Ultrastructure of Vascularization During Osteogenesis by Tissue Engineering Technique
- VernacularTitle:组织工程骨膜成骨的构建及血管化超微结构的观察
- Author:
kai-gang, ZHANG
;
bing-fang, ZENG
;
chang-qing, ZHANG
- Publication Type:Journal Article
- Keywords:
small intestine submucosa;
tissue engineering bone;
vascularization;
ultrastructure
- From:Journal of Shanghai Jiaotong University(Medical Science)
2006;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the changes of osteoblasts and vascularization during osteogenesis by tissue engineering technique under the electron microscope and study the feasibility of improving vascularization of the tissue engineering bone by using the small intestine submucosa(SIS) as the scaffold. Methods The bone mesenchymal stem cells(BMSCs) were isolated by using the gradient centrifuge method.BMSCs were seeded in the SIS.The scaffold-cell constructs were cultured in vitro for two weeks.There were no cells on the SIS as control.They were implanted subcutaneously in the dorsa of the athymic mice.The implants were harvested after(in vivo) incubation for 4,8 and 12 weeks.The changes of osteoblasts and vascularization were observed under the transmission electron microscope and the scanning electron microscope. Results The BMSCs grew quite well.BMSCs differentiated on the surface of the SIS and secreted a great deal of extracellular matrices.The scaffold-cell constructs formed a lot of bone and vessels in vivo.The scaffold degraded after 12 weeks.No osteoblasts but vascularization and fibroblasts were observed as control. Conclusion SIS can be used as the scaffold for constructing tissue engineering bone as it can improve the formation of bone and vessels in vivo.
