51
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Roberts S, Harmon TS, Schaal JL, Miao V, Li KJ, Hunt A, Wen Y, Oas TG, Collier JH, Pappu RV, Chilkoti A. Injectable tissue integrating networks from recombinant polypeptides with tunable order. NATURE MATERIALS 2018; 17:1154-1163. [PMID: 30323334 PMCID: PMC6329288 DOI: 10.1038/s41563-018-0182-6] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/29/2018] [Indexed: 05/23/2023]
Abstract
Emergent properties of natural biomaterials result from the collective effects of nanoscale interactions among ordered and disordered domains. Here, using recombinant sequence design, we have created a set of partially ordered polypeptides to study emergent hierarchical structures by precisely encoding nanoscale order-disorder interactions. These materials, which combine the stimuli-responsiveness of disordered elastin-like polypeptides and the structural stability of polyalanine helices, are thermally responsive with tunable thermal hysteresis and the ability to reversibly form porous, viscoelastic networks above threshold temperatures. Through coarse-grain simulations, we show that hysteresis arises from physical crosslinking due to mesoscale phase separation of ordered and disordered domains. On injection of partially ordered polypeptides designed to transition at body temperature, they form stable, porous scaffolds that rapidly integrate into surrounding tissue with minimal inflammation and a high degree of vascularization. Sequence-level modulation of structural order and disorder is an untapped principle for the design of functional protein-based biomaterials.
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Affiliation(s)
- Stefan Roberts
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Tyler S Harmon
- Department of Physics, Washington University in St. Louis, St. Louis, MO, USA
- Department of Biomedical Engineering and Center for Biological Systems Engineering , Washington University in St. Louis, St. Louis, MO, USA
| | - Jeffrey L Schaal
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Vincent Miao
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Kan Jonathan Li
- Department of Biochemistry, Duke University, Durham, NC, USA
| | - Andrew Hunt
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Yi Wen
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Terrence G Oas
- Department of Biochemistry, Duke University, Durham, NC, USA
| | - Joel H Collier
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Rohit V Pappu
- Department of Biomedical Engineering and Center for Biological Systems Engineering , Washington University in St. Louis, St. Louis, MO, USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham, NC, USA.
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Roberts S, Harmon TS, Schaal JL, Miao V, Li KJ, Hunt A, Wen Y, Oas TG, Collier JH, Pappu RV, Chilkoti A. Author Correction: Injectable tissue integrating networks from recombinant polypeptides with tunable order. NATURE MATERIALS 2018; 17:1164. [PMID: 30382194 PMCID: PMC6640849 DOI: 10.1038/s41563-018-0233-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In the version of this Article originally published, one of the authors' names was incorrectly given as Jeffery Schaal; it should have been Jeffrey L. Schaal. This has been corrected in all versions of the Article.
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Affiliation(s)
- Stefan Roberts
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Tyler S Harmon
- Department of Physics, Washington University in St. Louis, St. Louis, MO, USA
- Department of Biomedical Engineering and Center for Biological Systems Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Jeffrey L Schaal
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Vincent Miao
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Kan Jonathan Li
- Department of Biochemistry, Duke University, Durham, NC, USA
| | - Andrew Hunt
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Yi Wen
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Terrence G Oas
- Department of Biochemistry, Duke University, Durham, NC, USA
| | - Joel H Collier
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Rohit V Pappu
- Department of Biomedical Engineering and Center for Biological Systems Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham, NC, USA.
