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Ataee B, Khorasani MT, Karimi M, Daliri-Joupari M. Surface modification of polyurethane/HCNT nanocomposite with octavinyl polyhedral oligomeric silsesquioxane as a heart valve material. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1937160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Boshra Ataee
- Department of Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Majid Karimi
- Polymerization Engineering Department, Iran Polymer and Petrochemical Institute, Tehran, Iran
| | - Morteza Daliri-Joupari
- Department of Animal, Avian and Marine Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
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2
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Razavi M, Primavera R, Vykunta A, Thakor AS. Silicone-based bioscaffolds for cellular therapies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 119:111615. [DOI: 10.1016/j.msec.2020.111615] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 08/18/2020] [Accepted: 10/05/2020] [Indexed: 12/27/2022]
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3
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Keshmiri K, Huang H, Nazemifard N. Compatibility of poly(dimethylsiloxane) microfluidic systems with high viscosity hydrocarbons. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0666-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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4
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Varshney N, Sahi AK, Vajanthri KY, Poddar S, Balavigneswaran CK, Prabhakar A, Rao V, Mahto SK. Culturing melanocytes and fibroblasts within three-dimensional macroporous PDMS scaffolds: towards skin dressing material. Cytotechnology 2019; 71:287-303. [PMID: 30603924 PMCID: PMC6368518 DOI: 10.1007/s10616-018-0285-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 11/28/2018] [Indexed: 12/20/2022] Open
Abstract
In the present study, we propose a platform for topical wound dressing material using a polydimethylsiloxane (PDMS) scaffold in order to enhance the skin healing process. In vitro co-culture assessment of epidermal-origin mouse B16-F10 melanocyte cells and mouse L929 fibroblast cells in three-dimensional polymeric scaffolds has been carried out towards developing bio-stable, interconnected, highly macroporous, PDMS based tissue-engineered scaffolds, using the salt leaching method. To determine a suitable ratio of salt to PDMS pre-polymer in the scaffold, two different samples with ratios 2:1 and 3:1 [w/w], were fabricated. Effective pore sizes of both scaffolds were observed to lie in the desirable range of 152-165 μm. In addition, scaffolds were pre-coated with collagen and investigated as a podium for culturing the chosen cells (fibroblast and melanocyte cells). Experimental results demonstrate not only a high proliferative potential of the skin tissue-specific cells within the fabricated PDMS based scaffolds but also confirm the presence of several other essential attributes such as high interconnectivity, optimum porosity, excellent mechanical strength, gaseous permeability, promising cell compatibility, water absorption capability and desired surface wettability. Therefore, scaffolds facilitate a high degree of cellular adhesion while providing a microenvironment necessary for optimal cellular infiltration and viability. Thus, the outcomes suggest that PDMS based macroporous scaffold can be used as a potential candidate for skin dressing material. In addition, the fabricated PDMS scaffolds may also be exploited for a plethora of other applications in tissue engineering and drug delivery.
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Affiliation(s)
- Neelima Varshney
- Tissue Engineering and Biomicrofluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Ajay Kumar Sahi
- Tissue Engineering and Biomicrofluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Kiran Yellappa Vajanthri
- Tissue Engineering and Biomicrofluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Suruchi Poddar
- Tissue Engineering and Biomicrofluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Chelladurai Karthikeyan Balavigneswaran
- Tissue Engineering and Biomicrofluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India
| | - Arumugam Prabhakar
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi, 110001, India
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, 110025, India
| | - Vivek Rao
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhavan, 2 Rafi Marg, New Delhi, 110001, India
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, 110025, India
| | - Sanjeev Kumar Mahto
- Tissue Engineering and Biomicrofluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India.
- Centre for Advanced Biomaterials and Tissue Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India.
