1
|
Yan M, Hartjen P, Gosau M, Vollkommer T, Grust ALC, Fuest S, Kluwe L, Burg S, Smeets R, Henningsen A. Effects of a Novel Cold Atmospheric Plasma Treatment of Titanium on the Proliferation and Adhesion Behavior of Fibroblasts. Int J Mol Sci 2021; 23:ijms23010420. [PMID: 35008846 PMCID: PMC8745755 DOI: 10.3390/ijms23010420] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/18/2021] [Accepted: 12/28/2021] [Indexed: 12/19/2022] Open
Abstract
Cold plasma treatment increases the hydrophilicity of the surfaces of implants and may enhance their integration with the surrounding tissues. The implaPrep prototype device from Relyon Plasma generates cold atmospheric plasma via dielectric barrier discharge (DBD). In this study, titanium surfaces were treated with the implaPrep device for 20 s and assessed as a cell culture surface for fibroblasts. One day after seeding, significantly more cells were counted on the surfaces treated with cold plasma than on the untreated control titanium surface. Additionally, the viability assay revealed significantly higher viability on the treated surfaces. Morphological observation of the cells showed certain differences between the treated and untreated titanium surfaces. While conventional plasma devices require compressed gas, such as oxygen or argon, the implaPrep device uses atmospheric air as the gas source. It is, therefore, compact in size and simple to handle, and may provide a safe and convenient tool for treating the surfaces of dental implants, which may further improve the implantation outcome.
Collapse
Affiliation(s)
- Ming Yan
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
- Correspondence: ; Tel.: +49-152-2690-8655; Fax: +49-407-4105-9665
| | - Philip Hartjen
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| | - Martin Gosau
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| | - Tobias Vollkommer
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| | - Audrey Laure Céline Grust
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| | - Sandra Fuest
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany;
| | - Lan Kluwe
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| | - Simon Burg
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany;
| | - Anders Henningsen
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (P.H.); (M.G.); (T.V.); (A.L.C.G.); (L.K.); (S.B.); (R.S.); (A.H.)
| |
Collapse
|
2
|
Tan F, Fang Y, Zhu L, Al-Rubeai M. Cold atmospheric plasma as an interface biotechnology for enhancing surgical implants. Crit Rev Biotechnol 2021; 41:425-440. [PMID: 33622112 DOI: 10.1080/07388551.2020.1853671] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cold atmospheric plasma (CAP) has been intensively researched for direct treatment of living cells and tissues. Significant attention is now being given to its indirect applications in plasma medicine. Surgical implant is an exemplary conveyor to deliver the therapeutic effects of plasma to patients. There is a constant drive to enhance the clinical performance of surgical implants, targeting at the implant-tissue interface. As a versatile and potent tool, CAP is capable of ameliorating surgical implants using various strategies of interface biotechnology, such as surface modification, coating deposition, and drug delivery. Understanding the chemical, physical, mechanical, electrical, and pharmacological processes occurring at the implant-tissue interface is crucial to effective application of CAP as an interface biotechnology. This preclinical review focuses on the recent advances in CAP-assisted implant-based therapy for major surgical specialties. The ultimate goal here is to elicit unique opportunities and challenges for translating implant science to plasma medicine.
Collapse
Affiliation(s)
- Fei Tan
- Department of ORL-HNS, Affiliated East Hospital of Tongji University, Shanghai, China.,School of Medicine and Institute for Advanced Study, Tongji University, Shanghai, China.,The Royal College of Surgeons of England, London, UK
| | - Yin Fang
- School of Medicine and Institute for Advanced Study, Tongji University, Shanghai, China
| | - Liwei Zhu
- Department of ORL-HNS, Affiliated East Hospital of Tongji University, Shanghai, China
| | - Mohamed Al-Rubeai
- School of Chemical and Bioprocess Engineering, and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| |
Collapse
|
3
|
Mehrban N, Cardinale D, Gallo SC, Lee DDH, Arne Scott D, Dong H, Bowen J, Woolfson DN, Birchall MA, O'Callaghan C. α-Helical peptides on plasma-treated polymers promote ciliation of airway epithelial cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 122:111935. [PMID: 33641925 DOI: 10.1016/j.msec.2021.111935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/11/2021] [Accepted: 01/30/2021] [Indexed: 11/30/2022]
Abstract
Airway respiratory epithelium forms a physical barrier through intercellular tight junctions, which prevents debris from passing through to the internal environment while ciliated epithelial cells expel particulate-trapping mucus up the airway. Polymeric solutions to loss of airway structure and integrity have been unable to fully restore functional epithelium. We hypothesised that plasma treatment of polymers would permit adsorption of α-helical peptides and that this would promote functional differentiation of airway epithelial cells. Five candidate plasma compositions are compared; Air, N2, H2, H2:N2 and Air:N2. X-ray photoelectron spectroscopy shows changes in at% N and C 1s peaks after plasma treatment while electron microscopy indicates successful adsorption of hydrogelating self-assembling fibres (hSAF) on all samples. Subsequently, adsorbed hSAFs support human nasal epithelial cell attachment and proliferation and induce differentiation at an air-liquid interface. Transepithelial measurements show that the cells form tight junctions and produce cilia beating at the normal expected frequency of 10-11 Hz after 28 days in culture. The synthetic peptide system described in this study offers potential superiority as an epithelial regeneration substrate over present "gold-standard" materials, such as collagen, as they are controllable and can be chemically functionalised to support a variety of in vivo environments. Using the hSAF peptides described here in combination with plasma-treated polymeric surfaces could offer a way of improving the functionality and integration of implantable polymers for aerodigestive tract reconstruction and regeneration.