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53
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Alcaraz JP, Cinquin P, Martin DK. Tackling the Concept of Symbiotic Implantable Medical Devices with Nanobiotechnologies. Biotechnol J 2018; 13:e1800102. [PMID: 30367543 DOI: 10.1002/biot.201800102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 09/17/2018] [Indexed: 12/21/2022]
Abstract
This review takes an approach to implanted medical devices that considers whether the intention of the implanted device is to have any communication of energy or materials with the body. The first part describes some specific examples of three different classes of implants, analyzed with regards to the type of signal sent to cells. Through several examples, the authors describe that a one way signaling to the body leads to encapsulation or degradation. In most cases, those phenomena do not lead to major problems. However, encapsulation or degradation are critical for new kinds of medical devices capable of duplex communication, which are defined in this review as symbiotic devices. The concept the authors propose is that implanted medical devices that need to be symbiotic with the body also need to be designed with an intended duplex communication of energy and materials with the body. This extends the definition of a biocompatible system to one that requires stable exchange of materials between the implanted device and the body. Having this novel concept in mind will guide research in a new field between medical implant and regenerative medicine to create actual symbiotic devices.
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Affiliation(s)
- Jean-Pierre Alcaraz
- Univverity Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, F-38000 Grenoble, France.,SyNaBi, Pavillon Taillefer, Domaine de la Merci, La Tronche 38706, Grenoble, France
| | - Philippe Cinquin
- Univverity Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, F-38000 Grenoble, France.,SyNaBi, Pavillon Taillefer, Domaine de la Merci, La Tronche 38706, Grenoble, France
| | - Donald K Martin
- Univverity Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, F-38000 Grenoble, France.,SyNaBi, Pavillon Taillefer, Domaine de la Merci, La Tronche 38706, Grenoble, France
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54
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Weigel T, Schmitz T, Pfister T, Gaetzner S, Jannasch M, Al-Hijailan R, Schürlein S, Suliman S, Mustafa K, Hansmann J. A three-dimensional hybrid pacemaker electrode seamlessly integrates into engineered, functional human cardiac tissue in vitro. Sci Rep 2018; 8:14545. [PMID: 30266922 PMCID: PMC6162283 DOI: 10.1038/s41598-018-32790-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 09/14/2018] [Indexed: 01/04/2023] Open
Abstract
Pacemaker systems are an essential tool for the treatment of cardiovascular diseases. However, the immune system’s natural response to a foreign body results in the encapsulation of a pacemaker electrode and an impaired energy efficiency by increasing the excitation threshold. The integration of the electrode into the tissue is affected by implant properties such as size, mechanical flexibility, shape, and dimensionality. Three-dimensional, tissue-like electrode scaffolds render an alternative to currently used planar metal electrodes. Based on a modified electrospinning process and a high temperature treatment, a conductive, porous fiber scaffold was fabricated. The electrical and immunological properties of this 3D electrode were compared to 2D TiN electrodes. An increased surface of the fiber electrode compared to the planar 2D electrode, showed an enhanced electrical performance. Moreover, the migration of cells into the 3D construct was observed and a lower inflammatory response was induced. After early and late in vivo host response evaluation subcutaneously, the 3D fiber scaffold showed no adverse foreign body response. By embedding the 3D fiber scaffold in human cardiomyocytes, a tissue-electrode hybrid was generated that facilitates a high regenerative capacity and a low risk of fibrosis. This hybrid was implanted onto a spontaneously beating, tissue-engineered human cardiac patch to investigate if a seamless electronic-tissue interface is generated. The fusion of this hybrid electrode with a cardiac patch resulted in a mechanical stable and electrical excitable unit. Thereby, the feasibility of a seamless tissue-electrode interface was proven.
