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Siverino C, Tirkkonen-Rajasalo L, Freitag L, Günther C, Thompson K, Styger U, Zeiter S, Eglin D, Stadelmann VA. Restoring implant fixation strength in osteoporotic bone with a hydrogel locally delivering zoledronic acid and bone morphogenetic protein 2. A longitudinal in vivo microCT study in rats. Bone 2024; 180:117011. [PMID: 38176642 DOI: 10.1016/j.bone.2023.117011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/27/2023] [Accepted: 12/28/2023] [Indexed: 01/06/2024]
Abstract
Osteoporosis poses a major public health challenge, and it is characterized by low bone mass, deterioration of the microarchitecture of bone tissue, causing a consequent increase in bone fragility and susceptibility to fractures and complicating bone fixation, particularly screw implantation. In the present study, our aim was to improve implant stability in osteoporotic bone using a thermoresponsive hyaluronan hydrogel (HA-pNIPAM) to locally deliver the bisphosphonate zoledronic acid (ZOL) to prevent bone resorption and bone morphogenetic protein 2 (BMP2) to induce bone formation. Adult female Wistar rats (n = 36) were divided into 2 treatment groups: one group of SHAM-operated animals and another group that received an ovariectomy (OVX) to induce an osteoporotic state. All animals received a polyetheretherketone (PEEK) screw in the proximal tibia. In addition, subgroups of SHAM or OVX animals received either the HA-pNIPAM hydrogel without or with ZOL/BMP2, placed into the defect site prior to screw implantation. Periprosthetic bone and implant fixation were monitored using longitudinal in vivo microCT scanning post-operatively and at 3, 6, 9, 14, 20 and 28 days. Histological assessment was performed post-mortem. Our data showed that pure hydrogel has no impact of implant fixation The ZOL/BMP2-hydrogel significantly increased bone-implant contact and peri-implant bone fraction, primarily through reduced resorption. STATEMENT OF CLINICAL SIGNIFICANCE: Local delivery of ZOL and BMP2 using a biocompatible hydrogel improved implant stability in osteoporotic bone. This approach could constitute a potent alternative to systemic drug administration and may be useful in avoiding implant loosening in clinical settings.
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Affiliation(s)
| | | | | | | | | | | | | | - David Eglin
- AO Research Institute Davos, Davos, Switzerland; Mines Saint-Étienne, Univ Jean Monnet, INSERM, U1059 Sainbiose, Saint-Étienne, France.
| | - Vincent A Stadelmann
- AO Research Institute Davos, Davos, Switzerland; Schulthess Klinik, Department of Research and Development, Zürich, Switzerland.
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2
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Bagnol R, Siverino C, Barnier V, O'Mahony L, Grijpma DW, Eglin D, Moriarty TF. Physicochemical Characterization and Immunomodulatory Activity of Polyelectrolyte Multilayer Coatings Incorporating an Exopolysaccharide from Bifidobacterium longum. Biomacromolecules 2023; 24:5589-5604. [PMID: 37983925 DOI: 10.1021/acs.biomac.3c00516] [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] [Indexed: 11/22/2023]
Abstract
Immunoregulatory polysaccharides from probiotic bacteria have potential in biomedical engineering. Here, a negatively charged exopolysaccharide from Bifidobacterium longum with confirmed immunoregulatory activity (EPS624) was applied in multilayered polyelectrolyte coatings with positively charged chitosan. EPS624 and coatings (1, 5, and 10 layers and alginate-substituted) were characterized by the zeta potential, dynamic light scattering, size exclusion chromatography, scanning electron microscopy, and atomic force microscopy. Peripheral blood mononuclear cells (hPBMCs) and fibroblasts were exposed for 1, 3, 7, and 10 days with cytokine secretion, viability, and morphology as observations. The coatings showed an increased rugosity and exponential growth mode with an increasing number of layers. A dose/layer-dependent IL-10 response was observed in hPBMCs, which was greater than EPS624 in solution and was stable over 7 days. Fibroblast culture revealed no toxicity or metabolic change after exposure to EPS624. The EPS624 polyelectrolyte coatings are cytocompatible, have immunoregulatory properties, and may be suitable for applications in biomedical engineering.
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Affiliation(s)
- Romain Bagnol
- AO Research Institute Davos, Davos Platz 7270, Switzerland
- Technical Medical Centre, Department of Advanced Organ Engineering and Therapeutics, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede 7522 NB, The Netherlands
| | | | - Vincent Barnier
- UMR 5307 LGF, CNRS, Mines Saint-Etienne, Centre SMS, Saint-Etienne F-42023, France
| | - Liam O'Mahony
- Departments of Medicine and Microbiology, APC Microbiome Ireland, University College Cork, Cork TH12 HW58, Ireland
| | - Dirk W Grijpma
- Technical Medical Centre, Department of Advanced Organ Engineering and Therapeutics, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede 7522 NB, The Netherlands
| | - David Eglin
- Technical Medical Centre, Department of Advanced Organ Engineering and Therapeutics, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede 7522 NB, The Netherlands
- Univ Jean Monnet, INSERM, Mines Saint-Étienne, U1059 Sainbiose, Saint-Étienne F-42023, France
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Hatt LP, Wirth S, Ristaniemi A, Ciric DJ, Thompson K, Eglin D, Stoddart MJ, Armiento AR. Micro-porous PLGA/ β-TCP/TPU scaffolds prepared by solvent-based 3D printing for bone tissue engineering purposes. Regen Biomater 2023; 10:rbad084. [PMID: 37936893 PMCID: PMC10627288 DOI: 10.1093/rb/rbad084] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/14/2023] [Accepted: 08/31/2023] [Indexed: 11/09/2023] Open
Abstract
The 3D printing process of fused deposition modelling is an attractive fabrication approach to create tissue-engineered bone substitutes to regenerate large mandibular bone defects, but often lacks desired surface porosity for enhanced protein adsorption and cell adhesion. Solvent-based printing leads to the spontaneous formation of micropores on the scaffold's surface upon solvent removal, without the need for further post processing. Our aim is to create and characterize porous scaffolds using a new formulation composed of mechanically stable poly(lactic-co-glycol acid) and osteoconductive β-tricalcium phosphate with and without the addition of elastic thermoplastic polyurethane prepared by solvent-based 3D-printing technique. Large-scale regenerative scaffolds can be 3D-printed with adequate fidelity and show porosity at multiple levels analysed via micro-computer tomography, scanning electron microscopy and N2 sorption. Superior mechanical properties compared to a commercially available calcium phosphate ink are demonstrated in compression and screw pull out tests. Biological assessments including cell activity assay and live-dead staining prove the scaffold's cytocompatibility. Osteoconductive properties are demonstrated by performing an osteogenic differentiation assay with primary human bone marrow mesenchymal stromal cells. We propose a versatile fabrication process to create porous 3D-printed scaffolds with adequate mechanical stability and osteoconductivity, both important characteristics for segmental mandibular bone reconstruction.
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Affiliation(s)
- Luan P Hatt
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
- Institute for Biomechanics, ETH Zürich, 8093 Zürich, Switzerland
| | - Sylvie Wirth
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
- Institute for Biomechanics, ETH Zürich, 8093 Zürich, Switzerland
| | | | - Daniel J Ciric
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
| | - Keith Thompson
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
- UCB Pharma, SL1 3WE Slough, UK
| | - David Eglin
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
- Mines Saint-Étienne, Université de Lyon, Université Jean Monnet, INSERM, U1059, 42023 Sainbiose, Saint-Étienne, France
| | - Martin J Stoddart
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
- Medical Center, Faculty of Medicine, Albert-Ludwigs-University of Freiburg, 79106 Freiburg, Germany
| | - Angela R Armiento
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
- UCB Pharma, SL1 3WE Slough, UK
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Schwab A, Wesdorp MA, Xu J, Abinzano F, Loebel C, Falandt M, Levato R, Eglin D, Narcisi R, Stoddart MJ, Malda J, Burdick JA, D'Este M, van Osch GJ. Modulating design parameters to drive cell invasion into hydrogels for osteochondral tissue formation. J Orthop Translat 2023; 41:42-53. [PMID: 37691639 PMCID: PMC10485598 DOI: 10.1016/j.jot.2023.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/08/2023] [Accepted: 07/03/2023] [Indexed: 09/12/2023] Open
Abstract
Background The use of acellular hydrogels to repair osteochondral defects requires cells to first invade the biomaterial and then to deposit extracellular matrix for tissue regeneration. Due to the diverse physicochemical properties of engineered hydrogels, the specific properties that allow or even improve the behaviour of cells are not yet clear. The aim of this study was to investigate the influence of various physicochemical properties of hydrogels on cell migration and related tissue formation using in vitro, ex vivo and in vivo models. Methods Three hydrogel platforms were used in the study: Gelatine methacryloyl (GelMA) (5% wt), norbornene hyaluronic acid (norHA) (2% wt) and tyramine functionalised hyaluronic acid (THA) (2.5% wt). GelMA was modified to vary the degree of functionalisation (DoF 50% and 80%), norHA was used with varied degradability via a matrix metalloproteinase (MMP) degradable crosslinker and THA was used with the addition of collagen fibrils. The migration of human mesenchymal stromal cells (hMSC) in hydrogels was studied in vitro using a 3D spheroid migration assay over 48h. In addition, chondrocyte migration within and around hydrogels was investigated in an ex vivo bovine cartilage ring model (three weeks). Finally, tissue repair within osteochondral defects was studied in a semi-orthotopic in vivo mouse model (six weeks). Results A lower DoF of GelMA did not affect cell migration in vitro (p = 0.390) and led to a higher migration score ex vivo (p < 0.001). The introduction of a MMP degradable crosslinker in norHA hydrogels did not improve cell infiltration in vitro or in vivo. The addition of collagen to THA resulted in greater hMSC migration in vitro (p = 0.031) and ex vivo (p < 0.001). Hydrogels that exhibited more cell migration in vitro or ex vivo also showed more tissue formation in the osteochondral defects in vivo, except for the norHA group. Whereas norHA with a degradable crosslinker did not improve cell migration in vitro or ex vivo, it did significantly increase tissue formation in vivo compared to the non-degradable crosslinker (p < 0.001). Conclusion The modification of hydrogels by adapting DoF, use of a degradable crosslinker or including fibrillar collagen can control and improve cell migration and tissue formation for osteochondral defect repair. This study also emphasizes the importance of performing both in vitro and in vivo testing of biomaterials, as, depending on the material, the results might be affected by the model used.The translational potential of this article: This article highlights the potential of using acellular hydrogels to repair osteochondral defects, which are common injuries in orthopaedics. The study provides a deeper understanding of how to modify the properties of hydrogels to control cell migration and tissue formation for osteochondral defect repair. The results of this article also highlight that the choice of the used laboratory model can affect the outcome. Testing hydrogels in different models is thus advised for successful translation of laboratory results to the clinical application.
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Affiliation(s)
- Andrea Schwab
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
| | - Marinus A. Wesdorp
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Jietao Xu
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Florencia Abinzano
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Claudia Loebel
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Marc Falandt
- Department of Clinical Sciences, Faculty of Veterinary Sciences, Utrecht University, Utrecht, the Netherlands
| | - Riccardo Levato
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, the Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Sciences, Utrecht University, Utrecht, the Netherlands
| | - David Eglin
- Mines Saint-Etienne, University Jean Monnet, INSERM, UMR 1059, Saint-Etienne, France
- Advanced Organ Bioengineering and Therapeutics, Faculty of Science and Technology, TechMed Center, University of Twente, Enschede, the Netherlands
| | - Roberto Narcisi
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | | | - Jos Malda
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, the Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Sciences, Utrecht University, Utrecht, the Netherlands
| | - Jason A. Burdick
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Matteo D'Este
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
| | - Gerjo J.V.M. van Osch
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Otorhinolaryngology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology, Delft, the Netherlands
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5
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Wesdorp MA, Schwab A, Bektas EI, Narcisi R, Eglin D, Stoddart MJ, Van Osch GJ, D'Este M. A culture model to analyze the acute biomaterial-dependent reaction of human primary neutrophils in vitro. Bioact Mater 2023; 20:627-637. [PMID: 35846845 PMCID: PMC9256821 DOI: 10.1016/j.bioactmat.2022.05.036] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/08/2022] [Accepted: 05/28/2022] [Indexed: 11/16/2022] Open
Affiliation(s)
- Marinus A. Wesdorp
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Andrea Schwab
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Oral and Maxillofacial Surgery, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - Ezgi Irem Bektas
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
| | - Roberto Narcisi
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - David Eglin
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Mines Saint-Étienne, Univ Lyon, Univ Jean Monnet, INSERM, U1059 Sainbiose, Saint-Étienne, France
- Department of Biomaterials Science and Technology, University of Twente, Enschede, the Netherlands
| | | | - Gerjo J.V.M. Van Osch
- Department of Orthopaedics and Sports Medicine, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Otorhinolaryngology, Erasmus MC, University Medical Center Rotterdam, the Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology, the Netherlands
| | - Matteo D'Este
- AO Research Institute Davos, AO Foundation, Davos Platz, Switzerland
- Corresponding author. AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland.
