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Ornaghi HL, Neves RM, Monticeli FM, Agnol LD. Dynamic mechanical and thermogravimetric properties of synthetized polyurethanes. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04257-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Cheesbrough A, Sciscione F, Riccio F, Harley P, R'Bibo L, Ziakas G, Darbyshire A, Lieberam I, Song W. Biobased Elastomer Nanofibers Guide Light-Controlled Human-iPSC-Derived Skeletal Myofibers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110441. [PMID: 35231133 PMCID: PMC9131876 DOI: 10.1002/adma.202110441] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/25/2022] [Indexed: 05/07/2023]
Abstract
Generating skeletal muscle tissue that mimics the cellular alignment, maturation, and function of native skeletal muscle is an ongoing challenge in disease modeling and regenerative therapies. Skeletal muscle cultures require extracellular guidance and mechanical support to stabilize contractile myofibers. Existing microfabrication-based solutions are limited by complex fabrication steps, low throughput, and challenges in measuring dynamic contractile function. Here, the synthesis and characterization of a new biobased nanohybrid elastomer, which is electrospun into aligned nanofiber sheets to mimic the skeletal muscle extracellular matrix, is presented. The polymer exhibits remarkable hyperelasticity well-matched to that of native skeletal muscle (≈11-50 kPa), with ultimate strain ≈1000%, and elastic modulus ≈25 kPa. Uniaxially aligned nanofibers guide myoblast alignment, enhance sarcomere formation, and promote a ≈32% increase in myotube fusion and ≈50% increase in myofiber maturation. The elastomer nanofibers stabilize optogenetically controlled human induced pluripotent stem cell derived skeletal myofibers. When activated by blue light, the myofiber-nanofiber hybrid constructs maintain a significantly higher (>200%) contraction velocity and specific force (>280%) compared to conventional culture methods. The engineered myofibers exhibit a power density of ≈35 W m-3 . This system is a promising new skeletal muscle tissue model for applications in muscular disease modeling, drug discovery, and muscle regeneration.
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Affiliation(s)
- Aimee Cheesbrough
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Fabiola Sciscione
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
| | - Federica Riccio
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Peter Harley
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Lea R'Bibo
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Georgios Ziakas
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
| | - Arnold Darbyshire
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
| | - Ivo Lieberam
- Centre for Gene Therapy and Regenerative MedicineMRC Centre for Neurodevelopmental DisordersCentre for Developmental NeurobiologyKings College LondonLondonSE1 9RTUK
| | - Wenhui Song
- UCL Centre for Biomaterials in Surgical Reconstruction and RegenerationDepartment of Surgical BiotechnologyDivision of Surgery and Interventional ScienceUniversity College LondonLondonNW3 2PFUK
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Saganuwan SA. Biomedical Applications of Polyurethane Hydrogels, Polyurethane Aerogels and Polyurethane-Graphene Nanocomposite Materials. Cent Nerv Syst Agents Med Chem 2022; 22:79-87. [PMID: 35507789 DOI: 10.2174/1871524922666220429115124] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 01/06/2022] [Accepted: 02/05/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Increasing new emerging ill-healths have posed therapeutic challenges in modern medicine. Hence polyurethane hydrogels that comprise polyol, copolymer and extender could be prepared from diverse chemical compounds with adjuvants such as ascorbic acid, sorbitol among others. Their mechano-physicochemical properties are functions of their biological activities. Therefore there is need to assess their therapeutic potentials. METHODS literature were searched on synthesis and medical uses of polyurethane - hydrogels, polyurethane - aerogels and polyurethane - graphene nanocomposite materials, with a view to identifying their sources, synthesis, mechanical and physiochemical properties, biomedical applications, chirality, and the relevance of Lipinski's rule of five in the synthesis of oral polyurethane nanocomposite materials. RESULTS The prepared hydrogels and aerogels could be used as polymer carriers for intradermal, cutaneous and intranasal drugs. They can be fabricated and used as prosthetics. In addition the strength modulus (tensile stress-tensile strain ratio), biodegradability, biocompatibility and non-toxic effects of the polyurethane hydrogels and aerogels are the highly desirable properties. However, body and environmental temperatures may contribute to their instability, hence there is need to improve on the synthesis of aerogels and hydrogels of polyurethane that can last for many years. Alcoholism, diabetes, pyrogenic diseases, mechanical and physical forces, and physiological variability may also reduce the life span of polyurethane aerogels and hydrogels. CONCLUSION Synthesis of polyurethane hydrogel-aerogel complex that can be used in complex, rare biomedical cases is of paramount importance. These hydrogels and aerogels may be hydrophobic, hydrophilic, aerophobic-aerophilic or amphiphilic and sometimes lipophilic depending on structural components and the intended biomedical uses. Polyurethane graphene nanocomposite materials are used in the treatment of a myriad of diseases including cancer and bacterial infection.
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Affiliation(s)
- Saganuwan Alhaji Saganuwan
- Department Of Veterinary Pharmacology And Toxicology, College Of Veterinary Medicine, Federal University Of Agriculture P.M.B 2373, Makurdi, Benue State, Nigeria
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Chitrakar C, Hedrick E, Adegoke L, Ecker M. Flexible and Stretchable Bioelectronics. MATERIALS (BASEL, SWITZERLAND) 2022; 15:1664. [PMID: 35268893 PMCID: PMC8911085 DOI: 10.3390/ma15051664] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 12/30/2022]
Abstract
Medical science technology has improved tremendously over the decades with the invention of robotic surgery, gene editing, immune therapy, etc. However, scientists are now recognizing the significance of 'biological circuits' i.e., bodily innate electrical systems for the healthy functioning of the body or for any disease conditions. Therefore, the current trend in the medical field is to understand the role of these biological circuits and exploit their advantages for therapeutic purposes. Bioelectronics, devised with these aims, work by resetting, stimulating, or blocking the electrical pathways. Bioelectronics are also used to monitor the biological cues to assess the homeostasis of the body. In a way, they bridge the gap between drug-based interventions and medical devices. With this in mind, scientists are now working towards developing flexible and stretchable miniaturized bioelectronics that can easily conform to the tissue topology, are non-toxic, elicit no immune reaction, and address the issues that drugs are unable to solve. Since the bioelectronic devices that come in contact with the body or body organs need to establish an unobstructed interface with the respective site, it is crucial that those bioelectronics are not only flexible but also stretchable for constant monitoring of the biological signals. Understanding the challenges of fabricating soft stretchable devices, we review several flexible and stretchable materials used as substrate, stretchable electrical conduits and encapsulation, design modifications for stretchability, fabrication techniques, methods of signal transmission and monitoring, and the power sources for these stretchable bioelectronics. Ultimately, these bioelectronic devices can be used for wide range of applications from skin bioelectronics and biosensing devices, to neural implants for diagnostic or therapeutic purposes.
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Affiliation(s)
| | | | | | - Melanie Ecker
- Department of Biomedical Engineering, University of North Texas, Denton, TX 76203, USA; (C.C.); (E.H.); (L.A.)
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Vadkerti B, Juhász A, Lakatos C, Zsuga M, Kéki S, Nagy L. Reactivity of multi-arm polyols towards isocyanates. NEW J CHEM 2022. [DOI: 10.1039/d2nj01103d] [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]
Abstract
In this research, the kinetics of the reaction of various polymer polyol crosslinking agents with phenyl isocyanate is reported.