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Affiliation(s)
- Tobias Weigel
- University Hospital Würzburg, Department Tissue Engineering and Regenerative Medicine (TERM), Röntgenring 11, 97070, Würzburg, Germany
| | - Tobias Schmitz
- University Hospital Würzburg, Department Tissue Engineering and Regenerative Medicine (TERM), Röntgenring 11, 97070, Würzburg, Germany
| | - Tobias Pfister
- Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082, Würzburg, Germany
| | - Sabine Gaetzner
- University Hospital Würzburg, Department Tissue Engineering and Regenerative Medicine (TERM), Röntgenring 11, 97070, Würzburg, Germany
| | - Maren Jannasch
- University Hospital Würzburg, Department Tissue Engineering and Regenerative Medicine (TERM), Röntgenring 11, 97070, Würzburg, Germany
| | - Reem Al-Hijailan
- King Faisal Hospital and research center, Cell Biology Department, research center, P:O Box, 3354 Mbc03, Riyadh, 11211, Saudi Arabia
| | - Sebastian Schürlein
- University Hospital Würzburg, Department Tissue Engineering and Regenerative Medicine (TERM), Röntgenring 11, 97070, Würzburg, Germany
| | - Salwa Suliman
- Department of Clinical Dentistry, Center of Clinical Dental Research, University of Bergen, Årstadveien 19, 5009, Bergen, Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry, Center of Clinical Dental Research, University of Bergen, Årstadveien 19, 5009, Bergen, Norway
| | - Jan Hansmann
- University Hospital Würzburg, Department Tissue Engineering and Regenerative Medicine (TERM), Röntgenring 11, 97070, Würzburg, Germany. .,Fraunhofer Institute for Silicate Research, Neunerplatz 2, 97082, Würzburg, Germany.
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55
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Cohrs NH, Schulz-Schönhagen K, Mohn D, Wolint P, Meier Bürgisser G, Stark WJ, Buschmann J. Modification of silicone elastomers with Bioglass 45S5® increases in ovo tissue biointegration. J Biomed Mater Res B Appl Biomater 2018; 107:1180-1188. [PMID: 30189112 DOI: 10.1002/jbm.b.34211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 11/07/2022]
Abstract
Silicone is an important material family used for various medical implants. It is biocompatible, but its bioinertness prevents cell attachment, and thus tissue biointegration of silicone implants. This often results in constrictive fibrosis and implant failure. Bioglass 45S5® (BG) could be a suitable material to alter the properties of silicone, render it bioactive and improve tissue integration. Therefore, BG micro- or nanoparticles were blended into medical-grade silicone and 2D as well as 3D structures of the resulting composites were analyzed in ovo by a chick chorioallantoic membrane (CAM) assay. The biomechanical properties of the composites were measured and the bioactivity of the composites was verified in simulated body fluid. The bioactivity of BG-containing composites was confirmed visually by the formation of hydroxyapatite through scanning electron microscopy as well as by infrared spectroscopy. BG stiffens as prepared non-porous composites by 13% and 36% for micro- and nanocomposites respectively. In particular, after implantation for 7 days, the Young's modulus had increased significantly from 1.20 ± 0.01 to 1.57 ± 0.03 MPa for microcomposites and 1.44 ± 0.03 to 1.69 ± 0.29 MPa to for nanocpmosites. Still, the materials remain highly elastic and are comparably soft. The incorporation of BG into silicone overcame the bioinertness of the pure polymer. Although the overall tissue integration was weak, it was significantly improved for BG-containing porous silicones (+72% for microcomposites) and even further enhanced for composites containing nanoparticles (+94%). These findings make BG a suitable material to improve silicone implant properties. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 1180-1188, 2019.
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Affiliation(s)
- Nicholas H Cohrs
- Institute for Chemical and Bioengineering, ETH Zürich, Zürich, Switzerland
| | | | - Dirk Mohn
- Institute for Chemical and Bioengineering, ETH Zürich, Zürich, Switzerland
- Clinic of Preventive Dentistry, Periodontology and Cariology, University of Zürich, Center of Dental Medicine, Zürich, Switzerland
| | - Petra Wolint
- Division of Plastic and Hand Surgery, University Hospital Zürich, Zürich, Switzerland
| | | | - Wendelin J Stark
- Institute for Chemical and Bioengineering, ETH Zürich, Zürich, Switzerland
| | - Johanna Buschmann
- Division of Plastic and Hand Surgery, University Hospital Zürich, Zürich, Switzerland
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56
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Masaeli R, Zandsalimi K, Tayebi L. Biomaterials Evaluation: Conceptual Refinements and Practical Reforms. Ther Innov Regul Sci 2018; 53:120-127. [PMID: 29756484 DOI: 10.1177/2168479018774320] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Regarding the widespread and ever-increasing applications of biomaterials in different medical fields, their accurate assessment is of great importance. Hence the safety and efficacy of biomaterials is confirmed only through the evaluation process, the way it is done has direct effects on public health. Although every biomaterial undergoes rigorous premarket evaluation, the regulatory agencies receive a considerable number of complications and adverse event reports annually. The main factors that challenge the process of biomaterials evaluation are dissimilar regulations, asynchrony of biomaterials evaluation and biomaterials development, inherent biases of postmarketing data, and cost and timing issues. Several pieces of evidence indicate that current medical device regulations need to be improved so that they can be used more effectively in the evaluation of biomaterials. This article provides suggested conceptual refinements and practical reforms to increase the efficiency and effectiveness of the existing regulations. The main focus of the article is on strategies for evaluating biomaterials in US, and then in EU.
