1
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Esmaeili J, Barati A, Charelli LE. Discussing the final size and shape of the reconstructed tissues in tissue engineering. J Artif Organs 2022:10.1007/s10047-022-01360-1. [PMID: 36125581 DOI: 10.1007/s10047-022-01360-1] [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: 04/05/2022] [Accepted: 08/15/2022] [Indexed: 11/30/2022]
Abstract
Tissue engineering (TE) has made a revolution in repairing, replacing, or regenerating tissues or organs, but it has still a long way ahead. The mechanical properties along with suitable physicochemical and biological characteristics are the initial criteria for scaffolds in TE that should be fulfilled. This research will provide another point of view toward TE challenges concerning the morphological and geometrical aspects of the reconstructed tissue and which parameters may affect it. Based on our survey, there is a high possibility that the final reconstructed tissue may be different in size and shape compared to the original design scaffold. Thereby, the 3D-printed scaffold might not guarantee an accurate tissue reconstruction. The main justification for this is the unpredicted behavior of cells, specifically in the outer layer of the scaffold. It can also be a concern when the scaffold is implanted while cell migration cannot be controlled through the in vivo signaling pathways, which might cause cancer challenges. To sum up, it is concluded that more studies are necessary to focus on the size and geometry of the final reconstructed tissue.
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Affiliation(s)
- Javad Esmaeili
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, 38156-88349, Iran.,Tissue Engineering Department, TISSUEHUB Co., Tehran, Iran
| | - Aboulfazl Barati
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, 38156-88349, Iran.
| | - Letícia Emiliano Charelli
- Nanotechnology Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering, COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
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2
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Hernandez JL, Woodrow KA. Medical Applications of Porous Biomaterials: Features of Porosity and Tissue-Specific Implications for Biocompatibility. Adv Healthc Mater 2022; 11:e2102087. [PMID: 35137550 PMCID: PMC9081257 DOI: 10.1002/adhm.202102087] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 12/17/2021] [Indexed: 12/14/2022]
Abstract
Porosity is an important material feature commonly employed in implants and tissue scaffolds. The presence of material voids permits the infiltration of cells, mechanical compliance, and outward diffusion of pharmaceutical agents. Various studies have confirmed that porosity indeed promotes favorable tissue responses, including minimal fibrous encapsulation during the foreign body reaction (FBR). However, increased biofilm formation and calcification is also described to arise due to biomaterial porosity. Additionally, the relevance of host responses like the FBR, infection, calcification, and thrombosis are dependent on tissue location and specific tissue microenvironment. In this review, the features of porous materials and the implications of porosity in the context of medical devices is discussed. Common methods to create porous materials are also discussed, as well as the parameters that are used to tune pore features. Responses toward porous biomaterials are also reviewed, including the various stages of the FBR, hemocompatibility, biofilm formation, and calcification. Finally, these host responses are considered in tissue specific locations including the subcutis, bone, cardiovascular system, brain, eye, and female reproductive tract. The effects of porosity across the various tissues of the body is highlighted and the need to consider the tissue context when engineering biomaterials is emphasized.
