



@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.}
}
@booklet {3260,
	title = {Impact of 3-D printed PLA- and chitosan-based scaffolds on human monocyte/macrophage responses: Unraveling the effect of 3-D structures on inflammation},
	howpublished = {Acta Biomaterialia},
	volume = {10},
	year = {2014},
	note = {Cited By (since 1996):2Export Date: 21 November 2014},
	month = {2014},
	pages = {613 - 622},
	abstract = {Recent studies have pointed towards a decisive role of inflammation in triggering tissue repair and regeneration, while at the same time it is accepted that an exacerbated inflammatory response may lead to rejection of an implant. Within this context, understanding and having the capacity to regulate the inflammatory response elicited by 3-D scaffolds aimed for tissue regeneration is crucial. This work reports on the analysis of the cytokine profile of human monocytes/macrophages in contact with biodegradable 3-D scaffolds with different surface properties, architecture and controlled pore geometry, fabricated by 3-D printing technology. Fabrication processes were optimized to create four different 3-D platforms based on polylactic acid (PLA), PLA/calcium phosphate glass or chitosan. Cytokine secretion and cell morphology of human peripheral blood monocytes allowed to differentiate on the different matrices were analyzed. While all scaffolds supported monocyte/macrophage adhesion and stimulated cytokine production, striking differences between PLA-based and chitosan scaffolds were found, with chitosan eliciting increased secretion of tumor necrosis factor (TNF)-α, while PLA-based scaffolds induced higher production of interleukin (IL)-6, IL-12/23 and IL-10. Even though the material itself induced the biggest differences, the scaffold geometry also impacted on TNF-α and IL-12/23 production, with chitosan scaffolds having larger pores and wider angles leading to a higher secretion of these pro-inflammatory cytokines. These findings strengthen the appropriateness of these 3-D platforms to study modulation of macrophage responses by specific parameters (chemistry, topography, scaffold architecture). {\textcopyright} 2013 Acta Materialia Inc.},
	keywords = {3-D scaffolds, Human macrophages, Inflammation, Rapid prototyping, Tissue engineering},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84896505907\&partnerID=40\&md5=948f87b684be751bc6eb444e28ce6025},
	author = {Almeida, C.R. and Serra, T. and Oliveira, M.I. and Planell, J.A. and Barbosa, M.A. and Navarro, M.}
}
@article {3270,
	title = {Macrophages stimulate gastric and colorectal cancer invasion through EGFR Y 1086, c-Src, Erk1/2 and Akt phosphorylation and smallGTPase activity},
	journal = {Oncogene},
	volume = {33},
	year = {2014},
	note = {Cited By (since 1996):2Export Date: 21 November 2014},
	month = {2014},
	pages = {2123 - 2133},
	abstract = {The interactions between cancer cells and their microenvironment are crucial for malignant progression, as they modulate invasion-related activities. Tumor-associated macrophages are generally considered allies in the process of tumor progression in several types of cancer, although their role on gastric and colorectal carcinomas is still poorly understood. In this report, we studied the influence of primary human macrophages on gastric and colorectal cancer cells, considering invasion, motility/migration, proteolysis and activated intracellular signaling pathways. We demonstrated that macrophages stimulate cancer cell invasion, motility and migration, and that these effects depend on matrix metalloproteinase (MMP) activity and on the activation of epidermal growth factor receptor (EGFR) (at the residue Y 1086), PLC-γ (phospholipase C-gamma) and Gab1 (GRB2-associated binding protein-1), as evidenced by siRNA (small interference RNA) experiments. Epidermal growth factor (EGF)-immunodepletion impaired macrophage-mediated cancer cell invasion and motility, suggesting that EGF is the pro-invasive and pro-motile factor produced by macrophages. Macrophages also induced gastric and colorectal cancer cell phosphorylation of Akt, c-Src and ERK1/2, and led to an increase of RhoA and Cdc42 activity. Interestingly, whereas macrophage-mediated cancer cell c-Src and ERK1/2 phosphorylation occurred downstream EGFR activation, Akt phosphorylation seems to be a parallel event, taking place in an EGFR-independent manner. The involvement of EGF, EGFR-downstream signaling partners and MMPs in macrophage-mediated invasion provides novel insights into the molecular crosstalk established between cancer cells and macrophages, opening new perspectives for the design of new and more efficient therapeutic strategies to counteract cancer cell invasion. {\textcopyright} 2014 Macmillan Publishers Limited.},
	keywords = {cancer cell invasion, colon cancer, Gastric cancer, invasion-related signaling pathways, Macrophages, tumor microenvironment},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84899425243\&partnerID=40\&md5=beff5192ff42940c75fef8b48ebd3ae7},
	author = {Cardoso, A.P. and Pinto, M.L. and Pinto, A.T. and Oliveira, M.I. and Pinto, M.T. and Gon{\c c}alves, R. and Relvas, J.B. and Figueiredo, C. and Seruca, R. and Mantovani, A. and Mareel, M. and Barbosa, M.A. and Oliveira, M.J.}
}
@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 {2776,
