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Thomas G, Fitzgerald ST, Gautam R, Chen F, Haugen E, Rasiah PK, Adams WR, Mahadevan-Jansen A. Enhanced characterization of breast cancer phenotypes using Raman micro-spectroscopy on stainless steel substrate. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1188-1205. [PMID: 36799369 DOI: 10.1039/d2ay01764d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Biochemical insights into varying breast cancer (BC) phenotypes can provide a fundamental understanding of BC pathogenesis, while identifying novel therapeutic targets. Raman spectroscopy (RS) can gauge these biochemical differences with high specificity. For routine RS, cells are traditionally seeded onto calcium fluoride (CaF2) substrates that are costly and fragile, limiting its widespread adoption. Stainless steel has been interrogated previously as a less expensive alternative to CaF2 substrates, while reporting increased Raman signal intensity than the latter. We sought to further investigate and compare the Raman signal quality measured from stainless steel versus CaF2 substrates by characterizing different BC phenotypes with altered human epidermal growth factor receptor 2 (HER2) expression. Raman spectra were obtained on stainless steel and CaF2 substrates for HER2 negative cells - MDA-MB-231, MDA-MB-468 and HER2 overexpressing cells - AU565, SKBr3. Upon analyzing signal-to-noise ratios (SNR), stainless steel provided a stronger Raman signal, improving SNR by 119% at 1450 cm-1 and 122% at 2925 cm-1 on average compared to the CaF2 substrate. Utilizing only 22% of laser power on sample relative to the CaF2 substrate, stainless steel still yielded improved spectral characterization over CaF2, achieving 96.0% versus 89.8% accuracy in BC phenotype discrimination and equivalent 100.0% accuracy in HER2 status classification. Spectral analysis further highlighted increased lipogenesis and altered metabolism in HER2 overexpressing cells, which was subsequently visualized with coherent anti-Stokes Raman scattering microscopy. Our findings demonstrate that stainless steel substrates deliver improved Raman signal and enhanced spectral characterization, underscoring its potential as a cost-effective alternative to CaF2 for non-invasively monitoring cellular biochemical dynamics in translational cancer research.
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Affiliation(s)
- Giju Thomas
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville 37235, TN, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville 37235, TN, USA
| | - Sean T Fitzgerald
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville 37235, TN, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville 37235, TN, USA
| | - Rekha Gautam
- Tyndall National Institute, Cork, T12 R5CP, Ireland
| | - Fuyao Chen
- Yale School of Medicine, Yale University, New Haven 06510, CT, USA
| | - Ezekiel Haugen
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville 37235, TN, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville 37235, TN, USA
| | - Pratheepa Kumari Rasiah
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville 37235, TN, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville 37235, TN, USA
| | - Wilson R Adams
- Department of Pharmacology, Vanderbilt University, Nashville 37232, TN, USA
| | - Anita Mahadevan-Jansen
- Vanderbilt Biophotonics Center, Vanderbilt University, Nashville 37235, TN, USA.
- Department of Biomedical Engineering, Vanderbilt University, Nashville 37235, TN, USA
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In Vitro Corrosion of Titanium Nitride and Oxynitride-Based Biocompatible Coatings Deposited on Stainless Steel. COATINGS 2020. [DOI: 10.3390/coatings10080710] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The reactive cathodic arc deposition technique was used to produce Ti nitride and oxynitride coatings on 304 stainless steel substrates (SS). Both mono (SS/TiN, SS/TiNO) and bilayer coatings (SS/TiN/TiNO and SS/TiNO/TiN) were investigated in terms of elemental and phase composition, microstructure, grain size, morphology, and roughness. The corrosion behavior in a solution consisting of 0.10 M NaCl + 1.96 M H2O2 was evaluated, aiming for biomedical applications. The results showed that the coatings were compact, homogeneously deposited on the substrate, and displaying rough surfaces. The XRD analysis indicated that both mono and bilayer coatings showed only cubic phases with (111) and (222) preferred orientations. The highest crystallinity was shown by the SS/TiN coating, as indicated also by the largest grain size of 23.8 nm, which progressively decreased to 16.3 nm for the SS/TiNO monolayer. The oxynitride layers exhibited the best in vitro corrosion resistance either as a monolayer or as a top layer in the bilayer structure, making them a good candidate for implant applications.
