口腔生物医学 ›› 2024, Vol. 15 ›› Issue (2): 75-81.

• 论著 • 上一篇    下一篇

基于核壳结构微囊构建三维牙髓细胞球及初步体外研究

姜明言1,田卫东2,谢利3   

  1. 1. 四川大学华西口腔医学院
    2. 口腔转化医学教育部工程中心(四川大学),口腔再生医学国家地方联合工程实验室(四川大学),口腔疾病研究国家重点实验室(四川大学),国家口腔疾病临床医学研究中心(四川大学),四川大学华西口腔医院创伤整形外科
    3. 四川大学华西口腔医院
  • 收稿日期:2024-01-05 修回日期:2024-03-18 出版日期:2024-04-25 发布日期:2024-04-29
  • 通讯作者: 谢利 E-mail:samuel0121@163.com
  • 基金资助:
    基于再生原理的牙颌生物重建及转化应用研究;“持续产氧+光响应”核壳微球的构建及其调控牙周局部微生态治疗牙周炎的研究

Study of core-shell microcapsules for dental pulp stem cell spheroid formation

Ming-Yan JIANG1,Wei-Dong TIAN   

  • Received:2024-01-05 Revised:2024-03-18 Online:2024-04-25 Published:2024-04-29

摘要: 目的:利用同轴静电液滴技术设计并制备一种用于牙髓干细胞(DPSCs)三维细胞球体构建、培养的核壳微囊作为。方法:获取临床收集DPSCs并通过流式细胞仪进行细胞鉴定;构建核壳微囊,调节内外相溶液浓度、流速和细胞密度等参数,对比微囊形貌及尺寸筛选最佳制备条件;活死染色和CCK-8实验检测微囊内的细胞球的细胞活性,细胞骨架染色观察其形态。结果:成功分离培养DPSCs,构建以海藻酸钠(Alg)为壳层和羧甲基纤维素(CMC)为核层的载细胞微囊。当细胞密度为1×108个/mL时,微囊内的DPSCs在24 h内能自发形成直径为(101.93±10.11)μm的单一球体。活死染色显示培养7 d内细胞存活率未明显降低(P>0.05),CCK-8显示培养4 d时细胞增殖率增加至(114.91%±7.70%)(P<0.05),7 d时增长至(169.05%±5.29%)(P<0.001)。结论:该方法制备的核壳微囊可以促进DPSCs形成三维细胞球并长期存活。

Abstract: Objective:?To develop a novel strategy for the construction and cultivation of three-dimensional cell spheroids from dental pulp stem cells (DPSCs) with coaxial-electrospray method. Methods:?DPSCs were isolated from clinically collected teeth and then identified through flow cytometry. Core-shell microcapsules were constructed. By adjusting the concentration and flow rates of internal and external phase solutions and cell density, the morphology and size of the microcapsules were observed to get the best preparation condition. Cell viability was detected through live/dead staining and CCK-8 assay, and the spheroids was observed using cytoskeletal staining. Results:?DPSCs were successfully isolated and cultured. Cell-laden microcapsule with alginate layer and carboxymethylcellulose core structure was fabricated. When the cell density within microcapsules reached 1×108 cells/mL, the DPSCs within a single microcapsule formed a spheroid spontaneously with a diameter of (101.93±10.11) μm within 24 hours. Live/dead staining showed the cell survival rate did not decrease within 7 days(P>0.05). CCK-8 assay revealed an increase in cell proliferation rate to (114.91%±7.70%) after 4 days of culture (P<0.05), which further grew to (169.05%±5.29%) at 7 days (P<0.001). Cytoskeletal staining revealed that the cultured cells formed dense spheroids. Conclusions:? These core-shell microcapsules could promote the formation of DPSCs cell spheroids and maintain their long-term survival.