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Hemocompatibility challenge of membrane oxygenator for artificial lung technology. Acta Biomater 2022; 152:19-46. [PMID: 36089235 DOI: 10.1016/j.actbio.2022.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/25/2022] [Accepted: 09/04/2022] [Indexed: 11/24/2022]
Abstract
The artificial lung (AL) technology is one of the membrane-based artificial organs that partly augments lung functions, i.e. blood oxygenation and CO2 removal. It is generally employed as an extracorporeal membrane oxygenation (ECMO) device to treat acute and chronic lung-failure patients, and the recent outbreak of the COVID-19 pandemic has re-emphasized the importance of this technology. The principal component in AL is the polymeric membrane oxygenator that facilitates the O2/CO2 exchange with the blood. Despite the considerable improvement in anti-thrombogenic biomaterials in other applications (e.g., stents), AL research has not advanced at the same rate. This is partly because AL research requires interdisciplinary knowledge in biomaterials and membrane technology. Some of the promising biomaterials with reasonable hemocompatibility - such as emerging fluoropolymers of extremely low surface energy - must first be fabricated into membranes to exhibit effective gas exchange performance. As AL membranes must also demonstrate high hemocompatibility in tandem, it is essential to test the membranes using in-vitro hemocompatibility experiments before in-vivo test. Hence, it is vital to have a reliable in-vitro experimental protocol that can be reasonably correlated with the in-vivo results. However, current in-vitro AL studies are unsystematic to allow a consistent comparison with in-vivo results. More specifically, current literature on AL biomaterial in-vitro hemocompatibility data are not quantitatively comparable due to the use of unstandardized and unreliable protocols. Such a wide gap has been the main bottleneck in the improvement of AL research, preventing promising biomaterials from reaching clinical trials. This review summarizes the current state-of-the-art and status of AL technology from membrane researcher perspectives. Particularly, most of the reported in-vitro experiments to assess AL membrane hemocompatibility are compiled and critically compared to suggest the most reliable method suitable for AL biomaterial research. Also, a brief review of current approaches to improve AL hemocompatibility is summarized. STATEMENT OF SIGNIFICANCE: The importance of Artificial Lung (AL) technology has been re-emphasized in the time of the COVID-19 pandemic. The utmost bottleneck in the current AL technology is the poor hemocompatibility of the polymer membrane used for O2/CO2 gas exchange, limiting its use in the long-term. Unfortunately, most of the in-vitro AL experiments are unsystematic, irreproducible, and unreliable. There are no standardized in-vitro hemocompatibility characterization protocols for quantitative comparison between AL biomaterials. In this review, we tackled this bottleneck by compiling the scattered in-vitro data and suggesting the most suitable experimental protocol to obtain reliable and comparable hemocompatibility results. To the best of our knowledge, this is the first review paper focusing on the hemocompatibility challenge of AL technology.
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Mani G, Porter D, Grove K, Collins S, Ornberg A, Shulfer R. A comprehensive review of biological and materials properties of Tantalum and its alloys. J Biomed Mater Res A 2022; 110:1291-1306. [PMID: 35156305 DOI: 10.1002/jbm.a.37373] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 02/04/2022] [Indexed: 12/15/2022]
Abstract
Tantalum (Ta) and its alloys have been used for various cardiovascular, orthopedic, fracture fixation, dental, and spinal fusion implants. This review evaluates the biological and material properties of Ta and its alloys. Specifically, the biological properties including hemocompatibility and osseointegration, and material properties including radiopacity, MRI compatibility, corrosion resistance, surface characteristics, semiconductivity, and mechanical properties are covered. This review highlights how the material properties of Ta and its alloys contribute to its excellent biological properties for use in implants and medical devices.
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Affiliation(s)
- Gopinath Mani
- Division of Science and Technology, Abbott, St. Paul, Minnesota, USA
| | - Deanna Porter
- Division of Science and Technology, Abbott, St. Paul, Minnesota, USA
| | - Kent Grove
- Division of Science and Technology, Abbott, St. Paul, Minnesota, USA
| | - Shell Collins
- Division of Science and Technology, Abbott, St. Paul, Minnesota, USA
| | - Andreas Ornberg
- Division of Science and Technology, Abbott, St. Paul, Minnesota, USA
| | - Robert Shulfer
- Division of Science and Technology, Abbott, St. Paul, Minnesota, USA
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The Effect of Ultraviolet Treatment on TiO2 Nanotubes: A Study of Surface Characteristics, Bacterial Adhesion, and Gingival Fibroblast Response. METALS 2022. [DOI: 10.3390/met12010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Titanium dioxide (TiO2) nanotubes are emerging as a provocative target for oral implant research. The aim of this study was to evaluate the effect of UV on the wettability behavior, bacterial colonization, and fibroblast proliferation rate of TiO2 nanotube surfaces prepared using different anodization voltages and aimed for use as implant abutment materials. Four different experimental materials were prepared: (1) TiO2 nanotube 10 V; (2) TiO2 nanotube 15 V; (3) TiO2 nanotube 20 V; and (4) commercial pure titanium as a control group. TiO2 nanotube arrays were prepared in an aqueous electrolyte solution of hydrofluoric acid (HF, 0.5 vol.%). Different anodization voltages were used to modify the morphology of the TiO2 nanotubes. Equilibrium contact angles were measured using the sessile drop method with a contact angle meter. The investigated surfaces (n = 3) were incubated at 37 °C in a suspension of Streptococcus mutans (S. mutans) for 30 min for bacterial adhesion and 3 days for biofilm formation. Human gingival fibroblasts were plated and cultured on the experimental substrates for up to 7 days and the cell proliferation rate was assessed using the AlamarBlue assayTM (BioSource International, Camarillo, CA, USA). The data were analyzed using one-way ANOVA followed by Tukey’s post-hoc test. Water contact angle measurements on the TiO2 after UV treatment showed an overall hydrophilic behavior regardless of the anodization voltage. The ranking of the UV-treated surfaces of experimental groups from lowest to highest for bacterial adhesion was: TiO2 nanotube 20 V < Ti and TiO2 nanotube 15 V < TiO2 nanotube 10 V (p < 0.05), and for bacterial biofilm formation was: TiO2 nanotube 20 V-TiO2 nanotube 10 V < Ti-TiO2 nanotube 15 V (p < 0.05). Fibroblast cell proliferation was lower on TiO2 nanotube surfaces throughout the incubation period and UV light treatment showed no enhancement in cellular response. UV treatment enhances the wettability behavior of TiO2 nanotube surfaces and could result in lower bacterial adhesion and biofilm formation.
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Booth MA, Pope L, Sherrell PC, Stacey A, Tran PA, Fox KE. Polycrystalline diamond coating on 3D printed titanium scaffolds: Surface characterisation and foreign body response. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 130:112467. [PMID: 34702542 DOI: 10.1016/j.msec.2021.112467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/10/2021] [Accepted: 09/27/2021] [Indexed: 11/16/2022]
Abstract
Titanium-based implants are the leading material for orthopaedic surgery, due to their strength, versatility, fabrication via additive manufacturing and invoked biological response. However, the interface between the implant and the host tissue requires improvement to better integrate the implant material and mitigate foreign body response. The interface can be manipulated by changing the surface energy, chemistry, and topography of the Titanium-based implant. Recently, polycrystalline diamond (PCD) has emerged as an exciting coating material for 3D printed titanium scaffolds showing enhanced mammalian cell functions while inhibiting bacterial attachment in vitro. In this study, we performed in-depth characterisation of PCD coatings investigating the surface topography, thickness, surface energy, and compared its foreign body response in vivo with uncoated titanium scaffold. Coating PCD onto titanium scaffolds resulted in a similar microscale surface roughness (RMS(PCD-coated) = 24 μm; RMS(SLM-Ti) = 28 μm), increased nanoscale roughness (RMS(PCD-coated) = 35 nm; RMS(SLM-Ti) = 66 nm) and a considerable decrease in surface free energy (E(PCD-coated) = 4 mN m-1; E(SLM-Ti) = 16 mN m-1). These surface property changes were supported by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy as corresponding to observed surface chemistry changes induced by the coating. The underlying mechanism of how the diamond coatings chemical and physical properties changes the wettability of implants was examined. In vivo, the coated scaffolds induced similar level of fibrous encapsulation with uncoated scaffolds. This study thus provides further insight into the physicochemical characteristics of PCD coatings, adding evidence to the promising potential of PCD-coatings of medical implants.
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Affiliation(s)
- Marsilea A Booth
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia
| | - Leon Pope
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia
| | - Peter C Sherrell
- Department of Chemical Engineering, The Faculty of Engineering and Information Technology, University of Melbourne, Australia
| | - Alastair Stacey
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia; ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, VIC 3000, Australia
| | - Phong A Tran
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia; Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Kate E Fox
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia.