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Pradhan S, Keller KA, Sperduto JL, Slater JH. Fundamentals of Laser-Based Hydrogel Degradation and Applications in Cell and Tissue Engineering. Adv Healthc Mater 2017; 6:10.1002/adhm.201700681. [PMID: 29065249 PMCID: PMC5797692 DOI: 10.1002/adhm.201700681] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 08/13/2017] [Indexed: 12/24/2022]
Abstract
The cell and tissue engineering fields have profited immensely through the implementation of highly structured biomaterials. The development and implementation of advanced biofabrication techniques have established new avenues for generating biomimetic scaffolds for a multitude of cell and tissue engineering applications. Among these, laser-based degradation of biomaterials is implemented to achieve user-directed features and functionalities within biomimetic scaffolds. This review offers an overview of the physical mechanisms that govern laser-material interactions and specifically, laser-hydrogel interactions. The influences of both laser and material properties on efficient, high-resolution hydrogel degradation are discussed and the current application space in cell and tissue engineering is reviewed. This review aims to acquaint readers with the capability and uses of laser-based degradation of biomaterials, so that it may be easily and widely adopted.
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Affiliation(s)
- Shantanu Pradhan
- Department of Biomedical Engineering, University of Delaware, 150 Academy Street, 161 Colburn Lab, Newark DE 19716, USA
| | - Keely A. Keller
- Department of Biomedical Engineering, University of Delaware, 150 Academy Street, 161 Colburn Lab, Newark DE 19716, USA
| | - John L. Sperduto
- Department of Biomedical Engineering, University of Delaware, 150 Academy Street, 161 Colburn Lab, Newark DE 19716, USA
| | - John H. Slater
- Department of Biomedical Engineering, University of Delaware, 150 Academy Street, 161 Colburn Lab, Newark DE 19716, USA
- Delaware Biotechnology Institute, 15 Innovation Way, Newark, DE 19711, USA
- Department of Materials Science and Engineering, University of Delaware, 201 DuPont Hall, Newark, DE 19716, USA
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Zhang H, Han J, Sun Y, Huang Y, Zhou M. MC3T3-E1 cell response to stainless steel 316L with different surface treatments. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:22-9. [DOI: 10.1016/j.msec.2015.06.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 04/29/2015] [Accepted: 06/09/2015] [Indexed: 01/20/2023]
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De Luca AC, Zink M, Weidt A, Mayr SG, Markaki AE. Effect of microgrooved surface topography on osteoblast maturation and protein adsorption. J Biomed Mater Res A 2015; 103:2689-700. [PMID: 25630566 DOI: 10.1002/jbm.a.35407] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 01/16/2015] [Accepted: 01/20/2015] [Indexed: 12/12/2022]
Abstract
Microgrooved surfaces have been used extensively to influence cell contact guidance. Guiding cell growth, extracellular matrix deposition, and mineralization is important for bone implant longevity. In this study, we investigated the osteoblast response to microgrooved metallic surfaces in serum-supplemented medium. Groove spacing was comparable with the spread osteoblast size. Focal adhesions were observed to confine to the intervening ridge/groove boundaries. Osteoblasts bridged over the grooves and were unable to conform to the concave shape of the underlying grooves. Microgrooved surfaces induced higher osteoblast proliferation and metabolic activity after 14 days in osteogenic medium compared with as-received surfaces, resulting in higher mineralization and alignment of cell-secreted collagen after 28 days. To establish whether preferential cell attachment at the ridge/groove boundaries was influenced by the adhesion proteins contained in the serum-supplemented media, fluorescently labeled fibronectin was adsorbed onto the microgrooved substrates at low concentrations, mimicking the concentrations found in blood serum. Fibronectin was found to selectively adsorb onto the ridge/groove boundaries, the osteoblast focal adhesion sites, suggesting that protein adsorption may have influenced the cell attachment pattern.
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Affiliation(s)
- Alba C De Luca
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom
| | - Mareike Zink
- Faculty of Physics and Earth Sciences, Institute for Experimental Physics I, Soft Matter Physics Division, University of Leipzig, Linnéstraße 5, 04103, Leipzig, Germany
| | - Astrid Weidt
- Faculty of Physics and Earth Sciences, Institute for Experimental Physics I, Soft Matter Physics Division, University of Leipzig, Linnéstraße 5, 04103, Leipzig, Germany
| | - Stefan G Mayr
- Leibniz Institute for Surface Modification (IOM), Translational Centre for Regenerative Medicine and Faculty of Physics and Earth Sciences, University of Leipzig, Permoserstraße 15, 04318, Leipzig, Germany
| | - Athina E Markaki
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom
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Lass R, Kolb A, Skrbensky G, Reinisch G, Kubista B, Giurea A, Windhager R, Kotz R. A cementless hip system with a new surface for osseous integration. INTERNATIONAL ORTHOPAEDICS 2013; 38:703-9. [PMID: 24114250 DOI: 10.1007/s00264-013-2135-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Accepted: 09/17/2013] [Indexed: 11/25/2022]
Abstract
PURPOSE The failure of total hip systems caused by wear-particle-induced loosening has focused interest on factors potentially affecting wear rate. Remnants of the blasting material were reported on grit-blasted surfaces for cementless fixation. These particles are believed to cause third-body wear and implant loosening. The purpose of this study was to evaluate the early clinical and radiological outcomes of a cementless hip system with a new, contamination-free, roughened surface with regard to prosthesis-related failures. METHODS Between May 2004 and March 2009, 202 consecutive primary total hip arthroplasties (THAs) (192 patients with a mean age of 62.6 years) were performed using a cementless stem (Hipstar®) and a hemispherical acetabular cup (Trident®). RESULTS At a minimum follow-up of two years, five revisions (2.5%) due to aseptic loosening of the stem and three (1.5%) of the cup were necessary. The cumulative rate of prostheses survival, counting revision of both components and with aseptic failure as end point, was 92.9% at 8.8 years. Radiolucent lines up to three millimetres were evaluated in the proximal part of the femur in 61% of cases. CONCLUSIONS Although the incidence of radiolucent lines was decreased, the revision rate was considerably increased compared to other uncemented hip implants with grit-blasted surfaces in the short- to mid-term follow-up of our study. Subsequent studies are needed to confirm whether these changes in implant material and surface affect the radiological and clinical outcome in the long term.
