1
|
Kosobrodova E, Kondyurin A, Solodko V, Weiss AS, McKenzie DR, Bilek MMM. Covalent Biofunctionalization of the Inner Surfaces of a Hollow-Fiber Capillary Bundle Using Packed-Bed Plasma Ion Implantation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:32163-32174. [PMID: 32531163 DOI: 10.1021/acsami.0c07070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Hollow-fiber capillary bundles are widely used in the production of medical devices for blood oxygenation and purification purposes such as in cardiopulmonary bypass, hemodialysis, and hemofiltration, but the blood interfacing inner surfaces of these capillaries provide poor hemocompatibility. Here, we present a novel method of packed-bed plasma ion implantation (PBPII) for the modification of the inner surfaces of polymeric hollow-fiber bundles enclosed in a cassette. The method is simple and can be performed on an intact hollow-fiber bundle cassette by the placement of a hollow cylindrical electrode, connected to a negative high-voltage pulse generator, around the cassette. The method does not require the insertion of electrodes inside the capillaries or the cassette. Nitrogen gas is fed into the capillaries inside the cassette by connecting the inlet of the cassette to a gas source. Upon the application of negative high-voltage bias pulses to the electrode, plasma is ignited inside the cassette, achieving the surface modification of both the internal and external surfaces of the capillaries. Fourier transform infrared-attenuated total reflectance spectroscopy of the PBPII-treated capillaries revealed the formation of aromatic C═C bonds, indicating the progressive carbonization of the capillary surfaces. The PBPII treatment was found to be uniform along the capillaries and independent of the radial position in the cassette. Atomic force microscopy of cross sections through the capillaries revealed that the increased stiffness associated with the carbonized layer on the inner surface of the PBPII-treated capillary has a depth (∼40 nm) consistent with that expected for ions accelerated by the applied bias voltage. The modified internal surfaces of the capillary bundle showed a greatly increased wettability and could be biofunctionalized by covalently immobilizing protein directly from the buffer solution. The direct, reagent-free protein immobilization was demonstrated using tropoelastin as an example protein. Covalent binding of the protein was confirmed by its resistance to removal by hot sodium dodecyl sulfate detergent washing, which is known to disrupt physical binding.
Collapse
Affiliation(s)
- Elena Kosobrodova
- School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Alexey Kondyurin
- School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Vladislav Solodko
- School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Anthony S Weiss
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales 2006, Australia
| | - David R McKenzie
- School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Nano Institute, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Marcela M M Bilek
- School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia
- Charles Perkins Centre, University of Sydney, Sydney, New South Wales 2006, Australia
- School of Biomedical Engineering, University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Nano Institute, University of Sydney, Sydney, New South Wales 2006, Australia
| |
Collapse
|
2
|
Singh R, Khan MJ, Rane J, Gajbhiye A, Vinayak V, Joshi KB. Biofabrication of Diatom Surface by Tyrosine‐Metal Complexes:Smart Microcontainers to Inhibit Bacterial Growth. ChemistrySelect 2020. [DOI: 10.1002/slct.201904248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ramesh Singh
- Department of ChemistrySchool of Chemical Science and TechnologyDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Mohd Jahir Khan
- Diatom Nanoengineering and Metabolism Lab (DNM)School of Applied SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Jagdish Rane
- Department of Pharmaceutical SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Ashmita Gajbhiye
- Department of Pharmaceutical SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Vandana Vinayak
- Diatom Nanoengineering and Metabolism Lab (DNM)School of Applied SciencesDr. Harisingh Gour Central University Sagar MP 470003 India
| | - Khashti Ballabh Joshi
- Department of ChemistrySchool of Chemical Science and TechnologyDr. Harisingh Gour Central University Sagar MP 470003 India
| |
Collapse
|
3
|
Martelli G, Bloise N, Merlettini A, Bruni G, Visai L, Focarete ML, Giacomini D. Combining Biologically Active β-Lactams Integrin Agonists with Poly(l-lactic acid) Nanofibers: Enhancement of Human Mesenchymal Stem Cell Adhesion. Biomacromolecules 2020; 21:1157-1170. [PMID: 32011862 PMCID: PMC7997109 DOI: 10.1021/acs.biomac.9b01550] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
![]()
Regulating
stem cell adhesion and growth onto functionalized biomaterial
scaffolds is an important issue in the field of tissue engineering
and regenerative medicine. In this study, new electrospun scaffolds
of poly(l-lactic acid) (PLLA), as bioresorbable polymer,
and β-lactam compounds agonists of selected integrins, as functional
components with cell adhesive properties, are designed. The new β-lactam-PLLA
scaffolds contribute significantly in guiding protein translation
involved in human bone marrow mesenchymal stem cells (hBM-MSC) adhesion
and integrin gene expression. Scanning electron microscopy, confocal
laser scanning microscopy, and Western Blot analyses reveal that GM18-PLLA
shows the best results, promoting cell adhesion by significantly driving
changes in focal adhesion proteins distribution (β1 integrin and vinculin) and activation (pFAK), with a notable increase
of GM18-targets subunits integrin gene expression, α4 and β1. These novel functionalized submicrometric
fibrous scaffolds demonstrate, for the first time, the powerful combination
of selective β-lactams agonists of integrins with biomimetic
scaffolds, suggesting a designed rule that could be suitably applied
to tissue repair and regeneration.
Collapse
Affiliation(s)
- Giulia Martelli
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Nora Bloise
- Department of Molecular Medicine (DMM), Biochemistry Unit, Center for Health Technologies (CHT), UdR INSTM University of Pavia, Viale Taramelli 3/B, 27100 Pavia, Italy.,Department of Occupational Medicine, Toxicology and Environmental Risks, Istituti Clinici Scientifici Maugeri S.p.A, IRCCS, Via S. Boezio 28, 27100 Pavia, Italy
| | - Andrea Merlettini
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Giovanna Bruni
- Department of Chemistry, Section of Physical Chemistry, University of Pavia, Viale Taramelli 16, 27100 Pavia, Italy
| | - Livia Visai
- Department of Molecular Medicine (DMM), Biochemistry Unit, Center for Health Technologies (CHT), UdR INSTM University of Pavia, Viale Taramelli 3/B, 27100 Pavia, Italy.,Department of Occupational Medicine, Toxicology and Environmental Risks, Istituti Clinici Scientifici Maugeri S.p.A, IRCCS, Via S. Boezio 28, 27100 Pavia, Italy
| | - Maria Letizia Focarete
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Daria Giacomini
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| |
Collapse
|
4
|
Neděla O, Slepička P, Švorčík V. Surface Modification of Polymer Substrates for Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E1115. [PMID: 28934132 PMCID: PMC5666921 DOI: 10.3390/ma10101115] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/15/2017] [Accepted: 09/18/2017] [Indexed: 01/12/2023]
Abstract
While polymers are widely utilized materials in the biomedical industry, they are rarely used in an unmodified state. Some kind of a surface treatment is often necessary to achieve properties suitable for specific applications. There are multiple methods of surface treatment, each with their own pros and cons, such as plasma and laser treatment, UV lamp modification, etching, grafting, metallization, ion sputtering and others. An appropriate treatment can change the physico-chemical properties of the surface of a polymer in a way that makes it attractive for a variety of biological compounds, or, on the contrary, makes the polymer exhibit antibacterial or cytotoxic properties, thus making the polymer usable in a variety of biomedical applications. This review examines four popular methods of polymer surface modification: laser treatment, ion implantation, plasma treatment and nanoparticle grafting. Surface treatment-induced changes of the physico-chemical properties, morphology, chemical composition and biocompatibility of a variety of polymer substrates are studied. Relevant biological methods are used to determine the influence of various surface treatments and grafting processes on the biocompatibility of the new surfaces-mammalian cell adhesion and proliferation is studied as well as other potential applications of the surface-treated polymer substrates in the biomedical industry.
Collapse
Affiliation(s)
- Oldřich Neděla
- Department of Solid State Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic.
| | - Petr Slepička
- Department of Solid State Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic.
| | - Václav Švorčík
- Department of Solid State Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic.
| |
Collapse
|
5
|
Pan CJ, Hou Y, Wang YN, Liu T, Gong T, Lin YB, Wang LR, Ye W. Biofunctionalisation of magnesium alloys by successive immobilisation of poly(ethylene glycol), fibronectin and heparin. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2017. [DOI: 10.1680/jbibn.16.00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
In the present study, with the aim of improving their corrosion resistance, anticoagulation and cytocompatibility with endothelial cells, a magnesium alloy (AZ31B) was modified by the alkali heat treatment followed by the immobilisation of the dopamine layer. Subsequently, molecules of poly(ethylene glycol) (PEG) and fibronectin or fibronectin–heparin complexes were successively immobilised on the dopamine-modified surface. After the surface modification, the hydrophilicity of magnesium alloy was obviously improved. The corrosion resistance of the magnesium alloy was improved through alkali heat treatment, and the immobilisation of dopamine and PEG can further reduce the corrosion rate. However, the corrosion resistance of the magnesium alloy was slightly reduced by the grafting of fibronectin or fibronectin–heparin complex. Furthermore, the modified samples showed improved hemocompatibility and good cytocompatibility with the endothelial cells on the fibronectin or fibronectin–heparin-modified surfaces. Therefore, the corrosion resistance, anticoagulation and cytocompatibility of the magnesium alloy can be enhanced by alkali heat treatment and subsequent immobilisation of biomolecules. The method of this study can be used for surface modification of magnesium alloys to impart these with better corrosion resistance, blood compatibility and cytocompatibility with endothelial cells simultaneously.
Collapse
Affiliation(s)
- Chang-Jiang Pan
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Yu Hou
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Ya-Nan Wang
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Tao Liu
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Tao Gong
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Yue-Bin Lin
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Ling-Ren Wang
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| | - Wei Ye
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai’an, China
| |
Collapse
|
6
|
Polyhydroxybutyrate by Streptomyces sp.: Production and characterization. Int J Biol Macromol 2017; 104:1165-1171. [PMID: 28690170 DOI: 10.1016/j.ijbiomac.2017.07.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 06/11/2017] [Accepted: 07/05/2017] [Indexed: 11/21/2022]
Abstract
A total number of 20 actinomycetes isolates were isolated from soil sediments obtained from Semmancheri coastal areas of Bay of Bengal, India and they were qualitatively screened for the production of polyhydroxybutyrate (PHB) on a medium containing Sudan black stain. Nine of the 20 isolates produced PHB and the quantity of PHB produced varied from 1.79 to 4.26g-L. Among the positive isolates an actinomycete isolate which was identified as Streptomyces sp. through 16S rRNA sequencing analysis (Accession No: KF667247) produced relatively higher PHB than other positive isolates. Subsequently, the growth conditions were optimized for the maximum PHB production by the chosen organism. Attempt was also made to utilize natural carbon sources such as paddy straw, wheat bran, rice bran, sugarcane molasses and oil cake for the production of PHB in an attempt to reduce the cost production of PHB. The purified PHB was analyzed by Solid-State 13C NMR, Fourier Transformed Infrared spectroscopy, Powder X-ray diffraction, Thermogravimetric Analysis, Scanning and Transmission Electron Microscopic analyses to determine the structure, crystallinity, purity and thermal stability. The present investigation has revealed that Streptomyces sp. could be a potential source for the production of PHB with desirable characteristics and could also be exploited for the industrial production.
Collapse
|
7
|
MATSUMOTO S, KANAZAWA A, KANAOKA S, AOSHIMA S. Precision Synthesis of Degradable Alternating Copolymers of Fluorine-Containing Vinyl Ethers and Conjugated Aldehydes. KOBUNSHI RONBUNSHU 2017. [DOI: 10.1295/koron.2017-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Suzuka MATSUMOTO
- Department of Macromolecular Science, Graduate School of Science, Osaka University
| | - Arihiro KANAZAWA
- Department of Macromolecular Science, Graduate School of Science, Osaka University
| | - Shokyoku KANAOKA
- Department of Macromolecular Science, Graduate School of Science, Osaka University
| | - Sadahito AOSHIMA
- Department of Macromolecular Science, Graduate School of Science, Osaka University
| |
Collapse
|
8
|
Improving Corrosion Resistance and Biocompatibility of Magnesium Alloy by Sodium Hydroxide and Hydrofluoric Acid Treatments. APPLIED SCIENCES-BASEL 2016. [DOI: 10.3390/app7010033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
9
|
Pan CJ, Hou Y, Wang YN, Gao F, Liu T, Hou YH, Zhu YF, Ye W, Wang LR. Effects of self-assembly of 3-phosphonopropionic acid, 3-aminopropyltrimethoxysilane and dopamine on the corrosion behaviors and biocompatibility of a magnesium alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:132-143. [DOI: 10.1016/j.msec.2016.05.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 04/18/2016] [Accepted: 05/09/2016] [Indexed: 10/21/2022]
|
10
|
Anticoagulation and endothelial cell behaviors of heparin-loaded graphene oxide coating on titanium surface. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:333-40. [DOI: 10.1016/j.msec.2016.03.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 02/25/2016] [Accepted: 03/01/2016] [Indexed: 12/23/2022]
|
11
|
Cui J, Ma C, Li Z, Wu L, Wei W, Chen M, Peng B, Deng Z. Polydopamine-functionalized polymer particles as templates for mineralization of hydroxyapatite: biomimetic and in vitro bioactivity. RSC Adv 2016. [DOI: 10.1039/c5ra24821c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polydopamine-assisted biomimetic mineralization was presented to fabricate hydroxyapatite-based, organic–inorganic hybrid materials with excellent biocompatibility.
Collapse
Affiliation(s)
- Junli Cui
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Chao Ma
- The Affiliated Drum Tower Hospital of Nanjing University Medical School
- Nanjing
- China
| | - Zhenni Li
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Longyun Wu
- The Affiliated Drum Tower Hospital of Nanjing University Medical School
- Nanjing
- China
| | - Wei Wei
- Department of Gastrointestinal Surgery
- The Second Affiliated Hospital of Nanjing Medical University
- Nanjing
- China
| | - Min Chen
- The Affiliated Drum Tower Hospital of Nanjing University Medical School
- Nanjing
- China
| | - Bo Peng
- Department of Chemistry
- Physical and Theoretical Chemistry Laboratory
- University of Oxford
- Oxford OX1 3QZ
- UK
| | - Ziwei Deng
- School of Materials Science and Engineering
- Shaanxi Normal University
- Xi'an
- China
| |
Collapse
|
12
|
Řezníčková A, Makajová Z, Slepičková Kasálková N, Kolská Z, Bačáková L, Švorčík V. Growth of muscle cells on plasma-treated and gold nanoparticles-grafted polytetrafluoroethylene. IRANIAN POLYMER JOURNAL 2014. [DOI: 10.1007/s13726-013-0218-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Fragoso AS, Silva MB, de Melo CP, Aguiar JLA, Rodrigues CG, de Medeiros PL, Branco Junior JF, Andrade CAS, Oliveira MDL. Dielectric study of the adhesion of mesenchymal stem cells from human umbilical cord on a sugarcane biopolymer. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:229-237. [PMID: 24072391 DOI: 10.1007/s10856-013-5056-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 09/16/2013] [Indexed: 06/02/2023]
Abstract
It is of current interest the identification of appropriate matrices for growing mesenchymal stem cells (MSC). These cells are able not only to regenerate themselves but also to differentiate into other type of functional cells, and so they have been extensively used in tissue engineering. In this work, we have evaluated the use of electric impedance spectroscopy (EIS) to follow the adhesion of MSC from Wharton's jelly of the human umbilical cord (hWJMSC) on sugarcane biopolymers (SCB). Impedance spectra of the systems were obtained in the frequency range of 10(2)-10(5) Hz. An EIS investigation showed that when deposited on a metallic electrode SCB films prevent the passage of electrons between the solution and the metallic interface. The impedance spectra of hWJMSCs adhered on SCB revealed that there is a significant increase in the magnitude of the impedance when compared to that of pure SCB. The corresponding resistance (real part of the impedance) was even higher for the SCB-hWJMSC system than for SCB without cells on their surface, in an indication of an increased blockage to the electron transfers. The resistance charge transfer is extracted by curve-fitting the impedance spectra to an equivalent circuit model. Also, a shift of the phase angle to higher frequencies was obtained for SCB-hWJMSC system as a result from hWJMSC adhesion. Our study demonstrates that EIS is an appropriate method to evaluate the adhesion of MSC. SCB can be considered as a promising biomaterial for tissue engineering.
Collapse
Affiliation(s)
- A S Fragoso
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, 50670-901, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Pan CJ, Hou YH, Zhang BB, Dong YX, Ding HY. Blood compatibility and interaction with endothelial cells of titanium modified by sequential immobilization of poly (ethylene glycol) and heparin. J Mater Chem B 2014; 2:892-902. [DOI: 10.1039/c3tb21403f] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
15
|
Choi JS, Messersmith PB, Yoo HS. Decoration of Electrospun Nanofibers with Monomeric Catechols to Facilitate Cell Adhesion. Macromol Biosci 2013; 14:270-9. [DOI: 10.1002/mabi.201300281] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 07/20/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Ji Suk Choi
- Department of Biomedical Materials Engineering; Kangwon National University; Chuncheon 200-701 Republic of Korea
- Institute of Bioscience and Bioengineering; Kangwon National University; Republic of Korea
| | - Phillip B. Messersmith
- Department of Biomedical Engineering and Chemistry of Life Processes Institute; Northwestern University; Evanston IL 60208 USA
| | - Hyuk Sang Yoo
- Department of Biomedical Materials Engineering; Kangwon National University; Chuncheon 200-701 Republic of Korea
- Institute of Bioscience and Bioengineering; Kangwon National University; Republic of Korea
| |
Collapse
|
16
|
Adhesion, growth, and maturation of vascular smooth muscle cells on low-density polyethylene grafted with bioactive substances. BIOMED RESEARCH INTERNATIONAL 2013; 2013:371430. [PMID: 23586032 PMCID: PMC3622364 DOI: 10.1155/2013/371430] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 02/14/2013] [Indexed: 11/18/2022]
Abstract
The attractiveness of synthetic polymers for cell colonization can be affected by physical, chemical, and biological modification of the polymer surface. In this study, low-density polyethylene (LDPE) was treated by an Ar(+) plasma discharge and then grafted with biologically active substances, namely, glycine (Gly), polyethylene glycol (PEG), bovine serum albumin (BSA), colloidal carbon particles (C), or BSA+C. All modifications increased the oxygen content, the wettability, and the surface free energy of the materials compared to the pristine LDPE, but these changes were most pronounced in LDPE with Gly or PEG, where all the three values were higher than in the only plasma-treated samples. When seeded with vascular smooth muscle cells (VSMCs), the Gly- or PEG-grafted samples increased mainly the spreading and concentration of focal adhesion proteins talin and vinculin in these cells. LDPE grafted with BSA or BSA+C showed a similar oxygen content and similar wettability, as the samples only treated with plasma, but the nano- and submicron-scale irregularities on their surface were more pronounced and of a different shape. These samples promoted predominantly the growth, the formation of a confluent layer, and phenotypic maturation of VSMC, demonstrated by higher concentrations of contractile proteins alpha-actin and SM1 and SM2 myosins. Thus, the behavior of VSMC on LDPE can be regulated by the type of bioactive substances that are grafted.
Collapse
|
17
|
|
18
|
Bacakova L, Filova E, Parizek M, Ruml T, Svorcik V. Modulation of cell adhesion, proliferation and differentiation on materials designed for body implants. Biotechnol Adv 2011; 29:739-67. [PMID: 21821113 DOI: 10.1016/j.biotechadv.2011.06.004] [Citation(s) in RCA: 565] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 05/30/2011] [Accepted: 06/09/2011] [Indexed: 12/12/2022]
Affiliation(s)
- Lucie Bacakova
- Department of Growth and Differentiation of Cell Populations, Institute of Physiology, Academy of Sciences of the Czech Republic, Videnska 1082, 14220 Prague 4-Krc, Czech Republic.
| | | | | | | | | |
Collapse
|
19
|
Luo J, Tong YW. Self-assembly of collagen-mimetic peptide amphiphiles into biofunctional nanofiber. ACS NANO 2011; 5:7739-47. [PMID: 21899363 DOI: 10.1021/nn202822f] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Molecular assembly of protein and peptide is highly specific and frequently occurs in biological systems. Collagen, which is the most abundant component in extracellular matrix, can assemble into fiber and play an essential role in cell adhesion and growth. Since native collagen is difficult to modify and can engender pathogenic and immunological side effects, its application on tissue regeneration is limited. The preparation of collagen-mimetic materials, hence, is gaining interest in the field of tissue regeneration. Collagen peptides have been synthesized to mimic some properties of collagen, such as its triple helix. However, few studies have been done to prepare artificial collagen fiber to mimic its high-level structure and biofunctions. In this work, a novel collagen-mimetic peptide amphiphile (CPA) was prepared by conjugating a single hydrophobic tail with a collagen-mimetic peptide, supplemented with bioactive glycine-phenylalanine-hydroxyproline-glycine-glutamate-arginine (GFOGER). The physical studies indicated that the CPA had a collagen-mimetic triple-helical conformation and was able to self-assemble into nanofiber. In addition, the CPA conjugated with the integrin-specific GFOGER sequence was shown to promote collagen-mimetic cell adhesion and development. The self-assembled peptide nanofiber was shown to have the ability to structurally and biologically mimic native collagen fiber. We anticipate that this artificial collagen fiber holds great potential as collagen-mimetic materials for tissue regeneration applications.
Collapse
Affiliation(s)
- Jingnan Luo
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
| | | |
Collapse
|
20
|
Pařízek M, Novotná K, Bačáková L. The role of smooth muscle cells in vessel wall pathophysiology and reconstruction using bioactive synthetic polymers. Physiol Res 2011; 60:419-37. [PMID: 21401306 DOI: 10.33549/physiolres.932038] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
This review summarizes recent trends in the construction of bioartificial vascular replacements, i.e. hybrid grafts containing synthetic polymeric scaffolds and cells. In these advanced replacements, vascular smooth muscle cells (VSMC) should be considered as a physiological component, although it is known that activation of the migration and proliferation of VSMC plays an important role in the onset and development of vascular diseases, and also in restenosis of currently used vascular grafts. Therefore, in novel bioartificial vascular grafts, VSMCs should be kept in quiescent mature contractile phenotype. This can be achieved by (1) appropriate physical and chemical properties of the material, such as its chemical composition, polarity, wettability, surface roughness and topography, electrical charge and conductivity, functionalization with biomolecules and mechanical properties, (2) appropriate cell culture conditions, such as composition of cell culture media and dynamic load, namely cyclic strain, and (3) the presence of a confluent, mature, semipermeable, non-thrombogenic and non-immunogenic endothelial cell (EC) barrier, covering the luminal surface of the graft and separating the VSMCs from the blood. Both VSMCs and ECs can also be differentiated from stem and progenitor cells of various sources. In the case of degradable scaffolds, the material will gradually be removed by the cells and will be replaced by their own new extracellular matrix. Thus, the material component in advanced blood vessel substitutes acts as a temporary scaffold that promotes regeneration of the damaged vascular tissue.
Collapse
Affiliation(s)
- M Pařízek
- Department of Growth and Differentiation of Cell Populations, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | | | | |
Collapse
|
21
|
Moby V, Labrude P, Kadi A, Bordenave L, Stoltz JF, Menu P. Polyelectrolyte multilayer film and human mesenchymal stem cells: An attractive alternative in vascular engineering applications. J Biomed Mater Res A 2010; 96:313-9. [DOI: 10.1002/jbm.a.32981] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 09/01/2010] [Accepted: 09/02/2010] [Indexed: 01/16/2023]
|
22
|
Improved adhesion, growth and maturation of vascular smooth muscle cells on polyethylene grafted with bioactive molecules and carbon particles. Int J Mol Sci 2009; 10:4352-4374. [PMID: 20057950 PMCID: PMC2790113 DOI: 10.3390/ijms10104352] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/05/2009] [Accepted: 09/30/2009] [Indexed: 11/27/2022] Open
Abstract
High-density polyethylene (PE) foils were modified by an Ar+ plasma discharge and subsequent grafting with biomolecules, namely glycine (Gly), polyethylene glycol (PEG), bovine serum albumin (BSA), colloidal carbon particles (C) or BSA and C (BSA + C). As revealed by atomic force microscopy (AFM), goniometry and Rutherford Backscattering Spectroscopy (RBS), the surface chemical structure and surface morphology of PE changed dramatically after plasma treatment. The contact angle decreased for the samples treated by plasma, mainly in relation to the formation of oxygen structures during plasma irradiation. A further decrease in the contact angle was obvious after glycine and PEG grafting. The increase in oxygen concentration after glycine and PEG grafting proved that the two molecules were chemically linked to the plasma-activated surface. Plasma treatment led to ablation of the PE surface layer, thus the surface morphology was changed and the surface roughness was increased. The materials were then seeded with vascular smooth muscle cells (VSMC) derived from rat aorta and incubated in a DMEM medium with fetal bovine serum. Generally, the cells adhered and grew better on modified rather than on unmodified PE samples. Immunofluorescence showed that focal adhesion plaques containing talin, vinculin and paxillin were most apparent in cells on PE grafted with PEG or BSA + C, and the fibres containing α-actin, β-actin or SM1 and SM2 myosins were thicker, more numerous and more brightly stained in the cells on all modified PE samples than on pristine PE. An enzyme-linked immunosorbent assay (ELISA) revealed increased concentrations of focal adhesion proteins talin and vinculin and also a cytoskeletal protein β-actin in cells on PE modified with BSA + C. A contractile protein α-actin was increased in cells on PE grafted with PEG or Gly. These results showed that PE activated with plasma and subsequently grafted with bioactive molecules and colloidal C particles, especially with PEG and BSA + C, promotes the adhesion, proliferation and phenotypic maturation of VSMC.
Collapse
|
23
|
Grinevich A, Bacakova L, Choukourov A, Boldyryeva H, Pihosh Y, Slavinska D, Noskova L, Skuciova M, Lisa V, Biederman H. Nanocomposite Ti/hydrocarbon plasma polymer films from reactive magnetron sputtering as growth support for osteoblast-like and endothelial cells. J Biomed Mater Res A 2009; 88:952-66. [DOI: 10.1002/jbm.a.31918] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
24
|
Khew ST, Yang QJ, Tong YW. Enzymatically crosslinked collagen-mimetic dendrimers that promote integrin-targeted cell adhesion. Biomaterials 2008; 29:3034-45. [PMID: 18420267 DOI: 10.1016/j.biomaterials.2008.03.023] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Accepted: 03/17/2008] [Indexed: 11/29/2022]
Abstract
Collagen is made up of a diverse family of the extracellular matrices, most of which are generally found crosslinked in vivo. To more closely mimic the biological function of collagen, this work focuses on establishing a molecular strategy to engineer a functional biomimetic collagen that exhibits stable collagen-like triple-helical conformation with cell-binding activity, in addition to an enzyme-mediated crosslinking by tissue transglutaminase (tTGase). A novel sequence spanning residues 2800-2807 of human fibrillin-1 (EDGFFKI) was first identified as an amine donor substrate for tTGase, using a previously characterized APQQEA derived from human osteonectin as an amine acceptor probe. Subsequently, collagen-mimetic peptides (CMPs) supplemented with a cell-binding sequence (GFOGER) and the identified EDGFFKI and APQQEA substrate sequences were conjugated onto a generation 2 poly(amidoamine) dendrimer, resulting in a crosslinkable collagen-mimetic dendrimer, denoted as CMD-K and CMD-Q, respectively. Both CMD-K and CMD-Q exhibited enhanced triple-helical stability and supported cell adhesion in an integrin-specific manner. Finally, tTGase-mediated crosslinking between CMD-K and CMD-Q resulted in a supramolecular structure that exhibited stable collagen-like triple-helical conformation and improved cellular recognition. The results show that the triple-helical structure is important in preserving the GFOGER cell-binding site while the tTGase-mediated protein crosslinking may also be crucial for the recognition by cell surface integrin receptors.
