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Ibarra V, Appel AA, Anastasio MA, Opara EC, Brey EM. This paper is a winner in the Undergraduate category for the SFB awards: Evaluation of the tissue response to alginate encapsulated islets in an omentum pouch model. J Biomed Mater Res A 2016; 104:1581-90. [PMID: 27144389 PMCID: PMC5897127 DOI: 10.1002/jbm.a.35769] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 04/02/2016] [Accepted: 04/29/2016] [Indexed: 12/21/2022]
Abstract
Islet transplantation is currently in clinical use as a treatment for type I diabetes, but donor shortages and long-term immunosuppression limit broad application. Alginate microcapsules coated with poly-l-ornithine can be used to encapsulate islets in an environment that allows diffusion of glucose, insulin, nutrients, and waste products while inhibiting cells and antibodies. While clinical trials are ongoing using islets encapsulated in alginate microbeads, there are concerns in regards to long-term stability. Evaluation of the local tissue response following implantation provides insight into the underlying mechanisms contributing to biomaterial failure, which can be used to the design of new material strategies. Macrophages play an important role in driving the response. In this study, the stability of alginate microbeads coated with PLO containing islets transplanted in the omentum pouch model was investigated. Biomaterial structure and the inflammatory response were characterized by X-ray phase contrast (XPC) μCT imaging, histology, and immunostaining. XPC allowed evaluation of microbead 3D structure and identification of failed and stable microbeads. A robust inflammatory response characterized by high cell density and the presence of pro-inflammatory macrophages was found around the failed grafts. The results obtained provide insight into the local tissue response and possible failure mechanisms for alginate microbeads. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 1581-1590, 2016.
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Affiliation(s)
- Veronica Ibarra
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois
| | - Alyssa A Appel
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois
| | - Mark A Anastasio
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri
| | - Emmanuel C Opara
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, Illinois
| | - Eric M Brey
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois
- Research Services, Edward Hines Jr. VA Hospital, Ines, IL
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Abstract
The ability to three-dimensionally interweave biological and functional materials could enable the creation of bionic devices possessing unique and compelling geometries, properties, and functionalities. Indeed, interfacing high performance active devices with biology could impact a variety of fields, including regenerative bioelectronic medicines, smart prosthetics, medical robotics, and human-machine interfaces. Biology, from the molecular scale of DNA and proteins, to the macroscopic scale of tissues and organs, is three-dimensional, often soft and stretchable, and temperature sensitive. This renders most biological platforms incompatible with the fabrication and materials processing methods that have been developed and optimized for functional electronics, which are typically planar, rigid and brittle. A number of strategies have been developed to overcome these dichotomies. One particularly novel approach is the use of extrusion-based multi-material 3D printing, which is an additive manufacturing technology that offers a freeform fabrication strategy. This approach addresses the dichotomies presented above by (1) using 3D printing and imaging for customized, hierarchical, and interwoven device architectures; (2) employing nanotechnology as an enabling route for introducing high performance materials, with the potential for exhibiting properties not found in the bulk; and (3) 3D printing a range of soft and nanoscale materials to enable the integration of a diverse palette of high quality functional nanomaterials with biology. Further, 3D printing is a multi-scale platform, allowing for the incorporation of functional nanoscale inks, the printing of microscale features, and ultimately the creation of macroscale devices. This blending of 3D printing, novel nanomaterial properties, and 'living' platforms may enable next-generation bionic systems. In this review, we highlight this synergistic integration of the unique properties of nanomaterials with the versatility of extrusion-based 3D printing technologies to interweave nanomaterials and fabricate novel bionic devices.
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Affiliation(s)
- Yong Lin Kong
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Maneesh K. Gupta
- Air Force Research Laboratories, Wright-Patterson Air Force Base, Ohio 45433, USA
| | - Blake N. Johnson
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Michael C. McAlpine
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, 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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Tengood JE, Levy RJ, Stachelek SJ. The use of CD47-modified biomaterials to mitigate the immune response. Exp Biol Med (Maywood) 2016; 241:1033-41. [PMID: 27190273 DOI: 10.1177/1535370216647130] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Addressing the aberrant interactions between immune cells and biomaterials represents an unmet need in biomaterial research. Although progress has been made in the development of bioinert coatings, identifying and targeting relevant cellular and molecular pathways can provide additional therapeutic strategies to address this major healthcare concern. To that end, we describe the immune inhibitory motif, receptor-ligand pairing of signal regulatory protein alpha and its cognate ligand CD47 as a potential signaling pathway to enhance biocompatibility. The goals of this article are to detail the known roles of CD47-signal regulatory protein alpha signal transduction pathway and to describe how immobilized CD47 can be used to mitigate the immune response to biomaterials. Current applications of CD47-modified biomaterials will also be discussed herein.
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Affiliation(s)
- Jillian E Tengood
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Robert J Levy
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Stanley J Stachelek
- Division of Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA 19104, USA
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105
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Oladosu FA, Ciszek BP, O'Buckley SC, Nackley AG. Novel intrathecal and subcutaneous catheter delivery systems in the mouse. J Neurosci Methods 2016; 264:119-128. [PMID: 26976722 DOI: 10.1016/j.jneumeth.2016.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 03/03/2016] [Accepted: 03/07/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Catheter systems that permit targeted delivery of genes, molecules, ligands, and other agents represent an investigative tool critical to the development of clinically relevant animal models that facilitate the study of neurological health and disease. The development of new sustained catheter delivery systems to spinal and peripheral sites will reduce the need for repeated injections, while ensuring constant levels of drug in plasma and tissues. NEW METHOD Here, we introduce two novel catheter delivery systems in the mouse: the O'Buckley intrathecal catheter system for sustained delivery to the spinal region and a subcutaneous bifurcated catheter system for sustained drug delivery to both hindpaws. RESULTS The O'Buckley intrathecal catheter system consistently distributed Evans Blue throughout the spinal cord, with the greatest concentration at the thoracic region, and with an 85% surgery success rate. The subcutaneous catheter system consistently distributed Evans Blue to the hindlimbs, with a 100% surgery success rate. COMPARISON TO EXISTING METHOD The O'Buckley intrathecal catheter system accomplishes sustained drug delivery to the spinal region, with a 2-fold increase in surgery success rate, as compared to the traditional method. Our subcutaneous bifurcated catheter system accomplishes sustained drug delivery to both hindpaws, eliminating the need for repeated intraplantar injections. CONCLUSIONS We have developed catheter systems that improve upon traditional methods in order to achieve sustained localized drug delivery to spinal tissues and to hindpaw tissues surrounding peripheral sciatic nerve terminals. These methods have a broad reach, and can be used to enhance behavioral, physiologic and mechanistic studies in mice.
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Affiliation(s)
- Folabomi A Oladosu
- Curriculum of Neurobiology, University of North Carolina, Chapel Hill, 27599 NC, USA.
| | - Brittney P Ciszek
- Curriculum of Oral Biology, University of North Carolina, Chapel Hill, 27599 NC, USA.
| | - Sandra C O'Buckley
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, 905 South LaSalle Street, Durham, 27710 NC, USA.
| | - Andrea G Nackley
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, 905 South LaSalle Street, Durham, 27710 NC, USA.
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Total knee replacement induces peripheral blood lymphocytes apoptosis and it is not prevented by regional anesthesia - a randomized study. Braz J Anesthesiol 2016; 66:133-9. [PMID: 26952220 DOI: 10.1016/j.bjane.2014.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/16/2014] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Among the many changes caused by a surgical insult one of the least studied is postoperative immunosuppression. This phenomenon is an important cause of infectious complications of surgery such as surgical site infection or hospital acquired pneumonia. One of the mechanisms leading to postoperative immunosuppression is the apoptosis of immunological cells. Anesthesia during surgery is intended to minimize harmful changes and maintain perioperative homeostasis. The aim of the study was evaluation of the effect of the anesthetic technique used for total knee replacement on postoperative peripheral blood lymphocyte apoptosis. METHODS 34 patients undergoing primary total knee replacement were randomly assigned to two regional anesthetic protocols: spinal anesthesia and combined spinal-epidural anesthesia. 11 patients undergoing total knee replacement under general anesthesia served as control group. Before surgery, immediately after surgery, during first postoperative day and seven days after the surgery venous blood samples were taken and the immunological status of the patient was assessed with the use of flow cytometry, along with lymphocyte apoptosis using fluorescent microscopy. RESULTS Peripheral blood lymphocyte apoptosis was seen immediately in the postoperative period and was accompanied by a decrease of the number of T cells and B cells. There were no significant differences in the number of apoptotic lymphocytes according to the anesthetic protocol. Changes in the number of T CD3/8 cells and the number of apoptotic lymphocytes were seen on the seventh day after surgery. CONCLUSION Peripheral blood lymphocyte apoptosis is an early event in the postoperative period that lasts up to seven days and is not affected by the choice of the anesthetic technique.
