1
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Amiri S, Vatanpour V, He T. Antifouling thin-film nanocomposite NF membrane with polyvinyl alcohol-sodium alginate-graphene oxide nanocomposite hydrogel coated layer for As(III) removal. CHEMOSPHERE 2023; 322:138159. [PMID: 36812992 DOI: 10.1016/j.chemosphere.2023.138159] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Removal of As(III) from the polluted waters is a challenge. It should be oxidized to As(V) for increasing its rejection by RO membranes. However, in this research, As (III) is directly removed by a high permeable and antifouling membrane prepared through the surface coating and in-situ crosslinking procedure of polyvinyl alcohol (PVA) and sodium alginate (SA) as coating materials containing graphene oxide as a hydrophilic additive on a polysulfone support with glutaraldehyde (GA) chemical crosslinking agent. The properties of the prepared membranes were evaluated through contact angle, zeta potential, ATR-FTIR, SEM, and AFM. The addition of GO in the polymeric networks of SA and PVA hydrogel coating layers led to a better hydrophilicity and a smoother surface and a higher negative surface charge resulted in improvment of permeability and rejection of membranes. Among the prepared hydrogel-coated modified membranes, SA-GO/PSf indicated the highest pure water permeability (15.8 L m-2 h-1 bar-1) and BSA permeability (9.57 L m-2 h-1 bar-1), respectively. The best desalination performance (NaCl, MgSO4, and Na2SO4 rejections of 60.0%, 74.5%, and 92.0%, respectively) and As(III) removal (88.4%) along with satisfactory stability and reusability in cyclic continuous filtration was reported for PVA-SA-GO membrane. In addition, the PVA-SA-GO membrane indicated improved fouling resistance toward BSA foulant with the lowest flux decline of 7%.
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Affiliation(s)
- Saba Amiri
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911, Tehran, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911, Tehran, Iran; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
| | - Tao He
- Laboratory for Membrane Materials and Separation Technologies, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China
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2
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Grumezescu AM, Stoica AE, Dima-Bălcescu MȘ, Chircov C, Gharbia S, Baltă C, Roșu M, Herman H, Holban AM, Ficai A, Vasile BS, Andronescu E, Chifiriuc MC, Hermenean A. Electrospun Polyethylene Terephthalate Nanofibers Loaded with Silver Nanoparticles: Novel Approach in Anti-Infective Therapy. J Clin Med 2019; 8:E1039. [PMID: 31315266 PMCID: PMC6679131 DOI: 10.3390/jcm8071039] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/04/2019] [Accepted: 07/07/2019] [Indexed: 12/29/2022] Open
Abstract
Polyethylene terephthalate (PET) is a major pollutant polymer, due to its wide use in food packaging and fiber production industries worldwide. Currently, there is great interest for recycling the huge amount of PET-based materials, derived especially from the food and textile industries. In this study, we applied the electrospinning technique to obtain nanostructured fibrillary membranes based on PET materials. Subsequently, the recycled PET networks were decorated with silver nanoparticles through the chemical reduction method for antimicrobial applications. After the characterization of the materials in terms of crystallinity, chemical bonding, and morphology, the effect against Gram-positive and Gram-negative bacteria, as well as fungal strains, was investigated. Furthermore, in vitro and in vivo biocompatibility tests were performed in order to open up potential biomedical applications, such as wound dressings or implant coatings. Silver-decorated fibers showed lower cytotoxicity and inflammatory effects and increased antibiofilm activity, thus highlighting the potential of these systems for antimicrobial purposes.
