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Matsumiya K, Inagaki NF, Ito T. Fabrication of Drug-Loaded Torus-Shaped Alginate Microparticles and Kinetic Analysis of Their Drug Release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1247-1256. [PMID: 37988317 DOI: 10.1021/acs.langmuir.3c02626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
We fabricated drug-loaded, microsized, and torus-shaped alginate microparticles (TSMs) by vortex-ring freezing (VRF), utilizing vortex ring formation and ionic cross-linking. The equivalent outer diameter of the TSMs was ca. 200 μm. Several model drugs, such as doxorubicin, heparin, lysozyme, and several dextran derivatives, have been successfully loaded into TSMs. Because the TSMs were fragile due to the limitation of the process conditions of the VRF, drug-loaded TSMs were subsequently cross-linked via "post-cross-linking" with CaCl2, SrCl2, or BaCl2 to increase the cross-linking density of the alginate matrix, thereby enhancing the stability of dextran (Dex)-loaded TSMs (Dex-TSMs) and enabling the sustained release of natural Dex of 10, 70, or 150 kDa and cationic or anionic Dex at a physiological pH. The release kinetics of Dexs showed molecular weight and charge dependence; a relatively dense network of the alginate matrix of post-cross-linked TSMs resulted in the sustained release of Dexs with high molecular weights, heparin, and lysozyme for up to 7 days in the release test. Furthermore, the solute diffusivities of the dextran derivatives in the bulk alginate matrix were measured by using fluorescence correlation spectroscopy, which supported the release kinetics of TSMs. Drug-loaded TSMs have potential as drug carriers for biopharmaceuticals, such as proteins.
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Affiliation(s)
- Kazuki Matsumiya
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Natsuko F Inagaki
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Taichi Ito
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Radiology and Biomedical Engineering, School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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2
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Maciel BR, Grimm A, Oelschlaeger C, Schepers U, Willenbacher N. Targeted micro-heterogeneity in bioinks allows for 3D printing of complex constructs with improved resolution and cell viability. Biofabrication 2023; 15:045013. [PMID: 37552974 DOI: 10.1088/1758-5090/acee22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 08/08/2023] [Indexed: 08/10/2023]
Abstract
Three-dimensional bioprinting is an evolving versatile technique for biomedical applications. Ideal bioinks have complex micro-environment that mimic human tissue, allow for good printing quality and provide high cell viability after printing. Here we present two strategies for enhancing gelatin-based bioinks heterogeneity on a 1-100µm length scale resulting in superior printing quality and high cell viability. A thorough spatial and micro-mechanical characterization of swollen hydrogel heterogeneity was done using multiple particle tracking microrheology. When poly(vinyl alcohol) is added to homogeneous gelatin gels, viscous inclusions are formed due to micro-phase separation. This phenomenon leads to pronounced slip and superior printing quality of complex 3D constructs as well as high human hepatocellular carcinoma (HepG2) and normal human dermal fibroblast (NHDF) cell viability due to reduced shear damage during extrusion. Similar printability and cell viability results are obtained with gelatin/nanoclay composites. The formation of polymer/nanoclay clusters reduces the critical stress of gel fracture, which facilitates extrusion, thus enhancing printing quality and cell viability. Targeted introduction of micro-heterogeneities in bioinks through micro-phase separation is an effective technique for high resolution 3D printing of complex constructs with high cell viability. The size of the heterogeneities, however, has to be substantially smaller than the desired feature size in order to achieve good printing quality.
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Affiliation(s)
- Bruna R Maciel
- Institute of Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Alisa Grimm
- Institute of Functional Interfaces, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Claude Oelschlaeger
- Institute of Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Ute Schepers
- Institute of Functional Interfaces, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Norbert Willenbacher
- Institute of Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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3
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Vuorenpää H, Björninen M, Välimäki H, Ahola A, Kroon M, Honkamäki L, Koivumäki JT, Pekkanen-Mattila M. Building blocks of microphysiological system to model physiology and pathophysiology of human heart. Front Physiol 2023; 14:1213959. [PMID: 37485060 PMCID: PMC10358860 DOI: 10.3389/fphys.2023.1213959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/26/2023] [Indexed: 07/25/2023] Open
Abstract
Microphysiological systems (MPS) are drawing increasing interest from academia and from biomedical industry due to their improved capability to capture human physiology. MPS offer an advanced in vitro platform that can be used to study human organ and tissue level functions in health and in diseased states more accurately than traditional single cell cultures or even animal models. Key features in MPS include microenvironmental control and monitoring as well as high biological complexity of the target tissue. To reach these qualities, cross-disciplinary collaboration from multiple fields of science is required to build MPS. Here, we review different areas of expertise and describe essential building blocks of heart MPS including relevant cardiac cell types, supporting matrix, mechanical stimulation, functional measurements, and computational modelling. The review presents current methods in cardiac MPS and provides insights for future MPS development with improved recapitulation of human physiology.
