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Yan Y, Wei L, Shao J, Qiu X, Zhang X, Cui X, Huang J, Ge S. A Near-Infrared Photothermal-Responsive Underwater Adhesive with Tough Adhesion and Antibacterial Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2310870. [PMID: 38453669 DOI: 10.1002/smll.202310870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/24/2024] [Indexed: 03/09/2024]
Abstract
Developing tunable underwater adhesives that possess tough adhesion in service and easy detachment when required remains challenging. Herein, a strategy is proposed to design a near infrared (NIR) photothermal-responsive underwater adhesive by incorporating MXene (Ti3 C2 Tx )-based nanoparticles within isocyanate-modified polydimethylsiloxane (PDMS) polymer chains. The developed adhesive exhibits long-term and tough adhesion with an underwater adhesion strength reaching 5.478 MPa. Such strong adhesion is mainly attributed to the covalent bonds and hydrogen bonds at the adhesive-substrate interface. By making use of the photothermal-response of MXene-based nanoparticles and the thermal response of PDMS-based chains, the adhesive possesses photothermal-responsive performance, exhibiting sharply diminished adhesion under NIR irradiation. Such NIR-triggered tunable adhesion allows for easy and active detachment of the adhesive when needed. Moreover, the underwater adhesive exhibits photothermal antibacterial property, making it highly desirable for underwater applications. This work enhances the understanding of photothermal-responsive underwater adhesion, enabling the design of tunable underwater adhesives for biomedical and engineering applications.
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Affiliation(s)
- Yonggan Yan
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan, Shandong, 250012, China
| | - Luxing Wei
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong, 250061, China
| | - Jinlong Shao
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaoyong Qiu
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Xiaolai Zhang
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Xin Cui
- Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing, 100071, China
| | - Jun Huang
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong, 250061, China
| | - Shaohua Ge
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Shandong University, Jinan, Shandong, 250012, China
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2
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Low energy irradiation induced effects on the surface characteristics of polydimethylsiloxane polymeric films. Macromol Res 2023. [DOI: 10.1007/s13233-023-00118-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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3
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Yastremsky EV, Patsaev TD, Mikhutkin AA, Sharikov RV, Kamyshinsky RA, Lukanina K, Sharikova NA, Grigoriev TE, Vasiliev AL. Surface Modification of Biomedical Scaffolds by Plasma Treatment. CRYSTALLOGR REP+ 2022. [DOI: 10.1134/s1063774522030233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Bindu M, Ananthapadmanabhan U. Functional modification of silicone rubber through nano‐hydroxylapatite embedding. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Mavila Bindu
- Polymer Science and Technology Research Laboratory, Department of Chemistry National Institute of Technology Calicut India
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5
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Chen Y, Zhang S, Cui Q, Ni J, Wang X, Cheng X, Alem H, Tebon P, Xu C, Guo C, Nasiri R, Moreddu R, Yetisen AK, Ahadian S, Ashammakhi N, Emaminejad S, Jucaud V, Dokmeci MR, Khademhosseini A. Microengineered poly(HEMA) hydrogels for wearable contact lens biosensing. LAB ON A CHIP 2020; 20:4205-4214. [PMID: 33048069 DOI: 10.1039/d0lc00446d] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Microchannels in hydrogels play an essential role in enabling a smart contact lens. However, microchannels have rarely been created in commercial hydrogel contact lenses due to their sensitivity to conventional microfabrication techniques. Here, we report the fabrication of microchannels in poly(2-hydroxyethyl methacrylate) (poly(HEMA)) hydrogels that are used in commercial contact lenses with a three-dimensional (3D) printed mold. We investigated the corresponding capillary flow behaviors in these microchannels. We observed different capillary flow regimes in these microchannels, depending on their hydration level. In particular, we found that a peristaltic pressure could reinstate flow in a dehydrated channel, indicating that the motion of eye-blinking may help tears flow in a microchannel-containing contact lens. Colorimetric pH and electrochemical Na+ sensing capabilities were demonstrated in these microchannels. This work paves the way for the development of microengineered poly(HEMA) hydrogels for various biomedical applications such as eye-care and wearable biosensing.
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Affiliation(s)
- Yihang Chen
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Materials Science and Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Shiming Zhang
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA. and Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA
| | - Qingyu Cui
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Jiahua Ni
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA.
| | - Xiaochen Wang
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA.
| | - Xuanbing Cheng
- Department of Materials Science and Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Halima Alem
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA. and Institut Jean Lamour, Université de Lorraine-CNRS, 54000 Nancy, France and Institut Universitaire de France, France
| | - Peyton Tebon
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA.
| | - Chun Xu
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA.
| | - Changliang Guo
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Rohollah Nasiri
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA. and Department of Mechanical Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Rosalia Moreddu
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK and Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Ali K Yetisen
- Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Samad Ahadian
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA.
| | - Nureddin Ashammakhi
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA. and Department of Radiology, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Sam Emaminejad
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA. and Department of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Vadim Jucaud
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA
| | - Mehmet R Dokmeci
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA and Department of Radiology, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Ali Khademhosseini
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA and California NanoSystems Institute, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA. and Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA and Department of Radiology, University of California-Los Angeles, Los Angeles, CA 90095, USA and Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
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6
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Wang L, Erişen DE, Yang K, Zhang B, Guan H, Chen S. Anticoagulation and antibacterial functional coating on vascular implant interventional medical catheter. J Biomed Mater Res B Appl Biomater 2020; 108:2868-2877. [PMID: 32420689 DOI: 10.1002/jbm.b.34618] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/30/2020] [Accepted: 04/13/2020] [Indexed: 01/12/2023]
Abstract
Vascular implant interventional medical catheter will contact with blood firstly after implantation. The anticoagulation and antibacterial functions of this device will determine the success or failure. Copper (Cu) has been verified to possess multi-biofunctions, but it was challenging to add the Cu metal to most materials. Take advantage of its functionality; Cu has been grafted on the material surface to improve the anticoagulation function and accelerate endothelialization. In this study, a Cu-bearing chitosan coating was prepared on the catheter to endow the anticoagulation and anti-infection functions. Besides, properties characterization and functional evaluation of the coated medical catheter were investigated. Dynamic blood clotting and platelet adhesion tests were carried out to evaluate the anticoagulation property. Besides this, the antibacterial test was used to estimate the anti-infection function. The surface energy and Cu ions release from the coating were detected and calculated by contact angles and immersion tests, respectively. The results of attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) revealed that Cu ions were grafted in the chitosan coating. Thermogravimetric analysis (TA) result showed the concentration of Cu ions in the coating. The results of dynamic blood clotting, platelet adhesion, and antibacterial tests revealed that Cu grafted in chitosan would improve the blood compatibility and anti-infection property. The surface properties and Cu ions release behavior of Cu-bearing coating revealed the reasons for multi-biofunctions. This study indicated that the Cu-bearing chitosan coating could endow the vascular implant interventional device anticoagulation and anti-infection functions, which has excellent potential for clinical application.