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Metavarayuth K, Villarreal E, Wang H, Wang Q, Hw, Qw, Mk, Ev, Mk, Mk, Hw, Qw, Mk, Hw, Qw. Surface topography and free energy regulate osteogenesis of stem cells: effects of shape-controlled gold nanoparticles. BIOMATERIALS TRANSLATIONAL 2021; 2:165-173. [PMID: 35836962 PMCID: PMC9255781 DOI: 10.12336/biomatertransl.2021.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/09/2021] [Indexed: 01/16/2023]
Abstract
The surface free energy of a biomaterial plays an important role in the early stages of cell-biomaterial interactions, profoundly influencing protein adsorption, interfacial water accessibility, and cell attachment on the biomaterial surface. Although multiple approaches have been developed to engineer the surface free energy of biomaterials, systematically tuning their surface free energy without altering other physicochemical properties remains challenging. In this study, we constructed an array of chemically-equivalent surfaces with comparable apparent roughness through assembly of gold nanoparticles adopting various geometrically-distinct shapes but all capped with the same surface ligand, (1-hexadecyl)trimethylammonium chloride, on cell culture substrates. We found that bone marrow stem cells exhibited distinct osteogenic differentiation behaviours when interacting with different types of substrates comprising shape-controlled gold nanoparticles. Our results reveal that bone marrow stem cells are capable of sensing differences in the nanoscale topographical features, which underscores the role of the surface free energy of nanostructured biomaterials in regulating cell responses. The study was approved by Institutional Animal Care and Use Committee, School of Medicine, University of South Carolina.
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Rahmati M, Silva EA, Reseland JE, A Heyward C, Haugen HJ. Biological responses to physicochemical properties of biomaterial surface. Chem Soc Rev 2020; 49:5178-5224. [PMID: 32642749 DOI: 10.1039/d0cs00103a] [Citation(s) in RCA: 137] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Biomedical scientists use chemistry-driven processes found in nature as an inspiration to design biomaterials as promising diagnostic tools, therapeutic solutions, or tissue substitutes. While substantial consideration is devoted to the design and validation of biomaterials, the nature of their interactions with the surrounding biological microenvironment is commonly neglected. This gap of knowledge could be owing to our poor understanding of biochemical signaling pathways, lack of reliable techniques for designing biomaterials with optimal physicochemical properties, and/or poor stability of biomaterial properties after implantation. The success of host responses to biomaterials, known as biocompatibility, depends on chemical principles as the root of both cell signaling pathways in the body and how the biomaterial surface is designed. Most of the current review papers have discussed chemical engineering and biological principles of designing biomaterials as separate topics, which has resulted in neglecting the main role of chemistry in this field. In this review, we discuss biocompatibility in the context of chemistry, what it is and how to assess it, while describing contributions from both biochemical cues and biomaterials as well as the means of harmonizing them. We address both biochemical signal-transduction pathways and engineering principles of designing a biomaterial with an emphasis on its surface physicochemistry. As we aim to show the role of chemistry in the crosstalk between the surface physicochemical properties and body responses, we concisely highlight the main biochemical signal-transduction pathways involved in the biocompatibility complex. Finally, we discuss the progress and challenges associated with the current strategies used for improving the chemical and physical interactions between cells and biomaterial surface.
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Affiliation(s)
- Maryam Rahmati
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway. h.j.haugen.odont.uio.no
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Sarode DN, Roy S. In Vitro models for thrombogenicity testing of blood-recirculating medical devices. Expert Rev Med Devices 2019; 16:603-616. [PMID: 31154869 DOI: 10.1080/17434440.2019.1627199] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Blood-recirculating medical devices, such as mechanical circulatory support (MCS), extracorporeal membrane oxygenators (ECMO), and hemodialyzers, are commonly used to treat or improve quality of life in patients with cardiac, pulmonary, and renal failure, respectively. As part of their regulatory approval, guidelines for thrombosis evaluation in pre-clinical development have been established. In vitro testing evaluates a device's potential to produce thrombosis markers in static and dynamic flow loops. AREAS COVERED This review focuses on in vitro static and dynamic models to assess thrombosis in blood-recirculating medical devices. A summary of key devices is followed by a review of molecular markers of contact activation. Current thrombosis testing guidance documents, ISO 10993-4, ASTM F-2888, and F-2382 will be discussed, followed by analysis of their application to in vitro testing models. EXPERT OPINION In general, researchers have favored in vivo models to thoroughly evaluate thrombosis, limiting in vitro evaluation to hemolysis. In vitro studies are not standardized and it is often difficult to compare studies on similar devices. As blood-recirculating devices have advanced to include wearable and implantable artificial organs, expanded guidelines standardizing in vitro testing are needed to identify the thrombotic potential without excessive use of in vivo resources during pre-clinical development.
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Affiliation(s)
- Deepika N Sarode
- a Department of Bioengineering and Therapeutic Sciences , University of California , San Francisco , CA , USA
| | - Shuvo Roy
- a Department of Bioengineering and Therapeutic Sciences , University of California , San Francisco , CA , USA
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do Nascimento RM, Sarig U, da Cruz NC, de Carvalho VR, Eyssartier C, Siad L, Ganghoffer J, Hernandes AC, Rahouadj R. Optimized‐Surface Wettability: A New Experimental 3D Modeling Approach Predicting Favorable Biomaterial–Cell Interactions. ADVANCED THEORY AND SIMULATIONS 2019. [DOI: 10.1002/adts.201900079] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Rodney Marcelo do Nascimento
- São Carlos Institute of PhysicsUniversity of São Paulo USP 13566‐590 Brazil
- Laboratoire d'Etude des Microstructures et de Mécanique des MatériauxLEM3 UMR CNRS 7239University of Lorraine Nancy‐Metz 57070 France
- Departamento de FisicaUniversidade Federal de Santa CatarinaCampus Reitor Joao David Ferreira Lima, s/n, Trindade Florianopolis 88040‐900 Brazil
| | - Udi Sarig
- Biotechnology & Food EngineeringTechnion – Israel Institute of Technology 32000 Haifa Israel
- Biotechnology & Food EngineeringGuangdong‐Technion Israel Institute of Technology 515063 Shantou Guangdong Province P. R. China
| | | | | | - Camille Eyssartier
- Ecole Nationale Supérieure des Mines de Nancy Campus Artem – CS 14 234, 92 France
| | - Larbi Siad
- Biomatériaux et inflammation en site osseuxBIOSUniversité de Reims EA 4691 CNRS 51095 France
| | - Jean‐François Ganghoffer
- Laboratoire d'Etude des Microstructures et de Mécanique des MatériauxLEM3 UMR CNRS 7239University of Lorraine Nancy‐Metz 57070 France
| | | | - Rachid Rahouadj
- Laboratoire d'Etude des Microstructures et de Mécanique des MatériauxLEM3 UMR CNRS 7239University of Lorraine Nancy‐Metz 57070 France
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De Paula MMM, Bassous NJ, Afewerki S, Harb SV, Ghannadian P, Marciano FR, Viana BC, Tim CR, Webster TJ, Lobo AO. Understanding the impact of crosslinked PCL/PEG/GelMA electrospun nanofibers on bactericidal activity. PLoS One 2018; 13:e0209386. [PMID: 30571704 PMCID: PMC6301679 DOI: 10.1371/journal.pone.0209386] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/28/2018] [Indexed: 12/14/2022] Open
Abstract
Herein, we report the design of electrospun ultrathin fibers based on the combination of three different polymers polycaprolactone (PCL), polyethylene glycol (PEG), and gelatin methacryloyl (GelMA), and their potential bactericidal activity against three different bacteria Staphylococcus aureus (S. aureus), Pseudomonas aeruginosa (P. aeruginosa), and Methicillin-resistant Staphylococcus aureus (MRSA). We evaluated the morphology, chemical structure and wettability before and after UV photocrosslinking of the produced scaffolds. Results showed that the developed scaffolds presented hydrophilic properties after PEG and GelMA incorporation. Moreover, they were able to significantly reduce gram-positive, negative, and MRSA bacteria mainly after UV photocrosslinking (PCL:PEG:GelMa-UV). Furthermore, we performed a series of study for gaining a better mechanistic understanding of the scaffolds bactericidal activity through protein adsorption study and analysis of the reactive oxygen species (ROS) levels. Furthermore, the in vivo subcutaneous implantation performed in rats confirmed the biocompatibility of our designed scaffolds.