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Thangavelu M, R Narasimha R, Adithan A, A C, Jong-Hoon K, Thotapalli Parvathaleswara S. Reengineered graft copolymers as a potential alternative for the bone tissue engineering application by inducing osteogenic markers expression and biocompatibility. Colloids Surf B Biointerfaces 2016; 143:15-26. [PMID: 26998863 DOI: 10.1016/j.colsurfb.2016.03.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/22/2016] [Accepted: 03/06/2016] [Indexed: 11/24/2022]
Abstract
Composite scaffolds of nano-hydroxyapatite with demineralized bone matrix were prepared and they were graft copolymerized for better bone regeneration and drug delivery applications. The graft copolymers were characterized for their physiochemical properties using conventional methods like FTIR, TGA, XRD and SEM. The scaffolds were seeded with 3T3 and MG63 cells for studying their biocompatibility and their temporal expression of ALP activity, the rate of calcium deposition and their gene expression of collagen type I (Coll-1), osteopontin (OP), osteonectin (ON), and osteocalcin (OC) were studied. In vivo studies were conducted using sub-cutaneous implantation models in male Wister rats for 6 months. Periodic radiography and post-autopsy histopathology was analysed at 15days, 1, 2, 3, 4, 5, and 6 months. The obtained in vitro results clearly confirm that the bone scaffolds prepared in this study are biocompatible, superior osteoinductivity, capable of supporting growth, maturation of MG 63 osteoblast like cells; the gene expression profile revealed that the material is capable of supporting the in vitro growth and maturation of osteoblast-like cells and maturation. The in vivo results stand a testimony to the in vitro results in proving the biocompatibility and osteoinductivity of the materials.
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Affiliation(s)
- Muthukumar Thangavelu
- Bio-Products Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600-020, Tamil Nadu, India; Department of Physiology, College of Veterinary Medicine, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-Do 570-752, Republic of Korea.
| | - Raghavan R Narasimha
- Bio-Products Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600-020, Tamil Nadu, India
| | - Aravinthan Adithan
- Department of Physiology, College of Veterinary Medicine, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-Do 570-752, Republic of Korea
| | - Chandrasekaran A
- Senior Consultant, Chennai Orthopaedic Care and Research Centre, Plot 19, Ashok Brindhavan, Ist Main Road, Iyyappanthangal, Chennai 600056, India
| | - Kim Jong-Hoon
- Department of Physiology, College of Veterinary Medicine, Chonbuk National University, 79 Gobong-ro, Iksan-city, Jeollabuk-Do 570-752, Republic of Korea.
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108
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Darville N, van Heerden M, Erkens T, De Jonghe S, Vynckier A, De Meulder M, Vermeulen A, Sterkens P, Annaert P, Van den Mooter G. Modeling the Time Course of the Tissue Responses to Intramuscular Long-acting Paliperidone Palmitate Nano-/Microcrystals and Polystyrene Microspheres in the Rat. Toxicol Pathol 2015; 44:189-210. [DOI: 10.1177/0192623315618291] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Long-acting injectable (LAI) drug suspensions consist of drug nano-/microcrystals suspended in an aqueous vehicle and enable prolonged therapeutic drug exposure up to several months. The examination of injection site reactions (ISRs) to the intramuscular (IM) injection of LAI suspensions is relevant not only from a safety perspective but also for the understanding of the pharmacokinetics. The aim of this study was to perform a multilevel temporal characterization of the local and lymphatic histopathological/immunological alterations triggered by the IM injection of an LAI paliperidone palmitate suspension and an analog polystyrene suspension in rats and identify critical time points and parameters with regard to the host response. The ISRs showed a moderate to marked chronic granulomatous inflammation, which was mediated by multiple cyto-/chemokines, including interleukin-1β, monocyte Chemoattractant Protein-1, and vascular endothelial growth factor. Lymphatic uptake and lymph node retention of nano-/microparticles were observed, but the contribution to the drug absorption was negligible. A simple image analysis procedure and empirical model were proposed for the accurate evaluation of the depot geometry, cell infiltration, and vascularization. This study was designed as a reference for the evaluation and comparison of future LAIs and to support the mechanistic modeling of the formulation–physiology interplay regulating the drug absorption from LAIs.
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Affiliation(s)
- Nicolas Darville
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven—University of Leuven, Leuven, Belgium
- Model Based Drug Development, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
- These authors contributed equally
| | - Marjolein van Heerden
- Preclinical Development and Safety, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
- These authors contributed equally
| | - Tim Erkens
- Preclinical Development and Safety, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - Sandra De Jonghe
- Preclinical Development and Safety, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - An Vynckier
- Preclinical Development and Safety, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - Marc De Meulder
- Preclinical Development and Safety, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - An Vermeulen
- Model Based Drug Development, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - Patrick Sterkens
- Preclinical Development and Safety, Janssen Research & Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - Pieter Annaert
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven—University of Leuven, Leuven, Belgium
| | - Guy Van den Mooter
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven—University of Leuven, Leuven, Belgium
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109
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Cell-laden Polymeric Microspheres for Biomedical Applications. Trends Biotechnol 2015; 33:653-666. [DOI: 10.1016/j.tibtech.2015.09.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 08/10/2015] [Accepted: 09/08/2015] [Indexed: 01/16/2023]
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Brugmans M, Sӧntjens S, Cox M, Nandakumar A, Bosman A, Mes T, Janssen H, Bouten C, Baaijens F, Driessen-Mol A. Hydrolytic and oxidative degradation of electrospun supramolecular biomaterials: In vitro degradation pathways. Acta Biomater 2015; 27:21-31. [PMID: 26316031 DOI: 10.1016/j.actbio.2015.08.034] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 08/12/2015] [Accepted: 08/22/2015] [Indexed: 12/12/2022]
Abstract
The emerging field of in situ tissue engineering (TE) of load bearing tissues places high demands on the implanted scaffolds, as these scaffolds should provide mechanical stability immediately upon implantation. The new class of synthetic supramolecular biomaterial polymers, which contain non-covalent interactions between the polymer chains, thereby forming complex 3D structures by self assembly. Here, we have aimed to map the degradation characteristics of promising (supramolecular) materials, by using a combination of in vitro tests. The selected biomaterials were all polycaprolactones (PCLs), either conventional and unmodified PCL, or PCL with supramolecular hydrogen bonding moieties (either 2-ureido-[1H]-pyrimidin-4-one or bis-urea units) incorporated into the backbone. As these materials are elastomeric, they are suitable candidates for cardiovascular TE applications. Electrospun scaffold strips of these materials were incubated with solutions containing enzymes that catalyze hydrolysis, or solutions containing oxidative species. At several time points, chemical, morphological, and mechanical properties were investigated. It was demonstrated that conventional and supramolecular PCL-based polymers respond differently to enzyme-accelerated hydrolytic or oxidative degradation, depending on the morphological and chemical composition of the material. Conventional PCL is more prone to hydrolytic enzymatic degradation as compared to the investigated supramolecular materials, while, in contrast, the latter materials are more susceptible to oxidative degradation. Given the observed degradation pathways of the examined materials, we are able to tailor degradation characteristics by combining selected PCL backbones with additional supramolecular moieties. The presented combination of in vitro test methods can be employed to screen, limit, and select biomaterials for pre-clinical in vivo studies targeted to different clinical applications.
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111
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Wang L, Ren L, Tang T, Dai K, Yang K, Hao Y. A novel nano-copper-bearing stainless steel with reduced Cu(2+) release only inducing transient foreign body reaction via affecting the activity of NF-κB and Caspase 3. Int J Nanomedicine 2015; 10:6725-39. [PMID: 26604748 PMCID: PMC4631433 DOI: 10.2147/ijn.s90249] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Foreign body reaction induced by biomaterials is a serious problem in clinical applications. Although 317L-Cu stainless steel (317L-Cu SS) is a new type of implant material with antibacterial ability and osteogenic property, the foreign body reaction level still needs to be assessed due to its Cu(2+) releasing property. For this purpose, two macrophage cell lines were selected to detect cellular proliferation, apoptosis, mobility, and the secretions of inflammatory cytokines with the influence of 317L-Cu SS. Our results indicated that 317L-Cu SS had no obvious effect on the proliferation and apoptosis of macrophages; however, it significantly increased cellular migration and TNF-α secretion. Then, C57 mice were used to assess foreign body reaction induced by 317L-Cu SS. We observed significantly enhanced recruitment of inflammatory cells (primarily macrophages) with increased TNF-α secretion and apoptosis level in tissues around the materials in the early stage of implantation. With tissue healing, both inflammation and apoptosis significantly decreased. Further, we discovered that NF-κB pathway and Caspase 3 played important roles in 317L-Cu SS induced inflammation and apoptosis. We concluded that 317L-Cu SS could briefly promote the inflammation and apoptosis of surrounding tissues by regulating the activity of NF-κB pathway and Caspase 3. All these discoveries demonstrated that 317L-Cu SS has a great potential for clinical application.
