



@article {3295,
	title = {Adsorbed fibrinogen enhances production of bone- and angiogenic-related factors by monocytes/macrophages},
	journal = {Tissue Engineering - Part A},
	volume = {20},
	year = {2014},
	note = {Cited By (since 1996):1Export Date: 21 November 2014},
	month = {2014},
	pages = {250 - 263},
	abstract = {Macrophages are phagocytic cells with great importance in guiding multiple stages of inflammation and tissue repair. By producing a large number of biologically active molecules, they can affect the behavior of other cells and events, such as the foreign body response and angiogenesis. Since protein adsorption to biomaterials is crucial for the inflammatory process, we addressed the ability of the pro-inflammatory molecule fibrinogen (Fg) to modulate macrophage behavior toward tissue repair/regeneration. For this purpose, we used chitosan (Ch) as a substrate for Fg adsorption. Freshly isolated human monocytes were seeded on Ch substrates alone or previously adsorbed with Fg, and allowed to differentiate into macrophages for 10 days. Cell adhesion and morphology, formation of foreign body giant cells (FBGC), and secretion of a total of 80 cytokines and growth factors were evaluated. Both substrates showed similar numbers of adherent macrophages along differentiation as compared with RGD-coated surfaces, which were used as positive controls. Fg did not potentiate FBGC formation. In addition, actin cytoskeleton staining revealed the presence of punctuate F-actin with more elongated and interconnecting cells on Ch substrates. Antibody array screening and quantification of inflammation- and wound-healing-related factors indicated an overall reduction in Ch-based substrates versus RGD-coated surfaces. At late times, most inflammatory agents were down-regulated in the presence of Fg, in contrast to growth factor production, which was stimulated by Fg. Importantly, on Ch+Fg substrates, fully differentiated macrophages produced significant amounts of macrophage inflammatory protein-1delta (MIP-1δ), platelet-derived growth factor-BB, bone morphogenetic protein (BMP)-5, and BMP-7 compared with Ch alone. In addition, other important factors involved in bone homeostasis and wound healing, such as growth hormone, transforming growth factor-β3, and insulin-like growth factor-binding proteins, as well as several angiogenic mediators, including endocrine gland-derived vascular endothelial factor, fibroblast growth factor-7, and placental growth factor, were significantly promoted by Fg. This work provides a new perspective on the inflammatory response in the context of bone repair/regeneration mediated by a pro-inflammatory protein (Fg) adsorbed onto a biomaterial (Ch) that does not otherwise exhibit osteogenic properties. {\textcopyright} Copyright 2014, Mary Ann Liebert, Inc.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84891526984\&partnerID=40\&md5=bf455ae8d2df37fe5c29d41156c8096a},
	author = {Maciel, J. and Oliveira, M.I. and Colton, E. and McNally, A.K. and Oliveira, C. and Anderson, J.M. and Barbosa, M.A.}
}
@article {2759,
	title = {Adsorbed fibrinogen leads to improved bone regeneration and correlates with differences in the systemic immune response},
	journal = {Acta Biomaterialia},
	volume = {9},
	year = {2013},
	note = {Export Date: 23 May 2013Source: ScopusArticle in Press},
	month = {07/2013},
	pages = {7209-7217},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84876834487\&partnerID=40\&md5=2d00f0bc55f461c9c979548276f0e53d},
	author = {Santos, S.G. and Lamghari, M. and Almeida, C.R. and Oliveira, M.I. and Neves, N. and Ribeiro, A.C. and Barbosa, J.N. and Barros, R. and Maciel, J. and Martins, M.C.L. and Gon{\c c}alves, R.M. and Barbosa, M.A.}
}
@article {2187,
	title = {The effect of adsorbed fibronectin and osteopontin on macrophage adhesion and morphology on hydrophilic and hydrophobic model surfaces},
	journal = {Acta BiomaterialiaActa Biomater.},
	volume = {8},
	year = {2012},
	note = {Export Date: 21 November 2012Source: Scopusdoi: 10.1016/j.actbio.2012.06.010Language of Original Document: EnglishCorrespondence Address: Barbosa, M.A.; INEB - Instituto de Engenharia Biom{\'e}dica, Universidade Do Porto, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal; email: mbarbosa@ineb.up.ptChemicals/CAS: fibronectin, 86088-83-7; gold, 7440-57-5; osteopontin, 106441-73-0References: Anderson, J.M., Biological responses to materials (2001) Annu Rev Mater Res, 31, pp. 81-110;Horbett, T.A., Brash, J.L., Proteins at interfaces: Current issues and future prospects (1987) Proteins at Interfaces, pp. 1-33; 
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},
	month = {2012///},
	pages = {3669 - 3677},