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Affiliation(s)
- Lirong Wang
- College of Chemistry, Liaoning University, Shenyang, China
| | - Deniz E Erişen
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.,University of Science and Technology of China, Hefei, China
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Bingchun Zhang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Hongyu Guan
- College of Chemistry, Liaoning University, Shenyang, China
| | - Shanshan Chen
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
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7
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Mateescu M, Knopf S, Mermet F, Lavalle P, Vonna L. Role of Trapped Air in the Attachment of Staphylococcus aureus on Superhydrophobic Silicone Elastomer Surfaces Textured by a Femtosecond Laser. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1103-1112. [PMID: 31887046 DOI: 10.1021/acs.langmuir.9b03170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Surface texturing is an easy way to control wettability as well as bacterial adhesion. Air trapped in the surface texture of an immersed sample was often proposed as the origin of the low adhesion of bacteria to surfaces showing superhydrophobic properties. In this work, we identified two sets of femtosecond laser processing parameters that led to extreme superhydrophobic textures on a silicone elastomer but showed opposite behavior against Staphylococcus aureus (S. aureus, ATCC 25923) over a short incubation times (6 h). The main difference from most of the previous studies was that the air trapping was not evaluated from the extrapolation of the results of the classical sessile drop technique but from the drop rebound and Wilhelmy plate method. Additionally, all wetting tests were performed with bacteria culture medium and at 37 °C in the case of the Wilhelmy plate method. Following this approach, we were able to study the formation of the liquid/silicone interface and the associated air trapping for immersed samples that is, by far, most representative of the cell culture conditions than those associated with the sessile drop technique. Finally, the conversion of these superhydrophobic coatings into superhydrophilic ones revealed that air trapping is not a necessary condition to avoid Staphylococcus aureus retention on one of these two textured surfaces at short incubation times.
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Affiliation(s)
- Mihaela Mateescu
- Institut National de la Santé et de la Recherche Médicale , Unité Mixte de Recherche-S 1121 , Biomatériaux et Bioingénierie , 67000 Strasbourg , France
| | - Stephan Knopf
- Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488 , 68057 Mulhouse , France
| | - Frédéric Mermet
- IREPA-LASER , Boulevard Gonthier d'Andernach , Parc d'Innovation , 67400 Illkirch-Graffenstaden , France
| | - Philippe Lavalle
- Institut National de la Santé et de la Recherche Médicale , Unité Mixte de Recherche-S 1121 , Biomatériaux et Bioingénierie , 67000 Strasbourg , France
| | - Laurent Vonna
- Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488 , 68057 Mulhouse , France
- Université de Strasbourg , 67081 Strasbourg , France
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8
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Polysiloxanes as polymer matrices in biomedical engineering: their interesting properties as the reason for the use in medical sciences. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02869-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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9
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Weidenbacher L, Müller E, Guex AG, Zündel M, Schweizer P, Marina V, Adlhart C, Vejsadová L, Pauer R, Spiecker E, Maniura-Weber K, Ferguson SJ, Rossi RM, Rottmar M, Fortunato G. In Vitro Endothelialization of Surface-Integrated Nanofiber Networks for Stretchable Blood Interfaces. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5740-5751. [PMID: 30668107 DOI: 10.1021/acsami.8b18121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Despite major technological advances within the field of cardiovascular engineering, the risk of thromboembolic events on artificial surfaces in contact with blood remains a major challenge and limits the functionality of ventricular assist devices (VADs) during mid- or long-term therapy. Here, a biomimetic blood-material interface is created via a nanofiber-based approach that promotes the endothelialization capability of elastic silicone surfaces for next-generation VADs under elevated hemodynamic loads. A blend fiber membrane made of elastic polyurethane and low-thrombogenic poly(vinylidene fluoride- co-hexafluoropropylene) was partially embedded into the surface of silicone films. These blend membranes resist fundamental irreversible deformation of the internal structure and are stably attached to the surface, while also exhibiting enhanced antithrombotic properties when compared to bare silicone. The composite material supports the formation of a stable monolayer of endothelial cells within a pulsatile flow bioreactor, resembling the physiological in vivo situation in a VAD. The nanofiber surface modification concept thus presents a promising approach for the future design of advanced elastic composite materials that are particularly interesting for applications in contact with blood.
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Affiliation(s)
| | | | | | | | - Peter Schweizer
- Department of Materials Science and Engineering, Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy , Friedrich-Alexander-Universität Erlangen-Nürnberg , 91058 Erlangen , Germany
| | | | - Christian Adlhart
- Institute of Chemistry and Biotechnology , Zurich University of Applied Sciences ZHAW , 8820 Wädenswil , Switzerland
| | - Lucie Vejsadová
- Institute of Chemistry and Biotechnology , Zurich University of Applied Sciences ZHAW , 8820 Wädenswil , Switzerland
| | - Robin Pauer
- Electron Microscopy Center , Empa, Swiss Federal Laboratories for Materials Science and Technology , 8600 Dübendorf , Switzerland
| | - Erdmann Spiecker
- Department of Materials Science and Engineering, Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy , Friedrich-Alexander-Universität Erlangen-Nürnberg , 91058 Erlangen , Germany
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10
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Biocompatibility of Plasma-Treated Polymeric Implants. MATERIALS 2019; 12:ma12020240. [PMID: 30642038 PMCID: PMC6356963 DOI: 10.3390/ma12020240] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 12/25/2018] [Accepted: 01/02/2019] [Indexed: 01/16/2023]
Abstract
Cardiovascular diseases are one of the main causes of mortality in the modern world. Scientist all around the world are trying to improve medical treatment, but the success of the treatment significantly depends on the stage of disease progression. In the last phase of disease, the treatment is possible only by implantation of artificial graft. Most commonly used materials for artificial grafts are polymer materials. Despite different industrial procedures for graft fabrication, their properties are still not optimal. Grafts with small diameters (<6 mm) are the most problematic, because the platelets are more likely to re-adhere. This causes thrombus formation. Recent findings indicate that platelet adhesion is primarily influenced by blood plasma proteins that adsorb to the surface immediately after contact of a synthetic material with blood. Fibrinogen is a key blood protein responsible for the mechanisms of activation, adhesion and aggregation of platelets. Plasma treatment is considered as one of the promising methods for improving hemocompatibility of synthetic materials. Another method is endothelialization of materials with Human Umbilical Vein Endothelial cells, thus forming a uniform layer of endothelial cells on the surface. Extensive literature review led to the conclusion that in this area, despite numerous studies there are no available standardized methods for testing the hemocompatibility of biomaterials. In this review paper, the most promising methods to gain biocompatibility of synthetic materials are reported; several hypotheses to explain the improvement in hemocompatibility of plasma treated polymer surfaces are proposed.