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The role played by modified bioinspired surfaces in interfacial properties of biomaterials. Biophys Rev 2017; 9:683-698. [PMID: 28831703 DOI: 10.1007/s12551-017-0306-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 07/31/2017] [Indexed: 02/06/2023] Open
Abstract
The success of a biomaterial relies on an appropriate interaction between the surface of that biomaterial and the surrounding environment; more specifically, the success of a biomaterial depends on how fluids, proteins, and cells interact with the foreign material. For this reason, the surface properties of biomaterial, such as composition, charge, wettability, and roughness, must be optimized for a desired application to be achieved. In this review we highlight different bioinspired approaches that are used to manipulate and fine-tune the interfacial properties of biomaterials. Inspired by noteworthy natural processes, researchers have developed materials with a functional anatomy that range from hierarchical hybrid structures to self-cleaning interfaces. In this review we focus on (1) the creation of particles and modified surfaces inspired by the structure and composition of biogenic mineralized tissues, (2) the development of biofunctional coatings, (3) materials inspired by biomembranes and proteins, and (4) the design of superwettable materials. Our intention is to point out different bioinspired methodologies that have been used to design materials for biomedical applications and to discuss how interfacial properties modified by manipulation of these materials determine their final biological response. Our objective is to present future research directions and to highlight the potential of bioinspired materials. We hope this review will provide an understanding of the interplay between interfacial properties and biological response so that successful biomaterials can be achieved.
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6
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Sun B, Du Z, Cao H, Du L, Yu W. Oxidation-grafting surface modification of waste silicone rubber composite insulator powder: Characterizations and properties of EPDM/modified waste powder composites. J Appl Polym Sci 2017. [DOI: 10.1002/app.45438] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bin Sun
- College of Science, Beijing Key Laboratory of Environmentally Harmful Chemical Analysis; Beijing University of Chemical Technology; Beijing 100029 China
| | - Zhenxia Du
- College of Science, Beijing Key Laboratory of Environmentally Harmful Chemical Analysis; Beijing University of Chemical Technology; Beijing 100029 China
| | - Hongwei Cao
- Henan Electric Power Research Institute; Zhengzhou 450052 China
| | - Linjuan Du
- Henan Electric Power Research Institute; Zhengzhou 450052 China
| | - Wenlian Yu
- Chinese Academy of Inspection and Quarantine; Beijing 100176 China
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7
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Bahramzadeh A, Zahedi P, Abdouss M. Acrylamide-plasma treated electrospun polystyrene nanofibrous adsorbents for cadmium and nickel ions removal from aqueous solutions. J Appl Polym Sci 2015. [DOI: 10.1002/app.42944] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Alireza Bahramzadeh
- School of Chemical Engineering, College of Engineering; University of Tehran; Tehran Iran
| | - Payam Zahedi
- School of Chemical Engineering, College of Engineering; University of Tehran; Tehran Iran
| | - Majid Abdouss
- Department of Chemistry; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
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8
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Harvey AG, Hill EW, Bayat A. Designing implant surface topography for improved biocompatibility. Expert Rev Med Devices 2014; 10:257-67. [DOI: 10.1586/erd.12.82] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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9
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Ashcroft BA, de Sonneville J, Yuana Y, Osanto S, Bertina R, Kuil ME, Oosterkamp TH. Determination of the size distribution of blood microparticles directly in plasma using atomic force microscopy and microfluidics. Biomed Microdevices 2012; 14:641-9. [PMID: 22391880 PMCID: PMC3388260 DOI: 10.1007/s10544-012-9642-y] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Microparticles, also known as microvesicles, found in blood plasma, urine, and most other body fluids, may serve as valuable biomarkers of diseases such as cardiovascular diseases, systemic inflammatory disease, thrombosis, and cancer. Unfortunately, the detection and quantification of microparticles are hampered by the microscopic size of these particles and their relatively low abundance in blood plasma. The use of a combination of microfluidics and atomic force microscopy to detect microparticles in blood plasma circumvents both problems. In this study, capture of a specific subset of microparticles directly from blood plasma on antibody-coated mica surface is demonstrated. The described method excludes isolation and washing steps to prepare microparticles, improves the detection sensitivity, and yields the size distribution of the captured particles. The majority of the captured particles have a size ranging from 30 to 90 nm, which is in good agreement with prior results obtained with microparticles immediately isolated from fresh plasma. Furthermore, the qualitative shape of the size distribution of microparticles is shown not to be affected by high-speed centrifugation or the use of the microfluidic circuit, demonstrating the relative stable nature of microparticles ex vivo.