Collapse
Affiliation(s)
- Shih Tak Khew
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 119077, Singapore.
| | | | | |
Collapse
|
25
|
Khew ST, Tong YW. Template-assembled triple-helical peptide molecules: mimicry of collagen by molecular architecture and integrin-specific cell adhesion. Biochemistry 2007; 47:585-96. [PMID: 18154308 DOI: 10.1021/bi702018v] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Most proteins fold into specific structures to exert their biological functions, and therefore the creation of protein-like molecular architecture is a fundamental prerequisite toward realizing a novel biologically active protein-like biomaterial. To do this with an artificial collagen, we have engineered a peptide template characterized by its collagen-like primary structure composed of Gly-Phe-Gly-Glu-Glu-Gly sequence to assemble (Pro-Hyp-Gly)n (n = 3 and 5) into triple-helical conformations that resemble the native structure of collagen. The peptide template has three carboxyl groups connected to the N-termini of three collagen peptides. The coupling was accomplished by a simple and direct branching protocol without complex strategies. A series of biophysical studies, including melting curve analyses and CD and NMR spectroscopy, demonstrated the presence of stable triple-helical conformation in the template-assembled (Pro-Hyp-Gly)3 and (Pro-Hyp-Gly)5 solution. Conversely, nontemplated peptides showed no evidence of assembly of triple-helical structure. A cell binding sequence (Gly-Phe-Hyp-Gly-Glu-Arg) derived from the collagen alpha1(I) chain was incorporated to mimic the integrin-specific cell adhesion of collagen. Cell adhesion and inhibition assays and immunofluorescence staining revealed a correlation of triple-helical conformation with cellular recognition of collagen mimetics in an integrin-specific way. This study offers a robust strategy for engineering native-like peptide-based biomaterials, fully composed of only amino acids, by maintaining protein conformation integrity and biological activity.
Collapse
Affiliation(s)
- Shih Tak Khew
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore
| | | |
Collapse
|
26
|
Khew ST, Zhu XH, Tong YW. An Integrin-Specific Collagen-Mimetic Peptide Approach for Optimizing Hep3B Liver Cell Adhesion, Proliferation, and Cellular Functions. ACTA ACUST UNITED AC 2007; 13:2451-63. [PMID: 17596119 DOI: 10.1089/ten.2007.0063] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This study focused on mimicking collagen structurally and biologically using various peptide sequences toward realizing an artificial collagen-like biomaterial. Collagen-mimetic peptides (CMPs) incorporating integrin-specific glycine-phenylalanine-hydroxyproline-glycine-glutamate-arginine (GFOGER) sequence from residues 502 to 507 of collagen alpha(1)(I) were used as a bioadhesive matrix and grafted onto poly(3-hydroxybutyrate-co3-hydroxyvalerate) microspheres to optimize cell adhesion, proliferation, and functions. Cell recognition of these biomolecules appeared to be conformation dependent, with the CMP1 of higher triple helix stability being preferred. Absence of the GFOGER hexapeptide in the CMP1' and CMP2' caused an adverse effect on the level of cell adhesion (<10%). The GFOGER-containing triple-helical CMPs effectively inhibited cell adhesion to collagen in a competition assay. The cell-adhesion activity of the CMP1 was approximately 50% of that of collagen. The cell spreading on the CMP1 was comparable with that observed on collagen. The presence of the CMP1 promoted cell attachment and spreading on the microspheres and extensive cell proliferation and bridging. Slower cell proliferation was observed on the blank microspheres. Live-dead assay showed that most cells are viable after 10-day culture. The presence of CMP1 on the microspheres maintained the albumin secretion and P-450 activity levels of the liver cells for up to 14 days. Our results established the potential of CMP1 to create a collagen-like microenvironment for optimizing cellular responses for liver tissue engineering.
Collapse
Affiliation(s)
- Shih Tak Khew
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore
| | | | | |
Collapse
|
27
|
Khew ST, Tong YW. The Specific Recognition of a Cell Binding Sequence Derived from Type I Collagen by Hep3B and L929 Cells. Biomacromolecules 2007; 8:3153-61. [PMID: 17854223 DOI: 10.1021/bm700587j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, the affinity of two different cell types toward a specific cell binding sequence (Gly-Phe-Hyp-Gly-Glu-Arg or GFOGER) derived from type I collagen using peptide template (PT)-assembled collagen peptides of different triple helicity as a model for natural collagen is examined. A series of biophysical studies, including melting curve analysis and circular dichroism spectroscopy, demonstrated the presence of stable triple-helical conformation in the PT-assembled (GPO)3-GFOGER-(GPO)3, (GPO)-GFOGER-(GPO), and (Pro-Hyp-Gly)5 solution. Conversely, non-templated peptides, except (GPO)3-GFOGER-(GPO)3, showed no evidence of assembly into triple-helical structure. Biological assays, including cell adhesion, competitive inhibition, and immunofluorescence staining, revealed a correlation of triple-helical conformation with the cellular recognition of GFOGER in an integrin-specific manner. The triple helix was shown to be important, but not crucial for cell adhesion to native collagen. Hep3B and L929 cells displayed significant differences in the recognition of GFOGER, mainly because of the differences in their expression of specific integrin receptors for collagen. For example, PT-assembled (GPO)3-GFOGER-(GPO)3 was shown to perform comparably to collagen for L929, but not Hep3B, cell adhesion. The result showed that a specific cell binding motif may not fully mimic the extracellular matrix (ECM) microenvironment, suggesting the need to use a combination of two or more cell binding sequences for targeting a wide range of integrin receptors expressed by a specific cell type to better mimic the ECM.