Collapse
Affiliation(s)
- Nazia Mehrban
- UCL Ear Institute, University College London, 332 Grays Inn Rd, London WC1X 8EE, UK.
| | - Daniela Cardinale
- Infection, Immunity and Inflammation Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford St, London WC1N 1EH, UK
| | - Santiago C Gallo
- Institute for Frontier Materials, Deakin University, 75 Pigdons Rd, Victoria, VIC 3216, Australia
| | - Dani D H Lee
- Infection, Immunity and Inflammation Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford St, London WC1N 1EH, UK
| | - D Arne Scott
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
| | - Hanshan Dong
- School of Metallurgy and Materials, University of Birmingham, Elms Rd, Birmingham B15 2SE, UK
| | - James Bowen
- School of Engineering & Innovation, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
| | - Derek N Woolfson
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK; School of Biochemistry, University of Bristol, University Walk, Bristol BS8 1TD, UK; Bristol BioDesign Institute, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Martin A Birchall
- UCL Ear Institute, University College London, 332 Grays Inn Rd, London WC1X 8EE, UK
| | - Christopher O'Callaghan
- Infection, Immunity and Inflammation Department, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford St, London WC1N 1EH, UK
| |
Collapse
|
4
|
Humeres E, de Castro KM, Debacher NA, Moreira RDFPM. Reaction Mechanism of the Reduction of Ozone on Graphite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11225-11236. [PMID: 32857524 DOI: 10.1021/acs.langmuir.0c01372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The kinetics of the ozonation of graphite with different particle sizes (106 μm, G106; 6.20 μm, G6.2) was studied at several temperatures under a flow of O3 diluted in O2. The reaction was first-order with respect to graphite and to the consumption of ozone. X-ray photoelectron spectrum (XPS) showed that the reactions occurring in the solid under steady-state conditions maintain the original stoichiometry, as predicted by the postulated mechanism for SO2. The deoxygenation reaction occurred along with the ozonation reaction at 100 °C. The rate of oxygen elimination in the flow system has the same rate-determining kinetic barrier as ozone insertion. Ozonation and deoxygenation reactions are sequentially related. Ozonation occurs with the insertion of O3, forming a 1,2,3-trioxolane followed by an oxygen transfer that produces a peroxide valence tautomer in equilibrium with 1,3-dicarbonyl, [peroxide ↔ dicarbonyl], and an oxirene that eliminates atomic oxygen. The decarboxylation reaction was studied at 600 °C from the ozonated G106 (ΔG≠ = 83.60 ± 0.08 kcal·mol-1). Total decarboxylation at 600 °C matched the number of moles of CO2 removed and the oxygen content after ozonation, showing that the reduction of ozone on graphite was essentially a clean reduction with no secondary oxidations. When ozonized graphite was heated to 600 °C, only [peroxide ↔ dicarbonyl] species remained in the matrix. The peroxide tautomer isomerized to dioxirane and eliminated CO2 as a dioxicarbene. Total deoxygenation of decarboxylated graphite G106 was obtained by pyrolysis. There was residual oxygen that arose from the atomic oxygen eliminated from the oxirene, intercalated in graphite layers, and formed basal epoxy groups. Also, incoming O atoms reacted with the intercalated O atoms to produce O2 molecules. Thermal annealing deintercalated molecular oxygen (600-900 °C).
Collapse
|
5
|
Dryakhlov VO, Shaikhiev IG, Galikhanov MF, Sverguzova SV. Modification of Polymeric Membranes by Corona Discharge. MEMBRANES AND MEMBRANE TECHNOLOGIES 2020. [DOI: 10.1134/s2517751620030038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
Effect of tetrahydrofuran on poly(methyl methacrylate) and silica in the interfacial regions of polymer nanocomposites. Polym J 2020. [DOI: 10.1038/s41428-020-0375-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
7
|
Pellacani P, Morasso C, Picciolini S, Gallach D, Fornasari L, Marabelli F, Manso Silvan M. Plasma Fabrication and SERS Functionality of Gold Crowned Silicon Submicrometer Pillars. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1244. [PMID: 32164146 PMCID: PMC7085028 DOI: 10.3390/ma13051244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/03/2020] [Accepted: 03/05/2020] [Indexed: 12/13/2022]
Abstract
Sequential plasma processes combined with specific lithographic methods allow for the fabrication of advanced material structures. In the present work, we used self-assembled colloidal monolayers as lithographic structures for the conformation of ordered Si submicrometer pillars by reactive ion etching. We explored different discharge conditions to optimize the Si pillar geometry. Selected structures were further decorated with gold by conventional sputtering, prior to colloidal monolayer lift-off. The resulting structures consist of a gold crown, that is, a cylindrical coating on the edge of the Si pillar and a cavity on top. We analysed the Au structures in terms of electronic properties by using X-ray absorption spectroscopy (XAS) prior to and after post-processing with thermal annealing at 300 °C and/or interaction with a gold etchant solution (KI). The angular dependent analysis of the plasmonic properties was studied with Fourier transformed UV-vis measurements. Certain conditions were selected to perform a surface enhanced Raman spectroscopy (SERS) evaluation of these platforms with two model dyes, prior to confirming the potential interest for a well-resolved analysis of filtered blood plasma.