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Affiliation(s)
- Bence Vadkerti
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
- Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Anett Juhász
- Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
- BorsodChem Zrt., Bólyai tér 1, H-3700 Kazincbarcika, Hungary
| | - Csilla Lakatos
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Miklós Zsuga
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Sándor Kéki
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Lajos Nagy
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
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Local Failure Modes and Critical Buckling Loads of a Meta-Functional Auxetic Sandwich Core for Composite Bridge Bearing Applications. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112210844] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This paper presents a novel meta-functional auxetic unit (MFAU) cell designed to improve performance and weight ratio for structural bridge bearing applications. Numerical investigations were conducted using three-dimensional finite element models validated by experimental results. The validated models were exposed to compression and buckling actions to identify structural failure modes, with special attention placed on the global behaviours of the meta-functional auxetic (MFA) composite bridge bearing. This bearing uses an unprecedented auxetic sandwich core design consisting of multiple MFAU cells. Numerical predictions of the elastic local critical buckling loads of the MFAU cell were in excellent agreement with both the analytical and experimental results, with an observed discrepancy of less than 1%. These results demonstrate that local buckling failures of MFAU cells can potentially be incurred prior to yielding under compression due to their slenderness ratios. Surprisingly, the designed sandwich core used in the MFA composite bridge bearing model can mimic an auxetic structure with significant crashworthiness, implying that this novel core composite structure can be tailored for structural bridge bearing applications. Parametric studies were thus carried out in order to enrich our insight into the MFA composite elements. These insights, stemming from both experimental and numerical studies, enable a novel design paradigm for MFAU that can significantly enhance the structural performance of MFA composite bridge bearings in practice.
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Hydrogel Surface-Modified Polyurethane Copolymer Film with Water Permeation Resistance and Biocompatibility for Implantable Biomedical Devices. MICROMACHINES 2021; 12:mi12040447. [PMID: 33923516 PMCID: PMC8072913 DOI: 10.3390/mi12040447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 11/17/2022]
Abstract
To use implantable biomedical devices such as electrocardiograms and neurostimulators in the human body, it is necessary to package them with biocompatible materials that protect the internal electronic circuits from the body’s internal electrolytes and moisture without causing foreign body reactions. Herein, we describe a hydrogel surface-modified polyurethane copolymer film with concurrent water permeation resistance and biocompatibility properties for application to an implantable biomedical device. To achieve this, hydrophobic polyurethane copolymers comprising hydrogenated poly(ethylene-co-butylene) (HPEB) and aliphatic poly(carbonate) (PC) were synthesized and their hydrophobicity degree and mechanical properties were adjusted by controlling the copolymer composition ratio. When 10 wt% PC was introduced, the polyurethane copolymer exhibited hydrophobicity and water permeation resistance similar to those of HPEB; however, with improved mechanical properties. Subsequently, a hydrophilic poly(vinyl pyrrolidone) (PVP) hydrogel layer was formed on the surface of the polyurethane copolymer film by Fenton reaction using an initiator and crosslinking agent and the effect of the initiator and crosslinking agent immobilization time, PVP concentration and crosslinking agent concentration on the hydrogel properties were investigated. Finally, MTT assay showed that the hydrogel surface-modified polyurethane copolymer film displays excellent biocompatibility.
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A Comparative Review of Natural and Synthetic Biopolymer Composite Scaffolds. Polymers (Basel) 2021; 13:polym13071105. [PMID: 33808492 PMCID: PMC8037451 DOI: 10.3390/polym13071105] [Citation(s) in RCA: 301] [Impact Index Per Article: 100.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 12/12/2022] Open
Abstract
Tissue engineering (TE) and regenerative medicine integrate information and technology from various fields to restore/replace tissues and damaged organs for medical treatments. To achieve this, scaffolds act as delivery vectors or as cellular systems for drugs and cells; thereby, cellular material is able to colonize host cells sufficiently to meet up the requirements of regeneration and repair. This process is multi-stage and requires the development of various components to create the desired neo-tissue or organ. In several current TE strategies, biomaterials are essential components. While several polymers are established for their use as biomaterials, careful consideration of the cellular environment and interactions needed is required in selecting a polymer for a given application. Depending on this, scaffold materials can be of natural or synthetic origin, degradable or nondegradable. In this review, an overview of various natural and synthetic polymers and their possible composite scaffolds with their physicochemical properties including biocompatibility, biodegradability, morphology, mechanical strength, pore size, and porosity are discussed. The scaffolds fabrication techniques and a few commercially available biopolymers are also tabulated.
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Rahman MM. Polyurethane/Zinc Oxide (PU/ZnO) Composite-Synthesis, Protective Propertyand Application. Polymers (Basel) 2020; 12:polym12071535. [PMID: 32664589 PMCID: PMC7407999 DOI: 10.3390/polym12071535] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 07/09/2020] [Indexed: 02/07/2023] Open
Abstract
A polyurethane (PU) is a multifunctional polymer prepared by using more than two types of monomers. The unique properties of PU come from monomers, thus broadening the applicability of PU in many different sectors. The properties can be further improved by using many nanoparticles. Different metal oxides as nanoparticles are also widely used in PU materials. ZnO is a widely used inorganic metal oxide nanoparticle for improving polymer properties. In this review article, the techniques to prepare a PU/ZnO composite are reviewed; the key protective properties, such as adhesive strength and self-healing, and applications of PU/ZnO composites are also highlighted. This review also highlights the PU/ZnO composite's current challenges and future prospects, which will help to broaden the composite practical application by preparing environmentally friendly composites.
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Affiliation(s)
- Mohammad Mizanur Rahman
- Center of Research Excellence in Corrosion, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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10
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Synthesis and property of polyurethane elastomer for biomedical applications based on nonaromatic isocyanates, polyesters, and ethylene glycol. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04667-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AbstractPolyurethane (PU) elastomers were synthesized by the reaction of HDI or IPDI diisocyanates and poly(ε-caprolactone) (PCL or poly(ethylene adipate) (PA) diols and ethylene glycol as a polymer chain extender. IR, 1H, and 13C NMR spectroscopy and X-ray analysis were used for the structural analysis of the formed films. The molecular weight distribution was examined by GPC chromatography. Based on the measured contact angles, free surface energy parameters were calculated. The obtained results were analyzed for the possible use of these polyurethanes as biomaterials. The most promising in this respect was PU-3, which was synthesized from IPDI and PCL. This was due to its high molecular weight of approximately 90,000, the presence of a crystalline phase, and the relatively high hydrophobicity, with a SEP value below 25 mJ/m2. These films showed a good resistance to hydrolysis during incubation in Baxter physiological saline during 6 weeks. Both Gram-positive (Bacillus sp.) and Gram-negative (Pseudomonas sp.) types of bacterial strains were used to test the biodegradation property. Synthesized PUs are biodegradable and showed moderate or even mild cytotoxicity against human normal fibroblasts (BJ) and immortalized keratinocytes (HaCaT), estimated with direct contact assay. The most biocompatible was PU-3 film, which revealed rather mild reactivity against both cell lines, and the least was PU-2 film, synthesized from HDI and PA (severe toxicity for HaCaTs).
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Segan S, Jakobi M, Khokhani P, Klimosch S, Billing F, Schneider M, Martin D, Metzger U, Biesemeier A, Xiong X, Mukherjee A, Steuer H, Keller BM, Joos T, Schmolz M, Rothbauer U, Hartmann H, Burkhardt C, Lorenz G, Schneiderhan-Marra N, Shipp C. Systematic Investigation of Polyurethane Biomaterial Surface Roughness on Human Immune Responses in vitro. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3481549. [PMID: 32461979 PMCID: PMC7240656 DOI: 10.1155/2020/3481549] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/29/2020] [Accepted: 03/04/2020] [Indexed: 01/06/2023]
Abstract
It has been widely shown that biomaterial surface topography can modulate host immune response, but a fundamental understanding of how different topographies contribute to pro-inflammatory or anti-inflammatory responses is still lacking. To investigate the impact of surface topography on immune response, we undertook a systematic approach by analyzing immune response to eight grades of medical grade polyurethane of increasing surface roughness in three in vitro models of the human immune system. Polyurethane specimens were produced with defined roughness values by injection molding according to the VDI 3400 industrial standard. Specimens ranged from 0.1 μm to 18 μm in average roughness (Ra), which was confirmed by confocal scanning microscopy. Immunological responses were assessed with THP-1-derived macrophages, human peripheral blood mononuclear cells (PBMCs), and whole blood following culture on polyurethane specimens. As shown by the release of pro-inflammatory and anti-inflammatory cytokines in all three models, a mild immune response to polyurethane was observed, however, this was not associated with the degree of surface roughness. Likewise, the cell morphology (cell spreading, circularity, and elongation) in THP-1-derived macrophages and the expression of CD molecules in the PBMC model on T cells (HLA-DR and CD16), NK cells (HLA-DR), and monocytes (HLA-DR, CD16, CD86, and CD163) showed no influence of surface roughness. In summary, this study shows that modifying surface roughness in the micrometer range on polyurethane has no impact on the pro-inflammatory immune response. Therefore, we propose that such modifications do not affect the immunocompatibility of polyurethane, thereby supporting the notion of polyurethane as a biocompatible material.