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Affiliation(s)
- Jamie L Hernandez
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA, 98195, USA
| | - Kim A Woodrow
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA, 98195, USA
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3
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Zhen L, Creason SA, Simonovsky FI, Snyder JM, Lindhartsen SL, Mecwan MM, Johnson BW, Himmelfarb J, Ratner BD. Precision-porous polyurethane elastomers engineered for application in pro-healing vascular grafts: Synthesis, fabrication and detailed biocompatibility assessment. Biomaterials 2021; 279:121174. [PMID: 34715636 DOI: 10.1016/j.biomaterials.2021.121174] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 08/16/2021] [Indexed: 01/22/2023]
Abstract
Unmet needs for small diameter, non-biologic vascular grafts and the less-than-ideal performance of medium diameter grafts suggest opportunities for major improvements. Biomaterials that are mechanically matched to native blood vessels, reduce the foreign body capsule (FBC) and demonstrate improved integration and healing are expected to improve graft performance. In this study, we developed biostable, crosslinked polyurethane formulations and used them to fabricate scaffolds with precision-engineered 40 μm pores. We matched the scaffold mechanical properties with those of native blood vessels by optimizing the polyurethane compositions. We hypothesized that such scaffolds promote healing and mitigate the FBC. To test our hypothesis, polyurethanes with 40 μm pores, 100 μm pores, and non-porous slabs were implanted subcutaneously in mice for 3 weeks, and then were examined histologically. Our results show that 40 μm porous scaffolds elicit the highest level of angiogenesis, cellularization, and the least severe foreign body capsule (based on a refined assessment method). This study presents the first biomaterial with tuned mechanical properties and a precision engineered porous structure optimized for healing, thus can be ideal for pro-healing vascular grafts and in situ vascular engineering. In addition, these scaffolds may have wide applications in tissue engineering, drug delivery, and implantable device.
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Affiliation(s)
- Le Zhen
- Department of Chemical Engineering, University of Washington, Seattle, WA, 98195, USA; Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Sharon A Creason
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Felix I Simonovsky
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Jessica M Snyder
- Department of Comparative Medicine, University of Washington, Seattle, WA, 98195, USA
| | - Sarah L Lindhartsen
- Histology and Imaging Core, University of Washington, Seattle, WA, 98195, USA
| | - Marvin M Mecwan
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Brian W Johnson
- Histology and Imaging Core, University of Washington, Seattle, WA, 98195, USA
| | - Jonathan Himmelfarb
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA; Department of Medicine, Division of Nephrology, University of Washington, Seattle, WA, 98195, USA; Kidney Research Institute, Seattle, WA, 98104, USA; Center for Dialysis Innovation, University of Washington, WA, 98195, USA
| | - Buddy D Ratner
- Department of Chemical Engineering, University of Washington, Seattle, WA, 98195, USA; Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA; Center for Dialysis Innovation, University of Washington, WA, 98195, USA.
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4
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Sartori M, Borsari V, Maglio M, Brogini S, Bragonzoni L, Zaffagnini S, Fini M. Skin adhesion to the percutaneous component of direct bone anchored systems: systematic review on preclinical approaches and biomaterials. Biomater Sci 2021; 9:7008-7023. [PMID: 34549759 DOI: 10.1039/d1bm00707f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Nowadays, direct bone anchored systems are an increasingly adopted approach in the therapeutic landscape for amputee patients. However, the percutaneous nature of these devices poses a major challenge to obtain a stable and lasting proper adhesion between the implant surface and the skin. A systematic review was carried out in three databases (PubMed, Scopus, Web of Science) to provide an overview of the innovative strategies tested with preclinical models (in vitro and in vivo) in the last ten years to improve the skin adhesion of direct bone anchored systems. Fifty five articles were selected after screening, also employing PECO question and inclusion criteria. A modified Cochrane RoB 2.0 tool for the in vitro studies and the SYRCLE tool for in in vivo studies were used to assess the risk of bias. The evidence collected suggests that the implementation of porous percutaneous structures could be one of the most favorable approach to improve proper skin adhesion, especially in association with bioactive coatings, as hydroxyapatite, and exploiting the field of nanostructure. Some issues still remain open as (a) the identification and characterization of the best material/coating association able to limit the shear stresses at the interface and (b) the role of keratinocyte turnover on the skin/biomaterial adhesion and integration processes.