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Hatt LP, Armiento AR, Mys K, Thompson K, Hildebrand M, Nehrbass D, Müller WEG, Zeiter S, Eglin D, Stoddart MJ. Standard in vitro evaluations of engineered bone substitutes are not sufficient to predict in vivo preclinical model outcomes. Acta Biomater 2023; 156:177-189. [PMID: 35988660 DOI: 10.1016/j.actbio.2022.08.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/10/2022] [Accepted: 08/11/2022] [Indexed: 01/18/2023]
Abstract
Understanding the optimal conditions required for bone healing can have a substantial impact to target the problem of non-unions and large bone defects. The combination of bioactive factors, regenerative progenitor cells and biomaterials to form a tissue engineered (TE) complex is a promising solution but translation to the clinic has been slow. We hypothesized the typical material testing algorithm used is insufficient and leads to materials being mischaracterized as promising. In the first part of this study, human bone marrow - derived mesenchymal stromal cells (hBM-MSCs) were embedded in three commonly used biomaterials (hyaluronic acid methacrylate, gelatin methacrylate and fibrin) and combined with relevant bioactive osteogenesis factors (dexamethasone microparticles and polyphosphate nanoparticles) to form a TE construct that underwent in vitro osteogenic differentiation for 28 days. Gene expression of relevant transcription factors and osteogenic markers, and von Kossa staining were performed. In the second and third part of this study, the same combination of TE constructs were implanted subcutaneously (cell containing) in T cell-deficient athymic Crl:NIH-Foxn1rnu rats for 8 weeks or cell free in an immunocompetent New Zealand white rabbit calvarial model for 6 weeks, respectively. Osteogenic performance was investigated via MicroCT imaging and histology staining. The in vitro study showed enhanced upregulation of relevant genes and significant mineral deposition within the three biomaterials, generally considered as a positive result. Subcutaneous implantation indicates none to minor ectopic bone formation. No enhanced calvarial bone healing was detected in implanted biomaterials compared to the empty defect. The reasons for the poor correlation of in vitro and in vivo outcomes are unclear and needs further investigation. This study highlights the discrepancy between in vitro and in vivo outcomes, demonstrating that in vitro data should be interpreted with extreme caution. In vitro models with higher complexity are necessary to increase value for translational studies. STATEMENT OF SIGNIFICANCE: Preclinical testing of newly developed biomaterials is a crucial element of the development cycle. Despite this, there is still significant discrepancy between in vitro and in vivo test results. Within this study we investigate multiple combinations of materials and osteogenic stimulants and demonstrate a poor correlation between the in vitro and in vivo data. We propose rationale for why this may be the case and suggest a modified testing algorithm.
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Affiliation(s)
- Luan P Hatt
- AO Research Institute Davos, 7270 Davos Platz, Switzerland; Institute for Biomechanics, ETH Zürich; 8093 Zürich, Switzerland
| | | | - Karen Mys
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
| | - Keith Thompson
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
| | | | - Dirk Nehrbass
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
| | - Werner E G Müller
- Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Stephan Zeiter
- AO Research Institute Davos, 7270 Davos Platz, Switzerland
| | - David Eglin
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059 Sainbiose, Centre CIS, F-42023 Saint-Etienne, France
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7
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Galliani M, Ferrari LM, Bouet G, Eglin D, Ismailova E. Tailoring inkjet-printed PEDOT:PSS composition toward green, wearable device fabrication. APL Bioeng 2023; 7:016101. [PMID: 36619686 PMCID: PMC9812513 DOI: 10.1063/5.0117278] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 12/12/2022] [Indexed: 01/10/2023] Open
Abstract
Inkjet printing remains one of the most cost-efficient techniques for device prototyping and manufacturing, offering considerable freedom of digital design, non-contact, and additive fabrication. When developing novel wearable devices, a balanced approach is required between functional, user-safe materials and scalable manufacturing processes. Here, we propose a tailor-made ink formulation, based on non-hazardous materials, to develop green electronic devices aimed at interfacing with humans. We demonstrate that developed ink exhibits high-resolution inkjet printability, in line with theoretical prediction, on multiple wearable substrates. The ink's chemical composition ensures the pattern's enhanced electrical properties, mechanical flexibility, and stability in water. The cytocompatibility evaluations show no noxious effects from printed films in contact with human mesenchymal stem cells. Finally, we fabricated a printed wearable touch sensor on a non-woven fabric substrate, capable of tracking human steps. This is a step toward the development of green wearable electronics manufacturing, demonstrating a viable combination of materials and processes for biocompatible devices.
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Affiliation(s)
- Marina Galliani
- Mines Saint-Etienne, Centre CMP, Département BEL, F-13541 Gardanne, France
| | | | - Guenaelle Bouet
- Mines Saint-Étienne, Université Jean Monnet, INSERM, U1059 Sainbiose, Saint-Étienne F-42023, France
| | - David Eglin
- Mines Saint-Étienne, Université Jean Monnet, INSERM, U1059 Sainbiose, Saint-Étienne F-42023, France
| | - Esma Ismailova
- Mines Saint-Etienne, Centre CMP, Département BEL, F-13541 Gardanne, France,Author to whom correspondence should be addressed:
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8
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Rotman S, Post V, Foster A, Lavigne R, Wagemans J, Trampuz A, Moreno MG, Metsemakers WJ, Grijpma D, Richards R, Eglin D, Moriarty T. Alginate chitosan microbeads and thermos-responsive hyaluronic acid hydrogel for phage delivery. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Hasan A, Bagnol R, Owen R, Latif A, Rostam HM, Elsharkawy S, Rose FRAJ, Rodríguez-Cabello JC, Ghaemmaghami AM, Eglin D, Mata A. Mineralizing Coating on 3D Printed Scaffolds for the Promotion of Osseointegration. Front Bioeng Biotechnol 2022; 10:836386. [PMID: 35832405 PMCID: PMC9271852 DOI: 10.3389/fbioe.2022.836386] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
Design and fabrication of implants that can perform better than autologous bone grafts remain an unmet challenge for the hard tissue regeneration in craniomaxillofacial applications. Here, we report an integrated approach combining additive manufacturing with supramolecular chemistry to develop acellular mineralizing 3D printed scaffolds for hard tissue regeneration. Our approach relies on an elastin-like recombinamer (ELR) coating designed to trigger and guide the growth of ordered apatite on the surface of 3D printed nylon scaffolds. Three test samples including a) uncoated nylon scaffolds (referred to as "Uncoated"), b) ELR coated scaffolds (referred to as "ELR only"), and c) ELR coated and in vitro mineralized scaffolds (referred to as "Pre-mineralized") were prepared and tested for in vitro and in vivo performance. All test samples supported normal human immortalized mesenchymal stem cell adhesion, growth, and differentiation with enhanced cell proliferation observed in the "Pre-mineralized" samples. Using a rabbit calvarial in vivo model, 'Pre-mineralized' scaffolds also exhibited higher bone ingrowth into scaffold pores and cavities with higher tissue-implant integration. However, the coated scaffolds ("ELR only" and "Pre-mineralized") did not exhibit significantly more new bone formation compared to "Uncoated" scaffolds. Overall, the mineralizing coating offers an opportunity to enhance integration of 3D printed bone implants. However, there is a need to further decipher and tune their immunologic response to develop truly osteoinductive/conductive surfaces.
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Affiliation(s)
- Abshar Hasan
- School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
- Biodiscovery Institute, University of Nottingham, Nottingham, United Kingdom
- Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham, United Kingdom
| | - Romain Bagnol
- Regenerative Orthopaedics, AO Research Institute, Davos, Switzerland
| | - Robert Owen
- School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
- Biodiscovery Institute, University of Nottingham, Nottingham, United Kingdom
| | - Arsalan Latif
- Immunology and Immuno-Bioengineering Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Hassan M. Rostam
- Immunology and Immuno-Bioengineering Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Sherif Elsharkawy
- Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London, United Kingdom
| | - Felicity R. A. J. Rose
- School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
- Biodiscovery Institute, University of Nottingham, Nottingham, United Kingdom
| | | | - Amir M. Ghaemmaghami
- Immunology and Immuno-Bioengineering Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - David Eglin
- Regenerative Orthopaedics, AO Research Institute, Davos, Switzerland
- Ecole des Mines Saint-Etienne, Saint-Étienne, France
| | - Alvaro Mata
- School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
- Biodiscovery Institute, University of Nottingham, Nottingham, United Kingdom
- Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham, United Kingdom
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10
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Boot W, Foster AL, Guillaume O, Eglin D, Schmid T, D’Este M, Zeiter S, Richards RG, Moriarty TF. An Antibiotic-Loaded Hydrogel Demonstrates Efficacy as Prophylaxis and Treatment in a Large Animal Model of Orthopaedic Device-Related Infection. Front Cell Infect Microbiol 2022; 12:826392. [PMID: 35573772 PMCID: PMC9093643 DOI: 10.3389/fcimb.2022.826392] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
Local antibiotic therapy is increasingly being recognised for its role in preventing and treating orthopaedic device-related infection (ODRI). A bioresorbable, injectable gentamicin-loaded hydrogel has been developed to deliver local antibiotics at the time of surgery with potential for both prevention and treatment of ODRI. In a prophylaxis model, the antibiotic hydrogel was compared with systemic perioperative antibiotic prophylaxis alone in twelve sheep (six per group) at the time of intramedullary (IM) nail insertion to the tibia, which was inoculated with methicillin-sensitive Staphylococcus aureus (MSSA). In a treatment model of single-stage revision surgery, adjunctive antibiotic-loaded hydrogel was compared with systemic antibiotics alone in a single stage revision of MSSA infection associated with a tibia intramedullary nail in eleven sheep (five/six per group). The primary endpoint was quantitative microbiological results of soft tissue, bone and sonicate fluid from explanted hardware at the time of euthanasia. At euthanasia, the control sheep that received no local antibiotics in the prophylaxis model were all culture-positive (median 1x108, range 7x106-3x108 colony forming units, CFU) while only two of six sheep receiving local gentamicin had any culture positive biopsies (median 1x101, range 0 - 1x105 CFU). For the treatment model, sheep receiving only systemic antibiotics were all culture-positive (median 8x105, range 2x103- 9x106 CFU) while only two of six sheep treated with gentamicin-loaded hydrogel had any culture positive biopsies (median 3x102, range 0 - 7x104 CFU). Local gentamicin concentrations measured in extracellular fluid in the tibial canal show a burst release of gentamicin from the hydrogel. Serum gentamicin concentrations peaked in both models at one day post application and were below detection limit thereafter. This study has demonstrated the effective use of a locally delivered antibiotic hydrogel for both the prevention and treatment of ODRI that is superior to that of systemic antibiotics alone. Future studies will endeavour to translate from preclinical to clinical research trials.
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Affiliation(s)
| | - Andrew Lewis Foster
- AO Research Institute Davos, Davos, Switzerland
- Queensland University of Technology Centre for Biomedical Technologies, Brisbane, QLD, Australia
- Jamieson Trauma Institute, Metro North Hospital and Health Service, Brisbane, QLD, Australia
- Department of Orthopaedic Surgery, Redcliffe Hospital, Queensland Health, Brisbane, QLD, Australia
| | | | - David Eglin
- AO Research Institute Davos, Davos, Switzerland
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11
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Guo W, Douma L, Hu MH, Eglin D, Alini M, Šećerović A, Grad S, Peng X, Zou X, D'Este M, Peroglio M. Hyaluronic acid-based interpenetrating network hydrogel as a cell carrier for nucleus pulposus repair. Carbohydr Polym 2022; 277:118828. [PMID: 34893245 DOI: 10.1016/j.carbpol.2021.118828] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [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: 06/04/2021] [Revised: 10/08/2021] [Accepted: 10/27/2021] [Indexed: 01/19/2023]
Abstract
Hyaluronic acid (HA) is a key component of the intervertebral disc (IVD) that is widely investigated as an IVD biomaterial. One persisting challenge is introducing materials capable of supporting cell encapsulation and function, yet with sufficient mechanical stability. In this study, a hybrid interpenetrating polymer network (IPN) was produced as a non-covalent hydrogel, based on a covalently cross-linked HA (HA-BDDE) and HA-poly(N-isopropylacrylamide) (HA-pNIPAM). The hybrid IPN was investigated for its physicochemical properties, with histology and gene expression analysis to determine matrix deposition in vitro and in an ex vivo model. The IPN hydrogel displayed cohesiveness for at least one week and rheological properties resembling native nucleus pulposus (NP) tissue. When implanted in an ex vivo IVD organ culture model, the IPN supported cell viability, phenotype expression of encapsulated NP cells and IVD matrix production over four weeks under physiological loading. Overall, our results indicate the therapeutic potential of this HA-based IPN hydrogel for IVD regeneration.
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Affiliation(s)
- Wei Guo
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland; Department of Spinal Surgery, Orthopaedic Research Institute, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China; Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Luzia Douma
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Ming Hsien Hu
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Amra Šećerović
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Sibylle Grad
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Xinsheng Peng
- Department of Spinal Surgery, Orthopaedic Research Institute, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China; Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Xuenong Zou
- Department of Spinal Surgery, Orthopaedic Research Institute, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China; Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, PR China
| | - Matteo D'Este
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland.
| | - Marianna Peroglio
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
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12
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Cognasse F, Hamzeh-Cognasse H, Mismetti P, Thomas T, Eglin D, Marotte H. The Non-Haemostatic Response of Platelets to Stress: An Actor of the Inflammatory Environment on Regenerative Medicine? Front Immunol 2021; 12:741988. [PMID: 34589090 PMCID: PMC8473800 DOI: 10.3389/fimmu.2021.741988] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/27/2021] [Indexed: 12/12/2022] Open
Affiliation(s)
- Fabrice Cognasse
- Etablissement Français du Sang Auvergne-Rhône-Alpes, Saint-Etienne, France.,SAINBIOSE, INSERM, U1059, University of Lyon, Saint-Etienne, France
| | | | - Patrick Mismetti
- SAINBIOSE, INSERM, U1059, University of Lyon, Saint-Etienne, France.,Vascular and Therapeutic Medicine Department, Saint-Etienne University Hospital Center, Saint-Etienne, France
| | - Thierry Thomas
- SAINBIOSE, INSERM, U1059, University of Lyon, Saint-Etienne, France.,Department of Rheumatology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - David Eglin
- Mines Saint-Étienne, Univ Lyon, Univ Jean Monnet, INSERM, U1059 Sainbiose, Saint-Étienne, France
| | - Hubert Marotte
- SAINBIOSE, INSERM, U1059, University of Lyon, Saint-Etienne, France.,Department of Rheumatology, University Hospital of Saint-Etienne, Saint-Etienne, France
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13
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Bagnol R, Sprecher C, Peroglio M, Chevalier J, Mahou R, Büchler P, Richards G, Eglin D. Coaxial micro-extrusion of a calcium phosphate ink with aqueous solvents improves printing stability, structure fidelity and mechanical properties. Acta Biomater 2021; 125:322-332. [PMID: 33631396 DOI: 10.1016/j.actbio.2021.02.022] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 02/13/2021] [Accepted: 02/16/2021] [Indexed: 01/11/2023]
Abstract
Micro-extrusion-based 3D printing of complex geometrical and porous calcium phosphate (CaP) can improve treatment of bone defects through the production of personalized bone substitutes. However, achieving printing and post-printing shape stabilities for the efficient fabrication and application of rapid hardening protocol are still challenging. In this work, the coaxial printing of a self-setting CaP cement with water and ethanol mixtures aiming to increase the ink yield stress upon extrusion and the stability of fabricated structures was explored. Printing height of overhang structure was doubled when aqueous solvents were used and a 2 log increase of the stiffness was achieved post-printing. A standard and fast steam sterilization protocol applied as hardening step on the coaxial printed CaP cement (CPC) ink resulted in constructs with 4 to 5 times higher compressive moduli in comparison to extrusion process in the absence of solvent. This improved mechanical performance is likely due to rapid CPC setting, preventing cracks formation during hardening process. Thus, coaxial micro-extrusion-based 3D printing of a CPC ink with aqueous solvent enhances printability and allows the use of the widespread steam sterilization cycle as a standalone post-processing technique for production of 3D printed personalized CaP bone substitutes. STATEMENT OF SIGNIFICANCE: Coaxial micro-extrusion-based 3D printing of a self-setting CaP cement with water:ethanol mixtures increased the ink yield stress upon extrusion and the stability of fabricated structures. Printing height of overhang structure was doubled when aqueous solvents were used, and a 2 orders of magnitude log increase of the stiffness was achieved post-printing. A fast hardening step consisting of a standard steam sterilization was applied. Four to 5 times higher compressive moduli was obtained for hardened coaxially printed constructs. This improved mechanical performance is likely due to rapid CPC setting in the coaxial printing, preventing cracks formation during hardening process.
