In vitro osteoinductivity assay of hydroxylapatite scaffolds, obtained with biomorphic transformation processes, assessed using human adipose stem cell cultures

Maria Rosa Iaquinta, Elena Torreggiani, Chiara Mazziotta, Andrea Ruffini, Simone Sprio, Anna Tampieri, Mauro Tognon, Fernanda Martini, Elisa Mazzoni

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this study, the in vitro biocompatibility and osteoinductive ability of a recently developed biomorphic hydroxylapatite ceramic scaffold (B‐HA) derived from transformation of wood structures were analyzed using human adipose stem cells (hASCs). Cell viability and metabolic activity were evaluated in hASCs, parental cells and in recombinant genetically engineered hASC‐eGFP cells expressing the green fluorescence protein. B‐HA osteoinductivity properties, such as differentially expressed genes (DEG) involved in the skeletal development pathway, osteocalcin (OCN) protein expression and mineral matrix deposition in hASCs, were evaluated. In vitro induction of osteoblastic genes, such as Alkaline phosphatase (ALPL), Bone gamma‐carboxyglutamate (gla) protein (BGLAP), SMAD family member 3 (SMAD3), Sp7 transcription factor (SP7) and Transforming growth factor, beta 3 (TGFB3) and Tumor necrosis factor (ligand) superfamily, member 11 (TNFSF11)/Receptor activator of NF‐κB (RANK) ligand (RANKL), involved in osteoclast differentiation, was undertaken in cells grown on B‐HA. Chondrogenic transcription factor SRY (sex determining region Y)‐box 9 (SOX9), tested up-regulated in hASCs grown on the B‐HA scaffold. Gene expression enhancement in the skeletal development pathway was detected in hASCs using B‐HA compared to sintered hydroxylapatite (S‐HA). OCN protein expression and calcium deposition were increased in hASCs grown on B‐HA in comparison with the control. This study demonstrates the biocompatibility of the novel biomorphic B‐HA scaffold and its potential use in osteogenic differentiation for hASCs. Our data highlight the relevance of B‐HA for bone regeneration purposes.

Original languageEnglish (US)
Article number7092
JournalInternational journal of molecular sciences
Volume22
Issue number13
DOIs
StatePublished - Jul 1 2021

Keywords

  • Biomorphic scaffolds
  • Bone regeneration
  • Hydroxylapatite
  • In vitro osteoinductivity
  • Nanostructure

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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