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Affiliation(s)
- Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Academy of Romanian Scientists, 050094 Bucharest, Romania
- ICUB, Research Institute of Bucharest University, University of Bucharest, 030018 Bucharest, Romania
| | - Alexandra Elena Stoica
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Faculty of Engineering in Foreign Languages, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | | | - Cristina Chircov
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Faculty of Engineering in Foreign Languages, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Sami Gharbia
- Institute of Life Sciences, Vasile Goldis Western University of Arad, 310414 Arad, Romania
| | - Cornel Baltă
- Institute of Life Sciences, Vasile Goldis Western University of Arad, 310414 Arad, Romania
| | - Marcel Roșu
- Institute of Life Sciences, Vasile Goldis Western University of Arad, 310414 Arad, Romania
| | - Hildegard Herman
- Institute of Life Sciences, Vasile Goldis Western University of Arad, 310414 Arad, Romania
| | - Alina Maria Holban
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050107 Bucharest, Romania
| | - Anton Ficai
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Bogdan Stefan Vasile
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Ecaterina Andronescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania.
| | - Mariana Carmen Chifiriuc
- ICUB, Research Institute of Bucharest University, University of Bucharest, 030018 Bucharest, Romania
| | - Anca Hermenean
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Faculty of Medicine, Vasile Goldis Western University of Arad, 310045 Arad, Romania
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3
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Zheng H, Li S, Gao M, Ren Y, Zheng G, Xie H, Yu W, Wang X, Ma X. An improved model for exploring the effect of physicochemical properties of alginate-based microcapsules on their fibrosis formation in vivo. RSC Adv 2016. [DOI: 10.1039/c6ra19294g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An effectivein vitromodel established forexploring the effect ofthephysicochemical properties of alginate-based microcapsules on their fibrosis formation.
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Affiliation(s)
- Huizhen Zheng
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Shen Li
- Department of Endocrinology and Metabolism
- Dalian Municipal Central Hospital Affiliated of Dalian Medical University
- Dalian 116033
- P. R. China
| | - Meng Gao
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Ying Ren
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Guoshuang Zheng
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Hongguo Xie
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Weiting Yu
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Xiuli Wang
- Department of Histology and Embryology
- College of Basic Medical Science
- Dalian Medical University
- Dalian
- P. R. China
| | - Xiaojun Ma
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
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4
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Singh B, Garg T, Goyal AK, Rath G. Recent advancements in the cardiovascular drug carriers. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:216-25. [PMID: 25046615 DOI: 10.3109/21691401.2014.937868] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cardiovascular disease is the disease that affects the cardiovascular system, vascular diseases of the brain and kidney, and peripheral arterial disease. Despite of all advances in pharmacological and clinical treatment, heart failure is a leading cause of morbidness and mortality worldwide. Many new therapeutic advance strategies, including cell transplantation, gene delivery or therapy, and cytokines or other small molecules, have been research to treat heart failure. The main aim of this review article is to focus on nano carriers advancement and addressing the problems associated with old and modern therapeutics such as nonspecific effects and poor stability.
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Affiliation(s)
- Baljeet Singh
- a Department of Pharmaceutics , ISF College of Pharmacy , Moga , Punjab , India
| | - Tarun Garg
- a Department of Pharmaceutics , ISF College of Pharmacy , Moga , Punjab , India
| | - Amit K Goyal
- a Department of Pharmaceutics , ISF College of Pharmacy , Moga , Punjab , India
| | - Goutam Rath
- a Department of Pharmaceutics , ISF College of Pharmacy , Moga , Punjab , India
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5
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Abstract
The design of new technologies for treatment of human disorders is a complex and difficult task. The aim of this article is to explore state of art discussion of various techniques and materials involve in cell encapsulations. Encapsulation of cells within semi-permeable polymer shells or beads is a potentially powerful tool, and has long been explored as a promising approach for the treatment of several human diseases such as lysosomal storage disease (LSD), neurological disorders, Parkinsons disease, dwarfism, hemophilia, cancer and diabetes using immune-isolation gene therapy.
