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Zhang Z, Zhang X, Zheng Z, Xin J, Han S, Qi J, Zhang T, Wang Y, Zhang S. Latest advances: Improving the anti-inflammatory and immunomodulatory properties of PEEK materials. Mater Today Bio 2023; 22:100748. [PMID: 37600350 PMCID: PMC10432209 DOI: 10.1016/j.mtbio.2023.100748] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 08/22/2023] Open
Abstract
Excellent biocompatibility, mechanical properties, chemical stability, and elastic modulus close to bone tissue make polyetheretherketone (PEEK) a promising orthopedic implant material. However, biological inertness has hindered the clinical applications of PEEK. The immune responses and inflammatory reactions after implantation would interfere with the osteogenic process. Eventually, the proliferation of fibrous tissue and the formation of fibrous capsules would result in a loose connection between PEEK and bone, leading to implantation failure. Previous studies focused on improving the osteogenic properties and antibacterial ability of PEEK with various modification techniques. However, few studies have been conducted on the immunomodulatory capacity of PEEK. New clinical applications and advances in processing technology, research, and reports on the immunomodulatory capacity of PEEK have received increasing attention in recent years. Researchers have designed numerous modification techniques, including drug delivery systems, surface chemical modifications, and surface porous treatments, to modulate the post-implantation immune response to address the regulatory factors of the mechanism. These studies provide essential ideas and technical preconditions for the development and research of the next generation of PEEK biological implant materials. This paper summarizes the mechanism by which the immune response after PEEK implantation leads to fibrous capsule formation; it also focuses on modification techniques to improve the anti-inflammatory and immunomodulatory abilities of PEEK. We also discuss the limitations of the existing modification techniques and present the corresponding future perspectives.
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Affiliation(s)
- Zilin Zhang
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Xingmin Zhang
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Zhi Zheng
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Jingguo Xin
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Song Han
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Jinwei Qi
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Tianhui Zhang
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Yongjie Wang
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
| | - Shaokun Zhang
- Department of Spine Surgery, Center of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
- Jilin Engineering Research Center for Spine and Spinal Cord Injury, Changchun, 130021, China
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The Influence of Bloom Index, Endotoxin Levels and Polyethylene Glycol Succinimidyl Glutarate Crosslinking on the Physicochemical and Biological Properties of Gelatin Biomaterials. Biomolecules 2021; 11:biom11071003. [PMID: 34356627 PMCID: PMC8301829 DOI: 10.3390/biom11071003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/30/2021] [Accepted: 07/07/2021] [Indexed: 01/07/2023] Open
Abstract
In the medical device sector, bloom index and residual endotoxins should be controlled, as they are crucial regulators of the device’s physicochemical and biological properties. It is also imperative to identify a suitable crosslinking method to increase mechanical integrity, without jeopardising cellular functions of gelatin-based devices. Herein, gelatin preparations with variable bloom index and endotoxin levels were used to fabricate non-crosslinked and polyethylene glycol succinimidyl glutarate crosslinked gelatin scaffolds, the physicochemical and biological properties of which were subsequently assessed. Gelatin preparations with low bloom index resulted in hydrogels with significantly (p < 0.05) lower compression stress, elastic modulus and resistance to enzymatic degradation, and significantly higher (p < 0.05) free amine content than gelatin preparations with high bloom index. Gelatin preparations with high endotoxin levels resulted in films that induced significantly (p < 0.05) higher macrophage clusters than gelatin preparations with low endotoxin level. Our data suggest that the bloom index modulates the physicochemical properties, and the endotoxin content regulates the biological response of gelatin biomaterials. Although polyethylene glycol succinimidyl glutarate crosslinking significantly (p < 0.05) increased compression stress, elastic modulus and resistance to enzymatic degradation, and significantly (p < 0.05) decreased free amine content, at the concentration used, it did not provide sufficient structural integrity to support cell culture. Therefore, the quest for the optimal gelatin crosslinker continues.
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Liu Y, Segura T. Biomaterials-Mediated Regulation of Macrophage Cell Fate. Front Bioeng Biotechnol 2020; 8:609297. [PMID: 33363135 PMCID: PMC7759630 DOI: 10.3389/fbioe.2020.609297] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 11/23/2020] [Indexed: 01/28/2023] Open
Abstract
Endogenous regeneration aims to rebuild and reinstate tissue function through enlisting natural self-repairing processes. Promoting endogenous regeneration by reducing tissue-damaging inflammatory responses while reinforcing self-resolving inflammatory processes is gaining popularity. In this approach, the immune system is recruited as the principal player to deposit a pro-reparative matrix and secrete pro-regenerative cytokines and growth factors. The natural wound healing cascade involves many immune system players (neutrophils, macrophages, T cells, B cells, etc.) that are likely to play important and indispensable roles in endogenous regeneration. These cells support both the innate and adaptive arms of the immune system and collectively orchestrate host responses to tissue damage. As the early responders during the innate immune response, macrophages have been studied for decades in the context of inflammatory and foreign body responses and were often considered a cell type to be avoided. The view on macrophages has evolved and it is now understood that macrophages should be directly engaged, and their phenotype modulated, to guide the timely transition of the immune response and reparative environment. One way to achieve this is to design immunomodulating biomaterials that can be placed where endogenous regeneration is desired and actively direct macrophage polarization. Upon encountering these biomaterials, macrophages are trained to perform more pro-regenerative roles and generate the appropriate environment for later stages of regeneration since they bridge the innate immune response and the adaptive immune response. This new design paradigm necessitates the understanding of how material design elicits differential macrophage phenotype activation. This review is focused on the macrophage-material interaction and how to engineer biomaterials to steer macrophage phenotypes for better tissue regeneration.