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Affiliation(s)
- Lei Wang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedics, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People’s Republic of China
| | - Ling Ren
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of China
| | - Tingting Tang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedics, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People’s Republic of China
| | - Kerong Dai
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedics, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People’s Republic of China
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of China
| | - Yongqiang Hao
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedics, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People’s Republic of China
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112
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Vogels RRM, Lambertz A, Schuster P, Jockenhoevel S, Bouvy ND, Disselhorst‐Klug C, Neumann UP, Klinge U, Klink CD. Biocompatibility and biomechanical analysis of elastic
TPU
threads as new suture material. J Biomed Mater Res B Appl Biomater 2015; 105:99-106. [DOI: 10.1002/jbm.b.33531] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 08/17/2015] [Accepted: 09/12/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Ruben R. M. Vogels
- Department of General, Visceral and Transplantation SurgeryRWTH Aachen UniversityAachen Germany
- Department of General SurgeryMaastricht University Medical CentreMaastricht The Netherlands
| | - Andreas Lambertz
- Department of General, Visceral and Transplantation SurgeryRWTH Aachen UniversityAachen Germany
| | - Philipp Schuster
- Institut fuer Textiltechnik at RWTH Aachen UniversityAachen Germany
| | | | - Nicole D. Bouvy
- Department of General SurgeryMaastricht University Medical CentreMaastricht The Netherlands
| | - Catherine Disselhorst‐Klug
- Department of Rehabilitation & Prevention Engineering, Institute of Applied Medical EngineeringRWTH Aachen UniversityAachen Germany
| | - Ulf P. Neumann
- Department of General, Visceral and Transplantation SurgeryRWTH Aachen UniversityAachen Germany
| | - Uwe Klinge
- Department of General, Visceral and Transplantation SurgeryRWTH Aachen UniversityAachen Germany
| | - Christian D. Klink
- Department of General, Visceral and Transplantation SurgeryRWTH Aachen UniversityAachen Germany
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113
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Kim YK, Chen EY, Liu WF. Biomolecular strategies to modulate the macrophage response to implanted materials. J Mater Chem B 2015; 4:1600-1609. [PMID: 32263014 DOI: 10.1039/c5tb01605c] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The material-induced foreign body response is a major challenge for implanted medical devices. This review highlights recent developments in biomimetic approaches to create biomaterials that mitigate the host response to biomaterials. Specifically, we will describe strategies in which biomaterials are decorated with endogenously expressed biomolecules that naturally modulate the function of immune cells. These include molecules that directly bind to and interact with immune cells, as well as molecules that control complement activation or thrombosis and indirectly modulate immune cell function. We provide perspective on how these approaches may impact the design of materials for medical devices and tissue engineering.
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Affiliation(s)
- Yoon Kyung Kim
- Department of Biomedical Engineering, University of California Irvine, 2412 Engineering Hall, Irvine, CA 92697, USA.
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114
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Ong SM, Biswas SK, Wong SC. MicroRNA-mediated immune modulation as a therapeutic strategy in host-implant integration. Adv Drug Deliv Rev 2015; 88:92-107. [PMID: 26024977 DOI: 10.1016/j.addr.2015.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 05/05/2015] [Accepted: 05/21/2015] [Indexed: 12/29/2022]
Abstract
The concept of implanting an artificial device into the human body was once the preserve of science fiction, yet this approach is now often used to replace lost or damaged biological structures in human patients. However, assimilation of medical devices into host tissues is a complex process, and successful implant integration into patients is far from certain. The body's immediate response to a foreign object is immune-mediated reaction, hence there has been extensive research into biomaterials that can reduce or even ablate anti-implant immune responses. There have also been attempts to embed or coat anti-inflammatory drugs and pro-regulatory molecules onto medical devices with the aim of preventing implant rejection by the host. In this review, we summarize the key immune mediators of medical implant reaction, and we evaluate the potential of microRNAs to regulate these processes to promote wound healing, and prolong host-implant integration.
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Affiliation(s)
- Siew-Min Ong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos Building, Level 4, Biopolis, Singapore 138648, Singapore
| | - Subhra K Biswas
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos Building, Level 4, Biopolis, Singapore 138648, Singapore
| | - Siew-Cheng Wong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Immunos Building, Level 4, Biopolis, Singapore 138648, Singapore.
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115
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Affiliation(s)
- Ruud A Bank
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands
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116
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Pascual G, Sotomayor S, Rodríguez M, Bayon Y, Bellón JM. Tissue integration and inflammatory reaction in full-thickness abdominal wall repair using an innovative composite mesh. Hernia 2015; 20:607-22. [PMID: 25903676 DOI: 10.1007/s10029-015-1383-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 04/11/2015] [Indexed: 01/31/2023]
Abstract
PURPOSE When composite meshes are used in abdominal wall repair, seroma formation may persist and delay the desired integration leading to recurrence. This study compares tissue integration and inflammatory response in abdominal wall repair with composites with different absorbable synthetic barriers. METHODS Full-thickness defects created in the abdominal wall of rabbits were repaired using polypropylene prosthesis or the following composites: Physiomesh™ (Phy); Ventralight™ (Vent) and "new composite mesh" (Ncm) not yet used clinically in humans. The collected seroma was evaluated for IFN-γ/IL-4 by ELISA. Tissue integration, anti- (IL-13/TGFβ-1/IL-10/IL-4) and pro-inflammatory (TNF-α/IL-6/IFN-γ/VEGF) cytokine mRNA expression and TGFβ/VEGF immunolabeling were evaluated at 14 and 90 days post-implant. RESULTS Seroma was observed in 10 of 12 Phy/Vent and 4 of 12 Ncm. Wound fluid IFN-γ showed a time-dependent significant increase in Vent and tendency to decrease in Ncm, while all composites exhibited IL-4 upward trend. Prostheses were fully infiltrated by an organized connective tissue at end time although the area had shown prior seroma. A stable mesothelium was developed, except in adhesion areas. Vent/Phy displayed a significant increase in TNF-α/IFN-γ-mRNA over time. Significant decrease in VEGF mRNA was observed in Phy/Ncm, while a significant increase of TGFβ-1 mRNA was evident in all composites over time. Ncm exhibited the highest TGFβ protein expression area at short term and the greatest percentage of VEGF positive vessels at end time. CONCLUSION Ncm could be an appropriate candidate to improve clinical outcome showing the lower development of seroma and optimal tissue integration with minimal pro-inflammatory cytokine response over time and consistent pro-wound healing cytokine expression.
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Affiliation(s)
- G Pascual
- Department of Medicine and Medical Specialties, Faculty of Medicine and Health Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km 33,600, 28871, Alcalá De Henares, Madrid, Spain. .,Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain.
| | - S Sotomayor
- Department of Medicine and Medical Specialties, Faculty of Medicine and Health Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km 33,600, 28871, Alcalá De Henares, Madrid, Spain.,Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - M Rodríguez
- Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km 33,600, 28871, Alcalá De Henares, Madrid, Spain.,Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Y Bayon
- Covidien-Sofradim Production, 116 Avenue du Formans, 01600, Trévoux, France
| | - J M Bellón
- Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km 33,600, 28871, Alcalá De Henares, Madrid, Spain.,Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
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Mao L, Shen L, Chen J, Wu Y, Kwak M, Lu Y, Xue Q, Pei J, Zhang L, Yuan G, Fan R, Ge J, Ding W. Enhanced bioactivity of Mg-Nd-Zn-Zr alloy achieved with nanoscale MgF2 surface for vascular stent application. ACS APPLIED MATERIALS & INTERFACES 2015; 7:5320-30. [PMID: 25705919 DOI: 10.1021/am5086885] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Magnesium (Mg) alloys have revolutionized the application of temporary load-bearing implants as they meet both engineering and medical requirements. However, rapid degradation of Mg alloys under physiological conditions remains the major obstacle hindering the wider use of Mg-based implants. Here we developed a simple method of preparing a nanoscale MgF2 film on Mg-Nd-Zn-Zr (denoted as JDBM) alloy, aiming to reduce the corrosion rate as well as improve the biological response. The corrosion rate of JDBM alloy exposed to artificial plasma is reduced by ∼20% from 0.337 ± 0.021 to 0.269 ± 0.043 mm·y(-1) due to the protective effect of the MgF2 film with a uniform and dense physical structure. The in vitro cytocompatibility test of MgF2-coated JDBM using human umbilical vein endothelial cells indicates enhanced viability, growth, and proliferation as compared to the naked substrate, and the MgF2 film with a nanoscale flakelike feature of ∼200-300 nm presents a much more favorable environment for endothelial cell adhesion, proliferation, and alignment. Furthermore, the animal experiment via implantation of MgF2-coated JDBM stent to rabbit abdominal aorta confirms excellent tissue compatibility of the well re-endothelialized stent with no sign of thrombogenesis and restenosis in the stented vessel.
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Affiliation(s)
- Lin Mao
- National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University , Shanghai 200240, China
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118
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[Total knee replacement induces peripheral blood lymphocytes apoptosis and it is not prevented by regional anesthesia - a randomized study]. Rev Bras Anestesiol 2015; 66:133-9. [PMID: 25746338 DOI: 10.1016/j.bjan.2014.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/16/2014] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Among the many changes caused by a surgical insult one of the least studied is postoperative immunosuppression. This phenomenon is an important cause of infectious complications of surgery such as surgical site infection or hospital acquired pneumonia. One of the mechanisms leading to postoperative immunosuppression is the apoptosis of immunological cells. Anesthesia during surgery is intended to minimize harmful changes and maintain perioperative homeostasis. The aim of the study was evaluation the effect of the anesthetic technique used for total knee replacement on postoperative peripheral blood lymphocyte apoptosis. METHODS 34 patients undergoing primary total knee replacement were randomly assigned to two regional anesthetic protocols: spinal anesthesia and combined spinal-epidural anesthesia. 11 patients undergoing total knee replacement under general anesthesia served as control group. Before surgery, immediately after surgery, during first postoperative day and seven days after the surgery venous blood samples were taken and the immunological status of the patient was assessed with the use of flow cysts 87 m, along with lymphocyte apoptosis using fluorescent microscopy. RESULTS Peripheral blood lymphocyte apoptosis was seen immediately in the postoperative period and was accompanied by a decrease of the number of T cells and B cells. There were no significant differences in the number of apoptotic lymphocytes according to the anesthetic protocol. Changes in the number of T CD3/8 cells and the number of apoptotic lymphocytes were seen on the seventh day after surgery. CONCLUSION Peripheral blood lymphocyte apoptosis is an early event in the postoperative period lasts up to seven days and is not affected by the choice of the anesthetic technique.
