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Schnabelrauch M, Scharnweber D, Schiller J. Sulfated Glycosaminoglycans As Promising Artificial Extracellular Matrix Components to Improve the Regeneration of Tissues. Curr Med Chem 2013; 20:2501-23. [DOI: 10.2174/0929867311320200001] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 02/20/2013] [Accepted: 03/13/2013] [Indexed: 11/22/2022]
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Wojak-Cwik IM, Hintze V, Schnabelrauch M, Moeller S, Dobrzynski P, Pamula E, Scharnweber D. Poly(L-lactide-co-glycolide) scaffolds coated with collagen and glycosaminoglycans: impact on proliferation and osteogenic differentiation of human mesenchymal stem cells. J Biomed Mater Res A 2013; 101:3109-22. [PMID: 23526792 DOI: 10.1002/jbm.a.34620] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/21/2013] [Accepted: 01/23/2013] [Indexed: 12/27/2022]
Abstract
In this study, we analyzed poly(L-lactide-co-glycolide) (PLGA) scaffolds modified with artificial extracellular matrices (aECM) consisting of collagen type I, chondroitin sulphate, and sulphated hyaluronan (sHya). We investigated the effect of these aECM coatings on proliferation and osteogenic differentiation of human mesenchymal stem cells (hMSC) in vitro. We found that scaffolds were homogeneously coated, and cross-linking of aECM did not significantly influence the amount of collagen immobilized. Cell proliferation was significantly increased on cross-linked surfaces in expansion medium (EM), but was retarded on cross-linked and non-cross-linked collagen/sHya coatings. The alkaline phosphatase activity was increased on sHya-containing coatings in EM even without the presence of differentiation supplements, but was six to ten times higher in differentiation medium (DM) and comparable for cross-linked and non-cross-linked collagen/sHya. The highest amount of calcium phosphate mineral was deposited on day 28 on cross-linked collagen/sHya. Therefore, coatings of PLGA scaffolds with collagen/sHya promoted the osteogenic differentiation of hMSCs in vitro and might be an interesting candidate for the modification of PLGA for bone reconstruction in vivo.
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Affiliation(s)
- I M Wojak-Cwik
- Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. A. Mickiewicza 30, Krakow, Poland; Institute of Material Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Straße 27, Dresden, Germany
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12
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Hempel U, Möller S, Noack C, Hintze V, Scharnweber D, Schnabelrauch M, Dieter P. Sulfated hyaluronan/collagen I matrices enhance the osteogenic differentiation of human mesenchymal stromal cells in vitro even in the absence of dexamethasone. Acta Biomater 2012; 8:4064-72. [PMID: 22771456 DOI: 10.1016/j.actbio.2012.06.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 06/23/2012] [Accepted: 06/29/2012] [Indexed: 02/04/2023]
Abstract
Glycosaminoglycans (GAG) are multifunctional components of the extracellular matrix (ECM) involved in different steps of the regulation of cellular differentiation. In this study artificial extracellular matrices (aECM) consisting of collagen (Col) I and different GAG derivatives were used as a substrate for human mesenchymal stromal cells (hMSC) to study osteogenic differentiation in vitro. hMSC were cultured on aECM containing col and hyaluronan sulfates (HyaS) with increasing degrees of sulfation (DS(S)) and were compared with aECM containing col and the natural GAG hyaluronan or chondroitin 4-sulfate. hMSC were analyzed for osteogenic differentiation markers such as calcium phosphate deposition, tissue non-specific alkaline phosphatase (TNAP) and expression of runt-related transcription factor 2 (runx2), osteocalcin (ocn) and bone sialoprotein II (bspII). Compared with aECM containing Col and natural GAG all Col/HyaS-containing aECM induced an increase in calcium phosphate deposition, TNAP activity and tnap expression. These effects were also seen in the absence of dexamethasone (an established osteogenic supplement). The expression of runx2 and ocn was not altered and the expression of bspII was diminished on the col/HyaS-containing aECM. The impact of the Col/HyaS-containing aECM on hMSC differentiation was independent of the DS(S) of the HyaS derivatives, indicating the importance of the primary (C-6) hydroxyl group of N-acetylglucosamine. These results suggest that Col/HyaS-containing aECM are able to stimulate hMSC to undergo osteogenic differentiation even in the absence of dexamethasone, which makes these matrices an interesting tool for hMSC-based tissue engineering applications and biomaterial functionalizations to enhance bone formation.