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Affiliation(s)
- Romain Bagnol
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland; Department of Biomaterials Science and Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands
| | - Christoph Sprecher
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Marianna Peroglio
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Jerome Chevalier
- University of Lyon, INSA-Lyon, CNRS, MATEIS UMR 5510, F-69621, Villeurbanne, France
| | | | - Philippe Büchler
- ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland
| | - Geoff Richards
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland; Department of Biomaterials Science and Technology, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands.
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14
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Weitkamp JT, Wöltje M, Nußpickel B, Schmidt FN, Aibibu D, Bayer A, Eglin D, Armiento AR, Arnold P, Cherif C, Lucius R, Smeets R, Kurz B, Behrendt P. Silk Fiber-Reinforced Hyaluronic Acid-Based Hydrogel for Cartilage Tissue Engineering. Int J Mol Sci 2021; 22:ijms22073635. [PMID: 33807323 PMCID: PMC8036422 DOI: 10.3390/ijms22073635] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/21/2021] [Accepted: 03/25/2021] [Indexed: 12/17/2022] Open
Abstract
A continuing challenge in cartilage tissue engineering for cartilage regeneration is the creation of a suitable synthetic microenvironment for chondrocytes and tissue regeneration. The aim of this study was to develop a highly tunable hybrid scaffold based on a silk fibroin matrix (SM) and a hyaluronic acid (HA) hydrogel. Human articular chondrocytes were embedded in a porous 3-dimensional SM, before infiltration with tyramine modified HA hydrogel. Scaffolds were cultured in chondropermissive medium with and without TGF-β1. Cell viability and cell distribution were assessed using CellTiter-Blue assay and Live/Dead staining. Chondrogenic marker expression was detected using qPCR. Biosynthesis of matrix compounds was analyzed by dimethylmethylene blue assay and immuno-histology. Differences in biomaterial stiffness and stress relaxation were characterized using a one-step unconfined compression test. Cell morphology was investigated by scanning electron microscopy. Hybrid scaffold revealed superior chondro-inductive and biomechanical properties compared to sole SM. The presence of HA and TGF-β1 increased chondrogenic marker gene expression and matrix deposition. Hybrid scaffolds offer cytocompatible and highly tunable properties as cell-carrier systems, as well as favorable biomechanical properties.
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Affiliation(s)
- Jan-Tobias Weitkamp
- Department of Anatomy, Christian-Albrechts-University Kiel, 24118 Kiel, Germany; (B.N.); (A.B.); (P.A.); (R.L.); (B.K.)
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
- Correspondence:
| | - Michael Wöltje
- Institute of Textile Machinery and High Performance Material Technology, 01069 Dresden, Germany; (M.W.); (D.A.); (C.C.)
| | - Bastian Nußpickel
- Department of Anatomy, Christian-Albrechts-University Kiel, 24118 Kiel, Germany; (B.N.); (A.B.); (P.A.); (R.L.); (B.K.)
| | - Felix N. Schmidt
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 22529 Hamburg, Germany;
| | - Dilbar Aibibu
- Institute of Textile Machinery and High Performance Material Technology, 01069 Dresden, Germany; (M.W.); (D.A.); (C.C.)
| | - Andreas Bayer
- Department of Anatomy, Christian-Albrechts-University Kiel, 24118 Kiel, Germany; (B.N.); (A.B.); (P.A.); (R.L.); (B.K.)
| | - David Eglin
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059 Sainbiose, Centre CIS, F-42023 Saint-Etienne, France;
| | | | - Philipp Arnold
- Department of Anatomy, Christian-Albrechts-University Kiel, 24118 Kiel, Germany; (B.N.); (A.B.); (P.A.); (R.L.); (B.K.)
- Institute of Functional and Clinical Anatomy, Friedrich-Alexander University Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Chokri Cherif
- Institute of Textile Machinery and High Performance Material Technology, 01069 Dresden, Germany; (M.W.); (D.A.); (C.C.)
| | - Ralph Lucius
- Department of Anatomy, Christian-Albrechts-University Kiel, 24118 Kiel, Germany; (B.N.); (A.B.); (P.A.); (R.L.); (B.K.)
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20251 Ham-burg, Germany
| | - Bodo Kurz
- Department of Anatomy, Christian-Albrechts-University Kiel, 24118 Kiel, Germany; (B.N.); (A.B.); (P.A.); (R.L.); (B.K.)
| | - Peter Behrendt
- Clinic for Orthopedic and Trauma Surgery, University Medical Center Schleswig-Holstein, Campus Kiel, 24015 Kiel, Germany;
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15
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Guex AG, Di Marzio N, Eglin D, Alini M, Serra T. The waves that make the pattern: a review on acoustic manipulation in biomedical research. Mater Today Bio 2021; 10:100110. [PMID: 33997761 PMCID: PMC8094912 DOI: 10.1016/j.mtbio.2021.100110] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/19/2021] [Accepted: 03/13/2021] [Indexed: 02/06/2023] Open
Abstract
Novel approaches, combining technology, biomaterial design, and cutting-edge cell culture, have been increasingly considered to advance the field of tissue engineering and regenerative medicine. Within this context, acoustic manipulation to remotely control spatial cellular organization within a carrier matrix has arisen as a particularly promising method during the last decade. Acoustic or sound-induced manipulation takes advantage of hydrodynamic forces exerted on systems of particles within a liquid medium by standing waves. Inorganic or organic particles, cells, or organoids assemble within the nodes of the standing wave, creating distinct patterns in response to the applied frequency and amplitude. Acoustic manipulation has advanced from micro- or nanoparticle arrangement in 2D to the assembly of multiple cell types or organoids into highly complex in vitro tissues. In this review, we discuss the past research achievements in the field of acoustic manipulation with particular emphasis on biomedical application. We survey microfluidic, open chamber, and high throughput devices for their applicability to arrange non-living and living units in buffer or hydrogels. We also investigate the challenges arising from different methods, and their prospects to gain a deeper understanding of in vitro tissue formation and application in the field of biomedical engineering. Work on sound waves to spatially control particulate systems is reviewed. Classification of surface acoustic waves, bulk acoustic waves, and Faraday waves. Sound can be used to arrange, separate, or filter polymer particles. Sound can pattern cells in 3D to induce morphogenesis. Long-term applied sound induces differentiation and tissue formation.
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Affiliation(s)
- A G Guex
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - N Di Marzio
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland.,Department of Health Sciences, Università del Piemonte Orientale (UPO), Novara, Italy
| | - D Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - M Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - T Serra
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
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16
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Xu Y, Yin H, Chu J, Eglin D, Serra T, Docheva D. An anisotropic nanocomposite hydrogel guides aligned orientation and enhances tenogenesis of human tendon stem/progenitor cells. Biomater Sci 2021; 9:1237-1245. [PMID: 33576754 DOI: 10.1039/d0bm01127d] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The uniform and aligned arrangement of tendon cells is a marker of tendon tissue morphology and the embodiment of its biological anisotropy. However, most of the hydrogels used for tendon tissue engineering do not present anisotropic structures. In this work, a magnetically-responsive nanocomposite hydrogel composed of collagen type I (COL I) and aligned iron oxide nanoparticles (IOPs) was investigated for potential application in tendon tissue engineering. COL I with a mixture of remotely aligned IOPs (A/IOPs) and human tendon stem/progenitor cells (COL I-A/IOPs-hTSPCs) was prepared and the alignment of IOPs was induced under a remote magnetic field. Following the gelation of COL I, a stable and anisotropic nanocomposite COL I-A/IOPs hydrogel was formed. In addition, hTSPCs embedded in COL I with random IOPs (COL I-R/IOPs-hTSPCs) and in pure COL I (COL I-hTSPCs) were used as control groups. Cell viability, proliferation, morphology, cell row formation, and alignment of IOPs and hTSPCs were evaluated over time. In addition, a comprehensive gene expression profile of 48 different genes, including tendon-related genes and lineage/cross-linking genes, was obtained by implementing designer quantitative RT-PCR plates. The hTSPCs morphology followed the orientation of the anisotropic COL I-A/IOPs hydrogel with increased row formation in comparison to pristine COL I and COL-R/IOPs. Moreover, higher proliferation rate and significant upregulation of tendon gene markers were measured in comparison to hTSPCs cultivated in the COL I-R/IOPs and COL I. Thus, we suggest that providing the cells with aligned focal contact points, namely the aligned IOPs, is sufficient to provoke an immense effect on the formation of aligned cell rows. Taken together, we report a novel strategy for directing stem cell behavior without the use of exogenous growth factors or pre-aligned COL I fibers, and propose that anisotropic nanocomposite hydrogels hold great potential for tendon tissue engineering applications.
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Affiliation(s)
- Yichi Xu
- AO Research Institute Davos, Clavadelerstrasse 8, Davos Platz, Switzerland.
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17
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Foster AL, Boot W, Stenger V, D'Este M, Jaiprakash A, Eglin D, Zeiter S, Richards RG, Moriarty TF. Single-stage revision of MRSA orthopedic device-related infection in sheep with an antibiotic-loaded hydrogel. J Orthop Res 2021; 39:438-448. [PMID: 33305875 DOI: 10.1002/jor.24949] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 02/04/2023]
Abstract
Local antimicrobial therapy is an integral aspect of treating orthopedic device-related infection (ODRI), which is conventionally administered via polymethyl-methacrylate (PMMA) bone cement. PMMA, however, is limited by a suboptimal antibiotic release profile and a lack of biodegradability. In this study, we compare the efficacy of PMMA versus an antibiotic-loaded hydrogel in a single-stage revision for chronic methicillin-resistant Staphylococcus aureus (MRSA) ODRI in sheep. Antibiofilm activity of the antibiotic combination (gentamicin and vancomycin) was determined in vitro. Swiss alpine sheep underwent a single-stage revision of a tibial intramedullary nail with MRSA infection. Local gentamicin and vancomycin therapy was delivered via hydrogel or PMMA (n = 5 per group), in conjunction with systemic antibiotic therapy. In vivo observations included: local antibiotic tissue concentration, renal and liver function tests, and quantitative microbiology on tissues and hardware post-mortem. There was a nonsignificant reduction in biofilm with an increasing antibiotic concentration in vitro (p = 0.12), confirming the antibiotic tolerance of the MRSA biofilm. In the in vivo study, four out of five sheep from each treatment group were culture-negative. Antibiotic delivery via hydrogel resulted in 10-100 times greater local concentrations for the first 2-3 days compared with PMMA and were comparable thereafter. Systemic concentrations of gentamicin were minimal or undetectable in both groups, while renal and liver function tests were within normal limits. This study shows that a single-stage revision with hydrogel or PMMA is equally effective, although the hydrogel offers certain practical benefits over PMMA, which make it an attractive proposition for clinical use.
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Affiliation(s)
- Andrew L Foster
- AO Research Institute Davos, Davos, Switzerland
- Queensland University of Technology (QUT), Faculty of Science and Engineering, Brisbane, Queensland, Australia
- Department of Orthopaedic Surgery and Jamieson Trauma Institute, Royal Brisbane and Women's Hospital Australia, Brisbane, Queensland, Australia
| | | | | | | | - Anjali Jaiprakash
- Queensland University of Technology (QUT), Faculty of Science and Engineering, Brisbane, Queensland, Australia
| | - David Eglin
- AO Research Institute Davos, Davos, Switzerland
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18
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Sennett M, Friedman J, Ashley B, Stoeckl B, Patel J, Alini M, Cucchiarini M, Eglin D, Madry H, Mata A, Semino C, Stoddart M, Johnstone B, Moutos F, Estes B, Guilak F, Mauck R, Dodge G. Long term outcomes of biomaterial-mediated repair of focal cartilage defects in a large animal model. Eur Cell Mater 2021; 41:40-51. [PMID: 33411938 PMCID: PMC8626827 DOI: 10.22203/ecm.v041a04] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The repair of focal cartilage defects remains one of the foremost issues in the field of orthopaedics. Chondral defects may arise from a variety of joint pathologies and left untreated, will likely progress to osteoarthritis. Current repair techniques, such as microfracture, result in short-term clinical improvements but have poor long-term outcomes. Emerging scaffold-based repair strategies have reported superior outcomes compared to microfracture and motivate the development of new biomaterials for this purpose. In this study, unique composite implants consisting of a base porous reinforcing component (woven poly(ε-caprolactone)) infiltrated with 1 of 2 hydrogels (self-assembling peptide or thermo-gelling hyaluronan) or bone marrow aspirate were evaluated. The objective was to evaluate cartilage repair with composite scaffold treatment compared to the current standard of care (microfracture) in a translationally relevant large animal model, the Yucatan minipig. While many cartilage-repair studies have shown some success in vivo, most are short term and not clinically relevant. Informed by promising 6-week findings, a 12-month study was carried out and those results are presented here. To aid in comparisons across platforms, several structural and functionally relevant outcome measures were performed. Despite positive early findings, the long-term results indicated less than optimal structural and mechanical results with respect to cartilage repair, with all treatment groups performing worse than the standard of care. This study is important in that it brings much needed attention to the importance of performing translationally relevant long-term studies in an appropriate animal model when developing new clinical cartilage repair approaches.