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6
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Qi M, Mørch Y, Lacík I, Formo K, Marchese E, Wang Y, Danielson KK, Kinzer K, Wang S, Barbaro B, Kolláriková G, Chorvát D, Hunkeler D, Skjåk-Braek G, Oberholzer J, Strand BL. Survival of human islets in microbeads containing high guluronic acid alginate crosslinked with Ca2+ and Ba2+. Xenotransplantation 2013. [PMID: 23198731 DOI: 10.1111/xen.12009] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND The main hurdles to the widespread use of islet transplantation for the treatment of type 1 diabetes continue to be the insufficient number of appropriate donors and the need for immunosuppression. Microencapsulation has been proposed as a means to protect transplanted islets from the host's immune system. METHODS This study investigated the function of human pancreatic islets encapsulated in Ca(2+) /Ba(2+) -alginate microbeads intraperitoneally transplanted in diabetic Balb/c mice. RESULTS All mice transplanted with encapsulated human islets (n = 29), at a quantity of 3000 islet equivalent (IEQ), achieved normoglycemia 1 day after transplantation and retained normoglycemia for extended periods of time (mean graft survival 134 ± 17 days). In comparison, diabetic Balb/c mice transplanted with an equal amount of non-encapsulated human islets rejected the islets within 2 to 7 days after transplantation (n = 5). Microbeads retrieved after 232 days (n = 3) were found with little to no fibrotic overgrowth and contained viable insulin-positive islets. Immunofluorescent staining on the retrieved microbeads showed F4/80-positive macrophages and alpha smooth muscle actin-positive fibroblasts but no CD3-positive T lymphocytes. CONCLUSIONS The Ca(2+) /Ba(2+) -alginate microbeads can protect human islets from xenogeneic rejection in immunocompetent mice without immunosuppression. However, grafts ultimately failed likely secondary to a macrophage-mediated foreign body reaction.
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Affiliation(s)
- Meirigeng Qi
- Department of Transplant/Surgery, University of Illinois at Chicago, Chicago, IL 60612, USA
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7
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Acarregui A, Pedraz JL, Blanco FJ, Hernández RM, Orive G. Hydrogel-Based Scaffolds for Enclosing Encapsulated Therapeutic Cells. Biomacromolecules 2013; 14:322-30. [DOI: 10.1021/bm301690a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Argia Acarregui
- NanoBioCel Group,
Laboratory
of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Álava,
01006, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Álava, 01006, Spain
| | - Jose Luis Pedraz
- NanoBioCel Group,
Laboratory
of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Álava,
01006, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Álava, 01006, Spain
| | - Francisco Javier Blanco
- CIBER-BBN-Bioscaff Cartílago, INIBIC-Hospital Universitario A Coruña, A Coruña,
15006, Spain
| | - Rosa María Hernández
- NanoBioCel Group,
Laboratory
of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Álava,
01006, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Álava, 01006, Spain
| | - Gorka Orive
- NanoBioCel Group,
Laboratory
of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Álava,
01006, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Álava, 01006, Spain
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8
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Kochanowski A, Hoene A, Patrzyk M, Walschus U, Finke B, Luthringer B, Feyerabend F, Willumeit R, Lucke S, Schlosser M. Examination of the inflammatory response following implantation of titanium plates coated with phospholipids in rats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1015-1026. [PMID: 21455678 DOI: 10.1007/s10856-011-4287-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 03/10/2011] [Indexed: 05/30/2023]
Abstract
Implantation of biomaterials like titanium (Ti) causes inflammatory reactions possibly affecting implant functionality. Surface modifications could improve biocompatibility and functionality of implants. Biomembrane-derived phospholipids might be useful as implant coating due to their biomimetic properties. In vitro studies demonstrated beneficial effects for 2-oleoyl-1-palmitoyl-sn-glycero-3-phosphoethanolamin (POPE) as coating regarding interactions with cells and bacteria. Therefore, this in vivo study aimed at examining local inflammatory reactions after implantation of POPE-coated Ti plates. Ti implants with POPE attached non-covalently or covalent via octadecylphosphonic acid (OPA), with OPA alone and uncoated controls were simultaneously implanted intramuscularly in rats for 7, 14 and 56 days. The peri-implant tissue was quantitatively analyzed by immunohistochemistry for total macrophages, tissue macrophages, T cells, antigen-presenting cells and proliferating cells. Overall, both POPE-coated series were comparable to the controls. Furthermore, no differences were found between POPE coating on a covalently linked OPA monolayer and POPE coating dried from solution. Together with earlier in vitro results, this demonstrates the potential of phospholipids for implant surface modification.