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Affiliation(s)
- Hanna Vuorenpää
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Adult Stem Cell Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Research, Development and Innovation Centre, Tampere University Hospital, Tampere, Finland
| | - Miina Björninen
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Adult Stem Cell Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Research, Development and Innovation Centre, Tampere University Hospital, Tampere, Finland
| | - Hannu Välimäki
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Micro- and Nanosystems Research Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Antti Ahola
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Computational Biophysics and Imaging Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Mart Kroon
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Biomaterials and Tissue Engineering Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Laura Honkamäki
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Neuro Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Jussi T. Koivumäki
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Computational Biophysics and Imaging Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Mari Pekkanen-Mattila
- Centre of Excellence in Body-on-Chip Research (CoEBoC), BioMediTech, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Heart Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
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Gering C, Párraga J, Vuorenpää H, Botero L, Miettinen S, Kellomäki M. Bioactivated gellan gum hydrogels affect cellular rearrangement and cell response in vascular co-culture and subcutaneous implant models. BIOMATERIALS ADVANCES 2022; 143:213185. [PMID: 36371972 DOI: 10.1016/j.bioadv.2022.213185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 10/28/2022] [Accepted: 11/01/2022] [Indexed: 06/16/2023]
Abstract
Hydrogels are suitable soft tissue mimics and capable of creating pre-vascularized tissues, that are useful for in vitro tissue engineering and in vivo regenerative medicine. The polysaccharide gellan gum (GG) offers an intriguing matrix material but requires bioactivation in order to support cell attachment and transfer of biomechanical cues. Here, four versatile modifications were investigated: Purified NaGG; avidin-modified NaGG combined with biotinylated fibronectin (NaGG-avd); oxidized GG (GGox) covalently modified with carbohydrazide-modified gelatin (gelaCDH) or adipic hydrazide-modified gelatin (gelaADH). All materials were subjected to rheological analysis to assess their viscoelastic properties, using a time sweep for gelation analysis, and subsequent amplitude sweep of the formed hydrogels. The sweeps show that NaGG and NaGG-avd are rather brittle, while gelatin-based hydrogels are more elastic. The degradation of preformed hydrogels in cell culture medium was analyzed with an amplitude sweep and show that gelatin-containing hydrogels degrade more dramatically. A co-culture of GFP-tagged HUVEC and hASC was performed to induce vascular network formation in 3D for up to 14 days. Immunofluorescence staining of the αSMA+ network showed increased cell response to gelatin-GG networks, while the NaGG-based hydrogels did not allow for the elongation of cells. Preformed, 3D hydrogels disks were implanted to subcutaneous rat skin pockets to evaluate biological in vivo response. As visible from the hematoxylin and eosin-stained tissue slices, all materials are biocompatible, however gelatin-GG hydrogels produced a stronger host response. This work indicates, that besides the biochemical cues added to the GG hydrogels, also their viscoelasticity greatly influences the biological response.