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Affiliation(s)
- M.L. Sennett
- Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - J.M. Friedman
- Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - B.S. Ashley
- Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - B.D. Stoeckl
- Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - J.M. Patel
- Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - M. Alini
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,AO Research Institute Davos, Davos Platz, Switzerland
| | - M. Cucchiarini
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,Centre of Experimental Orthopaedics, Saarland University Medical Centre, Homburg/Saar, Germany
| | - D. Eglin
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,AO Research Institute Davos, Davos Platz, Switzerland
| | - H. Madry
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,Centre of Experimental Orthopaedics, Saarland University Medical Centre, Homburg/Saar, Germany
| | - A. Mata
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,School of Pharmacy, University of Nottingham, UK,Department of Chemical and Environmental Engineering, University of Nottingham, UK
| | - C. Semino
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,Tissue Engineering Laboratory, Bioengineering Department, IQS School of Engineering, Universitat Ramon Llull, Barcelona, Spain
| | - M.J. Stoddart
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,AO Research Institute Davos, Davos Platz, Switzerland
| | - B. Johnstone
- Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, OR, USA
| | | | | | - F. Guilak
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,Cytex Therapeutics, Durham, NC, USA,Washington University and Shriners Hospitals for Children, St. Louis, MO, USA
| | - R.L. Mauck
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - G.R. Dodge
- Acute Cartilage Injury Consortium, AO Exploratory Research Collaborative Research Program, Davos Platz, Switzerland,Translational Musculoskeletal Research Center, CMC VA Medical Center, Philadelphia, PA, USA,Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA,Address for correspondence: George R. Dodge, 379A Stemmler Hall, 36th Street and Hamilton Walk, Philadelphia, PA 19104-6081, USA. Telephone number: +1 2155731514 Fax number: +1 2155732133
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19
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Gowda AH, Bu Y, Kudina O, Krishna KV, Bohara RA, Eglin D, Pandit A. Design of tunable gelatin-dopamine based bioadhesives. Int J Biol Macromol 2020; 164:1384-1391. [DOI: 10.1016/j.ijbiomac.2020.07.195] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 11/28/2022]
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20
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Ziadlou R, Rotman S, Teuschl A, Salzer E, Barbero A, Martin I, Alini M, Eglin D, Grad S. Optimization of hyaluronic acid-tyramine/silk-fibroin composite hydrogels for cartilage tissue engineering and delivery of anti-inflammatory and anabolic drugs. Mater Sci Eng C Mater Biol Appl 2020; 120:111701. [PMID: 33545860 DOI: 10.1016/j.msec.2020.111701] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/21/2020] [Accepted: 11/02/2020] [Indexed: 12/28/2022]
Abstract
Injury of articular cartilage leads to an imbalance in tissue homeostasis, and due to the poor self-healing capacity of cartilage the affected tissue often exhibits osteoarthritic changes. In recent years, injectable and highly tunable composite hydrogels for cartilage tissue engineering and drug delivery have been introduced as a desirable alternative to invasive treatments. In this study, we aimed to formulate injectable hydrogels for drug delivery and cartilage tissue engineering by combining different concentrations of hyaluronic acid-tyramine (HA-Tyr) with regenerated silk-fibroin (SF) solutions. Upon enzymatic crosslinking, the gelation and mechanical properties were characterized over time. To evaluate the effect of the hydrogel compositions and properties on extracellular matrix (ECM) deposition, bovine chondrocytes were embedded in enzymatically crosslinked HA-Tyr/SF composites (in further work abbreviated as HA/SF) or HA-Tyr hydrogels. We demonstrated that all hydrogel formulations were cytocompatible and could promote the expression of cartilage matrix proteins allowing chondrocytes to produce ECM, while the most prominent chondrogenic effects were observed in hydrogels with HA20/SF80 polymeric ratios. Unconfined mechanical testing showed that the compressive modulus for HA20/SF80 chondrocyte-laden constructs was increased almost 10-fold over 28 days of culture in chondrogenic medium which confirmed the superior production of ECM in this hydrogel compared to other hydrogels in this study. Furthermore, in hydrogels loaded with anabolic and anti-inflammatory drugs, HA20/SF80 hydrogel showed the longest and the most sustained release profile over time which is desirable for the long treatment duration typically necessary for osteoarthritic joints. In conclusion, HA20/SF80 hydrogel was successfully established as a suitable injectable biomaterial for cartilage tissue engineering and drug delivery applications.
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Affiliation(s)
- Reihane Ziadlou
- AO Research Institute Davos, Davos Platz 7270, Switzerland; Department of Biomedical Engineering, University of Basel, Allschwil 4123, Switzerland
| | - Stijn Rotman
- AO Research Institute Davos, Davos Platz 7270, Switzerland
| | - Andreas Teuschl
- Department of Biochemical Engineering, University of Applied Sciences Technikum Wien, 1200 Vienna, Austria
| | - Elias Salzer
- Department of Biochemical Engineering, University of Applied Sciences Technikum Wien, 1200 Vienna, Austria; Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Andrea Barbero
- Department of Biomedical Engineering, University of Basel, Allschwil 4123, Switzerland
| | - Ivan Martin
- Department of Biomedical Engineering, University of Basel, Allschwil 4123, Switzerland; Department of Biomedicine, University Hospital Basel, University of Basel, Basel 4001, Switzerland
| | - Mauro Alini
- AO Research Institute Davos, Davos Platz 7270, Switzerland
| | - David Eglin
- AO Research Institute Davos, Davos Platz 7270, Switzerland
| | - Sibylle Grad
- AO Research Institute Davos, Davos Platz 7270, Switzerland; Department of Health Sciences and Technology, ETH Zürich, Zürich 8092, Switzerland.
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21
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Abstract
Three-dimensional bioprinting uses additive manufacturing techniques for the automated fabrication of hierarchically organized living constructs. The building blocks are often hydrogel-based bioinks, which need to be printed into structures with high shape fidelity to the intended computer-aided design. For optimal cell performance, relatively soft and printable inks are preferred, although these undergo significant deformation during the printing process, which may impair shape fidelity. While the concept of good or poor printability seems rather intuitive, its quantitative definition lacks consensus and depends on multiple rheological and chemical parameters of the ink. This review discusses qualitative and quantitative methodologies to evaluate printability of bioinks for extrusion- and lithography-based bioprinting. The physicochemical parameters influencing shape fidelity are discussed, together with their importance in establishing new models, predictive tools and printing methods that are deemed instrumental for the design of next-generation bioinks, and for reproducible comparison of their structural performance.
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Affiliation(s)
- Andrea Schwab
- AO
Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Riccardo Levato
- Department
of Orthopaedics, University Medical Center
Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
- Department
of Clinical Sciences, Faculty of Veterinary
Medicine, Utrecht University, Yalelaan 1, 3584 CL, Utrecht, The Netherlands
| | - Matteo D’Este
- AO
Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Susanna Piluso
- Department
of Orthopaedics, University Medical Center
Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
- Department
of Developmental BioEngineering, Technical Medical Centre, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - David Eglin
- AO
Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Jos Malda
- Department
of Orthopaedics, University Medical Center
Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
- Department
of Clinical Sciences, Faculty of Veterinary
Medicine, Utrecht University, Yalelaan 1, 3584 CL, Utrecht, The Netherlands
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22
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Jahangir S, Eglin D, Pötter N, Khozaei Ravari M, Stoddart MJ, Samadikuchaksaraei A, Alini M, Baghaban Eslaminejad M, Safa M. Inhibition of hypertrophy and improving chondrocyte differentiation by MMP-13 inhibitor small molecule encapsulated in alginate-chondroitin sulfate-platelet lysate hydrogel. Stem Cell Res Ther 2020; 11:436. [PMID: 33036643 PMCID: PMC7545577 DOI: 10.1186/s13287-020-01930-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 09/08/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Mesenchymal stem cells are a promising cell source for chondrogenic differentiation and have been widely used in several preclinical and clinical studies. However, they are prone to an unwanted differentiation process towards hypertrophy that limits their therapeutic efficacy. Matrix metallopeptidase 13 (MMP-13) is a well-known factor regulated during this undesirable event. MMP-13 is a collagen degrading enzyme, which is also highly expressed in the hypertrophic zone of the growth plate and in OA cartilage. Accordingly, we investigated the effect of MMP-13 inhibition on MSC hypertrophy. METHODS In this study, 5-bromoindole-2-carboxylic acid (BICA) was used as an inhibitory agent for MMP-13 expression. After identifying its optimal concentration, BICA was mixed into a hydrogel and the release rate was studied. To prepare the ideal hydrogel, chondroitin sulfate (CS) and platelet lysate (PL) were mixed with sodium alginate (Alg) at concentrations selected based on synergistic mechanical and rheometric properties. Then, four hydrogels were prepared by combining alginate (1.5%w/v) and/or CS (1%w/v) and/or PL (20%v/v). The chondrogenic potential and progression to hypertrophy of human bone marrow-derived mesenchymal stem cell (hBM-MSC)-loaded hydrogels were investigated under free swelling and mechanical loading conditions, in the presence and absence of BICA. RESULTS Viability of hBM-MSCs seeded in the four hydrogels was similar. qRT-PCR revealed that BICA could successfully inhibit MMP-13 expression, which led to an inhibition of Coll X and induction of Coll-II, in both free swelling and loading conditions. The GAG deposition was higher in the group combining BICA and mechanical stimulation. CONCLUSIONS It is concluded that BICA inhibition of MMP-13 reduces MSC hypertrophy during chondrogenesis.
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Affiliation(s)
- Shahrbanoo Jahangir
- Department of Tissue engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
| | - Naomi Pötter
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
- Department of orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center Albert-Ludwigs University, Albert-Ludwigs University of Freiburg, Freiburg im Breisgau, Germany
| | - Mojtaba Khozaei Ravari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Martin J Stoddart
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
- Department of orthopedics and Trauma Surgery, Faculty of Medicine, Medical Center Albert-Ludwigs University, Albert-Ludwigs University of Freiburg, Freiburg im Breisgau, Germany
| | - Ali Samadikuchaksaraei
- Department of Tissue engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland.
| | - Mohammadreza Baghaban Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Science Research Center Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
| | - Majid Safa
- Department of Tissue engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran.
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.
- Department of Hematology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran.
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23
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Petta D, Basoli V, Pellicciotta D, Tognato R, Barcik JP, Arrigoni C, Della Bella E, Armiento AR, Candrian C, Richards GR, Alini M, Moretti M, Eglin D, Serra T. Sound-induced morphogenesis of multicellular systems for rapid orchestration of vascular networks. Biofabrication 2020; 13. [PMID: 32977317 DOI: 10.1088/1758-5090/abbb9c] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [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: 06/25/2020] [Accepted: 09/25/2020] [Indexed: 12/19/2022]
Abstract
Morphogenesis, a complex process, ubiquitous in developmental biology and many pathologies, is based on self-patterning of cells. Spatial patterns of cells, organoids, or inorganic particles can be forced on demand using acoustic surface standing waves, such as the Faraday waves. This technology allows tuning of parameters (sound frequency, amplitude, chamber shape) under contactless, fast and mild culture conditions, for morphologically relevant tissue generation. We call this method Sound Induced Morphogenesis (SIM). In this work, we use SIM to achieve tight control over patterning of endothelial cells and mesenchymal stem cells densities within a hydrogel, with the endpoint formation of vascular structures. Here, we first parameterize our system to produce enhanced cell density gradients. Second, we allow for vasculogenesis after SIM patterning control and compare our controlled technology against state-of-the-art microfluidic culture systems, the latter characteristic of pure self-organized patterning and uniform initial density. Our sound-induced cell density patterning and subsequent vasculogenesis requires less cells than the microfluidic chamber. We advocate for the use of SIM for rapid, mild, and reproducible morphogenesis induction and further explorations in the regenerative medicine and cell therapy fields.
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Affiliation(s)
- Dalila Petta
- Regenerative Medicine Technologis Lab, Ente Ospedaliero Cantonale, Lugano, SWITZERLAND
| | - Valentina Basoli
- AO Research Institute Davos, Davos Platz, Graubünden, SWITZERLAND
| | | | - Riccardo Tognato
- AO Research Institute Davos, Davos Platz, Graubünden, SWITZERLAND
| | - Jan P Barcik
- AO Research Institute Davos, Davos Platz, Graubünden, SWITZERLAND
| | - Chiara Arrigoni
- Regenerative Medicine Technologis Lab, Ente Ospedaliero Cantonale, Lugano, SWITZERLAND
| | | | | | - Christian Candrian
- Unità di Traumatologia e Ortopedia, Ente Ospedaliero Cantonale, Lugano, SWITZERLAND
| | - Geoff R Richards
- AO Research Institute Davos, Davos Platz, Graubünden, SWITZERLAND
| | - Mauro Alini
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Graubünden, SWITZERLAND
| | - Matteo Moretti
- Regenerative Medicine Technologies Laboratory, Ente Ospedaliero Cantonale, Lugano, SWITZERLAND
| | - David Eglin
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Graubünden, SWITZERLAND
| | - Tiziano Serra
- AO Research Institute Davos, Davos Platz, Graubünden, SWITZERLAND
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24
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Rotman SG, Sumrall E, Ziadlou R, Grijpma DW, Richards RG, Eglin D, Moriarty TF. Local Bacteriophage Delivery for Treatment and Prevention of Bacterial Infections. Front Microbiol 2020; 11:538060. [PMID: 33072008 PMCID: PMC7531225 DOI: 10.3389/fmicb.2020.538060] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 02/26/2020] [Accepted: 08/25/2020] [Indexed: 12/18/2022] Open
Abstract
As viruses with high specificity for their bacterial hosts, bacteriophages (phages) are an attractive means to eradicate bacteria, and their potential has been recognized by a broad range of industries. Against a background of increasing rates of antibiotic resistance in pathogenic bacteria, bacteriophages have received much attention as a possible "last-resort" strategy to treat infections. The use of bacteriophages in human patients is limited by their sensitivity to acidic pH, enzymatic attack and short serum half-life. Loading phage within a biomaterial can shield the incorporated phage against many of these harmful environmental factors, and in addition, provide controlled release for prolonged therapeutic activity. In this review, we assess the different classes of biomaterials (i.e., biopolymers, synthetic polymers, and ceramics) that have been used for phage delivery and describe the processing methodologies that are compatible with phage embedding or encapsulation. We also elaborate on the clinical or pre-clinical data generated using these materials. While a primary focus is placed on the application of phage-loaded materials for treatment of infection, we also include studies from other translatable fields such as food preservation and animal husbandry. Finally, we summarize trends in the literature and identify current barriers that currently prevent clinical application of phage-loaded biomaterials.