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Affiliation(s)
- Mirian Michelle Machado De Paula
- Faculty of Medical Sciences, State University of Campinas, Campinas, São Paulo, Brazil
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, United States of America
| | - Nicole Joy Bassous
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, United States of America
| | - Samson Afewerki
- Department of Chemical Engineering and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- Division of Gastroenterology, Brigham and Women´s Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Samarah Vargas Harb
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, United States of America
- Institute of Chemistry, UNESP-São Paulo State University, Araraquara, São Paulo, Brazil
| | - Paria Ghannadian
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, United States of America
| | - Fernanda Roberta Marciano
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, United States of America
- Institute of Science and Technology, Brasil University, São Paulo, SP, Brazil
| | - Bartolomeu Cruz Viana
- LIMAV-Interdisciplinary Laboratory for Advanced Materials, PPGCM-Materials Science and Engineering graduate program, UFPI-Federal University of Piauí, Teresina, PI, Brazil
- Department of Physics, UFPI-Federal University of Piauí, Teresina, PI, Brazil
| | - Carla Roberta Tim
- Institute of Science and Technology, Brasil University, São Paulo, SP, Brazil
| | - Thomas Jay Webster
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts, United States of America
| | - Anderson Oliveira Lobo
- Faculty of Medical Sciences, State University of Campinas, Campinas, São Paulo, Brazil
- Institute of Science and Technology, Brasil University, São Paulo, SP, Brazil
- LIMAV-Interdisciplinary Laboratory for Advanced Materials, PPGCM-Materials Science and Engineering graduate program, UFPI-Federal University of Piauí, Teresina, PI, Brazil
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
- * E-mail: ,
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Borghi FF, Bean PA, Evans MDM, van der Laan T, Kumar S, Ostrikov K. Nanostructured Graphene Surfaces Promote Different Stages of Bone Cell Differentiation. NANO-MICRO LETTERS 2018; 10:47. [PMID: 30393696 PMCID: PMC6199093 DOI: 10.1007/s40820-018-0198-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
Nanostructured graphene films were used as platforms for the differentiation of Saos-2 cells into bone-like cells. The films were grown using the plasma-enhanced chemical vapor deposition method, which allowed the production of both vertically and horizontally aligned carbon nanowalls (CNWs). Modifications of the technique allowed control of the density of the CNWs and their orientation after the transfer process. The influence of two different topographies on cell attachment, proliferation, and differentiation was investigated. First, the transferred graphene surfaces were shown to be noncytotoxic and were able to support cell adhesion and growth for over 7 days. Second, early cell differentiation (identified by cellular alkaline phosphatase release) was found to be enhanced on the horizontally aligned CNW surfaces, whereas mineralization (identified by cellular calcium production), a later stage of bone cell differentiation, was stimulated by the presence of the vertical CNWs on the surfaces. These results show that the graphene coatings, grown using the presented method, are biocompatible. And their topographies have an impact on cell behavior, which can be useful in tissue engineering applications.
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Affiliation(s)
- F F Borghi
- Plasma Nanoscience, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia
- CSIRO Manufacturing, P.O. Box 52, North Ryde, NSW, 2113, Australia
- Brazilian Centre for Physics Research (CBPF), Rua Dr. Xavier Sigaud - 150, Urca, Rio de Janeiro, RJ, CEP 22290180, Brazil
| | - P A Bean
- CSIRO Manufacturing, P.O. Box 52, North Ryde, NSW, 2113, Australia
| | - M D M Evans
- CSIRO Manufacturing, P.O. Box 52, North Ryde, NSW, 2113, Australia
| | - T van der Laan
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW, 2070, Australia
| | - S Kumar
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW, 2070, Australia
| | - K Ostrikov
- Plasma Nanoscience, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia.
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia.
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW, 2070, Australia.
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In situ examination of osteoblast biomineralization on sulfonated polystyrene-modified substrates using Fourier transform infrared microspectroscopy. Biointerphases 2017; 12:031001. [PMID: 28693327 DOI: 10.1116/1.4992137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Osteoporosis is a skeletal disorder that is characterized by the loss of bone mineral density (BMD) resulting in increased risk of fracture. However, it has been shown that BMD is not the only indicator of fracture risk, as the strength of bone depends on a number of factors, including bone mass, architecture and material properties. Physiological mineral deposition requires the formation of a properly developed extracellular matrix (ECM), which recruits calcium and phosphate ions into the synthesis of apatite crystals. Temporal and spatial compositional and structural changes of biological apatite greatly depend on the properties of the crystals initially formed. As such, Fourier-transform infrared microspectroscopy (FTIRM) is capable of examining adaptive remodeling by providing compositional information such as the level of mineralization and carbonate substitution, as well as quality and perfection of the mineral phase. The objective of this study was to evaluate the in vitro mineralization development of MC3T3-E1 murine calvarial preosteoblasts cultured on different substrata by comparing FTIRM measurements from two subclones (mineralizing subclone 4 and nonmineralizing subclone 24) maintained in culture for up to 21 days. The results showed that modulation of the substrate surface using a thin coating of sulfonated polystyrene (SPS) provided favorable conditions for the development of a mineralizable ECM and that the mineral formed by the osteoblasts was similar to that of fully mineralized bone tissue. Specifically, the mineralizing subclone produced significantly more mineral phosphate when cultured on SPS-coated substrates for 21 days, compared to the same culture on bare substrates. In contrast, the level of mineralization in nonmineralizing subclone was low on both SPS-coated and uncoated substrates. The mineralizing subclone also produced comparable amounts of collagen on both substrates; however, mineralization was significantly higher in the SPS culture. The nonmineralizing subclone produced comparable amounts of collagen on day 1 but much less on day 21. Collagen maturity ratio increased in the mineralizing subclone from day 1 to day 21, but remained unchanged in the nonmineralizing subclone. These results suggest that SPS-treatment of the substrate surface may alter collagen remodeling; however, other factors may also influence osteoblast mineralization in the long term.
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Santander-Borrego M, Taran E, Shadforth AMA, Whittaker AK, Chirila TV, Blakey I. Hydrogels with Lotus Leaf Topography: Investigating Surface Properties and Cell Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:485-493. [PMID: 28054787 DOI: 10.1021/acs.langmuir.6b03547] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interactions of cells with the surface of materials is known to be influenced by a range of factors that include chemistry and roughness; however, it is often difficult to probe these factors individually without also changing the others. Here we investigate the role of roughness on cell adhesion while maintaining the same underlying chemistry. This was achieved by using a polymerization in mold technique to prepare poly(hydroxymethyl methacrylate) hydrogels with either a flat topography or a topography that replicated the microscale features of lotus leaves. These materials were then assessed for cell adhesion, and atomic force microscopy and contact angle analysis were then used to probe the physical reasons for the differing behavior in relation to cell adhesion.
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Affiliation(s)
- Miriem Santander-Borrego
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
| | - Elena Taran
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Australian National Fabrication Facility-Queensland Node , St. Lucia, Queensland 4072, Australia
| | - Audra M A Shadforth
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
| | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Centre for Advanced Imaging, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
| | - Traian V Chirila
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Faculty of Medicine and Biomedical Sciences, The University of Queensland , Herston Road, Herston, Queensland 4029, Australia
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
- Science & Engineering Faculty, Queensland University of Technology , 2 George Street Brisbane, Queensland 4001, Australia
- Faculty of Science, The University of Western Australia , Crawley, Western Australia 6009, Australia
| | - Idriss Blakey
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Centre for Advanced Imaging, The University of Queensland , St. Lucia, Queensland 4072, Australia
- Queensland Eye Institute , 140 Melbourne Street, South Brisbane, Queensland 4101, Australia
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Huang Q, Antensteiner M, Liu XY, Lin C, Vogler EA. Graphical analysis of mammalian cell adhesion in vitro. Colloids Surf B Biointerfaces 2016; 148:211-219. [PMID: 27606494 DOI: 10.1016/j.colsurfb.2016.07.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/06/2016] [Accepted: 07/09/2016] [Indexed: 11/27/2022]
Abstract
Short-term (<2h) cell adhesion kinetics of 3 different mammalian cell types: MDCK (epithelioid), MC3T3-E1 (osteoblastic), and MDA-MB-231 (cancerous) on 7 different substratum surface chemistries spanning the experimentally-observable range of water wettability (surface energy) are graphically analyzed to qualitatively elucidate commonalities and differences among cell/surface/suspending media combinations. We find that short-term mammalian cell attachment/adhesion in vitro correlates with substratum surface energy as measured by water adhesion tension, τ≡γlvcosθ, where γlv is water liquid-vapor interfacial energy (72.8 mJ/m2) and cosθ is the cosine of the advancing contact angle subtended by a water droplet on the substratum surface. No definitive functional relationships among cell-adhesion kinetic parameters and τ were observed as in previous work, but previously-observed general trends were reproduced, especially including a sharp transition in the magnitude of kinetic parameters from relatively low-to-high near τ=0mJ/m2, although the exact adhesion tension at which this transition occurs is difficult to accurately estimate from the current data set. We note, however, that the transition is within the hydrophobic range based on the τ=30mJ/m2 surface-energetic dividing line that has been proposed to differentiate "hydrophobic" surfaces from "hydrophilic". Thus, a rather sharp hydrophobic/hydrophilic contrast is observed for cell adhesion for disparate cell/surface combinations.
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Affiliation(s)
- Qiaoling Huang
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen 361005, China.
| | - Martin Antensteiner
- Departments of Materials Science and Engineering and Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Xiang Yang Liu
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore, Singapore; Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen 361005, China.
| | - Changjian Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Erwin A Vogler
- Departments of Materials Science and Engineering and Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA.