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Affiliation(s)
- B A Ashcroft
- Leiden Institute of Physics, Leiden, The Netherlands
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10
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Bagheri-Khoulenjani S, Mirzadeh H. Polystyrene surface modification using excimer laser and radio-frequency plasma: blood compatibility evaluations. Prog Biomater 2012; 1:4. [PMID: 29470726 PMCID: PMC5120664 DOI: 10.1186/2194-0517-1-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Accepted: 10/28/2012] [Indexed: 11/10/2022] Open
Abstract
Biomaterial surface modification is an efficient method to improve and control blood component-material interactions. In the present study, two different methods (ArF excimer laser irradiation and radio-frequency (RF) plasma treatment) were applied in separate procedures to create a vast range of physicochemical characteristics on the surface of polystyrene (PS) and investigate their effects on blood compatibility of treated surfaces. Atomic force microscopy (AFM) and Fourier transmission infrared analysis were applied to study the morphology and chemical characteristics of treated samples in comparison with those of the untreated PS. Contact angle and surface tension measurements with two different solvents were used to evaluate the wettability and surface energy of the treated PS films. The effect of the physicochemical properties of the PS surface on blood compatibility was investigated using lactate dehydrogenase (LDH) method. AFM studies showed that after laser treatment, some distinctive nanostructures are created on the surface of PS. The data from contact angle measurements demonstrated that ArF excimer laser irradiation and RF plasma treatment created surfaces with a vast range of properties in the wettability point of view. The LDH results revealed that after surface modification by laser irradiation and plasma treatment, blood compatibility of PS films was enhanced. In addition, these results offered that the most blood compatible samples were those which irradiated with 5 pulses of laser and the one treated 4 minutes in oxygen plasma.
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Affiliation(s)
- Shadab Bagheri-Khoulenjani
- Department of Polymer Engineering, Amirkabir University of Technology, 424 Hafez-Ave., P.O. Box 15875-4413, Tehran, Iran
| | - Hamid Mirzadeh
- Department of Polymer Engineering, Amirkabir University of Technology, 424 Hafez-Ave., P.O. Box 15875-4413, Tehran, Iran.
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11
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Pedraza E, Brady AC, Fraker CA, Stabler CL. Synthesis of macroporous poly(dimethylsiloxane) scaffolds for tissue engineering applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 24:1041-56. [PMID: 23683037 DOI: 10.1080/09205063.2012.735097] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Macroporous, biostable scaffolds with controlled porous architecture were prepared from poly(dimethylsiloxane) (PDMS) using sodium chloride particles and a solvent casting and particulate leaching technique. The effect of particulate size range and overall porosity on the resulting structure was evaluated. Results found 90% v/v scaffolds and particulate ranges above 100 μm to have the most optimal open framework and porosity. Resulting hydrophobic PDMS scaffolds were coated with fibronectin and evaluated as a platform for adherent cell culture using human mesenchymal stem cells. Biocompatibility of PDMS scaffolds was also evaluated in a rodent model, where implants were found to be highly biocompatible and biostable, with positive extracellular matrix deposition throughout the scaffold. These results demonstrate the suitability of macroporous PDMS scaffolds for tissue engineering applications where strong integration with the host is desired.
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Affiliation(s)
- Eileen Pedraza
- Department of Biomedical Engineering, College of Engineering, University of Miami, Coral Gables, FL 33134, USA
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Pedraza E, Brady AC, Fraker CA, Molano RD, Sukert S, Berman DM, Kenyon NS, Pileggi A, Ricordi C, Stabler CL. Macroporous three-dimensional PDMS scaffolds for extrahepatic islet transplantation. Cell Transplant 2012; 22:1123-35. [PMID: 23031502 DOI: 10.3727/096368912x657440] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Clinical islet transplantation has demonstrated success in treating type 1 diabetes. A current limitation is the intrahepatic portal vein transplant site, which is prone to mechanical stress and inflammation. Transplantation of pancreatic islets into alternative sites is preferable, but challenging, as it may require a three-dimensional vehicle to confer mechanical protection and to confine islets to a well-defined, retrievable space where islet neovascularization can occur. We have fabricated biostable, macroporous scaffolds from poly(dimethylsiloxane) (PDMS) and investigated islet retention and distribution, metabolic function, and glucose-dependent insulin secretion within these scaffolds. Islets from multiple sources, including rodents, nonhuman primates, and humans, were tested in vitro. We observed high islet retention and distribution within PDMS scaffolds, with retention of small islets (< 100 µm) improved through the postloading addition of fibrin gel. Islets loaded within PDMS scaffolds exhibited viability and function comparable to standard culture conditions when incubated under normal oxygen tensions, but displayed improved viability compared to standard two-dimensional culture controls under low oxygen tensions. In vivo efficacy of scaffolds to support islet grafts was evaluated after transplantation in the omental pouch of chemically induced diabetic syngeneic rats, which promptly achieved normoglycemia. Collectively, these results are promising in that they indicate the potential for transplanting islets into a clinically relevant, extrahepatic site that provides spatial distribution of islets as well as intradevice vascularization.