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Affiliation(s)
- Reza Masaeli
- 1 Dental Biomaterials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Kavosh Zandsalimi
- 2 Department of Life Sciences Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Lobat Tayebi
- 3 Marquette University, School of Dentistry, Milwaukee, WI, USA.,4 Department of Engineering Science, University of Oxford, Oxford, United Kingdom
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57
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Biomaterial-assisted cell therapy in osteoarthritis: From mesenchymal stem cells to cell encapsulation. Best Pract Res Clin Rheumatol 2017; 31:730-745. [DOI: 10.1016/j.berh.2018.05.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/14/2018] [Accepted: 04/23/2018] [Indexed: 02/07/2023]
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58
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Yuan X, Cao H, Wang J, Tang K, Li B, Zhao Y, Cheng M, Qin H, Liu X, Zhang X. Immunomodulatory Effects of Calcium and Strontium Co-Doped Titanium Oxides on Osteogenesis. Front Immunol 2017; 8:1196. [PMID: 29033930 PMCID: PMC5626827 DOI: 10.3389/fimmu.2017.01196] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 09/11/2017] [Indexed: 01/07/2023] Open
Abstract
The effects of calcium (Ca) or strontium (Sr) on host osteogenesis and immune responses have been investigated separately. In clinical practice, these two elements may both be present around an orthopedic device, but their potential synergistic effects on osteogenesis and the immune response have not been explored to date. In this work, we investigated the immunomodulatory effects of Ca and Sr co-doped titanium oxides on osteogenesis in vitro using the mouse macrophage cell line RAW 264.7 alone and in co-culture with mouse bone mesenchymal stem cells (BMSCs), and in vivo using a mouse air-pouch model. Coatings containing Ca and Sr at different concentration ratios were fabricated on titanium substrates using micro-arc oxidation and electrochemical treatment. The in vitro and in vivo results demonstrated that the Ca and Sr concentration ratio has a marked influence on macrophage polarization. The coating with a Ca/Sr ratio of 2:1 was superior to those with other Ca and/or Sr concentrations in terms of modulating M2 polarization, which enhanced osteogenic differentiation of mouse BMSCs in co-culture. These findings suggest that the osteoimmunomodulatory effect of a titanium-oxide coating can be enhanced by modulating the concentration ratio of its components.