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Kaur G, Pickrell G, Sriranganathan N, Kumar V, Homa D. Review and the state of the art: Sol-gel and melt quenched bioactive glasses for tissue engineering. J Biomed Mater Res B Appl Biomater 2015; 104:1248-75. [PMID: 26060931 DOI: 10.1002/jbm.b.33443] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/19/2015] [Accepted: 04/14/2015] [Indexed: 01/26/2023]
Abstract
Biomaterial development is currently the most active research area in the field of biomedical engineering. The bioglasses possess immense potential for being the ideal biomaterials due to their high adaptiveness to the biological environment as well as tunable properties. Bioglasses like 45S5 has shown great clinical success over the past 10 years. The bioglasses like 45S5 were prepared using melt-quenching techniques but recently porous bioactive glasses have been derived through sol-gel process. The synthesis route exhibits marked effect on the specific surface area, as well as degradability of the material. This article is an attempt to provide state of the art of the sol-gel and melt quenched bioactive bioglasses for tissue regeneration. Fabrication routes for bioglasses suitable for bone tissue engineering are highlighted and the effect of these fabrication techniques on the porosity, pore-volume, mechanical properties, cytocompatibilty and especially apatite layer formation on the surface of bioglasses is analyzed in detail. Drug delivery capability of bioglasses is addressed shortly along with the bioactivity of mesoporous glasses. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1248-1275, 2016.
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Affiliation(s)
- Gurbinder Kaur
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA.,School of Physics & Materials Science, Thapar University, Patiala, 147004, India
| | - Gary Pickrell
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA
| | - Nammalwar Sriranganathan
- Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA
| | - Vishal Kumar
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA.,Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, India
| | - Daniel Homa
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA
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Premnath P, Venkatakrishnan K, Tan B. Programming cancer through phase-functionalized silicon based biomaterials. Sci Rep 2015; 5:10826. [PMID: 26043430 PMCID: PMC4455305 DOI: 10.1038/srep10826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/17/2015] [Indexed: 11/09/2022] Open
Abstract
Applications of biomaterials in cancer therapy has been limited to drug delivery systems and markers in radiation therapy. In this article, we introduce the concept of phase-functionalization of silicon to preferentially select cancer cell populations for survival in a catalyst and additive free approach. Silicon is phase-functionalized by the interaction of ultrafast laser pulses, resulting in the formation of rare phases of SiO2 in conjunction with differing silicon crystal lattices. The degree of phase-functionalization is programmed to dictate the degree of repulsion of cancer cells. Unstable phases of silicon oxides are synthesized during phase-functionalization and remain stable at ambient conditions. This change in phase of silicon as well as formation of oxides contributes to changes in surface chemistry as well as surface energy. These material properties elicit in precise control of migration, cytoskeleton shape, direction and population. To the best of our knowledge, phase-functionalized silicon without any changes in topology or additive layers and its applications in cancer therapy has not been reported before. This unique programmable phase-functionalized silicon has the potential to change current trends in cancer research and generate focus on biomaterials as cancer repelling or potentially cancer killing surfaces.
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Affiliation(s)
- Priyatha Premnath
- Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto M5B2K3
| | - Krishnan Venkatakrishnan
- Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto M5B2K3
| | - Bo Tan
- Department of Aerospace Engineering, Ryerson University, 350 Victoria Street, Toronto M5B2K3
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Siqueira IAWB, Corat MAF, Cavalcanti BDN, Ribeiro Neto WA, Martin AA, Bretas RES, Marciano FR, Lobo AO. In Vitro and in Vivo Studies of Novel Poly(D,L-lactic acid), Superhydrophilic Carbon Nanotubes, and Nanohydroxyapatite Scaffolds for Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2015; 7:9385-9398. [PMID: 25899398 DOI: 10.1021/acsami.5b01066] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Poly(D,L-lactide acid, PDLLA) has been researched for scaffolds in bone regeneration. However, its hydrophobocity and smooth surface impedes its interaction with biological fluid and cell adhesion. To alter the surface characteristics, different surface modification techniques have been developed to facilitate biological application. The present study compared two different routes to produce PDLLA/superhydrophilic vertically aligned carbon nanotubes:nanohydroxyapatite (PDLLA/VACNT-O:nHAp) scaffolds. For this, we used electrodeposition and immersion in simulated body fluid (SBF). Characterization by goniometry, scanning electron microscopy, X-ray diffraction, and infrared spectroscopy confirmed the polymer modifications, the in vitro bioactivity, and biomineralization. Differential scanning calorimetry and thermal gravimetric analyses showed that the inclusion of VACNT-O:nHA probably acts as a nucleating agent increasing the crystallization rate in the neat PDLLA without structural alteration. Our results showed the formation of a dense nHAp layer on all scaffolds after 14 days of immersion in SBF solution; the most intense carbonated nHAp peaks observed in the PDLLA/VACNT-O:nHAp samples suggest higher calcium precipitation compared to the PDLLA control. Both cell viability and alkaline phosphatase assays showed favorable results, because no cytotoxic effects were present and all produced scaffolds were able to induce detectable mineralization. Bone defects were used to evaluate the bone regeneration; the confocal Raman and histological results confirmed high potential for bone applications. In vivo study showed that the PDLLA/VACNT-O:nHAp scaffolds mimicked the immature bone and induced bone remodeling. These findings indicate surface improvement and the applicability of this new nanobiomaterial for bone regenerative medicine.
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Affiliation(s)
| | - Marcus Alexandre F Corat
- ‡Multidisciplinary Center for Biological Investigation on Laboratory Animal Science (CEMIB), State University of Campinas, Campinas SP 13083-970, Sao Paulo, Brazil
| | - Bruno das Neves Cavalcanti
- §Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Wilson Alves Ribeiro Neto
- ∥Department of Materials Engineering, Federal University of Sao Carlos, Sao Carlos SP 13565-905, Sao Paulo, Brazil
| | | | - Rosario Elida Suman Bretas
- ∥Department of Materials Engineering, Federal University of Sao Carlos, Sao Carlos SP 13565-905, Sao Paulo, Brazil
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Ellis CE, Ellis LK, Korbutt RS, Suuronen EJ, Korbutt GS. Development and Characterization of a Collagen-Based Matrix for Vascularization and Cell Delivery. Biores Open Access 2015; 4:188-97. [PMID: 26309795 PMCID: PMC4497631 DOI: 10.1089/biores.2015.0007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Since the development of the Edmonton protocol, islet transplantation is increasingly encouraging as a treatment for type 1 diabetes. Strategies to ameliorate problems with the intraportal site include macroencapsulating the islets in diverse biomaterials. Characterization of these biomaterials is important to optimally tune the properties to support islets and promote vascularization. In this study, we characterize the cross-linker-dependent properties of collagen-based matrices containing chondroitin-6-sulfate, chitosan, and laminin, cross-linked with 7.5, 30, or 120 mM of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide. The swelling ratio was found to be significantly negatively correlated with increasing cross-linker concentrations (p<0.0001; R2=0.718). The matrix released insulin in a reproducible logarithmic manner (R2 of 0.99 for all concentrations), demonstrating cross-linker-dependent control of drug release. The matrices with the highest cross-linker concentrations resisted degradation by collagenase for longer than the lowest concentrations (58.13%±2.22% vs. 13.69%±7.67%; p<0.05). Scanning electron microscopy images of the matrices revealed that the matrices had uniform topography and porosity, indicating efficient cross-linking and incorporation of the polymer components. Matrices were transplanted subcutaneously in naive BALB/c mice, and the number and size of vessels were quantified using von Willebrand factor staining; matrices with higher cross-linking concentrations had significantly larger capillaries at every time point up to 4 weeks after transplantation compared to the lowest cross-linker concentration group. CD31 staining visualized the capillaries at each time point. Taken together, these data show that this collagen-based matrix is reproducible with cross-linking-dependent properties that can be optimized to support vascularization and islet function.