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Affiliation(s)
- Eileen Pedraza
- Diabetes Research Institute, University of Miami, Miami, FL 33136, USA
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13
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Hsu FY, Kuo KL, Liou HM. The surface immobilization of galactose ligands on a PDMS substrate for use in primary rat hepatocyte culture. J Taiwan Inst Chem Eng 2012. [DOI: 10.1016/j.jtice.2011.08.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Lippens E, De Smet N, Schauvliege S, Martens A, Gasthuys F, Schacht E, Cornelissen R. Biocompatibility properties of surface-modified poly(dimethylsiloxane) for urinary applications. J Biomater Appl 2012; 27:651-60. [PMID: 22274880 DOI: 10.1177/0885328211422119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An electronic sensor system for urinary bladder pressure monitoring requires an imbedding into a biocompatible, flexible, and liquid-impermeable material. Poly(dimethylsiloxane) (PDMS) was selected in the present set-up as packaging material because it fulfills the abovementioned requirements. However, the surface of PDMS is hydrophobic and causes undesired interactions with salts, proteins, and cells present in urine. To reduce possible interactions of urine salts in the urinary bladder, monomers, [2-(methacryloyloxy)ethyl]-dimethyl-3-sulfopropyl-ammonium hydroxide (sulfobetaine) and 2-acrylamido-2-methylpropyl sulfonic acid, were grafted onto the surface through oxygen plasma treatment. A reduction in salt deposition between the pure PDMS and the modified PDMS was observed both in vitro (artificial urine flow over the surface) and in vivo (implants into the urinary bladder of experimental pigs). Additionally, a 10-fold reduction in salt deposition was observed in vitro due to grafting of the monomers onto the surface. These modified PDMS materials proved also to be biocompatible in cell cultures, which was further confirmed by histological screening of the bladder tissue after implantation in an in vivo pig model.
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Affiliation(s)
- Evi Lippens
- Department of Basic Medical Sciences, Ghent University, Belgium
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15
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Salati A, Keshvari H, Karkhaneh A, Taranejoo S. Design and Fabrication of Artificial Skin: Chitosan and Gelatin Immobilization on Silicone by Poly Acrylic Acid Graft Using a Plasma Surface Modification Method. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2010.549438] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Amir Salati
- a Faculty of Biomedical Engineering , Amirkabir University of Technology , Tehran, Iran
| | - Hamid Keshvari
- a Faculty of Biomedical Engineering , Amirkabir University of Technology , Tehran, Iran
| | - Akbar Karkhaneh
- b Faculty of Biomedical Engineering , Islamic Azad University, Science and Research Branch , Tehran, Iran
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16
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Shourgashti Z, Khorasani M, Khosroshahi S. Plasma-induced grafting of polydimethylsiloxane onto polyurethane surface: Characterization and in vitro assay. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2010.04.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Cytotoxicity of implantable microelectrode arrays produced by laser micromachining. Biomaterials 2010; 31:886-93. [PMID: 19833388 DOI: 10.1016/j.biomaterials.2009.09.099] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Accepted: 09/29/2009] [Indexed: 11/20/2022]
Abstract
Implantable high-density microelectrode arrays have been successfully fabricated using laser micromachining of conventional implant materials, polydimethylsiloxane (PDMS) and platinum (Pt) foil. This study investigates the impact of modifying PDMS and Pt with high power laser beams and the possible toxicity of by-products that may remain on the implantable device. Materials were characterised both chemically and biologically through x-ray photoelectron spectroscopy (XPS), cell growth inhibition assays and a direct contact cell proliferation assay. It was found that laser micromachining produces oxides of silicon and platinum on the PDMS and Pt respectively. While the chemical properties of materials were altered, there was negligible change in the biological response to either extracts or cell growth directly on the composite electrode array.