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Affiliation(s)
- Christine Gering
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
| | - Jenny Párraga
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Hanna Vuorenpää
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland; Research, Development and Innovation Centre, Tampere University Hospital, Tampere, Finland
| | - Lucía Botero
- Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Susanna Miettinen
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland; Research, Development and Innovation Centre, Tampere University Hospital, Tampere, Finland
| | - Minna Kellomäki
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
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Li Z, Li S, Yang J, Ha Y, Zhang Q, Zhou X, He C. 3D bioprinted gelatin/gellan gum-based scaffold with double-crosslinking network for vascularized bone regeneration. Carbohydr Polym 2022; 290:119469. [DOI: 10.1016/j.carbpol.2022.119469] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/26/2022] [Accepted: 04/05/2022] [Indexed: 12/19/2022]
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6
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Vieira S, da Silva Morais A, Garet E, Silva-Correia J, Reis RL, González-Fernández Á, Oliveira JM. Methacrylated Gellan Gum/Poly-l-lysine Polyelectrolyte Complex Beads for Cell-Based Therapies. ACS Biomater Sci Eng 2021; 7:4898-4913. [PMID: 34533303 DOI: 10.1021/acsbiomaterials.1c00486] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cell encapsulation strategies using hydrogel beads have been considered as an alternative to immunosuppression in cell-based therapies. They rely on layer-by-layer (LbL) deposition of polymers to tune beads' permeability, creating a physical barrier to the host immune system. However, the LbL approach can also create diffusion barriers, hampering the flow of essential nutrients and therapeutic cell products. In this work, the polyelectrolyte complex (PEC) methodology was used to circumvent the drawbacks of the LbL strategy by inducing hydrogel bead formation through the interaction of anionic methacrylated gellan gum (GG-MA) with cationic poly-l-lysine (PLL). The interfacial complexation between both polymers resulted in beads with a cell-friendly GG-MA hydrogel core surrounded by a PEC semipermeable membrane. The beads showed great in vitro stability over time, a semi-permeable behavior, and supported human adipose-derived stem cell encapsulation. Additionally, and regarding immune recognition, the in vitro and in vivo studies pointed out that the hydrogel beads behave as an immunocompatible system. Overall, the engineered beads showed great potential for hydrogel-mediated cell therapies, when immunoprotection is required, as when treating different metabolic disorders.
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Affiliation(s)
- Sílvia Vieira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - Alain da Silva Morais
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - Elina Garet
- Immunology, Biomedical Research Center (CINBIO), Centro Singular de Investigación de Galicia. de Investigación Sanitaria Galicia Sur (IIS-GS), Universidad de Vigo, Campus Universitario de Vigo, Vigo 36310, Spain
| | - Joana Silva-Correia
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - África González-Fernández
- Immunology, Biomedical Research Center (CINBIO), Centro Singular de Investigación de Galicia. de Investigación Sanitaria Galicia Sur (IIS-GS), Universidad de Vigo, Campus Universitario de Vigo, Vigo 36310, Spain
| | - J Miguel Oliveira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
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7
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8
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Sällström N, Capel A, Lewis MP, Engstrøm DS, Martin S. 3D-printable zwitterionic nano-composite hydrogel system for biomedical applications. J Tissue Eng 2020; 11:2041731420967294. [PMID: 33194170 PMCID: PMC7604982 DOI: 10.1177/2041731420967294] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 09/29/2020] [Indexed: 11/29/2022] Open
Abstract
Herein, the cytotoxicity of a novel zwitterionic sulfobetaine hydrogel system with a nano-clay crosslinker has been investigated. We demonstrate that careful selection of the composition of the system (monomer to Laponite content) allows the material to be formed into controlled shapes using an extrusion based additive manufacturing technique with the ability to tune the mechanical properties of the product. Moreover, the printed structures can support their own weight without requiring curing during printing which enables the use of a printing-then-curing approach. Cell culture experiments were conducted to evaluate the neural cytotoxicity of the developed hydrogel system. Cytotoxicity evaluations were conducted on three different conditions; a control condition, an indirect condition (where the culture medium used had been in contact with the hydrogel to investigate leaching) and a direct condition (cells growing directly on the hydrogel). The result showed no significant difference in cell viability between the different conditions and cells were also found to be growing on the hydrogel surface with extended neurites present.
