目的:通过磁激活分选法(magnetically activated cell sorting,MACS)技术对人乳牙牙髓干细胞(stem cells from human exfoliated teeth,SHED)进行分选,获得纯度较高的CD146阳性及阴性细胞亚群,比较其生物学特性。方法:用MACS技术对SHED进行CD146分选获得未筛选的混合细胞群、CD146阳性和阴性细胞亚群,采用细胞计数试剂盒(cell counting kit-8,CCK-8)和集落形成实验(colony-forming unit,CFU)检测增殖能力;成骨诱导后进行茜素红染色,实时荧光定量聚合酶链式反应(quantitative real-time polymerase chain reaction,q PCR)检测成骨相关基因RUNX2、OCN、BSP表达;成脂诱导后进行油红O染色,q PCR检测成脂相关基因LPL、PPARG表达;成神经诱导后细胞免疫荧光检测神经细胞标志蛋白nestin、NeuN、GFAP,qPCR检测成神经相关基因nestin、MAP2表达。结果:CD146阳性和阴性细胞亚群的增殖能力都显著低于混合细胞...
【英文摘要】
Objective: Stem cells from human exfoliated teeth( SHED) were sorted by magnetically activated cell sorting( MACS) technique to obtain the CD146 positive and negative cell subpopulation.Then the biological characteristics of these subpopulations were compared to explore their specific application potential in tissue engineering. Methods: In this study,freshly extracted deciduous teeth without any caries or dental pulp disease were obtained. SHED was isolated using enzyme digestion method and then sorted by ...
【基金】
北京大学泰盛口腔医学发展基金(94000-6672-H78)资助~~
【更新日期】
2018-05-07
【分类号】
R78
【正文快照】
乳牙牙髓干细胞(stem cells from human exfolia-ted teeth,SHED)具有高度增殖能力和自我更新能力等生物学特性,可以向成牙本质细胞、成骨细胞、脂肪细胞、神经细胞、肝细胞和软骨细胞等方向分化,是组织工程的一种优良的种子细胞,但目前的试验结果仍不能满足SHED的临床应用要求