Multi and single walled carbon nanotubes: effects on cell responses and biomineralization of osteoblasts cultures

Autor(es)

Zancanela, Daniela C. ^[1] ; de Faria, Amanda N. ^{[2, 1]} ; Simao, Ana Maria S. ^[1] ; Goncalves, Rogeria R. ^[1] ; Ramos, Ana Paula ^[1] ; Ciancaglini, Pietro ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, FFCLRP, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, FMRP, Dept Bioquim & Imunol, BR-14040901 Ribeirao Preto, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE; v. 27, n. 3 MAR 2016.
• Citações Web of Science: 10

Resumo

The use of carbon nanotubes (CNTs) on the development of biomaterials has been motivated by their excellent mechanical properties that could improve synthetic bone materials. However, the toxicity of CNTs on the tissue/implant interface and their influence on the biomineralization process have some contradictions. We investigated the influence of CNTs on osteoblasts plated on titanium (Ti) discs or plastic surfaces. We evaluated osteoblasts viability, alkaline phosphatase (ALP) activity, and mineralized matrix formation in the different phases of osteoblasts growth in the presence of single-walled CNTs (SWCNTs) and multi-walled CNTs (MWCNTs). An increase in osteoblasts viability was observed at the 21st day for both CNTs on plastic surface, while viability increased for MWCNTs at the 7th and 14th days and at the 7th day for SWCNTs on Ti discs compared to control. ALP activity increased at the 14th and 21st days for MWCNTs on plastic surfaces. For cells incubated with SWCNTs, an increase in ALP activity at the 7th day for plastic surface and at the 14th day for both materials (plastic and Ti) was observed. The mineralized matrix formation increased at the 21st day on plastic surface with SWCNTs, and at the 14th and 21st days for both CNTs on Ti discs. In conclusion, both SWCNTs and MWCNTs are not toxic to osteoblasts at concentrations up to 5 x 10(-5) and 1.3 x 10(-2) mg/mL, respectively, either in Ti discs or plastic surfaces. In the long term, the cells grown in contact with both CNTs and Ti presented better results regarding bone-like nodules formation. (AU)

• Processo FAPESP: 11/22232-5 - Compósitos baseados em nanoestruturas de carbono: uma aplicação nanobiotecnológica na osteogênese
• Beneficiário: Pietro Ciancaglini
• Modalidade de apoio: Auxílio à Pesquisa - Regular