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Ohkubo Y, Endo K, Yamamura K. Adhesive-free adhesion between heat-assisted plasma-treated fluoropolymers (PTFE, PFA) and plasma-jet-treated polydimethylsiloxane (PDMS) and its application. Sci Rep 2018; 8:18058. [PMID: 30584251 PMCID: PMC6305381 DOI: 10.1038/s41598-018-36469-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/12/2018] [Indexed: 11/23/2022] Open
Abstract
Conventional low-temperature plasma treatment was reported to minimally improve the adhesion property of polytetrafluoroethylene (PTFE), whereas heat-assisted plasma (HAP) treatment significantly improved the same. An unvulcanized rubber was previously used as an adherent for PTFE. This study aimed to achieve strong adhesive-free adhesion between PTFE and vulcanized polydimethylsiloxane (PDMS) rubber. As-received vulcanized PDMS rubber did not adhere to HAP-treated PTFE, and as-received PTFE did not adhere to vulcanized rubber of plasma-jet (PJ) treated PDMS rubber; however, HAP-treated PTFE strongly adhered to vulcanized PJ-treated PDMS rubber, and both PTFE and PDMS exhibited cohesion failure in the T-peel test. The surface chemical compositions of the PTFE and PDMS sides were determined using X-ray photoelectron spectroscopy. The strong PTFE/PDMS adhesion was explained via hydrogen and covalent bond formation (C–O–Si and/or C(=O)–O–Si) between hydroxyl (C–OH) or carboxyl (C(=O)–OH) groups of the HAP-treated PTFE. This process was also applied to adhesive-free adhesion between a tetrafluoroethylene–perfluoroalkylvinylether copolymer (PFA) and PDMS; subsequently, a translucent PFA/PDMS assembly with strong adhesion was realized together with the PTFE/PDMS assembly. Strong adhesive-free adhesion between fluoropolymers (PTFE, PFA) and vulcanized PDMS rubber without using any adhesives and graft polymer was successfully realized upon plasma treatment of both the fluoropolymer and PDMS sides. Additionally, a PDMS sheet, which was PJ-treated on both sides, was applied to strongly adhere fluoropolymers (PTFE, PFA) to materials such as metal and glass. PJ-treated PDMS was used as an intermediate layer rather than a strong adhesive, achieving PTFE/PDMS/metal and PTFE/PDMS/glass assemblies. The PTFE/PDMS, PDMS/metal, and PDMS/glass adhesion strengths exceeded 2 N/mm.
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Affiliation(s)
- Yuji Ohkubo
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Katsuyoshi Endo
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuya Yamamura
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
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12
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Kizilkan E, Gorb SN. Bioinspired Further Enhanced Dry Adhesive by the Combined Effect of the Microstructure and Surface Free-Energy Increase. ACS APPLIED MATERIALS & INTERFACES 2018; 10:26752-26758. [PMID: 30010312 DOI: 10.1021/acsami.8b06686] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Silicone elastomers are known for having low surface free energies generally leading to poor adhesive performances. This surface characteristic can be enhanced by plasma treatments. The microstructured silicone elastomer surfaces can demonstrate superior adhesive performance that is more than 10 times higher in terms of pull-off forces, compared to their unstructured counterpart. Here, we have demonstrated that the combination of these two methods further enhances adhesive performance, especially when the surfaces are biomimetic micro/nanopatterned with, e.g., beetle-inspired mushroom-shaped adhesive microstructure (MSAMS). The plasma treatment time and pressure parameters were varied for the unstructured and MSAMS poly(vinylsiloxane) surfaces to find optimum parameters for maximum adhesion performance. Air plasma treatment induced average adhesive enhancement forces up to 30% on the unstructured surface, but the MSAMS surface demonstrated an enhancement of adhesive forces up to 91% higher than that of an untreated, microstructured control, despite the plasma-treated surface area of the structured surface being only 50% of that of the unstructured surface. High-speed video-recordings of individual microstructures in contact with a glass surface shows that the origin of the adhesion enhancement is due to the special detachment mechanism of individual microstructures that allows sustaining a wider contact area at detachment. We believe that this integration of the plasma treatment with MSAMS suggests a versatile way of functionalization that can further advance the adhesive ability of low-surface-energy polymer surfaces.
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Affiliation(s)
- Emre Kizilkan
- Department of Functional Morphology and Biomechanics , Zoological Institute, Kiel University , Am Botanischen Garten 1-9 , 24118 Kiel , Germany
| | - Stanislav N Gorb
- Department of Functional Morphology and Biomechanics , Zoological Institute, Kiel University , Am Botanischen Garten 1-9 , 24118 Kiel , Germany
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13
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Study on surface structure of plasma-treated polydimethylsiloxane (PDMS) elastomer by slow positron beam. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6484] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Van Vrekhem S, Vloebergh K, Asadian M, Vercruysse C, Declercq H, Van Tongel A, De Wilde L, De Geyter N, Morent R. Improving the surface properties of an UHMWPE shoulder implant with an atmospheric pressure plasma jet. Sci Rep 2018; 8:4720. [PMID: 29549270 PMCID: PMC5856771 DOI: 10.1038/s41598-018-22921-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/21/2018] [Indexed: 11/09/2022] Open
Abstract
Insufficient glenoid fixation is one of the main reasons for failure in total shoulder arthroplasty. This is predominantly caused by the inert nature of the ultra-high molecular weight polyethylene (UHMWPE) used in the glenoid component of the implant, which makes it difficult to adhesively bind to bone cement or bone. Previous studies have shown that this adhesion can be ameliorated by changing the surface chemistry using plasma technology. An atmospheric pressure plasma jet is used to treat UHMWPE substrates and to modify their surface chemistry. The modifications are investigated using several surface analysis techniques. The adhesion with bone cement is assessed using pull-out tests while osteoblast adhesion and proliferation is also tested making use of several cell viability assays. Additionally, the treated samples are put in simulated body fluid and the resulting calcium phosphate (CaP) deposition is evaluated as a measure of the in vitro bioactivity of the samples. The results show that the plasma modifications result in incorporation of oxygen in the surface, which leads to a significant improved adhesion to bone cement, an enhanced osteoblast proliferation and a more pronounced CaP deposition. The plasma-treated surfaces are therefore promising to act as a shoulder implant.
