Neuronal adhesion, proliferation and differentiation of embryonic stem cells on hybrid scaffolds made of xanthan and magnetite nanoparticles

Autor(es)

Glaser, Talita ^[1] ; Bueno, Vania B. ^[2] ; Cornejo, Daniel R. ^[3] ; Petri, Denise F. S. ^[2] ; Ulrich, Henning ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, Dept Bioquim, BR-05508000 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508000 Sao Paulo, SP - Brazil

^[3] Univ Sao Paulo, Inst Fis, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Biomedical Materials; v. 10, n. 4 AUG 2015.
• Citações Web of Science: 10

Resumo

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. (AU)

• Processo FAPESP: 10/13034-2 - Produção de suportes biodegradáveis de hidrogel de polissacarídeos para crescimento celular
• Beneficiário: Vânia Aparecida Blasques Bueno Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/50880-4 - Células-tronco: dos papéis de receptores de cininas e purinas às aplicações terapêuticas
• Beneficiário: Alexander Henning Ulrich
• Modalidade de apoio: Auxílio à Pesquisa - Temático