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Hintze V, Miron A, Möller S, Schnabelrauch M, Heinemann S, Worch H, Scharnweber D. Artificial extracellular matrices of collagen and sulphated hyaluronan enhance the differentiation of human mesenchymal stem cells in the presence of dexamethasone. J Tissue Eng Regen Med 2012; 8:314-24. [PMID: 22718572 DOI: 10.1002/term.1528] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 02/09/2012] [Accepted: 04/03/2012] [Indexed: 12/19/2022]
Abstract
In this study we investigated the potential of artificial extracellular matrix (aECM) coatings containing collagen II and two types of glycosaminoglycan (GAGs) with different degrees of sulphation to promote human bone formation in biomedical applications. To this end their impact on growth and osteogenic differentiation of human mesenchymal stem cells (hMSCs) was assessed. The cell proliferation was found to be significantly retarded in the first 14 days of culture on surfaces coated with collagen II and GAGs (coll-II/GAG) as compared to tissue culture polystyrol (TCPS) and those coated with collagen II. At later time points it only tended to be retarded on coll-II/sHya3.1. Heat-inactivation of the serum significantly reduced cell numbers on collagen II and coll-II/sHya3.1. Alkaline phosphatase (ALP) activity and calcium deposition, on the other hand, were higher for coatings containing sHya3.1 and were not significantly changed by heat-inactivation of the serum. Expression levels of the bone matrix proteins bone sialoprotein (BSP-II) and osteopontin (OP) were also increased on aECM coatings as compared to TCPS, which further validated the differentiation of hMSCs towards the osteogenic lineage. These observations reveal that aECM coatings, in particular those containing sHya3.1, are suitable to promote the osteogenic differentiation of hMSCs.
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Affiliation(s)
- V Hintze
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Germany
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Otto K, Berg A, Schnabelrauch M, Schneider G. Animal study for the development and validation of new tissue adhesives for the use in otorhinolaryngology. BIOMED ENG-BIOMED TE 2012. [DOI: 10.1515/bmt-2012-4301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kraus R, Peters F, Geck A, Lips KS, Obert M, Röder C, Schnabelrauch M, Schnettler R, Heiss C. [Adhesive strength of a β-tricalcium phosphate-enriched bone adhesive]. Z Orthop Unfall 2011; 149:271-8. [PMID: 21567362 DOI: 10.1055/s-0030-1270709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND This investigation describes experimental tests of the biomechanical features of a new resorbable bone adhesive based on methacrylate-terminated oligolactides enhanced with osteoconductive β-tricalcium phosphate. MATERIAL AND METHODS 51 New Zealand white rabbits were randomised to an adhesive group (n = 29) and a control group (n = 22). An extra-articular bone cylinder was taken from the proximal tibia, two stripes of adhesive were applied and the cylinders were replanted. After 10 and 21 days, 3 and 12 months tibial specimens were harvested and the cylinder pull-out test was performed with a servo-hydraulic machine. Additionally the pull-out force was evaluated with the bone-equivalent Ebazell® after 5, 10 and 360 minutes in 14 specimens each. RESULTS Average pull-out forces in the adhesive group were 28 N after 10 days (control: 57 N), 155 N after 21 days (216 N), 184 N after 3 months (197 N) and 205 N after 12 months (185 N). Investigations with Ebazell® showed almost identical pull-out forces after 5 min, 15 min and 360 min. Adhesive forces were as high as 125 N/cm (2) of adhesive surface and more than 1200 N/g of adhesive mass. CONCLUSIONS The adhesive investigated here has a very good primary adhesive power, compared to the literature data, achieved after only 5 minutes. Even in moist surroundings the adhesive capacity remains sufficient. The adhesive has to prove its resorptive properties in further investigations and in first line its medium-term and long-lasting biocompatibility. Furthermore, biomechanical features will have to be compared to those of conventional fixation techniques.
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Affiliation(s)
- R Kraus
- Die Institutsangaben sind am Ende des Beitrags gelistet.
