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Montastier E, Bolton J, Valsesia A, Hager J, Langin D, Viguerie N. Profil d’expression des microARNs du tissu adipeux de patients obèses associés à la restriction calorique. NUTR CLIN METAB 2018. [DOI: 10.1016/j.nupar.2018.09.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
Polymer substrates with tailored surface properties are increasingly desired in tissue engineering studies. In this work a procedure was developed to improve the use of a polycaprolactone (PCL) films for these applications. Ion beam treatments of PCL films activated the surface by different modification mechanisms. The PCL activation conditions were studied using several techniques to evaluate the modifications of the films surface. The results obtained from FTIR, X-ray photoelectron spectroscopy and atomic force microscopy indicated that a gradual modification of the composition and microstructure of the films was induced by the process. The modified surfaces induced shifts in Zeta potential vs pH curves and increased the polar component of the surface free energy. The protein adsorption characteristics of the PCL films were monitored by microgravimetric techniques confirming that the ion beam treatment was able to trigger bovine serum albumin adsorption onto the treated PCL surface.
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Affiliation(s)
- M. Manso
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy, ,
| | - A. Valsesia
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy
| | - G. Ceccone
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy
| | - F. Rossi
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy,
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Manso M, Rossini P, Malerba I, Valsesia A, Gribaldo L, Ceccone G, Rossi F. Combination of ion beam stabilisation, plasma etching and plasma deposition for the development of tissue engineering micropatterned supports. Journal of Biomaterials Science, Polymer Edition 2012; 15:161-72. [PMID: 15109095 DOI: 10.1163/156856204322793557] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The performance of biomedical assays at both molecular and cellular level depends greatly on the ability to design new polymer surfaces. Patterns can be created by using materials with contrasted surface properties. In this work we describe in detail the preparation of micropatterned surfaces to be used as tissue engineering supports. Poly(ethylene glycol) (PEG) was used as the 'anti-fouling' polymer in opposition to functional regions covered by acrylic acid (AAc). Since spin-casted PEG films are unstable, ion beam stabilization (IBS) treatment was applied in order to render it insoluble. On the other hand, AAc films were deposited by low-power plasma chemical vapour deposition. Chemical properties of both polymers were monitored by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy while topographic features were followed by atomic force microscopy. Finally, a micropattern was produced by using a mask, which isolated the IBS-PEG from the AAc-deposited regions. Endothelial cells cultured on the surface were observed to follow the micropatterns. In fact, for a certain surface density it was observed that the cells present tensile or compressive stresses when forced to remain in the anti-fouling or the functionalised regions, respectively.
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Affiliation(s)
- M Manso
- European Commission, Joint Research Centre, Institutefor Health and Consumer Protection (IHCP-JRC TP-203), Via Enrico Fermi, 21020 Ispra (Va), Italy.
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Ceccone G, Leung BO, Perez-Roldan MJ, Valsesia A, Colpo P, Rossi F, Hitchcock AP, Scholl A. X-ray spectromicroscopy study of ubiquitin adsorption to plasma polymerized microstructures. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Strola S, Ceccone G, Gilliand D, Valsesia A, Lisboa P, Rossi F. Comparison of surface activation processes for protein immobilization on plasma-polymerized acrylic acid films. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3297] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Walters RG, Jacquemont S, Valsesia A, de Smith AJ, Martinet D, Andersson J, Falchi M, Chen F, Andrieux J, Lobbens S, Delobel B, Stutzmann F, El-Sayed Moustafa JS, Chèvre JC, Lecoeur C, Vatin V, Bouquillon S, Buxton JL, Boute O, Holder-Espinasse M, Cuisset JM, Lemaitre MP, Ambresin AE, Brioschi A, Gaillard M, Giusti V, Fellmann F, Ferrarini A, Hadjikhani N, Campion D, Guilmatre A, Goldenberg A, Calmels N, Mandel JL, Le Caignec C, David A, Isidor B, Cordier MP, Dupuis-Girod S, Labalme A, Sanlaville D, Béri-Dexheimer M, Jonveaux P, Leheup B, Ounap K, Bochukova EG, Henning E, Keogh J, Ellis RJ, Macdermot KD, van Haelst MM, Vincent-Delorme C, Plessis G, Touraine R, Philippe A, Malan V, Mathieu-Dramard M, Chiesa J, Blaumeiser B, Kooy RF, Caiazzo R, Pigeyre M, Balkau B, Sladek R, Bergmann S, Mooser V, Waterworth D, Reymond A, Vollenweider P, Waeber G, Kurg A, Palta P, Esko T, Metspalu A, Nelis M, Elliott P, Hartikainen AL, McCarthy MI, Peltonen L, Carlsson L, Jacobson P, Sjöström L, Huang N, Hurles ME, O'Rahilly S, Farooqi IS, Männik K, Jarvelin MR, Pattou F, Meyre D, Walley AJ, Coin LJM, Blakemore AIF, Froguel P, Beckmann JS. A new highly penetrant form of obesity due to deletions on chromosome 16p11.2. Nature 2010; 463:671-5. [PMID: 20130649 PMCID: PMC2880448 DOI: 10.1038/nature08727] [Citation(s) in RCA: 345] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 12/01/2009] [Indexed: 01/04/2023]