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Affiliation(s)
- Maria Sartori
- IRCCS - Istituto Ortopedico Rizzoli, Complex Structure of Surgical Sciences and Technologies, Via di Barbiano 1/10, 40136, Bologna, Italy.
| | - Veronica Borsari
- IRCCS - Istituto Ortopedico Rizzoli, Complex Structure of Surgical Sciences and Technologies, Via di Barbiano 1/10, 40136, Bologna, Italy.
| | - Melania Maglio
- IRCCS - Istituto Ortopedico Rizzoli, Complex Structure of Surgical Sciences and Technologies, Via di Barbiano 1/10, 40136, Bologna, Italy.
| | - Silvia Brogini
- IRCCS - Istituto Ortopedico Rizzoli, Complex Structure of Surgical Sciences and Technologies, Via di Barbiano 1/10, 40136, Bologna, Italy.
| | - Laura Bragonzoni
- University of Bologna - Department for Life Quality Studies, Bologna, Italy
| | - Stefano Zaffagnini
- IRCCS - Istituto Ortopedico Rizzoli, II Orthopaedic and Traumatologic Clinic, Via G.C. Pupilli 1, 40136, Bologna, Italy
| | - Milena Fini
- IRCCS - Istituto Ortopedico Rizzoli, Complex Structure of Surgical Sciences and Technologies, Via di Barbiano 1/10, 40136, Bologna, Italy.
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5
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Dong D, Tsao C, Hung HC, Yao F, Tang C, Niu L, Ma J, MacArthur J, Sinclair A, Wu K, Jain P, Hansen MR, Ly D, Tang SGH, Luu TM, Jain P, Jiang S. High-strength and fibrous capsule-resistant zwitterionic elastomers. SCIENCE ADVANCES 2021; 7:7/1/eabc5442. [PMID: 33523839 PMCID: PMC7775767 DOI: 10.1126/sciadv.abc5442] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 11/06/2020] [Indexed: 05/20/2023]
Abstract
The high mechanical strength and long-term resistance to the fibrous capsule formation are two major challenges for implantable materials. Unfortunately, these two distinct properties do not come together and instead compromise each other. Here, we report a unique class of materials by integrating two weak zwitterionic hydrogels into an elastomer-like high-strength pure zwitterionic hydrogel via a "swelling" and "locking" mechanism. These zwitterionic-elastomeric-networked (ZEN) hydrogels are further shown to efficaciously resist the fibrous capsule formation upon implantation in mice for up to 1 year. Such materials with both high mechanical properties and long-term fibrous capsule resistance have never been achieved before. This work not only demonstrates a class of durable and fibrous capsule-resistant materials but also provides design principles for zwitterionic elastomeric hydrogels.
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Affiliation(s)
- Dianyu Dong
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
- School of Chemical Engineering and Technology, and Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Tianjin 300350, China
| | - Caroline Tsao
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Hsiang-Chieh Hung
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Fanglian Yao
- School of Chemical Engineering and Technology, and Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Tianjin 300350, China
| | - Chenjue Tang
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Liqian Niu
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Jinrong Ma
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Joel MacArthur
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Andrew Sinclair
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Kan Wu
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Priyesh Jain
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Mitchell Ryan Hansen
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Dorathy Ly
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | | | - Tammy My Luu
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Parul Jain
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA
| | - Shaoyi Jiang
- Department of Chemical Engineering, University of Washington, Seattle, WA 98185, USA.
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
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6
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Lee RMH, Bouremel Y, Eames I, Brocchini S, Khaw PT. Translating Minimally Invasive Glaucoma Surgery Devices. Clin Transl Sci 2019; 13:14-25. [PMID: 31568666 PMCID: PMC6951459 DOI: 10.1111/cts.12660] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/08/2019] [Indexed: 11/30/2022] Open
Abstract
Glaucoma is the leading cause of irreversible blindness with over 70 million people affected worldwide. The surgical management of glaucoma aims to lower intraocular pressure by increasing aqueous outflow facility. The latest manufacturing techniques have allowed for the development of a number of novel implantable devices to improve safety and outcomes of glaucoma surgery. These are collectively referred to as minimally invasive glaucoma surgery (MIGS) devices and are among the smallest devices implanted in the human body. This review discusses the design criterion and constraints as well as the user requirements for MIGS devices. We review how recent devices have attempted to meet these challenges and give our opinion as to the necessary characteristics for the development of future devices.