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Affiliation(s)
- Richard Lass
- Department of Orthopaedics and Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria,
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Chen F, Zhang D, Yang Q, Yong J, Du G, Si J, Yun F, Hou X. Bioinspired wetting surface via laser microfabrication. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6777-92. [PMID: 23865499 DOI: 10.1021/am401677z] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Bioinspired special wettibilities including superhydrophobicity and tunable adhesive force have drawn considerable attention because of their significant potential for fundamental research and practical applications. This review summarizes recent progress in the development of bioinspired wetting surfaces via laser microfabrication, with a focus on controllable, biomimetic, and switchable wetting surfaces, as well as their applications in biology, microfluidic, and paper-based devices, all of which demonstrate the ability of laser microfabrication in producing various multiscale structures and its adaptation in a great variety of materials. In particular, compared to other techniques, laser microfabrication can realize special modulation ranging from superhydrophilic to superhydrophobic without the assistance of fluorination, allowing much more freedom to achieve complex multiple-wettability integration. The current challenges and future research prospects of this rapidly developing field are also being discussed. These approaches open the intriguing possibility of the development of advanced interfaces equipped with the integration of more functionalities.
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Affiliation(s)
- Feng Chen
- State Key Laboratory for Manufacturing Systems Engineering & Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
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Saldaña L, Crespo L, Bensiamar F, Arruebo M, Vilaboa N. Mechanical forces regulate stem cell response to surface topography. J Biomed Mater Res A 2013; 102:128-40. [PMID: 23613185 DOI: 10.1002/jbm.a.34674] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 02/21/2013] [Indexed: 12/21/2022]
Abstract
The interactions between bone tissue and orthopedic implants are strongly affected by mechanical forces at the bone-implant interface, but the interplay between surface topographies, mechanical stimuli, and cell behavior is complex and not well understood yet. This study reports on the influence of mechanical stretch on human mesenchymal stem cells (hMSCs) attached to metallic substrates with different roughness. Controlled forces were applied to plasma membrane of hMSCs cultured on smooth and rough stainless steel surfaces using magnetic collagen-coated particles and an electromagnet system. Degree of phosphorylation of focal adhesion kinase (p-FAK) on the active form (Tyr-397), prostaglandin E2 (PGE2) and vascular endothelial growth factor (VEGF) levels increased on rough samples under static conditions. Cell viability and fibronectin production decreased on rough substrates, while hMSCs maturated to the osteoblastic lineage to a similar extent on both surfaces. PGE2 production and osteoprotegerin/receptor activator of nuclear factor kappa-B ligand ratio increased after force application on both surfaces, although to a greater extent on smooth substrates. p-FAK on Tyr-397 was induced fairly rapidly by mechanical stimulation on rough surfaces while cells cultured on smooth samples failed to activate this kinase in response to tensile forces. Mechanical forces enhanced VEGF secretion and reduced cell viability, fibronetin levels and osteoblastic maturation on smooth surfaces but not on rough samples. The magnetite beads model used in this study is well suited to characterize the response of hMSCs cultured on metallic surfaces to tensile forces and collected data suggest a mechanism whereby mechanotransduction driven by FAK is essential for stem cell growth and functioning on metallic substrates.