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Affiliation(s)
- S Van Vrekhem
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000, Ghent, Belgium.
| | - K Vloebergh
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000, Ghent, Belgium
| | - M Asadian
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000, Ghent, Belgium
| | - C Vercruysse
- Tissue Engineering Group, Department of Basic Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185 6B3, 9000, Ghent, Belgium
| | - H Declercq
- Tissue Engineering Group, Department of Basic Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185 6B3, 9000, Ghent, Belgium
| | - A Van Tongel
- Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, De Pintelaan 185 13K12, 9000, Ghent, Belgium
| | - L De Wilde
- Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, De Pintelaan 185 13K12, 9000, Ghent, Belgium
| | - N De Geyter
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000, Ghent, Belgium
| | - R Morent
- Research Unit Plasma Technology, Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000, Ghent, Belgium
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15
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Plegue TJ, Kovach KM, Thompson AJ, Potkay JA. Stability of Polyethylene Glycol and Zwitterionic Surface Modifications in PDMS Microfluidic Flow Chambers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:492-502. [PMID: 29231737 DOI: 10.1021/acs.langmuir.7b03095] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Blood-material interactions are crucial to the lifetime, safety, and overall success of blood contacting devices. Hydrophilic polymer coatings have been employed to improve device lifetime by shielding blood contacting materials from the natural foreign body response, primarily the intrinsic pathway of the coagulation cascade. These coatings have the ability to repel proteins, cells, bacteria, and other micro-organisms. Coatings are desired to have long-term stability, so that the nonthrombogenic and nonfouling effects gained are long lasting. Unfortunately, there exist limited studies which investigate their stability under dynamic flow conditions as encountered in a physiological setting. In addition, direct comparisons between multiple coatings are lacking in the literature. In this study, we investigate the stability of polyethylene glycol (PEG), zwitterionic sulfobetaine silane (SBSi), and zwitterionic polyethylene glycol sulfobetaine silane (PEG-SBSi) grafted by a room temperature, sequential flow chemistry process on polydimethylsiloxane (PDMS) over time under ambient, static fluid (no flow), and physiologically relevant flow conditions and compare the results to uncoated PDMS controls. PEG, SBSi, and PEG-SBSi coatings maintained contact angles below 20° for up to 35 days under ambient conditions. SBSi and PEG-SBSi showed increased stability and hydrophilicity after 7 days under static conditions. They also retained contact angles ≤40° for all shear rates after 7 days under flow, demonstrating their potential for long-term stability. The effectiveness of the coatings to resist platelet adhesion was also studied under physiological flow conditions. PEG showed a 69% reduction in adhered platelets, PEG-SBSi a significant 80% reduction, and SBSi a significant 96% reduction compared to uncoated control samples, demonstrating their potential applicability for blood contacting applications. In addition, the presented coatings and their stability under shear may be of interest in other applications including marine coatings, lab on a chip devices, and contact lenses, where it is desirable to reduce surface fouling due to proteins, cells, and other organisms.
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Affiliation(s)
- Thomas J Plegue
- VA Ann Arbor Healthcare System , Ann Arbor, Michigan 48105, United States
| | - Kyle M Kovach
- Department of Biomedical Engineering, Case Western Reserve University , Cleveland, Ohio 44106, United States
| | - Alex J Thompson
- VA Ann Arbor Healthcare System , Ann Arbor, Michigan 48105, United States
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Joseph A Potkay
- VA Ann Arbor Healthcare System , Ann Arbor, Michigan 48105, United States
- Department of Surgery, University of Michigan , Ann Arbor, Michigan 48109, United States
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16
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Bindu M, Unnikrishnan G. Modulation of dielectric and viscoelastic features of silicone rubber (SR) by nano-hydroxylapatite (n-HA) embedding. NEW J CHEM 2018. [DOI: 10.1039/c8nj00262b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the modulation of dielectric and dynamic mechanical features of silicone rubber (SR), the extensively employed biocompatible elastomer, by embedding it with nano-hydroxylapatite (n-HA) particles.
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Affiliation(s)
- M. Bindu
- Dept. of Chemistry
- National Institute of Technology
- Calicut-673601
- India
| | - G. Unnikrishnan
- Dept. of Chemistry
- National Institute of Technology
- Calicut-673601
- India
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17
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M B, G U. Transport features of nano-hydroxylapatite (n-HA) embedded silicone rubber (SR) systems: influence of SR/n-HA interaction, degree of reinforcement and morphology. Phys Chem Chem Phys 2017; 19:25380-25390. [PMID: 28894865 DOI: 10.1039/c7cp04146b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the transport characteristics of silicone rubber/nano-hydroxylapatite (SR/n-HA) systems at room temperature with reference to the effects of n-HA loading, morphology and penetrant nature, using toluene, xylene, ethyl acetate and butyl acetate in the liquid phase and methanol, ethanol, 1-propanol, 2-propanol and butanol in the vapour phase as probe molecules. The interaction between the n-HA particles and SR matrix has been confirmed by FTIR analysis. As the n-HA content in the SR matrix increased, the penetrant uptake has been found to decrease. The observations have been correlated with the density and void content of the systems. Scanning electron microscopy images have been found to be complementary to the observed transport features. The reinforcement effect of n-HA particles on the SR matrix has been verified by Kraus equation. Molecular mass between the cross links has been observed to decrease with an increase in n-HA loading. The results have been compared with affine, phantom network, parallel, series and Maxwell models. The transport data have been complemented by observations on biological fluid uptake with urea, d-glucose, KI, saline water, phosphate buffer and artificial urine as the media.
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Affiliation(s)
- Bindu M
- Department of Chemistry, National Institute of Technology, Calicut-673601, Kerala, India.
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18
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Epoxy-silicone copolymer synthesis via efficient hydrosilylation reaction catalyzed by high-activity platinum and its effect on structure and performance of silicone rubber coatings. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2127-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Development and characterization of a stable adhesive bond between a poly(dimethylsiloxane) catheter material and a bacterial biofilm resistant acrylate polymer coating. Biointerphases 2017; 12:02C412. [PMID: 28535686 DOI: 10.1116/1.4984011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Catheter associated urinary tract infections are the most common health related infections worldwide, contributing significantly to patient morbidity and mortality and increased health care costs. To reduce the incidence of these infections, new materials that resist bacterial biofilm formation are needed. A composite catheter material, consisting of bulk poly(dimethylsiloxane) (PDMS) coated with a novel bacterial biofilm resistant polyacrylate [ethylene glycol dicyclopentenyl ether acrylate (EGDPEA)-co-di(ethyleneglycol) methyl ether methacrylate (DEGMA)], has been proposed. The coated material shows excellent bacterial resistance when compared to commercial catheter materials, but delamination of the EGDPEA-co-DEGMA coatings under mechanical stress presents a challenge. In this work, the use of oxygen plasma treatment to improve the wettability and reactivity of the PDMS catheter material and improve adhesion with the EGDPEA-co-DEGMA coating has been investigated. Argon cluster three dimensional-imaging time-of-flight secondary ion mass spectrometry (ToF-SIMS) has been used to probe the buried adhesive interface between the EGDPEA-co-DEGMA coating and the treated PDMS. ToF-SIMS analysis was performed in both dry and frozen-hydrated states, and the results were compared to mechanical tests. From the ToF-SIMS data, the authors have been able to observe the presence of PDMS, silicates, salt particles, cracks, and water at the adhesive interface. In the dry catheters, low molecular weight PDMS oligomers at the interface were associated with poor adhesion. When hydrated, the hydrophilic silicates attracted water to the interface and led to easy delamination of the coating. The best adhesion results, under hydrated conditions, were obtained using a combination of 5 min O2 plasma treatment and silane primers. Cryo-ToF-SIMS analysis of the hydrated catheter material showed that the bond between the primed PDMS catheter and the EGDPEA-co-DEGMA coating was stable in the presence of water. The resulting catheter material resisted Escherichia coli and Proteus mirabilis biofilm colonization by up to 95% compared with uncoated PDMS after 10 days of continuous bacterial exposure and had the mechanical properties necessary for use as a urinary catheter.