Collapse
Affiliation(s)
- Paola Pellacani
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (P.P.); or
- Plasmore S.r.l., Via Vittorio Emanuele II 4, 27100 Pavia, Italy;
| | - Carlo Morasso
- Istituti Clinici Scientifici Maugeri IRCCS, via Maugeri 4, 27100 Pavia, Italy;
| | - Silvia Picciolini
- IRCCS Fondazione Don Carlo Gnocchi, Via Capecelatro 66, 20148 Milano, Italy;
| | - Dario Gallach
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (P.P.); or
- Departamento de Ciencia, Computación y Tecnología, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Madrid, Spain
| | - Lucia Fornasari
- Plasmore S.r.l., Via Vittorio Emanuele II 4, 27100 Pavia, Italy;
| | - Franco Marabelli
- Physics Department, University of Pavia. via A.Bassi, 6. I-27100, Pavia, Italy;
| | - Miguel Manso Silvan
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (P.P.); or
| |
Collapse
|
8
|
Controlled Release of 5‐Fluorouracil from Alginate Hydrogels by Cold HMDSO−Plasma Surface Engineering. ChemistrySelect 2020. [DOI: 10.1002/slct.201904449] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
9
|
Dalei G, Das S, Das SP. Low-pressure nitrogen and ammonia plasma treatment on carboxymethyl guar gum/PVA hydrogels: impact on drug delivery, biocompatibility and biodegradability. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1695204] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ganeswar Dalei
- Plasma Research Laboratory, Department of Chemistry, Ravenshaw University, Cuttack, Odisha, 753003, India
| | - Subhraseema Das
- Plasma Research Laboratory, Department of Chemistry, Ravenshaw University, Cuttack, Odisha, 753003, India
| | - Smruti Prava Das
- Plasma Research Laboratory, Department of Chemistry, Ravenshaw University, Cuttack, Odisha, 753003, India
| |
Collapse
|
10
|
Cold atmospheric plasma surface nanoengineered carboxymethyl cellulose hydrogels as oral ibuprofen carriers. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1372-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
|
11
|
Square prism micropillars on poly(methyl methacrylate) surfaces modulate the morphology and differentiation of human dental pulp mesenchymal stem cells. Colloids Surf B Biointerfaces 2019; 178:44-55. [PMID: 30826553 DOI: 10.1016/j.colsurfb.2019.02.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 12/16/2022]
Abstract
Use of soluble factors is the most common strategy to induce osteogenic differentiation of mesenchymal stem cells (MSCs) in vitro, but it may raise potential side effects in vivo. The topographies of the substrate surfaces affect cell behavior, and this could be a promising approach to guide stem cell differentiation. Micropillars have been reported to modulate cellular and subcellular shape, and it is particularly interesting to investigate whether these changes in cell morphology can modulate gene expression and lineage commitment without chemical induction. In this study, poly(methyl methacrylate) (PMMA) films were decorated with square prism micropillars with different lateral dimensions (4, 8 and 16 μm), and the surface wettability of the substrates was altered by oxygen plasma treatment. Both, pattern dimensions and hydrophilicity, were found to affect the attachment, proliferation, and most importantly, gene expression of human dental pulp mesenchymal stem cells (DPSCs). Decreasing the pillar width and interpillar spacing of the square prism pillars enhanced cell attachment, cell elongation, and deformation of nuclei, but reduced early proliferation rate. Surfaces with 4 or 8 μm wide pillars/gaps upregulated the expression of early bone-marker genes and mineralization over 28 days of culture. Exposure to oxygen plasma increased wettability and promoted cell attachment and proliferation but delayed osteogenesis. Our findings showed that surface topography and chemistry are very useful tools in controlling cell behavior on substrates and they can also help create better implants. The most important finding is that hydrophobic micropillars on polymeric substrate surfaces can be exploited in inducing osteogenic differentiation of MSCs without any differentiation supplements.