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Affiliation(s)
- Xiangwei Yuan
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Huiliang Cao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
| | - Jiaxing Wang
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Kaiwei Tang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
| | - Bin Li
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yaochao Zhao
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mengqi Cheng
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Hui Qin
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
| | - Xianlong Zhang
- Department of Orthopedics, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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59
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Martín C, Merino S, González-Domínguez JM, Rauti R, Ballerini L, Prato M, Vázquez E. Graphene Improves the Biocompatibility of Polyacrylamide Hydrogels: 3D Polymeric Scaffolds for Neuronal Growth. Sci Rep 2017; 7:10942. [PMID: 28887551 PMCID: PMC5591295 DOI: 10.1038/s41598-017-11359-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 08/21/2017] [Indexed: 12/31/2022] Open
Abstract
In tissue engineering strategies, the design of scaffolds based on nanostructures is a subject undergoing intense research: nanomaterials may affect the scaffolds properties, including their ability to interact with cells favouring cell growth and improving tissue performance. Hydrogels are synthetic materials widely used to obtain realistic tissue constructs, as they resemble living tissues. Here, different hydrogels with varying content of graphene, are synthesised by in situ radical polymerization of acrylamide in aqueous graphene dispersions. Hydrogels are characterised focusing on the contribution of the nanomaterial to the polymer network. Our results suggest that graphene is not a mere embedded nanomaterial within the hydrogels, rather it represents an intrinsic component of these networks, with a specific role in the emergence of these structures. Moreover, a hybrid hydrogel with a graphene concentration of only 0.2 mg mL-1 is used to support the growth of cultured brain cells and the development of synaptic activity, in view of exploiting these novel materials to engineer the neural interface of brain devices of the future. The main conclusion of this work is that graphene plays an important role in improving the biocompatibility of polyacrylamide hydrogels, allowing neuronal adhesion.
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Affiliation(s)
- Cristina Martín
- Organic Chemistry area, Faculty of Chemical Science and Technology-IRICA, University of Castilla-La Mancha, Avda. Camilo José Cela 10, 13071, Ciudad Real, Spain
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy
| | - Sonia Merino
- Organic Chemistry area, Faculty of Chemical Science and Technology-IRICA, University of Castilla-La Mancha, Avda. Camilo José Cela 10, 13071, Ciudad Real, Spain
| | - Jose M González-Domínguez
- Organic Chemistry area, Faculty of Chemical Science and Technology-IRICA, University of Castilla-La Mancha, Avda. Camilo José Cela 10, 13071, Ciudad Real, Spain
| | - Rossana Rauti
- International School for Advanced Studies (SISSA), via Bonomea 265, 34136, Trieste, Italy
| | - Laura Ballerini
- International School for Advanced Studies (SISSA), via Bonomea 265, 34136, Trieste, Italy.
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy.
- Carbon Nanobiotechnology Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009, Donostia-San Sebastián, Spain.
- Ikerbasque, Basque Foundation for Science, E-48011, Bilbao, Spain.
| | - Ester Vázquez
- Organic Chemistry area, Faculty of Chemical Science and Technology-IRICA, University of Castilla-La Mancha, Avda. Camilo José Cela 10, 13071, Ciudad Real, Spain.
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60
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Biocompatibility of hydrogel-based scaffolds for tissue engineering applications. Biotechnol Adv 2017; 35:530-544. [DOI: 10.1016/j.biotechadv.2017.05.006] [Citation(s) in RCA: 407] [Impact Index Per Article: 58.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 05/08/2017] [Accepted: 05/22/2017] [Indexed: 12/15/2022]
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61
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Zhao S, Su W, Shah V, Hobson D, Yildirimer L, Yeung KWK, Zhao J, Cui W, Zhao X. Biomaterials based strategies for rotator cuff repair. Colloids Surf B Biointerfaces 2017. [PMID: 28633121 DOI: 10.1016/j.colsurfb.2017.06.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Tearing of the rotator cuff commonly occurs as among one of the most frequently experienced tendon disorders. While treatment typically involves surgical repair, failure rates to achieve or sustain healing range from 20 to 90%. The insufficient capacity to recover damaged tendon to heal to the bone, especially at the enthesis, is primarily responsible for the failure rates reported. Various types of biomaterials with special structures have been developed to improve tendon-bone healing and tendon regeneration, and have received considerable attention for replacement, reconstruction, or reinforcement of tendon defects. In this review, we first give a brief introduction of the anatomy of the rotator cuff and then discuss various design strategies to augment rotator cuff repair. Furthermore, we highlight current biomaterials used for repair and their clinical applications as well as the limitations in the literature. We conclude this article with challenges and future directions in designing more advanced biomaterials for augmentation of rotator cuff repair.
