Nanostructured TiO₂ Surfaces Promote Human Bone Marrow Mesenchymal Stem Cells Differentiation to Osteoblasts

Overview

Journal Nanomaterials (Basel)

Date 2017 Mar 25

PMID 28335251

Citations 12

Authors

Marco Vercellino

Gabriele Ceccarelli

Francesco Cristofaro

Martina Balli

Federico Bertoglio

Gianna Bruni

Laura Benedetti

Maria Antonietta Avanzini

Marcello Imbriani

Livia Visai

Affiliations

Soon will be listed here.

Abstract

Micro- and nano-patterning/modification are emerging strategies to improve surfaces properties that may influence critically cells adherence and differentiation. Aim of this work was to study the in vitro biological reactivity of human bone marrow mesenchymal stem cells (hBMSCs) to a nanostructured titanium dioxide (TiO₂) surface in comparison to a coverglass (Glass) in two different culture conditions: with (osteogenic medium (OM)) and without (proliferative medium (PM)) osteogenic factors. To evaluate cell adhesion, hBMSCs phosphorylated focal adhesion kinase (pFAK) foci were analyzed by confocal laser scanning microscopy (CLSM) at 24 h: the TiO₂ surface showed a higher number of pFAK foci with respect to Glass. The hBMSCs differentiation to osteoblasts was evaluated in both PM and OM culture conditions by enzyme-linked immunosorbent assay (ELISA), CLSM and real-time quantitative reverse transcription PCR (qRT-PCR) at 28 days. In comparison with Glass, TiO₂ surface in combination with OM conditions increased the content of extracellular bone proteins, calcium deposition and alkaline phosphatase activity. The qRT-PCR analysis revealed, both in PM and OM, that TiO₂ surface increased at seven and 28 days the expression of osteogenic genes. All together, these results demonstrate the capability of TiO₂ nanostructured surface to promote hBMSCs osteoblast differentiation and its potentiality in biomedical applications.

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