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20
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Prysiazhnyi V, Saturnino VFB, Kostov KG. Transferred plasma jet as a tool to improve the wettability of inner surfaces of polymer tubes. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2017. [DOI: 10.1080/1023666x.2016.1277053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Vadym Prysiazhnyi
- Faculty of Engineering, Sao Paulo State University, Guaratingueta, Sao Paulo, Brazil
| | | | - Konstantin G. Kostov
- Faculty of Engineering, Sao Paulo State University, Guaratingueta, Sao Paulo, Brazil
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21
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Chen TF, Siow KS, Ng PY, Nai MH, Lim CT, Yeop Majlis B. Ageing properties of polyurethane methacrylate and off-stoichiometry thiol-ene polymers after nitrogen and argon plasma treatment. J Appl Polym Sci 2016. [DOI: 10.1002/app.44107] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tiam Foo Chen
- Institute of Microengineering and Nanoelectronics; Universiti Kebangsaan Malaysia; Bangi Selangor 43600 Malaysia
| | - Kim Shyong Siow
- Institute of Microengineering and Nanoelectronics; Universiti Kebangsaan Malaysia; Bangi Selangor 43600 Malaysia
| | - Pei Yuen Ng
- Faculty of Pharmacy; Universiti Kebangsaan Malaysia; Kuala Lumpur 50300 Malaysia
| | - Mui Hoon Nai
- Mechanobiology Institute, National University of Singapore; 5A Engineering Drive 1 Singapore 117411 Singapore
| | - Chwee Teck Lim
- Mechanobiology Institute, National University of Singapore; 5A Engineering Drive 1 Singapore 117411 Singapore
- Department of Biomedical Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117575 Singapore
| | - Burhanuddin Yeop Majlis
- Institute of Microengineering and Nanoelectronics; Universiti Kebangsaan Malaysia; Bangi Selangor 43600 Malaysia
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22
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Fibrinogen adsorption and platelet adhesion to silica surfaces with stochastic nanotopography. Biointerphases 2015; 9:041002. [PMID: 25553877 DOI: 10.1116/1.4900993] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this study, the effect of surface nanoscale roughness on fibrinogen adsorption and platelet adhesion was investigated. Nanorough silica surfaces with a low level of surface roughness (10 nm Rrms) were found to support the same level of fibrinogen adsorption as the planar silica surfaces, while nanorough silica surfaces with higher levels of surface roughness (15 nm Rrms) were found to support significantly less fibrinogen adsorption. All surfaces analyzed were found to support the same level of platelet adhesion; however, platelets were rounded in morphology on the nanorough silica surfaces while platelets were spread with a well-developed actin cytoskeleton on the planar silica. Unique quartz crystal microbalance with dissipation monitoring (QCM-D) responses was observed for the interactions between platelets and each of the surfaces. The QCM-D data indicated that platelets were more weakly attached to the nanorough silica surfaces compared with the planar silica. These data support the role of surface nanotopography in directing platelet-surface interactions even when the adsorbed fibrinogen layer is able to support the same level of platelet adhesion.
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23
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Salehi-Nik N, Amoabediny G, Shokrgozar MA, Mottaghy K, Klein-Nulend J, Zandieh-Doulabi B. Surface modification of silicone tubes by functional carboxyl and amine, but not peroxide groups followed by collagen immobilization improves endothelial cell stability and functionality. ACTA ACUST UNITED AC 2015; 10:015024. [PMID: 25730524 DOI: 10.1088/1748-6041/10/1/015024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Surface modification by functional groups promotes endothelialization in biohybrid artificial lungs, but whether it affects endothelial cell stability under fluid shear stress, and the release of anti-thrombotic factors, e.g. nitric oxide (NO), is unknown. We aimed to test whether surface-modified silicone tubes containing different functional groups, but similar wettability, improve collagen immobilization, endothelialization, cell stability and cell-mediated NO-release. Peroxide, carboxyl, and amine-groups increased collagen immobilization (41-76%). Only amine-groups increased ultimate tensile strength (2-fold). Peroxide and amine enhanced (1.5-2.5 fold), but carboxyl-groups decreased (2.9-fold) endothelial cell number after 6 d. After collagen immobilization, cell numbers were enhanced by all group-modifications (2.8-3.8 fold). Cells were stable under 1 h-fluid shear stress on amine, but not carboxyl or peroxide-group-modified silicone (>50% cell detachment), while cells were also stable on carboxyl-group-modified silicone with immobilized collagen. NO-release was increased by peroxide and amine (1.1-1.7 fold), but decreased by carboxyl-group-modification (9.8-fold), while it increased by all group-modifications after collagen immobilization (1.8-2.8 fold). Only the amine-group-modification changed silicone stiffness and transparency. In conclusion, silicone-surface modification of blood-contacting parts of artificial lungs with carboxyl and amine, but not peroxide-groups followed by collagen immobilization allows the formation of a stable functional endothelial cell layer. Amine-group-modification seems undesirable since it affected silicone's physical properties.
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Affiliation(s)
- Nasim Salehi-Nik
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran. Department of Biomedical Engineering, Research Center for New Technologies in Life Science Engineering, University of Tehran, Tehran, Iran
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24
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Rambarran T, Gonzaga F, Brook MA, Lasowski F, Sheardown H. Amphiphilic thermoset elastomers from metal-free, click crosslinking of PEG-grafted silicone surfactants. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27539] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Talena Rambarran
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Str. W. Hamilton ON Canada L8S 4M1
| | - Ferdinand Gonzaga
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Str. W. Hamilton ON Canada L8S 4M1
| | - Michael A. Brook
- Department of Chemistry and Chemical Biology; McMaster University; 1280 Main Str. W. Hamilton ON Canada L8S 4M1
| | - Frances Lasowski
- Department of Chemical Engineering; McMaster University; 1280 Main Str. W. Hamilton ON Canada L8S 4M1
| | - Heather Sheardown
- Department of Chemical Engineering; McMaster University; 1280 Main Str. W. Hamilton ON Canada L8S 4M1
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25
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Ribeiro AS, Zaleta-Rivera K, Ashley EA, Pruitt BL. Stable, covalent attachment of laminin to microposts improves the contractility of mouse neonatal cardiomyocytes. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15516-26. [PMID: 25133578 PMCID: PMC4160263 DOI: 10.1021/am5042324] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The mechanical output of contracting cardiomyocytes, the muscle cells of the heart, relates to healthy and disease states of the heart. Culturing cardiomyocytes on arrays of elastomeric microposts can enable inexpensive and high-throughput studies of heart disease at the single-cell level. However, cardiomyocytes weakly adhere to these microposts, which limits the possibility of using biomechanical assays of single cardiomyocytes to study heart disease. We hypothesized that a stable covalent attachment of laminin to the surface of microposts improves cardiomyocyte contractility. We cultured cells on polydimethylsiloxane microposts with laminin covalently bonded with the organosilanes 3-glycidoxypropyltrimethoxysilane and 3-aminopropyltriethoxysilane with glutaraldehyde. We measured displacement of microposts induced by the contractility of mouse neonatal cardiomyocytes, which attach better than mature cardiomyocytes to substrates. We observed time-dependent changes in contractile parameters such as micropost deformation, contractility rates, contraction and relaxation speeds, and the times of contractions. These parameters were affected by the density of laminin on microposts and by the stability of laminin binding to micropost surfaces. Organosilane-mediated binding resulted in higher laminin surface density and laminin binding stability. 3-glycidoxypropyltrimethoxysilane provided the highest laminin density but did not provide stable protein binding with time. Higher surface protein binding stability and strength were observed with 3-aminopropyltriethoxysilane with glutaraldehyde. In cultured cardiomyocytes, contractility rate, contraction speeds, and contraction time increased with higher laminin stability. Given these variations in contractile function, we conclude that binding of laminin to microposts via 3-aminopropyltriethoxysilane with glutaraldehyde improves contractility observed by an increase in beating rate and contraction speed as it occurs during the postnatal maturation of cardiomyocytes. This approach is promising for future studies to mimic in vivo tissue environments.
