Bone marrow enriched graft, modified by self-assembly peptide, repairs critically-sized femur defects in goats.
Int Orthop
; 38(11): 2391-8, 2014 Nov.
Article
en En
| MEDLINE
| ID: mdl-24902793
ABSTRACT
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.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Ingeniería de Tejidos
Límite:
Animals
Idioma:
En
Revista:
Int Orthop
Año:
2014
Tipo del documento:
Article
País de afiliación:
China