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Affiliation(s)
- Richard M H Lee
- Chelsea and Westminster Hospital NHS Foundation Trust, London, UK.,NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK
| | - Yann Bouremel
- NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK
| | - Ian Eames
- UCL Department of Mechanical Engineering, London, UK
| | - Steve Brocchini
- NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK.,UCL School of Pharmacy, London, UK
| | - Peng Tee Khaw
- NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK
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7
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Abdallah MN, Badran Z, Ciobanu O, Hamdan N, Tamimi F. Strategies for Optimizing the Soft Tissue Seal around Osseointegrated Implants. Adv Healthc Mater 2017; 6. [PMID: 28960892 DOI: 10.1002/adhm.201700549] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/12/2017] [Indexed: 12/20/2022]
Abstract
Percutaneous and permucosal devices such as catheters, infusion pumps, orthopedic, and dental implants are commonly used in medical treatments. However, these useful devices breach the soft tissue barrier that protects the body from the outer environment, and thus increase bacterial infections resulting in morbidity and mortality. Such associated infections can be prevented if these devices are effectively integrated with the surrounding soft tissue, and thus creating a strong seal from the surrounding environment. However, so far, there are no percutaneous/permucosal medical devices able to prevent infection by achieving strong integration at the soft tissue-device interface. This review gives an insight into the current status of research into soft tissue-implant interface and the challenges associated with these interfaces. Biological soft/hard tissue interfaces may provide insights toward engineering better soft tissue interfaces around percutaneous devices. In this review, focus is put on the history and current findings as well as recent progress of the strategies aiming to develop a strong soft tissue seal around osseointegrated implants, such as orthopedic and dental implants.
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Affiliation(s)
- Mohamed-Nur Abdallah
- Division of Biomedical Sciences; Faculty of Dentistry; McGill University; Montreal H3A 1G1 QC Canada
- Division of Orthodontics; Faculty of Dentistry; Toronto University; Toronto M5G 1G6 ON Canada
| | - Zahi Badran
- Division of Biomedical Sciences; Faculty of Dentistry; McGill University; Montreal H3A 1G1 QC Canada
- Department of Periodontology (CHU/Rmes Inserm U1229/UIC11); Faculty of Dental Surgery; University of Nantes; Nantes 44042 France
| | - Ovidiu Ciobanu
- Division of Biomedical Sciences; Faculty of Dentistry; McGill University; Montreal H3A 1G1 QC Canada
| | - Nader Hamdan
- Department of Dental Clinical Sciences; Faculty of Dentistry; Dalhousie University; Halifax B3H 4R2 NS Canada
| | - Faleh Tamimi
- Division of Biomedical Sciences; Faculty of Dentistry; McGill University; Montreal H3A 1G1 QC Canada
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8
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Shao J, Kolwijck E, Jansen JA, Yang F, Walboomers XF. Animal models for percutaneous-device-related infections: a review. Int J Antimicrob Agents 2017; 49:659-667. [DOI: 10.1016/j.ijantimicag.2017.01.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 01/12/2017] [Accepted: 01/14/2017] [Indexed: 01/05/2023]
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9
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Brown BN, Haschak MJ, Lopresti ST, Stahl EC. Effects of age-related shifts in cellular function and local microenvironment upon the innate immune response to implants. Semin Immunol 2017; 29:24-32. [PMID: 28539184 DOI: 10.1016/j.smim.2017.05.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/18/2017] [Accepted: 05/11/2017] [Indexed: 12/14/2022]
Abstract
The host macrophage response is now well recognized as a predictor of the success or failure of biomaterial implants following placement. More specifically, shifts from an "M1" pro-inflammatory towards a more "M2-like" anti-inflammatory macrophage polarization profile have been shown to result in enhanced material integration and/or tissue regeneration downstream. As a result, a number of biomaterials-based approaches to controlling macrophage polarization have been developed. However, the ability to promote such activity is predicated upon an in-depth, context-dependent understanding of the host response to biomaterials. Recent work has shown the impacts of both tissue location and tissue status (i.e. underlying pathology) upon the host innate immune response to implants, representing a departure from a focus upon implant material composition and form. Thus, the ideas of "biocompatibility," the host macrophage reaction, and ideal material requirements and modification strategies may need to be revisited on a patient, tissue, and disease basis. Immunosenescence, dysregulation of macrophage function, and delayed resolution of immune responses in aged individuals have all been demonstrated, suggesting that the host response to biomaterials in aged individuals should differ from that in younger individuals. However, despite the increasing usage of implantable medical devices in aged patients, few studies examining the effects of aging upon the host response to biomaterials and the implications of this response for long-term integration and function have been performed. The objective of the present manuscript is to review the putative effects of aging upon the host response to implanted materials and to advance the hypothesis that age-related changes in the local microenvrionement, with emphasis on the extracellular matrix, play a previously unrecognized role in determining the host response to implants.