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Affiliation(s)
- Yining Liu
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| | - Tatiana Segura
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
- Department of Neurology, Duke University, Durham, NC, United States
- Department of Dermatology, Duke University, Durham, NC, United States
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Striebel J, Vorobii M, Kumar R, Liu HY, Yang B, Weishaupt C, Rodriguez-Emmenegger C, Fuchs H, Hirtz M, Riehemann K. Controlled Surface Adhesion of Macrophages via Patterned Antifouling Polymer Brushes. ADVANCED NANOBIOMED RESEARCH 2020. [DOI: 10.1002/anbr.202000029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Johannes Striebel
- Physical Institute and Center for Nanotechnology (CeNTech) University of Münster Wilhelm-Klemm-Straße 10 48149 Münster Germany
| | - Mariia Vorobii
- DWI – Leibniz Institute for Interactive Materials and Institute of Technical and Macromolecular Chemistry RWTH Aachen University Forckenbeckstraße 50 52074 Aachen Germany
| | - Ravi Kumar
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein Leopoldshafen Germany
| | - Hui-Yu Liu
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein Leopoldshafen Germany
| | - Bingquan Yang
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein Leopoldshafen Germany
| | - Carsten Weishaupt
- Department of Dermatology University Hospital of Münster Von-Esmarch-Straße 58 48149 Münster Germany
| | - Cesar Rodriguez-Emmenegger
- DWI – Leibniz Institute for Interactive Materials and Institute of Technical and Macromolecular Chemistry RWTH Aachen University Forckenbeckstraße 50 52074 Aachen Germany
| | - Harald Fuchs
- Physical Institute and Center for Nanotechnology (CeNTech) University of Münster Wilhelm-Klemm-Straße 10 48149 Münster Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein Leopoldshafen Germany
| | - Kristina Riehemann
- Physical Institute and Center for Nanotechnology (CeNTech) University of Münster Wilhelm-Klemm-Straße 10 48149 Münster Germany
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Retrospective multicenter cohort analysis of 621 cases of BellaGel silicone breast implants with study of physicochemical properties and surface topography. J Plast Reconstr Aesthet Surg 2020; 74:486-494. [PMID: 33093011 DOI: 10.1016/j.bjps.2020.08.134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 04/22/2020] [Accepted: 08/24/2020] [Indexed: 11/22/2022]
Abstract
This study aimed to assess the effectiveness and safety of BellaGel implants after implantation in Asian women and inform surgeons of another option for use in breast augmentation and reconstruction. This study was conducted in eight hospitals from November 27, 2015 to April 30, 2018. All patients underwent augmentation mammoplasty or implant-based breast reconstruction with BellaGel implants. Complication rates were compared between groups, and the cumulative hazard function was compared using the Kaplan-Meier survival analysis. Implants were grouped by surface type, and the cumulative hazard functions of total complication cases were compared. The biomechanical properties of the BellaGel implant and other company representative implants were tested using a mechanical testing machine, and surface topography was analyzed using a 3D laser scanning confocal microscope. There was a significant difference in the incidence of complications between the reconstruction (17.1%) and augmentation (4.7%) groups, but no significant difference in the complication rates of each group. There was no difference in the reoperation or revision rates between the groups. The log rank test showed a statistically significant difference in cumulative hazard function between the groups. Among the three types of implants (smooth, textured, and microtextured), the microtextured type had the lowest complication rate. The BellaGel microtexture implant had the highest maximal tensile load and displacement value. The BellaGel and Silksurface implants had the highest stored energy, although there was no significant difference. BellaGel implants can serve as a criterion for the selection of safe and effective implants among currently available implants.
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Kang SH, Bengtson BP, Heo CY. Various Properties of Silicone Breast Implant Surfaces and Multimodal Techniques for the Functional Surface Modification. Clin Plast Surg 2020; 48:87-99. [PMID: 33220908 DOI: 10.1016/j.cps.2020.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
"Silicone breast implants are the most widely used medical devices for breast reconstruction and augmentation, and revision, but even after more than 60 years of use they are associated with multiple continued complications. Using advancement in current technologies, researchers are attempting to create an optimal implant surface for patients. Through these efforts, plastic surgeons and material researchers have made great progress in the field of implant research. Multimodal techniques for the functional modification of implant surfaces will contribute to further the development of ideal biomaterials useful in breast implants.
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Affiliation(s)
- Shin Hyuk Kang
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehangno, Jongno-gu, Seoul 03080, Korea
| | - Bradley P Bengtson
- Bengtson Center for Aesthetics and Plastic Surgery, 555 MidTowne Street Northeast, Suite 110, Grand Rapids, MI 49503, USA
| | - Chan Yeong Heo
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, Seongnam 13620, Korea.
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Taccola G, Barber S, Horner PJ, Bazo HAC, Sayenko D. Complications of epidural spinal stimulation: lessons from the past and alternatives for the future. Spinal Cord 2020; 58:1049-1059. [DOI: 10.1038/s41393-020-0505-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/04/2020] [Accepted: 06/09/2020] [Indexed: 02/06/2023]
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Sun Y, Li Y, Wu B, Wang J, Lu X, Qu S, Weng J, Feng B. Biological responses to M13 bacteriophage modified titanium surfaces in vitro. Acta Biomater 2017. [PMID: 28624655 DOI: 10.1016/j.actbio.2017.06.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Phage-based materials have showed great potential in tissue engineering application. However, it is unknown what inflammation response will happen to this kind of materials. This work is to explore the biological responses to M13 bacteriophage (phage) modified titanium surfaces in vitro from the aspects of their interaction with macrophages, osteoblasts and mineralization behavior. Pretreated Ti surface, Ti surfaces with noncrosslinked phage film (APP) and crosslinked phage film (APPG) were compared. Phage films could limit the macrophage adhesion and activity due to inducing adherent-cell apoptosis. The initial inflammatory activity (24h) caused by phage films was relatively high with more production of TNF-α, but in the later stage (7-10days) inflammatory response was reduced with lower TNF-α, IL-6 and higher IL-10. In addition, phage films improved osteoblast adhesion, differentiation, and hydroapatite (HA)-forming via a combination of topographical and biochemcial cues. The noncrosslinked phage film displayed the best immunomodulatory property, osteogenic activity and HA mineralization ability. This work provides better understanding of inflammatory and osteogenetic activity of phage-based materials and contributes to their future application in tissue engineering. STATEMENT OF SIGNIFICANCE In vivo, the bone and immune cells share a common microenvironment, and are being affected by similar cytokines, signaling molecules, transcription factors and membrane receptors. Ideal implants should cause positive biological response, including adequate and appropriate inflammatory reaction, well-balanced bone formation and absorption. Phage-based materials have showed great potential in tissue engineering application. However, at present it is unknown what inflammation response will happen to this kind of materials. A good understanding of the immune response possibly induced by phage-based materials is needed. This work studied the osteoimmunomodulation property of phage films on titanium surface, involving inflammatory response, osteogenic activity and biomineralization ability. It provides more understanding of the phage-based materials and contributes to their future application in tissue engineering.