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Affiliation(s)
- Sören Segan
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Meike Jakobi
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Paree Khokhani
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Sascha Klimosch
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
- HOT Screen GmbH, Aspenhaustraße 25, 72770 Reutlingen, Germany
| | - Florian Billing
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Markus Schneider
- University of Applied Sciences, Reutlingen, Alteburgstr. 150, 72762 Reutlingen, Germany
| | - Dagmar Martin
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Ute Metzger
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Antje Biesemeier
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
- Center for Ophthalmology, University Hospital Tübingen, Schleichstr. 12/1, 72076 Tübingen, Germany
| | - Xin Xiong
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Ashutosh Mukherjee
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Heiko Steuer
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | | | - Thomas Joos
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Manfred Schmolz
- HOT Screen GmbH, Aspenhaustraße 25, 72770 Reutlingen, Germany
| | - Ulrich Rothbauer
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
- University of Tübingen, Geschwister-Scholl-Platz, 72074 Tübingen, Germany
| | - Hanna Hartmann
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Claus Burkhardt
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Günter Lorenz
- University of Applied Sciences, Reutlingen, Alteburgstr. 150, 72762 Reutlingen, Germany
| | - Nicole Schneiderhan-Marra
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
| | - Christopher Shipp
- NMI, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770 Reutlingen, Germany
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12
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Wang H, Christiansen DE, Mehraeen S, Cheng G. Winning the fight against biofilms: the first six-month study showing no biofilm formation on zwitterionic polyurethanes. Chem Sci 2020; 11:4709-4721. [PMID: 34122926 PMCID: PMC8159170 DOI: 10.1039/c9sc06155j] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 04/13/2020] [Indexed: 12/12/2022] Open
Abstract
Biofilms have been a long-standing challenge for healthcare, water transport, and many other industries. They lead to bacterial growth and infections in animals, food products, and humans, cause premature removal of the implanted materials or devices from patients, and facilitate fouling and corrosion of metals. Despite some published and patented methods on minimizing the effects of biofilms for a short period (less than two weeks), there exists no successful means to mitigate or prevent the long-term formation of biofilms. It is even more challenging to integrate critical anti-fouling properties with other needed physical and chemical properties for a range of applications. In this study, we developed a novel approach for combining incompatible, highly polar anti-fouling groups with less polar, mechanically modifying groups into one material. A multifunctional carboxybetaine precursor was designed and introduced into polyurethane. The carboxybetaine precursors undergo rapid, self-catalyzed hydrolysis at the water/material interface and provide critical anti-fouling properties that lead to undetectable bacterial attachment and zero biofilm formation after six months of constant exposure to Pseudomonas aeruginosa and Staphylococcus epidermidis under the static condition in a nutrient-rich medium. This zwitterionic polyurethane is the first material to demonstrate both critical anti-biofilm properties and tunable mechanical properties and directly validates the unproven anti-fouling strategy and hypothesis for biofilm formation prevention. This approach of designing 'multitasking materials' will be useful for the development of next generation anti-fouling materials for a variety of applications.
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Affiliation(s)
- Huifeng Wang
- Department of Chemical Engineering, The University of Illinois at Chicago Chicago IL 60607 USA https://gancheng.people.uic.edu
| | - Daniel Edward Christiansen
- Department of Chemical Engineering, The University of Illinois at Chicago Chicago IL 60607 USA https://gancheng.people.uic.edu
| | - Shafigh Mehraeen
- Department of Chemical Engineering, The University of Illinois at Chicago Chicago IL 60607 USA https://gancheng.people.uic.edu
| | - Gang Cheng
- Department of Chemical Engineering, The University of Illinois at Chicago Chicago IL 60607 USA https://gancheng.people.uic.edu
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Peixoto C, Soares AMS, Araújo A, Olsen BD, Machado AV. Non-isocyanate urethane linkage formation using l-lysine residues as amine sources. Amino Acids 2019; 51:1323-1335. [PMID: 31399841 DOI: 10.1007/s00726-019-02770-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 08/02/2019] [Indexed: 11/29/2022]
Abstract
Bio-based polyurethane materials are broadly applied in medicine as drug delivery systems. Nevertheless, their synthesis comprises the use of petroleum-based toxic amines, isocyanates and polyols, and their biocompatibility or functionalization is limited. Therefore, the use of lysine residues as amine sources to create non-isocyanate urethane (NIU) linkages was investigated. Therefore, a five-membered biscyclic carbonate (BCC) was firstly synthetized and reacted with a protected lysine, a tripeptide and a heptapeptide to confirm the urethane linkage formation with lysine moiety and to optimize reaction conditions. Afterwards, the reactions between BCC and a model protein, elastin-like protein (ELP), and β-Lactoglobulin (BLG) obtained from whey protein, respectively, were performed. The synthesized protein materials were structural, thermally and morphologically characterized to confirm the urethane linkage formation. The results demonstrate that using both simple and more complex source of amines (lysine), urethane linkages were effectively achieved. This pioneering approach opens the possibility of using proteins to develop non-isocyanate polyurethanes (NIPUs) with tailored properties.
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Affiliation(s)
- Cláudia Peixoto
- Institute of Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Ana M S Soares
- Institute of Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal.
| | - Andreia Araújo
- Institute of Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
| | - Bradley D Olsen
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Ana V Machado
- Institute of Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal
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Sulistio A, Mansfeld FM, Reyes-Ortega F, D’Souza AM, Ng SMY, Birkett S, Blencowe A, Qiao GG, Little CB, Shu CC, Bendele AM, Valade D, Donohue AC, Quinn JF, Whittaker MR, Davis TP, Tait RJ. Intra-articular Treatment of Osteoarthritis with Diclofenac-Conjugated Polymer Reduces Inflammation and Pain. ACS APPLIED BIO MATERIALS 2019; 2:2822-2832. [DOI: 10.1021/acsabm.9b00232] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adrian Sulistio
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
| | - Friederike M. Mansfeld
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- Children’s Cancer Institute, Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Felisa Reyes-Ortega
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
| | - Asha M. D’Souza
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Sarah M. Y. Ng
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Stephen Birkett
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Anton Blencowe
- School of Pharmacy and Medical Sciences, University of South Australia, Mawson Lake, South Australia 5095, Australia
| | - Greg G. Qiao
- Department of Chemical and Biomolecular Engineering, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Christopher B. Little
- Raymond Purves Bone and Joint Research Laboratories, Kolling Institute, University of Sydney at Royal North Shore Hospital, St Leonards, New South Wales 2065, Australia
| | - Cindy C. Shu
- Raymond Purves Bone and Joint Research Laboratories, Kolling Institute, University of Sydney at Royal North Shore Hospital, St Leonards, New South Wales 2065, Australia
| | - Alison M. Bendele
- Bolder BioPATH Inc.,5541 Central Avenue, Suite 160, Boulder, Colorado 80301, United States
| | - David Valade
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Andrew C. Donohue
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - John F. Quinn
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Michael R. Whittaker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Russell J. Tait
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
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15
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Davletbaeva IM, Zaripov II, Mazilnikov AI, Davletbaev RS, Sharifullin RR, Atlaskin AA, Sazanova TS, Vorotyntsev IV. Synthesis and Study of Gas Transport Properties of Polymers Based on Macroinitiators and 2,4-Toluene Diisocyanate. MEMBRANES 2019; 9:membranes9030042. [PMID: 30897854 PMCID: PMC6468502 DOI: 10.3390/membranes9030042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 03/14/2019] [Accepted: 03/17/2019] [Indexed: 11/27/2022]
Abstract
Nowadays, block copolymers hold great promise for the design of novel membranes to be applied for the membrane gas separation. In this regard, microporous block copolymers based on a macroinitiator with an anionic nature, such as potassium-substituted block copolymers of propylene oxide and ethylene oxide (PPEG) and 2,4-toluene diisocyanate (TDI), were obtained and investigated as effective gas separation membranes. The key element of the macromolecular structure that determines the supramolecular organization of the studied polymers is the coplanar blocks of polyisocyanates with an acetal nature (O-polyisocyanate). In the present research, the influence of the content of peripheral polyoxyethylene (POE) blocks in PPEG on the supramolecular structure processes and gas transport characteristics of the obtained polymers based on PPEG and TDI was investigated. According to the study of polymers if the POE block content is 15 wt %, the polyoxypropylene segments are located in the internal cavity of voids formed by O-polyisocyanate blocks. When the POE block content is 30 wt %, the flexible chain component forms its own microphase outside the segregation zone of the rigid O-polyisocyanate blocks. The permeability for polar molecules, such as ammonia or hydrogen sulfide, significantly exceeds the permeability values obtained for non-polar molecules He, N2 and CH4. A relatively high permeability is also observed for carbon dioxide. At the same time, the content of POE blocks has a small effect on the permeability for all studied gases. The diffusion coefficient increases with an increase in the POE block content in PPEG for all studied gases.