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Affiliation(s)
- Nathalie Sällström
- Wolfson School of Mechanical Electrical & Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, UK
| | - Andrew Capel
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, Leicestershire, UK
| | - Mark P Lewis
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, Leicestershire, UK
| | - Daniel S Engstrøm
- Wolfson School of Mechanical Electrical & Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, UK
| | - Simon Martin
- Department of Materials, Loughborough University, Loughborough, Leicestershire, UK
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Koskela O, Montonen T, Belay B, Figueiras E, Pursiainen S, Hyttinen J. Gaussian Light Model in Brightfield Optical Projection Tomography. Sci Rep 2019; 9:13934. [PMID: 31558755 PMCID: PMC6763473 DOI: 10.1038/s41598-019-50469-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 09/12/2019] [Indexed: 01/27/2023] Open
Abstract
This study focuses on improving the reconstruction process of the brightfield optical projection tomography (OPT). OPT is often described as the optical equivalent of X-ray computed tomography, but based on visible light. The detection optics used to collect light in OPT focus on a certain distance and induce blurring in those features out of focus. However, the conventionally used inverse Radon transform assumes an absolute focus throughout the propagation axis. In this study, we model the focusing properties of the detection by coupling Gaussian beam model (GBM) with the Radon transform. The GBM enables the construction of a projection operator that includes modeling of the blurring caused by the light beam. We also introduce the concept of a stretched GBM (SGBM) in which the Gaussian beam is scaled in order to avoid the modeling errors related to the determination of the focal plane. Furthermore, a thresholding approach is used to compress memory usage. We tested the GBM and SGBM approaches using simulated and experimental data in mono- and multifocal modes. When compared with the traditionally used filtered backprojection algorithm, the iteratively computed reconstructions, including the Gaussian models GBM and SGBM, provided smoother images with higher contrast.
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Affiliation(s)
- Olli Koskela
- Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33014, Finland.
- HAMK Smart Research Unit, Häme University of Applied Sciences, Hämeenlinna, 13100, Finland.
| | - Toni Montonen
- Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33014, Finland
| | - Birhanu Belay
- Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33014, Finland
| | - Edite Figueiras
- Champalimaud Research, Champalimaud Foundation, Lisbon, 1400-038, Portugal
| | - Sampsa Pursiainen
- Faculty of Information Technology and Communication Sciences, Tampere University, Tampere, 33014, Finland
| | - Jari Hyttinen
- Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33014, Finland
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10
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Vieira S, da Silva Morais A, Garet E, Silva-Correia J, Reis RL, González-Fernández Á, Miguel Oliveira J. Self-mineralizing Ca-enriched methacrylated gellan gum beads for bone tissue engineering. Acta Biomater 2019; 93:74-85. [PMID: 30708066 DOI: 10.1016/j.actbio.2019.01.053] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/07/2019] [Accepted: 01/27/2019] [Indexed: 02/07/2023]
Abstract
In this study, methacrylated gellan-gum (GG-MA) heteropolysaccharide is proposed as a hydrogel for drug delivery and bone tissue engineering applications. Calcium-enriched beads obtained from the crosslinking of 1% (w/v) GG-MA solutions with 0.1 MCaCl2 were investigated, considering their intrinsic capacity to promote self-mineralization by ion binding and deposition. Indeed, when immersed in a physiological environment, the Ca-enriched beads promoted the development of a bone-like apatite layer, as confirmed by EDS and XRD chemical analysis. Additionally, the mild production process is compatible with drugs incorporation and release. After encapsulation, Dextran with different molecular weights as well as Dexamethasone 21-phosphate were efficiently released to the surrounding environment. The engineered system was also evaluated considering its biocompatibility, by means of qualitative determination of total complement activation, macrophage proliferation, cytokine release and in vitro cell culture. These experiments showed that the developed hydrogels may not stimulate a disproportionate pro-inflammatory reaction once transplanted. At last, when implanted subcutaneously in CD1 male mice up to 8 weeks, the beads were completely calcified, and no inflammatory reaction was observed. Summing up, these results show that calcium-enriched GG-MA hydrogel beads hold great potential as news tools for bone tissue regeneration and local drug delivery applications. STATEMENT OF SIGNIFICANCE: This work describes a low-cost and straightforward strategy to prepare bioactive methacrylated gellan gum (GG-MA) hydrogels, which can be used as drug delivery systems. GG-MA is a highly anionic polymer, that can be crosslinked with divalent ions, as calcium. Taking advantage of this feature, it was possible to prepare Ca-enriched GG-MA hydrogel beads. These beads display a bioactive behavior, since they promote apatite deposition when placed in physiological conditions. Studies on the immune response suggest that the developed beads do not trigger severe immune responses. Importantly, the mild processing method render these beads compliant with drug delivery strategies, paving the way for the application of dual-functional materials on bone tissue engineering.