Collapse
Affiliation(s)
- Shih Tak Khew
- Department of Chemical & Biomolecular Engineering, and Division of Bioengineering, National University of Singapore, Singapore
| | | |
Collapse
|
28
|
Moby V, Boura C, Kerdjoudj H, Voegel JC, Marchal L, Dumas D, Schaaf P, Stoltz JF, Menu P. Poly(styrenesulfonate)/poly(allylamine) multilayers: a route to favor endothelial cell growth on expanded poly(tetrafluoroethylene) vascular grafts. Biomacromolecules 2007; 8:2156-60. [PMID: 17585807 DOI: 10.1021/bm070348n] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Small-diameter synthetic vascular grafts of expanded poly(tetrafluoroethylene) (ePTFE) polymer concern one of the most common alternatives for the replacement of diseased vessels. However, high failure rates arise especially due to the lack of endothelial cells (ECs). EC seeding was developed to build a monolayer on the luminal surface. Because ECs show little or no adhesion on synthetic prostheses, it is necessary to promote their retention. On ePTFE surfaces we successfully deposited polyelectrolyte multilayer films (PMFs) consisting of poly(ethylenimine) (PEI), poly(sodium 4-styrenesulfonate) (PSS), and poly(allylamine hydrochloride) (PAH) to obtain PEI-(PSS-PAH)3 films. EC adhesion and spreading on modified ePTFE were assessed by scanning electron and confocal microscopies. Cell viability was evaluated by Alamar Blue assay. After 7 days of culture, the ePTFE modified with PMF exhibited improvements of EC viability as compared to that of the controls (nonmodified ePTFE) or even ePTFE coated by a PAH monolayer (p < 0.05). Moreover, the spreading of ECs was largely enhanced compared to that of the same controls, resulting in a healthy confluent cell monolayer formation. Positive staining for the von Willebrand factor confirmed the EC phenotype. Promoting EC attachment and function on ePTFE modified with PMFs could become in the future a promising treatment for synthetic small-diameter vascular grafts.
Collapse
Affiliation(s)
- Vanessa Moby
- Mécanique et Ingénierie Cellulaire et Tissulaire, LEMTA-UMR CNRS 7563, Université Henri Poincaré - Nancy 1, Faculté de Médecine, Vandoeuvre-lès-Nancy, France
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Abstract
Polymers with modified surface structure are useful for medicine applications. This study is focused on the surface properties of polymers with carbon layers and their biocompatibility. For experiments was used polyethyleneterephtalate (PET). We used magnetron sputtering for producing of the carbon layers. Raman spectroscopy, goniometry, AFM – microscopy, X-ray diffraction and infrared spectroscopy were used in our experiments to describe the physicochemical properties of modified polymers. Biocompatibility of structure polymer-carbon layers was studied with method in vitro. We investigated adhesion of mouse 3T3-fibroblasts. The carbon layers have positive influence on biocompatibility.
Collapse
|
30
|
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.
Collapse
Affiliation(s)
- Theo G van Kooten
- Department of Biomedical Engineering (BME), University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
| | | | | |
Collapse
|
31
|
Gumpenberger T, Heitz J, Bäuerle D, Kahr H, Graz I, Romanin C, Svorcik V, Leisch F. Adhesion and proliferation of human endothelial cells on photochemically modified polytetrafluoroethylene. Biomaterials 2003; 24:5139-44. [PMID: 14568430 DOI: 10.1016/s0142-9612(03)00460-5] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We studied the adhesion and proliferation of human endothelial cells on photochemically modified polytetrafluoroethylene samples. The polymer surfaces were modified by exposure to the ultraviolet light of a Xe(2)(*)-excimer lamp at a wavelength of 172 nm in an ammonia atmosphere. Treatment times were between 10 and 20 min. The endothelial cell density was determined 1, 3 and 8 days after seeding by image analysis. Surface modification of the samples resulted in a significant increase in the number of adhering cells and in the formation of a confluent cell layer after 3-8 days. The results were comparable than those obtained on polystyrene Petri dishes, which are used as standard substrates in cell cultivation. Thus modified PTFE appears to be a promising material for the fabrication of artificial vascular prostheses coated with endothelial cells.
Collapse
Affiliation(s)
- T Gumpenberger
- Department of Applied Physics, Johannes Kepler University, Linz A-4040, Austria
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Heitz J, Svorcík V, Bacáková L, Rocková K, Ratajová E, Gumpenberger T, Bäuerle D, Dvoránková B, Kahr H, Graz I, Romanin C. Cell adhesion on polytetrafluoroethylene modified by UV-irradiation in an ammonia atmosphere. J Biomed Mater Res A 2003; 67:130-7. [PMID: 14517870 DOI: 10.1002/jbm.a.10043] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We report on the modification of polytetrafluoroethylene (PTFE) by exposure to the ultraviolet (UV) light of a Xe(2)*-excimer lamp at a wavelength of 172 nm in an ammonia atmosphere. Typical treatment times were up to 30 min. Subsequently, the samples were grafted with the amino acid alanine from an aqueous solution. The samples were characterized by means of optical transmission spectroscopy, laser-induced fluorescence and contact-angle measurements. We studied the adhesion of rat aortic smooth muscle cells (SMC) and mouse fibroblasts (3T3 cells) to the modified polymer samples using an in vitro technique, where the population density and spread of adhering cells is determined 24 h after seeding by image analysis. For both cell types the exposure of PTFE to UV-light in an ammonia atmosphere resulted in a significant increase in the number of adhering cells and in the size of their spreading area. The grafting with alanine enhanced this effect. Additional experiments with human endothelial cells (HEC) also demonstrated improved adhesion to modified PTFE. Thus, PTFE modified by our method appears to be a promising material for fabrication of artificial vascular prostheses and implants or for cultivation of skin substitutes.