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Affiliation(s)
- Cara E Ellis
- Department of Surgery, University of Alberta , Edmonton, Canada . ; Alberta Diabetes Institute, University of Alberta , Edmonton, Canada
| | - Laura K Ellis
- Department of Surgery, University of Alberta , Edmonton, Canada . ; Alberta Diabetes Institute, University of Alberta , Edmonton, Canada
| | - Ryan S Korbutt
- Department of Surgery, University of Alberta , Edmonton, Canada . ; Alberta Diabetes Institute, University of Alberta , Edmonton, Canada
| | - Erik J Suuronen
- Division of Cardiac Surgery, University of Ottawa Heart Institute , Ottawa, Canada
| | - Gregory S Korbutt
- Department of Surgery, University of Alberta , Edmonton, Canada . ; Alberta Diabetes Institute, University of Alberta , Edmonton, Canada
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Bykova I, Weinhardt V, Kashkarova A, Lebedev S, Baumbach T, Pichugin V, Zaitsev K, Khlusov I. Physical properties and biocompatibility of UHMWPE-derived materials modified by synchrotron radiation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:1843-1852. [PMID: 24793194 PMCID: PMC4099527 DOI: 10.1007/s10856-014-5222-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 04/19/2014] [Indexed: 06/03/2023]
Abstract
The applications of synchrotron radiation (SR) in medical imaging have become of great use, particularly in angiography, bronchography, mammography, computed tomography, and X-ray microscopy. Thanks to recently developed phase contrast imaging techniques non-destructive preclinical testing of low absorbing materials such as polymers has become possible. The focus of the present work is characterization and examination of UHMWPE-derived materials widely used in medicine, before and after their exposure to SR during such testing. Physical properties, such as wettability, surface energy, IR-spectroscopy, roughness, optical microscopy, microhardness measurements of UHMWPE samples were studied before and after SR. The relationship between a growth of UHMWPE surface hydrophilicity after SR and surface colonization by stromal cells was studied in vitro. Obtained results demonstrate that SR may be used as prospective direction to examine bulk (porous) structure of polymer materials and/or to modify polymer surface and volume for tissue engineering.
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Affiliation(s)
- Iu Bykova
- Tomsk Polytechnic University, Lenin Ave. 30, 634050, Tomsk, Russia,
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Abdulmajeed AA, Kokkari AK, Käpylä J, Massera J, Hupa L, Vallittu PK, Närhi TO. In vitro blood and fibroblast responses to BisGMA-TEGDMA/bioactive glass composite implants. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:151-162. [PMID: 24022800 DOI: 10.1007/s10856-013-5040-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 08/27/2013] [Indexed: 06/02/2023]
Abstract
This in vitro study was designed to evaluate both blood and human gingival fibroblast responses to bisphenol A-glycidyl methacrylate-triethyleneglycol dimethacrylate (BisGMA-TEGDMA)/bioactive glass (BAG) composite, aimed to be used as composite implant abutment surface modifier. Three different types of substrates were investigated: (a) plain polymer (BisGMA 50 wt%-TEGDMA 50 wt%), (b) BAG-composite (50 wt% polymer + 50 wt% fraction of BAG-particles, <50 μm), and (c) plain BAG plates (100 wt% BAG). The blood response, including the blood-clotting ability and platelet adhesion morphology were evaluated. Human gingival fibroblasts were plated and cultured on the experimental substrates for up to 10 days, then the cell proliferation rate was assessed using AlamarBlue assay™. The BAG-composite and plain BAG substrates had a shorter clotting time than plain polymer substrates. Platelet activation and aggregation were most extensive, qualitatively, on BAG-composite. Analysis of the normalized cell proliferation rate on the different surfaces showed some variations throughout the experiment, however, by day 10 the BAG-composite substrate showed the highest (P < 0.001) cell proliferation rate. In conclusion, the presence of exposed BAG-particles enhances fibroblast and blood responses on composite surfaces in vitro.
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20
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Abdulmajeed AA, Walboomers XF, Massera J, Kokkari AK, Vallittu PK, Närhi TO. Blood and fibroblast responses to thermoset BisGMA-TEGDMA/glass fiber-reinforced composite implants in vitro. Clin Oral Implants Res 2013; 25:843-51. [PMID: 23590531 DOI: 10.1111/clr.12151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVES This in vitro study was designed to evaluate both blood and human gingival fibroblast responses on fiber-reinforced composite (FRC) aimed to be used as oral implant abutment material. MATERIAL AND METHODS Two different types of substrates were investigated: (a) Plain polymer (BisGMA 50%-TEGDMA 50%) and (b) FRC. The average surface roughness (Ra) was measured using spinning-disk confocal microscope. The phase composition was identified using X-ray diffraction analyzer. The degree of monomer conversion (DC%) was determined using FTIR spectrometry. The blood response, including the blood-clotting ability and platelet adhesion morphology, was evaluated. Fibroblast cell responses were studied in cell culture environment using routine test conditions. RESULTS The Ra of the substrates investigated was less than 0.1 μm with no signs of surface crystallization. The DC% was 89.1 ± 0.5%. The FRC substrates had a shorter clotting time and higher platelets activation state than plain polymer substrates. The FRC substrates showed higher (P < 0.01-0.001) amount of adhered cells than plain polymer substrates at all time points investigated. The strength of attachment was evaluated using serial trypsinization, the number of cells detached from FRC substrates was 59 ± 5%, whereas those detached from the plane polymer substrates was 70 ± 5%, indicating a stronger (P < 0.01) cell attachment on the FRC surfaces. Fibroblasts grew more efficiently on FRC than on plain polymer substrates, showing significantly higher (P < 0.01) cell metabolic activities throughout the experiment. CONCLUSIONS The presence of E-glass fibers enhances blood and fibroblast responses on composite surfaces in vitro.
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Affiliation(s)
- Aous A Abdulmajeed
- Department of Prosthetic Dentistry, Institute of Dentistry, University of Turku, Turku, Finland; Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku, Finland; Finnish Doctoral Program in Oral Sciences-FINDOS, Institute of Dentistry, University of Turku, Turku, Finland
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Parikh K, Rao S, Ansari H, Zimmerman L, Lee L, Akbar S, Winter J. Ceramic nanopatterned surfaces to explore the effects of nanotopography on cell attachment. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.07.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Antonioli E, Lobo AO, Ferretti M, Cohen M, Marciano FR, Corat EJ, Trava-Airoldi VJ. An evaluation of chondrocyte morphology and gene expression on superhydrophilic vertically-aligned multi-walled carbon nanotube films. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 33:641-7. [PMID: 25427468 DOI: 10.1016/j.msec.2012.10.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 10/03/2012] [Accepted: 10/26/2012] [Indexed: 12/18/2022]
Abstract
Cartilage serves as a low-friction and wear-resistant articulating surface in diarthrodial joints and is also important during early stages of bone remodeling. Recently, regenerative cartilage research has focused on combinations of cells paired with scaffolds. Superhydrophilic vertically aligned carbon nanotubes (VACNTs) are of particular interest in regenerative medicine. The aim of this study is to evaluate cell expansion of human articular chondrocytes on superhydrophilic VACNTs, as well as their morphology and gene expression. VACNT films were produced using a microwave plasma chamber on Ti substrates and submitted to an O2 plasma treatment to make them superhydrophilic. Human chondrocytes were cultivated on superhydrophilic VACNTs up to five days. Quantitative RT-PCR was performed to measure type I and type II Collagen, Sox9, and Aggrecan mRNA expression levels. The morphology was analyzed by scanning electron microscopy (SEM) and confocal microscopy. SEM images demonstrated that superhydrophilic VACNTs permit cell growth and adhesion of human chondrocytes. The chondrocytes had an elongated morphology with some prolongations. Chondrocytes cultivated on superhydrophilic VACNTs maintain the level expression of Aggrecan, Sox9, and Collagen II determined by qPCR. This study was the first to indicate that superhydrophilic VACNTs may be used as an efficient scaffold for cartilage or bone repair.
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Affiliation(s)
- Eliane Antonioli
- Research and Education Institute, Hospital Israelita Albert Einstein, Sao Paulo, SP, Brazil.
| | - Anderson O Lobo
- Laboratory of Biomedical Nanotechnology, Universidade do Vale do Paraíba, Sao Jose dos Campos, Sao Paulo, Brazil.
| | - Mario Ferretti
- Research and Education Institute, Hospital Israelita Albert Einstein, Sao Paulo, SP, Brazil; Ortophedic Division, Federal University of Sao Paulo, SP, Brazil.
| | - Moisés Cohen
- Research and Education Institute, Hospital Israelita Albert Einstein, Sao Paulo, SP, Brazil; Ortophedic Division, Federal University of Sao Paulo, SP, Brazil.
| | - Fernanda R Marciano
- Laboratory of Biomedical Nanotechnology, Universidade do Vale do Paraíba, Sao Jose dos Campos, Sao Paulo, Brazil.
| | - Evaldo J Corat
- Laboratorio Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais, Sao Jose dos Campos, Sao Paulo, Brazil.
| | - Vladimir J Trava-Airoldi
- Laboratorio Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais, Sao Jose dos Campos, Sao Paulo, Brazil.
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The effect of exposed glass fibers and particles of bioactive glass on the surface wettability of composite implants. Int J Biomater 2011; 2011:607971. [PMID: 22253628 PMCID: PMC3255171 DOI: 10.1155/2011/607971] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Accepted: 09/13/2011] [Indexed: 12/03/2022] Open
Abstract
Measurement of the wettability of a material is a predictive index of cytocompatibility. This study was designed to evaluate the effect of exposed E-glass fibers and bioactive glass (BAG) particles on the surface wettability behavior of composite implants. Two different groups were investigated: (a) fiber reinforced composites (FRCs) with different fiber orientations and (b) polymer composites with different wt. % of BAG particles. Photopolymerized and heat postpolymerized composite substrates were made for both groups. The surface wettability, topography, and roughness were analyzed. Equilibrium contact angles were measured using the sessile drop method. Three liquids were used as a probe for surface free energy (SFE) calculations. SFE values were calculated from contact angles obtained on smooth surfaces. The surface with transverse distribution of fibers showed higher (P < 0.001) polar (γP) and total SFE (γTOT) components (16.9 and 51.04 mJ/m2, resp.) than the surface with in-plane distribution of fibers (13.77 and 48.27 mJ/m2, resp.). The increase in BAG particle wt. % increased the polar (γP) value, while the dispersive (γD) value decreased. Postpolymerization by heat treatment improved the SFE components on all the surfaces investigated (P < 0.001). Composites containing E-glass fibers and BAG particles are hydrophilic materials that show good wettability characteristics.