Collapse
|
12
|
Dalei G, Das S, Das SP. Non-thermal plasma assisted surface nano-textured carboxymethyl guar gum/chitosan hydrogels for biomedical applications. RSC Adv 2019; 9:1705-1716. [PMID: 35518016 PMCID: PMC9059754 DOI: 10.1039/c8ra09161g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 11/07/2019] [Accepted: 01/04/2019] [Indexed: 12/30/2022] Open
Abstract
Smart hydrogels comprising carboxymethyl guar gum and chitosan (CMGG/CS) have been fabricated using tetraethyl orthosilicate as the crosslinker. To render the hydrogels an improved biological efficacy, non-thermal plasma assisted surface modification have been performed using Ar, O2 and a mixture of Ar and O2 gases. Enhanced surface wettability was witnessed post-plasma treatment. AFM analyses revealed the topographical changes of the hydrogels at the nano-scale level without any adverse effect on their bulk physical structure. The hydrogels exhibited pH-responsive swelling with maximum swelling in neutral pH. The release of diclofenac sodium from the hydrogels confirmed their potential towards colon-targeted drug delivery. Excellent biofilm eradication features against E. coli was demonstrated by the hydrogels. Hemolytic assay on human RBCs affirmed their hemocompatibility. Moreover, the hydrogels were found to be remarkably biodegradable. Thus, non-thermal plasma assisted surface nano-textured CMGG/CS hydrogels can be efficaciously explored for their diverse applications in biomedicine. Surface nano-textured carboxymethyl guar gum/chitosan smart hydrogels by non-thermal plasma for biomedical applications.![]()
Collapse
|
13
|
Surface Modifications of the PMMA Optic of a Keratoprosthesis to Improve Biointegration. Cornea 2018; 36 Suppl 1:S15-S25. [PMID: 28968294 DOI: 10.1097/ico.0000000000001352] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Biointegration of a keratoprosthesis (KPro) is critical for the mitigation of various long-term postoperative complications. Biointegration of a KPro occurs between the haptic skirt (corneal graft) and the central optic [poly(methyl methacrylate) (PMMA)]. Various studies have highlighted common problems associated with poor bonding and biointegration between these 2 incompatible biomaterials. Resolution of these issues could be achieved by surface modification of the inert material (PMMA). A calcium phosphate (CaP) coating deposited on dopamine-activated PMMA sheets by simulated body fluid incubation (d-CaP coating) was shown to improve adhesion to collagen type I (main component of corneal stroma) compared with untreated PMMA and PMMA with other surface modifications. However, the d-CaP coating could easily undergo delamination, thereby reducing its potential for modification of KPro optical cylinders. In addition, the coating did not resemble the Ca and P composition of hydroxyapatite (HAp). A novel dip-coating method that involves the creation of cavities to trap and immobilize HAp nanoparticles on the PMMA surface was introduced to address the problems associated with the d-CaP coating. The newly obtained coating offered high hydrophilicity, resistance to delamination, and preservation of the Ca and P composition of HAp. These advantages resulted in improved adhesion strength by more than 1 order of magnitude compared with untreated PMMA. With respect to biointegration, human corneal stromal fibroblasts were able to adhere strongly and proliferate on HAp-coated PMMA. Furthermore, the new coating technique could be extended to immobilization of HAp nanoparticles on 3-mm-diameter PMMA cylinders, bringing it closer to clinical application.
Collapse
|
14
|
Padilha GDS, Giacon VM, Bartoli JR. Effect of solvents on the morphology of PMMA films fabricated by spin-coating. POLIMEROS 2017. [DOI: 10.1590/0104-1428.12516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Barrera-Ortega CC, Hoz-Rodríguez L, Arzate H, Fonseca-García A, Pérez-Alvarez J, Rodil SE. Comparison of the osteogenic, adipogenic, chondrogenic and cementogenic differentiation potential of periodontal ligament cells cultured on different biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:1075-1084. [PMID: 28482471 DOI: 10.1016/j.msec.2017.03.213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 02/28/2017] [Accepted: 03/23/2017] [Indexed: 11/18/2022]
Abstract
It has been shown that the cellular responses such as adhesion, proliferation and differentiation are influenced by the surface properties, such as the topography or the surface energy. However, less is known about the effect of the chemical composition and type of material on the differentiation potential. The objective of the present paper is to compare the differentiation potential of periodontal ligament cells (HPLC) into adipocytes, osteoblasts, chondroblasts and cementoblasts of three type of materials (metals, ceramics and polymers) without using any biological induction media, but keeping the average roughness values within a limited range of 2.0-3.0μm. The samples were produced as discs of 14×2mm; (n=30 for each type of material). Two samples of each type were chosen; stainless-steel 316L and commercially pure titanium for the metallic samples. The polymers were polymethyl methacrylate and high-density polyethylene, and finally for the ceramics; zirconia and dental porcelain were used. The surfaces properties of the samples (wettability, chemical composition and point of zero charge, PZC) were measured in order to correlate them with the biological response. To evaluate the potential of differentiation, human periodontal ligament cells obtained from extracted teeth were used since they are a promising source for periodontal tissue regeneration. Cell proliferation was initially tested to assure non-toxic effects using a viability colorimetric assay. Finally, the differentiation pattern was evaluated using real time reverse transcription quantitative polymerase chain reaction for 5, 10 and 15days without adding any induction medium. The results indicated that the relative expression of genes related to a particular phenotype were different for each surface. However, not clear correlation between the type of material or their surface properties (morphology, chemical composition, wettability or point of zero charge) and the expression pattern could be identified. For example, bone markers were mainly expressed on cpTi and PMMA; one metallic hydrophobic and one polymeric hydrophilic sample which have similar Ra values but presented different topographical features, although both samples have in common a PZC below 7.