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Affiliation(s)
- Yuhua Sun
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Yiting Li
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Baohua Wu
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Jianxin Wang
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Xiong Lu
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Shuxin Qu
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Jie Weng
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Bo Feng
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
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O'Malley JT, Burgess BJ, Galler D, Nadol JB. Foreign Body Response to Silicone in Cochlear Implant Electrodes in the Human. Otol Neurotol 2017; 38:970-977. [PMID: 28538471 PMCID: PMC5500409 DOI: 10.1097/mao.0000000000001454] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
HYPOTHESIS Silicone as part of a cochlear implant electrode may be responsible for a foreign body response in the human. BACKGROUND Clinical evidence of a foreign body response to a cochlear implant has been reported. In a previous study, particulate material found within the fibrous sheath and within macrophages surrounding a cochlear implant has been identified as being consistent with platinum. However, to date, there has been no histologic evidence of a role for silicone in this cellular immune response. METHODS A total of 44 temporal bone specimens from 36 patients were reviewed by light microscopy for evidence of presumed platinum and/or silicone foreign bodies in an extracellular or intracellular location. Identification of cell type involved in phagocytosis of foreign body material was accomplished using CD163 immunostaining. The identity and source of the foreign body material was confirmed using energy-dispersive X-ray spectroscopy and scanning electron microscopy. RESULTS Evidence for both platinum and silicone was found in all 44 specimens. In three patients, anti-CD 163 immunostaining demonstrated phagocytized platinum and silicone foreign bodies. In five specimens, energy-dispersive X-ray spectroscopy demonstrated that the birefringent foreign bodies were consistent with silicone. Scanning electron microscopy of two electrodes removed from temporal bones demonstrated small cracks, fragmentation, and small circular defects in the silicone carrier. CONCLUSION Histologic evidence of a foreign body response to the presence of platinum and silicone in a cochlear implant has been demonstrated and may be responsible for some reported delayed failures or extrusion.
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Affiliation(s)
- Jennifer T O'Malley
- *Otopathology Laboratory, Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston †Department of Materials Science and Engineering, Massachusetts Institutes of Technology, Cambridge ‡Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts
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Giusto E, Donegà M, Dumitru AC, Foschi G, Casalini S, Bianchi M, Leonardi T, Russo A, Occhipinti LG, Biscarini F, Garcia R, Pluchino S. Interfacing Polymers and Tissues: Quantitative Local Assessment of the Foreign Body Reaction of Mononuclear Phagocytes to Polymeric Materials. ACTA ACUST UNITED AC 2017; 1:e1700021. [DOI: 10.1002/adbi.201700021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Elena Giusto
- Department of Clinical Neurosciences; Wellcome Trust-Medical Research Council Stem Cell Institute and National Institute for Health Research Biomedical Research Centre; University of Cambridge; Hills Road Cambridge CB2 0HA UK
| | - Matteo Donegà
- Department of Clinical Neurosciences; Wellcome Trust-Medical Research Council Stem Cell Institute and National Institute for Health Research Biomedical Research Centre; University of Cambridge; Hills Road Cambridge CB2 0HA UK
| | - Andra C. Dumitru
- Instituto de Ciencia de Materiales de Madrid; CSIC; Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Giulia Foschi
- Dipartimento di Scienze della Vita; Università di Modena and Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Stefano Casalini
- Dipartimento di Scienze della Vita; Università di Modena and Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Michele Bianchi
- Laboratorio di NanoBiotecnologie-Istituto Ortopedico Rizzoli; Via di Barbiano 1/10 40136 Bologna Italy
| | - Tommaso Leonardi
- Department of Clinical Neurosciences; Wellcome Trust-Medical Research Council Stem Cell Institute and National Institute for Health Research Biomedical Research Centre; University of Cambridge; Hills Road Cambridge CB2 0HA UK
- The EMBL-European Bioinformatics Institute; Wellcome Trust Genome Campus Hinxton Cambridge CB10 1SD UK
| | - Alessandro Russo
- Laboratorio di NanoBiotecnologie-Istituto Ortopedico Rizzoli; Via di Barbiano 1/10 40136 Bologna Italy
| | | | - Fabio Biscarini
- Dipartimento di Scienze della Vita; Università di Modena and Reggio Emilia; Via Campi 103 41125 Modena Italy
| | - Ricardo Garcia
- Instituto de Ciencia de Materiales de Madrid; CSIC; Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Stefano Pluchino
- Department of Clinical Neurosciences; Wellcome Trust-Medical Research Council Stem Cell Institute and National Institute for Health Research Biomedical Research Centre; University of Cambridge; Hills Road Cambridge CB2 0HA UK
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Biodegradable polyester networks including hydrophilic groups favor BMSCs differentiation and can be eroded by macrophage action. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.05.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Suitable Materials for Soft Tissue Reconstruction: In Vitro Studies of Cell – Triblock Copolymer Interactions. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911505058608] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Keratinocytes and fibroblasts have been grown onto a series of triblock copolymers based on 1,5-dioxepan-2-one (DXO) and L-lactide (LLA). The molar ratio of DXO and LLA were varied in the copolymers. This resulted in different degrees of hydrophilicity, which in turn influenced the cell growth. On these surfaces, the morphological appearance of the cells with their cell movements and growth were investigated by means of scanning electron microscopy, time-lapse videomicroscopy and immunohistochemistry. All results clearly showed that the keratinocytes and fibroblasts adhered best to the most hydrophilic copolymers. A majority of the keratinocytes seeded on the most hydrophilic copolymer also presented a polarized morphology indicating a migration tendency. The cell growth onto these materials are interesting since a possible application for these unique materials is as polymeric membranes for guided cutaneous and/or periodontal tissue generation.