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Solouk A, Cousins BG, Mirzadeh H, Seifalian AM. Application of plasma surface modification techniques to improve hemocompatibility of vascular grafts: A review. Biotechnol Appl Biochem 2011; 58:311-27. [PMID: 21995534 DOI: 10.1002/bab.50] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 08/12/2011] [Indexed: 12/14/2022]
Affiliation(s)
- Atefeh Solouk
- Polymer Engineering Faculty, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
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25
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Thermodynamic aspects of fibroblastic spreading on diamond-like carbon films containing titanium dioxide nanoparticles. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-1018-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Gümüşderelioğlu M, Betül Kaya F, Beşkardeş IG. Comparison of epithelial and fibroblastic cell behavior on nano/micro-topographic PCL membranes produced by crystallinity control. J Colloid Interface Sci 2011; 358:444-53. [DOI: 10.1016/j.jcis.2011.03.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 03/06/2011] [Accepted: 03/08/2011] [Indexed: 11/28/2022]
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Subbiahdoss G, Grijpma DW, van der Mei HC, Busscher HJ, Kuijer R. Microbial biofilm growth versus tissue integration on biomaterials with different wettabilities and a polymer-brush coating. J Biomed Mater Res A 2010; 94:533-8. [DOI: 10.1002/jbm.a.32731] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Nisbet DR, Rodda AE, Finkelstein DI, Horne MK, Forsythe JS, Shen W. Surface and bulk characterisation of electrospun membranes: Problems and improvements. Colloids Surf B Biointerfaces 2009; 71:1-12. [DOI: 10.1016/j.colsurfb.2009.01.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 01/28/2009] [Accepted: 01/30/2009] [Indexed: 11/29/2022]
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Abou Neel EA, Chrzanowski W, Pickup DM, O'Dell LA, Mordan NJ, Newport RJ, Smith ME, Knowles JC. Structure and properties of strontium-doped phosphate-based glasses. J R Soc Interface 2008; 6:435-46. [PMID: 18826914 DOI: 10.1098/rsif.2008.0348] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Owing to similarity in both ionic size and polarity, strontium (Sr2+) is known to behave in a comparable way to calcium (Ca2+), and its role in bone metabolism has been well documented as both anti-resorptive and bone forming. In this study, novel quaternary strontium-doped phosphate-based glasses, containing 1, 3 and 5 mol% SrO, were synthesized and characterized. (31)P magic angle spinning (MAS) nuclear magnetic resonance results showed that, as the Sr2+ content is increased in the glasses, there is a slight increase in disproportionation of Q2 phosphorus environments into Q(1) and Q3 environments. Moreover, shortening and strengthening of the phosphorus to bridging oxygen distance occurred as obtained from FTIR. The general broadening of the spectral features with Sr2+ content is most probably due to the increased variation of the phosphate-cation bonding interactions caused by the introduction of the third cation. This increased disorder may be the cause of the increased degradation of the Sr-containing glasses relative to the Sr-free glass. As confirmed from elemental analysis, all Sr-containing glasses showed higher Na2O than expected and this also could be accounted for by the higher degradation of these glasses compared with Sr-free glasses. Measurements of surface free energy (SFE) showed that incorporation of strontium had no effect on SFE, and samples had relatively higher fractional polarity, which is not expected to promote high cell activity. From viability studies, however, the incorporation of Sr2+ showed better cellular response than Sr(2+)-free glasses, but still lower than the positive control. This unfavourable cellular response could be due to the high degradation nature of these glasses and not due to the presence of Sr2+.
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Affiliation(s)
- Ensanya A Abou Neel
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, 256 Gray's Inn Road, London WC1X 8LD, UK
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Karakeçili AG, Gümüşderelioğlu M. Physico-chemical and thermodynamic aspects of fibroblastic attachment on RGDS-modified chitosan membranes. Colloids Surf B Biointerfaces 2008; 61:216-23. [PMID: 17904828 DOI: 10.1016/j.colsurfb.2007.08.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2007] [Revised: 08/03/2007] [Accepted: 08/14/2007] [Indexed: 11/21/2022]
Abstract
In the present study, the cell attachment/spreading behaviour of L929 mouse fibroblasts on chitosan membranes was evaluated by using physico-chemical properties. For this purpose chitosan membranes were prepared and then photochemically modified with the cell adhesive peptide RGDS (Arg-Gly-Asp-Ser). The physico-chemical properties of unmodified (CHI) and RGDS-modified chitosan (CHI-RGDS) membranes were evaluated by calculating surface free energy (gamma(sv)) and interfacial free energy (gamma(sw)) values using captive bubble contact angle measurements and harmonic mean equation. The cell attachment experiments were performed both in 10% FBS containing and serum-free media with CHI and CHI-RGDS membranes. Eventually, it was not possible to predict a direct relationship between the change in physico-chemical properties and L929 cell attachment behaviour. The experimental results obtained from cell attachment agree with the theoretical prediction for the free energy of adhesion except for the cell attachment on CHI membrane in serum-free medium. Although a negative interfacial free energy of adhesion was calculated for CHI membrane in serum-free medium (DeltaF(adh)=-2.19 ergs/cm(2)), the cell attachment was poor (approximately 70%) compared to CHI-RGDS (approximately 90%) and none of the cells were spread on CHI surface to gain a fibroblastic morphology. Negative energy of adhesion was calculated for CHI and CHI-RGDS in 10% FBS medium, in which approximately 100% of cells were attached on the membranes correlating with the thermodynamic approach. It can be suggested that, adsorption of serum proteins strongly affected the cell attachment meanwhile the presence of biosignal RGDS molecules triggered the cell spreading in serum medium.
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Affiliation(s)
- Ayşe Gönen Karakeçili
- Hacettepe University, Chemical Engineering Department, 06800 Beytepe, Ankara, Turkey
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Evaluation of endothelial cell adherence onto collagen and fibronectin: A comparison between jet impingement and flow chamber techniques. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2006. [DOI: 10.1016/j.msec.2005.10.051] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Marques A, Reis R. Hydroxyapatite reinforcement of different starch-based polymers affects osteoblast-like cells adhesion/spreading and proliferation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2005. [DOI: 10.1016/j.msec.2005.01.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Zhao Q, Liu Y, Abel EW. Effect of temperature on the surface free energy of amorphous carbon films. J Colloid Interface Sci 2004; 280:174-83. [PMID: 15476788 DOI: 10.1016/j.jcis.2004.07.004] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2004] [Accepted: 07/13/2004] [Indexed: 11/18/2022]
Abstract
Diamond-like carbon (DLC) and tetrahedral amorphous carbon (ta-C) have attracted much attention recently for biomedical and antifouling applications due to their excellent biocompatibility and inherent nonstick properties. It has been demonstrated that the solid surface free energy is a dominant factor in cellular or fouling adhesion. However, few data for the surface free energy of DLC and ta-C coatings at temperatures in the range 37-95 degrees C are available. In this study DLC and ta-C coatings on stainless steel 304 sheets were prepared using an unbalanced magnetron sputtering system and a filtered cathodic vacuum arc system, respectively. The contact angles of water, diiodomethane and ethylene glycol on the coated surfaces at temperatures in the range 20-95 degrees C were measured using a Dataphysics OCA-20 contact angle analyzer. The surface free energy of the coatings and their components (e.g., dispersion, polar or acid/base portions) were calculated using various methods. The experimental results showed that the total surface free energy and dispersive surface free energy of the ta-C coatings, DLC coatings, stainless steel 304 and titanium decreased with increasing surface temperature, while the acid-base SFE component increased with increasing temperature.
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Affiliation(s)
- Q Zhao
- Department of Mechanical Engineering, University of Dundee, Dundee DD1 4HN, Scotland, UK.