Collapse
Affiliation(s)
- C C Barrera-Ortega
- Laboratorio de Biología Periodontal, División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Circuito exterior s/n, Ciudad Universitaria, 04510 México CDMX, México; Programa de Maestría y Doctorado en Ciencias Médicas, Odontológicas y de la Salud, UNAM, Unidad de Posgrado, Zona Cultural de Ciudad Universitaria, México CDMX 04510, México
| | - L Hoz-Rodríguez
- Laboratorio de Biología Periodontal, División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Circuito exterior s/n, Ciudad Universitaria, 04510 México CDMX, México
| | - H Arzate
- Laboratorio de Biología Periodontal, División de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Nacional Autónoma de México, Circuito exterior s/n, Ciudad Universitaria, 04510 México CDMX, México
| | - A Fonseca-García
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, 04510 México CDMX, México; Posgrado en Ciencia e Ingeniería de Materiales, UNAM, Unidad de Posgrado, Edificio C, Piso 1, Zona Cultural de CU, México CDMX 04510, México
| | - J Pérez-Alvarez
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, 04510 México CDMX, México
| | - S E Rodil
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, 04510 México CDMX, México.
| |
Collapse
|
16
|
Conzatti G, Cavalie S, Combes C, Torrisani J, Carrere N, Tourrette A. PNIPAM grafted surfaces through ATRP and RAFT polymerization: Chemistry and bioadhesion. Colloids Surf B Biointerfaces 2017; 151:143-155. [DOI: 10.1016/j.colsurfb.2016.12.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/25/2016] [Accepted: 12/07/2016] [Indexed: 12/23/2022]
|
17
|
Trimukhe AM, Pandiyaraj KN, Tripathi A, Melo JS, Deshmukh RR. Plasma Surface Modification of Biomaterials for Biomedical Applications. ADVANCED STRUCTURED MATERIALS 2017. [DOI: 10.1007/978-981-10-3328-5_3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
18
|
Moroi A, Okuno M, Kobayashi G, Gamo H, Serizawa I, Yoshizawa K, Ikawa H, Ueki K. Effect on surface character and mechanical property of unsintered hydroxyapatite/poly-l
-lactic acid (uHA/PLLA) material by UV treatment. J Biomed Mater Res B Appl Biomater 2016; 106:191-200. [DOI: 10.1002/jbm.b.33833] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/24/2016] [Accepted: 12/01/2016] [Indexed: 01/21/2023]
Affiliation(s)
- Akinori Moroi
- Department of Oral and Maxillofacial Surgery, Division of Clinical Medicine, Graduate Faculty of Interdisciplinary Research; University of Yamanashi, 1110 Shimokato; Chuo Yamanashi Japan
| | - Masaki Okuno
- Depatment of Medical Institure; Takiron Co. Ltd, 7-1-9, Minatojimaminamimachi, Chuo-ku; Kobe Hyogo Japan
| | - Go Kobayashi
- Suwa factory ORC Manufacturing Co., Ltd, 4896 Tamagawa; Chinoshi Nagano Japan
| | - Hitoshi Gamo
- Suwa factory ORC Manufacturing Co., Ltd, 4896 Tamagawa; Chinoshi Nagano Japan
| | - Izumi Serizawa
- Suwa factory ORC Manufacturing Co., Ltd, 4896 Tamagawa; Chinoshi Nagano Japan
| | - Kunio Yoshizawa
- Department of Oral and Maxillofacial Surgery, Division of Clinical Medicine, Graduate Faculty of Interdisciplinary Research; University of Yamanashi, 1110 Shimokato; Chuo Yamanashi Japan
| | - Hiroumi Ikawa
- Department of Oral and Maxillofacial Surgery, Division of Clinical Medicine, Graduate Faculty of Interdisciplinary Research; University of Yamanashi, 1110 Shimokato; Chuo Yamanashi Japan
| | - Koichiro Ueki
- Department of Oral and Maxillofacial Surgery, Division of Clinical Medicine, Graduate Faculty of Interdisciplinary Research; University of Yamanashi, 1110 Shimokato; Chuo Yamanashi Japan
| |
Collapse
|
19
|
Hasturk O, Sivas A, Karasozen B, Demirci U, Hasirci N, Hasirci V. Quantification of Type, Timing, and Extent of Cell Body and Nucleus Deformations Caused by the Dimensions and Hydrophilicity of Square Prism Micropillars. Adv Healthc Mater 2016; 5:2972-2982. [PMID: 27925459 DOI: 10.1002/adhm.201600857] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/21/2016] [Indexed: 01/30/2023]
Abstract
Novel digital analysis strategies are developed for the quantification of changes in the cytoskeletal and nuclear morphologies of mesenchymal stem cells cultured on micropillars. Severe deformations of nucleus and distinct conformational changes of cell body ranging from extensive elongation to branching are visualized and quantified. These deformations are caused mainly by the dimensions and hydrophilicity of the micropillars.