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Affiliation(s)
- Ilsiya M Davletbaeva
- Department of Synthetic rubber, Kazan National Research Technological University, 68 K. Marx str., 420015 Kazan, Russia.
| | - Ilnaz I Zaripov
- Department for Materials Science, Welding and Industrial Safety, Kazan National Research Technical University, n.a. A.N. Tupolev, 10 K. Marx str., 420111 Kazan, Russia.
| | - Alexander I Mazilnikov
- Department of Synthetic rubber, Kazan National Research Technological University, 68 K. Marx str., 420015 Kazan, Russia.
| | - Ruslan S Davletbaev
- Department for Materials Science, Welding and Industrial Safety, Kazan National Research Technical University, n.a. A.N. Tupolev, 10 K. Marx str., 420111 Kazan, Russia.
| | - Raphael R Sharifullin
- Laboratory of Scientific and Research Center, PJSC Nizhnekamskneftekhim, 23 Sobolekovskaya str., 423574 Nizhnekamsk, Russia.
| | - Artem A Atlaskin
- Laboratory of Membrane and Catalytic Processes, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin str., 603950 Nizhny Novgorod, Russia.
| | - Tatyana S Sazanova
- Laboratory of Membrane and Catalytic Processes, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin str., 603950 Nizhny Novgorod, Russia.
| | - Ilya V Vorotyntsev
- Laboratory of Membrane and Catalytic Processes, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin str., 603950 Nizhny Novgorod, Russia.
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16
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Francolini I, Silvestro I, Di Lisio V, Martinelli A, Piozzi A. Synthesis, Characterization, and Bacterial Fouling-Resistance Properties of Polyethylene Glycol-Grafted Polyurethane Elastomers. Int J Mol Sci 2019; 20:E1001. [PMID: 30823606 PMCID: PMC6412681 DOI: 10.3390/ijms20041001] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/15/2019] [Accepted: 02/20/2019] [Indexed: 12/13/2022] Open
Abstract
Despite advances in material sciences and clinical procedures for surgical hygiene, medical device implantation still exposes patients to the risk of developing local or systemic infections. The development of efficacious antimicrobial/antifouling materials may help with addressing such an issue. In this framework, polyethylene glycol (PEG)-grafted segmented polyurethanes were synthesized, physico-chemically characterized, and evaluated with respect to their bacterial fouling-resistance properties. PEG grafting significantly altered the polymer bulk and surface properties. Specifically, the PEG-grafted polyurethanes possessed a more pronounced hard/soft phase segregated microstructure, which contributed to improving the mechanical resistance of the polymers. The better flexibility of the soft phase in the PEG-functionalized polyurethanes compared to the pristine polyurethane (PU) was presumably also responsible for the higher ability of the polymer to uptake water. Additionally, dynamic contact angle measurements evidenced phenomena of surface reorganization of the PEG-functionalized polyurethanes, presumably involving the exposition of the polar PEG chains towards water. As a consequence, Staphylococcus epidermidis initial adhesion onto the surface of the PEG-functionalized PU was essentially inhibited. That was not true for the pristine PU. Biofilm formation was also strongly reduced.
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Affiliation(s)
- Iolanda Francolini
- Department of Chemistry, Sapienza University of Rome, 00185 Rome, Italy.
| | - Ilaria Silvestro
- Department of Chemistry, Sapienza University of Rome, 00185 Rome, Italy.
| | - Valerio Di Lisio
- Department of Chemistry, Sapienza University of Rome, 00185 Rome, Italy.
| | - Andrea Martinelli
- Department of Chemistry, Sapienza University of Rome, 00185 Rome, Italy.
| | - Antonella Piozzi
- Department of Chemistry, Sapienza University of Rome, 00185 Rome, Italy.
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17
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Kilic Bektas C, Kimiz I, Sendemir A, Hasirci V, Hasirci N. A bilayer scaffold prepared from collagen and carboxymethyl cellulose for skin tissue engineering applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1764-1784. [DOI: 10.1080/09205063.2018.1498718] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Cemile Kilic Bektas
- BIOMATEN Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Department of Biological Sciences, METU, Ankara, Turkey
- Department of Biotechnology, METU, Ankara, Turkey
| | - Ilgin Kimiz
- Department of Bioengineering, Ege University, Izmir, Turkey
| | - Aylin Sendemir
- Department of Bioengineering, Ege University, Izmir, Turkey
- Department of Biomedical Technologies, Ege University, Izmir, Turkey
| | - Vasif Hasirci
- BIOMATEN Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Department of Biological Sciences, METU, Ankara, Turkey
- Department of Biotechnology, METU, Ankara, Turkey
| | - Nesrin Hasirci
- BIOMATEN Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University (METU), Ankara, Turkey
- Department of Biotechnology, METU, Ankara, Turkey
- Department of Chemistry, METU, Ankara, Turkey
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18
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Leiendecker MT, Licht CJ, Borghs J, Mooney DJ, Zimmermann M, Böker A. Physical Polyurethane Hydrogels via Charge Shielding through Acids or Salts. Macromol Rapid Commun 2018; 39:e1700711. [PMID: 29383857 DOI: 10.1002/marc.201700711] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/20/2017] [Indexed: 11/12/2022]
Abstract
Physical hydrogels with tunable stress-relaxation and excellent stress recovery are formed from anionic polyurethanes via addition of acids, monovalent salts, or divalent salts. Gel properties can be widely adjusted through pH, salt valence, salt concentration, and monomer composition. We propose and investigate a novel gelation mechanism based on a colloidal system interacting through charge repulsion and chrage shielding, allowing a broad use of the material, from acidic (pH 4-5.5) to pH-neutral hydrogels with Young's moduli ranging from 10 to 140 kPa.
