Cell behaviour on phospholipids-coated surfaces |
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Authors: | M Bosetti M Santin A W Lloyd S P Denyer M Sabbatini M Cannas |
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Affiliation: | (1) Department of Clinical and Experimental Medicine, Human Anatomy, University of Eastern Piedmont “A. Avogadro”, Via Solaroli 17, 28100 Novara, Italy;(2) Biomedical Materials Research Group, School of Pharmacy & Biomolecular Sciences, University of Brighton, Moulsecoomb, Brighton, BN2 4GJ, UK |
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Abstract: | Effective integration of orthopedic biomaterials requires the rapid formation of the inorganic mineral phase during the first
hours of implantation and the subsequent adhesion and proliferation of the osteoblasts. It has recently been demonstrated
that phosphatidylserine-rich phospholipid coatings can induce a fast mineralisation of titanium implant surfaces on incubation
in simulated body fluids. The aim of this work was to investigate the biocompatibility of these coatings in terms of cytotoxicity
and ability to support osteoblast adhesion and activity. Cytotoxicity and cell adhesion to uncoated titanium, calcified phospholipid-coated
titanium and HA-coated titanium was assessed using fibroblasts and osteoblast-like cells. The synthesis of type I collagen
by osteoblast-like cells cultured on the calcified-phospholipid coatings was also comparable to that observed for osteoblast-like
cells cultured on the titanium and HA-Ti surfaces.
The results suggest that the fast mineralization of the phospholipid matrix, obtained in vitro by its pre-treatment in a SBF, exposes the cells to an environment similar to that present in the bone during its natural
formation that allow cells to adhere, proliferate and produce proteins fundamental for bone growth. The biocompatibility of
these phospholipid-based coatings, in combination with their ability to initiate rapid mineralisation, provides a promising
material that could in vivo create bone cell interactions and bone integration. |
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