Collapse
Affiliation(s)
- Onur Hasturk
- Graduate Department of Biotechnology; Middle East Technical University (METU); Ankara 06800 Turkey
- BIOMATEN; Center of Excellence in Biomaterials and Tissue Engineering; Middle East Technical University (METU); Ankara 06800 Turkey
| | - Abdullah Sivas
- Institute of Applied Mathematics; Middle East Technical University (METU); Ankara 06800 Turkey
| | - Bulent Karasozen
- Institute of Applied Mathematics; Middle East Technical University (METU); Ankara 06800 Turkey
| | - Utkan Demirci
- Bio-Acoustic-MEMs in Medicine (BAMM) Laboratory; Stanford School of Medicine; Palo Alto CA 94394 USA
| | - Nesrin Hasirci
- Graduate Department of Biotechnology; Middle East Technical University (METU); Ankara 06800 Turkey
- BIOMATEN; Center of Excellence in Biomaterials and Tissue Engineering; Middle East Technical University (METU); Ankara 06800 Turkey
- Department of Chemistry; Middle East Technical University (METU); Ankara 06800 Turkey
| | - Vasif Hasirci
- Graduate Department of Biotechnology; Middle East Technical University (METU); Ankara 06800 Turkey
- BIOMATEN; Center of Excellence in Biomaterials and Tissue Engineering; Middle East Technical University (METU); Ankara 06800 Turkey
- Department of Biological Sciences; Middle East Technical University (METU); Ankara 06800 Turkey
| |
Collapse
|
20
|
He XL, Zhao YX, Ge LL, An HQ, Su Y, Jin ZL, Wei DS, Chen L. Micropatterned fabrication of chitosan-based thermoresponsive membranes for improving cell adhesion and gene expression. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911515623080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A simple, rapid, and economical method to fabricate micropatterned thermoresponsive chitosan membranes was developed. Porous polystyrene films were prepared by liquid-induced phase separation. The size of pores on polystyrene films could be regulated by adjusting the composition of coagulation bath and changing the solvent evaporation rate. Subsequently, chitosan-based thermoresponsive membranes with island protrusions were fabricated using porous polystyrene films as templates. The effects of the micropatterns on the behaviors of mouse fibroblast L929 were investigated. The presence of micropatterns altered the cell cycle distribution and enhanced the gene expression of cyclin D1 and integrin β1. The micro-convex surface could promote the adhesion and proliferation of L929 cells. These results provided valuable guidance to design appropriate topographic surfaces for tissue engineering applications.
Collapse
Affiliation(s)
- Xiao-Ling He
- School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin, China
| | - Yu-Xin Zhao
- School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Li-Li Ge
- School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Hui-qin An
- School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Yu Su
- School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Zhen-Li Jin
- School of Environment and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China
| | - Dong-Sheng Wei
- College of Life Sciences, Nankai University, Tianjin, China
| | - Li Chen
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin, China
| |
Collapse
|
21
|
Surucu S, Turkoglu Sasmazel H. DBD atmospheric plasma-modified, electrospun, layer-by-layer polymeric scaffolds for L929 fibroblast cell cultivation. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 27:111-32. [PMID: 26494511 DOI: 10.1080/09205063.2015.1111717] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This paper reported a study related to atmospheric pressure dielectric barrier discharge (DBD) Ar + O2 and Ar + N2 plasma modifications to alter surface properties of 3D PCL/Chitosan/PCL layer-by-layer hybrid scaffolds and to improve mouse fibroblast (L929 ATCC CCL-1) cell attachment, proliferation, and growth. The scaffolds were fabricated using electrospinning technique and each layer was electrospun sequentially on top of the other. The surface modifications were performed with an atmospheric pressure DBD plasma under different gas flow rates (50, 60, 70, 80, 90, and 100 sccm) and for different modification times (0.5-7 min), and then the chemical and topographical characterizations of the modified samples were done by contact angle (CA) measurements, scanning electron microscopy (SEM), atomic force microscopy, and X-ray photoelectron spectroscopy. The samples modified with Ar + O2 plasma for 1 min under 70 cm(3)/min O2 flow rate (71.077° ± 3.578) showed a 18.83% decrease compare to unmodified samples' CA value (84.463° ± 3.864). Comparing with unmodified samples, the average fiber diameter values for plasma-modified samples by Ar + O2 (1 min 70 sccm) and Ar + N2 (40 s 70 sccm) increased 40.756 and 54.295%, respectively. Additionally, the average inter-fiber pore size values exhibited decrease of 37.699 and 48.463% for the same Ar + O2 and Ar + N2 plasma-modified samples, respectively, compare to unmodified samples. Biocompatibility performance was determined with MTT assay, fluorescence, Giemsa, and confocal imaging as well as SEM. The results showed that Ar + O2-based plasma modification increased the hydrophilicity and oxygen functionality of the surface, thus affecting the cell viability and proliferation on/within scaffolds.
Collapse
Affiliation(s)
- Seda Surucu
- a Department of Metallurgical and Materials Engineering , Atilim University , Ankara , Turkey
| | - Hilal Turkoglu Sasmazel
- a Department of Metallurgical and Materials Engineering , Atilim University , Ankara , Turkey
| |
Collapse
|
22
|
Increased Mesenchymal Stem Cell Response and Decreased Staphylococcus aureus Adhesion on Titania Nanotubes without Pharmaceuticals. BIOMED RESEARCH INTERNATIONAL 2015; 2015:172898. [PMID: 26640782 PMCID: PMC4657074 DOI: 10.1155/2015/172898] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 09/20/2015] [Accepted: 10/20/2015] [Indexed: 12/18/2022]
Abstract
Titanium (Ti) implants with enhanced biocompatibility and antibacterial property are highly desirable and characterized by improved success rates. In this study, titania nanotubes (TNTs) with various tube diameters were fabricated on Ti surfaces through electrochemical anodization at 10, 30, and 60 V (denoted as NT10, NT30, and NT60, resp.). Ti was also investigated and used as a control. NT10 with a diameter of 30 nm could promote the adhesion and proliferation of bone marrow mesenchymal stem cells (BMSCs) without noticeable differentiation. NT30 with a diameter of 100 nm could support the adhesion and proliferation of BMSCs and induce osteogenesis. NT60 with a diameter of 200 nm demonstrated the best ability to promote cell spreading and osteogenic differentiation; however, it clearly impaired cell adhesion and proliferation. As the tube diameter increased, bacterial adhesion on the TNTs decreased and reached the lowest value on NT60. Therefore, NT30 without pharmaceuticals could be used to increase mesenchymal stem cell response and decrease Staphylococcus aureus adhesion and thus should be further studied for improving the efficacy of Ti-based orthopedic implants.
