Neuronal adhesion, proliferation and differentiation of embryonic stem cells on hybrid scaffolds made of xanthan and magnetite nanoparticles.
Biomed Mater
; 10(4): 045002, 2015 Jul 08.
Article
em En
| MEDLINE
| ID: mdl-26154495
Hybrid scaffolds made of xanthan and magnetite nanoparticles (XCA/mag) were prepared by dipping xanthan membranes (XCA) into dispersions of magnetic nanoparticles for different periods of time. The resulting hybrid scaffolds presented magnetization values ranging from 0.25 emu g(-1) to 1.80 emu g(-1) at 70 kOe and corresponding iron contents ranging from 0.25% to 2.3%, respectively. They were applied as matrices for in vitro embryoid body adhesion and neuronal differentiation of embryonic stem cells; for comparison, neat XCA and commercial plastic plates were also used. Adhesion rates were more pronounced when cells were seeded on XCA/mag than on neat XCA or plastic dishes; however, proliferation levels were independent from those of the scaffold type. Embryonic stem cells showed similar differentiation rates on XCA/mag scaffolds with magnetization of 0.25 and 0.60 emu g(-1), but did not survive on scaffolds with 1.80 emu g(-1). Differentiation rates, expressed as the number of neurons obtained on the chosen scaffolds, were the largest on neat XCA, which has a high density of negative charge, and were smallest on the commercial plastic dishes. The local magnetic field inherent of magnetite particles present on the surface of XCA/mag facilitates synapse formation, because synaptophysin expression and electrical transmission were increased when compared to the other scaffolds used. We conclude that XCA/mag and XCA hydrogels are scaffolds with distinguishable performance for adhesion and differentiation of ESCs into neurons.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polissacarídeos Bacterianos
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Células-Tronco Embrionárias
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Alicerces Teciduais
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Nanopartículas de Magnetita
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Neurônios
Limite:
Humans
Idioma:
En
Revista:
Biomed Mater
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido