Nanopit-induced osteoprogenitor cell differentiation: the effect of nanopit death

Davison, M. J., McMurray, R. J., Smith, C.-A. , Dalby, M. and Meek, R.M. D. (2016) Nanopit-induced osteoprogenitor cell differentiation: the effect of nanopit death. Journal of Tissue Engineering, 7, pp. 1-8. (doi: 10.1177/2041731416652778) (PMID:27298716)

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We aimed to assess osteogenesis in osteoprogenitor cells by nanopits and to assess optimal feature depth. Topographies of depth 80 nm, 220 nm and 333 nm were embossed onto polycaprolactone (PCL) discs. Bone marrow-derived mesenchymal stromal cells were seeded onto PCL discs, suspended in media and incubated. Samples were fixed after three and 28 days. Cells were stained for the adhesion molecule vinculin and the osteogenic transcription factor RUNX2 after three days. Adhesion was lowest on planar controls and it was the shallowest, 80 nm deep pits that supported optimal adhesion formation. 80 nm and 220 nm deep pits induced most RUNX2 accumulation. After 28 days, osteocalcin and osteopontin expression were used as markers of osteoblastic differentiation. 220 nm deep pits produced cells with the highest concentrations of osteopontin and osteocalcin. All topographies induced higher expression levels than controls. We demonstrated stimulation of osteogenesis in a heterogeneous population of mesenchymal stromal cells. All nanopit depths gave promising results with an optimum depth of 220 nm after 28 days. Nanoscale modification of implant surfaces could optimise fracture union or osteointergration.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dalby, Professor Matthew and Smith, Mrs Carol-Anne and Meek, Professor Dominic
Authors: Davison, M. J., McMurray, R. J., Smith, C.-A., Dalby, M., and Meek, R.M. D.
College/School:College of Medical Veterinary and Life Sciences > School of Molecular Biosciences
Journal Name:Journal of Tissue Engineering
Publisher:SAGE Publications
ISSN (Online):2041-7314
Published Online:02 June 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Journal of Tissue Engineering 7:1-8
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
502891Micro- and nano-patterning of titanium surfaces for optimal osseointegration of orthopaedic implantsMatthew DalbyEngineering & Physical Sciences Research Council (EPSRC)EP/G048703/1RI MOLECULAR CELL & SYSTEMS BIOLOGY