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119
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Wang K, Yu LY, Jiang LY, Wang HB, Wang CY, Luo Y. The paracrine effects of adipose-derived stem cells on neovascularization and biocompatibility of a macroencapsulation device. Acta Biomater 2015; 15:65-76. [PMID: 25575852 DOI: 10.1016/j.actbio.2014.12.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 12/11/2014] [Accepted: 12/24/2014] [Indexed: 12/12/2022]
Abstract
The foreign-body response to biomaterials compromises the performance of many biomedical devices by severe fibrosis and limited neovascularization. Mesenchymal stem cells are known to secrete cytokines for treating inflammatory conditions. In this study, we aim to investigate whether the paracrine products of adipose-derived mesenchymal stem cells (ADSCs) can affect the microenvironment of biomaterials and improve tissue responses to biomaterial implants. A model system was built by loading ADSC spheroids into a macroencapsulation device composed of polytetrafluoroethylene (PTFE) filtration membranes. Soluble ADSC factors that diffused out of the device in vitro promoted the angiogenetic activity of endothelial cells and affected the secretion pattern of macrophages. In vivo study was carried out by subcutaneously embedding blank or ADSC-laden devices in rats. Following a 4 week implantation, the ADSC-laden devices were better vascularized and induced significantly less fibrotic tissue formation in comparison to the non-cellular controls. This study may facilitate our understanding of foreign-body responses and suggest new ways to improve the tissue reaction of biomedical devices for cell-based therapy.
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120
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Gabbai-Armelin PR, Souza MT, Kido HW, Tim CR, Bossini PS, Fernandes KR, Magri AMP, Parizotto NA, Fernandes KPS, Mesquita-Ferrari RA, Ribeiro DA, Zanotto ED, Peitl O, Renno ACM. Characterization and biocompatibility of a fibrous glassy scaffold. J Tissue Eng Regen Med 2015; 11:1141-1151. [PMID: 25712803 DOI: 10.1002/term.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 12/16/2014] [Accepted: 01/15/2015] [Indexed: 01/22/2023]
Abstract
Bioactive glasses (BGs) are known for their ability to bond to living bone and cartilage. In general, they are readily available in powder and monolithic forms, which are not ideal for the optimal filling of bone defects with irregular shapes. In this context, the development of BG-based scaffolds containing flexible fibres is a relevant approach to improve the performance of BGs. This study is aimed at characterizing a new, highly porous, fibrous glassy scaffold and evaluating its in vitro and in vivo biocompatibility. The developed scaffolds were characterized in terms of porosity, mineralization and morphological features. Additionally, fibroblast and osteoblast cells were seeded in contact with extracts of the scaffolds to assess cell proliferation and genotoxicity after 24, 72 and 144 h. Finally, scaffolds were placed subcutaneously in rats for 15, 30 and 60 days. The scaffolds presented interconnected porous structures, and the precursor bioglass could mineralize a hydroxyapatite (HCA) layer in simulated body fluid (SBF) after only 12 h. The biomaterial elicited increased fibroblast and osteoblast cell proliferation, and no DNA damage was observed. The in vivo experiment showed degradation of the biomaterial over time, with soft tissue ingrowth into the degraded area and the presence of multinucleated giant cells around the implant. At day 60, the scaffolds were almost completely degraded and an organized granulation tissue filled the area. The results highlight the potential of this fibrous, glassy material for bone regeneration, due to its bioactive properties, non-cytotoxicity and biocompatibility. Future investigations should focus on translating these findings to orthotopic applications. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- P R Gabbai-Armelin
- Post-Graduate Programme of Biotechnology, Federal University of São Carlos (UFSCar), SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - M T Souza
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos (UFSCar), SP, Brazil
| | - H W Kido
- Post-Graduate Programme of Biotechnology, Federal University of São Carlos (UFSCar), SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - C R Tim
- Post-Graduate Programme of Biotechnology, Federal University of São Carlos (UFSCar), SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - P S Bossini
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - K R Fernandes
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - A M P Magri
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - N A Parizotto
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - K P S Fernandes
- Department of Rehabilitation Sciences and Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - R A Mesquita-Ferrari
- Department of Rehabilitation Sciences and Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - D A Ribeiro
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - E D Zanotto
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos (UFSCar), SP, Brazil
| | - O Peitl
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos (UFSCar), SP, Brazil
| | - A C M Renno
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
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Liu X, Zhou L, Pan F, Gao Y, Yuan X, Fan D. Comparison of the postoperative incidence rate of capsular contracture among different breast implants: a cumulative meta-analysis. PLoS One 2015; 10:e0116071. [PMID: 25680100 PMCID: PMC4332657 DOI: 10.1371/journal.pone.0116071] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 12/05/2014] [Indexed: 11/18/2022] Open
Abstract
Background A large number of clinical studies have reported that the different materials used in breast implants were a possible cause of the different incidence rates of capsular contracture observed in patients after implantation. However, this theory lacks comprehensive support from evidence-based medicine, and considerable controversy remains. Objectives In this study, a cumulative systematic review examined breast augmentation that used implants with textured or smooth surfaces to analyze the effects of these two types of implants on the occurrence of postoperative capsular contracture. Methods We conducted a comprehensive search of literature databases, including PubMed and EMBASE, for clinical reports on the incidence of capsular contracture after the implantation of breast prostheses. We performed a cumulative meta-analysis on the incidence of capsular contracture in order from small to large sample sizes and conducted subgroup analyses according to the prosthetic material used, the implant pocket placement, the incision type and the duration of follow-up. Relative risks (RR) and 95% confidence intervals (CI) were used as the final pooled statistics. Results This meta-analysis included 16 randomized controlled trials (RCTs) and two retrospective studies. The cumulative comparison of textured and smooth breast implants showed statistical significance at 2.13 (95% CI, 1.18-3.86) when the fourth study was entered into the analysis. With the inclusion of more reports, the final results indicated that smooth breast implants were more likely to be associated with capsular contracture, with statistical significance at 3.10 (95% CI, 2.23-4.33). In the subgroup analyses, the subgroups based on implant materials included the silicone implant group and the saline implant group, with significant pooled statistical levels of 4.05 (95% CI, 1.97-8.31) and 3.12 (95% CI, 2.19-4.42), respectively. According to implant pocket placement, a subglandular group and a submuscular group were included in the analyses, and only the subglandular group had a statistically significant pooled result of 3.59 (95% CI, 2.43-5.30). Four subgroups were included in the analyses according to incision type: the inframammary incision group, the periareolar incision group, the transaxillary incision group and the mastectomy incision group. Among these groups, only the pooled results of the inframammary and mastectomy incision groups were statistically significant, at 2.82 (95% CI, 1.30-6.11) and 2.30 (95% CI, 1.17-4.50), respectively. Three follow-up duration subgroups were included in the analyses: the one-year group, the two- to three-year group and the ≥five-year group. These subgroups had statistically significant results of 4.67 (95% CI, 2.35-9.28), 3.42 (95% CI, 2.26-5.16) and 2.71 (95% CI, 1.64-4.49), respectively. Conclusion In mammaplasty, the use of textured implants reduces the incidence of postoperative capsular contracture. Differences in implant pocket placement and incision type are also likely to affect the incidence of capsular contracture; however, this conclusion awaits further study.
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Affiliation(s)
- Xing Liu
- Department of Plastic and Cosmetic Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing, China 400037
| | - Liang Zhou
- Department of Health Statistics, College of Preventive Medicine, Third Military Medical University, Chongqing, China 400038
| | - Fuqiang Pan
- Department of Plastic and Aesthetic Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China 400038
| | - Yang Gao
- Department of Plastic and Cosmetic Surgery, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, China 400042
| | - Xi Yuan
- Department of Plastic and Aesthetic Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China 400038
| | - Dongli Fan
- Department of Plastic and Cosmetic Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing, China 400037
- * E-mail:
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Kido HW, Tim CR, Bossini PS, Parizotto NA, de Castro CA, Crovace MC, Rodrigues ACM, Zanotto ED, Peitl Filho O, de Freitas Anibal F, Rennó ACM. Porous bioactive scaffolds: characterization and biological performance in a model of tibial bone defect in rats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:74. [PMID: 25631271 DOI: 10.1007/s10856-015-5411-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 11/06/2014] [Indexed: 06/04/2023]
Abstract
The aim of this study was to evaluate the effects of highly porous Biosilicate(®) scaffolds on bone healing in a tibial bone defect model in rats by means of histological evaluation (histopathological and immunohistochemistry analysis) of the bone callus and the systemic inflammatory response (immunoenzymatic assay). Eighty Wistar rats (12 weeks-old, weighing±300 g) were randomly divided into 2 groups (n=10 per experimental group, per time point): control group and Biosilicate® group (BG). Each group was euthanized 3, 7, 14 and 21 days post-surgery. Histological findings revealed a similar inflammatory response in both experimental groups, 3 and 7 days post-surgery. During the experimental periods (3-21 days post-surgery), it was observed that the biomaterial degradation, mainly in the periphery region, provided the development of the newly formed bone into the scaffolds. Immunohistochemistry analysis demonstrated that the Biosilicate® scaffolds stimulated cyclooxygenase-2, vascular endothelial growth factor and runt-related transcription factor 2 expression. Furthermore, in the immunoenzymatic assay, BG presented no difference in the level of tumor necrosis factor alpha in all experimental periods. Still, BG showed a higher level of interleukin 4 after 14 days post-implantation and a lower level of interleukin 10 in 21 days post-surgery. Our results demonstrated that Biosilicate® scaffolds can contribute for bone formation through a suitable architecture and by stimulating the synthesis of markers related to the bone repair.
