摘要
目的:探讨骨诱导形成蛋白-2(BMP-2)诱导人牙髓细胞(DPCs)矿化的最佳条件。方法 :将人DPCs进行体外培养稳定传代,用含不同浓度BMP-2(0μg/L、50μg/L、100μg/L、150μg/L)的诱导液培养14d,另用浓度为100μg/L BMP-2诱导细胞,分别于7d、14d、21d检测各组细胞增殖情况、矿化结节的形成情况以及诱导成牙本质过程中相关牙本质涎磷蛋白(DSPP)、牙本质基质蛋白-1(DMP-1)、碱性磷酸酶(ALP)基因的表达水平。结果:不同浓度BMP-2诱导细胞过程中,诱导液浓度的改变对细胞增殖无明显作用;一定范围内随着诱导剂剂量的增加,DPCs矿化结节形成量,DSPP、DMP-1、ALP基因表达量上调,各浓度与对照组(BMP-2为0μg/L)比较,差异有统计学意义(P〈0.05),100μg/L组和50μg/L组之间的表达量比较,差异有统计学意义(P〈0.05),100μg/L组和150μg/L组比较差异无统计学意义(P〉0.05)。在100μg/L浓度BMP-2诱导下,0~14d各表达明显增长,14d组与7d组各表达量差异有统计学意义(P〈0.05),而14d组与21d组各表达量差异无统计学意义(P〉0.05)。结论:BMP-2对DPCs增殖无明显作用,但有明显诱导细胞矿化作用,最佳浓度为100μg/L,最佳天数为14d。
Objective: To investigate the optimum condition of the bone morphogenetie protein-2 (BMP 2) on the biologic activity of Human dental pulp cell (DPCs) in vitro. Methods: Human DPCs were cultured in vitro. One cell group was cultivated with different concentration of BMP-2 (0 μg/L, 50 μg/L, 100 μg/L, 150 μg/L). Another group was cultivate in different time(7,14,21 days) with a particular concentration of BMP-2(100 μg/L), while medium without BMP-2 served as the control group. The proliferation of the cells was examined by MTT assay. The quantity of calcified nodules and expression of ALP,DMP-1 and DSPP were quantified by RT-PCR. Results: BMP-2 show no effect on the proliferation of DPCs. The calcified nodules ( P 〈0.05) and the expression of DSPP ( P 〈0. 05) ,DMP-1( P 〈0.05) and ALP(P〈0.05) in- creased in both dose and time dependent manner. Conclusion: BMP-2 shows no significant effect on the proliferation of human DPCs, but can promote odontoblast differentiation. The optimum condition is 100μg/L at 14 days.
出处
《广西医科大学学报》
CAS
2015年第6期879-883,共5页
Journal of Guangxi Medical University
基金
广西自然科学基金资助项目(No.2011GXNSFA018216)
广西医疗卫生适宜技术研究与开发课题资助项目(No.S201305-02)
广西高校科学技术研究课题资助项目(No.2013YB042)
关键词
牙髓细胞
骨诱导形成蛋白-2
矿化
dental pulp cells
bone morphogenetic protein-2
differentiation