摘要
目的:研究模拟微重力环境对聚乳酸-羟基乙酸(PLGA)支架上人牙髓干细胞(hDPSCs)体内增殖能力的影响。方法:分离、培养hDPSCs并进行鉴定。以PLGA作为支架材料培养人牙髓干细胞,将hDPSCs-PLGA复合物分别在模拟微重力环境和普通重力环境下培养72h,然后移植到裸鼠背部皮下。植入4周后取出组织块,分别进行HE染色、Masson染色、Ki67和I型胶原免疫组化检测。结果:模拟微重力环境下细胞密度、胶原生成量、I型胶原表达量和Ki67阳性细胞数量明显高于普通环境(P<0.01)。结论:模拟微重力环境培养的hDPSCs的体内增殖能力高于普通重力组。
Objective: To investigate the effect of simulated microgravity enviroments on proliferation ability of human dental pulp stem cells (hDPSCs) on PLGA (Poly lactic acid glycolic acid) scaffolds in vivo. Methods: hDPSCs were seeded on PLGA scaffolds, and were cultured both on the conditions of conventional environment and simulated microgravity for 72 hours. Then, the hDPSCs--PLGA compounds were transplanted subcutaneously into immunodeficiency mice. After 4 weeks of transplantation, hematoxylin--eosin staining, Masson staining, immunohisto- chemical detection for type I collagen and Ki67 were conducted on hDPSCs--PLGA compounds. Results: In the experimental group, it displayed a higher density of cells and more collagen formation than control. In the meanwhile, it showed more collagen I expression and more positive cells of Ki67 in experimental group than that in the control group. Conclusion: In vivo, the proliferation ability of hDPSCs cultured in simulated microgravity conditions is significantly higher than that in the conventional environment.
出处
《口腔医学研究》
CAS
CSCD
2014年第6期489-492,共4页
Journal of Oral Science Research
基金
国家自然科学基金项目(编号:81271132)
黑龙江省教育厅科学技术研究项目(编号:12531234)
黑龙江省卫生厅项目(编号:2006-485)
关键词
人牙髓干细胞
模拟微重力
移植
增殖
Human dental pulp stem cells Simulated microgravity Transplantation Proliferation