Phosphate glass fibres and their role in neuronal polarization and axonal growth direction

Phosphate glass fibres with composition 50P2O5–30CaO–9Na2O–3SiO2–3MgO–(5−x)K2O–xTiO2mol.% (x=0, 2.5, 5, respectively coded as TiPS0, TiPS2.5 and TiPS5) were drawn following the preform drawing approach. A 20-day solubility test in bi-distilled water was carried out on glass fibres with different com...

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Bibliographic Details
Published in:Acta biomaterialia 2012-03, Vol.8 (3), p.1125-1136
Main Authors: Vitale-Brovarone, C., Novajra, G., Lousteau, J., Milanese, D., Raimondo, S., Fornaro, M.
Format: Article
Language:English
Subjects:
Animals
Axons
Cell Adhesion
Cell Line, Transformed
Cell Proliferation
ganglia
Ganglia, Spinal - cytology
Ganglia, Spinal - metabolism
Glass
Glial cell
heat treatment
In vitro test
Nerve Regeneration
nerve tissue
Neurites
Neuron
olfactory bulb
Olfactory Bulb - cytology
Olfactory Bulb - metabolism
Phosphate glass fibres
Phosphates
Rats
solubility
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Summary:Phosphate glass fibres with composition 50P2O5–30CaO–9Na2O–3SiO2–3MgO–(5−x)K2O–xTiO2mol.% (x=0, 2.5, 5, respectively coded as TiPS0, TiPS2.5 and TiPS5) were drawn following the preform drawing approach. A 20-day solubility test in bi-distilled water was carried out on glass fibres with different compositions and diameters ranging between 25 and 82μm. The results show that the glass composition, the initial fibre diameter and the thermal treatment are the main factors influencing the dissolution kinetics and that the fibres maintain their structural integrity and composition during dissolution. Biological tests were carried out on aligned TiPS2.5 glass fibres using Neonatal Olfactory Bulb Ensheathing Cell Line (NOBEC) and Dorsal Root Ganglia (DRG) neurons. The fibres showed to be permissive substrates for cell adhesion and proliferation. The aligned configuration of the fibres seemed to provide a directional cue for growing axons of DRG neurons, which showed to sprout and grow long neurites along the fibre axis direction. These promising findings encourages further studies to evaluate the potential use of resorbable glass fibres (e.g.in combination with a nerve guidance tube) for the enhancement of the peripheral nerve healing with the role of supporting and guiding the cells involved in the nerve regeneration.
ISSN:1742-7061
1878-7568
DOI:10.1016/j.actbio.2011.11.018