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Affiliation(s)
- Bryan N Brown
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, PA 15219, United States; Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15260, United States; Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, University of Pittsburgh, 300 Halket Street, Pittsburgh, PA 15213, United States.
| | - Martin J Haschak
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, PA 15219, United States; Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15260, United States
| | - Samuel T Lopresti
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, PA 15219, United States; Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15260, United States
| | - Elizabeth C Stahl
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, PA 15219, United States; Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, 200 Lothrop St., Pittsburgh, PA 15261, United States
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10
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Hachim D, Wang N, Lopresti ST, Stahl EC, Umeda YU, Rege RD, Carey ST, Mani D, Brown BN. Effects of aging upon the host response to implants. J Biomed Mater Res A 2017; 105:1281-1292. [PMID: 28130823 DOI: 10.1002/jbm.a.36013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/05/2017] [Accepted: 01/23/2017] [Indexed: 01/11/2023]
Abstract
Macrophage polarization during the host response is now a well-accepted predictor of outcomes following material implantation. Immunosenescence, dysregulation of macrophage function, and delayed resolution of immune responses in aged individuals have all been demonstrated, suggesting that host responses to materials in aged individuals should differ from those in younger individuals. However, few studies examining the effects of aging upon the host response have been performed. The present work sought to elucidate the impacts of aging upon the host response to polypropylene mesh implanted into 8-week-old and 18-month-old mice. The results showed that there are significant differences in macrophage surface marker expression, migration, and polarization during the early host macrophage response and delayed resolution of the host response in 18-month-old versus 8-week-old mice. These differences could not be attributed to cell-intrinsic defects alone, suggesting that the host macrophage response to implants is likely also dictated to a significant degree by the local tissue microenvironment. These results raise important questions about the design and testing of materials and devices often intended to treat aged individuals and suggest that an improved understanding of patient- and context-dependent macrophage responses has the potential to improve outcomes in aged individuals. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 1281-1292, 2017.