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Affiliation(s)
- Alexandra Kochanowski
- Department of Medical Biochemistry and Molecular Biology, Research Group of Predictive Diagnostics, Ernst Moritz Arndt University of Greifswald, Greifswalder Str 11c, 17495 Karlsburg, Germany
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9
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Guillame-Gentil O, Semenov O, Roca AS, Groth T, Zahn R, Vörös J, Zenobi-Wong M. Engineering the extracellular environment: Strategies for building 2D and 3D cellular structures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:5443-62. [PMID: 20842659 DOI: 10.1002/adma.201001747] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Indexed: 05/22/2023]
Abstract
Cell fate is regulated by extracellular environmental signals. Receptor specific interaction of the cell with proteins, glycans, soluble factors as well as neighboring cells can steer cells towards proliferation, differentiation, apoptosis or migration. In this review, approaches to build cellular structures by engineering aspects of the extracellular environment are described. These methods include non-specific modifications to control the wettability and stiffness of surfaces using self-assembled monolayers (SAMs) and polyelectrolyte multilayers (PEMs) as well as methods where the temporal activation and spatial distribution of adhesion ligands is controlled. Building on these techniques, construction of two-dimensional cell sheets using temperature sensitive polymers or electrochemical dissolution is described together with current applications of these grafts in the clinical arena. Finally, methods to pattern cells in three-dimensions as well as to functionalize the 3D environment with biologic motifs take us one step closer to being able to engineer multicellular tissues and organs.
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10
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Boudou T, Crouzier T, Ren K, Blin G, Picart C. Multiple functionalities of polyelectrolyte multilayer films: new biomedical applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:441-67. [PMID: 20217734 DOI: 10.1002/adma.200901327] [Citation(s) in RCA: 511] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The design of advanced functional materials with nanometer- and micrometer-scale control over their properties is of considerable interest for both fundamental and applied studies because of the many potential applications for these materials in the fields of biomedical materials, tissue engineering, and regenerative medicine. The layer-by-layer deposition technique introduced in the early 1990s by Decher, Moehwald, and Lvov is a versatile technique, which has attracted an increasing number of researchers in recent years due to its wide range of advantages for biomedical applications: ease of preparation under "mild" conditions compatible with physiological media, capability of incorporating bioactive molecules, extra-cellular matrix components and biopolymers in the films, tunable mechanical properties, and spatio-temporal control over film organization. The last few years have seen a significant increase in reports exploring the possibilities offered by diffusing molecules into films to control their internal structures or design "reservoirs," as well as control their mechanical properties. Such properties, associated with the chemical properties of films, are particularly important for designing biomedical devices that contain bioactive molecules. In this review, we highlight recent work on designing and controlling film properties at the nanometer and micrometer scales with a view to developing new biomaterial coatings, tissue engineered constructs that could mimic in vivo cellular microenvironments, and stem cell "niches."
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Affiliation(s)
- Thomas Boudou
- Grenoble-INP, LMGP-MINATEC, CNRS UMR 5628 3, Parvis Louis Néel, 38016 Grenoble, France
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11
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Sallach RE, Cui W, Balderrama F, Martinez AW, Wen J, Haller CA, Taylor JV, Wright ER, Long RC, Chaikof EL. Long-term biostability of self-assembling protein polymers in the absence of covalent crosslinking. Biomaterials 2009; 31:779-91. [PMID: 19854505 DOI: 10.1016/j.biomaterials.2009.09.082] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Accepted: 09/21/2009] [Indexed: 11/29/2022]
Abstract
Unless chemically crosslinked, matrix proteins, such as collagen or silk, display a limited lifetime in vivo with significant degradation observed over a period of weeks. Likewise, amphiphilic peptides, lipopeptides, or glycolipids that self-assemble through hydrophobic interactions to form thin films, fiber networks, or vesicles do not demonstrate in vivo biostability beyond a few days. We report herein that a self-assembling, recombinant elastin-mimetic triblock copolymer elicited minimal inflammatory response and displayed robust in vivo stability for periods exceeding 1 year, in the absence of either chemical or ionic crosslinking. Specifically, neither a significant inflammatory response nor calcification was observed upon implantation of test materials into the peritoneal cavity or subcutaneous space of a mouse model. Moreover, serial quantitative magnetic resonance imaging, evaluation of pre- and post-explant ultrastructure by cryo-high resolution scanning electron microscopy, and an examination of implant mechanical responses revealed substantial preservation of form, material architecture, and biomechanical properties, providing convincing evidence of a non-chemically or ionically crosslinked protein polymer system that exhibits long-term stability in vivo.