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Affiliation(s)
- Mai-Thi Leiendecker
- Fraunhofer Institute for Applied Polymer Research (IAP), Geiselbergstr. 69, 14476, Potsdam-Golm, Germany.,Lehrstuhl für Polymermaterialien und Polymertechnologie, Universität Potsdam, 14476, Potsdam, Germany
| | - Christopher J Licht
- Insitute of Organic Chemistry, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Jannik Borghs
- Insitute of Organic Chemistry, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - David J Mooney
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Marc Zimmermann
- Fraunhofer Institute for Applied Polymer Research (IAP), Geiselbergstr. 69, 14476, Potsdam-Golm, Germany.,Lehrstuhl für Polymermaterialien und Polymertechnologie, Universität Potsdam, 14476, Potsdam, Germany
| | - Alexander Böker
- Fraunhofer Institute for Applied Polymer Research (IAP), Geiselbergstr. 69, 14476, Potsdam-Golm, Germany.,Lehrstuhl für Polymermaterialien und Polymertechnologie, Universität Potsdam, 14476, Potsdam, Germany
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19
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Firkowska-Boden I, Zhang X, Jandt KD. Controlling Protein Adsorption through Nanostructured Polymeric Surfaces. Adv Healthc Mater 2018; 7. [PMID: 29193909 DOI: 10.1002/adhm.201700995] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 10/09/2017] [Indexed: 12/11/2022]
Abstract
The initial host response to healthcare materials' surfaces after implantation is the adsorption of proteins from blood and interstitial fluids. This adsorbed protein layer modulates the biological/cellular responses to healthcare materials. This stresses the significance of the surface protein assembly for the biocompatibility and functionality of biomaterials and necessitates a profound fundamental understanding of the capability to control protein-surface interactions. This review, therefore, addresses this by systematically analyzing and discussing strategies to control protein adsorption on polymeric healthcare materials through the introduction of specific surface nanostructures. Relevant proteins, healthcare materials' surface properties, clinical applications of polymer healthcare materials, fabrication methods for nanostructured polymer surfaces, amorphous, semicrystalline and block copolymers are considered with a special emphasis on the topographical control of protein adsorption. The review shows that nanostructured polymer surfaces are powerful tools to control the amount, orientation, and order of adsorbed protein layers. It also shows that the understanding of the biological responses to such ordered protein adsorption is still in its infancy, yet it has immense potential for future healthcare materials. The review, which is-as far as it is known-the first one discussing protein adsorption on nanostructured polymer surfaces, concludes with highlighting important current research questions.
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Affiliation(s)
- Izabela Firkowska-Boden
- Chair of Materials Science (CMS); Otto Schott Institute of Materials Research (OSIM); Friedrich Schiller University Jena; Löbdergraben 32 07743 Jena Germany
| | - Xiaoyuan Zhang
- Chair of Materials Science (CMS); Otto Schott Institute of Materials Research (OSIM); Friedrich Schiller University Jena; Löbdergraben 32 07743 Jena Germany
| | - Klaus D. Jandt
- Chair of Materials Science (CMS); Otto Schott Institute of Materials Research (OSIM); Friedrich Schiller University Jena; Löbdergraben 32 07743 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
- Jena School for Microbial Communication (JSMC); Neugasse 23 07743 Jena Germany
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20
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Kiliç E, Yakar A, Pekel Bayramgil N. Preparation of electrospun polyurethane nanofiber mats for the release of doxorubicine. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 29:8. [PMID: 29275508 DOI: 10.1007/s10856-017-6013-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
Polyurethane (PU) and doxorubicine loaded-PU nanofiber mats were prepared by the electrospinning technique. The effect of some system and process parameters including flow rate, distance from collector, and concentration of solution on the size and morphology of nanofibers was investigated. The size, morphology and drug content of nanofiber mats were followed by scanning electron microscopy (SEM). FTIR and TGA methods were used for structural and thermal characterization, and DSC was also used for determining the form of drug within nanofiber mat. Doxorubicine release kinetics were studied in two different pHs (4.5 and 7.5) for two drug content and it was observed that there is an inverse correlation between the amounts of drug loaded and released.
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Affiliation(s)
- Esra Kiliç
- Faculty of Science, Department of Chemistry, Hacettepe University, 06800 Beytepe, Ankara, Turkey
| | - Arzu Yakar
- Department of Chemical Engineering, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey
| | - Nursel Pekel Bayramgil
- Faculty of Science, Department of Chemistry, Hacettepe University, 06800 Beytepe, Ankara, Turkey.
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21
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Zwitterionic sulfobetaine polymer-immobilized surface by simple tyrosinase-mediated grafting for enhanced antifouling property. Acta Biomater 2017; 61:169-179. [PMID: 28782724 DOI: 10.1016/j.actbio.2017.08.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 07/28/2017] [Accepted: 08/03/2017] [Indexed: 12/16/2022]
Abstract
Introducing antifouling property to biomaterial surfaces has been considered an effective method for preventing the failure of implanted devices. In order to achieve this, the immobilization of zwitterions on biomaterial surfaces has been proven to be an excellent way of improving anti-adhesive potency. In this study, poly(sulfobetaine-co-tyramine), a tyramine-conjugated sulfobetaine polymer, was synthesized and simply grafted onto the surface of polyurethane via a tyrosinase-mediated reaction. Surface characterization by water contact angle measurements, X-ray photoelectron spectroscopy and atomic force microscopy demonstrated that the zwitterionic polymer was successfully introduced onto the surface of polyurethane and remained stable for 7days. In vitro studies revealed that poly(sulfobetaine-co-tyramine)-coated surfaces dramatically reduced the adhesion of fibrinogen, platelets, fibroblasts, and S. aureus by over 90% in comparison with bare surfaces. These results proved that polyurethane surfaces grafted with poly(sulfobetaine-co-tyramine) via a tyrosinase-catalyzed reaction could be promising candidates for an implantable medical device with excellent bioinert abilities. STATEMENT OF SIGNIFICANCE Antifouling surface modification is one of the key strategy to prevent the thrombus formation or infection which occurs on the surface of biomaterial after transplantation. Although there are many methods to modify the surface have been reported, necessity of simple modification technique still exists to apply for practical applications. The purpose of this study is to modify the biomaterial's surface by simply immobilizing antifouling zwitterion polymer via enzyme tyrosinase-mediated reaction which could modify versatile substrates in mild aqueous condition within fast time period. After modification, pSBTA grafted surface becomes resistant to various biological factors including proteins, cells, and bacterias. This approach appears to be a promising method to impart antifouling property on biomaterial surfaces.
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22
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Hao H, Deng Y, Wu Y, Liu S, Lin W, Li J, Luo F, Tan H. Synthesis of biodegradable waterborne phosphatidylcholine polyurethanes for soft tissue engineering applications. Regen Biomater 2017. [DOI: 10.1093/rb/rbw046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
| | | | | | | | | | - Jiehua Li
- Correspondence address. College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China. Tel: +86 28 85460972; Fax: +86 28 85405402; E-mail: ;
| | | | - Hong Tan
- Correspondence address. College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China. Tel: +86 28 85460972; Fax: +86 28 85405402; E-mail: ;
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23
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Picca RA, Paladini F, Sportelli MC, Pollini M, Giannossa LC, Di Franco C, Panico A, Mangone A, Valentini A, Cioffi N. Combined Approach for the Development of Efficient and Safe Nanoantimicrobials: The Case of Nanosilver-Modified Polyurethane Foams. ACS Biomater Sci Eng 2016; 3:1417-1425. [DOI: 10.1021/acsbiomaterials.6b00597] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Rosaria Anna Picca
- Dipartimento
di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Federica Paladini
- Dipartimento
di Ingegneria dell’Innovazione, Università del Salento, Via per
Monteroni, 73100 Lecce, Italy
| | - Maria Chiara Sportelli
- Dipartimento
di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Mauro Pollini
- Dipartimento
di Ingegneria dell’Innovazione, Università del Salento, Via per
Monteroni, 73100 Lecce, Italy
| | - Lorena Carla Giannossa
- Dipartimento
di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Cinzia Di Franco
- CNR-IFN
- Dipartimento Interateneo di Fisica, Università degli Studi di Bari Aldo Moro, Via Amendola 173, 70126 Bari, Italy
| | - Angelica Panico
- Dipartimento
di Ingegneria dell’Innovazione, Università del Salento, Via per
Monteroni, 73100 Lecce, Italy
| | - Annarosa Mangone
- Dipartimento
di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Antonio Valentini
- Dipartimento
Interateneo di Fisica, Università degli Studi di Bari Aldo Moro, Via Amendola 173, 70126 Bari, Italy
| | - Nicola Cioffi
- Dipartimento
di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
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24
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Ternary cyclodextrin polyurethanes containing phosphate groups: Synthesis and complexation of ciprofloxacin. Carbohydr Polym 2016; 151:557-564. [DOI: 10.1016/j.carbpol.2016.05.101] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 05/26/2016] [Accepted: 05/27/2016] [Indexed: 11/22/2022]
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25
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Shahrousvand M, Mir Mohamad Sadeghi G, Salimi A. Artificial extracellular matrix for biomedical applications: biocompatible and biodegradable poly (tetramethylene ether) glycol/poly (ε-caprolactone diol)-based polyurethanes. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 27:1712-1728. [DOI: 10.1080/09205063.2016.1231436] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mohsen Shahrousvand
- Department of Polymer Engineering & Color Technology, Amirkabir University of Technology, Tehran, Iran
| | - Gity Mir Mohamad Sadeghi
- Department of Polymer Engineering & Color Technology, Amirkabir University of Technology, Tehran, Iran
| | - Ali Salimi
- Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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26
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Mi HY, Salick MR, Jing X, Crone WC, Peng XF, Turng LS. Electrospinning of unidirectionally and orthogonally aligned thermoplastic polyurethane nanofibers: fiber orientation and cell migration. J Biomed Mater Res A 2015; 103:593-603. [PMID: 24771704 PMCID: PMC4726458 DOI: 10.1002/jbm.a.35208] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 03/25/2014] [Accepted: 04/22/2014] [Indexed: 11/10/2022]
Abstract
Unidirectionally and orthogonally aligned thermoplastic polyurethane (TPU) nanofibers were electrospun using a custom-built electrospinning device. The unidirectionally aligned fibers were collected using two parallel copper plates, and the orthogonally aligned fibers were collected using two orthogonal sets of parallel copper plates with alternate negative connections. Carbon nanotubes (CNT) and polyacrylic acid (PAA) were added to modify the polymer solution. It was found that both CNT and PAA were capable of increasing solution conductivity. The TPU/PAA fiber showed the highest degree of fiber orientation with more than 90% of the fibers having an orientation angle between -10° and 10° for unidirectionally aligned fibers, and for orthogonally aligned fibers, the orientation angle of 50% fibers located between -10° and 10° and 48% fibers located between 80° and 100°. Viability assessment of 3T3 fibroblasts cultured on TPU/PAA fibers suggested that the material was cytocompatible. The cells' orientation and migration direction closely matched the fibers' orientation. The cell migration velocity and distance were both enhanced with the guidance of fibers compared with cells cultured on random fibers and common tissue culture plastic. Controlling cell migration velocity and directionality may provide ways to influence differentiation and gene expression and systems that would allow further exploration of wound repair and metastatic cell behavior.