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Affiliation(s)
- Stijn Gerard Rotman
- AO Research Institute Davos, AO Foundation, Davos, Switzerland.,MIRA Institute for Biomedical Engineering and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, Enschede, Netherlands
| | - Eric Sumrall
- AO Research Institute Davos, AO Foundation, Davos, Switzerland
| | - Reihane Ziadlou
- AO Research Institute Davos, AO Foundation, Davos, Switzerland.,Department of Biomedical Engineering, Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Dirk W Grijpma
- MIRA Institute for Biomedical Engineering and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, Enschede, Netherlands
| | | | - David Eglin
- AO Research Institute Davos, AO Foundation, Davos, Switzerland.,MIRA Institute for Biomedical Engineering and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, Enschede, Netherlands
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25
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Rotman SG, Moriarty TF, Nottelet B, Grijpma DW, Eglin D, Guillaume O. Poly(Aspartic Acid) Functionalized Poly(ϵ-Caprolactone) Microspheres with Enhanced Hydroxyapatite Affinity as Bone Targeting Antibiotic Carriers. Pharmaceutics 2020; 12:pharmaceutics12090885. [PMID: 32957602 PMCID: PMC7559286 DOI: 10.3390/pharmaceutics12090885] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 08/11/2020] [Revised: 09/08/2020] [Accepted: 09/14/2020] [Indexed: 12/11/2022] Open
Abstract
Bone infection is a feared complication for patients with surgically fixed bone fractures and local antibiotic delivery is important in prophylaxis and treatment of these infections. Recent studies indicated that Staphylococcus aureus can penetrate bone tissue through micron-sized canaliculi and evade systemic and currently available local antibiotic treatments. Targeting bacteria within the bone requires highly efficient delivery of antimicrobials to the infected bone tissue. In this work, a biodegradable microsphere carrier loaded with antibiotics and with specific affinity to bone mineral was developed. Two widely used antibiotics, i.e., Gentamicin-dioctyl sulfosuccinate (GM-AOT) and Ciprofloxacin (CF) were embedded in poly(ϵ-caprolactone) (PCL) microspheres fabricated by oil-in-water emulsion techniques with carboxylated poly(vinyl alcohol) (cPVA) as surfactant. The carboxylic acid groups present at the Poly(ϵ-caprolactone)/cPVA (PCL-cPVA) microsphere surface were functionalized with aspartic acid oligomers (ASP) granting bone targeting properties. We report on cPVA synthesis, microsphere formulation, and antibiotic loading of PCL/cPVA-ASP microspheres. Antibiotic loaded PCL/cPVA-ASP microspheres show sustained release of its antibiotic load and can inhibit bacterial growth in vitro for up to 6 days. PCL/cPVA-ASP microspheres show enhanced affinity to mineralized substrates compared to non-functionalized PCL/cPVA microspheres. These findings support further development of these bone targeting antibiotic carriers for potential treatment of persistent bone infections.
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Affiliation(s)
- Stijn G. Rotman
- AO Research Institute Davos, 7270 Davos Platz, Switzerland; (S.G.R.); (T.F.M.); (D.E.)
- Department of Biomaterials Science and Technology, Faculty of Science and Technology and Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands;
| | - Thomas F. Moriarty
- AO Research Institute Davos, 7270 Davos Platz, Switzerland; (S.G.R.); (T.F.M.); (D.E.)
| | - Benjamin Nottelet
- IBMM, University of Montpellier, CNRS, ENSCM, 34093 Montpellier, France;
| | - Dirk W. Grijpma
- Department of Biomaterials Science and Technology, Faculty of Science and Technology and Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands;
| | - David Eglin
- AO Research Institute Davos, 7270 Davos Platz, Switzerland; (S.G.R.); (T.F.M.); (D.E.)
- Department of Biomaterials Science and Technology, Faculty of Science and Technology and Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands;
| | - Olivier Guillaume
- Institute of Materials Science and Technology, TU Wien, 1060 Vienna, Austria
- Correspondence:
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26
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Buwalda S, Rotman S, Eglin D, Moriarty F, Bethry A, Garric X, Guillaume O, Nottelet B. Synergistic anti-fouling and bactericidal poly(ether ether ketone) surfaces via a one-step photomodification. Materials Science and Engineering: C 2020; 111:110811. [DOI: 10.1016/j.msec.2020.110811] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/13/2020] [Accepted: 03/02/2020] [Indexed: 01/23/2023]
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27
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Schwab A, Hélary C, Richards R, Alini M, Eglin D, D'Este M. Tissue mimetic hyaluronan bioink containing collagen fibers with controlled orientation modulating cell migration and alignment. Mater Today Bio 2020; 7:100058. [PMID: 32613184 PMCID: PMC7317236 DOI: 10.1016/j.mtbio.2020.100058] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [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: 04/07/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 12/22/2022] Open
Abstract
Biofabrication is providing scientists and clinicians the ability to produce engineered tissues with desired shapes and gradients of composition and biological cues. Typical resolutions achieved with extrusion-based bioprinting are at the macroscopic level. However, for capturing the fibrillar nature of the extracellular matrix (ECM), it is necessary to arrange ECM components at smaller scales, down to the micron and the molecular level. Herein, we introduce a bioink containing the tyramine derivative of hyaluronan (HA; henceforth known as THA) and collagen (Col) type 1. In this bioink, similar to connective tissues, Col is present in the fibrillar form, and HA functions as a viscoelastic space filler. THA was enzymatically cross-linked under mild conditions allowing simultaneous Col fibrillogenesis, thus achieving a homogeneous distribution of Col fibrils within the viscoelastic HA-based matrix. The THA-Col composite displayed synergistic properties in terms of storage modulus and shear thinning, translating into good printability. Shear-induced alignment of the Col fibrils along the printing direction was achieved and quantified via immunofluorescence and second-harmonic generation. Cell-free and cell-laden constructs were printed and characterized, analyzing the influence of the controlled microscopic anisotropy on human bone marrow-derived mesenchymal stromal cell (hMSC) migration. Anisotropic HA-Col showed cell-instructive properties modulating hMSC adhesion, morphology, and migration from micropellets stimulated by the presence and the orientation of Col fibers. Actin filament staining showed that hMSCs embedded in aligned constructs displayed increased cytoskeleton alignment along the fibril direction. Based on gene expression of cartilage/bone markers and ECM production, hMSCs embedded in the isotropic bioink displayed chondrogenic differentiation comparable with standard pellet culture by means of proteoglycan production (safranin O staining and proteoglycan quantification). The possibility of printing matrix components with control over microscopic alignment brings biofabrication one step closer to capturing the complexity of native tissues.
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Affiliation(s)
- A. Schwab
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
| | - C. Hélary
- Sorbonne Université, UPMC Laboratoire de Chimie de La Matière Condensée de Paris (LCMCP), Paris, France
| | - R.G. Richards
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
| | - M. Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
| | - D. Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
| | - M. D'Este
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland
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28
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Derkus B, Okesola BO, Barrett DW, D'Este M, Chowdhury TT, Eglin D, Mata A. Multicomponent hydrogels for the formation of vascularized bone-like constructs in vitro. Acta Biomater 2020; 109:82-94. [PMID: 32311533 DOI: 10.1016/j.actbio.2020.03.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 03/13/2020] [Accepted: 03/18/2020] [Indexed: 01/03/2023]
Abstract
The native extracellular matrix (ECM) is a complex gel-like system with a broad range of structural features and biomolecular signals. Hydrogel platforms that can recapitulate the complexity and signaling properties of this ECM would have enormous impact in fields ranging from tissue engineering to drug discovery. Here, we report on the design, synthesis, and proof-of-concept validation of a microporous and nanofibrous hydrogel exhibiting multiple bioactive epitopes designed to recreate key features of the bone ECM. The material platform integrates self-assembly with orthogonal enzymatic cross-linking to create a supramolecular environment comprising hyaluronic acid modified with tyramine (HA-Tyr) and peptides amphiphiles (PAs) designed to promote cell adhesion (RGDS-PA), osteogenesis (Osteo-PA), and angiogenesis (Angio-PA). Through individual and co-cultures of human adipose derived mesenchymal stem cells (hAMSCs) and human umbilical vascular endothelial cells (HUVECs), we confirmed the capacity of the HA-Tyr/RGDS-PA/Osteo-PA/Angio-PA hydrogel to promote cell adhesion as well as osteogenic and angiogenic differentiation in both 2D and 3D setups. Furthermore, using immunofluorescent staining and reverse transcription-quantitative polymerase chain reaction (RT-qPCR), we demonstrated co-differentiation and organization of hAMSCs and HUVECs into 3D aggregates resembling vascularized bone-like constructs. STATEMENT OF SIGNIFICANCE: This body of work presents a new approach to develop more complex, yet functional, in vitro environments for cell culture while enabling a high level of control, tuneability, and reproducibility. The multicomponent self-assembling bioactive 2D and 3D hydrogels with nanofibrous architecture designed to recreate key molecular and macromolecular features of the native bone ECM and promote both osteogenesis and angiogenesis. The materials induce endothelial cells towards large vascular lumens and MSCs into bone cells on/within the same platform and form vascularized-bone like construct in vitro. This strategy looks encouraging for lifelike bone tissue engineering in vitro and bone tissue regeneration in vivo.
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Pérez-Köhler B, Pascual G, Benito-Martínez S, Bellón JM, Eglin D, Guillaume O. Thermo-Responsive Antimicrobial Hydrogel for the In-Situ Coating of Mesh Materials for Hernia Repair. Polymers (Basel) 2020; 12:polym12061245. [PMID: 32486080 PMCID: PMC7362238 DOI: 10.3390/polym12061245] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 05/25/2020] [Accepted: 05/26/2020] [Indexed: 02/07/2023] Open
Abstract
The prophylactic coating of prosthetic mesh materials for hernia repair with antimicrobial compounds is commonly performed before implantation of the mesh in the abdominal wall. We propose a novel alternative, which is a rifampicin-loaded thermo-responsive hydrogel formulation, to be applied on the mesh after its implantation. This formulation becomes a gel in-situ once reached body temperature, allowing an optimal coating of the mesh along with the surrounding tissues. In vitro, the hydrogel cytotoxicity was assessed using rabbit fibroblasts and antimicrobial efficacy was determined against Staphylococcus aureus. An in vivo rabbit model of hernia repair was performed; implanted polypropylene meshes (5 × 2 cm) were challenged with S. aureus (106 CFU), for two study groups—unloaded (n = 4) and 0.1 mg/cm2 rifampicin-loaded hydrogel (n = 8). In vitro, antibacterial activity of the hydrogel lasted for 5 days, without sign of cytotoxicity. Fourteen days after implantation, meshes coated with drug-free hydrogel developed a strong infection and resulted in poor tissue integration. Coating meshes with the rifampicin-loaded hydrogel fully prevented implant infection and permitted an optimal tissue integration. Due to its great performance, this, degradable, thermo-responsive antimicrobial hydrogel could potentially be a strong prophylactic armamentarium to be combined with prosthesis in the surgical field.
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Affiliation(s)
- Bárbara Pérez-Köhler
- Department of Medicine and Medical Specialties, University of Alcalá, 28805 Madrid, Spain; (B.P.-K.); (G.P.)
- Biomedical Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain; (S.B.-M.); (J.M.B.)
- Ramón y Cajal Health Research Institute (IRYCIS), 28034 Madrid, Spain
| | - Gemma Pascual
- Department of Medicine and Medical Specialties, University of Alcalá, 28805 Madrid, Spain; (B.P.-K.); (G.P.)
- Biomedical Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain; (S.B.-M.); (J.M.B.)
- Ramón y Cajal Health Research Institute (IRYCIS), 28034 Madrid, Spain
| | - Selma Benito-Martínez
- Biomedical Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain; (S.B.-M.); (J.M.B.)
- Ramón y Cajal Health Research Institute (IRYCIS), 28034 Madrid, Spain
- Department of Surgery, Medical and Social Sciences, University of Alcalá, 28805 Madrid, Spain
| | - Juan Manuel Bellón
- Biomedical Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain; (S.B.-M.); (J.M.B.)
- Ramón y Cajal Health Research Institute (IRYCIS), 28034 Madrid, Spain
- Department of Surgery, Medical and Social Sciences, University of Alcalá, 28805 Madrid, Spain
| | - David Eglin
- AO Research Institute Davos, Davos 7270, Switzerland;
| | - Olivier Guillaume
- 3D Printing and Biofabrication Group, Institute of Materials Science and Technology, TU Wien, 1060 Vienna, Austria
- Correspondence:
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Abstract
Biofabrication is enriching the tissue engineering field with new ways of producing structurally organized complex tissues. Among the numerous bioinks under investigation, hyaluronic acid (HA) and its derivatives stand out for their biological relevance, cytocompatibility, shear-thinning properties, and potential to fine-tune the desired properties with chemical modification. In this paper, we review the recent advances on bioinks containing HA. The available literature is presented based on subjects including the rheological properties in connection with printability, the chemical strategies for endowing HA with the desired properties, the clinical application, the most advanced preclinical studies, the advantages and limitations in comparison with similar biopolymer-based bioinks, and future perspectives.
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Affiliation(s)
- D Petta
- AO Research Institute Davos, Davos Platz, Switzerland. Department of Biomaterials Science and Technology, University of Twente, Enschede, The Netherlands
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31
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Di Marzio N, Eglin D, Serra T, Moroni L. Bio-Fabrication: Convergence of 3D Bioprinting and Nano-Biomaterials in Tissue Engineering and Regenerative Medicine. Front Bioeng Biotechnol 2020; 8:326. [PMID: 32373603 PMCID: PMC7179330 DOI: 10.3389/fbioe.2020.00326] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 03/25/2020] [Indexed: 11/29/2022] Open
Abstract
3D Bioprinting (3DBP) technologies open many possibilities for the generation of highly complex cellularized constructs. Nano-biomaterials have been largely used in tissue engineering and regenerative medicine (TERM) for different purposes and functions depending on their intrinsic properties and how they have been presented in the biologic environment. Combination of bioprinting and nano-biomaterials paves the way for unexpected opportunities in the biofabrication scenario, by improving critical weakness of these manufacturing processes while enhancing their efficiency by spatially arranging nano-features. 3D organization of cells is fundamental for a successful design and maturation of native tissues. A critical challenge for the production of biological constructs is to support and guide cell growth toward their natural microenvironment, ensuring a harmonious presence of specific biochemical and biophysical cues to direct cell behavior. Also, precise arrays of stimuli need to be designed to induce stem cell differentiation toward specific tissues. Introducing nano-sized bioactive material can direct cell fate, playing a role in the differentiation process and leading to the biofabrication of functional structures. Nano-composite bio-ink can be used to generate cell instructive scaffolds or either directly printed with cells. In addition, the presence of nano-particles within 3D printed constructs can lead to control them through multiple external physical stimuli, representing an additional tool for healthcare applications. Finally, there is an emerging interest to create biological constructs having active properties, such as sensing, motion or shape modification. In this review, we highlight how introducing nano-biomaterials in bioprinting approaches leads to promising strategies for tissue regeneration.