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Nimptsch K, Süß R, Riemer T, Nimptsch A, Schnabelrauch M, Schiller J. Differently complex oligosaccharides can be easily identified by matrix-assisted laser desorption and ionization time-of-flight mass spectrometry directly from a standard thin-layer chromatography plate. J Chromatogr A 2010; 1217:3711-5. [DOI: 10.1016/j.chroma.2010.04.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 03/29/2010] [Accepted: 04/06/2010] [Indexed: 10/19/2022]
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Heiss C, Kraus R, Peters F, Henn W, Schnabelrauch M, Berg A, Pautzsch T, Weisser J, Schnettler R. Development of a bioresorbable self-hardening bone adhesive based on a composite consisting of polylactide methacrylates and β-tricalcium phosphate. J Biomed Mater Res B Appl Biomater 2008; 90:55-66. [DOI: 10.1002/jbm.b.31252] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Clement JH, Schwalbe M, Buske N, Wagner K, Schnabelrauch M, Görnert P, Kliche KO, Pachmann K, Weitschies W, Höffken K. Differential interaction of magnetic nanoparticles with tumor cells and peripheral blood cells. J Cancer Res Clin Oncol 2006; 132:287-92. [PMID: 16432758 DOI: 10.1007/s00432-006-0076-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [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: 11/02/2005] [Accepted: 01/02/2006] [Indexed: 10/25/2022]
Abstract
PURPOSE The separation of tumor cells from healthy cells is a vital problem in oncology and hematology, especially from peripheral blood. Magnetic assisted cell sorting (MACS) is a possibility to fulfill these needs. METHODS Tumor cell lines and leukocytes from peripheral blood were incubated with carboxymethyl dextran-coated magnetic nanoparticles under various conditions and separated by MACS. RESULTS We studied the interaction of magnetic nanoparticles devoid of antibodies with healthy and tumor cells. The magnetic nanoparticles interact with tumor cells and leukocytes and are located predominantly within the cell cytoplasm. Incubation of cell culture cells with magnetic nanoparticles led to a labeling of these cells without reduced biological properties for at least 14 days. The interaction of the magnetic nanoparticles with cells depends on several factors. The ionic strength (osmolality) of the solvent plays an important role. We could show that an increase in osmolality led to a dramatic reduction of labeled leukocytes. Tumor cells, however, are mildly affected. This could be detected not only in pure cultures of tumor cells or leukocytes but also in mixed cell populations. CONCLUSION This observation gives us the opportunity to selectively label and separate tumor cells but not leukocytes from the peripheral blood.
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Affiliation(s)
- J H Clement
- Department of Internal Medicine II, Friedrich Schiller University Jena, Erlanger Allee 101, 07740, Jena, Germany.
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Vogt S, Berger S, Wilke I, Larcher Y, Weisser J, Schnabelrauch M. Design of oligolactone-based scaffolds for bone tissue engineering. Biomed Mater Eng 2005; 15:73-85. [PMID: 15623932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Novel difunctional oligolactone macromers have been synthesized by ring-opening oligomerization of various lactones (L-lactide, glycolide, p-dioxanone) in the presence of suitable diols (propane-1,2-diol, dianhydro-D-glucitol) and subsequent endcapping of the formed oligolactones with methacrylate moieties. Based on these macromers, two fabrication procedures were developed to fabricate highly porous scaffolds and the material properties including in vitro biodegradation behaviour of the resulting polymeric scaffolds were investigated. Preliminary in vitro studies on the cytocompatibility of the fabricated scaffolds and on osteoblast cultivation on the optimized polymeric materials demonstrated that the oligolactide based polymer networks possess an excellent biocompatibility and that they are promising candidates as scaffolds in bone tissue engineering.
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Affiliation(s)
- S Vogt
- INNOVENT Technologieentwicklung e.V., Pruessingstrasse 27B, D-07745 Jena, Germany
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Vogt S, Larcher Y, Beer B, Wilke I, Schnabelrauch M. Fabrication of highly porous scaffold materials based on functionalized oligolactides and preliminary results on their use in bone tissue engineering. Eur Cell Mater 2002; 4:30-8. [PMID: 14562248 DOI: 10.22203/ecm.v004a03] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [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
Tissue engineering offers a promising new approach to repair bone defects. Its practical realisation is connected with the development of suitable scaffold materials. In the present work, functionalized oligolactides have been prepared and used as macromers for the scaffold fabrication The developed fabrication process leads to highly porous scaffolds, available in various shapes and sizes, with an open inter-connective pore structure and porosities up to 90%. Degradable or even osteoconductive components as well as biocompatible co-monomers can be used as additives to modulate the scaffold properties. Under in vitro conditions, the scaffolds exhibit a continuous degradation with varying degradation rates depending on their material composition. In vitro studies on the cultivation of osteoblasts on the scaffolds were performed and revealed their excellent biocompatibility. Cell growth on the scaffold surfaces and inside the scaffolds, formation of extracellular matrix and starting mineralization were detected by microscopical and histological analyses. Based on these results the developed materials are well-suited candidates for the design of tailor-made matrices in bone tissue engineering
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Affiliation(s)
- S Vogt
- INNOVENT Technologieentwicklung e. V., Pruessingstr. 27B, D-07745 Jena, Germany
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Wittmann S, Schnabelrauch M, Scherlitz-Hofmann I, Möllmann U, Ankel-Fuchs D, Heinisch L. New synthetic siderophores and their beta-lactam conjugates based on diamino acids and dipeptides. Bioorg Med Chem 2002; 10:1659-70. [PMID: 11937324 DOI: 10.1016/s0968-0896(02)00044-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Linking of siderophores to antibiotics improves the penetration and therefore increases the antibacterial activity of the antibiotics. We synthesized the acylated catecholates and hydroxamates as siderophore components for antibiotic conjugates to reduce side effects of unprotected catecholate and hydroxamate moieties. In this paper, we report on bis- and tris-catecholates and mixed catecholate hydroxamates based on diamino acids or dipeptides. These compounds were active as siderophores in a growth promotion assay under iron limitation. Most of the conjugates with beta-lactams showed high in vitro activity against Gram-negative bacteria especially Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Serratia marcescens and Stenotrophomonas maltophilia. The compounds with enhanced antibacterial activity use active iron uptake routes to penetrate the bacterial outer membrane barrier, demonstrated by assays with mutants deficient in components of the iron transport system. Correlation between chemical structure and biological activity was studied.