	abstract = {Macrophages play a crucial role in the host response to biomaterials. Here we investigated the effect of adsorbed fibronectin (FN) and osteopontin (OPN), two important proteins for tissue repair, on macrophage adhesion and morphology. Since cell-biomaterial interactions are modulated via proteins adsorbed onto biomaterial surfaces, FN and OPN were adsorbed on model self-assembled monolayers (SAMs) of alkanethiols on gold with different functional terminal groups (CH                        3, OH and tetra(ethylene-glycol)). The initial interaction of inflammatory cells with a biomaterial is crucial for the ensuing phases of an inflammatory reaction. For this reason short-term cultures of primary human macrophages were performed. To account for the competitive adsorption of other proteins serum was added to the culture medium and the effect compared with serum-free medium cultures. In the presence of serum hydrophilic surfaces increased macrophage adhesion. In particular, FN induced a higher cell density, while OPN tended to decrease it. In serum-free medium cell adhesion was greater on hydrophobic surfaces, except for OPN-coated SAMs. Importantly, FN no longer enhanced macrophage adhesion, while OPN maintained its inhibitory effect. Cell polarization studies indicated that macrophage morphology variations induced by surface chemistry are overcome by pre-adsorbed OPN. Taken together our results show that in the presence of serum macrophage adhesion is promoted by FN hydrophilic surfaces, but impaired on OPN-coated surfaces. The effects of inhibited macrophage adhesion on macrophage fusion, and its relevance to the initial stages of the inflammatory response to biomaterials are discussed. {\textcopyright} 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
},
	keywords = {alkane, article, biomaterial, Biomaterials, cell adhesion, cell density, cell interaction, cell structure, controlled study, culture medium, cytoskeleton, Fibronectin, functional group, gold, human, human cell, hydrophilicity, hydrophobicity, inflammatory cell, macrophage, Macrophages, nanomaterial, Osteopontin, priority journal, self assembled monolayer, Self-assembled monolayers, Tetra, thiol, tissue repair},
	isbn = {17427061 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84865455542\&partnerID=40\&md5=9d34fb780e9ce53b424143b0f3eefb97},
	author = {Maciel, J. and Oliveira, M.I. and Gonalves, R.M. and Barbosa, M.A.}
}
@article {2255,
	title = {The stability of self-assembled monolayers with time and under biological conditions},
	journal = {Journal of Biomedical Materials Research - Part AJ. Biomed. Mater. Res. Part A},
	volume = {94},
	year = {2010},
	note = {Cited By (since 1996): 7Export Date: 21 November 2012Source: ScopusCODEN: JBMRCdoi: 10.1002/jbm.a.32746PubMed ID: 20336761Language of Original Document: EnglishCorrespondence Address: Barbosa, M. A.; Divis{\~a}o de Biomateriais, INEB - Instituto de Engenharia Biom{\'e}dica, Universidade do Porto, Rua do Campo Alegre 823, Porto 4150-180, Portugal; email: mbarbosa@ineb.up.ptChemicals/CAS: sulfur, 13981-57-2, 7704-34-9; Culture Media; Ethanol, 64-17-5; Sulfhydryl Compounds; Sulfur, 7704-34-9; Water, 7732-18-5References: Mrksich, M., Whitesides, G.M., Using self-assembled monolayers to understand the interactions of man- Made surfaces with proteins and cells (1996) Annual Review of Biophysics and Biomolecular Structure, 25, pp. 55-78;Mrksich, M., Dike, L.E., Tien, J., Ingber, D.E., Whitesides, G.M., Using microcontact printing to pattern the attachment of mammalian cells to self-assembled monolayers of alkanethiolates on transparent films of gold and silver (1997) Exp Cell Res, 235, pp. 305-313; 
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Martins, M.C.L., Fonseca, C., Barbosa, M.A., Ratner, B.D., Albumin adsorption on alkanethiols self-assembled monolayers on gold electrodes studied by chronopotentiometry (2003) Biomaterials, 24, pp. 3697-3706; 
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},
	month = {2010///},
	pages = {833 - 843},
	abstract = {The stability of self-assembled monolayers (SAMs) of different functionalities (CH                        3
},
	keywords = {Animals, article, Binding energy, Biological conditions, Biological studies, Body fluids, Cattle, Cell culture, Culture Media, Ethanol, Female, Fetal bovine serum, In-cell, materials testing, measurement, molecular stability, Nitrogen chamber, nonhuman, Organic polymers, Oxidation, Oxidation-Reduction, Oxidized sulfur, Photodegradation, Photoelectron spectroscopy, Sams, self assembled monolayer, Self assembled monolayers, Self-assembled monolayers, Stability, Storage condition, Sulfhydryl Compounds, Sulfur, Surface Properties, Water, wettability, X ray photoelectron spectroscopy, XPS, XPS spectra},
	isbn = {15493296 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77954806701\&partnerID=40\&md5=9c561e8b43c045cdeb8d80a42148c6ca},
	author = {Maciel, J. and Martins, M.C.L. and Barbosa, M.A.}
}