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Affiliation(s)
- Nicola Di Marzio
- AO Research Institute, Davos, Switzerland.,Department of Health Sciences, Università del Piemonte Orientale (UPO), Novara, Italy
| | | | | | - Lorenzo Moroni
- Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
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32
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Long RG, Ferguson SJ, Benneker LM, Sakai D, Li Z, Pandit A, Grijpma DW, Eglin D, Zeiter S, Schmid T, Eberli U, Nehrbass D, Di Pauli von Treuheim T, Alini M, Iatridis JC, Grad S. Morphological and biomechanical effects of annulus fibrosus injury and repair in an ovine cervical model. JOR Spine 2020; 3:e1074. [PMID: 32211587 PMCID: PMC7084058 DOI: 10.1002/jsp2.1074] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 10/17/2019] [Accepted: 11/12/2019] [Indexed: 12/16/2022] Open
Abstract
Tissue engineering repair of annulus fibrosus (AF) defects has the potential to prevent disability and pain from intervertebral disc (IVD) herniation and its progression to degeneration. Clinical translation of AF repair methods requires assessment in long-term large animal models. An ovine AF injury model was developed using cervical spinal levels and a biopsy-type AF defect to assess composite tissue engineering repair in 1-month and 12-month studies. The repair used a fibrin hydrogel crosslinked with genipin (FibGen) to seal defects, poly(trimethylene carbonate) (PTMC) scaffolds to replace lost AF tissue, and polyurethane membranes to prevent herniation. In the 1-month study, PTMC scaffolds sealed with FibGen herniated with polyurethane membranes. When applied alone, FibGen integrated with the surrounding AF tissue without herniation, showing promise for long-term studies. The 12-month long-term study used only FibGen which showed fibrous healing, biomaterial resorption and no obvious hydrogel-related complications. However, the 2 mm biopsy punch injury condition also exhibited fibrotic healing at 12 months. Both untreated and FibGen treated groups showed equivalency with no detectable differences in histological grades of proteoglycans, cellular morphology, IVD structure and blood vessel formation, biomechanical properties including torque range and axial range of motion, Pfirrmann grade, IVD height, and quantitative scores of vertebral body changes from clinical computed tomography. The biopsy-type injury caused endplate defects with a high prevalence of osteophytes in all groups and no nucleus herniation, indicating that the biopsy-type injury requires further refinement, such as reduction to a slit-type defect that could penetrate the full depth of the AF without damaging the endplate. Results demonstrate translational feasibility of FibGen for AF repair to seal AF defects, although future study with a more refined injury model is required to validate the efficacy of FibGen before translation.
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Affiliation(s)
- Rose G. Long
- Department of GeneticsHarvard Medical SchoolBostonMassachusetts
| | | | - Lorin M. Benneker
- Department for Orthopaedic Surgery, Spine Unit, InselspitalUniversity Hospital of BernBernSwitzerland
| | - Daisuke Sakai
- Department of Orthopaedic SurgeryTokai University School of MedicineKanagawaJapan
| | - Zhen Li
- AO Research Institute DavosDavos PlatzSwitzerland
| | - Abhay Pandit
- CÚRAM, Center for Research in Medical DevicesNational University of IrelandGalwayIreland
| | - Dirk W. Grijpma
- University of Twente, Technical Medical CentreDepartment of Biomaterials Science and TechnologyFaculty of Science and TechnologyEnschedeThe Netherlands
| | - David Eglin
- AO Research Institute DavosDavos PlatzSwitzerland
| | | | - Tanja Schmid
- AO Research Institute DavosDavos PlatzSwitzerland
| | | | | | | | - Mauro Alini
- AO Research Institute DavosDavos PlatzSwitzerland
| | - James C. Iatridis
- Leni & Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mount SinaiNew YorkNew York
| | - Sibylle Grad
- AO Research Institute DavosDavos PlatzSwitzerland
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33
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Frayssinet A, Petta D, Illoul C, Haye B, Markitantova A, Eglin D, Mosser G, D'Este M, Hélary C. Extracellular matrix-mimetic composite hydrogels of cross-linked hyaluronan and fibrillar collagen with tunable properties and ultrastructure. Carbohydr Polym 2020; 236:116042. [PMID: 32172856 DOI: 10.1016/j.carbpol.2020.116042] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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: 11/14/2019] [Revised: 01/08/2020] [Accepted: 02/19/2020] [Indexed: 12/18/2022]
Abstract
A platform of enzymatically-crosslinked Collagen/Tyramine hyaluronan derivative (Col/HA-Tyr) hydrogels with tunable compositions and gelation conditions was developed to evaluate the impact of the preparation conditions on their physical, chemical and biological properties. At low HA-Tyr content, hydrogels exhibited a fibrillar structure, with lower mechanical properties compared to pure Col hydrogels. At high HA-Tyr and Horse Radish Peroxydase (HRP) content, a microfibrillar network was formed beside the banded Col fibrils and a synergistic effect of the hybrid structure on mechanical properties was observed. These hydrogels were highly resistant against enzymatic degradation while keeping a high degree of hydration. Unlike HA-Tyr hydrogels, encapsulation of human dermal fibroblasts within Col/HA-Tyr hydrogels allowed for high cell viability. These results showed that high HA-Tyr and HRP concentrations are required to positively impact the physical properties of hydrogels while preserving collagen fibrils. Those Col/HA-Tyr hydrogels appear promising for novel tissue engineering applications following a biomimetic approach.
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Affiliation(s)
- Antoine Frayssinet
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France
| | - Dalila Petta
- AO Research Institute Davos, Davos Platz, Switzerland
| | - Corinne Illoul
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France
| | - Bernard Haye
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France
| | - Anastasiia Markitantova
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France
| | - David Eglin
- AO Research Institute Davos, Davos Platz, Switzerland
| | - Gervaise Mosser
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France
| | - Matteo D'Este
- AO Research Institute Davos, Davos Platz, Switzerland
| | - Christophe Hélary
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, 4 Place Jussieu, 75005 Paris, France.
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34
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Sieberath A, Della Bella E, Ferreira AM, Gentile P, Eglin D, Dalgarno K. A Comparison of Osteoblast and Osteoclast In Vitro Co-Culture Models and Their Translation for Preclinical Drug Testing Applications. Int J Mol Sci 2020; 21:E912. [PMID: 32019244 PMCID: PMC7037207 DOI: 10.3390/ijms21030912] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 12/02/2019] [Revised: 01/10/2020] [Accepted: 01/21/2020] [Indexed: 12/23/2022] Open
Abstract
As the population of western societies on average ages, the number of people affected by bone remodeling-associated diseases such as osteoporosis continues to increase. The development of new therapeutics is hampered by the high failure rates of drug candidates during clinical testing, which is in part due to the poor predictive character of animal models during preclinical drug testing. Co-culture models of osteoblasts and osteoclasts offer an alternative to animal testing and are considered to have the potential to improve drug development processes in the future. However, a robust, scalable, and reproducible 3D model combining osteoblasts and osteoclasts for preclinical drug testing purposes has not been developed to date. Here we review various types of osteoblast-osteoclast co-culture models and outline the remaining obstacles that must be overcome for their successful translation.
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Affiliation(s)
- Alexander Sieberath
- School of Engineering, Newcastle University, Newcastle-Upon-Tyne NE1 7RU, UK; (A.S.); (A.M.F.); (P.G.)
| | - Elena Della Bella
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland; (E.D.B.); (D.E.)
| | - Ana Marina Ferreira
- School of Engineering, Newcastle University, Newcastle-Upon-Tyne NE1 7RU, UK; (A.S.); (A.M.F.); (P.G.)
| | - Piergiorgio Gentile
- School of Engineering, Newcastle University, Newcastle-Upon-Tyne NE1 7RU, UK; (A.S.); (A.M.F.); (P.G.)
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland; (E.D.B.); (D.E.)
| | - Kenny Dalgarno
- School of Engineering, Newcastle University, Newcastle-Upon-Tyne NE1 7RU, UK; (A.S.); (A.M.F.); (P.G.)
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35
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Du J, Long R, Nakai T, Sakai D, Benneker L, Zhou G, Li B, Eglin D, Iatridis J, Alini M, Grad S, Li Z. Functional cell phenotype induction with TGF-β1 and collagen-polyurethane scaffold for annulus fibrosus rupture repair. Eur Cell Mater 2020; 39:1-17. [PMID: 31899537 PMCID: PMC7027376 DOI: 10.22203/ecm.v039a01] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Appropriate cell sources, bioactive factors and biomaterials for generation of functional and integrated annulus fibrosus (AF) tissue analogues are still an unmet need. In the present study, the AF cell markers, collagen type I, cluster of differentiation 146 (CD146), mohawk (MKX) and smooth muscle protein 22α (SM22α) were found to be suitable indicators of functional AF cell induction. In vitro 2D culture of human AF cells showed that transforming growth factor β1 (TGF-β1) upregulated the expression of the functional AF markers and increased cell contractility, indicating that TGF-β1-pre-treated AF cells were an appropriate cell source for AF tissue regeneration. Furthermore, a tissue engineered construct, composed of polyurethane (PU) scaffold with a TGF-β1-supplemented collagen type I hydrogel and human AF cells, was evaluated with in vitro 3D culture and ex vivo preclinical bioreactor-loaded organ culture models. The collagen type I hydrogel helped maintaining the AF functional phenotype. TGF-β1 supplement within the collagen I hydrogel further promoted cell proliferation and matrix production of AF cells within in vitro 3D culture. In the ex vivo IVD organ culture model with physiologically relevant mechanical loading, TGF-β1 supplement in the transplanted constructs induced the functional AF cell phenotype and enhanced collagen matrix synthesis. In conclusion, TGF-β1-containing collagen-PU constructs can induce the functional cell phenotype of human AF cells in vitro and in situ. This combined cellular, biomaterial and bioactive agent therapy has a great potential for AF tissue regeneration and rupture repair.
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Affiliation(s)
- J. Du
- AO Research Institute Davos, Davos, Switzerland
| | - R.G. Long
- AO Research Institute Davos, Davos, Switzerland,Icahn School of Medicine at Mount Sinai, New York, USA,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - T. Nakai
- Tokai University School of Medicine, Isehara, Japan,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - D. Sakai
- Tokai University School of Medicine, Isehara, Japan,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - L.M. Benneker
- Inselspital, University of Bern, Bern, Switzerland,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - G. Zhou
- Shenzhen Key Laboratory of Anti-Aging and Regenerative Medicine, Department of Medical Cell Biology and Genetics, Health Sciences Centre, Shenzhen University, Shenzhen, China
| | - B. Li
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China
| | - D. Eglin
- AO Research Institute Davos, Davos, Switzerland,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - J.C. Iatridis
- Icahn School of Medicine at Mount Sinai, New York, USA,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - M. Alini
- AO Research Institute Davos, Davos, Switzerland,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - S. Grad
- AO Research Institute Davos, Davos, Switzerland,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland
| | - Z. Li
- AO Research Institute Davos, Davos, Switzerland,Collaborative Research Program Annulus Fibrosus Repair, AO Foundation, Davos, Switzerland,Address for correspondence: Zhen Li, PhD, AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos Platz, Switzerland. Telephone number: +41 814142325
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36
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Vainieri ML, Lolli A, Kops N, D'Atri D, Eglin D, Yayon A, Alini M, Grad S, Sivasubramaniyan K, van Osch GJVM. Evaluation of biomimetic hyaluronic-based hydrogels with enhanced endogenous cell recruitment and cartilage matrix formation. Acta Biomater 2020; 101:293-303. [PMID: 31726249 DOI: 10.1016/j.actbio.2019.11.015] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 01/17/2023]
Abstract
Biomaterials play a pivotal role in cell-free cartilage repair approaches, where cells must migrate through the scaffold, fill the defect, and then proliferate and differentiate facilitating tissue remodeling. Here we used multiple assays to test the influence of chemokines and growth factors on cell migration and cartilage repair in two different hyaluronan (HA)-based hydrogels. We first investigated bone marrow Mesenchymal Stromal Cells (BMSC) migration in vitro, in response to different concentrations of platelet-derived growth factor-BB (PDGF-BB), chemokine ligand 5 (CCL5/RANTES) and stromal cell-derived factor 1 (SDF-1), using a 3D spheroid-based assay. PDGF-BB was selected as most favourable chemotactic agent, and MSC migration was assessed in the context of physical impediment to cell recruitment by testing Fibrin-HA and HA-Tyramine hydrogels of different cross-linking densities. Supplementation of PDGF-BB stimulated progressive migration of MSC through the gels over time. We then investigated in situ cell migration into the hydrogels with and without PDGF-BB, using a cartilage-bone explant model implanted subcutaneously in athymic mice. In vivo studies show that when placed into an osteochondral defect, both hydrogels supported endogenous cell infiltration and provided an amenable microenvironment for cartilage production. These processes were best supported in Fibrin-HA hydrogel in the absence of PDGF-BB. This study used an advanced preclinical testing platform to select an appropriate microenvironment provided by implanted hydrogels, demonstrating that HA-based hydrogels can promote the initial and critical step of endogenous cell recruitment and circumvent some of the clinical challenges in cartilage tissue repair. STATEMENT OF SIGNIFICANCE: The challenge of articular cartilage repair arises from its complex structure and architecture, which confers the unique mechanical behavior of the extracellular matrix. The aim of our research is to identify biomaterials for implants that can support migration of endogenous stem and progenitor cell populations from cartilage and bone tissue, in order to permanently replace damaged cartilage with the original hyaline structure. Here, we present an in vitro 3D spheroid-based migration assay and an osteochondral defect model, which provide the opportunity to assess biomaterials and biomolecules, and to get stronger experimental evidence of the not well-characterized dynamic process of endogenous cells colonization in an osteochondral defect. Furthermore, the delicate step of early cell migration into biomaterials towards functional tissue engineering is reproduced. These tests can be used for pre-clinical testing of newly developed material designs in the field of scaffold engineering.