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Affiliation(s)
- S Wittmann
- Hans Knöll Institute for Natural Product Research, Jena, Beutenbergstrasse 11, D-07745, Jena, Germany
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Abstract
New artificial catecholate siderophores with methyl alpha-D-glucopyranoside as scaffold were synthesized. The dihydroxy- or di(acetoxy)benzoyl moieties were attached either directly or via aminopropyl spacer groups, to the carbohydrate scaffold. The siderophore activity of the prepared siderophore analogs was examined by a growth promotion assay using various Gram-negative bacteria and mycobacteria and by the CAS-assay.
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Affiliation(s)
- S Heggemann
- Hans Knöll-Institut für Naturstoff-Forschung, Jena, Germany
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Schnabelrauch M, Wittmann S, Rahn K, Möllmann U, Reissbrodt R, Heinisch L. New synthetic catecholate-type siderophores based on amino acids and dipeptides. Biometals 2000; 13:333-48. [PMID: 11247040 DOI: 10.1023/a:1009297610755] [Citation(s) in RCA: 11] [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: 11/12/2022]
Abstract
New analogs of bacterial siderophores with one, two or three catecholate moieties were synthesized using various mono- and diamino acid and dipetide scaffolds, respectively. In addition to 2,3-dihydroxybenzoyl siderophore analogs and their acylated derivatives, 3,4-dihydroxybenzoyl derivatives were prepared. Furthermore, the synthesis of a new triscatecholate serving as an intimate model for enterobactin is reported. Most of the new compounds gave a positive CAS-test and were active as siderophores tested by growth promotion assays with a set of siderophore indicator mutants under iron limitation. Structure-activity-correlations have also been studied.
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Affiliation(s)
- M Schnabelrauch
- Hans Knöll-Institut for Natural Product Research, Jena, Germany
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Abstract
A novel 1,3,5-triamino-myo-inositol derivative is presented as a readily available scaffold for the design of tripodal siderophore mimetics. Based on this scaffold, various hexadentate catecholate-type siderophore analogs were synthesized by attaching the catechols to the inositol scaffold via spacer units of different structure and length. The potential to tune the polarity of the inositol containing siderophore analogs has also been demonstrated by varying the protection group strategy. The siderophore activity of the prepared siderophore analogs was examined by cross-feeding tests with various Gram-negative bacteria and mycobacteria.
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Wagenknecht W, Nehls I, Philipp B, Schnabelrauch M, Klemm D, Hartmann M. Untersuchungen zur Bildung wasserlöslicher Cellulosephosphate durch homogene Acylierung im System Cellulose/N2O4/DMF. 2. Mitt.: Ergebnisse zur Acylierung mit Derivaten des POCl3 und zusamenfassende Diskussion zum Ablauf der Phosphorylierung im System N2O4/DMF/Cellulose. ACTA ACUST UNITED AC 1991. [DOI: 10.1002/actp.1991.010421105] [Citation(s) in RCA: 5] [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: 11/11/2022]
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Schnabelrauch M, Heinze T, Klemm D, Nehis I, K�tz J. Investigations on synthesis and characterization of carboxy-groups containing cellulose sulfates. Polym Bull (Berl) 1991. [DOI: 10.1007/bf00296024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wagenknecht W, Philipp B, Nehls I, Schnabelrauch M, Klemm D, Hartmann M. Untersuchungen zur Bildung wasserlöslicher Cellulosephosphate durch homogene Acylierung im System Cellulose N2O4/DMF. 1. Mitt.: Problemstellung und Ergebnisse zur Acylierung mit POCl3. ACTA ACUST UNITED AC 1991. [DOI: 10.1002/actp.1991.010420506] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schnabelrauch M, Heinze T, Klemm D. Synthesechemische Modifizierung von Cellulose zur Einführung aktiver funktioneller Gruppen unter heterogenen Reaktionsbedingungen. Fortschrittsbericht. ACTA ACUST UNITED AC 1990. [DOI: 10.1002/actp.1990.010410210] [Citation(s) in RCA: 6] [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: 11/10/2022]
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29
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Klemm D, Hartmann M, Stein A, Schnabelrauch M, Spangenberg S, Gross M, Klepel M, Jumar A. Dünnschichtchromatographische untersuchungen biocider 2-brom-2-nitro-propan-derivate. J Chromatogr A 1988. [DOI: 10.1016/s0021-9673(00)90242-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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