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Bodas D, Rauch JY, Khan-Malek C. Surface modification and aging studies of addition-curing silicone rubbers by oxygen plasma. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.04.012] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Nair A, Zou L, Bhattacharyya D, Timmons RB, Tang L. Species and density of implant surface chemistry affect the extent of foreign body reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2015-24. [PMID: 18189430 PMCID: PMC3230931 DOI: 10.1021/la7025973] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Implant-associated fibrotic capsule formation presents a major challenge for the development of long-term drug release microspheres and implantable sensors. Since material properties have been shown to affect in vitro cellular responses and also to influence short-term in vivo tissue responses, we have thus assumed that the type and density of surface chemical groups would affect the degree of tissue responses to microsphere implants. To test this hypothesis, polypropylene particles with different surface densities of -OH and -COOH groups, along with the polypropylene control (-CH2 groups) were utilized. The influence of functional groups and their surface densities on fibrotic reactions were analyzed using a mice subcutaneous implantation model. Our comparative studies included determination and correlation of the extents of fibrotic capsule formation, cell infiltration into the particles, and recruitment of CD11b+ inflammatory cells for all of the substrates employed. We have observed major differences among microspheres coated with different surface functionalities. Surfaces with -OH surface groups trigger the strongest responses, while -COOH-rich surfaces prompt the least tissue reactions. However, variation of the surface density of either functional group has a relatively minor influence on the extent of fibrotic tissue reactions. The present results show that surface functionality can be used as a powerful tool to alter implant-associated fibrotic reactions and, potentially, to improve the efficacy and function of drug-delivery microspheres, implantable sensors, and tissue-engineering scaffolds.
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Affiliation(s)
- Ashwin Nair
- Bioengineering Department, University of Texas at Arlington, PO Box 19138, Arlington, TX 76019-0138
| | - Ling Zou
- Bioengineering Department, University of Texas at Arlington, PO Box 19138, Arlington, TX 76019-0138
| | - Dhiman Bhattacharyya
- Chemistry and Biochemistry Department, University of Texas at Arlington, PO Box 19065, Arlington, Texas 76019-0065
| | - Richard B. Timmons
- Chemistry and Biochemistry Department, University of Texas at Arlington, PO Box 19065, Arlington, Texas 76019-0065
| | - Liping Tang
- Bioengineering Department, University of Texas at Arlington, PO Box 19138, Arlington, TX 76019-0138
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Parvin A, Mirzadeh H, Khorasani MT. Physicochemical and biological evaluation of plasma-induced graft polymerization of acrylamide onto polydimethylsiloxane. J Appl Polym Sci 2007. [DOI: 10.1002/app.27281] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Karkhaneh A, Mirzadeh H, Ghaffariyeh AR. Simultaneous graft copolymerization of 2-hydroxyethyl methacrylate and acrylic acid onto polydimethylsiloxane surfaces using a two-step plasma treatment. J Appl Polym Sci 2007. [DOI: 10.1002/app.26216] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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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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Khorasani MT, Shorgashti S. Fabrication of microporous thermoplastic polyurethane for use as small-diameter vascular graft material. I. Phase-inversion method. J Biomed Mater Res B Appl Biomater 2005; 76:41-8. [PMID: 16161121 DOI: 10.1002/jbm.b.30363] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fabrication conditions of microporous thermoplastic polyurethane to be used in small-diameter vascular grafts are studied. Porosity variations due to various factors such as concentration of PU solution, composition of coagulation bath, effect of coagulant temperature, and effect of dissolved air in PU solution are discussed. The liquid-liquid phase-inversion process used for preparation of PU films and the mechanism for the formation of microporous films are discussed. Surface and cross-section morphologies of PU films are studied with the use of scanning electron microscopy (SEM), and porosity value and mechanical strength of PU films are also determined. SEM photomicrographs show that PU films prepared in an alcoholic coagulant have uniform porous structure compared to films prepared in water coagulant. Increasing the polymer concentration and coagulant temperature (>23 degrees C) decreases the macrovoid formation, as seen in cross sections of PU films. This enhances the tensile modulus of PU films. By using this process adjustment may be made on the morphology and compliance, as they are important factors in design and fabrication of small-diameter vascular grafts.
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Affiliation(s)
- M T Khorasani
- Biomaterial Department, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran.
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