Collapse
|
23
|
Riau AK, Mondal D, Yam GHF, Setiawan M, Liedberg B, Venkatraman SS, Mehta JS. Surface Modification of PMMA to Improve Adhesion to Corneal Substitutes in a Synthetic Core-Skirt Keratoprosthesis. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21690-21702. [PMID: 26389670 DOI: 10.1021/acsami.5b07621] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Patients with advanced corneal disease do poorly with conventional corneal transplantation and require a keratoprosthesis (KPro) for visual rehabilitation. The most widely used KPro is constructed using poly(methyl methacrylate) (PMMA) in the central optical core and a donor cornea as skirt material. In many cases, poor adherence between the PMMA and the soft corneal tissue is responsible for device "extrusion" and bacterial infiltration. The interfacial adhesion between the tissue and the PMMA was therefore critical to successful implantation and device longevity. In our approach, we modified the PMMA surface using oxygen plasma (plasma group); plasma followed by calcium phosphate (CaP) coating (p-CaP); dopamine followed by CaP coating (d-CaP); or plasma followed by coating with (3-aminopropyl)triethoxysilane (3-APTES). To create a synthetic KPro model, we constructed and attached 500 μm thick collagen type I hydrogel on the modified PMMA surfaces. Surface modifications produced significantly improved interfacial adhesion strength compared to untreated PMMA (p < 0.001). The p-CaP group yielded the best interfacial adhesion with the hydrogel (177 ± 27 mN/cm(2)) followed by d-CaP (168 ± 31 mN/cm(2)), 3-APTES (145 ± 12 mN/cm(2)), and plasma (119 ± 10 mN/cm(2)). Longer-term stability of the adhesion was achieved by d-CaP, which, after 14 and 28 days of incubation in phosphate buffered saline, yielded 164 ± 25 mN/cm(2) (p = 0.906 compared to adhesion at day 1) and 131 ± 20 mN/cm(2) (p = 0.053), respectively. In contrast, significant reduction of adhesion strength was observed in p-CaP group over time (p < 0.001). All surface coatings were biocompatible to human corneal stromal fibroblasts, except for the 3-APTES group, which showed no live cells at 72 h of culture. In contrast, cells on d-CaP surface showed good anchorage, evidenced by the expression of focal adhesion complex (paxillin and vinculin), and prominent filopodia protrusions. In conclusion, d-CaP can not only enhance and provide stability to the adhesion of collagen hydrogel on the PMMA surface but also promote biointegration.
Collapse
Affiliation(s)
- Andri K Riau
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute , Singapore 169856, Singapore
| | - Debasish Mondal
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute , Singapore 169856, Singapore
| | - Gary H F Yam
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute , Singapore 169856, Singapore
| | - Melina Setiawan
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute , Singapore 169856, Singapore
| | - Bo Liedberg
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
- Center for Biomimetic Sensor Science, Nanyang Technological University , Singapore 637553, Singapore
| | - Subbu S Venkatraman
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
| | - Jodhbir S Mehta
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute , Singapore 169856, Singapore
- Singapore National Eye Center , Singapore 168751, Singapore
- Department of Clinical Sciences, Duke-NUS Graduate Medical School , Singapore 169857, Singapore
| |
Collapse
|
24
|
Gunawan AI, Hozumi N, Yoshida S, Saijo Y, Kobayashi K, Yamamoto S. Numerical analysis of ultrasound propagation and reflection intensity for biological acoustic impedance microscope. ULTRASONICS 2015; 61:79-87. [PMID: 25890637 DOI: 10.1016/j.ultras.2015.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 03/30/2015] [Accepted: 03/31/2015] [Indexed: 06/04/2023]
Abstract
This paper proposes a new method for microscopic acoustic imaging that utilizes the cross sectional acoustic impedance of biological soft tissues. In the system, a focused acoustic beam with a wide band frequency of 30-100 MHz is transmitted across a plastic substrate on the rear side of which a soft tissue object is placed. By scanning the focal point along the surface, a 2-D reflection intensity profile is obtained. In the paper, interpretation of the signal intensity into a characteristic acoustic impedance is discussed. Because the acoustic beam is strongly focused, interpretation assuming vertical incidence may lead to significant error. To determine an accurate calibration curve, a numerical sound field analysis was performed. In these calculations, the reflection intensity from a target with an assumed acoustic impedance was compared with that from water, which was used as a reference material. The calibration curve was determined by changing the assumed acoustic impedance of the target material. The calibration curve was verified experimentally using saline solution, of which the acoustic impedance was known, as the target material. Finally, the cerebellar tissue of a rat was observed to create an acoustic impedance micro profile. In the paper, details of the numerical analysis and verification of the observation results will be described.