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Affiliation(s)
- Sílvia Vieira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Alain da Silva Morais
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Elina Garet
- Immunology, Centro de Investigaciones Biomédicas (CINBIO) (Centro Singular de Investigación de Galicia 2016-2019) & Galicia-Sur Health Research Institute (IIS-GS), University Campus, Vigo, Pontevedra 36310, Spain
| | - Joana Silva-Correia
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, AvePark, 4805-017 Barco, Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, AvePark, 4805-017 Barco, Guimarães, Portugal
| | - África González-Fernández
- Immunology, Centro de Investigaciones Biomédicas (CINBIO) (Centro Singular de Investigación de Galicia 2016-2019) & Galicia-Sur Health Research Institute (IIS-GS), University Campus, Vigo, Pontevedra 36310, Spain
| | - J Miguel Oliveira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, AvePark, 4805-017 Barco, Guimarães, Portugal.
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Koljonen V, Koskela O, Montonen T, Rezaei A, Belay B, Figueiras E, Hyttinen J, Pursiainen S. A mathematical model and iterative inversion for fluorescent optical projection tomography. Phys Med Biol 2019; 64:045017. [PMID: 30630144 DOI: 10.1088/1361-6560/aafd63] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Solving the fluorophore distribution in a tomographic setting has been difficult because of the lack of physically meaningful and computationally applicable propagation models. This study concentrates on the direct modelling of fluorescence signals in optical projection tomography (OPT), and on the corresponding inverse problem. The reconstruction problem is solved using emission projections corresponding to a series of rotational imaging positions of the sample. Similarly to the bright field OPT bearing resemblance with the transmission x-ray computed tomography, the fluorescent mode OPT is analogous to x-ray fluorescence tomography (XFCT). As an improved direct model for the fluorescent OPT, we derive a weighted Radon transform based on the XFCT literature. Moreover, we propose a simple and fast iteration scheme for the slice-wise reconstruction of the sample. The developed methods are applied in both numerical experiments and inversion of fluorescent OPT data from a zebrafish embryo. The results demonstrate the importance of propagation modelling and our analysis provides a flexible modelling framework for fluorescent OPT that can easily be modified to adapt to different imaging setups.
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Affiliation(s)
- Ville Koljonen
- Faculty of Information Technology and Communication Sciences, Tampere University, Tampere, Finland. BioMediTech Institute and Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland. Author to whom any correspondence should be addressed
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Vuornos K, Ojansivu M, Koivisto JT, Häkkänen H, Belay B, Montonen T, Huhtala H, Kääriäinen M, Hupa L, Kellomäki M, Hyttinen J, Ihalainen JA, Miettinen S. Bioactive glass ions induce efficient osteogenic differentiation of human adipose stem cells encapsulated in gellan gum and collagen type I hydrogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:905-918. [PMID: 30889765 DOI: 10.1016/j.msec.2019.02.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 02/05/2019] [Accepted: 02/10/2019] [Indexed: 12/29/2022]
Abstract
BACKGROUND Due to unmet need for bone augmentation, our aim was to promote osteogenic differentiation of human adipose stem cells (hASCs) encapsulated in gellan gum (GG) or collagen type I (COL) hydrogels with bioactive glass (experimental glass 2-06 of composition [wt-%]: Na2O 12.1, K2O 14.0, CaO 19.8, P2O5 2.5, B2O3 1.6, SiO2 50.0) extract based osteogenic medium (BaG OM) for bone construct development. GG hydrogels were crosslinked with spermidine (GG-SPD) or BaG extract (GG-BaG). METHODS Mechanical properties of cell-free GG-SPD, GG-BaG, and COL hydrogels were tested in osteogenic medium (OM) or BaG OM at 0, 14, and 21 d. Hydrogel embedded hASCs were cultured in OM or BaG OM for 3, 14, and 21 d, and analyzed for viability, cell number, osteogenic gene expression, osteocalcin production, and mineralization. Hydroxyapatite-stained GG-SPD samples were imaged with Optical Projection Tomography (OPT) and Selective Plane Illumination Microscopy (SPIM) in OM and BaG OM at 21 d. Furthermore, Raman spectroscopy was used to study the calcium phosphate (CaP) content of hASC-secreted ECM in GG-SPD, GG-BaG, and COL at 21 d in BaG OM. RESULTS The results showed viable rounded cells in GG whereas hASCs were elongated in COL. Importantly, BaG OM induced significantly higher cell number and higher osteogenic gene expression in COL. In both hydrogels, BaG OM induced strong mineralization confirmed as CaP by Raman spectroscopy and significantly improved mechanical properties. GG-BaG hydrogels rescued hASC mineralization in OM. OPT and SPIM showed homogeneous 3D cell distribution with strong mineralization in BaG OM. Also, strong osteocalcin production was visible in COL. CONCLUSIONS Overall, we showed efficacious osteogenesis of hASCs in 3D hydrogels with BaG OM with potential for bone-like grafts.