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35
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van Kooten TG, Spijker HT, Busscher HJ. Plasma-treated polystyrene surfaces: model surfaces for studying cell-biomaterial interactions. Biomaterials 2004; 25:1735-47. [PMID: 14738836 DOI: 10.1016/j.biomaterials.2003.08.071] [Citation(s) in RCA: 178] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Biocompatibility of biomaterials relates, amongst others, to the absence of adverse cellular reactions and modulation of cell adhesion and subsequent responses. With respect to tissue-engineering applications, most materials need to evoke cell adhesion and spreading, while potentially displaying differential cell function. Adhesion has frequently been studied in a controlled fashion, using adhesion-supporting and -inhibiting substrata. The aim of this study is to create a panel of related materials with gradually changing surface characteristics in order to sustain similar individual cell adhesion and spreading, yet different cell population behaviour. A series of polystyrene materials was created with increasing oxygen surface incorporation and, concurrently, decreasing water-contact angles. Individual cells adhered and spread on all surfaces whilst showing well-developed focal adhesions and stress fibres. Cell populations demonstrated a decreased growth on surfaces with lower wettability. The biochemical activity of cell populations was not influenced by the surface treatment, but cell proliferation on surfaces increased with increasing oxygen incorporation. Furthermore, surface coverage with assembled fibronectin matrix was higher on the substrata with higher wettability. Finally, the expression of the adhesion-related proteins cadherin-5, focal adhesion kinase and RhoA was increased on surfaces with higher wettability. Further explorations of the cell biological basis of the observed differential behaviour will give more detailed answers on the rules governing cell-material interactions.
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Affiliation(s)
- Theo G van Kooten
- Department of Biomedical Engineering (BME), University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
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36
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Hermitte L, Thomas F, Bougaran R, Martelet C. Contribution of the comonomers to the bulk and surface properties of methacrylate copolymers. J Colloid Interface Sci 2004; 272:82-9. [PMID: 14985025 DOI: 10.1016/j.jcis.2003.08.055] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2003] [Accepted: 08/13/2003] [Indexed: 11/23/2022]
Abstract
Relationships between formulation, bulk properties, and surface properties are investigated on series of copolymers prepared with hydroxyethylmethacrylate (HEMA), methylmethacrylate (MMA), and ethylmethacrylate (EMA) monomers, and on the homopolymers PMMA and PHEMA. The bulk water content, swelling ratio, and static (sessile drop and captive bubble) and dynamic (Wilhelmy plate technique) contact angles and the electrokinetic potential (streaming potential) are measured. The bulk water content and swelling ratio of HEMA copolymers are proportional to the amount of HEMA and are linearly correlated to the contact angle hysteresis. Periodic instabilities in the wetting cycles, similar to Haines jumps, are observed with HEMA copolymers and support a bidirectional relaxation of the hydrophilic groups respectively towards external water and capillary water. The origin of the electrokinetic potential of these nonionizable polymers is attributed to specific adsorption of [Formula: see text] ions. Its dependence on surface hydrophobicity and statistical length of the side-chains is interpreted in terms of the properties of water molecules near the interface.
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Affiliation(s)
- L Hermitte
- Laboratoire Ingénierie et Fonctionnalisation des Surfaces, FRE 2608, 36, av. Guy de Collongue, 64134 Ecully Cedex, France
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Feng B, Weng J, Yang BC, Qu SX, Zhang XD. Characterization of surface oxide films on titanium and adhesion of osteoblast. Biomaterials 2003; 24:4663-70. [PMID: 12951009 DOI: 10.1016/s0142-9612(03)00366-1] [Citation(s) in RCA: 281] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The relationship between surface characteristics of titanium and initial interactions of titanium-osteoblasts was investigated. Titanium plates were heat-treated in different oxidation atmospheres. The third passage rabbit osteoblasts were cultured on the titanium plates for 24h. After the heat-treatment, the crystal structure of the surface oxide films on titanium was identified using X-ray diffractometer and X-ray photoelectron spectroscopy (XPS). The surface roughness of titanium was measured with a profilometer. The surface energy was obtained by measurement of contact angles and calculation with Owens-Wendt-Kaeble's equation. The amount of surface hydroxyl (OH)(s) groups was examined using XPS. The change of binding energy of the some elements on the substrate surface suggested that the interactions between the cells and the titanium involved chemical reactions. The greater surface roughness, higher surface energy and more surface hydroxyl groups resulted in greater numbers of adhered osteoblasts and higher cell activity. Compared to the acidic hydroxyl (OH)(a) groups in (OH)(s) groups and the dispersion component of the total surface energy, the basic hydroxyl (OH)(b) groups and the polar component play more important roles in the osteoblast-titanium interaction.
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Affiliation(s)
- B Feng
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China.
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38
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Ponsonnet L, Reybier K, Jaffrezic N, Comte V, Lagneau C, Lissac M, Martelet C. Relationship between surface properties (roughness, wettability) of titanium and titanium alloys and cell behaviour. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2003. [DOI: 10.1016/s0928-4931(03)00033-x] [Citation(s) in RCA: 339] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Redey SA, Nardin M, Bernache-Assolant D, Rey C, Delannoy P, Sedel L, Marie PJ. Behavior of human osteoblastic cells on stoichiometric hydroxyapatite and type A carbonate apatite: role of surface energy. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2000; 50:353-64. [PMID: 10737877 DOI: 10.1002/(sici)1097-4636(20000605)50:3<353::aid-jbm9>3.0.co;2-c] [Citation(s) in RCA: 192] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To determine the role of physicochemical characteristics of the surface of dense ceramics on osteoconduction, we studied the proliferation and differentiation of human trabecular (HT) osteoblastic cells, extracellular collagenous matrix production, and biologic apatite formation on stoichiometric hydroxyapatite (HA) and type A carbonate apatite (CA). The surface physicochemical characteristics (composition, roughness) of HA and CA carefully were determined by Fourier-transformed infrared, X-ray photoelectron, and Raman spectroscopies, and by FTIR microscopy, before and after cell culture. On both HA and CA substrates, HT cells attached, proliferated, and differentiated. Cell proliferation did not differ on HA and CA. However, the initial cell attachment and spreading of HT cells were much lower on CA compared to HA. Physicochemical and biologic analyses showed that collagenous synthesis by HT cells after 6 weeks of culture also was lower on CA than on HA. Quantitative histologic analysis confirmed that the collagenous matrix production was lower on CA than on HA. Measurement of wettability showed that the polar interaction energy with water was significantly lower on CA than on HA. The lower cell attachment and collagen production on CA compared to HA clearly were related to the low affinity of HT cells for the CA surface. This study shows that the surface energy of the biomaterial greatly influences the initial cell attachment and spreading of human osteoblastic cells at the surface and affects collagenous matrix deposition on the biomaterial. This suggests that the enhancement of polar components of the surface of dense biomaterials may improve osteoblastic cell attachment and, thereby, osteoconduction.
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Affiliation(s)
- S A Redey
- Institut de Chimie des Surfaces et Interfaces (CNRS-UPR 9069), 15 rue Jean Starcky, 68057, Mulhouse, France
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40
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The influence of surface chemistry on the control of cellular behavior: studies with a marine diatom and a wettability gradient. Colloids Surf B Biointerfaces 1999. [DOI: 10.1016/s0927-7765(98)00102-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Ruardy TG, Moorlag HE, Schakenraad JM, Van Der Mei HC, Busscher HJ. Growth of Fibroblasts and Endothelial Cells on Wettability Gradient Surfaces. J Colloid Interface Sci 1997. [DOI: 10.1006/jcis.1997.4769] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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42
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Abstract
A video microscope system and a mathematical model were developed to observe and model the early stage of bacterial growth on polymer surfaces. Glass slides were coated with polyorthoester, poly(L-lactic acid), and polysulfone, and inserted into a laminar flow cell to expose them to bacterial cultures of Staphylococcus epidermidis, Pseudomonas aeruginosa, or Escherichia coli. The free energy of adhesion (delta Fadh) was determined from contact-angle measurements. The microscopic observations along with the mathematical model allowed measurement of the rates of adhesion, release, and growth. The growth rate of P. aeruginosa on the various surfaces correlated to the delta Fadh. The growth rates of all species on all of the surfaces were slower than the growth rates of the bacteria in suspension. The mathematical model is valid for early growth before the bacteria form a complete monolayer, and is useful in predicting and modeling early growth of bacteria on implanted biomaterials.
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Affiliation(s)
- A J Barton
- Chemical Engineering Department, Brigham Young University, Provo, Utah 84602, USA
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43
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Boulané-Petermann L. Processes of bioadhesion on stainless steel surfaces and cleanability: A review with special reference to the food industry. BIOFOULING 1996; 10:275-300. [PMID: 22115182 DOI: 10.1080/08927019609386287] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Biofouling of equipment surfaces in the food industry is due initially to physico-chemical adhesion processes, and subsequently to the proliferation of microbes within an extracellular polymer matrix. Two physico-chemical theories can be applied to predict simple cases of bacterial adhesion. However, these models are limited in their applicability owing to the complexity of bacterial surfaces and the surrounding medium. Various factors that can affect the bacterial adhesion process have been listed, all directly linked to the solid substratum, the suspension liquid or the microorganism. For stainless steel surfaces, it is important to take into account the grade of steel, the type of finish, surface roughness, the cleaning procedures used and the age of the steel. Regarding the suspension fluid within which adhesion takes place, pH, ionic composition and the presence of macromolecules are important variables. In addition, the adhering microorganisms have extremely complex surfaces and many factors must be taken into account when conducting adhesion tests, such as the presence of cell appendages, the method of culture, the contact time between the microorganism and the surface, and exopolymer synthesis. Research on biofilms growing on stainless steel has confirmed results obtained with other materials, regarding resistance to disinfectants, the role of the extracellular matrix and the process by which the biofilm forms. However, it appears that the bactericidal activity of disinfectants on biofilms differs according to the type of surface on which they are growing. The main cleaners and disinfectants used in the food industry are alkaline and acid detergents, peracetic acid, quaternary ammonium chlorides and iodophors. The cleanability and disinfectability of stainless steel surfaces have been compared with those of other materials. According to the published research findings, stainless steel is comparable in its biological cleanability to glass, and significantly better than polymers, aluminium or copper. Moreover, microorganisms in a biofilm developing on a stainless steel surface can be killed with lower concentrations of disinfectant than those on polymer surfaces.
