



@article {2214,
	title = {Mesenchymal stem cell recruitment by stromal derived factor-1-delivery systems based on chitosan/poly(γ-glutamic acid) polyelectrolyte complexes},
	journal = {European Cells and MaterialsEur. Cells and Mater.},
	volume = {23},
	year = {2012},
	note = {Export Date: 21 November 2012Source: ScopusLanguage of Original Document: EnglishCorrespondence Address: Gon{\c c}alves, R. M.; INEB, R. Campo Alegre, 823, Porto 4150-180, Portugal; email: raquelg@ineb.up.ptChemicals/CAS: chitosan, 9012-76-4; polyglutamic acid, 24991-23-9, 25513-46-6; Biocompatible Materials; CXCL12 protein, human; Chemokine CXCL12; Chitosan, 9012-76-4; Membranes, Artificial; Polyglutamic Acid, 25513-46-6; poly(gamma-glutamic acid)References: Almeida, C.R., Vasconcelos, D.P., Gon{\c c}alves, R., Barbosa, M.A., Enhanced me s enchymal stromal cell recruitment via Natural Killer cells by incorporation of inflammatory signals in biomaterials (2012) J R Soc Interface, 9, pp. 261-271;Amersham, Iodine-125. A guide to radioiodination techniques (1993) Amersham Life Science, , (I.-A.g.t.r. Techniques, Ed). Amersham, Little Chalfort, UK; 
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},
	month = {2012///},
	pages = {249 - 261},
	abstract = {Human mesenchymal stem cells (hMSCs) have an enormous potential for tissue engineering and cell-based therapies. With a potential of differentiation into multiple lineages and immune-suppression, these cells play a key role in tissue remodelling and regeneration. Here a method of hMSC recruitment is described, based on the incorporation of a chemokine in Chitosan (Ch)/ Poly(γ-glutamic acid) (γ-PGA) complexes. Ch is a nontoxic, cationic polysaccharide widely investigated. γ-PGA is a hydrophilic, non-toxic, biodegradable and negatively charged poly-amino acid. Ch and γ-PGA, being oppositely charged, can be combined through electrostatic interactions. These biocompatible structures can be used as carriers for active substances and can be easily modulated in order to control the delivery of drugs, proteins, DNA, etc. Using the layer-by-layer method, Ch and γ-PGA were assembled into polyelectrolyte multilayers films (PEMs) with thickness of 120 nm. The chemokine stromal-derived factor-1 (SDF-1) was incorporated in these complexes and was continuously released during 120 h. The method of SDF-1 incorporation is of crucial importance for polymers assembly into PEMs and for the release kinetics of this chemokine. The Ch/γ-PGA PEMs with SDF-1 were able to recruit hMSCs, increasing the cell migration up to 6 fold to a maximum of 16.2 {\textpm} 4.9 cells/mm                        2. The controlled release of SDF-1 would be of great therapeutic value in the process of hMSC homing to injured tissues. This is the first study suggesting Ch/γ-PGA PEMs as SDF-1 reservoirs to recruit hMSCs, describing an efficient method of chemokine incorporation that allows a sustained released up to 5 days and that can be easily scaled-up.
},
	keywords = {adsorption kinetics, article, artificial membrane, Biocompatible Materials, biomaterial, cell differentiation, cell migration, cell motion, Cell Movement, Cell recruitment, chemistry, Chemokine CXCL12, chitosan, controlled study, CXCL12 protein, human, cytology, drug adsorption, drug delivery system, Drug Delivery Systems, drug derivative, drug effect, ellipsometry, enzyme linked immunosorbent assay, human, human cell, human tissue, Humans, in vitro study, isotope labeling, Layer-by-layer, Membranes, Artificial, Mesenchymal stem cell, Mesenchymal Stem Cells, metabolism, methodology, poly(gamma glutamic acid), poly(gamma-glutamic acid), Poly(γ-glutamic acid), polyglutamic acid, Protein delivery, static electricity, stromal cell derived factor 1, sustained drug release},
	isbn = {14732262 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84864582297\&partnerID=40\&md5=2fe4a066582cc820d2a8f9dd64fde21b},
	author = {Gon{\c c}alves, R.M. and Antunes, J.C. and Barbosa, M.A.}
}