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Degenhart AD, Eles J, Dum R, Mischel JL, Smalianchuk I, Endler B, Ashmore RC, Tyler-Kabara EC, Hatsopoulos NG, Wang W, Batista AP, Cui XT. Histological evaluation of a chronically-implanted electrocorticographic electrode grid in a non-human primate. J Neural Eng 2016; 13:046019. [PMID: 27351722 DOI: 10.1088/1741-2560/13/4/046019] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Electrocorticography (ECoG), used as a neural recording modality for brain-machine interfaces (BMIs), potentially allows for field potentials to be recorded from the surface of the cerebral cortex for long durations without suffering the host-tissue reaction to the extent that it is common with intracortical microelectrodes. Though the stability of signals obtained from chronically implanted ECoG electrodes has begun receiving attention, to date little work has characterized the effects of long-term implantation of ECoG electrodes on underlying cortical tissue. APPROACH We implanted and recorded from a high-density ECoG electrode grid subdurally over cortical motor areas of a Rhesus macaque for 666 d. MAIN RESULTS Histological analysis revealed minimal damage to the cortex underneath the implant, though the grid itself was encapsulated in collagenous tissue. We observed macrophages and foreign body giant cells at the tissue-array interface, indicative of a stereotypical foreign body response. Despite this encapsulation, cortical modulation during reaching movements was observed more than 18 months post-implantation. SIGNIFICANCE These results suggest that ECoG may provide a means by which stable chronic cortical recordings can be obtained with comparatively little tissue damage, facilitating the development of clinically viable BMI systems.
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Affiliation(s)
- Alan D Degenhart
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA. Center for the Neural Basis of Cognition, Pittsburgh, PA, USA. Systems Neuroscience Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Vishwakarma A, Bhise NS, Evangelista MB, Rouwkema J, Dokmeci MR, Ghaemmaghami AM, Vrana NE, Khademhosseini A. Engineering Immunomodulatory Biomaterials To Tune the Inflammatory Response. Trends Biotechnol 2016; 34:470-482. [DOI: 10.1016/j.tibtech.2016.03.009] [Citation(s) in RCA: 301] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 03/27/2016] [Accepted: 03/29/2016] [Indexed: 11/24/2022]
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Ion R, Stoian AB, Dumitriu C, Grigorescu S, Mazare A, Cimpean A, Demetrescu I, Schmuki P. Nanochannels formed on TiZr alloy improve biological response. Acta Biomater 2015; 24:370-7. [PMID: 26092351 DOI: 10.1016/j.actbio.2015.06.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/05/2015] [Accepted: 06/10/2015] [Indexed: 01/05/2023]
Abstract
In the present work we report the fabrication of non-thickness-limited 1D nanostructures with nanochannelar structure by anodization of Ti50Zr alloy in hot glycerol-phosphate electrolyte. These nanochannelar structures show high and adjustable aspect ratios and provide as-formed already partial crystallinity for nanochannels. In vitro studies were performed to assess the inflammatory response to nanochannel coated surfaces using RAW 264.7 macrophages. The results show that these nanochannels yield a reduced amount of metabolically-active macrophages, low potential to induce macrophage fusion into FBGC, and low concentration of pro-inflammatory cytokines in the culture medium. Moreover, higher hydrophilicity and lower corrosion rates were registered, compared to compact oxide. Collectively, the results indicate a more favorable cellular response on such nanoscale topography as compared to compact oxide control substrate, and suggest that surface architecture design of nanochannel type on implant materials holds promise for biomedical applications. STATEMENT OF SIGNIFICANCE The use of titanium and its alloys in biomedical devices has been extensively investigated, especially for alloys possessing inherent antibacterial properties such as TiZr alloys. We report for the first time the growth of mesoporous structures, aligned oxide nanochannels, on Ti50Zr alloy. The advantages of these nanochannelar surfaces are a high surface area, a long range ordered nanoscale topology and already partial crystallinity in the as-grown state. In vitro studies performed on RAW 264.7 macrophages demonstrate the potential of nanochannels to lower the inflammatory response, thus reducing the foreign body reaction against Ti50Zr biomedical implants and promoting the successful integration of the implant.