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Affiliation(s)
- Hao-Yang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, 510640, China; Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, Wisconsin, 53715; Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, 53706
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27
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Jing X, Mi HY, Salick MR, Cordie TM, Peng XF, Turng LS. Electrospinning thermoplastic polyurethane/graphene oxide scaffolds for small diameter vascular graft applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 49:40-50. [PMID: 25686925 DOI: 10.1016/j.msec.2014.12.060] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 11/26/2014] [Accepted: 12/17/2014] [Indexed: 01/31/2023]
Abstract
Fabrication of small diameter vascular grafts plays an important role in vascular tissue engineering. In this study, thermoplastic polyurethane (TPU)/graphene oxide (GO) scaffolds were fabricated via electrospinning at different GO contents as potential candidates for small diameter vascular grafts. In terms of mechanical and surface properties, the tensile strength, Young's modulus, and hydrophilicity of the scaffolds increased with an increase of GO content while plasma treatment dramatically improved the scaffold hydrophilicity. Mouse fibroblast (3T3) and human umbilical vein endothelial cells (HUVECs) were cultured on the scaffolds separately to study their biocompatibility and potential to be used as vascular grafts. It was found that cell viability for both types of cells, fibroblast proliferation, and HUVEC attachment were the highest at a 0.5wt.% GO loading whereas oxygen plasma treatment also enhanced HUVEC viability and attachment significantly. In addition, the suture retention strength and burst pressure of tubular TPU/GO scaffolds containing 0.5wt.% GO were found to meet the requirements of human blood vessels, and endothelial cells were able to attach to the inner surface of the tubular scaffolds. Platelet adhesion tests using mice blood indicated that vascular scaffolds containing 0.5% GO had low platelet adhesion and activation. Therefore, the electrospun TPU/GO tubular scaffolds have the potential to be used in vascular tissue engineering.
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Affiliation(s)
- Xin Jing
- National Engineering Research Center of Novel Equipment for Polymer Processing, The Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology, Guangzhou, China; Department of Mechanical Engineering, University of Wisconsin-Madison, WI, USA; Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA
| | - Hao-Yang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing, The Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology, Guangzhou, China
| | - Max R Salick
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA; Department of Engineering Physics, University of Wisconsin-Madison, WI, USA
| | - Travis M Cordie
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA; Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Xiang-Fang Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing, The Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology, Guangzhou, China.
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin-Madison, WI, USA; Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA.
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Huang Y, Shaw MA, Mullins ES, Kirley TL, Ayres N. Synthesis and anticoagulant activity of polyureas containing sulfated carbohydrates. Biomacromolecules 2014; 15:4455-66. [PMID: 25329742 PMCID: PMC4261991 DOI: 10.1021/bm501245v] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
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Polyurea-based synthetic glycopolymers
containing sulfated glucose,
mannose, glucosamine, or lactose as pendant groups have been synthesized
by step-growth polymerization of hexamethylene diisocyanate and corresponding
secondary diamines. The obtained polymers were characterized by gel
permeation chromatography, nuclear magnetic resonance spectroscopy,
and Fourier transform infrared spectroscopy. The nonsulfated polymers
showed similar results to the commercially available biomaterial polyurethane
TECOFLEX in a platelet adhesion assay. The average degree of sulfation
after reaction with SO3 was calculated from elemental analysis
and found to be between three and four −OSO3 groups
per saccharide. The blood-compatibility of the synthetic polymers
was measured using activated partial thromboplastin time, prothrombin
time, thrombin time, anti-IIa, and anti-Xa assays. Activated partial
thromboplastin time, prothrombin time, and thrombin time results indicated
that the mannose and lactose based polymers had the highest anticoagulant
activities among all the sulfated polymers. The mechanism of action
of the polymers appears to be mediated via an anti-IIa pathway rather
than an anti-Xa pathway.
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Affiliation(s)
- Yongshun Huang
- Department of Chemistry and ‡Materials Science and Engineering Program, The University of Cincinnati , Cincinnati, Ohio 45221, United States
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Ahmed M, Punshon G, Darbyshire A, Seifalian AM. Effects of sterilization treatments on bulk and surface properties of nanocomposite biomaterials. J Biomed Mater Res B Appl Biomater 2014; 101:1182-90. [PMID: 24039066 PMCID: PMC4228764 DOI: 10.1002/jbm.b.32928] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/23/2013] [Accepted: 02/11/2013] [Indexed: 12/02/2022]
Abstract
With the continuous and expanding use of implantable biomaterials in a clinical setting, this study aims to elucidate the influence of sterilization techniques on the material surface and bulk properties of two polyurethane nanocomposite biomaterials. Both solid samples and porous membranes of nondegradable polyhedral oligomeric silsesquioxane poly(carbonate-urea) urethane (POSS-PCU) and a biodegradable poly(caprolactone-urea) urethane (POSS-PCL) were examined. Sterilization techniques included conventional steam sterilization (autoclaving), gamma irradiation, and disinfection via incubating with ethanol (EtOH) for 10 min or 24 h. After treatment, the samples were examined using gel permeation chromatography (GPC), attenuated total reflectance Fourier transform infrared spectroscopy, and tensiometry. Cytotoxicity was evaluated through the culture of endothelial progenitor cells and the efficacy of sterilization method was determined by incubating each sample in tryptone soya broth and fluid thioglycollate medium for cultivation of microorganisms. Although EtOH did not affect the material properties in any form, the samples were found to be nonsterile with microbial growth detected on each of the samples. Gamma irradiation was not only effective in sterilizing both POSS-PCU and POSS-PCL but also led to minor material degradation and displayed a cytotoxic effect on the cultured cells. Autoclaving was found to be the optimal sterilization technique for both solid and porous membranes of the nondegradable POSS-PCU samples as it was successful in sterilizing the samples, displayed no cytotoxic side effects and did not degrade the material. However, the biodegradable POSS-PCL was not able to withstand the harsh environment during autoclaving, resulting in it losing all structural integrity.