Collapse
Affiliation(s)
- Agus Indra Gunawan
- Electrical and Electronic Information Engineering Dept., Toyohashi University of Technology, Toyohashi, Japan
| | - Naohiro Hozumi
- Electrical and Electronic Information Engineering Dept., Toyohashi University of Technology, Toyohashi, Japan
| | - Sachiko Yoshida
- Environmental Engineering Dept., Toyohashi University of Technology, Toyohashi, Japan
| | | | | | | |
Collapse
|
25
|
Antibacterial Effects and Biocompatibility of Titania Nanotubes with Octenidine Dihydrochloride/Poly(lactic-co-glycolic acid). BIOMED RESEARCH INTERNATIONAL 2015; 2015:836939. [PMID: 26090449 PMCID: PMC4452295 DOI: 10.1155/2015/836939] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/11/2015] [Accepted: 03/13/2015] [Indexed: 01/20/2023]
Abstract
Titanium (Ti) implants with long-term antibacterial ability and good biocompatibility are highly desirable materials that can be used to prevent implant-associated infections. In this study, titania nanotubes (TNTs) were synthesized on Ti surfaces through electrochemical anodization. Octenidine dihydrochloride (OCT)/poly(lactic-co-glycolic acid) (PLGA) was infiltrated into TNTs using a simple solvent-casting technique. OCT/PLGA-TNTs demonstrated sustained drug release and maintained the characteristic hollow structures of TNTs. TNTs (200 nm in diameter) alone exhibited slight antibacterial effect and good osteogenic activity but also evidently impaired adhesion and proliferation of bone marrow mesenchymal stem cells (BMSCs). OCT/PLGA-TNTs (100 nm in diameter) supported BMSC adhesion and proliferation and showed good osteogenesis-inducing ability. OCT/PLGA-TNTs also exhibited good long-term antibacterial ability within the observation period of 7 d. The synthesized drug carrier with relatively long-term antibacterial ability and enhanced excellent biocompatibility demonstrated significant potential in bone implant applications.
Collapse
|
26
|
Matuska AM, McFetridge PS. The effect of terminal sterilization on structural and biophysical properties of a decellularized collagen-based scaffold; implications for stem cell adhesion. J Biomed Mater Res B Appl Biomater 2014; 103:397-406. [PMID: 24895116 DOI: 10.1002/jbm.b.33213] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 04/16/2014] [Accepted: 05/17/2014] [Indexed: 12/31/2022]
Abstract
Terminal sterilization induces physical and chemical changes in the extracellular matrix (ECM) of ex vivo-derived biomaterials due to their aggressive mechanism of action. Prior studies have focused on how sterilization affects the mechanical integrity of tissue-based biomaterials but have rarely characterized effects on early cellular interaction, which is indicative of the biological response. Using a model fibrocartilage disc scaffold, these investigations compare the effect of three common sterilization methods [peracetic acid (PAA), gamma irradiation (GI), and ethylene oxide (EtO)] on a range of material properties and characterized early cellular interactions. GI and EtO produced unfavorable structural damage that contributed to inferior cell adhesion. Conversely, exposure to PAA resulted in limited structural alterations while inducing chemical modifications that favored cell attachment. Results suggest that the sterilization approach can be selected to modulate biomaterial properties to favor cellular adhesion and has relevance in tissue engineering and regenerative medicine applications. Furthermore, the study of cellular interactions with modified biomaterials in vitro provides information of how materials may react in subsequent clinical applications.
Collapse
Affiliation(s)
- Andrea M Matuska
- J. Crayton Pruitt Family, Department of Biomedical Engineering, University of Florida, Florida
| | | |
Collapse
|
27
|
Antibacterial performance of ZnO-based fillers with mesoscale structured morphology in model medical PVC composites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 41:70-7. [PMID: 24907739 DOI: 10.1016/j.msec.2014.04.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 02/11/2014] [Accepted: 04/17/2014] [Indexed: 01/18/2023]
Abstract
Three different ZnO-based antibacterial fillers having different morphologies in microscale region were prepared by the use of the microwave assisted synthesis protocol created in our laboratory with additional annealing in one case. Further, PVC composites containing 0.5-5 wt.% of ZnO based antibacterial fillers were prepared by melt mixing and characterized by scanning electron microscopy (SEM) and X-ray diffractometry (XRD). Mechanical testing showed no adverse effect on the working of polymer composites due to either of the fillers used or the applied processing conditions in comparison with the neat medical grade PVC. The surface antibacterial activity of the compounded PVC composites was assessed against Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538P according to ISO 22196: 2007 (E). All materials at almost all filler loading levels were efficient against both species of bacteria. The material with the most expanding morphology assuring the largest contact between filler and matrix achieved an excellent level of more than 99.9999% reduction of viable cells of E. coli in comparison to untreated PVC and performed very well against S. aureus, too. A correlation between the morphology and efficacy of the filler was observed and, as a result, a general rule was formulated which links the proneness of the microparticles to perform well against bacteria to their shape and morphology.
Collapse
|