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Zaveri TD, Lewis JS, Dolgova NV, Clare-Salzler MJ, Keselowsky BG. Integrin-directed modulation of macrophage responses to biomaterials. Biomaterials 2014; 35:3504-15. [PMID: 24462356 PMCID: PMC3970928 DOI: 10.1016/j.biomaterials.2014.01.007] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 01/07/2014] [Indexed: 01/08/2023]
Abstract
Macrophages are the primary mediator of chronic inflammatory responses to implanted biomaterials, in cases when the material is either in particulate or bulk form. Chronic inflammation limits the performance and functional life of numerous implanted medical devices, and modulating macrophage interactions with biomaterials to mitigate this response would be beneficial. The integrin family of cell surface receptors mediates cell adhesion through binding to adhesive proteins nonspecifically adsorbed onto biomaterial surfaces. In this work, the roles of integrin Mac-1 (αMβ2) and RGD-binding integrins were investigated using model systems for both particulate and bulk biomaterials. Specifically, the macrophage functions of phagocytosis and inflammatory cytokine secretion in response to a model particulate material, polystyrene microparticles were investigated. Opsonizing proteins modulated microparticle uptake, and integrin Mac-1 and RGD-binding integrins were found to control microparticle uptake in an opsonin-dependent manner. The presence of adsorbed endotoxin did not affect microparticle uptake levels, but was required for the production of inflammatory cytokines in response to microparticles. Furthermore, it was demonstrated that integrin Mac-1 and RGD-binding integrins influence the in vivo foreign body response to a bulk biomaterial, subcutaneously implanted polyethylene terephthalate. A thinner foreign body capsule was formed when integrin Mac-1 was absent (~30% thinner) or when RGD-binding integrins were blocked by controlled release of a blocking peptide (~45% thinner). These findings indicate integrin Mac-1 and RGD-binding integrins are involved and may serve as therapeutic targets to mitigate macrophage inflammatory responses to both particulate and bulk biomaterials.
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Affiliation(s)
- Toral D Zaveri
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Jamal S Lewis
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Natalia V Dolgova
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Michael J Clare-Salzler
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Benjamin G Keselowsky
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA.
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Amini AR, Wallace JS, Nukavarapu SP. Short-term and long-term effects of orthopedic biodegradable implants. J Long Term Eff Med Implants 2012; 21:93-122. [PMID: 22043969 DOI: 10.1615/jlongtermeffmedimplants.v21.i2.10] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Presently, orthopedic and oral/maxillofacial implants represent a combined $2.8 billion market, a figure expected to experience significant and continued growth. Although traditional permanent implants have been proved clinically efficacious, they are also associated with several drawbacks, including secondary revision and removal surgeries. Non-permanent, biodegradable implants offer a promising alternative for patients, as they provide temporary support and degrade at a rate matching tissue formation, and thus, eliminate the need for secondary surgeries. These implants have been in clinical use for nearly 25 years, competing directly with, or maybe even exceeding, the performance of permanent implants. The initial implantation of biodegradable materials, as with permanent materials, mounts an acute host inflammatory response. Over time, the implant degradation profile and possible degradation product toxicity mediate long-term biodegradable implant-induced inflammation. However, unlike permanent implants, this inflammation is likely to cease once the material disappears. Implant-mediated inflammation is a critical determinant for implant success. Thus, for the development of a proactive biodegradable implant that has the ability to promote optimal bone regeneration and minimal detrimental inflammation, a thorough understanding of short- and long-term inflammatory events is required. Here, we discuss an array of biodegradable orthopedic implants, their associated short- and long- term inflammatory effects, and methods to mediate these inflammatory events.
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Affiliation(s)
- Ami R Amini
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT, USA
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Ma M, Liu WF, Hill PS, Bratlie KM, Siegwart DJ, Chin J, Park M, Guerreiro J, Anderson DG. Development of cationic polymer coatings to regulate foreign-body responses. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:H189-94. [PMID: 21567481 PMCID: PMC3957182 DOI: 10.1002/adma.201100513] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/04/2011] [Indexed: 05/19/2023]
Affiliation(s)
- Minglin Ma
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Anesthesiology, Children Hospital Boston, 300 Longwood Ave, Boston, MA 02115, USA
| | - Wendy F. Liu
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Anesthesiology, Children Hospital Boston, 300 Longwood Ave, Boston, MA 02115, USA
| | - Paulina S. Hill
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Kaitlin M. Bratlie
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Anesthesiology, Children Hospital Boston, 300 Longwood Ave, Boston, MA 02115, USA
| | - Daniel J. Siegwart
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Justin Chin
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Miri Park
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Anesthesiology, Children Hospital Boston, 300 Longwood Ave, Boston, MA 02115, USA
| | - Joao Guerreiro
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Daniel G. Anderson
- David H Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Division of Health Science Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Department of Anesthesiology, Children Hospital Boston, 300 Longwood Ave, Boston, MA 02115, USA
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Kim HI, Ishihara K, Lee S, Seo JH, Kim HY, Suh D, Kim MU, Konno T, Takai M, Seo JS. Tissue response to poly(l-lactic acid)-based blend with phospholipid polymer for biodegradable cardiovascular stents. Biomaterials 2011; 32:2241-7. [DOI: 10.1016/j.biomaterials.2010.11.067] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Accepted: 11/27/2010] [Indexed: 02/06/2023]
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Anderson JM, McNally AK. Biocompatibility of implants: lymphocyte/macrophage interactions. Semin Immunopathol 2011; 33:221-33. [DOI: 10.1007/s00281-011-0244-1] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 01/10/2011] [Indexed: 01/05/2023]
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21
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Tsai IY, Kuo CC, Tomczyk N, Stachelek SJ, Composto RJ, Eckmann DM. Human macrophage adhesion on polysaccharide patterned surfaces. SOFT MATTER 2011; 7:3599-3606. [PMID: 21479122 PMCID: PMC3072250 DOI: 10.1039/c0sm01353f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Despite many advances in designing biocompatible materials, inflammation remains a problem in medical devices and implants. We report two methods, microcontact printing and photodegradation by UV exposure, to pattern dextran and hyaluronic acid on glass, as well as demonstrate their utility for use as an anti-inflammatory biomaterial. The dextran/glass patterned surface can be further modified by grafting hyaluronic acid to glass, creating a binary polysaccharide patterned surface. We used two geometries, 90 µm squares and 22 µm stripes, to study the human macrophage (THP-1) adhesion on the patterned surfaces containing dextran, hyaluronic acid and the binary pattern. The results indicate that a majority of the macrophages are non-adherent on hyaluronic acid for three day culture. The ranking of surfaces according to macrophage adhesion is 3-aminopropyl triethoxysilane-modified glass culture dish, dextranized surfaces, glass, and hyaluronic acid-modified surfaces. On the binary pattern of dextran and hyaluronic acid, macrophages preferentially attach and adhere to the dextranized area. Patterned surfaces provide an excellent platform for mimicking the complexity of the glycocalyx and investigating the interface between this surface and cells. This binary polysaccharide pattern also offers a new route to address anti-inflammatory potential of surface coatings on biomaterials in a high through-put fashion.