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Affiliation(s)
- Alexandre
J. S. Ribeiro
- Department of Mechanical Engineering and Stanford Cardiovascular Institute, Stanford University, Stanford, California United
States
| | - Kathia Zaleta-Rivera
- Department of Mechanical Engineering and Stanford Cardiovascular Institute, Stanford University, Stanford, California United
States
- Department of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California United States
| | - Euan A. Ashley
- Department of Mechanical Engineering and Stanford Cardiovascular Institute, Stanford University, Stanford, California United
States
- Department of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California United States
| | - Beth L. Pruitt
- Department of Mechanical Engineering and Stanford Cardiovascular Institute, Stanford University, Stanford, California United
States
- E-mail: . Fax: +1 650 725 1587. Phone: +1 650 723 2300
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26
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Lopez-Donaire ML, Santerre JP. Surface modifying oligomers used to functionalize polymeric surfaces: Consideration of blood contact applications. J Appl Polym Sci 2014. [DOI: 10.1002/app.40328] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- M. Luisa Lopez-Donaire
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Ontario Canada
- Faculty of Dentistry; University of Toronto; Ontario M5G 1G6 Canada
| | - J. Paul Santerre
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Ontario Canada
- Faculty of Dentistry; University of Toronto; Ontario M5G 1G6 Canada
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27
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Qiu H, He C, Zhou L, Shao H, Fan H, Mo H, Zhang J, Zhou N, Shen J. Thermal stability and kinetics of thermal degradation of PMVS/SiO 2/GO-C 12-hep composites. J Appl Polym Sci 2013. [DOI: 10.1002/app.39165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Peršin Z, Devetak M, Drevenšek-Olenik I, Vesel A, Mozetič M, Stana-Kleinschek K. The study of plasma's modification effects in viscose used as an absorbent for wound-relevant fluids. Carbohydr Polym 2013; 97:143-51. [DOI: 10.1016/j.carbpol.2013.04.045] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 03/25/2013] [Accepted: 04/12/2013] [Indexed: 11/24/2022]
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29
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Jokinen V, Suvanto P, Franssila S. Oxygen and nitrogen plasma hydrophilization and hydrophobic recovery of polymers. BIOMICROFLUIDICS 2012; 6:16501-1650110. [PMID: 22685510 PMCID: PMC3370401 DOI: 10.1063/1.3673251] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 12/07/2011] [Indexed: 05/04/2023]
Abstract
PLASMA HYDROPHILIZATION AND SUBSEQUENT HYDROPHOBIC RECOVERY ARE STUDIED FOR TEN DIFFERENT POLYMERS OF MICROFABRICATION INTEREST: polydimethylsiloxane (PDMS), polymethylmethacrylate, polycarbonate, polyethylene, polypropylene, polystyrene, epoxy polymer SU-8, hybrid polymer ORMOCOMP, polycaprolactone, and polycaprolactone/D,L-lactide (P(CL/DLLA)). All polymers are treated identically with oxygen and nitrogen plasmas, in order to make comparisons between polymers as easy as possible. The primary measured parameter is the contact angle, which was measured on all polymers for more than 100 days in order to determine the kinetics of the hydrophobic recovery for both dry stored and rewashed samples. Clear differences and trends are observed both between different polymers and between different plasma parameters.
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Affiliation(s)
- Ville Jokinen
- Department of Materials Science and Engineering, Aalto University, School of Chemical Technology, Espoo, Finland
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30
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Kuo WH, Wang MJ, Chien HW, Wei TC, Lee C, Tsai WB. Surface Modification with Poly(sulfobetaine methacrylate-co-acrylic acid) To Reduce Fibrinogen Adsorption, Platelet Adhesion, and Plasma Coagulation. Biomacromolecules 2011; 12:4348-56. [DOI: 10.1021/bm2013185] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei-Hsuan Kuo
- Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Rd.,
Sec. 4, Taipei 106, Taiwan
| | - Meng-Jiy Wang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Rd.,
Sec. 4, Taipei 106, Taiwan
| | - Hsiu-Wen Chien
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106,
Taiwan
| | - Ta-Chin Wei
- Department of Chemical
Engineering, Chung Yuan Christian University, 200, Chung Pei Rd., Chung Li 320, Taiwan
| | - Chiapyng Lee
- Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Rd.,
Sec. 4, Taipei 106, Taiwan
| | - Wei-Bor Tsai
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106,
Taiwan
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31
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Liu Y, Zhang LQ, Wang WC, Yu HT, Lu YL. Preparation of polydimethylsiloxane-coated α-alumina fillers with cold plasma for elastomer thermal interface materials. J Appl Polym Sci 2011. [DOI: 10.1002/app.34856] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Solouk A, Cousins BG, Mirzadeh H, Solati-Hashtjin M, Najarian S, Seifalian AM. Surface modification of POSS-nanocomposite biomaterials using reactive oxygen plasma treatment for cardiovascular surgical implant applications. Biotechnol Appl Biochem 2011; 58:147-61. [PMID: 21679238 DOI: 10.1002/bab.22] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 03/04/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Atefeh Solouk
- Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London (UCL), UK
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33
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Pinto S, Alves P, Matos CM, Santos AC, Rodrigues LR, Teixeira JA, Gil MH. Poly(dimethyl siloxane) surface modification by low pressure plasma to improve its characteristics towards biomedical applications. Colloids Surf B Biointerfaces 2010; 81:20-6. [PMID: 20638249 DOI: 10.1016/j.colsurfb.2010.06.014] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 06/16/2010] [Accepted: 06/17/2010] [Indexed: 11/16/2022]
Abstract
Poly(dimethyl siloxane) elastomer, (PDMS) is widely used as a biomaterial. However, PDMS is very hydrophobic and easily colonized by several bacteria and yeasts. Consequently, surface modification has been used to improve its wettability and reduce bacterial adhesion. The aim of this work was to modify the PDMS surface in order to improve its hydrophilicity and bacterial cell repulsion to be used as a biomaterial. Plasma was used to activate the PDMS surface and sequentially promote the attachment of a synthetic surfactant, Pluronic F-68, or a polymer, Poly(ethylene glycol) methyl methacrylate, PEGMA. Bare PDMS, PDMS argon plasma activated, PDMS coated with Pluronic F-68 and PEGMA-grafted PDMS were characterized by contact angle measurements, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The influence of the surface modifications on blood compatibility of the materials was evaluated by thrombosis and haemolysis assays. The cytotoxicity of these materials was tested for mouse macrophages. After modification, AFM results suggest the presence of a distinct layer at the surface and by the contact angle measures it was observed an increase of hydrophilicity. XPS analysis indicates an increase of the oxygen content at the surface as a result of the modification. All the studied materials revealed no toxicity and were found to be non-haemolytic or in some cases slightly haemolytic. Therefore, plasma was found to be an effective technique for the PDMS surface modification.