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Affiliation(s)
- Hueliton Wilian Kido
- Department of Physiotherapy, Post-Graduate Program of Biotechnology, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil,
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123
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Acute and chronic local inflammatory reaction after implantation of different extracellular porcine dermis collagen matrices in rats. BIOMED RESEARCH INTERNATIONAL 2015; 2015:938059. [PMID: 25648958 PMCID: PMC4310316 DOI: 10.1155/2015/938059] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 10/08/2014] [Accepted: 10/14/2014] [Indexed: 02/04/2023]
Abstract
Two cross-linked acellular porcine dermal collagen matrices (Permacol and NRX) were implanted into rats and the acute and chronic local inflammatory tissue reactions were investigated after 7, 14, 28, and 112 days. Both membranes were stable in vivo for up to 112 days. All investigated immune cell populations (CD68+ macrophages, CD163+ macrophages, T lymphocytes, MHC class II positive cells, mast cells, and NK cells) were present. Their amount decreased significantly over time compared to day 7 after implantation. A change from an acute to a chronic inflammation and an associated shift from proinflammatory M1-like to anti-inflammatory M2-like macrophages were observed. In the early phase there was a significant correlation of T cells to CD68+ (M1-like) macrophages, whereas in the chronic phase T lymphocytes were positively correlated with CD163+ (M2-like) macrophages. The material NRX showed an enhanced inflammatory reaction in comparison to Permacol possibly caused by material characteristics such as a twofold higher thickness of the membrane, roughness, and water absorption capacity. Nevertheless, a more pronounced regenerative process as, for example, indicated by nestin expression demonstrated its possible suitability for applications as wound repair material.
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124
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Liu C, Liu X, Xue Y, Ding T, Sun J. Hydrolyzed tilapia fish collagen modulates the biological behavior of macrophages under inflammatory conditions. RSC Adv 2015. [DOI: 10.1039/c5ra02355f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
This is the first study showing that HFC can inhibit the excessive production of inflammatory mediators in RAW264.7 macrophages.
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Affiliation(s)
- Chao Liu
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Xin Liu
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Yang Xue
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Tingting Ding
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Jiao Sun
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
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125
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Socarrás TO, Vasconcelos AC, Campos PP, Pereira NB, Souza JPC, Andrade SP. Foreign body response to subcutaneous implants in diabetic rats. PLoS One 2014; 9:e110945. [PMID: 25372281 PMCID: PMC4220951 DOI: 10.1371/journal.pone.0110945] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 09/22/2014] [Indexed: 12/26/2022] Open
Abstract
Implantation of synthetic matrices and biomedical devices in diabetic individuals has become a common procedure to repair and/or replace biological tissues. However, an adverse foreign body reaction that invariably occurs adjacent to implant devices impairing their function is poorly characterized in the diabetic environment. We investigated the influence of this condition on the abnormal tissue healing response in implants placed subcutaneously in normoglycemic and streptozotocin-induced diabetes in rats. In polyether-polyurethane sponge discs removed 10 days after implantation, the components of the fibrovascular tissue (angiogenesis, inflammation, fibrogenesis, and apoptosis) were assessed. Intra-implant levels of hemoglobin and vascular endothelial growth factor were not different after diabetes when compared with normoglycemic counterparts. However, there were a lower number of vessels in the fibrovascular tissue from diabetic rats when compared with vessel numbers in implants from non-diabetic animals. Overall, the inflammatory parameters (neutrophil accumulation - myeloperoxidase activity, tumor necrosis factor alpha, and monocyte chemotactic protein-1 levels and mast cell counting) increased in subcutaneous implants after diabetes induction. However, macrophage activation (N-acetyl-β-D-glucosaminidase activity) was lower in implants from diabetic rats when compared with those from normoglycemic animals. All fibrogenic markers (transforming growth factor beta 1 levels, collagen deposition, fibrous capsule thickness, and foreign body giant cells) decreased after diabetes, whereas apoptosis (TUNEL) increased. Our results showing that hyperglycemia down regulates the main features of the foreign body reaction induced by subcutaneous implants in rats may be relevant in understanding biomaterial integration and performance in diabetes.
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Affiliation(s)
- Teresa Oviedo Socarrás
- Department of General Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Livestock Sciences, University of Córdoba, Montería, Córdoba, Colombia
| | - Anilton C. Vasconcelos
- Department of General Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Paula P. Campos
- Department of General Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
| | - Nubia B. Pereira
- Department of General Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jessica P. C. Souza
- Department of General Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Silvia P. Andrade
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Bouvet-Gerbettaz S, Boukhechba F, Balaguer T, Schmid-Antomarchi H, Michiels JF, Scimeca JC, Rochet N. Adaptive Immune Response Inhibits Ectopic Mature Bone Formation Induced by BMSCs/BCP/Plasma Composite in Immune-Competent Mice. Tissue Eng Part A 2014; 20:2950-62. [DOI: 10.1089/ten.tea.2013.0633] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Sébastien Bouvet-Gerbettaz
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- UFR Odontologie F-06357, Université Nice Sophia Antipolis, Nice, France
| | - Florian Boukhechba
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- CNRS, UMR7277, F-06108 Nice, France
- Inserm U1091, F-06108 Nice, France
| | - Thierry Balaguer
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- CNRS, UMR7277, F-06108 Nice, France
- Inserm U1091, F-06108 Nice, France
- Service de Chirurgie Plastique, Centre Hospitalier Universitaire de Nice, Nice, France
| | - Heidy Schmid-Antomarchi
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- CNRS, UMR7277, F-06108 Nice, France
- Inserm U1091, F-06108 Nice, France
| | - Jean-François Michiels
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- Service d'Anatomopathologie, Centre Hospitalier Universitaire de Nice, Nice, France
| | - Jean-Claude Scimeca
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- CNRS, UMR7277, F-06108 Nice, France
- Inserm U1091, F-06108 Nice, France
| | - Nathalie Rochet
- UFR Médecine F-06107, Université Nice Sophia Antipolis, Nice, France
- CNRS, UMR7277, F-06108 Nice, France
- Inserm U1091, F-06108 Nice, France
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Addressing the Inflammatory Response to Clinically Relevant Polymers by Manipulating the Host Response Using ITIM Domain-Containing Receptors. Polymers (Basel) 2014; 6:2526-2551. [PMID: 25705515 PMCID: PMC4333742 DOI: 10.3390/polym6102526] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Tissue contacting surfaces of medical devices initiate a host inflammatory response, characterized by adsorption of blood proteins and inflammatory cells triggering the release of cytokines, reactive oxygen species (ROS) and reactive nitrogen species (RNS), in an attempt to clear or isolate the foreign object from the body. This normal host response contributes to device-associated pathophysiology and addressing device biocompatibility remains an unmet need. Although widespread attempts have been made to render the device surfaces unreactive, the establishment of a completely bioinert coating has been untenable and demonstrates the need to develop strategies based upon the molecular mechanisms that define the interaction between host cells and synthetic surfaces. In this review, we discuss a family of transmembrane receptors, known as immunoreceptor tyrosine-based inhibitory motif (ITIM)-containing receptors, which show promise as potential targets to address aberrant biocompatibility. These receptors repress the immune response and ensure that the intensity of an immune response is appropriate for the stimuli. Particular emphasis will be placed on the known ITIM-containing receptor, Signal Regulatory Protein Alpha (SIRPhα), and its cognate ligand CD47. In addition, this review will discuss the potential of other ITIM-containing proteins as targets for addressing the aberrant biocompatibility of polymeric biomaterials.
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Kakinoki S, Sakai Y, Takemura T, Hanagata N, Fujisato T, Ishihara K, Yamaoka T. Gene chip/PCR-array analysis of tissue response to 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer surfaces in a mouse subcutaneous transplantation system. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1658-72. [DOI: 10.1080/09205063.2014.939917] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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129
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Liu H, Wise SG, Rnjak-Kovacina J, Kaplan DL, Bilek MM, Weiss AS, Fei J, Bao S. Biocompatibility of silk-tropoelastin protein polymers. Biomaterials 2014; 35:5138-47. [DOI: 10.1016/j.biomaterials.2014.03.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 03/12/2014] [Indexed: 01/09/2023]
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130
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Battiston KG, Cheung JWC, Jain D, Santerre JP. Biomaterials in co-culture systems: towards optimizing tissue integration and cell signaling within scaffolds. Biomaterials 2014; 35:4465-76. [PMID: 24602569 DOI: 10.1016/j.biomaterials.2014.02.023] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Accepted: 02/12/2014] [Indexed: 02/07/2023]
Abstract
Most natural tissues consist of multi-cellular systems made up of two or more cell types. However, some of these tissues may not regenerate themselves following tissue injury or disease without some form of intervention, such as from the use of tissue engineered constructs. Recent studies have increasingly used co-cultures in tissue engineering applications as these systems better model the natural tissues, both physically and biologically. This review aims to identify the challenges of using co-culture systems and to highlight different approaches with respect to the use of biomaterials in the use of such systems. The application of co-culture systems to stimulate a desired biological response and examples of studies within particular tissue engineering disciplines are summarized. A description of different analytical co-culture systems is also discussed and the role of biomaterials in the future of co-culture research are elaborated on. Understanding the complex cell-cell and cell-biomaterial interactions involved in co-culture systems will ultimately lead the field towards biomaterial concepts and designs with specific biochemical, electrical, and mechanical characteristics that are tailored towards the needs of distinct co-culture systems.