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Affiliation(s)
- Kaisa Vuornos
- Adult Stem Cell Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 100, FI-33014 Tampere, Finland; Research, Development and Innovation Centre, Tampere University Hospital, P.O. BOX 2000, FI-33521, Tampere, Finland.
| | - Miina Ojansivu
- Adult Stem Cell Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 100, FI-33014 Tampere, Finland; Research, Development and Innovation Centre, Tampere University Hospital, P.O. BOX 2000, FI-33521, Tampere, Finland.
| | - Janne T Koivisto
- Biomaterials and Tissue Engineering Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 527, FI-33101 Tampere, Finland; Heart Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 100, FI-33014 Tampere, Finland.
| | - Heikki Häkkänen
- Nanoscience Center, University of Jyväskylä, P.O. BOX 35, FI-40014 Jyväskylä, Finland.
| | - Birhanu Belay
- Computational Biophysics and Imaging Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 527, FI-33101 Tampere, Finland.
| | - Toni Montonen
- Computational Biophysics and Imaging Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 527, FI-33101 Tampere, Finland.
| | - Heini Huhtala
- Faculty of Social Sciences, Tampere University, P.O. BOX 100, FI-33014 Tampere, Finland.
| | - Minna Kääriäinen
- Department of Plastic and Reconstructive Surgery, Tampere University Hospital, P.O. BOX 2000, FI-33521 Tampere, Finland.
| | - Leena Hupa
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo, Finland.
| | - Minna Kellomäki
- Biomaterials and Tissue Engineering Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 527, FI-33101 Tampere, Finland.
| | - Jari Hyttinen
- Computational Biophysics and Imaging Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 527, FI-33101 Tampere, Finland.
| | - Janne A Ihalainen
- Nanoscience Center, University of Jyväskylä, P.O. BOX 35, FI-40014 Jyväskylä, Finland.
| | - Susanna Miettinen
- Adult Stem Cell Group, BioMediTech, Faculty of Medicine and Health Technology, Tampere University, P.O. BOX 100, FI-33014 Tampere, Finland; Research, Development and Innovation Centre, Tampere University Hospital, P.O. BOX 2000, FI-33521, Tampere, Finland.
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Ribeiro VP, Silva-Correia J, Gonçalves C, Pina S, Radhouani H, Montonen T, Hyttinen J, Roy A, Oliveira AL, Reis RL, Oliveira JM. Rapidly responsive silk fibroin hydrogels as an artificial matrix for the programmed tumor cells death. PLoS One 2018; 13:e0194441. [PMID: 29617395 PMCID: PMC5884513 DOI: 10.1371/journal.pone.0194441] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 03/02/2018] [Indexed: 01/29/2023] Open
Abstract
Timely and spatially-regulated injectable hydrogels, able to suppress growing tumors in response to conformational transitions of proteins, are of great interest in cancer research and treatment. Herein, we report rapidly responsive silk fibroin (SF) hydrogels formed by a horseradish peroxidase (HRP) crosslinking reaction at physiological conditions, and demonstrate their use as an artificial biomimetic three-dimensional (3D) matrix. The proposed SF hydrogels presented a viscoelastic nature of injectable hydrogels and spontaneous conformational changes from random coil to β-sheet conformation under physiological conditions. A human neuronal glioblastoma (U251) cell line was used for screening cell encapsulation and in vitro evaluation within the SF hydrogels. The transparent random coil SF hydrogels promoted cell viability and proliferation up to 10 days of culturing, while the crystalline SF hydrogels converted into β-sheet structure induced the formation of TUNEL-positive apoptotic cells. Therefore, this work provides a powerful tool for the investigation of the microenvironment on the programed tumor cells death, by using rapidly responsive SF hydrogels as 3D in vitro tumor models.