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Affiliation(s)
- Irene Y. Tsai
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Chin-Chen Kuo
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nancy Tomczyk
- Department of Anesthesiology and Critical Care, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Stanley J. Stachelek
- Department of Pediatrics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Russell J. Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - David M. Eckmann
- Department of Anesthesiology and Critical Care, University of Pennsylvania, Philadelphia, PA 19104, USA
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22
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Chang DT, Saidel GM, Anderson JM. Dynamic Systems Model for Lymphocyte Interactions with Macrophages at Biomaterial Surfaces. Cell Mol Bioeng 2009. [DOI: 10.1007/s12195-009-0088-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Rodriguez A, Meyerson H, Anderson JM. Quantitative in vivo cytokine analysis at synthetic biomaterial implant sites. J Biomed Mater Res A 2009; 89:152-9. [PMID: 18431759 DOI: 10.1002/jbm.a.31939] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
To further elucidate the foreign body reaction, investigation of cytokines at biomaterial implant sites was carried out using a multiplex immunoassay and ELISA. Macrophage activation cytokines (IL-1beta, IL-6, and TNFalpha), cytokines important for macrophage fusion (IL-4 and IL-13), antiinflammatory cytokines (IL-10 and TGFbeta), chemokines (GRO/KC, MCP-1), and the T-cell activation cytokine IL-2 were quantified at biomaterial implant sites. Empty cages (controls) or cages containing synthetic biomedical polymer (Elasthane 80A (PEU), silicone rubber (SR), or polyethylene terephthalate (PET)) were implanted subcutaneously in Sprague-Dawley rats for 4, 7, or 14 days, and cytokines in exudate supernatants and macrophage surface adhesion and fusion were quantified. The presence of a polymer implant did not affect the levels of IL-1beta, TGFbeta, and MCP-1 in comparison to the control group. IL-2 was not virtually detected in any of the samples. Although the levels of IL-4, IL-13, IL-10, and GRO/KC were affected by polymer implantation, but not dependent on a specific polymer, IL-6 and TNFalpha were significantly greater in those animals implanted with PEU and SR, materials that do not promote fusion. The results indicate that differential material-dependent cytokine profiles are produced by surface adherent macrophages and foreign body giant cells in vivo.
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Affiliation(s)
- Analiz Rodriguez
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
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24
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Irwin EF, Saha K, Rosenbluth M, Gamble LJ, Castner DG, Healy KE. Modulus-dependent macrophage adhesion and behavior. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2009; 19:1363-82. [PMID: 18854128 DOI: 10.1163/156856208786052407] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Macrophage attachment and activation to implanted materials is crucial in determining the extent of acute and chronic inflammation, and biomaterials degradation. In an effort to improve implant performance, considerable attention has centered on altering material surface chemistry to modulate macrophage behavior. In this work, the influence of the modulus of a material on the behavior of model macrophages (i.e., human promonocytic THP-1 cells) was investigated. We synthesized interpenetrating polymer network (IPN) coatings with varying moduli to test the hypothesis that lower moduli surfaces attenuate THP-1 cell attachment and activation. The surface chemistry and moduli of the IPN coatings were characterized using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), respectively. THP-1 cells preferentially attached to stiffer coatings of identical surface chemistry, confirming that fewer macrophages attach to lower moduli surfaces. The secretion of human TNF-alpha, IL-10, IL-8 and IL-1beta from THP-1 cells attached to the IPNs was measured to assess the concentration of both pro- and anti-inflammatory cytokines. The global amount of TNF-alpha released did not vary for IPN surfaces of different moduli; however, the amount of the pro-inflammatory cytokine IL-8 released demonstrated a biphasic response, where lower (approx. 1.4 kPa) and very high (approx. 348 kPa) moduli IPN surfaces attenuated IL-8 secretion. The different trends for TNF-alpha and IL-8 secretion highlight the complexity of the wound healing response, suggesting that there may not be a unique surface chemistry and substratum modulus combination that minimizes the pro-inflammatory cytokines produced by activated macrophages.
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Affiliation(s)
- E F Irwin
- Department of Bioengineering, University of California-Berkeley, Berkeley, CA 94720, USA
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25
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Parylene-Encapsulated Copolymeric Membranes as Localized and Sustained Drug Delivery Platforms. Ann Biomed Eng 2009; 37:2003-17. [DOI: 10.1007/s10439-009-9662-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2008] [Accepted: 02/25/2009] [Indexed: 01/17/2023]
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26
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Gunji T, Itagaki S, Kajiwara T, Abe Y, Hatakeyama T, Aoki R. Preparation and Properties of Siloxane/Epoxy Organic-Inorganic Hybrid Thin Films, Self-Standing Films, and Bulk Bodies. Polym J 2009. [DOI: 10.1295/polymj.pj2008290] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Abstract
Synthetic polymer coatings are used extensively in modern medical devices and implants because of their material versatility and processability. These coatings are designed for specific applications by controlling composition and physical and chemical properties, and they can be formed into a variety of complex structures and shapes. However, implantation of these materials into the body elicits a strong inflammatory host response that significantly limits the integration and biological performance of devices. Biomaterial-mediated inflammation is a complex reaction involving protein adsorption, leukocyte recruitment and activation, secretion of inflammatory mediators, and fibrous encapsulation of the implant. Significant research efforts have focused on modifying material properties using various anti-inflammatory polymeric surface coatings to generate more biocompatible implants. This minireview provides a brief background on the events of biomaterial-mediated inflammation and highlights various approaches used for modifying material surfaces to modulate inflammatory responses. These include both passive and active strategies, such as nonfouling surface treatments and delivery of anti-inflammatory agents, respectively. Novel approaches will be needed to extend the in vivo lifetime and performance of devices and reduce the need for multiple implantation surgeries.