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Affiliation(s)
- S Pinto
- Department of Chemical Engineering, University of Coimbra, Polo II, Pinhal de Marrocos, Rua Sílvio Lima, 3030-790 Coimbra, Portugal.
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35
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Powers DE, Millman JR, Bonner-Weir S, Rappel MJ, Colton CK. Accurate control of oxygen level in cells during culture on silicone rubber membranes with application to stem cell differentiation. Biotechnol Prog 2009; 26:805-18. [DOI: 10.1002/btpr.359] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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37
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Urushihara Y, Nishino T. Surface properties of O2-plasma-treated thermoplastic fluoroelastomers under mechanical stretching. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.04.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cordeiro AL, Zschoche S, Janke A, Nitschke M, Werner C. Functionalization of poly(dimethylsiloxane) surfaces with maleic anhydride copolymer films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:1509-1517. [PMID: 19123804 DOI: 10.1021/la803054s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Combining advantageous bulk properties of polymeric materials with surface-selective chemical conversions is required in numerous advanced technologies. For that aim, we investigate strategies to graft maleic anhydride (MA) copolymer films onto poly(dimethylsiloxane) (PDMS) precoatings. Amino groups allowing the covalent attachment of the MA copolymer films to the PDMS (Sylgard 184) surface were introduced either by low-pressure ammonia plasma treatment, or by attachment of 3-aminopropyltriethoxysilane (APTES) onto air plasma-treated PDMS. The resultant coatings were extensively characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), contact angle measurements, and atomic force microscopy (AFM). The results show that the impact of the plasma treatment on the physical properties on the topmost surface of the PDMS is critically important for the characteristics of the layered coatings.
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Affiliation(s)
- Ana L Cordeiro
- Leibniz Institute of Polymer Research Dresden; Max Bergmann Center of Biomaterials Dresden, Hohe Str. 6, 01069 Dresden, Germany.
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Roth J, Albrecht V, Nitschke M, Bellmann C, Simon F, Zschoche S, Michel S, Luhmann C, Grundke K, Voit B. Surface functionalization of silicone rubber for permanent adhesion improvement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:12603-12611. [PMID: 18828614 DOI: 10.1021/la801970s] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The surface properties of poly(dimethyl siloxane) (PDMS) layers screen printed onto silicon wafers were studied after oxygen and ammonia plasma treatments and subsequent grafting of poly(ethylene -alt-maleic anhydride) (PEMA) using X-ray photoelectron spectroscopy (XPS), roughness analysis, and contact angle and electrokinetic measurements. In the case of oxygen-plasma-treated PDMS, a hydrophilic, brittle, silica-like surface layer containing reactive silanol groups was obtained. These surfaces indicate a strong tendency for "hydrophobic recovery" due to the surface segregation of low-molecular-weight PDMS species. The ammonia plasma treatment of PDMS resulted in the generation of amino-functional surface groups and the formation of a weak boundary layer that could be washed off by polar liquids. To avoid the loss of the plasma modification effect and to achieve stabilization of the mechanically instable, functionalized PDMS top layer, PEMA was subsequently grafted directly or after using gamma-APS as a coupling agent on the plasma-activated PDMS surfaces. In this way, long-time stable surface functionalization of PDMS was obtained. The reactivity of the PEMA-coated PDMS surface caused by the availability of anhydride groups could be controlled by the number of amino functional surface groups of the PDMS surface necessary for the covalent binding of PEMA. The higher the number of amino functional surface groups available for the grafting-to procedure, the lower the hydrophilicity and hence the lower the reactivity of the PEMA-coated PDMS surface. Additionally, pull-off tests were applied to estimate the effect of surface modification on the adhesion between the silicone rubber and an epoxy resin.
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Affiliation(s)
- Jan Roth
- Leibniz Institute of Polymer Research Dresden, P.O. Box 120 411, D-01005 Dresden, Germany
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Ren TB, Weigel T, Groth T, Lendlein A. Microwave plasma surface modification of silicone elastomer with allylamine for improvement of biocompatibility. J Biomed Mater Res A 2008; 86:209-19. [DOI: 10.1002/jbm.a.31508] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Haines SR, Beamson G, Williams RL, Weightman P. Changes in the electronic structure of silicone rubber surfaces induced by oxygen plasma treatment. SURF INTERFACE ANAL 2007. [DOI: 10.1002/sia.2646] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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van Poll ML, Zhou F, Ramstedt M, Hu L, Huck WTS. A Self-Assembly Approach to Chemical Micropatterning of Poly(dimethylsiloxane). Angew Chem Int Ed Engl 2007; 46:6634-7. [PMID: 17654758 DOI: 10.1002/anie.200702286] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Maaike L van Poll
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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van Poll M, Zhou F, Ramstedt M, Hu L, Huck W. A Self-Assembly Approach to Chemical Micropatterning of Poly(dimethylsiloxane). Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200702286] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Krishna Y, Sheridan CM, Kent DL, Grierson I, Williams RL. Polydimethylsiloxane as a substrate for retinal pigment epithelial cell growth. J Biomed Mater Res A 2007; 80:669-78. [PMID: 17058209 DOI: 10.1002/jbm.a.30953] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Retinal pigment epithelial (RPE) cell transplantation represents potential treatment for age-related macular degeneration (AMD). Because delivery of isolated cells can cause serious complications, it is necessary to develop a suitable transplant membrane that could support an intact functioning RPE monolayer. Polydimethylsiloxane (PDMS) possesses the physical properties required for a transplanting device and is widely used clinically. We have investigated the use of PDMS as a potential surface for the growth of healthy RPE monolayers. PDMS discs were surface modified by air and ammonia gas plasma treatments. Dynamic contact angles were measured to determine the changes in wettability. Human ARPE-19 cells were seeded onto untreated and treated samples. Cell number, morphology and monolayer formation, cytotoxicity, and phagocytosis of photoreceptor outer segments (POS) were assessed at set time-points. Air plasma treatment increased the wettability of PDMS. This significantly enhanced cell growth, reaching confluence by day 7. Immunofluorescence revealed well-defined actin staining, monolayer formation, and high cell viability on air plasma treated and untreated surfaces, and to a lesser extent, on ammonia plasma treated. Furthermore, RPE monolayers were able to demonstrate phagocytosis of POS in a time-dependent manner similar to control. PDMS can support an intact functional monolayer of healthy differentiated RPE cells.