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Affiliation(s)
- Kyle G Battiston
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 124 Edward Street, Room 461, Toronto, Ontario, Canada M5G 1G6
| | - Jane W C Cheung
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 124 Edward Street, Room 461, Toronto, Ontario, Canada M5G 1G6
| | - Devika Jain
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 124 Edward Street, Room 461, Toronto, Ontario, Canada M5G 1G6
| | - J Paul Santerre
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 124 Edward Street, Room 461, Toronto, Ontario, Canada M5G 1G6; Department of Biomaterials, Faculty of Dentistry, University of Toronto, 124 Edward Street, Room 464D, Toronto, Ontario, Canada M5G 1G6.
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131
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Steiert AE, Boyce M, Sorg H. Capsular contracture by silicone breast implants: possible causes, biocompatibility, and prophylactic strategies. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2013; 6:211-8. [PMID: 24324348 PMCID: PMC3855100 DOI: 10.2147/mder.s49522] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The most common implanted material in the human body consists of silicone. Breast augmentation and breast reconstruction using silicone-based implants are procedures frequently performed by reconstructive and aesthetic surgeons. A main complication of this procedure continues to be the development of capsular contracture (CC), displaying the result of a fibrotic foreign body reaction after the implantation of silicone. For many years, experimental and clinical trials have attempted to analyze the problem of its etiology, treatment, and prophylaxis. Different theories of CC formation are known; however, the reason why different individuals develop CC in days or a month, or only after years, is unknown. Therefore, we hypothesize that CC formation, might primarily be induced by immunological mechanisms along with other reasons. This article attempts to review CC formation, with special attention paid to immunological and inflammatory reasons, as well as actual prophylactic strategies. In this context, the word “biocompatibility” has been frequently used to describe the overall biological innocuousness of silicone in the respective studies, although without clear-cut definitions of this important feature. We have therefore developed a new five-point scale with distinct key points of biocompatibility. Hence, this article might provide the basis for ongoing discussion in this field to reduce single-publication definitions as well as increase the understanding of biocompatibility.
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Affiliation(s)
- Andreas E Steiert
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Hannover, Germany
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132
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Matsushima R, Nam K, Shimatsu Y, Kimura T, Fujisato T, Kishida A. Decellularized dermis-polymer complex provides a platform for soft-to-hard tissue interfaces. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 35:354-62. [PMID: 24411388 DOI: 10.1016/j.msec.2013.11.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 10/04/2013] [Accepted: 11/03/2013] [Indexed: 01/27/2023]
Abstract
To develop a soft-to-hard tissue interface, we made a decellularized dermis/poly(methyl methacrylate) (PMMA) complex by soaking the decellularized dermis in methyl methacrylate (MMA) and an initiator, and then polymerizing the MMA. The decellularized tissue was chosen because of its good biocompatibility and the easiness of suturing it, and MMA because of its hard tissue compatibility and wide use in the biomedical field. The MMA filled the cavities in the dermis and polymerized within 10 min. No leaking or polymer aggregation was observed, implying that a homogenous tissue-polymer complex had formed. The cell infiltration and the integration between the tissue and the dermis occurred in vivo, whereas the cells could not infiltrate the tissue-polymer complex. This implies that the interface tissue should possess both complex and noncomplex parts, where the cells infiltrate the noncomplex part and stop when they encounter the complex part, integrating the soft and hard tissue or hard polymer.
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Affiliation(s)
- Rie Matsushima
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kwangwoo Nam
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan; Japan Science and Technology Agency, CREST, 7 Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan
| | - Yukiko Shimatsu
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Tsuyoshi Kimura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan; Japan Science and Technology Agency, CREST, 7 Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan
| | - Toshiya Fujisato
- Department of Biomedical Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Akio Kishida
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan; Japan Science and Technology Agency, CREST, 7 Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan.
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133
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Fan X, Nosov M, Carroll W, Gorelov A, Elvira C, Rochev Y. Macrophages behavior on different NIPAm-based thermoresponsive substrates. J Biomed Mater Res A 2013; 102:2901-10. [DOI: 10.1002/jbm.a.34940] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/08/2013] [Accepted: 09/05/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Xingliang Fan
- National Centre for Biomedical Engineering Science; National University of Ireland; Galway Ireland
| | - Mikhail Nosov
- Regenerative Medicine Institute; National University of Ireland; Galway Ireland
- FarmLab Diagnostics, Emlagh, Elphin, co; Roscommon Ireland
| | - William Carroll
- School of Chemistry; National University of Ireland; Galway Ireland
| | - Alexander Gorelov
- School of Chemistry and Chemical Biology; University College Dublin; Dublin Ireland
| | - Carlos Elvira
- 1-Instituto de Ciencía y tecnologia de Polímeros; ICTP-CSIC.; Juan de la Cierva 3 20006 Madrid Spain
| | - Yury Rochev
- National Centre for Biomedical Engineering Science; National University of Ireland; Galway Ireland
- School of Chemistry; National University of Ireland; Galway Ireland
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134
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Cena RB, Park JG, Kim HJ, Son KY, Kim DS, Kang MI, Park SI, Moon DG, Yang DY, Yu DS, Lee JI, Cho KO. Effects of crosslinked dextran in hydroxylpropyl methylcellulose on soft tissue augmentation in rats. J Biomed Mater Res B Appl Biomater 2013; 102:131-40. [DOI: 10.1002/jbm.b.32989] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 03/18/2013] [Accepted: 05/26/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Rohani B. Cena
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Jun-Gyu Park
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Hyun-Jeong Kim
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Kyu-Yeol Son
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Deok-Song Kim
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Mun-Il Kang
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Sang-Ik Park
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Du Geon Moon
- Department of Urology; Korea University Guro Hospital; Seoul 152-703 Republic of Korea
| | - Dae Yul Yang
- Department of Urology; Kangdong Sacred Heart Hospital, Hallym University; Seoul 134-701 Republic of Korea
| | - Dong Soo Yu
- Department of Dermatology; College of Medicine, Catholic University of Korea; Uijongbu 480-717 Republic of Korea
| | - Jae Il Lee
- Laboratory of Veterinary Public Health, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
| | - Kyoung-Oh Cho
- Laboratory of Veterinary Pathology, College of Veterinary Medicine, Chonnam National University; Gwangju 500-757 Republic of Korea
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135
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Wang K, Luo Y. Defined Surface Immobilization of Glycosaminoglycan Molecules for Probing and Modulation of Cell–Material Interactions. Biomacromolecules 2013; 14:2373-82. [DOI: 10.1021/bm4004942] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Kai Wang
- Department of Biomedical
Engineering,
College of Engineering, Peking University, Room 206, Fang-Zheng Building, 298 Chengfu Road, Haidian District,
Beijing, China 100871
| | - Ying Luo
- Department of Biomedical
Engineering,
College of Engineering, Peking University, Room 206, Fang-Zheng Building, 298 Chengfu Road, Haidian District,
Beijing, China 100871
- National Engineering Laboratory for Regenerative and Implantable Medical Devices, 12 Yu-Yan Road, Luogang Dist, Guangzhou, China 510663
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136
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Willbold E, Reebmann M, Jeffries R, Witte F. Electrochemical removal of metallic implants from Technovit 9100 New embedded hard and soft tissues prior to histological sectioning. Histochem Cell Biol 2013; 140:585-93. [DOI: 10.1007/s00418-013-1089-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2013] [Indexed: 12/01/2022]
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137
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Leszczak V, Smith BS, Popat KC. Hemocompatibility of polymeric nanostructured surfaces. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1529-48. [PMID: 23848447 DOI: 10.1080/09205063.2013.777228] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tissue integration is an important property when inducing transplant tolerance, however, the hemocompatibility of the biomaterial surface also plays an important role in the ultimate success of the implant. Therefore, in order to induce transplant tolerance, it is critical to understand the interaction of blood components with the material surfaces. In this study, we have investigated the adsorption of key blood serum proteins, in vitro adhesion and activation of platelets and clotting kinetics of whole blood on flat polycaprolactone (PCL) surfaces, nanowire (NW) surfaces and nanofiber (NF) surfaces. Previous studies have shown that polymeric nanostructured surfaces improve cell adhesion, proliferation and viability; however it is unclear how these polymeric nanostructured surfaces interact with the blood and its components. Protein adsorption results indicate that while there were no significant differences in total albumin (ALB) adsorption on PCL, NW and NF surfaces, NW surfaces had higher total fibrinogen (FIB) and immunoglobulin-G (IgG) adsorption compared to NF and PCL surfaces. In contrast, NF surfaces had higher surface FIB and IgG adsorption compared to PCL and NW surfaces. Platelet adhesion and viability studies show more adhesion and clustering of platelets on the NF surfaces as compared to PCL and NW surfaces. Platelet activation studies reveal that NW surfaces have the highest percentage of unactivated platelets, whereas NF surfaces have the highest percentage of fully activated platelets. Whole blood clotting results indicate that NW surfaces maintain an increased amount of free hemoglobin during the clotting process compared to PCL and NF surface, indicating less clotting and slower rate of clotting on their surfaces.
