Superparamagnetic hybrid microspheres affecting osteoblasts behaviour

Tatiana M. Fernandes Patrício, Silvia Panseri, Monica Montesi, Michele Iafisco, Monica Sandri, Anna Tampieri, Simone Sprio

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The present work describes biomimetic hybrid microspheres made of collagen type I-like peptide matrix (RCP) mineralised with Fe 2+ /Fe 3+ doping hydroxyapatite (RCPFeHA) by a bio-inspired process. Superparamagnetic RCPFeHA microspheres are obtained by emulsification of the hybrid slurries in the presence of citrate ions, to achieve a biomimetic surface functionalisation improving the bioactivity and the dispersion ability in cell culture medium. A biological in vitro study correlates the osteoblast cells behaviour to calcium and iron ions released by the hybrid microspheres in culture media mimicking physiological or inflammatory environment, evidencing a clear triggering of cell activity and bio-resorption ability. In presence of the microspheres, the osteoblast cells maintain their typical morphology and no cell damage were detected, whereas also showing up-regulation of osteogenic markers. The ability of the hybrid microspheres to undergo bio-resorption and release bioactive ions in response to different environmental stimuli without harmful effects opens new perspectives in bone regeneration, as magnetically active bone substitute with potential ability of drug carrier and smart response in the presence of inflammatory states.

Original languageEnglish (US)
Pages (from-to)234-247
Number of pages14
JournalMaterials Science and Engineering C
StatePublished - Mar 2019


  • Bio-inspired mineralisation
  • Bone tissue engineering
  • Cell behaviour
  • Hybrid microspheres
  • Ions release
  • Iron-substituted apatite

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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