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Affiliation(s)
- Daniel Hachim
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, Pennsylvania, 15219.,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania, 15260
| | - Na Wang
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, Pennsylvania, 15219
| | - Samuel T Lopresti
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, Pennsylvania, 15219.,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania, 15260
| | - Elizabeth C Stahl
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, Pennsylvania, 15219.,Department of Pathology, University of Pittsburgh School of Medicine, University of Pittsburgh, 200 Lothrop St, Pittsburgh, Pennsylvania, 15261
| | - Yuta U Umeda
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania, 15260
| | - Rahul D Rege
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania, 15260
| | - Sean T Carey
- Department of Chemical Engineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania, 15260
| | - Deepa Mani
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, Pennsylvania, 15219
| | - Bryan N Brown
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, Pennsylvania, 15219.,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, Pennsylvania, 15260.,Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, University of Pittsburgh, 300 Halket Street, Pittsburgh, Pennsylvania, 15213
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11
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Pholpabu P, Yerneni SS, Zhu C, Campbell PG, Bettinger CJ. Controlled Release of Small Molecules from Elastomers for Reducing Epidermal Downgrowth in Percutaneous Devices. ACS Biomater Sci Eng 2016; 2:1464-1470. [DOI: 10.1021/acsbiomaterials.6b00192] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Pitirat Pholpabu
- Department of Biomedical Engineering, ‡Institute for Complex
Engineered
Systems, and §Department of Materials Science
and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Saigopalakrishna S. Yerneni
- Department of Biomedical Engineering, ‡Institute for Complex
Engineered
Systems, and §Department of Materials Science
and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Congcong Zhu
- Department of Biomedical Engineering, ‡Institute for Complex
Engineered
Systems, and §Department of Materials Science
and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Phil G. Campbell
- Department of Biomedical Engineering, ‡Institute for Complex
Engineered
Systems, and §Department of Materials Science
and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Christopher J. Bettinger
- Department of Biomedical Engineering, ‡Institute for Complex
Engineered
Systems, and §Department of Materials Science
and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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12
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Stynes GD, Kiroff GK, Morrison WA, Page RS, Kirkland MA. Toward a skin-material interface with vacuum-integrated capped macroporous scaffolds. J Biomed Mater Res B Appl Biomater 2016; 105:1307-1318. [PMID: 26968747 DOI: 10.1002/jbm.b.33649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 01/25/2016] [Accepted: 02/20/2016] [Indexed: 11/11/2022]
Abstract
Avulsion, epidermal marsupialization, and infection cause failure at the skin-material interface. A robust interface would permit implantable robotics, prosthetics, and other medical devices; reconstruction of surgical defects, and long-term access to blood vessels and body cavities. Torus-shaped cap-scaffold structures were designed to work in conjunction with negative pressure to address the three causes of failure. Six wounds were made on the backs of each of four 3-month old pigs. Four unmodified (no caps) scaffolds were implanted along with 20 cap-scaffolds. Collagen type 4 was attached to 21 implants. Negative pressure then was applied. Structures were explanted and assessed histologically at day 7 and day 28. At day 28, there was close tissue apposition to scaffolds, without detectable reactions from defensive or interfering cells. Three cap-scaffolds explanted at day 28 showed likely attachment of epidermis to the cap or cap-scaffold junction, without deeper marsupialization. The combination of toric-shaped cap-scaffolds with negative pressure appears to be an intrinsically biocompatible system, enabling a robust skin-material interface. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1307-1318, 2017.
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Affiliation(s)
- Gil D Stynes
- Barwon Biomedical Research, University Hospital Geelong, Geelong, Victoria, Australia.,Department of Surgery, St Vincent's Hospital, University of Melbourne, Melbourne, Victoria, Australia.,Commonwealth Scientific and Industrial Research Organisation, Melbourne, Victoria, Australia.,Institute for Frontier Materials, Deakin University, Geelong, Victoria, Australia
| | - George K Kiroff
- Barwon Biomedical Research, University Hospital Geelong, Geelong, Victoria, Australia.,Queen Elizabeth Hospital, The University of Adelaide, Adelaide, South Australia, Australia
| | - Wayne A Morrison
- Department of Surgery, St Vincent's Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Richard S Page
- School of Medicine, Deakin University, Geelong, Victoria, Australia
| | - Mark A Kirkland
- Barwon Biomedical Research, University Hospital Geelong, Geelong, Victoria, Australia.,Institute for Frontier Materials, Deakin University, Geelong, Victoria, Australia