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Affiliation(s)
- M L Vainieri
- AO Research Institute Davos, Davos Platz, Switzerland; Department of Orthopeadics, Erasmus MC, University Medical Center, CN Rotterdam, the Netherlands.
| | - A Lolli
- Department of Orthopeadics, Erasmus MC, University Medical Center, CN Rotterdam, the Netherlands.
| | - N Kops
- Department of Orthopeadics, Erasmus MC, University Medical Center, CN Rotterdam, the Netherlands.
| | - D D'Atri
- Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel.
| | - D Eglin
- AO Research Institute Davos, Davos Platz, Switzerland.
| | - A Yayon
- ProCore Ltd., Weizmann Science Park, 7 Golda Meir St., Ness Ziona 70400, Israel.
| | - M Alini
- AO Research Institute Davos, Davos Platz, Switzerland.
| | - S Grad
- AO Research Institute Davos, Davos Platz, Switzerland.
| | - K Sivasubramaniyan
- Department of Orthopeadics, Erasmus MC, University Medical Center, CN Rotterdam, the Netherlands.
| | - G J V M van Osch
- Department of Orthopeadics, Erasmus MC, University Medical Center, CN Rotterdam, the Netherlands; Department of Otorhinolaryngology, Erasmus MC, University Medical Center, CN Rotterdam, the Netherlands.
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37
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Klüter T, Hassan R, Rasch A, Naujokat H, Wang F, Behrendt P, Lippross S, Gerdesmeyer L, Eglin D, Seekamp A, Fuchs S. An Ex Vivo Bone Defect Model to Evaluate Bone Substitutes and Associated Bone Regeneration Processes. Tissue Eng Part C Methods 2020; 26:56-65. [DOI: 10.1089/ten.tec.2019.0274] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Tim Klüter
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Rywan Hassan
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Alexander Rasch
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Hendrik Naujokat
- Department of Oral and Maxillofacial Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Fanlu Wang
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Peter Behrendt
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Sebastian Lippross
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Ludger Gerdesmeyer
- Department of Trauma and Orthopedic Surgery, Section for Oncological and Rheumatological Orthopedics, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - David Eglin
- AO Research Institute Davos, Davos, Switzerland
| | - Andreas Seekamp
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Sabine Fuchs
- Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
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38
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Behrendt P, Ladner Y, Stoddart MJ, Lippross S, Alini M, Eglin D, Armiento AR. Articular Joint-Simulating Mechanical Load Activates Endogenous TGF-β in a Highly Cellularized Bioadhesive Hydrogel for Cartilage Repair. Am J Sports Med 2020; 48:210-221. [PMID: 31877102 DOI: 10.1177/0363546519887909] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The treatment of osteochondral defects (OCDs) constitutes a major problem for orthopaedic surgeons. The altered mechanics and the cell types, with associated soluble factors derived from the exposed subchondral bone, are likely responsible for the mechanically and structurally inferior articular cartilage subsequently obtained as a repair tissue. There is therefore an unmet clinical need for bioresponsive biomaterials that allow cell delivery, reduce cell infiltration from the bone marrow, and support chondrogenesis in the presence of joint mechanical loading. PURPOSE To develop a cell-laden injectable biomaterial, with bioadhesive properties, low cell invasion, and good mechanoresilience, in which simulated joint loading could induce tissue maturation through the production and activation of transforming growth factor beta 1 (TGF-β1). STUDY DESIGN Controlled laboratory study. METHODS Human bone marrow-derived mesenchymal stromal/stem cells were encapsulated in tyramine-modified hyaluronic acid (HA-Tyr) hydrogels, with crosslinking initiated by the addition of horseradish peroxidase (HRP) and various concentrations of hydrogen peroxide (H2O2; 0.3-2 mM). Cytocompatibility and biomechanical and adhesive properties were analyzed by live/dead staining, rheology, and push-out test, respectively. For multiaxial loading, cell-laden hydrogels were subjected to 10% compression superimposed onto a 0.5-N preload and shear loading (±25°) at 1 Hz for 1 hour per day and 5 times a week for 4 weeks. TGF-β1 production and activation were measured by enzyme-linked immunosorbent assay (ELISA). RESULTS The viscoelastic properties of the cell-laden HA-Tyr hydrogels, as crosslinked with different ratios of HRP and H2O2, were demonstrated for a range of cell densities and HRP/H2O2 concentrations. In the absence of serum supplementation, cell invasion into HA-Tyr hydrogels was minimal to absent. The bonding strength of HA-Tyr to articular cartilage compared favorably with clinically used fibrin gel. CONCLUSION HA-Tyr hydrogels can be mechanically conditioned to induce activation of endogenous TGF-b1 produced by the embedded cells. HA-Tyr hydrogels function as cell carriers supporting biomechanically induced production and activation of TGF-β1 and as bioadhesive materials with low cell invasion, suggesting that they hold promise as a novel biomaterial for OCD repair strategies. CLINICAL RELEVANCE Leveraging physiological joint mechanics to support chondrogenic graft maturation in an optimized mechanosensitive hydrogel in the absence of exogenous growth factors is of highest interest for OCD repair.
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Affiliation(s)
- Peter Behrendt
- Department of Orthopaedic and Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Yann Ladner
- AO Research Institute Davos, Davos Platz, Switzerland.,Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
| | | | - Sebastian Lippross
- Department of Orthopaedic and Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Mauro Alini
- AO Research Institute Davos, Davos Platz, Switzerland
| | - David Eglin
- AO Research Institute Davos, Davos Platz, Switzerland
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39
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Guillaume O, Geven MA, Varjas V, Varga P, Gehweiler D, Stadelmann VA, Smidt T, Zeiter S, Sprecher C, Bos RRM, Grijpma DW, Alini M, Yuan H, Richards GR, Tang T, Qin L, Yuxiao L, Jiang P, Eglin D. Orbital floor repair using patient specific osteoinductive implant made by stereolithography. Biomaterials 2019; 233:119721. [PMID: 31954958 DOI: 10.1016/j.biomaterials.2019.119721] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 12/20/2019] [Accepted: 12/20/2019] [Indexed: 12/11/2022]
Abstract
The orbital floor (OF) is an anatomical location in the craniomaxillofacial (CMF) region known to be highly variable in shape and size. When fractured, implants commonly consisting of titanium meshes are customized by plying and crude hand-shaping. Nevertheless, more precise customized synthetic grafts are needed to meticulously reconstruct the patients' OF anatomy with better fidelity. As alternative to titanium mesh implants dedicated to OF repair, we propose a flexible patient-specific implant (PSI) made by stereolithography (SLA), offering a high degree of control over its geometry and architecture. The PSI is made of biodegradable poly(trimethylene carbonate) (PTMC) loaded with 40 wt % of hydroxyapatite (called Osteo-PTMC). In this work, we developed a complete work-flow for the additive manufacturing of PSIs to be used to repair the fractured OF, which is clinically relevant for individualized medicine. This work-flow consists of (i) the surgical planning, (ii) the design of virtual PSIs and (iii) their fabrication by SLA, (iv) the monitoring and (v) the biological evaluation in a preclinical large-animal model. We have found that once implanted, titanium meshes resulted in fibrous tissue encapsulation, whereas Osteo-PMTC resulted in rapid neovascularization and bone morphogenesis, both ectopically and in the OF region, and without the need of additional biotherapeutics such as bone morphogenic proteins. Our study supports the hypothesis that the composite osteoinductive Osteo-PTMC brings advantages compared to standard titanium mesh, by stimulating bone neoformation in the OF defects. PSIs made of Osteo-PTMC represent a significant advancement for patients whereby the anatomical characteristics of the OF defect restrict the utilization of traditional hand-shaped titanium mesh.
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Affiliation(s)
- Olivier Guillaume
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Mike A Geven
- MIRA Institute for Biomedical Engineering and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500, AE Enschede, the Netherlands
| | - Viktor Varjas
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Peter Varga
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Dominic Gehweiler
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | | | - Tanja Smidt
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Stephan Zeiter
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Christoph Sprecher
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Ruud R M Bos
- University Medical Center Groningen, Groningen, the Netherlands
| | - Dirk W Grijpma
- MIRA Institute for Biomedical Engineering and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500, AE Enschede, the Netherlands
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Huipin Yuan
- - Xpand Biotechnology BV, Professor Bronkhorstlaan 10-d, 3723, MB Bilthoven, the Netherlands
| | - Geoff R Richards
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland
| | - Tingting Tang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Ling Qin
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory of Li Ka Shing Institute of Health, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Lai Yuxiao
- Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory of Li Ka Shing Institute of Health, Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Peng Jiang
- General Hospital of People's Liberation Army- Beijing 301 Hospital, Beijing, China
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, CH 7270, Davos, Switzerland.
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Pérez-Köhler B, Linardi F, Pascual G, Bellón JM, Eglin D, Guillaume O. Efficacy of antimicrobial agents delivered to hernia meshes using an adaptable thermo-responsive hyaluronic acid-based coating. Hernia 2019; 24:1201-1210. [DOI: 10.1007/s10029-019-02096-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 11/17/2019] [Indexed: 12/31/2022]
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Loepfe M, Duss A, Zafeiropoulou KA, Björgvinsdóttir O, D'Este M, Eglin D, Fortunato G, Klasen J, Ferguson SJ, Wuertz-Kozak K, Krupkova O. Electrospray-Based Microencapsulation of Epigallocatechin 3-Gallate for Local Delivery into the Intervertebral Disc. Pharmaceutics 2019; 11:E435. [PMID: 31480533 PMCID: PMC6781552 DOI: 10.3390/pharmaceutics11090435] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 08/16/2019] [Accepted: 08/20/2019] [Indexed: 01/17/2023] Open
Abstract
Locally delivered anti-inflammatory compounds can restore the homeostasis of the degenerated intervertebral disc (IVD). With beneficial effects on IVD cells, epigallocatechin 3-gallate (EGCG) is a promising therapeutic candidate. However, EGCG is prone to rapid degradation and/or depletion. Therefore, the purpose of this study was to develop a method for controlled EGCG delivery in the degenerated IVD. Primary IVD cells were isolated from human donors undergoing IVD surgeries. EGCG was encapsulated into microparticles by electrospraying of glutaraldehyde-crosslinked gelatin. The resulting particles were characterized in terms of cytocompatibility and anti-inflammatory activity, and combined with a thermoresponsive carrier to produce an injectable EGCG delivery system. Subsequently, electrospraying was scaled up using the industrial NANOSPIDER™ technology. The produced EGCG microparticles reduced the expression of inflammatory (IL-6, IL-8, COX-2) and catabolic (MMP1, MMP3, MMP13) mediators in pro-inflammatory 3D cell cultures. Combining the EGCG microparticles with the carrier showed a trend towards modulating EGCG activity/release. Electrospray upscaling was achieved, leading to particles with homogenous spherical morphologies. In conclusion, electrospray-based encapsulation of EGCG resulted in cytocompatible microparticles that preserved the activity of EGCG and showed the potential to control EGCG release, thus favoring IVD health by downregulating local inflammation. Future studies will focus on further exploring the biological activity of the developed delivery system for potential clinical use.
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Affiliation(s)
- Moira Loepfe
- Institute for Biomechanics, ETH Zurich, Hönggerbergring 64, 8093 Zurich, Switzerland
| | - Anja Duss
- Institute for Biomechanics, ETH Zurich, Hönggerbergring 64, 8093 Zurich, Switzerland
| | | | - Oddny Björgvinsdóttir
- Institute for Biomechanics, ETH Zurich, Hönggerbergring 64, 8093 Zurich, Switzerland
| | - Matteo D'Este
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Giuseppino Fortunato
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstr. 5, 9014 St. Gallen, Switzerland
| | - Juergen Klasen
- Clinic Prodorso, Walchestrasse 15, 8006 Zurich, Switzerland
| | - Stephen J Ferguson
- Institute for Biomechanics, ETH Zurich, Hönggerbergring 64, 8093 Zurich, Switzerland
| | - Karin Wuertz-Kozak
- Institute for Biomechanics, ETH Zurich, Hönggerbergring 64, 8093 Zurich, Switzerland
- Schön Clinic Munich Harlaching, Spine Center, Academic Teaching Hospital and Spine Research Institute of the Paracelsus Medical University Salzburg (AU), Harlachinger Str. 51, 81547 Munich, Germany
- Department of Health Sciences, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany
| | - Olga Krupkova
- Institute for Biomechanics, ETH Zurich, Hönggerbergring 64, 8093 Zurich, Switzerland.
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Rotman SG, Thompson K, Grijpma DW, Richards RG, Moriarty TF, Eglin D, Guillaume O. Development of bone seeker-functionalised microspheres as a targeted local antibiotic delivery system for bone infections. J Orthop Translat 2019; 21:136-145. [PMID: 32309139 PMCID: PMC7152806 DOI: 10.1016/j.jot.2019.07.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/04/2019] [Accepted: 07/23/2019] [Indexed: 02/01/2023] Open
Abstract
Objective Bone infections are challenging to treat because of limited capability of systemic antibiotics to accumulate at the bone site. To enhance therapeutic action, systemic treatments are commonly combined with local antibiotic-loaded materials. Nevertheless, available drug carriers have undesirable properties, including inappropriate antibiotic release profiles and nonbiodegradability. To alleviate such limitations, we aim to develop a drug delivery system (DDS) for local administration that can interact strongly with bone mineral, releasing antibiotics at the infected bone site. Methods Biodegradable polyesters (poly (ε-caprolactone) or poly (D,l-lactic acid)) were selected to fabricate antibiotic-loaded microspheres by oil in water emulsion. Antibiotic release and antimicrobial effects on Staphylococcus aureus were assessed by zone of inhibition measurements. Microsphere bone affinity was increased by functionalising the bisphosphonate drug alendronate to the microsphere surface using carbodiimide chemistry. Effect of bone targeting microspheres on bone homeostasis was tested by looking at the resorption potential of osteoclasts exposed to the developed microspheres. Results In vitro, the antibiotic release profile from the microspheres was shown to be dependent on the polymer used and the microsphere preparation method. Mineral binding assays revealed that microsphere surface modification with alendronate significantly enhanced interaction with bone-like materials. Additionally, alendronate functionalised microspheres did not differentially affect osteoclast mineral resorption in vitro, compared with nonfunctionalised microspheres. Conclusion We report the development and characterisation of a DDS which can release antibiotics in a sustained manner. Surface-grafted alendronate groups enhanced bone affinity of the microsphere construct, resulting in a bone targeting DDS. The Translational Potential of this Article The DDS presented can be loaded with hydrophobic antibiotics, representing a potential, versatile and biodegradable candidate to locally treat bone infection.