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Affiliation(s)
- Yamini Krishna
- Department of Ophthalmology, School of Clinical Sciences, The University of Liverpool, Liverpool L69 3GA, United Kingdom.
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Li B, Chen J, Wang JHC. RGD peptide-conjugated poly(dimethylsiloxane) promotes adhesion, proliferation, and collagen secretion of human fibroblasts. J Biomed Mater Res A 2006; 79:989-98. [PMID: 16948145 DOI: 10.1002/jbm.a.30847] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel technique for conjugating Arg-Gly-Asp (RGD) peptides to poly(dimethylsiloxane) (PDMS) surfaces as well as its application to cell culture is presented in this paper. This technique performs RGD conjugation to PDMS through photochemical immobilization of functional NHS groups to PDMS surface followed with linking RGD peptide to the surface via coupling reaction with NHS. A bifunctional photolinker, N-sulfosuccinimidyl-6-(4'-azido-2'-nitrophenylamino)hexanoate (sulfo-SANPAH), was used to conjugate RGD peptide to the surface. Compared to existing methods for peptide conjugation to PDMS, this technique is convenient, efficient, and free of organic contamination to PDMS surfaces. It can also be used to conjugate other peptides or proteins to most polymeric materials. In addition, cell culture studies showed that the RGD-conjugated PDMS surfaces promoted the adhesion, proliferation, and collagen production of human skin fibroblasts (HSFs). Finally, the RGD-conjugated PDMS surfaces are resistant to autoclaving and UV irradiation, which enables them to be repeatedly used in cell culture studies.
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Affiliation(s)
- Bin Li
- MechanoBiology Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh, Pennsylvania 15213, USA
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Yuen C, Williams R, Batterbury M, Grierson I. Modification of the surface properties of a lens material to influence posterior capsular opacification. Clin Exp Ophthalmol 2006; 34:568-74. [PMID: 16925705 DOI: 10.1111/j.1442-9071.2006.01278.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To study the effect of surface properties of materials on cellular behaviour and the formation of posterior capsular opacification (PCO). METHODS Polymethylmethacrylate, silicone and a hydrophobic acrylic were plasma treated and used in tissue culture. The changes in surface properties were quantified by dynamic contact angle measurements. Bovine lens epithelial cells (BLECs) were seeded onto these materials and cultured for 1 month. Serial photographs were taken. The cells were then fixed and stained to facilitate counting. RESULTS Plasma treatment significantly increased the hydrophilicity of surfaces. BLECs grew on all surfaces but significantly more cells adhered to the treated than the untreated surfaces. On the untreated surfaces the BLECs had a fibroblastic morphology whereas on the treated surfaces the cells maintained their epithelial morphology. CONCLUSIONS Posterior capsular opacification is a form of wound healing and the behaviour of lens epithelial cells is central to its progression. Emphasis has been on the elimination of residual lens epithelial cells to combat PCO. This study demonstrated that the phenotype of BLECs was influenced by the surface properties of the intraocular lens materials. Gas plasma treatment of the materials increased their hydrophilicity and allowed the adhered BLECs to maintain their normal epithelial morphology. We believe that controlled growth of lens epithelial cells may reduce the incidence of PCO.
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Affiliation(s)
- Conrad Yuen
- Ophthalmology, University Clinical Department, School of Clinical Sciences, University of Liverpool, Liverpool, UK.
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Klenkler BJ, Griffith M, Becerril C, West-Mays JA, Sheardown H. EGF-grafted PDMS surfaces in artificial cornea applications. Biomaterials 2005; 26:7286-96. [PMID: 16019066 DOI: 10.1016/j.biomaterials.2005.05.045] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Lack of epithelial cell coverage has remained a persistent problem in the design of an artificial cornea. In this work, polydimethylsiloxane (PDMS) surfaces were modified with epidermal growth factor (EGF) to improve the growth of corneal epithelial cells. The EGF was covalently tethered to PDMS substrates aminated by plasma polymerization of allylamine via a homobifunctional polyethylene glycol (PEG) spacer. Surface modification was confirmed by contact angle and X-ray photoelectron spectroscopy measurements. By varying the ratio of EGF to PEG from 1:50 to 1:5, EGF amounts from 40 to 90 ng/cm2 could be bound, as determined by surface plasmon resonance (SPR) and 125I radiolabelling. Human corneal epithelial cells on the various modified surfaces were cultured both in the presence and absence of EGF in the culture medium to determine the effect of covalently bound EGF on the cells. The results demonstrated that covalently bound EGF on the surfaces is active with respect to promoting epithelial cell coverage. This was significant when compared to unmodified controls.
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Affiliation(s)
- B J Klenkler
- Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada L8S 4L7
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Williams RL, Krishna Y, Dixon S, Haridas A, Grierson I, Sheridan C. Polyurethanes as potential substrates for sub-retinal retinal pigment epithelial cell transplantation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2005; 16:1087-92. [PMID: 16362205 DOI: 10.1007/s10856-005-4710-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2005] [Accepted: 07/18/2005] [Indexed: 05/05/2023]
Abstract
Transplantation of cultured retinal pigment epithelial (RPE) cells under the failing macular is a potential treatment for age related macular degeneration. An important step in the development of this procedure is the identification of a suitable membrane on which to grow and transplant the cells. This paper evaluates the potential of using polyurethanes in this application since they possess several of the required properties, such as, flexibility, robustness, biostability and good biocompatiblilty although their hydrophobicity can limit cell adhesion. Three commercially available polyether urethanes (Pellethane, Tecoflex and Zytar) were evaluated in terms of their wettability using dynamic contact angle analysis and their ability to support a monolayer of functioning RPE cells (ARPE-19) . Furthermore Pellethane and Tecoflex were treated with a simple air plasma treatment and analysed as above. In the "as received condition" only a few RPE cells attached to the Pellethane and Tecoflex and remained clumped. RPE cells grew to confluence on the Zytar substrate by 7 days without further surface modification. Air gas plasma treatment of both Pellethane and Tecoflex increased the wettability of the surfaces and this resulted in the growth of a monolayer of well-spread RPE cells on both materials. Morphologically these cells grew with a normal 'cobblestone' phenotype. These results demonstrate the potential of these polyurethanes for this application.
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Affiliation(s)
- R L Williams
- Clinical Engineering, University of Liverpool, L69 3GA, UK.
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