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13
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Galperin A, Smith K, Geisler NS, Bryers JD, Ratner BD. Precision-Porous PolyHEMA-Based Scaffold as an Antibiotic-Releasing Insert for a Scleral Bandage. ACS Biomater Sci Eng 2015; 1:593-600. [DOI: 10.1021/acsbiomaterials.5b00133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna Galperin
- Department of Bioengineering, University of Washington, 3720 15th
Avenue NE, Seattle, Washington 98195, United States
| | - Karen Smith
- Department of Bioengineering, University of Washington, 3720 15th
Avenue NE, Seattle, Washington 98195, United States
| | - Neil S. Geisler
- Department of Bioengineering, University of Washington, 3720 15th
Avenue NE, Seattle, Washington 98195, United States
| | - James D. Bryers
- Department of Bioengineering, University of Washington, 3720 15th
Avenue NE, Seattle, Washington 98195, United States
| | - Buddy D. Ratner
- Department of Bioengineering, University of Washington, 3720 15th
Avenue NE, Seattle, Washington 98195, United States
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14
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Chian KS, Leong MF, Kono K. Regenerative medicine for oesophageal reconstruction after cancer treatment. Lancet Oncol 2015; 16:e84-92. [PMID: 25638684 DOI: 10.1016/s1470-2045(14)70410-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Removal of malignant tissue in patients with oesophageal cancer and replacement with autologous grafts from the stomach and colon can lead to problems. The need to reduce stenosis and anastomotic leakage after oesophagectomy is a high priority. Developments in tissue-engineering methods and cell-sheet technology have improved scaffold materials for oesophageal repair. Despite the many successful animal studies, few tissue-engineering approaches have progressed to clinical trials. In this Review, we discuss the status of oesophagus reconstruction after surgery. In particular, we highlight two clinical trials that used decellularised constructs and epithelial cell sheets to replace excised tissues after endoscopic submucosal dissection or mucosal resection procedures. Results from the trials showed that both decellularised grafts and epithelial-cell sheets prevented stenosis. By contrast, animal studies have shown that the use of tissue-engineered constructs after oesophagectomy remains a challenge.
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Affiliation(s)
- Kerm Sin Chian
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore.
| | - Meng Fatt Leong
- Department of Cell and Tissue Engineering, Institute of Bioengineering and Nanotechnology, Singapore, Singapore
| | - Koji Kono
- Department of Surgery, National University of Singapore, Singapore, Singapore; Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore; Department of Organ Regulatory Surgery and Advanced Cancer Immunotherapy, Fukushima Medical University, Fukushima, Japan
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15
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Teng W, Long TJ, Zhang Q, Yao K, Shen TT, Ratner BD. A tough, precision-porous hydrogel scaffold: Ophthalmologic applications. Biomaterials 2014; 35:8916-26. [DOI: 10.1016/j.biomaterials.2014.07.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 07/10/2014] [Indexed: 10/25/2022]
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16
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João CFC, Vasconcelos JM, Silva JC, Borges JP. An overview of inverted colloidal crystal systems for tissue engineering. TISSUE ENGINEERING PART B-REVIEWS 2014; 20:437-54. [PMID: 24328724 DOI: 10.1089/ten.teb.2013.0402] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Scaffolding is at the heart of tissue engineering but the number of techniques available for turning biomaterials into scaffolds displaying the features required for a tissue engineering application is somewhat limited. Inverted colloidal crystals (ICCs) are inverse replicas of an ordered array of monodisperse colloidal particles, which organize themselves in packed long-range crystals. The literature on ICC systems has grown enormously in the past 20 years, driven by the need to find organized macroporous structures. Although replicating the structure of packed colloidal crystals (CCs) into solid structures has produced a wide range of advanced materials (e.g., photonic crystals, catalysts, and membranes) only in recent years have ICCs been evaluated as devices for medical/pharmaceutical and tissue engineering applications. The geometry, size, pore density, and interconnectivity are features of the scaffold that strongly affect the cell environment with consequences on cell adhesion, proliferation, and differentiation. ICC scaffolds are highly geometrically ordered structures with increased porosity and connectivity, which enhances oxygen and nutrient diffusion, providing optimum cellular development. In comparison to other types of scaffolds, ICCs have three major unique features: the isotropic three-dimensional environment, comprising highly uniform and size-controllable pores, and the presence of windows connecting adjacent pores. Thus far, this is the only technique that guarantees these features with a long-range order, between a few nanometers and thousands of micrometers. In this review, we present the current development status of ICC scaffolds for tissue engineering applications.