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Affiliation(s)
- Rory E Sallach
- Department of Surgery, Emory University, Atlanta, GA 30332, USA
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12
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Volodkin DV, Delcea M, Möhwald H, Skirtach AG. Remote near-IR light activation of a hyaluronic acid/poly(l-lysine) multilayered film and film-entrapped microcapsules. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1705-1710. [PMID: 20355786 DOI: 10.1021/am900269c] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Spontaneous embedding of gold nanoparticle (NP) aggregates or polyelectrolyte microcapsules modified with NPs in biocompatible hyaluronic acid/poly(l-lysine) films is reported. The NPs were adsorbed in the aggregated state to induce near-IR light absorption. The films functionalized with gold NPs become active in response to a "biologically friendly" near-IR laser at a power of about 20 mW. The activation is characterized by a localized temperature increase in the film, allowing conversion of light energy to heat into confined volumes. Microcapsules adsorbed onto the film can release its cargo under stimulation with near-IR light because of localized permeability changes in their walls. This work is aimed at layer-by-layer film-based biomedical coatings and active surfaces with light-sensitive features wherein metal NPs and microcapsules are used as active centers or carriers with remote control of functionalities.
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Affiliation(s)
- D V Volodkin
- Max-Planck Institute of Colloids and Interfaces, Research Campus Golm, Potsdam D-14424, Germany.
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13
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Tarantal AF, Lee CCI, Itkin-Ansari P. Real-time bioluminescence imaging of macroencapsulated fibroblasts reveals allograft protection in rhesus monkeys (Macaca mulatta). Transplantation 2009; 88:38-41. [PMID: 19584678 DOI: 10.1097/tp.0b013e3181a9ee6c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Encapsulation of cells has the potential to eliminate the need for immunosuppression for cellular transplantation. Recently, the TheraCyte device was shown to provide long-term immunoprotection of murine islets in a mouse model of diabetes. In this report, translational studies were undertaken using skin fibroblasts from an unrelated rhesus monkey donor that were transduced with an HIV-1-derived lentiviral vector expressing firefly luciferase permitting the use of bioluminescence imaging (BLI) to monitor cell survival over time and in a noninvasive manner. METHODS Encapsulated cells were transplanted subcutaneously (n=2), or cells were injected without encapsulation (n=1) and outcomes compared. BLI was performed to monitor cell survival. RESULTS The BLI signal from the encapsulated cells remained robust postinsertion and in one animal persisted for up to 1 year. In contrast, the control animal that received unencapsulated cells exhibited a complete loss of cell signal within 14 days. CONCLUSIONS These data demonstrate that TheraCyte encapsulation of allogeneic cells provides robust immune protection in transplanted rhesus monkeys.
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Affiliation(s)
- Alice F Tarantal
- Center of Excellence in Translational Human Stem Cell Research, California National Primate Research Center, Davis, CA 95616-8542, USA.