Affiliation(s)
- R G Walters
- Section of Genomic Medicine, Imperial College London, London W12 0NN, UK
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Affiliation(s)
- A. Valsesia
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (VA), Italy
| | - I. Mannelli
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (VA), Italy
| | - P. Colpo
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (VA), Italy
| | - F. Bretagnol
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (VA), Italy
| | - F. Rossi
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (VA), Italy
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Heinz P, Brétagnol F, Mannelli I, Sirghi L, Valsesia A, Ceccone G, Gilliland D, Landfester K, Rauscher H, Rossi F. Poly(N-isopropylacrylamide) grafted on plasma-activated poly(ethylene oxide): thermal response and interaction with proteins. Langmuir 2008; 24:6166-6175. [PMID: 18484752 DOI: 10.1021/la800575f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Thermoresponsive polymer layers offer the possibility of preparing smart surfaces with properties that are switchable through a phase transition, usually close to the lower critical solution temperature of the polymer. In particular, poly( N-isopropylacrylamide) (pNIPAM) has gained a great deal of attention because it has such a phase transition in a physiologically interesting temperature range. We have prepared ultrathin thermoresponsive coatings by grafting pNIPAM on a plasma-CVD-deposited, poly(ethylene oxide)-like polymer substrate that was activated in an Ar plasma discharge to initiate the grafting. The presence and integrity of pNIPAM was verified by XPS and ToF-SIMS, and a dramatic change in the wettability during the phase transition was identified by temperature-dependent contact angle measurements. The transition from the hydrated to the collapsed conformation was analyzed by temperature-dependent QCM measurements and by AFM. An unusual, reversible behavior of the viscoelastic properties was seen directly at the phase transition from the swollen to the collapsed state. The phase transition leads to a switching from protein repulsion to a state that allows the adsorption of proteins.
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Affiliation(s)
- P Heinz
- Institute for Health and Consumer Protection, Directorate General Joint Research Centre, European Commission, Via E. Fermi, 21027 Ispra (VA), Italy
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Valsesia A, Colpo P, Mannelli I, Mornet S, Bretagnol F, Ceccone G, Rossi F. Use of Nanopatterned Surfaces To Enhance Immunoreaction Efficiency. Anal Chem 2008; 80:1418-24. [DOI: 10.1021/ac701762k] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Valsesia
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
| | - P. Colpo
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
| | - I. Mannelli
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
| | - S. Mornet
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
| | - F. Bretagnol
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
| | - G. Ceccone
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
| | - F. Rossi
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, 21020 Ispra (Varese), Italy
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Ruiz A, Valsesia A, Ceccone G, Gilliland D, Colpo P, Rossi F. Fabrication and characterization of plasma processed surfaces with tuned wettability. Langmuir 2007; 23:12984-12989. [PMID: 18020471 DOI: 10.1021/la702424r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Engineered surfaces with controlled hydrophilic/ hydrophobic character have been fabricated by tailoring the substrate topography and chemistry. In this method, the substrate to be treated was first coated by a photoresist, which was then surface-roughened using SF6 plasma etching. The resulting rough texture was then transferred to the underlying silicon surface by over-etching of the photoresist. At this point, the topographically modified surface was modified chemically by controlled deposition of a thin polymer layer using plasma processing. In this way, both the surface texture and the surface chemistry could be varied independently, producing surfaces with variable wetting character, including super-hydrophilicity and super-hydrophobicity, depending on the choice of plasma polymer deposited. Chemical characterization demonstrates a correlation between the surface chemistry and the wettability of the samples after etching. The surface elementary composition contained more C-F groups as the measured contact angle increased, indicating that the change of wettability is due to both the roughness and the surface energy of the deposited photoresist. In the case of materials deposited on the plasma-treated rough surfaces, the strengthening of the wetting character is only due to the created surface roughness, as XPS analyses showed no significant chemical difference as compared to the flat polymer.