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Affiliation(s)
- Carlos Filipe C João
- 1 CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa , Caparica, Portugal
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17
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Wells LA, Valic MS, Lisovsky A, Sefton MV. Angiogenic Biomaterials to Promote Tissue Vascularization and Integration. Isr J Chem 2013. [DOI: 10.1002/ijch.201300053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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18
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McMahon BJ, Pfluger CA, Sun B, Ziemer KS, Burkey DD, Carrier RL. Photoinitiated chemical vapor deposition of cytocompatible poly(2-hydroxyethyl methacrylate) films. J Biomed Mater Res A 2013; 102:2375-82. [PMID: 23852714 DOI: 10.1002/jbm.a.34870] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 06/20/2013] [Accepted: 07/03/2013] [Indexed: 11/07/2022]
Abstract
Poly(2-hydroxyethyl methacrylate) (pHEMA) is a widely utilized biomaterial due to lack of toxicity and suitable mechanical properties; conformal thin pHEMA films produced via chemical vapor deposition (CVD) would thus have broad biomedical applications. Thin films of pHEMA were deposited using photoinitiated CVD (piCVD). Incorporation of ethylene glycol diacrylate (EGDA) into the pHEMA polymer film as a crosslinker, confirmed via Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, resulted in varied swelling and degradation behavior. 2-Hydroxyethyl methacrylate-only films showed significant thickness loss (up to 40%), possibly due to extraction of low-molecular-weight species or erosion, after 24 h in aqueous solution, whereas films crosslinked with EGDA (9.25-12.4%) were stable for up to 21 days. These results differ significantly from those obtained with plasma-polymerized pHEMA, which degraded steadily over a 21-day period, even with crosslinking. This suggests that the piCVD films differ structurally from those fabricated via plasma polymerization (plasma-enhanced CVD). piCVD pHEMA coatings proved to be good cell culture materials, with Caco-2 cell attachment and viability comparable to results obtained on tissue-culture polystyrene. Thus, thin film CVD pHEMA offers the advantage of enabling conformal coating of a cell culture substrate with tunable properties depending on method of preparation and incorporation of crosslinking agents.
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Affiliation(s)
- Brian J McMahon
- Department of Chemical Engineering, Northeastern University, 342 Snell Engineering Center, Boston, Massachusetts, 02115
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19
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Galperin A, Oldinski RA, Florczyk SJ, Bryers JD, Zhang M, Ratner BD. Integrated bi-layered scaffold for osteochondral tissue engineering. Adv Healthc Mater 2013; 2:872-83. [PMID: 23225568 PMCID: PMC3644393 DOI: 10.1002/adhm.201200345] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Indexed: 11/08/2022]
Abstract
Osteochondral tissue engineering poses the challenge of combining both cartilage and bone tissue engineering fundamentals. In this study, a sphere-templating technique was applied to fabricate an integrated bi-layered scaffold based on degradable poly(hydroxyethyl methacrylate) hydrogel. One layer of the integrated scaffold was designed with a single defined, monodispersed pore size of 38 μm and pore surfaces coated with hydroxyapatite particles to promote regrowth of subchondral bone while the second layer had 200 μm pores with surfaces decorated with hyaluronan for articular cartilage regeneration. Mechanical properties of the construct as well as cyto-compatibility of the scaffold and its degradation products were elucidated. To examine the potential of the biphasic scaffold for regeneration of osteochondral tissue the designated cartilage and bone layers of the integrated bi-layered scaffold were seeded with chondrocytes differentiated from human mesenchymal stem cells and primary human mesenchymal stem cells, respectively. Both types of cells were co-cultured within the scaffold in standard medium without soluble growth/differentiation factors over four weeks. The ability of the integrated bi-layered scaffold to support simultaneous matrix deposition and adequate cell growth of two distinct cell lineages in each layer during four weeks of co-culture in vitro in the absence of soluble growth factors was demonstrated.
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Affiliation(s)
| | | | | | | | - Miqin Zhang
- University of Washington, Seattle, WA 98195, USA
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