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Affiliation(s)
- Stijn G Rotman
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Switzerland.,Department of Biomaterials Science and Technology, Faculty of Science and Technology, Technical Medical Centre, University of Twente, Enschede, the Netherlands
| | - Keith Thompson
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Switzerland
| | - Dirk W Grijpma
- Department of Biomaterials Science and Technology, Faculty of Science and Technology, Technical Medical Centre, University of Twente, Enschede, the Netherlands
| | - Robert G Richards
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Switzerland
| | - Thomas F Moriarty
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Switzerland
| | - David Eglin
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Switzerland
| | - Olivier Guillaume
- Musculoskeletal Regeneration Program, AO Research Institute Davos, Davos, Switzerland
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Yang Y, Yang S, Wang Y, Yu Z, Ao H, Zhang H, Qin L, Guillaume O, Eglin D, Geoff Richards R, Tang T. Corrigendum to "Anti-infective efficacy, cytocompatibility and biocompatibility of a 3D-printed osteoconductive composite scaffold functionalized with quaternized chitosan" [Acta Biomater. 46 (2016) 112-128]. Acta Biomater 2019; 92:362-365. [PMID: 31126877 DOI: 10.1016/j.actbio.2019.05.029] [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: 10/26/2022]
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Xu Y, Peng J, Richards G, Lu S, Eglin D. Optimization of electrospray fabrication of stem cell-embedded alginate-gelatin microspheres and their assembly in 3D-printed poly(ε-caprolactone) scaffold for cartilage tissue engineering. J Orthop Translat 2019; 18:128-141. [PMID: 31508316 PMCID: PMC6718928 DOI: 10.1016/j.jot.2019.05.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/10/2019] [Accepted: 05/26/2019] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE Our study reports the optimization of electrospray human bone marrow stromal cell (hBMSCs)-embedded alginate-gelatin (Alg-Gel, same as following) microspheres for the purpose of their assembly in 3D-printed poly(ε-caprolactone) (PCL) scaffold for the fabrication of a mechanically stable and biological supportive tissue engineering cartilage construct. METHODS The fabrication of the Alg-Gel microspheres using an electrospray technique was optimized in terms of polydispersity, yield of microspheres and circularity and varying fabrication conditions. PCL scaffolds were designed and printed by melt extrusion. Then, four groups were set: Alg-hBMSC microspheres cultured in the 2D well plate (Alg-hBMSCs+2D) group, Alg-Gel-hBMSC microspheres cultured in the 2D well plate (Alg-Gel-hBMSCs+2D) group, Alg-Gel-hBMSC microspheres embedded in PCL scaffold cultured in the 2D well plate (Alg-Gel-hBMSCs+2D) group and Alg-Gel-hBMSCs microspheres cultured in the 3D bioreactor (Alg-Gel-hBMSCs+3D) group. Cell viability, proliferation and chondrogenic differentiation were evaluated, and mechanical test was performed. RESULTS Nonaggregated, low polydispersity and almost spherical microspheres of average diameter of 200-300 μm were produced with alginate 1.5 w: v%, gelatin (Type B) concentration of 0.5 w: v % and CaCl2 coagulating bath concentration of 3.0 w: v %, using 30G needle size and 8 kV and 0.6 bar voltage and air pressure, respectively. Alginate with gelatin hydrogel improved viability and promoted hBMSC proliferation better than alginate microspheres. Interestingly, hBMSCs embedded in microspheres assembled in 3D-printed PCL scaffold and cultured in a 3D bioreactor were more proliferative in comparison to the previous two groups (p < 0.05). Similarly, the GAG content, GAG/DNA ratio as well as Coll 2 and Aggr gene expression were increased in the last two groups. CONCLUSION Optimization of hBMSC-embedded Alg-Gel microspheres produced by electrospray has been performed. The Alg-Gel composition selected allows conservation of hBMSC viability and supports proliferation and matrix deposition. The possibility to seed and assemble microspheres in designed 3D-printed PCL scaffolds for the fabrication of a mechanically stable and biological supportive tissue engineering cartilage construct was demonstrated. TRANSLATIONAL POTENTIAL OF THIS ARTICLE We optimize and demonstrate that electrospray microsphere fabrication is a cytocompatible and facile process to produce the hBMSC-embedded microsize tissue-like particles that can easily be assembled into a stable construct. This finding could have application in the development of mechanically competent stem cell-based tissue engineering of cartilage regeneration.
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Affiliation(s)
- Yichi Xu
- Lab of Orthopaedics of Department of Orthopaedics, Chinese PLA General Hospital, Beijing Key Lab of Regenerative Medicine in Orthopaedics, Key Lab of Musculoskeletal Trauma & War Injuries of PLA, Beijing 100853, China
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Jiang Peng
- Lab of Orthopaedics of Department of Orthopaedics, Chinese PLA General Hospital, Beijing Key Lab of Regenerative Medicine in Orthopaedics, Key Lab of Musculoskeletal Trauma & War Injuries of PLA, Beijing 100853, China
| | - Geoff Richards
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
| | - Shibi Lu
- Lab of Orthopaedics of Department of Orthopaedics, Chinese PLA General Hospital, Beijing Key Lab of Regenerative Medicine in Orthopaedics, Key Lab of Musculoskeletal Trauma & War Injuries of PLA, Beijing 100853, China
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos Platz, Switzerland
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Santschi M, Vernengo A, Eglin D, D'Este M, Wuertz-Kozak K. Decellularized matrix as a building block in bioprinting and electrospinning. Current Opinion in Biomedical Engineering 2019. [DOI: 10.1016/j.cobme.2019.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Guillaume O, Schmid T, Kluge K, Weber FE, Richards RG, Eberli U, Eglin D, Zeiter S. Introduction of the Anspach drill as a novel surgical driller for creating calvarial defects in animal models. J Orthop Res 2019; 37:1183-1191. [PMID: 30835898 DOI: 10.1002/jor.24265] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 02/17/2019] [Indexed: 02/04/2023]
Abstract
Standardized and reproducible animal models are required for the assessment of bone healing mediated by biomaterials, cells, and drugs. Among the available bone-fractured models, calvarial defect is a simple and adequate option when researchers investigate intra-membranous bone formation and the influence of their regenerative solutions. However, the conventional surgical tools required to perform calvaria osteotomies (i.e., trephine bur mounted on a dental handpiece, DS) can affect the subjacent tissues of the skull, which are the dura mater and the brain. We hypothesized that the quality of the calvaria defect and the preservation of underlying tissues can be improved using a novel Anspach high-speed drill with a Codman Neuro Disposable Perforator handheld (ACP). Using a rabbit cadaveric models, we performed calvarial defects with either conventional DS or the ACP system, and showed that both techniques allowed to create standardized defects with circular geometry. We demonstrated that the ACP had clear benefices in terms of DM preservation and absence of exothermic reaction upon drilling. Even though this comparative work was conducted on cadaver, it is of substantial importance as it introduces a novel technique, easily applicable to investigate calvaria bone healing, which brings clear advantages compared to the conventional dental station. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 9999:1-9, 2019.
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Affiliation(s)
- Olivier Guillaume
- AO Research Institute Davos, Clavadelerstrasse 8, CH7270 Davos, Switzerland
| | - Tanja Schmid
- AO Research Institute Davos, Clavadelerstrasse 8, CH7270 Davos, Switzerland
| | - Katharina Kluge
- AO Research Institute Davos, Clavadelerstrasse 8, CH7270 Davos, Switzerland
| | - Franz E Weber
- Oral Biotechnology & Bioengineering, Division of Cranio-Maxillo-Facial and Oral Surgery, Center of Dental Medicine, 8032 Zürich, Switzerland
| | | | - Ursula Eberli
- AO Research Institute Davos, Clavadelerstrasse 8, CH7270 Davos, Switzerland
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, CH7270 Davos, Switzerland
| | - Stephan Zeiter
- AO Research Institute Davos, Clavadelerstrasse 8, CH7270 Davos, Switzerland
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Safari F, Fani N, Eglin D, Alini M, Stoddart MJ, Baghaban Eslaminejad M. Human umbilical cord-derived scaffolds for cartilage tissue engineering. J Biomed Mater Res A 2019; 107:1793-1802. [PMID: 30983084 DOI: 10.1002/jbm.a.36698] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 04/06/2019] [Accepted: 04/11/2019] [Indexed: 01/19/2023]
Abstract
Since articular cartilage is an avascular tissue, it has limited self-regeneration capacity after damage. Current methods for human bone marrow-derived mesenchymal stem cell (hBM-MSC) differentiation into cartilage result in tissues with a lower quality as compared to native articular cartilage. Decellularized biological scaffolds have the potential to provide appropriate signals, in order to support cellular retention, migration, proliferation, and differentiation. Given the high amount of collagen, hyaluronic acid (HA), and glycosaminoglycan (GAG) in umbilical cord, this tissue can be considered as an abundant natural biomaterial for tissue engineering applications. Human umbilical cord-derived scaffolds were prepared, and the chondrogenic induction of hBM-MSCs loaded onto the scaffolds was investigated. Gelatin-based scaffolds as a commercial material was used as a control. The results show that hBM-MSCs in tissue-derived scaffolds have an increased expression of chondrogenic markers compared with gelatin, whereas there are no significant differences between the expression of hypertrophic and osteogenic markers between tissue and gelatin scaffolds. In conclusion, it is confirmed that umbilical cord-derived scaffolds are able to provide a native environment for the cells and can promote cartilage differentiation. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1793-1802, 2019.
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Affiliation(s)
- Fatemeh Safari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Nesa Fani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Martin J Stoddart
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Mohamadreza Baghaban Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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Lai Y, Li Y, Cao H, Long J, Wang X, Li L, Li C, Jia Q, Teng B, Tang T, Peng J, Eglin D, Alini M, Grijpma DW, Richards G, Qin L. Osteogenic magnesium incorporated into PLGA/TCP porous scaffold by 3D printing for repairing challenging bone defect. Biomaterials 2019; 197:207-219. [DOI: 10.1016/j.biomaterials.2019.01.013] [Citation(s) in RCA: 191] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/26/2018] [Accepted: 01/05/2019] [Indexed: 01/08/2023]
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Fahmy-Garcia S, Mumcuoglu D, de Miguel L, Dieleman V, Witte-Bouma J, van der Eerden BCJ, van Driel M, Eglin D, Verhaar JAN, Kluijtmans SGJM, van Osch GJVM, Farrell E. Novel In Situ Gelling Hydrogels Loaded with Recombinant Collagen Peptide Microspheres as a Slow-Release System Induce Ectopic Bone Formation. Adv Healthc Mater 2018; 7:e1801496. [PMID: 30565901 DOI: 10.1002/adhm.201801496] [Citation(s) in RCA: 2] [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: 11/06/2022]
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50
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Fahmy-Garcia S, Mumcuoglu D, de Miguel L, Dieleman V, Witte-Bouma J, van der Eerden BCJ, van Driel M, Eglin D, Verhaar JAN, Kluijtmans SGJM, van Osch GJVM, Farrell E. Novel In Situ Gelling Hydrogels Loaded with Recombinant Collagen Peptide Microspheres as a Slow-Release System Induce Ectopic Bone Formation. Adv Healthc Mater 2018; 7:e1800507. [PMID: 30230271 DOI: 10.1002/adhm.201800507] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Indexed: 01/06/2023]
Abstract
New solutions for large bone defect repair are needed. Here, in situ gelling slow release systems for bone induction are assessed. Collagen-I based Recombinant Peptide (RCP) microspheres (MSs) are produced and used as a carrier for bone morphogenetic protein 2 (BMP-2). The RCP-MSs are dispersed in three hydrogels: high mannuronate (SLM) alginate, high guluronate (SLG) alginate, and thermoresponsive hyaluronan derivative (HApN). HApN+RCP-MS forms a gel structure at 32 ºC or above, while SLM+RCP-MS and SLG+RCP-MS respond to shear stress displaying thixotropic behavior. Alginate formulations show sustained release of BMP-2, while there is minimal release from HApN. These formulations are injected subcutaneously in rats. SLM+RCP-MS and SLG+RCP-MS loaded with BMP-2 induce ectopic bone formation as revealed by X-ray tomography and histology, whereas HApN+RCP-MS do not. Vascularization occurs within all the formulations studied and is significantly higher in SLG+MS and HApN+RCP-MS than in SLM+RCP-MS. Inflammation (based on macrophage subset staining) decreases over time in both alginate groups, but increases in the HApN+RCP-MS condition. It is shown that a balance between inflammatory cell infiltration, BMP-2 release, and vascularization, achieved in the SLG+RCP-MS alginate condition, is optimal for the induction of de novo bone formation.
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Affiliation(s)
- Shorouk Fahmy-Garcia
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
- Department of Internal Medicine; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - Didem Mumcuoglu
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
- Fujifilm Manufacturing Europe B.V.; Oudenstaart 1 5047TK Tilburg The Netherlands
| | - Laura de Miguel
- Fujifilm Manufacturing Europe B.V.; Oudenstaart 1 5047TK Tilburg The Netherlands
| | - Veerle Dieleman
- Department of Oral and Maxillofacial Surgery; Special Dental Care and Orthodontics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - Janneke Witte-Bouma
- Department of Oral and Maxillofacial Surgery; Special Dental Care and Orthodontics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | | | - Marjolein van Driel
- Department of Internal Medicine; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - David Eglin
- AO Research Institute Davos; Clavadelerstrasse 8 7270 Davos Switzerland
| | - Jan A. N. Verhaar
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | | | - Gerjo J. V. M. van Osch
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
- Department of Otorhinolaryngology; Head and Neck Surgery; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - Eric Farrell
- Department of Oral and Maxillofacial Surgery; Special Dental Care and Orthodontics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
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