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Affiliation(s)
- Victoria Leszczak
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
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138
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Rydén L, Molnar D, Esposito M, Johansson A, Suska F, Palmquist A, Thomsen P. Early inflammatory response in soft tissues induced by thin calcium phosphates. J Biomed Mater Res A 2013; 101:2712-7. [PMID: 23463679 DOI: 10.1002/jbm.a.34571] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 12/11/2012] [Accepted: 12/17/2012] [Indexed: 12/19/2022]
Abstract
The inflammatory response to titanium and hydroxyapatite (HA)-coated titanium in living tissue is controlled by a number of humoral factors, of which monocyte chemoattractant protein-1 (MCP-1) has been specifically linked to the recruitment of monocytes. These cells subsequently mature into tissue-bound macrophages. Macrophages adhering to the proteins adsorbed at the implant surface play a pivotal role in initiating the rejection or integration of the foreign material. Despite this, little is known about the initial inflammatory events that occur in soft tissues following the implantation of titanium and HA-coated titanium implants. In this study, circular discs of commercially pure titanium (c.p. Ti) with either a thin crystalline HA coating or amorphous HA coating or uncoated were implanted subcutaneously into rats. The implants were retrieved after 24 and 72 h. The lactate dehydrogenase (LD) activity, DNA content, expression of MCP-1, interleukin-10 (IL-10), tumor necrosis factor α (TNF-α), as well as monocyte and polymorphonuclear granulocyte counts in the exudate surrounding the implants were analyzed. There were significantly higher DNA and LD levels around the titanium implants at 24 h compared with HA-coated titanium. A rapid decrease in MCP-1 levels was observed for all the implants over the period of observation. No statistically significant differences were found between the two HA-coated implants. Our results suggest a difference in the early soft-tissue response to HA-coated implants when compared with titanium implants, expressed as a downregulation of inflammatory cell recruitment. This suggests that thin HA coatings are promising surfaces for soft tissue applications.
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Affiliation(s)
- L Rydén
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden
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139
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Renno ACM, van de Watering FCJ, Nejadnik MR, Crovace MC, Zanotto ED, Wolke JGC, Jansen JA, van den Beucken JJJP. Incorporation of bioactive glass in calcium phosphate cement: An evaluation. Acta Biomater 2013; 9:5728-39. [PMID: 23159565 DOI: 10.1016/j.actbio.2012.11.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 11/01/2012] [Accepted: 11/05/2012] [Indexed: 01/10/2023]
Abstract
Bioactive glasses (BGs) are known for their unique ability to bond to living bone. Consequently, the incorporation of BGs into calcium phosphate cement (CPC) was hypothesized to be a feasible approach to improve the biological performance of CPC. Previously, it has been demonstrated that BGs can successfully be introduced into CPC, with or without poly(d,l-lactic-co-glycolic) acid (PLGA) microparticles. Although an in vitro physicochemical study on the introduction of BG into CPC was encouraging, the biocompatibility and in vivo bone response to these formulations are still unknown. Therefore, the present study aimed to evaluate the in vivo performance of BG supplemented CPC, either pure or supplemented with PLGA microparticles, via both ectopic and orthotopic implantation models in rats. Pre-set scaffolds in four different formulations (1: CPC; 2: CPC/BG; 3: CPC/PLGA; and 4: CPC/PLGA/BG) were implanted subcutaneously and into femoral condyle defects of rats for 2 and 6 weeks. Upon ectopic implantation, incorporation of BG into CPC improved the soft tissue response by improving capsule and interface quality. Additionally, the incorporation of BG into CPC and CPC/PLGA showed 1.8- and 4.7-fold higher degradation and 2.2- and 1.3-fold higher bone formation in a femoral condyle defect in rats compared to pure CPC and CPC/PLGA, respectively. Consequently, these results highlight the potential of BG to be used as an additive to CPC to improve the biological performance for bone regeneration applications. Nevertheless, further confirmation is necessary regarding long-term in vivo studies, which also have to be performed under compromised wound-healing conditions.
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Affiliation(s)
- A C M Renno
- Department of Biomaterials, Radboud University Nijmegen Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
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140
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Swartzlander MD, Lynn AD, Blakney AK, Kyriakides TR, Bryant SJ. Understanding the host response to cell-laden poly(ethylene glycol)-based hydrogels. Biomaterials 2012; 34:952-64. [PMID: 23149012 DOI: 10.1016/j.biomaterials.2012.10.037] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/11/2012] [Indexed: 01/07/2023]
Abstract
Poly(ethylene glycol) (PEG)-based hydrogels are promising in situ cell carriers for tissue engineering. However, their success in vivo will in part depend upon the foreign body reaction (FBR). This study tests the hypothesis that the FBR affects cells encapsulated within PEG hydrogels, and in turn influences the severity of the FBR. Fibroblasts were encapsulated within PEG hydrogels containing RGD to support cell attachment. Macrophages were seeded on top of cell-laden hydrogels to mimic in vivo macrophage interrogation and treated with lipopolysaccharide to induce an inflammatory phenotype. The presence of activated macrophages reduced fibroblast gene expression for extracellular matrix molecules and remodeling, but stimulated VEGF and IL-1β gene expression. Fibroblasts impacted macrophage phenotype leading to increased iNOS, IL-1β and TNF-α expressions. Syngeneic cell-laden and acellular hydrogels were also implanted subcutaneously into C57bl/6 mice for 2, 7 and 28 days. Encapsulated fibroblasts secreted collagen type I during the first week, but tissue deposition and cellularity decreased by 28 days. The presence of encapsulated fibroblasts led to greater acute inflammation, but did not influence the fibrotic response. In summary, this work emphasizes the importance of the host response in tissue engineering, and the potentially deleterious impact it may have on cell-laden synthetic scaffolds.
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Affiliation(s)
- Mark D Swartzlander
- Department of Chemical & Biological Engineering, University of Colorado, Boulder, CO 80303, USA.
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141
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Tan HC, Poh CK, Cai Y, Soe MT, Wang W. Covalently grafted BMP-7 peptide to reduce macrophage/monocyte activity: An in vitro study on cobalt chromium alloy. Biotechnol Bioeng 2012; 110:969-79. [DOI: 10.1002/bit.24756] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 09/11/2012] [Accepted: 10/01/2012] [Indexed: 01/23/2023]
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142
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Daghighi S, Sjollema J, Jaspers V, de Boer L, Zaat SA, Dijkstra RJ, van Dam GM, van der Mei HC, Busscher HJ. Persistence of a bioluminescent Staphylococcus aureus strain on and around degradable and non-degradable surgical meshes in a murine model. Acta Biomater 2012; 8:3991-6. [PMID: 22824527 DOI: 10.1016/j.actbio.2012.07.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 06/18/2012] [Accepted: 07/13/2012] [Indexed: 11/25/2022]
Abstract
Biomaterials are increasingly used for the restoration of human function, but can become infected as a result of peri- or early post-operative bacterial contamination, although biomaterial-associated infections (BAIs) can also initiate at any time from hematogenous spreading of bacteria from an infection elsewhere in the body. Infecting bacteria in BAIs not only seek shelter in their own protective biofilm matrix, but also hide in surrounding tissue. This study compares staphylococcal persistence on and around a degradable and non-degradable surgical mesh through the use of longitudinal bioluminescence imaging in a murine model, including histological evaluation of surrounding tissue after sacrifice. Surgical meshes were first contaminated with bioluminescent Staphylococcus aureus Xen29 and subsequently subcutaneously implanted in mice. Bioluminescent staphylococci persisted on and around non-degradable meshes during the 28-day course of the study, whereas bioluminescence returned to control levels and bacteria disappeared from surrounding tissues once a degradable mesh had fully dissolved. Thus the application of degradable biomaterials yields major advantages with respect to the prevention of BAIs, as dissolution of the implant not only is associated with elimination of the protective biofilm mode of growth of the infecting organisms, but also allows the immune system to clear the surrounding tissue from infecting organisms.
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143
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Muhamed J, Revi D, Joseph R, Anilkumar T. Phenotypic Modulation of Cell Types around Implanted Polyethylene Terephthalate Fabric in Rabbit Muscle. Toxicol Pathol 2012; 41:497-507. [DOI: 10.1177/0192623312460922] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Whereas the nature of healing reaction in skeletal muscle following implantation of biomaterial has been extensively studied, the extent of variation in cell phenotypes is poorly known. Here, we studied the phenotypic alteration of cell types following injury in skeletal muscle of rabbits implanted with a commonly used biomaterial, polyethylene terephthalate (PET) fabric. Following implantation, histomorphological features were studied after 1, 4, and 12 weeks. Routine objective histomorphological evaluation was supplemented with histochemistry for collagen and immunohistochemistry for proliferating cell nuclear antigen (PCNA), CD34, vimentin, and alpha smooth muscle actin (α-SMA). The extent of reaction was quantified. The foreign body giant cells were found to comprise subpopulations, based on the variation in vimentin detectability or the presence of differentially capable proliferating nuclei (PCNA positive). Many rhabdomyocytes adjacent to the implant were PCNA-positive and some of them showed CD34 positivity. Often, the rhabdomyocytes very near to implanted PET fabric assumed a myofibroblast phenotype as evidenced by vimentin and/or α-SMA positivity at immunohistochemistry. Overall, the results suggested a phenotypic alteration of native cell types following implantation of PET fabric in rabbit skeletal muscle. Quantification of such cell types at the tissue–material interphase in relation to the deposition of collagen may be desirable during safety evaluation of biomaterials by histomorphology.