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Affiliation(s)
- Amanda W. Bridges
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Andrés J. García
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
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28
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Bridges AW, Singh N, Burns KL, Babensee JE, Andrew Lyon L, García AJ. Reduced acute inflammatory responses to microgel conformal coatings. Biomaterials 2008; 29:4605-15. [PMID: 18804859 DOI: 10.1016/j.biomaterials.2008.08.015] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Accepted: 08/20/2008] [Indexed: 12/27/2022]
Abstract
Implantation of synthetic materials into the body elicits inflammatory host responses that limit medical device integration and biological performance. This inflammatory cascade involves protein adsorption, leukocyte recruitment and activation, cytokine release, and fibrous encapsulation of the implant. We present a coating strategy based on thin films of poly(N-isopropylacrylamide) hydrogel microparticles (i.e. microgels) cross-linked with poly(ethylene glycol) diacrylate. These particles were grafted onto a clinically relevant polymeric material to generate conformal coatings that significantly reduced in vitro fibrinogen adsorption and primary human monocyte/macrophage adhesion and spreading. These microgel coatings also reduced leukocyte adhesion and expression of pro-inflammatory cytokines (TNF-alpha, IL-1beta, MCP-1) in response to materials implanted acutely in the murine intraperitoneal space. These microgel coatings can be applied to biomedical implants as a protective coating to attenuate biofouling, leukocyte adhesion and activation, and adverse host responses for biomedical and biotechnological applications.
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Affiliation(s)
- Amanda W Bridges
- Petit Institute for Bioengineering and Bioscience, 315 Ferst Drive, 2314 IBB, Atlanta, GA 30332-0363, USA
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29
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McNally AK, Jones JA, Macewan SR, Colton E, Anderson JM. Vitronectin is a critical protein adhesion substrate for IL-4-induced foreign body giant cell formation. J Biomed Mater Res A 2008; 86:535-43. [PMID: 17994558 PMCID: PMC4227597 DOI: 10.1002/jbm.a.31658] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An in vitro system of interleukin (IL)-4-induced foreign body giant cell (FBGC) formation was utilized to define the adhesion protein substrate(s) that promotes this aspect of the foreign body reaction on biomedical polymers. Human monocytes were cultured on cell culture polystyrene surfaces that had been pre-adsorbed with a synthetic arginine-glycine-aspartate peptide previously found to support optimal FBGC formation, or with various concentrations of potential physiological protein substrates, i.e. complement C3bi, collagen types I or IV, fibrinogen, plasma fibronectin, fibroblast fibronectin, laminin, thrombospondin, vitronectin, or von Willebrand factor. Cultures were evaluated on days 0 (1.5 h), 3, and 7 by May-Grünwald/Giemsa staining. Initial monocyte adhesion occurred on all adsorbed proteins. However, by day 7 of culture, only vitronectin was striking in its ability to support significant macrophage adhesion, development, and fusion leading to FBGC formation. Vitronectin supported high degrees of FBGC formation at an absorption concentration between 5 and 25 microg/mL. These findings suggest that adsorbed vitronectin is critical in the collective events that support and promote FBGC formation on biomedical polymers, and that the propensity for vitronectin adsorption may underlie the material surface chemistry dependency of FBGC formation.
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Affiliation(s)
- Amy K McNally
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA.
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30
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Patel S, Tsang J, Harbers GM, Healy KE, Li S. Regulation of endothelial cell function by GRGDSP peptide grafted on interpenetrating polymers. J Biomed Mater Res A 2007; 83:423-33. [PMID: 17455217 DOI: 10.1002/jbm.a.31320] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Vascular endothelium plays an important role in preventing thrombogenesis. Bioactive molecules such as fibronectin-derived peptide Gly-Arg-Gly-Asp-Ser-Pro (GRGDSP) can be used to modify the surface of cardiovascular implants such as vascular grafts to promote endothelialization. Here we conjugated GRGDSP peptide to the nonfouling surface of an interpenetrating polymer network (IPN), and investigated the effects of the immobilized GRGDSP molecules on EC functions under static and flow conditions at well-defined GRGDSP surface densities (approximately 0 to 3 pmol/cm2). EC adhesion and spreading increased with GRGDSP surface density, reached a plateau at 1.5 pmol/cm2, and increased further beyond 2.8 pmol/cm2. Cell adhesion and spreading on GRGDSP induced two waves of extracellular signal-regulated kinase (ERK) activation, and 0.2 pmol/cm2 density of GRGDSP was sufficient to activate ERK. EC proliferation rate was not sensitive to GRGDSP surface density, suggesting that cell spreading at low-density of GRGDSP is sufficient to maintain EC proliferation. EC migration on lower-density GRGDSP-IPN surfaces was faster under static condition. With the increase of GRGDSP density, the speed and persistence of EC migration dropped quickly (0.2-0.8 pmol/cm2) and reached a plateau, followed by a slower and gradual decrease (1.5-3.0 pmol/cm2). These data suggest that the changes of EC functions were more sensitive to the increase of GRGDSP density at lower range. Under flow condition with shear stress at 12 dyn/cm2, EC migration was inhibited on GRGDSP-IPN surfaces, which may be attributed to the assembly of large focal adhesions induced by shear stress, suggesting a catch-bond characteristic for RGD-integrin binding. This study provides a rational base for surface engineering of cardiovascular implants.
