大鼠牙乳头细胞与纳米羟基磷灰石的体外复合培养

Rat dental papilla cell culture with nanometer-HAP in vitro

目的:初步探讨多孔纳米羟基磷灰石(nano-hydroxyapatite,nano-HAP)对体外培养的大鼠牙乳头细胞(rat dental papilla cells,RDPC)增殖和分化功能的影响,以及nano-HAP作为牙组织工程支架材料的可行性。方法:实验组为RDPC与nano-HAP复合培养,对照组为RDPC常规培养。通过电镜观察RDPC在nano-HAP表面生长与附着状态,同时检测细胞增殖状况、细胞蛋白含量和碱性磷酸酶(alkalinephos phatase,ALP)等,评价RDPC生长情况和细胞活性。结果:实验组生长良好,6d和8d时实验组RDPC增殖明显高于对照组;6d和9d时实验组细胞总蛋白含量高于对照组;各时间点两组细胞ALP差异无统计学意义。结论:nano-HAP具有良好的生物相容性,能使RDPC细胞增殖,并可使其活性明显增强,可作为牙组织工程备选的支架材料;RDPC与牙组织工程支架材料复合培养可作为体外评价牙组织工程支架材料生物相容性的方法之一。

Objective To determine the effects of nano-hydroxyapatite （nano-HAP）on the proliferation and activity of rat dental papilla cells （ RDPCs ） in vitro, and to evaluate the feasibility of using nano-hydroxyapatite （nano-HAP）as dental papilla cell scaffold in dental tissue engineering. Methods RDPCs cultured with the porous nano-HAP in vitro served as the experimental group, and the routine culture of RDPCs in flasks served as the control. Scanning electronic microscope was used to observe the growth and adherence of the RDPCs to nano-HAP. Cell proliferation, cellular protein content, and alkaline ph RDPCs proliferated well, osphatase （ALP） were detected to assess the cellular activities. Results and adhered to the outer and inner surface of the nano-HAP scaffold. Compared with the control group, cells in the experimental group presented higher proliferation on 6 d and 8 d and higher cellular protein content on 6 d and 9 d. No significant difference was detected in the ALP activity in the 2 groups. Conclusion RDPCs seeded into nano-HAP grow better and have more vigorous cellular activity, suggesting that nano-HAP has excellent biocompatibility with dental papilla cells, and it can serve as a promising scaffold for dental tissue engineering.