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Affiliation(s)
- Laura Saldaña
- Unidad de Investigación, Hospital Universitario La Paz-IdiPAZ, Paseo de la Castellana 261, 28046 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
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Oberringer M, Akman E, Lee J, Metzger W, Akkan CK, Kacar E, Demir A, Abdul-Khaliq H, Pütz N, Wennemuth G, Pohlemann T, Veith M, Aktas C. Reduced myofibroblast differentiation on femtosecond laser treated 316LS stainless steel. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:901-8. [DOI: 10.1016/j.msec.2012.11.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 10/17/2012] [Accepted: 11/12/2012] [Indexed: 10/27/2022]
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Tian SQ, Wang ZY, Fan ZL, Zuo LL. Comparison of ultrasonic and CO₂laser pretreatment methods on enzyme digestibility of corn stover. Int J Mol Sci 2012; 13:4141-4152. [PMID: 22605970 PMCID: PMC3344206 DOI: 10.3390/ijms13044141] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 03/12/2012] [Accepted: 03/22/2012] [Indexed: 11/25/2022] Open
Abstract
To decrease the cost of bioethanol production, biomass recalcitrance needs to be overcome so that the conversion of biomass to bioethanol becomes more efficient. CO2 laser irradiation can disrupt the lignocellulosic physical structure and reduce the average size of fiber. Analyses with Fourier transform infrared spectroscopy, specific surface area, and the microstructure of corn stover were used to elucidate the enhancement mechanism of the pretreatment process by CO2 laser irradiation. The present work demonstrated that the CO2 laser had potential to enhance the bioconversion efficiency of lignocellulosic waste to renewable bioethanol. The saccharification rate of the CO2 laser pretreatment was significantly higher than ultrasonic pretreatment, and reached 27.75% which was 1.34-fold of that of ultrasonic pretreatment. The results showed the impact of CO2 laser pretreatment on corn stover to be more effective than ultrasonic pretreatment.
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Affiliation(s)
- Shuang-Qi Tian
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (S.-Q.T.); (Z.-L.F.); (L.-L.Z.)
- College of Food science and Technology, Henan University of Technology, Zhengzhou 450001, China
| | - Zhen-Yu Wang
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (S.-Q.T.); (Z.-L.F.); (L.-L.Z.)
- School of Forestry, Northeast Forestry University, Harbin 150040, China
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-451-8628-2909; Fax: +86-451-8628-2909
| | - Zi-Luan Fan
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (S.-Q.T.); (Z.-L.F.); (L.-L.Z.)
| | - Li-Li Zuo
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (S.-Q.T.); (Z.-L.F.); (L.-L.Z.)
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Galván JC, Saldaña L, Multigner M, Calzado-Martín A, Larrea M, Serra C, Vilaboa N, González-Carrasco JL. Grit blasting of medical stainless steel: implications on its corrosion behavior, ion release and biocompatibility. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:657-66. [PMID: 22271277 DOI: 10.1007/s10856-012-4549-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Accepted: 01/10/2012] [Indexed: 05/17/2023]
Abstract
This study reports on the biocompatibility of 316 LVM steel blasted with small and rounded ZrO(2) particles or larger and angular shaped Al(2)O(3) particles. The effect of blasting on the in vitro corrosion behavior and the associated ion release is also considered. Surface of Al(2)O(3) blasted samples was rougher than that of ZrO(2) blasted samples, which was also manifested by a higher surface area. Compared to the polished alloy, blasted steels exhibited a lower corrosion resistance at the earlier stages of immersion, particularly when using Al(2)O(3) particles. With increasing immersion time, blasted samples experienced an improvement of the corrosion resistance, achieving impedance values typical of passive alloys. Blasting of the alloy led to an increase in Fe release and the leaching of Ni, Mn, Cr and Mo. On all surfaces, ion release is higher during the first 24 h exposure and tends to decrease during the subsequent exposure time. Despite the lower corrosion resistance and higher amount of ions released, blasted alloys exhibit a good biocompatibility, as demonstrated by culturing osteoblastic cells that attached and grew on the surfaces.
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Affiliation(s)
- J C Galván
- Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Madrid, Spain
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Mikulewicz M, Chojnacka K. Cytocompatibility of medical biomaterials containing nickel by osteoblasts: a systematic literature review. Biol Trace Elem Res 2011; 142:865-89. [PMID: 20703824 PMCID: PMC3152710 DOI: 10.1007/s12011-010-8798-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Accepted: 07/29/2010] [Indexed: 12/12/2022]
Abstract
The present review is based on a survey of 21 studies on the cytocompatibility of medical biomaterials containing nickel, as assessed by cell culture of human and animal osteoblasts or osteoblast-like cells. Among the biomaterials evaluated were stainless steel, NiTi alloys, pure Ni, Ti, and other pure metals. The materials were either commercially available, prepared by the authors, or implanted by various techniques to generate a protective layer of oxides, nitrides, acetylides. The observation that the layers significantly reduced the initial release of metal ions and increased cytocompatibility was confirmed in cell culture experiments. Physical and chemical characterization of the materials was performed. This included, e.g., surface characterization (roughness, wettability, corrosion behavior, quantity of released ions, microhardness, and characterization of passivation layer). Cytocompatibility tests of the materials were conducted in the cultures of human or animal osteoblasts and osteoblast-like cells. The following assays were carried out: cell proliferation and viability test, adhesion test, morphology (by fluorescent microscopy or SEM). Also phenotypic and genotypic markers were investigated. In the majority of works, it was found that the most cytocompatible materials were stainless steel and NiTi alloy. Pure Ni was rendered and less cytocompatible. All the papers confirmed that the consequence of the formation of protective layers was in significant increase of cytocompatibility of the materials. This indicates the possible further modifications of the manufacturing process (formation of the passivation layer).