	title = {Fibrinogen promotes resorption of chitosan by human osteoclasts},
	journal = {Acta Biomaterialia},
	volume = {9},
	year = {2013},
	note = {Export Date: 23 May 2013Source: ScopusArticle in Press},
	month = {2013///},
	pages = {6553-6562},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84873739793\&partnerID=40\&md5=5114933c69d12bf99e9785aca23b3011},
	author = {Torres, A.L. and Santos, S.G. and Oliveira, M.I. and Barbosa, M.A.}
}
@booklet {2867,
	title = {Macrophages stimulate gastric and colorectal cancer invasion through EGFR Y1086, c-Src, Erk1/2 and Akt phosphorylation and smallGTPase activity},
	howpublished = {Oncogene},
	year = {2013},
	note = {Cited By (since 1996):1Export Date: 12 December 2013Source: ScopusArticle in Press},
	month = {2013///},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84876908646\&partnerID=40\&md5=bcc2929bb93817db3dc0e3421c420722},
	author = {Cardoso, A.P. and Pinto, M.L. and Pinto, A.T. and Oliveira, M.I. and Pinto, M.T. and Gon{\c c}alves, R. and Relvas, J.B. and Figueiredo, C. and Seruca, R. and Mantovani, A. and Mareel, M. and Barbosa, M.A. and Oliveira, M.J.}
}
@article {2180,
	title = {Chitosan drives anti-inflammatory macrophage polarisation and pro-inflammatory dendritic cell stimulation.},
	journal = {European cells \& materialsEur Cell Mater},
	volume = {24},
	year = {2012},
	note = {Export Date: 21 November 2012Source: ScopusPubMed ID: 22828991Language of Original Document: EnglishCorrespondence Address: Oliveira, M.I.Chemicals/CAS: chitosan, 9012-76-4; Antigens, CD86; Biocompatible Materials; Chitosan, 9012-76-4; Histocompatibility Antigens Class II; IL10 protein, human; Interleukin-10, 130068-27-8; Transforming Growth Factor beta1; Tumor Necrosis Factor-alpha},
	month = {2012///},
	pages = {136 - 152; discussion 152-153},
	abstract = {Macrophages and dendritic cells (DC) share the same precursor and play key roles in immunity. Modulation of their behaviour to achieve an optimal host response towards an implanted device is still a challenge. Here we compare the differentiation process and polarisation of these related cell populations and show that they exhibit different responses to chitosan (Ch), with human monocyte-derived macrophages polarising towards an anti-inflammatory phenotype while their DC counterparts display pro-inflammatory features. Macrophages and DC, whose interactions with biomaterials are frequently analysed using fully differentiated cells, were cultured directly on Ch films, rather than exposed to the polymer after complete differentiation. Ch was the sole stimulating factor and activated both macrophages and DC, without leading to significant T cell proliferation. After 10 d on Ch, macrophages significantly down-regulated expression of pro-inflammatory markers, CD86 and MHCII. Production of pro-inflammatory cytokines, particularly TNF-α, decreased with time for cells cultured on Ch, while anti-inflammatory IL-10 and TGF-β1, significantly increased. Altogether, these results suggest an M2c polarisation. Also, macrophage matrix metalloproteinase activity was augmented and cell motility was stimulated by Ch. Conversely, DC significantly enhanced CD86 expression, reduced IL-10 secretion and increased TNF-α and IL-1β levels. Our findings indicate that cells with a common precursor may display different responses, when challenged by the same biomaterial. Moreover, they help to further comprehend macrophage/DC interactions with Ch and the balance between pro- and anti-inflammatory signals associated with implant biomaterials. We propose that an overall pro-inflammatory reaction may hide the expression of anti-inflammatory cytokines, likely relevant for tissue repair/regeneration.},
	keywords = {antibody specificity, Antigens, CD86, article, Biocompatible Materials, biomaterial, biosynthesis, CD86 antigen, Cell culture, cell differentiation, cell motion, Cell Movement, Cells, Cultured, chitosan, cytology, dendritic cell, Dendritic Cells, drug effect, flow cytometry, Histocompatibility Antigens Class II, HLA antigen class 2, human, Humans, IL10 protein, human, immunology, interleukin 10, Interleukin-10, macrophage, Macrophages, metabolism, monocyte, Monocytes, Organ Specificity, transforming growth factor beta1, tumor necrosis factor alpha, Tumor Necrosis Factor-alpha},
	isbn = {14732262 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84868253478\&partnerID=40\&md5=5a496411709ccbe5d3d70de13b58b08a},
	author = {Oliveira, M.I. and Santos, S.G. and Oliveira, M.J. and Torres, A.L. 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; 
Dee, K.C., Puleo, D.A., Bizios, R., Protein-surface interactions (2003) An Introduction to Tissue-biomaterial Interactions, pp. 37-37. , New York: John Wiley \& Sons Inc; 
Wilson, C.J., Clegg, R.E., Leavesley, D.I., Pearcy, M.J., Mediation of biomaterial-cell interactions by adsorbed proteins: A review (2005) Tissue Eng, 11, pp. 1-18; 
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Malmstrom, J., Christensen, B., Lovmand, J., Sorensen, E.S., Duch, M., Sutherland, D.S., Osteopontin presentation affects cell adhesion - Influence of underlying surface chemistry and nanopatterning of osteopontin (2010) J Biomed Mater Res, 95, pp. 518-530
},
	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.}
}