Collapse
Affiliation(s)
- J Heitz
- Angewandte Physik, Johannes Kepler Universität, A-4040 Linz, Austria.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Walachová K, Svorcík V, Bacáková L, Hnatowicz V. Colonization of ion-modified polyethylene with vascular smooth muscle cells in vitro. Biomaterials 2002; 23:2989-96. [PMID: 12069341 DOI: 10.1016/s0142-9612(02)00029-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Polyethylene (PE) foils were implanted with 40 and 150 keV Ar+ ions to the fluences from 1 x 10(13) to 1 x 10(15) cm(-2). Production of conjugated double bonds, characterizing degradation of the PE surface layer, was studied using UV-VIS spectroscopy. Wettability of the PE surface, determined by conventional goniometric techniques, was shown to be an increasing function of both ion energy and fluence. It was also increased after exposure of PE to serum-supplemented cell culture media. Cell culture experiments showed that the ion irradiation significantly increased the adherence of vascular smooth muscle cells (VSMC) and their subsequent growth on the PE surface. On day 1 after seeding, the number of initially adhered VSMC exhibited two maxima. On day 3 after seeding. these maxima disappeared, which was partially due to a significantly shorter doubling time of VSMC. On the other ion-modified samples. the doubling time did not differ significantly from that on the unmodified PE. Enzyme-linked immunosorbent assay revealed increased concentration of talin, a protein of focal adhesion plaques, and alpha-actin, a marker of VSMC differentiation, in cells on ion-implanted surfaces. It can be concluded that the ion irradiation supports the adhesion and differentiation of VSMC without excessive proliferation of these cells.
Collapse
Affiliation(s)
- K Walachová
- Department of Solid State Engineering, Institute of Chemical Technology, Prague, Czech Republic
| | | | | | | |
Collapse
|
34
|
Bacáková L, Walachová K, Svorcík V, Hnatowicz V. Adhesion and proliferation of rat vascular smooth muscle cells (VSMC) on polyethylene implanted with O+ and C+ ions. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2002; 12:817-34. [PMID: 11587043 DOI: 10.1163/156856201750411684] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Polyethylene was implanted with 30-keV oxygen (PE/O+) or 23-keV carbon ions (PE/C+) at 10(13) to 5 x 10(15) ions cm(-2) doses in order to improve the adhesion of vascular smooth muscle cell (VSMC) to the polymer surface in vitro because of its oxidation and carbon-enrichment. The concentration of -CO- groups in the PE/O+ and PE/C+ samples increased only up to doses of 3 x 10(14) and 10(15) ions cm(-2), respectively, and then declined. At the same time, the concentration of these groups, measured at a dose of 3 x 10(14) ions cm(-2), was higher in PE/O+ than in PE/C+ samples. Similarly, the number of initially-adhering rat VSMC (24 h after seeding) increased only up to a dose of 3 x 10(13) and 10(15) ions cm(-2) on PE/O+ and PE/C+ samples, respectively. In addition, between doses of 10(13) and 10(14) ions cm(-2), this number was about two to three times higher on PE/O+ samples. On the other hand, the surface wettability increased proportionally to the implanted ion dose, especially above a dose of 10(14) ions cm(-2). Thus, the number of initially-adhered cells appeared to be positively correlated with the amount of the oxygen group present at the polymer surface rather than with the surface wettability. The higher cell adhesion was accompanied by adsorption of fluorescent dye-conjugated collagen IV in larger amounts. The highest numbers of initially-adhered cells were usually associated with the lowest rates of subsequent proliferation (measured by the doubling time, BrdU labelling and M
Collapse
Affiliation(s)
- L Bacáková
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague.
| | | | | | | |
Collapse
|
35
|
Bacáková L, Mares V, Lisá V, Svorcík V. Molecular mechanisms of improved adhesion and growth of an endothelial cell line cultured on polystyrene implanted with fluorine ions. Biomaterials 2000; 21:1173-9. [PMID: 10817270 DOI: 10.1016/s0142-9612(00)00009-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Endothelial cells derived from the bovine pulmonary artery (line CPAE, CCL 209, American Tissue Culture Collection, Rockville, MD, USA) were cultured on pristine or fluorine ion-irradiated polystyrene (5 x 10(12) or 5 x 10(14) F ions/cm2, 150 keV). At 24-h post-seeding interval, the number of cells which adhered to the ion-modified polystyrene was significantly higher than on the unmodified material (+20 and +58% in cultures with the polystyrene irradiated by lower and higher ion doses, respectively). On day 7, the populations cultured on the irradiated substrates grew to higher densities, exceeding the controls at the lower and higher ion doses by 69 and 180%, respectively. The cells on ion-implanted samples were also larger (+70-95% and +90-99% at the lower and higher ion doses, respectively) and contained more protein (+16% at both ion doses). As was shown by ELISA, the polystyrene irradiated by the higher ion dose enhanced the expression of a cytoskeletal protein, vimentin (+65%) and protein of focal adhesion plaques, talin (+15%). The content of integrin alpha5beta1 (VLA-5), receptor for fibronectin, was increased at both lower and higher ion doses (+22 and +57%). In contrast to this, the content of ICAM-1 and vinculin was similar in cells grown on both pristine and ion-irradiated growth substrates. Moreover, the expression of VCAM-1 and ELAM-1 was lower by 11-14% in both ion dose groups. The present study has shown that ion implantation of polymers improves the adhesion and growth of endothelial cells without elevating the expression of immunoglobulin and selectin types of adhesion molecules. This surface modification should promote colonization of an artificial vascular prosthesis by endothelial cells and make it less vulnerable by immune system cells of the recipient.
Collapse
Affiliation(s)
- L Bacáková
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague.
| | | | | | | |
Collapse
|
36
|
Polishing and coating carbon fiber-reinforced carbon composites with a carbon-titanium layer enhances adhesion and growth of osteoblast-like MG63 cells and vascular smooth muscle cellsin vitro. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1097-4636(20010315)54:4<567::aid-jbm140>3.0.co;2-y] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|