Journal of Materials Science: Materials in Medicine

, Volume 23, Issue 4, pp 1073–1084

The healing of critical-size calvarial bone defects in rat with rhPDGF-BB, BMSCs, and β-TCP scaffolds

Article

DOI: 10.1007/s10856-012-4558-x

Cite this article as:
Xu, L., Lv, K., Zhang, W. et al. J Mater Sci: Mater Med (2012) 23: 1073. doi:10.1007/s10856-012-4558-x

Abstract

Platelet-derived growth factor-BB (PDGF-BB) plays important roles in regenerating damaged tissue. In this study we investigated the effects of a tissue-engineered bone combined with recombinant human PDGF-BB (rhPDGF-BB), bone marrow stem cells (BMSCs) and β–tricalcium phosphate (β-TCP) to repair critical-size calvarial bone defects in rat. Proliferation and osteogenic differentiation of BMSCs treated with different concentration rhPDGF-BB (0, 10, and 50 ng/ml) was evaluated by MTT, alkaline phosphatase (ALP) activity, alizarin red staining and real-time quantitative PCR (RT-qPCR) analysis of osteogenic gene. BMSCs were then combined with rhPDGF-BB-loaded β-TCP and transplanted into 5 mm calvarial bone defects. The new bone formation and mineralization was evaluated by micro-computerized tomography (Micro-CT) and histological analysis at week 8 after operation. It was observed that the proliferation of BMSCs treated with rhPDGF-BB was enhanced with a time- and dose- dependent manner. There were increased ALP activity, mineralized deposition and elevated mRNA levels of osteogenic gene for BMSCs treated with rhPDGF-BB, particularly in the 50 ng/ml group. Histological analysis showed new bone formation and mineralization in the rhPDGF-BB/BMSCs/β-TCP group was significantly higher than BMSCs/β-TCP, rhPDGF-BB/β-TCP, and β-TCP alone group (P < 0.05). In conclusion, rhPDGF-BB/BMSCs/β-TCP is a promising tissue-engineered bone for craniofacial bone regeneration.

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Department of Prosthodontics, School of Stomatology, Ninth People’s Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of MedicineShanghai Research Institute of StomatologyShanghaiChina
  2. 2.Oral Bioengineering Lab, Shanghai Research Institute of Stomatology, Ninth People’s Hospital, Shanghai Key Laboratory of StomatologyShanghai Jiao Tong University School of MedicineShanghaiChina