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14
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15
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Wilson JT, Chaikof EL. Thrombosis and inflammation in intraportal islet transplantation: a review of pathophysiology and emerging therapeutics. J Diabetes Sci Technol 2008; 2:746-59. [PMID: 19885257 PMCID: PMC2769789 DOI: 10.1177/193229680800200502] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
With the inception of the Edmonton Protocol, intraportal islet transplantation (IPIT) has re-emerged as a promising cell-based therapy for type 1 diabetes. However, current clinical islet transplantation remains limited, in part, by the need to transplant islets from 2-4 donor organs, often through several separate infusions, to reverse diabetes in a single patient. Results from clinical islet transplantation and experimental animal models now indicate that the majority of transplanted islets are destroyed in the immediate post-transplant period, a process largely facilitated by deleterious inflammatory responses triggered by islet-derived procoagulant and proinflammatory mediators. Herein, mechanisms that underlie the pathophysiology of thrombosis and inflammation in IPIT are reviewed, and emerging approaches to improve islet engraftment through attenuation of inflammatory responses are discussed.
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Affiliation(s)
- John T. Wilson
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Elliot L. Chaikof
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia
- Department of Surgery, Emory University School of Medicine, Atlanta, Georgia
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16
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Murua A, Portero A, Orive G, Hernández RM, de Castro M, Pedraz JL. Cell microencapsulation technology: towards clinical application. J Control Release 2008; 132:76-83. [PMID: 18789985 DOI: 10.1016/j.jconrel.2008.08.010] [Citation(s) in RCA: 268] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Accepted: 08/06/2008] [Indexed: 12/12/2022]
Abstract
The pharmacokinetic properties of a drug can be significantly improved by the delivery process. Scientists have understood that developing suitable drug delivery systems that release the therapeutically active molecule at the level and dose it is needed and during the optimal time represents a major advance in the field. Cell microencapsulation is an alternative approach for the sustained delivery of therapeutic agents. This technology is based on the immobilization of different types of cells within a polymeric matrix surrounded by a semipermeable membrane for the long-term release of therapeutics. As a result, encapsulated cells are isolated from the host immune system while allowing exchange of nutrients and waste and release of the therapeutic agents. The versatility of this approach has stimulated its use in the treatment of numerous medical diseases including diabetes, cancer, central nervous system diseases and endocrinological disorders among others. The aim of this review article is to give an overview on the current state of the art of the use of cell encapsulation technology as a controlled drug delivery system. The most important advantages of this type of "living" drug release strategy are highlighted, but also its limitations pointed out, and the major challenges to be addressed in the forthcoming years are described.
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Affiliation(s)
- Ainhoa Murua
- Faculty of Pharmacy, Laboratory of Pharmacy and Pharmaceutical Technology, University of the Basque Country, Vitoria-Gasteiz, Spain
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17
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Mironov V, Kasyanov V, Markwald RR. Nanotechnology in vascular tissue engineering: from nanoscaffolding towards rapid vessel biofabrication. Trends Biotechnol 2008; 26:338-44. [DOI: 10.1016/j.tibtech.2008.03.001] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Revised: 03/06/2008] [Accepted: 03/13/2008] [Indexed: 11/30/2022]
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Wilson JT, Chaikof EL. Challenges and emerging technologies in the immunoisolation of cells and tissues. Adv Drug Deliv Rev 2008; 60:124-45. [PMID: 18022728 DOI: 10.1016/j.addr.2007.08.034] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Accepted: 08/13/2007] [Indexed: 12/22/2022]
Abstract
Protection of transplanted cells from the host immune system using immunoisolation technology will be important in realizing the full potential of cell-based therapeutics. Microencapsulation of cells and cell aggregates has been the most widely explored immunoisolation strategy, but widespread clinical application of this technology has been limited, in part, by inadequate transport of nutrients, deleterious innate inflammatory responses, and immune recognition of encapsulated cells via indirect antigen presentation pathways. To reduce mass transport limitations and decrease void volume, recent efforts have focused on developing conformal coatings of micron and submicron scale on individual cells or cell aggregates. Additionally, anti-inflammatory and immunomodulatory capabilities are being integrated into immunoisolation devices to generate bioactive barriers that locally modulate host responses to encapsulated cells. Continued exploration of emerging paradigms governed by the inherent challenges associated with immunoisolation will be critical to actualizing the clinical potential of cell-based therapeutics.
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