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Updated: Apr 28, 2026
Use of Human Perivascular Stem Cells for Bone Regeneration
Published on: May 25, 2012
Bone marrow enriched graft, modified by self-assembly peptide, repairs critically-sized femur defects in goats
Zhiqiang Li1, Tianyong Hou, Fei Luo
1National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopaedics, Southwest Hospital, The Third Military Medical University, Chongqing, China.
Purpose:
This study focuses on nanoscale self-assembly peptides (SAP) modified demineralized bone matrix (DBM) which provided a more effective osteogenesis and regeneration for critically-sized femur defects in goats using the selective cell retention (SCR) strategy.
Methods:
RADA16-I peptide was used to modify DBM and formed a composite scaffold (SAP/DBM). The morphological change and dynamic expression of osteogenic genes of mesenchymal stem cells (MSCs) derived from marrow in SAP/DBM was observed. The cells and factors in bone marrow were enriched into SAP/DBM by technology of selective cells retension (SCR). The construct was transplanted into 20-mm femur defects in goats and their osteogenesis was evaluated.
Results:
The SAP/DBM scaffold formed a three-dimensional interweaving nanofiber in pores of DBM. MSCs exhibited better morphology in SAP/DBM than that in only DBM, and the levels of expression of ALP ,OCN and Runx2 gene in SAP/DBM samples was significantly higher than that of DBM at 14 days in vitro (P < 0.05). Compared with marrow-enriched DBM, the volume of newly formed bone from marrow-enriched SAP/DBM is higher in goats (P < 0.05).
Conclusion:
Our study may not only have a significant impact on the construction method of tissue engineering but also provide a viable, simple and effective method for clinical bone construction.
