Zoekopdracht:
faculteit: "ACTA" en publicatiejaar: "2010"
| Auteurs | D.C.E. Kraft, D.A. Bindslev, B. Melsen, B.M. Abdallah, K. Kassem, J. Klein-Nulend | | Titel | Mechanosensitivity of dental pulp stem cells is related to their osteogenic maturity |
| Tijdschrift | European Journal of Oral Sciences |
| Jaargang | 118 |
| Jaar | 2010 |
| Nummer | 1 |
| Pagina's | 29-38 |
| ISSN | 09098836 |
| Faculteit | ACTA |
| Samenvatting | For engineering bone tissue, mechanosensitive cells are needed for bone (re)modelling. Local bone mass and architecture are affected by mechanical loading, which provokes a cellular response via loading-induced interstitial fluid flow. We studied whether human dental pulp-derived mesenchymal stem cells (PDSCs) portraying mature (PDSC-mature) or immature (PDSC-immature) bone cell characteristics are responsive to pulsating fluid flow (PFF) in vitro. We also assessed bone formation by PDSCs on hydroxyapatite-tricalcium phosphate granules after subcutaneous implantation in mice. Cultured PDSC-mature exhibited higher osteocalcin and alkaline phosphatase gene expression and activity than PDSC-immature. Pulsating fluid flow (PFF) stimulated nitric oxide production within 5 min by PDSC-mature but not by PDSC-immature. In PDSC-mature, PFF induced prostaglandin E2 production, and cyclooxygenase 2 gene expression was higher than in PDSC-immature. Implantation of PDSC-mature resulted in more osteoid deposition and lamellar bone formation than PDSC-immature. We conclude that PDSCs with a mature osteogenic phenotype are more responsive to pulsating fluid shear stress than osteogenically immature PDSCs and produce more bone in vivo. These data suggest that PDSCs with a mature osteogenic phenotype might be preferable for bone tissue engineering to restore, for example, maxillofacial defects, because they might be able to perform mature bone cell-specific functions during bone adaptation to mechanical loading in vivo. |
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