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Affiliation(s)
- Shyam Patel
- Department of Bioengineering, University of California at Berkeley, Berkeley, California 94720, USA
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31
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Herde K, Hartmann S, Brehm R, Kilian O, Heiss C, Hild A, Alt V, Bergmann M, Schnettler R, Wenisch S. Connexin 43 expression of foreign body giant cells after implantation of nanoparticulate hydroxyapatite. Biomaterials 2007; 28:4912-21. [PMID: 17719629 DOI: 10.1016/j.biomaterials.2007.07.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Accepted: 07/15/2007] [Indexed: 12/28/2022]
Abstract
In bone a role of connexin 43 has been implicated with the fusion of mononuclear precursors of the monocyte/macrophage lineage into multinucleated cells. In order to investigate the putative role of connexin 43 in formation of bone osteoclast-like foreign body giant cells which are formed in response to implantation of biomaterials, nanoparticulate hydroxyapatite had been implanted into defects of minipig femura. After 20 days the defect areas were harvested and connexin 43 expression and synthesis were investigated by using immunohistochemistry, Western Blot, and in situ hybridization within macrophages and osteoclast-like foreign body giant cells. Morphological analysis of gap junctions is performed ultrastructurally. As shown on protein and mRNA level numerous connexin 43 positive macrophages and foreign body giant cells (FBGC) were localized within the granulation tissue and along the surfaces of the implanted hydroxyapatite (HA). Besides, the formation of FBGC by fusion of macrophages could be shown ultrastructurally. Connexin 43 labeling observed on the protein and mRNA level could be attributed to gap junctions identified ultrastructurally between macrophages, between FBGC, and between FBGC and macrophages. Annular gap junctions in the cytoplasm of FBGC pointed to degradation of the channels, and the ubiquination that had occurred in the course of degradation was confirmed by Western blot analysis. All in all, the presently observed pattern of connexin 43 labeling refers to an functional role of gap junctional communication in the formation of osteoclast-like foreign body giant cells formed in response to implantation of the nanoparticulate HA.
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Affiliation(s)
- Katja Herde
- Institute of Veterinary Anatomy, University of Giessen, Frankfurter Str 98, 35392, Giessen, Germany.
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32
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Barber TA, Ho JE, De Ranieri A, Virdi AS, Sumner DR, Healy KE. Peri-implant bone formation and implant integration strength of peptide-modified p(AAM-co-EG/AAC) interpenetrating polymer network-coated titanium implants. J Biomed Mater Res A 2007; 80:306-20. [PMID: 16960836 DOI: 10.1002/jbm.a.30927] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Interpenetrating polymer networks (IPNs) of poly (acrylamide-co-ethylene glycol/acrylic acid) functionalized with an -Arg-Gly-Asp- (RGD) containing 15 amino acid peptides, derived from rat bone sialoprotein (bsp-RGD(15), were grafted to titanium implants in an effort to modulate bone formation in the peri-implant region in the rat femoral ablation model. Bone-implant contact (BIC) and bone formation within the medullary canal were determined using microcomputed tomography at 2 and 4 weeks postimplantation. BIC for bsp-RGD(15)-IPN implants was enhanced relative to hydroxyapatite tricalcium phosphate (HA-TCP) coated implants, but was similar to all other groups. Aggregate bone formation neither indicated a dose-dependent effect of bsp-RGD(15) nor a meaningful trend. Mechanical testing of implant fixation revealed that only the HA-TCP coated implants supported significant (>1 MPa) interfacial shear strength, despite exhibiting lower overall BIC, an indication that bone ingrowth into the rougher coating was the primary mode of implant fixation. While no evidence was found to support the hypothesis that bsp-RGD(15)-modified IPN coated implants significantly impacted bone-implant bonding, these results point to the lack of correlation between in vitro studies employing primary osteoblasts and in vivo wound healing in the peri-implant region.
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Affiliation(s)
- Thomas A Barber
- Department of Bioengineering, University of California at Berkeley, Berkeley, California 94720, USA
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Dinnes DLM, Marçal H, Mahler SM, Santerre JP, Labow RS. Material surfaces affect the protein expression patterns of human macrophages: A proteomics approach. J Biomed Mater Res A 2006; 80:895-908. [PMID: 17072854 DOI: 10.1002/jbm.a.30967] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Monocyte-derived macrophages (MDM) are key inflammatory cells and are central to the foreign body response to implant materials. MDM have been shown to exhibit changes in actin cytoskeleton, multinucleation, cell size, and function in response to small alterations in polycarbonate-urethane (PCNU) surface chemistry. Although PCNU chemistry has an influence on de novo protein synthesis, no assessments of the protein expression profiles of MDM have yet been reported. The rapid emerging field of expression proteomics facilitates the study of changes in cellular protein profiles in response to their microenvironment. The current study applied proteomic techniques, 2-dimensional electrophoresis (2-DE) combined with MALDI-ToF (matrix assisted laser desorption ionization-time of flight) mass spectrometry, to determine differences in MDM protein expression influenced by PCNU. Results indicated that MDM responded to material chemistry by modulation of structural proteins (i.e. actin, vimentin, and tubulin). Additionally, intracellular protein modulation which requires proteins responsible for trafficking (i.e. chaperone proteins) and protein structure modification (i.e. bond rearrangement and protein folding) were also altered. This study demonstrated for the first time that a proteomics approach was able to detect protein expression profile changes in MDM cultured on different material surfaces, forming the basis for utilizing further quantitative proteomics techniques that could assist in elucidation of the mechanisms involved in MDM-material interaction.
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Affiliation(s)
- Donna Lee M Dinnes
- Department of Surgery, Faculty of Medicine, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, Canada
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