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Affiliation(s)
- Jaseer Muhamed
- Laboratory for Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Deepa Revi
- Laboratory for Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Roy Joseph
- Polymer Processing Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Thapasimuthu Anilkumar
- Laboratory for Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
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144
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Kido HW, Oliveira P, Parizotto NA, Crovace MC, Zanotto ED, Peitl-Filho O, Fernandes KPS, Mesquita-Ferrari RA, Ribeiro DA, M. Renno AC. Histopathological, cytotoxicity and genotoxicity evaluation of Biosilicate® glass-ceramic scaffolds. J Biomed Mater Res A 2012; 101:667-73. [DOI: 10.1002/jbm.a.34360] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 05/19/2012] [Accepted: 06/26/2012] [Indexed: 11/10/2022]
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145
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Ji W, Yang F, Seyednejad H, Chen Z, Hennink WE, Anderson JM, van den Beucken JJJP, Jansen JA. Biocompatibility and degradation characteristics of PLGA-based electrospun nanofibrous scaffolds with nanoapatite incorporation. Biomaterials 2012; 33:6604-14. [PMID: 22770568 DOI: 10.1016/j.biomaterials.2012.06.018] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 06/15/2012] [Indexed: 11/17/2022]
Abstract
The aim of current study was to evaluate the effect of nano-apatitic particles (nAp) incorporation on the degradation characteristics and biocompatibility of poly(lactide-co-glycolide) (PLGA)-based nanofibrous scaffolds. Composite PLGA/poly(ɛ-caprolactone) (PCL) blended (w/w = 3/1) polymeric electrospun scaffolds with 0-30 wt% of nAp incorporation (n0-n30) were prepared. The obtained scaffolds were firstly evaluated by morphological, physical and chemical characterization, followed by an in vitro degradation study. Further, n0 and n30 in both virgin and 3-week pre-degraded status were subcutaneously implanted in rats, either directly or in stainless steel mesh cages, to evaluate in vivo tissue response. The results showed that the incorporation of nAp yields an nAp amount-dependent buffering effect on pH-levels during degradation and delayed polymer degradation based on molecular weight analysis. Regarding biocompatibility, nAp incorporation significantly improved the tissue response during a 4-week subcutaneous implantation, showing less infiltration of inflammatory cells (monocyte/macrophages) as well as less foreign body giant cells (FBGCs) formation surrounding the scaffolds. Similar cytokine expression (gene and protein level) was observed for all groups of implanted scaffolds, although marginal differences were found for TNF-α and TGF-β at gene level as well as GRO-KC at protein level after 1 week of implantation. The results of the current study indicate that hybridization of the weak alkaline salt nAp is effective to control the in vivo adverse tissue reaction of PLGA materials, which is beneficial for optimizing final clinical application of different PLGA-based biomedical devices.
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Affiliation(s)
- Wei Ji
- Department of Biomaterials, Radboud University Nijmegen Medical Center, 309 Dentistry, PO Box 9101, 6500 HB Nijmegen, The Netherlands
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146
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Boccafoschi F, Mosca C, Cannas M. Cardiovascular biomaterials: when the inflammatory response helps to efficiently restore tissue functionality? J Tissue Eng Regen Med 2012; 8:253-67. [DOI: 10.1002/term.1526] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 01/30/2012] [Accepted: 04/03/2012] [Indexed: 01/25/2023]
Affiliation(s)
- F. Boccafoschi
- Department of Health Sciences; University of Piemonte Orientale; “A. Avogadro” 28100 Novara Italy
| | - C. Mosca
- Department of Health Sciences; University of Piemonte Orientale; “A. Avogadro” 28100 Novara Italy
| | - M. Cannas
- Department of Health Sciences; University of Piemonte Orientale; “A. Avogadro” 28100 Novara Italy
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147
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Muskovich M, Bettinger CJ. Biomaterials-based electronics: polymers and interfaces for biology and medicine. Adv Healthc Mater 2012; 1:248-66. [PMID: 23184740 PMCID: PMC3642371 DOI: 10.1002/adhm.201200071] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Indexed: 12/18/2022]
Abstract
Advanced polymeric biomaterials continue to serve as a cornerstone for new medical technologies and therapies. The vast majority of these materials, both natural and synthetic, interact with biological matter in the absence of direct electronic communication. However, biological systems have evolved to synthesize and utilize naturally-derived materials for the generation and modulation of electrical potentials, voltage gradients, and ion flows. Bioelectric phenomena can be translated into potent signaling cues for intra- and inter-cellular communication. These cues can serve as a gateway to link synthetic devices with biological systems. This progress report will provide an update on advances in the application of electronically active biomaterials for use in organic electronics and bio-interfaces. Specific focus will be granted to covering technologies where natural and synthetic biological materials serve as integral components such as thin film electronics, in vitro cell culture models, and implantable medical devices. Future perspectives and emerging challenges will also be highlighted.
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Affiliation(s)
- Meredith Muskovich
- Department of Materials Science & Engineering, 5000 Forbes Avenue, Pittsburgh, PA, 15213
| | - Christopher J. Bettinger
- Department of Biomedical Engineering, Department of Materials Science & Engineering, 5000 Forbes Avenue, Pittsburgh, PA, 15213
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148
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Ghanaati S, Barbeck M, Detsch R, Deisinger U, Hilbig U, Rausch V, Sader R, Unger RE, Ziegler G, Kirkpatrick CJ. The chemical composition of synthetic bone substitutes influences tissue reactions in vivo: histological and histomorphometrical analysis of the cellular inflammatory response to hydroxyapatite, beta-tricalcium phosphate and biphasic calcium phosphate ceramics. Biomed Mater 2012; 7:015005. [PMID: 22287541 DOI: 10.1088/1748-6041/7/1/015005] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Bone substitute material properties such as granule size, macroporosity, microporosity and shape have been shown to influence the cellular inflammatory response to a bone substitute material. Keeping these parameters constant, the present study analyzed the in vivo tissue reaction to three bone substitute materials (granules) with different chemical compositions (hydroxyapatite (HA), beta-tricalcium phosphate (TCP) and a mixture of both with a HA/TCP ratio of 60/40 wt%). Using a subcutaneous implantation model in Wistar rats for up to 30 days, tissue reactions, including the induction of multinucleated giant cells and the extent of implantation bed vascularization, were assessed using histological and histomorphometrical analyses. The results showed that the chemical composition of the bone substitute material significantly influenced the cellular response. When compared to HA, TCP attracted significantly greater multinucleated giant cell formations within the implantation bed. Furthermore, the vascularization of the implantation bed of TCP was significantly higher than that of HA implantation beds. The biphasic bone substitute group combined the properties of both groups. Within the first 15 days, high giant cell formation and vascularization rates were observed, which were comparable to the TCP-group. However, after 15 days, the tissue reaction, i.e. the extent of multinucleated giant cell formation and vascularization, was comparable to the HA-group. In conclusion, the combination of both compounds HA and TCP may be a useful combination for generating a scaffold for rapid vascularization and integration during the early time points after implantation and for setting up a relatively slow degradation. Both of these factors are necessary for successful bone tissue regeneration.
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Affiliation(s)
- Shahram Ghanaati
- Institute of Pathology, University Medical Center of the Johannes Gutenberg University Mainz, Germany.
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149
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McNally AK, Anderson JM. Foreign body-type multinucleated giant cells induced by interleukin-4 express select lymphocyte co-stimulatory molecules and are phenotypically distinct from osteoclasts and dendritic cells. Exp Mol Pathol 2011; 91:673-81. [PMID: 21798256 PMCID: PMC3220734 DOI: 10.1016/j.yexmp.2011.06.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Accepted: 06/14/2011] [Indexed: 12/28/2022]
Abstract
Foreign body-type multinucleated giant cells (FBGC), formed by macrophage fusion, are a prominent cell type on implanted biomaterials, although the roles they play at these and other sites of chronic inflammation are not understood. Why lymphocytes are present in this scenario and the effects of fusing macrophages/FBGC on subsequent lymphocyte responses are also unclear. To address the physiological significance of FBGC in this regard, we employed our in vitro system of interleukin (IL)-4-induced human monocyte-derived macrophage fusion/FBGC formation. Initially, we pursued the identities of lymphocyte co-stimulatory molecules on fusing macrophages/FBGC. In addition, we further compared the FBGC phenotype to that currently associated with osteoclasts and dendritic cells using recognized markers. Immunoblotting of cell lysates and immunochemistry of macrophages/FBGC in situ, revealed that IL-4-induced macrophages/FBGC strongly express HLA-DR, CD98, B7-2 (CD86), and B7-H1 (PD-L1), but not B7-1 (CD80) or B7-H2 (B7RP-1). Furthermore, molecules currently recognized to be expressed on osteoclasts (calcitonin receptor, tartrate-resistant acid phosphatase, RANK) or dendritic cells (CD1a, CD40, CD83, CD95/fas) are undetectable. In contrast, fusing macrophages/FBGC strongly express the macrophage markers αX integrin (CD11c), CD68, and dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN), whereas CD14 is completely down-modulated with IL-4-induced macrophage fusion. These novel data demonstrate that IL-4-induction of macrophage multinucleation/FBGC formation features the acquisition of a CD14-negative phenotypic profile which is distinguishable from that of dendritic cells and osteoclasts, yet potentially exhibits multiple capacities for lymphocyte interactions with resultant lymphocyte down-modulation.
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Affiliation(s)
- Amy K McNally
- Department of Pathology, Case Western Reserve University, Wolstein Research Building, Room 5104, 2103 Cornell Road, Cleveland, OH 44106, USA.
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150
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Zimmerli W. Implanted devices: biocompatibility, infection and tissue engineering. Semin Immunopathol 2011; 33:219-20. [PMID: 21603889 DOI: 10.1007/s00281-011-0277-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Accepted: 02/14/2011] [Indexed: 11/26/2022]
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