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Affiliation(s)
- Song Zhao
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Wei Su
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Vishva Shah
- Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Divia Hobson
- Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Lara Yildirimer
- Barnet General Hospital, Royal Free NHS Trust Hospital, Wellhouse Lane, Barnet EN5 3DJ, London, UK
| | - Kelvin W K Yeung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Jinzhong Zhao
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China.
| | - Wenguo Cui
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 708 Renmin Rd., Suzhou, Jiangsu 215006, China.
| | - Xin Zhao
- Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
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62
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Weigel T, Pfister T, Schmitz T, Jannasch M, Schürlein S, Hijailan RA, Walles H, Hansmann J. Flexible tissue-like electrode as a seamless tissue-electronic interface. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/bnm-2017-0002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractCurrent implantable electrodes facilitate only a low cellular infiltration impairing the long-term integration into the host’s tissue. To accomplish a seamless electronic-tissue interface, conductive three-dimensional (3D) scaffolds were generated by carbonization of electro-spun fiber meshes. When introducing NaCl particles as porogens, tailored tissue-like electrodes were generated. Characterization of the porous 3D fiber electrodes demonstrated improved material and electrical characteristics compared to standard carbon fiber meshes or flat gold surfaces. The feasibility of the porous 3D electrodes was assessed by cell culture experiments, confirming the migration of cells into the electrode and the formation of contracting cardiomyocyte clusters. Finally, a complex cardiac co-culture system proved the integration of the tissue into the 3D electrode in long-term culture of 7 weeks. These results strengthen the development of tissue-like 3D scaffolds as alternative to two-dimensional (2D) electrodes.
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63
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Jiang J, Li Z, Wang H, Wang Y, Carlson MA, Teusink MJ, MacEwan MR, Gu L, Xie J. Expanded 3D Nanofiber Scaffolds: Cell Penetration, Neovascularization, and Host Response. Adv Healthc Mater 2016; 5:2993-3003. [PMID: 27709840 PMCID: PMC5143187 DOI: 10.1002/adhm.201600808] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/06/2016] [Indexed: 11/12/2022]
Abstract
Herein, a robust method to fabricate expanded nanofiber scaffolds with controlled size and thickness using a customized mold during the modified gas-foaming process is reported. The expansion of nanofiber membranes is also simulated using a computational fluid model. Expanded nanofiber scaffolds implanted subcutaneously in rats show cellular infiltration, whereas non-expanded scaffolds only have surface cellular attachment. Compared to unexpanded nanofiber scaffolds, more CD68+ and CD163+ cells are observed within expanded scaffolds at all tested time points post-implantation. More CCR7+ cells appear within expanded scaffolds at week 8 post-implantation. In addition, new blood vessels are present within the expanded scaffolds at week 2. The formed multinucleated giant cells within expanded scaffolds are heterogeneous expressing CD68, CCR7, or CD163 markers. Together, the present study demonstrates that the expanded nanofiber scaffolds promote cellular infiltration/tissue integration, a regenerative response, and neovascularization after subcutaneous implantation in rats. The use of expanded electrospun nanofiber scaffolds offers a promising method for in situ tissue repair/regeneration and generation of 3D tissue models/constructs.
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Affiliation(s)
- Jiang Jiang
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Zhuoran Li
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Hongjun Wang
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Yue Wang
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Mark A. Carlson
- Departments of Surgery and Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, 68198
- Department of Surgery, VA Nebraska–Western Iowa Health Care System, Omaha, Nebraska, 68105
| | - Matthew J. Teusink
- Department of Orthopedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Matthew R. MacEwan
- Department of Neurosurgery, Washington University School of Medicine, Saint Louis, Missouri, 63110, United States
| | - Linxia Gu
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
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Berger D. In Reply. DEUTSCHES ARZTEBLATT INTERNATIONAL 2016; 113:544. [PMID: 27581514 PMCID: PMC5012171 DOI: 10.3238/arztebl.2016.0544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Dieter Berger
- *Klinik für Viszeral-, Thorax- und Kinderchirurgie, Klinikum Mittelbaden/Balg, Baden-Baden,
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