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Affiliation(s)
- Maqsood Ahmed
- Centre for Nanotechnology, Biomaterials & Tissue Engineering, Division of Surgery & Interventional Science, University College London, London, UK; Centre of Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX)), London, UK
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30
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Silver nanowire/thermoplastic polyurethane elastomer nanocomposites: Thermal, mechanical, and dielectric properties. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.matdes.2013.11.029] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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31
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Mi HY, Salick MR, Jing X, Jacques BR, Crone WC, Peng XF, Turng LS. Characterization of thermoplastic polyurethane/polylactic acid (TPU/PLA) tissue engineering scaffolds fabricated by microcellular injection molding. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4767-76. [PMID: 24094186 PMCID: PMC4554542 DOI: 10.1016/j.msec.2013.07.037] [Citation(s) in RCA: 196] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 06/17/2013] [Accepted: 07/25/2013] [Indexed: 11/19/2022]
Abstract
Polylactic acid (PLA) and thermoplastic polyurethane (TPU) are two kinds of biocompatible and biodegradable polymers that can be used in biomedical applications. PLA has rigid mechanical properties while TPU possesses flexible mechanical properties. Blended TPU/PLA tissue engineering scaffolds at different ratios for tunable properties were fabricated via twin screw extrusion and microcellular injection molding techniques for the first time. Multiple test methods were used to characterize these materials. Fourier transform infrared spectroscopy (FTIR) confirmed the existence of the two components in the blends; differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) confirmed the immiscibility between the TPU and PLA. Scanning electron microscopy (SEM) images verified that, at the composition ratios studied, PLA was dispersed as spheres or islands inside the TPU matrix and that this phase morphology further influenced the scaffold's microstructure and surface roughness. The blends exhibited a large range of mechanical properties that covered several human tissue requirements. 3T3 fibroblast cell culture showed that the scaffolds supported cell proliferation and migration properly. Most importantly, this study demonstrated the feasibility of mass producing biocompatible PLA/TPU scaffolds with tunable microstructures, surface roughnesses, and mechanical properties that have the potential to be used as artificial scaffolds in multiple tissue engineering applications.
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Affiliation(s)
- Hao-Yang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Department of Mechanical Engineering, University of Wisconsin–Madison, WI, USA
| | - Max R. Salick
- Department of Engineering Physics, University of Wisconsin–Madison, WI, USA
| | - Xin Jing
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Department of Mechanical Engineering, University of Wisconsin–Madison, WI, USA
| | | | - Wendy C. Crone
- Department of Engineering Physics, University of Wisconsin–Madison, WI, USA
| | - Xiang-Fang Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin–Madison, WI, USA
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32
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Güney A, Hasirci N. Properties and phase segregation of crosslinked PCL-based polyurethanes. J Appl Polym Sci 2013. [DOI: 10.1002/app.39758] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aysun Güney
- Department of Chemistry, Faculty of Arts and Sciences; Middle East Technical University; Ankara 06800 Turkey
- Graduate Department of Polymer Science and Technology; Middle East Technical University; Ankara 06800 Turkey
- BIOMATEN-Center of Excellence in Biomaterials and Tissue Engineering; Middle East Technical University; Ankara 06800 Turkey
| | - Nesrin Hasirci
- Department of Chemistry, Faculty of Arts and Sciences; Middle East Technical University; Ankara 06800 Turkey
- Graduate Department of Polymer Science and Technology; Middle East Technical University; Ankara 06800 Turkey
- BIOMATEN-Center of Excellence in Biomaterials and Tissue Engineering; Middle East Technical University; Ankara 06800 Turkey
- Graduate Department of Biotechnology; Middle East Technical University; Ankara 06800 Turkey
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33
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Mi HY, Jing X, Peng J, Turng LS, Peng XF. Influence and prediction of processing parameters on the properties of microcellular injection molded thermoplastic polyurethane based on an orthogonal array test. J CELL PLAST 2013. [DOI: 10.1177/0021955x13488399] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Thermoplastic polyurethane is a commonly used polymer in our daily lives. Microcellular injection molding (a.k.a. MuCell) is an emerging method capable of mass-producing thermoplastic polyurethane foams with tunable microstructures and properties. This study investigated the effects of four main processing parameters—namely, plasticizing temperature, carbon dioxide (CO2) content, injection volume, and injection speed—on microcellular injection molded thermoplastic polyurethane ASTM tensile test bars. Property variables of interest included the cell diameter, cell density, skin layer thickness, and Young’s modulus. Influence sequences of parameters on each variable were obtained via the orthogonal array test method. It was found that the CO2 content primarily affected the cell diameter and cell density, whereas the temperature mainly influenced the skin layer thickness and Young’s modulus. Surface fitting of each dependent variable was done by combining its two most influential parameters from the experiment data. The value of each property variable within the processing window could then be predicted from the fitted surface. In addition, microcellular injection molding of thermoplastic polyurethane was simulated by a commercial software package, and the simulated results confirmed the reliability of the cell diameter prediction.
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Affiliation(s)
- Hao-Yang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, USA
| | - Xin Jing
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, USA
| | - Jun Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, USA
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, USA
| | - Xiang-Fang Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
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34
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Ahmed M, Punshon G, Darbyshire A, Seifalian AM. Effects of sterilization treatments on bulk and surface properties of nanocomposite biomaterials. J Biomed Mater Res B Appl Biomater 2013:n/a-n/a. [PMID: 23696156 DOI: 10.1002/jbm.32928] [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: 11/27/2012] [Revised: 01/23/2013] [Accepted: 02/11/2013] [Indexed: 11/08/2022]
Abstract
With the continuous and expanding use of implantable biomaterials in a clinical setting, this study aims to elucidate the influence of sterilization techniques on the material surface and bulk properties of two polyurethane nanocomposite biomaterials. Both solid samples and porous membranes of nondegradable polyhedral oligomeric silsesquioxane poly(carbonate-urea) urethane (POSS-PCU) and a biodegradable poly(caprolactone-urea) urethane (POSS-PCL) were examined. Sterilization techniques included conventional steam sterilization (autoclaving), gamma irradiation, and disinfection via incubating with ethanol (EtOH) for 10 min or 24 h. After treatment, the samples were examined using gel permeation chromatography (GPC), attenuated total reflectance Fourier transform infrared spectroscopy, and tensiometry. Cytotoxicity was evaluated through the culture of endothelial progenitor cells and the efficacy of sterilization method was determined by incubating each sample in tryptone soya broth and fluid thioglycollate medium for cultivation of microorganisms. Although EtOH did not affect the material properties in any form, the samples were found to be nonsterile with microbial growth detected on each of the samples. Gamma irradiation was not only effective in sterilizing both POSS-PCU and POSS-PCL but also led to minor material degradation and displayed a cytotoxic effect on the cultured cells. Autoclaving was found to be the optimal sterilization technique for both solid and porous membranes of the nondegradable POSS-PCU samples as it was successful in sterilizing the samples, displayed no cytotoxic side effects and did not degrade the material. However, the biodegradable POSS-PCL was not able to withstand the harsh environment during autoclaving, resulting in it losing all structural integrity. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2013.