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Affiliation(s)
- Marcin Mikulewicz
- Department of Dentofacial Orthopedics and Orthodontics, Medical University of Wrocław, Wrocław, Poland.
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Rajesh P, Muraleedharan CV, Komath M, Varma H. Laser surface modification of titanium substrate for pulsed laser deposition of highly adherent hydroxyapatite. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1671-1679. [PMID: 21598038 DOI: 10.1007/s10856-011-4342-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Accepted: 05/09/2011] [Indexed: 05/30/2023]
Abstract
Biomedical implant devices made out of titanium and its alloys are benefited by a modified surface or a bioactive coating to enhance bone bonding ability and to function effectively in vivo for the intended period of time. In this respect hydroxyapatite coating developed through pulsed laser deposition is a promising approach. Since the success of the bioactive ceramic coated implant depends mainly on the substrate-coating strength; an attempt has been made to produce micro patterned surface structure on titanium substrate for adherent hydroxyapatite coating. A pulsed Nd-YAG laser beam (355 nm) with 10 Hz repetition rate was used for surface treatment of titanium as well as hydroxyapatite deposition. The unfocussed laser beam was used to modify the substrate surface with 500-18,000 laser pulses while keeping the polished substrate in water. Hydroxyapatite deposition was done in a vacuum deposition chamber at 400 °C with the focused laser beam under 1 × 10⁻³ mbar oxygen pressure. Deposits were analyzed to understand the physico-chemical, morphological and mechanical characteristics. The obtained substrate and coating surface morphology indicates that laser treatment method can provide controlled micro-topography. Scratch test analysis and microindentation hardness values of coating on laser treated substrate indicate higher mechanical adhesion with respect to coatings on untreated substrates.
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Affiliation(s)
- P Rajesh
- Bioceramics Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology (SCTIMST), Trivandrum 695012, Kerala, India
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Erdoğan M, Öktem B, Kalaycıoğlu H, Yavaş S, Mukhopadhyay PK, Eken K, Ozgören K, Aykaç Y, Tazebay UH, Ilday FÖ. Texturing of titanium (Ti6Al4V) medical implant surfaces with MHz-repetition-rate femtosecond and picosecond Yb-doped fiber lasers. OPTICS EXPRESS 2011; 19:10986-10996. [PMID: 21643360 DOI: 10.1364/oe.19.010986] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We propose and demonstrate the use of short pulsed fiber lasers in surface texturing using MHz-repetition-rate, microjoule- and sub-microjoule-energy pulses. Texturing of titanium-based (Ti6Al4V) dental implant surfaces is achieved using femtosecond, picosecond and (for comparison) nanosecond pulses with the aim of controlling attachment of human cells onto the surface. Femtosecond and picosecond pulses yield similar results in the creation of micron-scale textures with greatly reduced or no thermal heat effects, whereas nanosecond pulses result in strong thermal effects. Various surface textures are created with excellent uniformity and repeatability on a desired portion of the surface. The effects of the surface texturing on the attachment and proliferation of cells are characterized under cell culture conditions. Our data indicate that picosecond-pulsed laser modification can be utilized effectively in low-cost laser surface engineering of medical implants, where different areas on the surface can be made cell-attachment friendly or hostile through the use of different patterns.
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Affiliation(s)
- Mutlu Erdoğan
- Materials Science and Nanotechnology Graduate Program, Bilkent University, Ankara 06800, Turkey.
