Materials-driven fibronectin assembly on nanoscale topography enhances mesenchymal stem cell adhesion, protecting cells from bacterial virulence factors and preventing biofilm formation

Laila A Damiati, Monica P Tsimbouri, Virginia-Llopis Hernandez, Vineetha Jayawarna, Mark Ginty, Peter Childs, Yinbo Xiao, Karl Burgess, Julia Wells, Mark R Sprott, R M Dominic Meek, Peifeng Li, Richard O C Oreffo, Angela Nobbs, Gordon Ramage, Bo Su, Manuel Salmeron-Sanchez, Matthew J Dalby

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
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Abstract

Post-operative infection is a major complication in patients recovering from orthopaedic surgery. As such, there is a clinical need to develop biomaterials for use in regenerative surgery that can promote mesenchymal stem cell (MSC) osteospecific differentiation and that can prevent infection caused by biofilm-forming pathogens. Nanotopographical approaches to pathogen control are being identified, including in orthopaedic materials such as titanium and its alloys. These topographies use high aspect ratio nanospikes or nanowires to prevent bacterial adhesion but these features also significantly reduce MSC adhesion and activity. Here, we use a poly (ethyl acrylate) (PEA) polymer coating on titanium nanowires to spontaneously organise fibronectin (FN) and to deliver bone morphogenetic protein 2 (BMP2) to enhance MSC adhesion and osteospecific signalling. Using a novel MSC–Pseudomonas aeruginosa co-culture, we show that the coated nanotopographies protect MSCs from cytotoxic quorum sensing and signalling molecules, enhance MSC adhesion and osteoblast differentiation and reduce biofilm formation. We conclude that the PEA polymer-coated nanotopography can both support MSCs and prevent pathogens from adhering to a biomaterial surface, thus protecting from biofilm formation and bacterial infection, and supporting osteogenic repair.

Original languageEnglish
Article number121263
JournalBiomaterials
Volume280
Early online date17 Nov 2021
DOIs
Publication statusPublished - 31 Jan 2022

Keywords

  • mesenchymal stem cells
  • nanotopography
  • nanoscale coatings
  • multifunctional materials
  • anti-bacterial

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