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β-Tricalcium phosphate 3D scaffold promote alone osteogenic differentiation of human adipose stem cells: in vitro study

  • Gerardo Marino
  • Francesco Rosso
  • Gennaro Cafiero
  • Carla Tortora
  • Marco Moraci
  • Manlio Barbarisi
  • Alfonso Barbarisi
Article

Abstract

Human adipose tissues surgically resected from the subcutaneous abdominal region were enzymatically processed to obtain Human Adipose Stem cells (fibroblast-like adipose tissue-derived stromal cells—ADSC-FL) that were immunophenotypically characterized using a panel of mesenchymal markers by flow cytometry. The formation of new hydroxyapatite crystals in culture dishes, by differentiating cells, further demonstrate the osteogenic potential of purified cells. The aim of this study was to evaluate the osteogenic differentiation potential of ADSC-FL seeded onto a porous β-tricalcium phosphate (β-TCP) matrix. ADSC-FL was cultured on the β-TCP matrix in medium with or without osteogenic differentiation additives. Time-dependent cell differentiation was monitored using osteogenic markers such as alkaline phosphatase (activity assay), osteocalcin and ostopontin (ELISA method) expression. Our results reveal that β-TCP triggers the differentiation of ADSC-FL toward an osteoblastic phenotype irrespective of whether the cells are grown in a proliferative or a differentiative medium. Hence, a β-TCP matrix is sufficient to promote osteoblastic differentiation of ADSC-FL. However, in proliferative medium, alkaline phosphatase activity was detected at lower level respect to differentiative medium and osteocalcin and osteopontin showed an expression delay in cells cultured in proliferative medium respect to differentiative one. Moreover, we observed an increase in FAK phosphorylation at level of tyrosine residue in position 397 (Western-blot) that indicates a good cell adhesion to β-TCP scaffold. In conclusion, our paper demonstrates that a three-dimensional β-TCP scaffold in vitro triggers on its own the differentiation of ADSC-FL toward an osteoblastic phenotype without the need to use differentiative media.

Keywords

Focal Adhesion Kinase Osteogenic Differentiation Environmental Scanning Electron Microscopy Proliferative Medium Focal Adhesion Kinase Phosphorylation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Gerardo Marino
    • 1
  • Francesco Rosso
    • 1
  • Gennaro Cafiero
    • 1
  • Carla Tortora
    • 1
  • Marco Moraci
    • 1
  • Manlio Barbarisi
    • 1
  • Alfonso Barbarisi
    • 1
  1. 1.Laboratory of Applied Biotechnology, Department of Anaesthesiological, Surgical and Emergency SciencesSecond University of NaplesNaplesItaly

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