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Affiliation(s)
- Viviana P. Ribeiro
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
- * E-mail:
| | - Joana Silva-Correia
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Cristiana Gonçalves
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Sandra Pina
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Hajer Radhouani
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Toni Montonen
- Computational Biophysics and Imaging Group, ELT Department, Tampere University of Technology, Tampere, Finland
- BioMediTech - Institute of Biosciences and Medical Technology, Tampere, Finland
| | - Jari Hyttinen
- Computational Biophysics and Imaging Group, ELT Department, Tampere University of Technology, Tampere, Finland
- BioMediTech - Institute of Biosciences and Medical Technology, Tampere, Finland
| | - Anirban Roy
- Anasys Instruments Corp - Santa Barbara, California, United States of America
| | - Ana L. Oliveira
- CBQF – Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Porto, Portugal
| | - Rui L. Reis
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
| | - Joaquim M. Oliveira
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
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Karvinen J, Koivisto JT, Jönkkäri I, Kellomäki M. The production of injectable hydrazone crosslinked gellan gum-hyaluronan-hydrogels with tunable mechanical and physical properties. J Mech Behav Biomed Mater 2017; 71:383-391. [DOI: 10.1016/j.jmbbm.2017.04.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 03/26/2017] [Accepted: 04/04/2017] [Indexed: 11/16/2022]
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15
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Koivisto JT, Joki T, Parraga JE, Pääkkönen R, Ylä-Outinen L, Salonen L, Jönkkäri I, Peltola M, Ihalainen TO, Narkilahti S, Kellomäki M. Bioamine-crosslinked gellan gum hydrogel for neural tissue engineering. Biomed Mater 2017; 12:025014. [DOI: 10.1088/1748-605x/aa62b0] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Zou J, Pyykkö I, Hyttinen J. Inner ear barriers to nanomedicine-augmented drug delivery and imaging. J Otol 2016; 11:165-177. [PMID: 29937826 PMCID: PMC6002620 DOI: 10.1016/j.joto.2016.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/15/2016] [Accepted: 11/18/2016] [Indexed: 02/08/2023] Open
Abstract
There are several challenges to inner ear drug delivery and imaging due to the existence of tight biological barriers to the target structure and the dense bone surrounding it. Advances in imaging and nanomedicine may provide knowledge for overcoming the existing limitations to both the diagnosis and treatment of inner ear diseases. Novel techniques have improved the efficacy of drug delivery and targeting to the inner ear, as well as the quality and accuracy of imaging this structure. In this review, we will describe the pathways and biological barriers of the inner ear regarding drug delivery, the beneficial applications and limitations of the imaging techniques available for inner ear research, the behavior of engineered nanomaterials in inner ear applications, and future perspectives for nanomedicine-based inner ear imaging.
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Affiliation(s)
- Jing Zou
- Department of Otolaryngology – Head and Neck Surgery, Center for Otolaryngology – Head & Neck Surgery of Chinese PLA, Changhai Hospital, Second Military Medical University, Shanghai, China
- Hearing and Balance Research Unit, Field of Otolaryngology, School of Medicine, University of Tampere, Tampere, Finland
| | - Ilmari Pyykkö
- Hearing and Balance Research Unit, Field of Otolaryngology, School of Medicine, University of Tampere, Tampere, Finland
| | - Jari Hyttinen
- Department of Electronics and Communications Engineering, BioMediTech, Tampere University of Technology, Tampere, Finland
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Bacelar AH, Silva-Correia J, Oliveira JM, Reis RL. Recent progress in gellan gum hydrogels provided by functionalization strategies. J Mater Chem B 2016; 4:6164-6174. [DOI: 10.1039/c6tb01488g] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Gellan gum and its functionalized derivatives present a wide range of applications that open up new possibilities in tissue engineering and regenerative medicine.
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Affiliation(s)
- Ana H. Bacelar
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Barco GMR
| | - Joana Silva-Correia
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Barco GMR
| | - Joaquim M. Oliveira
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Barco GMR
| | - Rui L. Reis
- 3B's Research Group – Biomaterials
- Biodegradables and Biomimetics
- University of Minho
- Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- 4805-017 Barco GMR
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