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Arenas MA, Frutos E, Saldaña L, Conde A, Labajos-Broncano L, González-Martín ML, González-Carrasco JL, Vilaboa N. Corrosion behaviour and biocompatibility of a novel Ni-free intermetallic coating growth on austenitic steel by hot dipping in an Al-12.6%Si alloy. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1005-1014. [PMID: 21437641 DOI: 10.1007/s10856-011-4284-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Accepted: 03/07/2011] [Indexed: 05/30/2023]
Abstract
Commercial 316 LVM austenitic stainless steel samples have been coated by immersion in a bath of molten Al-12.6%Si alloy for 120 s. The coating consists of the Al(12)(Fe,Cr)(3)Si(2) intermetallic. In vitro corrosion behaviour has been evaluated in the Ringer's solution by means of potentiodynamic curves and electrochemical impedance spectroscopy. The results reveal that the coated specimens exhibit lower susceptibility to localised corrosion with respect to the substrate. XPS analysis suggests that the ennoblement of the pitting potential is due to the formation of a chromium oxyhydroxide containing passive layer. The intermetallic coating shows a good biocompatibility, as demonstrated by culturing human mesenchymal stem cells isolated from bone marrow which attached, grew and differentiated to the osteoblastic lineage to a similar extent on coated and bare steels. In summary, this study proposes a method that generates Ni-free coatings of the stainless steel with useful properties for biomedical applications.
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Affiliation(s)
- M A Arenas
- Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avda. Gregorio del Amo 8, 28040 Madrid, Spain.
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Dubiel EA, Martin Y, Vermette P. Bridging the Gap Between Physicochemistry and Interpretation Prevalent in Cell−Surface Interactions. Chem Rev 2011; 111:2900-36. [DOI: 10.1021/cr9002598] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Evan A. Dubiel
- Laboratoire de bio-ingénierie et de biophysique de l’Université de Sherbrooke, Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, Canada J1K 2R1
- Research Centre on Aging, Institut universitaire de gériatrie de Sherbrooke, 1036 rue Belvédère Sud, Sherbrooke, Québec, Canada J1H 4C4
| | - Yves Martin
- Laboratoire de bio-ingénierie et de biophysique de l’Université de Sherbrooke, Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, Canada J1K 2R1
- Research Centre on Aging, Institut universitaire de gériatrie de Sherbrooke, 1036 rue Belvédère Sud, Sherbrooke, Québec, Canada J1H 4C4
| | - Patrick Vermette
- Laboratoire de bio-ingénierie et de biophysique de l’Université de Sherbrooke, Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, Canada J1K 2R1
- Research Centre on Aging, Institut universitaire de gériatrie de Sherbrooke, 1036 rue Belvédère Sud, Sherbrooke, Québec, Canada J1H 4C4
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KUBIES D, HIMMLOVÁ L, RIEDEL T, CHÁNOVÁ E, BALÍK K, DOUDĚROVÁ M, BÁRTOVÁ J, PEŠÁKOVÁ V. The Interaction of Osteoblasts With Bone-Implant Materials: 1. The Effect of Physicochemical Surface Properties of Implant Materials. Physiol Res 2011; 60:95-111. [DOI: 10.33549/physiolres.931882] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
This comparative study of various surface treatments of commercially available implant materials is intended as guidance for orientation among particular surface treatment methods in term of the cell reaction of normal human osteoblasts and blood coagulation. The influence of physicochemical surface parameters such as roughness, surface free energy and wettability on the response of human osteoblasts in the immediate vicinity of implants and on the blood coagulation was studied. The osteoblast proliferation was monitored and the expression of tissue mediators (TNF-α, IL-8, MMP-1, bone alkaline phosphatase, VCAM-1, TGF-β) was evaluated after the cell cultivation onto a wide range of commercially available materials (titanium and Ti6Al4V alloy with various surface treatments, CrCoMo alloy, zirconium oxide ceramics, polyethylene and carbon/carbon composite). The formation of a blood clot was investigated on the samples immersed in a freshly drawn whole rabbit blood using scanning electron microscope. The surfaces with an increased osteoblast proliferation exhibited particularly higher surface roughness (here Ra > 3.5 µm) followed by a high polar part of the surface free energy whereas the effect of wettability played a minor role. The surface roughness was also the main factor regulating the blood coagulation. The blood clot formation analysis showed a rapid coagulum formation on the rough titanium-based surfaces. The titanium with an etching treatment was considered as the most suitable candidate for healing into the bone tissue due to high osteoblast proliferation, the highest production of osteogenesis markers and low production of inflammatory cytokines and due to the most intensive blood clot formation.
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Affiliation(s)
- D. KUBIES
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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18
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Dahotre NB, Paital SR, Samant AN, Daniel C. Wetting behaviour of laser synthetic surface microtextures on Ti-6Al-4V for bioapplication. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:1863-1889. [PMID: 20308107 DOI: 10.1098/rsta.2010.0003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Wettability at the surface of an implant material plays a key role in its success as it modulates the protein adsorption and thereby influences cell attachment and tissue integration at the interface. Hence, surface engineering of implantable materials to enhance wettability to physiological fluid under in vivo conditions is an area of active research. In light of this, in the present work, laser-based optical interference and direct melting techniques were used to develop synthetic microtextures on Ti-6Al-4V alloys, and their effects on wettability were studied systematically. Improved wettability to simulated body fluid and distilled water was observed for Ca-P coatings obtained by direct melting technique. This superior wettability was attributed to both the appropriate surface chemistry and the three-dimensional surface features obtained using this technique. To assert a better control on surface texture and wettability, a three-dimensional thermal model based on COMSOL's multiphysics was employed to predict the features obtained by laser melting technique. The effect of physical texture and wetting on biocompatibility of laser-processed Ca-P coatings was evaluated in the preliminary efforts on culturing of mouse MC3T3-E1 osteoblast cells.