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Affiliation(s)
- Maqsood Ahmed
- Centre for Nanotechnology, Biomaterials & Tissue Engineering, Division of Surgery & Interventional Science, University College London, London, UK
- Centre of Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX)), London, UK
| | - Geoffrey Punshon
- Centre for Nanotechnology, Biomaterials & Tissue Engineering, Division of Surgery & Interventional Science, University College London, London, UK
| | - Arnold Darbyshire
- Centre for Nanotechnology, Biomaterials & Tissue Engineering, Division of Surgery & Interventional Science, University College London, London, UK
| | - Alexander M Seifalian
- Centre for Nanotechnology, Biomaterials & Tissue Engineering, Division of Surgery & Interventional Science, University College London, London, UK
- Royal Free Hampstead NHS Trust Hospital, London, UK
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35
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36
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Alibeik S, Sheardown H, Rizkalla AS, Mequanint K. Protein adsorption and platelet adhesion onto ion-containing polyurethanes. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 18:1195-210. [DOI: 10.1163/156856207781554055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Sara Alibeik
- a Biomedical Engineering Graduate Program, University of Western Ontario, London, ON, Canada N6A 5B9
| | - Heather Sheardown
- b Department of Chemical Engineering, McMaster University, 1280 Main St. W., Hamilton, ON, Canada L8S 4L7; Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Amin S. Rizkalla
- c Biomedical Engineering Graduate Program, University of Western Ontario, London, ON, Canada N6A 5B9; Department of Chemical and Biochemical Engineering, University of Western Ontario, London, ON, Canada N6A 5B9; Division of Biomaterials Science, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON, Canada N6A 5C1
| | - Kibret Mequanint
- d Biomedical Engineering Graduate Program, University of Western Ontario, London, ON, Canada N6A 5B9; Department of Chemical and Biochemical Engineering, University of Western Ontario, London, ON, Canada N6A 5B9
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37
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Gurkan UA, Tasoglu S, Kavaz D, Demirel MC, Demirci U. Emerging technologies for assembly of microscale hydrogels. Adv Healthc Mater 2012; 1:149-158. [PMID: 23184717 PMCID: PMC3774531 DOI: 10.1002/adhm.201200011] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 02/08/2012] [Indexed: 01/30/2023]
Abstract
Assembly of cell encapsulating building blocks (i.e., microscale hydrogels) has significant applications in areas including regenerative medicine, tissue engineering, and cell-based in vitro assays for pharmaceutical research and drug discovery. Inspired by the repeating functional units observed in native tissues and biological systems (e.g., the lobule in liver, the nephron in kidney), assembly technologies aim to generate complex tissue structures by organizing microscale building blocks. Novel assembly technologies enable fabrication of engineered tissue constructs with controlled properties including tunable microarchitectural and predefined compositional features. Recent advances in micro- and nano-scale technologies have enabled engineering of microgel based three dimensional (3D) constructs. There is a need for high-throughput and scalable methods to assemble microscale units with a complex 3D micro-architecture. Emerging assembly methods include novel technologies based on microfluidics, acoustic and magnetic fields, nanotextured surfaces, and surface tension. In this review, we survey emerging microscale hydrogel assembly methods offering rapid, scalable microgel assembly in 3D, and provide future perspectives and discuss potential applications.
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Affiliation(s)
- Umut Atakan Gurkan
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
| | - Savas Tasoglu
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
| | - Doga Kavaz
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
| | - Melik C Demirel
- Materials Research Institute Pennsylvania State University University Park, PA 16802, USA
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
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38
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Unsal E, Yalcin B, Yilgor I, Yilgor E, Cakmak M. Real time mechano-optical study on deformation behavior of PTMO/CHDI-based polyetherurethanes under uniaxial extension. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.07.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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39
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Lehle K, Stock M, Schmid T, Schopka S, Straub RH, Schmid C. Cell-type specific evaluation of biocompatibility of commercially available polyurethanes. J Biomed Mater Res B Appl Biomater 2008; 90:312-8. [DOI: 10.1002/jbm.b.31287] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Kamışoğlu K, Aksoy EA, Akata B, Hasirci N, Baç N. Preparation and characterization of antibacterial zeolite-polyurethane composites. J Appl Polym Sci 2008. [DOI: 10.1002/app.28838] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Aksoy EA, Hasirci V, Hasirci N, Motta A, Fedel M, Migliaresi C. Plasma Protein Adsorption and Platelet Adhesion on Heparin-Immobilized Polyurethane Films. J BIOACT COMPAT POL 2008. [DOI: 10.1177/0883911508097422] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Polyurethane surfaces were modified by covalent immobilization of different molecular weight heparins (fractionated Mw ~3000 Da, and unfractionated Mw ~17,000—19,000 Da) and examined by ESCA, AFM, and contact angle goniometer. The effect of these different surface-immobilized heparins on blood protein adsorption and on platelet adhesion, were examined after incubating the samples with platelet-poor and platelet-rich plasma. Protein adsorption kinetics was studied by electrophoresis and the platelets adhered on the surfaces were examined by SEM after incubation. The two heparin types clearly showed different behavior with respect to protein adsorption, especially in the early stages of blood plasma interaction. After a 5-min incubation in plasma, low molecular weight heparin-immobilized polyurethanes (PU-LMWH) showed three times less protein adsorption compared to unfractionated heparin-immobilized polyurethanes (PU-UFH). The total amount of adhered protein became more similar as the incubation time was extended. The morphology of adhered platelets on material surfaces demonstrated differences: PU-UFH had clusters with some pseudopodia extensions, while PU-LMWH surfaces had round-shaped platelets with little clustering. For contact times >15 min, the amount of adsorbed proteins and adhered platelets on the heparinized PU surfaces decreased.
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Affiliation(s)
- Eda Ayse Aksoy
- Graduate Department of Polymer Science and Technology Middle East Technical University, 06531 Ankara, Turkey
| | - Vasif Hasirci
- Graduate Department of Polymer Science and Technology Middle East Technical University, 06531 Ankara, Turkey, , BIOMAT, Department of Biological Sciences Middle East Technical University, 06531 Ankara, Turkey, Graduate Department of Biomedical Engineering Middle East Technical University, 06531 Ankara, Turkey
| | - Nesrin Hasirci
- Graduate Department of Polymer Science and Technology Middle East Technical University, 06531 Ankara, Turkey, Graduate Department of Biomedical Engineering Middle East Technical University, 06531 Ankara, Turkey, Department of Chemistry Middle East Technical University, 06531 Ankara, Turkey
| | - Antonella Motta
- Department of Materials Engineering and Industrial Technologies and INSTM Research Unit, University of Trento, 38050 Trento, Italy
| | - Mariangela Fedel
- Department of Materials Engineering and Industrial Technologies and INSTM Research Unit, University of Trento, 38050 Trento, Italy
| | - Claudio Migliaresi
- Department of Materials Engineering and Industrial Technologies and INSTM Research Unit, University of Trento, 38050 Trento, Italy
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42
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Aksoy AE, Hasirci V, Hasirci N. Surface Modification of Polyurethanes with Covalent Immobilization of Heparin. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/masy.200850918] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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43
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Hasirci N, Aksoy EA. Synthesis and Modifications of Polyurethanes for Biomedical Purposes. HIGH PERFORM POLYM 2008. [DOI: 10.1177/0954008307081203] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Polyurethanes are known as a class of polymers with very high ‘hemocompatible‘ properties. In this study polyurethanes were prepared in various compositions and in medical purity without using any solvent, catalyst or additives. For the synthesis of polyurethanes, toluene diisocynate, diphenylmethane diisocynate or hexamethylene diisocynate were used as diisocyanate compounds and polypropylene-ethylene glycol or polypropylene glycol were used as polyol compounds. The surfaces were modified with plasma glow-discharge by using various gas atmospheres and by applying different powers. Some samples were also modified by heparin immobilization to increase the blood compatibility. Chemical structure, mechanical strength, thermal behavior, oxygen permeability, water contact angle values, as well as protein and cell attachment capabilities of the prepared and modified polyurethanes were examined as possible candidates for biomedical applications. Plasma altered the chemistry of the surface, increased hydrophilic character, and caused a decrease in protein adsorption as the applied power was increased. On the other hand, an optimum power value which caused maximum attachment for Vero cells was observed. In-vitro experiments carried out with blood cells, plasma modification caused an increase on cell adhesion while further heparin immobilization resulted with a significant decrease.
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Affiliation(s)
- Nesrin Hasirci
- Chemistry Department and Polymer Science and Technology Department, Faculty of Arts and Sciences, Middle East Technical University, Ankara 06531 Turkey
| | - E. Ayse Aksoy
- Polymer Science and Technology Department and Central Laboratory, Middle East Technical University, Ankara 06531 Turkey
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44
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Aksoy EA, Akata B, Bac N, Hasirci N. Preparation and characterization of zeolite beta–polyurethane composite membranes. J Appl Polym Sci 2007. [DOI: 10.1002/app.25976] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Yilgor I, Yilgor E, Guler IG, Ward TC, Wilkes GL. FTIR investigation of the influence of diisocyanate symmetry on the morphology development in model segmented polyurethanes. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.02.027] [Citation(s) in RCA: 214] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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