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Affiliation(s)
- A Ruiz
- Institute for Health and Consumer Protection, Joint Research Centre-European Commission, TP 203, 21020 Ispra (VA) Italy
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Belegrinou S, Mannelli I, Sirghi L, Bretagnol F, Valsesia A, Rauscher H, Rossi F. Formation of viscoelastic protein droplets on a chemically functionalized surface. J Phys Chem B 2007; 111:8713-6. [PMID: 17602524 DOI: 10.1021/jp073297x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Droplet formation during adsorption of the protein lactoferrin from an aqueous solution on a surface functionalized by plasma deposited poly(acrylic acid) is studied using quartz crystal microbalance and atomic force microscopy. The formation of protein droplets is particularly favored at pH values close to the isoelectric point of lactoferrin, where the molecules carry little excess charge and intermolecular attraction exceeds the molecule-surface interaction. By combining topographic data with information on the system dynamics, it is possible to describe the viscoelastic properties of the adsorbate within a quantitative model for nonhomogeneous layers.
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Manso Silván M, Valsesia A, Hasiwa M, Gilliland D, Ceccone G, Rossi F. Surface Characterization of Biopolymer Micropatterns Processed by Ion-Beam Modification and PECVD. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/cvde.200606580] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Manso-Silván M, Valsesia A, Hasiwa M, Rodríguez-Navas C, Gilliland D, Ceccone G, García Ruiz JP, Rossi F. Micro-spot, UV and wetting patterning pathways for applications of biofunctional aminosilane-titanate coatings. Biomed Microdevices 2006; 9:287-94. [PMID: 17195109 DOI: 10.1007/s10544-006-9027-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The micropatterning of functional films for biomedical applications is a key part of the process leading to a precise application. In the present work we present three different methodologies to micro-design biofunctional aminosilane-titanate coatings. The chemical functionality of the surface immobilized amino groups was initially tested by surface characterization techniques. X-ray photoelectron spectroscopy was used to analyze the films before and after derivatization with Trifluoromethylbenzaldehyde while atomic force microscopy was used to study the adsorption kinetics onto these hybrid films. The three micropatterning pathways were selected for three different kinds of applications: (1) 300 microm spots were satisfactorily used for oligonucleotide immobilization, (2) Masked regions protected from UV irradiation were intensively coated by colloidal gold nanoparticles creating a drastic contrast with respect to the UV exposed areas, and (3) radial micro stripes, used afterwards for culturing cells, were created onto Si substrates by wetting from modified precursor solutions. The results are a clear indication of the versatility of hybrid aminosilane-titanate coatings for biomedical applications requiring micropatterned biofunctional surfaces.
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Affiliation(s)
- M Manso-Silván
- Departamento de Física Aplicada C-XII y Departamento de Biología Molecular C-X, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
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Manso M, Valsesia A, Lejeune M, Gilliland D, Ceccone G, Rossi F. Tailoring surface properties of biomedical polymers by implantation of Ar and He ions. Acta Biomater 2005; 1:431-40. [PMID: 16701824 DOI: 10.1016/j.actbio.2005.03.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Revised: 02/21/2005] [Accepted: 03/21/2005] [Indexed: 10/25/2022]
Abstract
Ion implantation at 25 and 100 keV has been used as a tool for the modification of the surface properties of two biomedical polymers. The modulation induced by the different energy dispersion mechanisms of Ar and He have allowed satisfactory modifications for both the activation of the surfaces of chemically functional polycaprolactone (PCL) and the stabilization of anti-fouling poly(ethylene glycol) (PEG). In both cases the implantations have been performed at doses of 10(14) cm(-2) by taking into account the effect of different current densities, which are shown to distinctly influence the fragmentation-crosslinking of the target polymers. The resultant films were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, time of flight secondary ion mass spectroscopy and atomic force microscopy. Both shifts in zeta potential versus pH curves and the alteration of the polar components of the surface free energy (contact angle measurements) were correlated with the composition analysis. The response of the modified surfaces towards biomolecular interaction is demonstrated by the induction of preferential adsorption on irradiated PCL and the inhibited adsorption onto implanted PEG regions for selected oligopeptides and proteins.
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Affiliation(s)
- M Manso
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, Ispra (Va), Italy.
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Manso-Silván M, Valsesia A, Gilliland D, Ceccone G, Rossi F. Ion-beam treatment of PEO; towards a physically stabilized anti-fouling film. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.1750] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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