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Affiliation(s)
- Narendra B Dahotre
- Laboratory for Laser Materials Synthesis and Fabrication, University of Tennessee, Knoxville, TN 37996, USA.
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19
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Shadpour H, Allbritton NL. In situ roughening of polymeric microstructures. ACS APPLIED MATERIALS & INTERFACES 2010; 2:1086-93. [PMID: 20423129 PMCID: PMC2861798 DOI: 10.1021/am900860s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A method to perform in situ roughening of arrays of microstructures weakly adherent to an underlying substrate was presented. SU8, 1002F, and polydimethylsiloxane (PDMS) microstructures were roughened by polishing with a particle slurry. The roughness and the percentage of dislodged or damaged microstructures was evaluated as a function of the roughening time for both SU8 and 1002F structures. A maximal RMS roughness of 7-18 nm for the surfaces was obtained within 15-30 s of polishing with the slurry. This represented a 4-9 fold increase in surface roughness relative to that of the native surface. Less than 0.8% of the microstructures on the array were removed or damaged after 5 min of polishing. Native and roughened arrays were assessed for their ability to support fibronectin adhesion and cell attachment and growth. The quantity of adherent fibronectin was increased on roughened arrays by two-fold over that on native arrays. Cell adhesion to the roughened surfaces was also increased compared to native surfaces. Surface roughening with the particle slurry also improved the ability to stamp molecules onto the substrate during microcontact printing. Roughening both the PDMS stamp and substrate resulted in up to a 20-fold improvement in the transfer of BSA-Alexa Fluor 647 from the stamp to the substrate. Thus roughening of micrometer-scale surfaces with a particle slurry increased the adhesion of biomolecules as well as cells to microstructures with little to no damage to largescale arrays of the structures.
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Affiliation(s)
- Hamed Shadpour
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA
| | - Nancy L. Allbritton
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA
- Department of Biomedical Engineering, University of North Carolina, Chapel Hill, 27599, North Carolina, USA, and North Carolina State University, Raleigh, North Carolina 27695, USA
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20
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Lee JH, Heo SJ, Koak JY, Kim SK, Lee SJ, Lee SH. Cellular responses on anodized titanium discs after laser irradiation. Lasers Surg Med 2009; 40:738-42. [PMID: 19065563 DOI: 10.1002/lsm.20721] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND AND OBJECTIVES Although the laser is one of the widely used systems in dental field, literature about the biological effects of laser irradiation on the titanium surface is rare. The aim of this study was to investigate the responses of osteoblast-like cells seeded onto laser irradiated anodized titanium discs, using a CO(2) (carbon dioxide) and Er,Cr:YSGG (erbium chromium-doped yttrium scandium gallium garnet) laser, with reference to cellular proliferation and differentiation in vitro. STUDY DESIGN/MATERIALS AND METHODS Osteoblast-like HOS cells were cultured on four differently treated anodized titanium disc surfaces. Group 1, anodized (control); group 2, CO(2) laser irradiated; group 3, Er,Cr:YSGG laser irradiated (150 J/cm(2)); group 4, Er,Cr:YSGG laser irradiated (300 J/cm(2)). MTS-based cell proliferation assay and alkaline phosphatase (ALP) activity test were used to compare cellular responses after 1 and 3 days. Three-way analysis of variance (ANOVA) and post hoc method were carried out to determine the statistical significance of the differences. RESULTS The cells proliferated actively on all substrates; greatest cellular proliferation was observed in group 4, followed by groups 2, 3, and 1, respectively (P<0.05). The test groups also presented significantly higher ALP activities than the control group (P<0.05) except group 3. For both tests, measured optical densities at 3 days were greater than that of 1 day in control and all test groups (P<0.001). CONCLUSION The data shows that irradiation with a CO(2) laser or Er,Cr:YSGG laser may induce a measurable positive effect on osteoblast proliferation and differentiation.