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Affiliation(s)
- L Boulané-Petermann
- a UGINE SAVOIE , Centre de Recherches , Avenue Paul Girod , Ugine Cedex , 73403 , France Fax:
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44
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von Recum AF, van Kooten TG. The influence of micro-topography on cellular response and the implications for silicone implants. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 1996; 7:181-98. [PMID: 7654632 DOI: 10.1163/156856295x00698] [Citation(s) in RCA: 151] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Tissue attachment to substratum surfaces is of central importance to the in vivo performance of prosthetic implant materials. It is not yet understood why connective tissue does not attach to the surface of silicone or any other polymeric material. Recently the authors have conclusively demonstrated that micro-range surface roughness modifies cellular responses in cell culture and modifies biocompatibility and tissue attachment in vivo significantly. In order to better understand the basic interactions between living cells or tissues on one hand and man-made substratum surfaces on the other hand, the germane literature is reviewed here. Cells adhere to substratum surfaces mainly through focal adhesions which are a complex of intracellular transmembrane and extracellular proteins. Adhesion is facilitated and modified by proteins adsorbed to the substratum surface. Protein adsorption in turn is modified by the underlying substratum surface properties including surface chemistry, charge, and free energy. When silicone and other polymeric implants having well-defined surface topographic features including pores, pillars, or grooves were implanted, the tissue response to these implants was strongly influenced by the dimensions of these features as well as by other geometric details. Highest biocompatibility along with tissue attachment was seen when topographic features had dimensions of 1-3 microns and a uniform distribution. Cell culture studies revealed that topographic features affect cellular alignment, direction of proliferation, cellular attachment, growth rate, metabolism, and cytoskeletal arrangement. Since discontinuities or curvatures associated with topographic features may represent local changes in surface free energy, it is hypothesized that these discontinuities trigger changes in protein adsorption, protein configuration, and cellular response.
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Affiliation(s)
- A F von Recum
- Department of Bioengineering, Clemson University, SC 29634-0905, USA
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45
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Some Background Concepts. Biomater Sci 1996. [DOI: 10.1016/b978-0-08-050014-0.50008-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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46
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Ruardy TG, Schakenraad JM, van der Mei HC, Busscher HJ. Adhesion and spreading of human skin fibroblasts on physicochemically characterized gradient surfaces. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1995; 29:1415-23. [PMID: 8582910 DOI: 10.1002/jbm.820291113] [Citation(s) in RCA: 105] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In this study, adhesion and spreading of human skin fibroblasts on gradient surfaces of dichlorodimethylsilane (DDS) coupled to glass was investigated. Gradient surfaces were prepared by the diffusion technique and characterized by the Wilhelmy plate technique and characterized by the Wilhelmy plate technique for their wettability and by scanning x-ray photoelectron spectroscopy for their chemical surface composition. A linear relation between the gradient length, based on advancing water contact angles, and the square root of the diffusion time of DDS was observed. XPS analysis and the cellular experiments were carried out on gradient surfaces prepared using a diffusion time of 3 h. A continuously varying chemical composition with Si/O elemental surface concentration ratio being highest on the hydrophobic end of the gradient surfaces. In the presence of serum proteins, human skin fibroblasts seeded on these gradient surfaces showed a preferential adhesion onto the steepest part of the gradient, probably due to an optimal local wettability and/or local chemistry. Furthermore, it was shown that the spread area of human fibroblasts increased over the length of the gradient surface when going from the hydrophobic to the hydrophilic end. Summarizing, this study shows that the use of gradient surfaces to study cellular responses to materials surface properties, like wettability, yields more-convincing conclusions than the use of a variety of materials with different wettabilities due to the control of the specific surface chemistry of gradient surfaces.
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Affiliation(s)
- T G Ruardy
- Laboratory for Materia Technica, University of Groningen, The Netherlands
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47
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van Kooten TG, Schakenraad JM, Van der Mei HC, Busscher HJ. Development and use of a parallel-plate flow chamber for studying cellular adhesion to solid surfaces. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1992; 26:725-38. [PMID: 1527097 DOI: 10.1002/jbm.820260604] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A parallel-plate flow chamber is developed in order to study cellular adhesion phenomena. An image analysis system is used to observe individual cells exposed to flow in situ and to determine area, perimeter, and shape of these cells as a function of time and shear stress. With this flow system the behavior of human fibroblasts spread on glass is studied when exposed to an increasing laminar flow. The flow system appears to be well-suited for following individual cells during detachment. After 75 to 90 min, at a shear stress of 350 dynes/cm2, more than 50% of the spread cells are detached from the surface. Cells with higher spreading areas stay longer at the glass surface. Cells round up before detaching. Sometimes the cell body is attached to the substratum through a thin filament during detachment. At the scanning electron microscopy level numerous filopodial extensions are observed. Cell material could only rarely be observed at the light or scanning electron microscopic level on the substratum once a cell was detached.
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Affiliation(s)
- T G van Kooten
- Laboratory for Materia Technica, University of Groningen, The Netherlands
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48
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Jańczuk B, Chibowski E. Comments on the paper “correlation between retention in liquid chromatography and the adsorption energy” by J. Kloubek. Chromatographia 1992. [DOI: 10.1007/bf02262332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Schakenraad JM, van der Mei HC, Rouxhet PG, Busscher HJ. Characterization of eukaryotic cell surfaces prior to and after serum protein adsorption by X-ray photoelectron spectroscopy. Fibroblasts, HELA epithelial, and smooth muscle cells. CELL BIOPHYSICS 1992; 20:57-67. [PMID: 1284782 DOI: 10.1007/bf02782654] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Elemental surface concentration ratios N/C,O/C, and P/C of fibroblasts, HELA epithelial cells, and smooth muscle cells, prior to and after washing in the absence or presence of serum proteins, were determined by X-ray photoelectron spectroscopy. Cell surfaces appeared to adsorb hardly any serum proteins, and the relatively high P/C, as compared to N/C and O/C, elemental surface concentration ratio indicated that the cell surfaces consisted mainly of the phospholipid bilayer, with little or no proteins present. The lack of adsorption of serum proteins to the cell surfaces seems at odds with the common notion that cells require adhesive proteins in order to adhere and spread. However, the adsorption behavior of cellularly produced proteins may be completely different, particularly since they seem to be able to displace adsorbed serum proteins from biomaterials surfaces. Interestingly, only HELA epithelial cells (a tumor cell line) appeared to adsorb a very small amount of proteins.
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Affiliation(s)
- J M Schakenraad
- Center for Biomedical Technology, University of Groningen, The Netherlands
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50
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Goodman SL, Cooper SL, Albrecht RM. The effects of substrate-adsorbed albumin on platelet spreading. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 1991; 2:147-59. [PMID: 2054333 DOI: 10.1163/156856291x00133] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Adsorbed albumin appears to passivate nearly all materials, minimizing platelet adhesion and thrombus formation. Since in vitro platelet spreading can be an indicator of in vivo reactivity leading to thrombosis, and as in vitro platelet adhesion investigations are routinely done in the presence of bovine or human serum albumin (BSA or HSA), we examined the influence of albumin on platelet reactivity to material substrates. Platelet spreading was examined subsequent to adherence onto several related polyurethanes, and to Formvar, in the presence of bulk albumin concentrations sufficient to form an adsorbed monolayer or a multilayer. No other exogenous proteins were present. The spreading behavior of adherent platelets was analyzed using generalized linear interactive modeling (GLIM). The models showed that the polymer type always influenced platelet responses, irrespective of the albumin concentration. In many experiments, platelet behavior could be adequately modeled without including the effects of albumin. Thus, the polymer type appeared to be the primary determinant of platelet shape-change with adsorbed albumin producing a secondary effect. Additionally, somewhat different effects on spreading were observed with HSA and BSA, suggesting qualitatively different interactions between human platelets and HSA, than with BSA, which is commonly used in platelet preparations.
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Affiliation(s)
- S L Goodman
- Department of Veterinary Science, University of Wisconsin, Madison 53706
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