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Affiliation(s)
- Joo-Hee Lee
- Department of Prosthodontics, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
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21
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Helmus MN, Gibbons DF, Cebon D. Biocompatibility: meeting a key functional requirement of next-generation medical devices. Toxicol Pathol 2008; 36:70-80. [PMID: 18337223 DOI: 10.1177/0192623307310949] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The array of polymeric, biologic, metallic, and ceramic biomaterials will be reviewed with respect to their biocompatibility, which has traditionally been viewed as a requirement to develop a safe medical device. With the emergence of combination products, a paradigm shift is occurring that now requires biocompatibility to be designed into the device. In fact, next-generation medical devices will require enhanced biocompatibility by using, for example, pharmacological agents, bioactive coatings, nano-textures, or hybrid systems containing cells that control biologic interactions to have desirable biologic outcomes. The concept of biocompatibility is moving from a "do no harm" mission (i.e., nontoxic, nonantigenic, nonmutagenic, etc.) to one of doing "good," that is, encouraging positive healing responses. These new devices will promote the formation of normal healthy tissue as well as the integration of the device into adjacent tissue. In some contexts, biocompatibility can become a disruptive technology that can change therapeutic paradigms (e.g., drug-coated stents). New database tools to access biocompatibility data of the materials of construction in existing medical devices will facilitate the use of existing and new biomaterials for new medical device designs.
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Affiliation(s)
- Michael N Helmus
- Medical Devices, Biomaterials, Drug Delivery, and Nanotechnology, Worcester, Massachusetts 01609, USA.
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22
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The haemocompatibility of polyurethane–hyaluronic acid copolymers. Biomaterials 2008; 29:150-60. [DOI: 10.1016/j.biomaterials.2007.09.028] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2007] [Accepted: 09/24/2007] [Indexed: 11/22/2022]
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23
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Hao L, Savalani M, Zhang Y, Tanner K, Heath R, Harris R. Characterization of selective laser-sintered hydroxyapatite-based biocomposite structures for bone replacement. Proc Math Phys Eng Sci 2007. [DOI: 10.1098/rspa.2007.1854] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Integration of the bone into the implant is highly desirable for the long-term performance of the implant. The development of a bone–implant interface is influenced by the surface morphology and roughness, surface wettability and porosity of the implants. This study characterizes these important properties of a hydroxyapatite-based biocomposite structure fabricated by selective laser sintering (SLS) with a comparison to a moulded specimen. The sintered specimens exhibited a rougher surface with open surface pores and a highly interconnected internal porous structure. It was shown that the characteristics of the powder particles used in the SLS provided a more influential means to modify the surface morphology and the features of the internal pores than laser parameter variation. The correlation of wettability and porous structure shows that although surface open pores could help cell ingrowth and bone regeneration, they resulted in a poorer wettability of the materials, which may not encourage initial cell attachment and adhesion. The potential solution to improve the wettability and cell anchorage is discussed.
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Affiliation(s)
- L Hao
- School of Engineering, Computer Science and Mathematics, University of ExeterHarrison Building, Exeter EX4 4QF, UK
- Loughborough University, LoughboroughLeicestershire LE11 3TU, UK
| | - M.M Savalani
- Loughborough University, LoughboroughLeicestershire LE11 3TU, UK
| | - Y Zhang
- Department of Materials, Queen Mary University of LondonLondon E1 4NS, UK
| | - K.E Tanner
- Department of Materials, Queen Mary University of LondonLondon E1 4NS, UK
| | - R.J Heath
- Loughborough University, LoughboroughLeicestershire LE11 3TU, UK
| | - R.A Harris
- Loughborough University, LoughboroughLeicestershire LE11 3TU, UK
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Wang X, Ohlin CA, Lu Q, Hu J. Influence of physicochemical properties of laser‐modified polystyrene on bovine serum albumin adsorption and rat C6 glioma cell behavior. J Biomed Mater Res A 2006; 78:746-54. [PMID: 16739177 DOI: 10.1002/jbm.a.30764] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Biomaterial surface modification is an efficient way of improving cell-material interactions. In this study, sub-micrometer laser-induced periodic surface structures (LIPSS) were produced on polystyrene by laser irradiation. FT-IR analysis confirmed that this treatment also led to surface oxidation and anisotropic orientation of the produced carbonyl groups. As a consequence, the surface energy of the laser-treated polystyrene was 1.45 times that of the untreated polystyrene, as measured by contact-angle goniometry. Protein adsorption and rat C6 glioma cell behavior on the two substrates were investigated, showing that the changed physicochemical properties of laser-modified polystyrene surface led to an increase in the quantity of adsorbed bovine serum albumin and significantly affected the behavior of rat C6 glioma cells. In the early stages of cell spreading, cells explored their microenvironment using filopodium as the main sensor. Moreover, cells actively aligned themselves along the direction of LIPSS gradually and cell attachment and proliferation were significantly enhanced.
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Affiliation(s)
- Xuefeng Wang
- School of Chemistry and Chemical Technology, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
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