中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (19): 4022-4028.doi: 10.12307/2025.071

• 牙髓及牙周膜干细胞 Dental pulp and periodontal ligament stem cells • 上一篇    下一篇

光交联复合水凝胶支架中人牙髓干细胞的成骨/成牙分化能力

杨杜娟1,程梦可1,刘  佳1,2   

  1. 1新疆医科大学第一附属医院(附属口腔医院)儿童口腔科-口腔预防科,新疆维吾尔自治区乌鲁木齐市   830054;2新疆维吾尔自治区口腔医学研究所,新疆维吾尔自治区乌鲁木齐市   830054
  • 收稿日期:2024-02-20 接受日期:2024-04-27 出版日期:2025-07-08 发布日期:2024-09-12
  • 通讯作者: 刘佳,博士,副教授,副主任医师,硕士生导师,新疆医科大学第一附属医院(附属口腔医院)儿童口腔科-口腔预防科,新疆维吾尔自治区乌鲁木齐市 830054;新疆维吾尔自治区口腔医学研究所,新疆维吾尔自治区乌鲁木齐市 830054
  • 作者简介:杨杜娟,女,1998年生,新疆医科大学在读硕士,主要从事儿童口腔医学方向研究。
  • 基金资助:
    新疆自治区研究生实践创新项目(XJ2023G176),项目负责人:程梦可

Osteogenic/odontogenic differentiation ability of human dental pulp stem cells under photocrosslinked composite hydrogel scaffold

Yang Dujuan1, Cheng Mengke1, Liu Jia1, 2   

  1. 1Department of Pediatric Dentistry-Preventive Stomatology, First Affiliated Hospital (Affiliated Stomatological Hospital) of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; 2Institute of Stomatology of Xinjiang Uygur Autonomous Region, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Received:2024-02-20 Accepted:2024-04-27 Online:2025-07-08 Published:2024-09-12
  • Contact: Liu Jia, MD, Associate professor, Associate chief physician, Master’s supervisor, Department of Pediatric Dentistry-Preventive Stomatology, First Affiliated Hospital (Affiliated Stomatological Hospital) of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; Institute of Stomatology of Xinjiang Uygur Autonomous Region, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • About author:Yang Dujuan, Master candidate, Department of Pediatric Dentistry-Preventive Stomatology, First Affiliated Hospital (Affiliated Stomatological Hospital) of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    Graduate Practice Innovation Project of Xinjiang Uygur Autonomous Region, No. XJ2023G176 (to CMK)

摘要:

文题释义:

甲基丙烯酸酐改性明胶:是明胶和甲基丙烯酸酐反应产生的一种改性明胶,因含有甲基丙烯酰基而具有光交联的特征。经过紫外线交联可制成相对稳定的水凝胶,具有良好的生物相容性和降解率,可为细胞的黏附及增殖提供良好的生长环境。 
经处理牙本质基质:颜色为淡黄色,主要成分为Ⅰ型胶原和非胶原蛋白,是从离体牙中将牙本质分离出来,通过脱矿、研磨、过筛后得到的一种天然物质,保留了天然牙本质小管的基本结构,其中含有多种生长因子,可促进细胞的增殖、分化。

摘要
背景:甲基丙烯酸酐改性明胶(gelatin-methacryloyl,Gel-MA)与经处理牙本质基质(treated dentin matrix,TDM)在一定比例下经过紫外线交联后形成的复合水凝胶支架具有良好的孔隙率、机械性能、溶胀性能及生物降解率,这为临床上年轻恒牙的牙髓再生提供了新的思路和方法。
目的:探究1∶2质量比Gel-MA/TDM复合光交联水凝胶支架对人牙髓干细胞增殖能力及成骨/成牙本质分化能力的影响。
方法:将第3代牙髓干细胞接种至1∶2质量比Gel-MA/TDM复合水凝胶支架中,采用CCK-8实验检测人牙髓干细胞在复合水凝胶支架中的增殖能力。将第3代牙髓干细胞接种至1∶2质量比Gel-MA/TDM复合水凝胶支架中并进行成骨诱导,采用碱性磷酸酶染色及茜素红染色观察矿化结节的形成情况,采用RT-PCR检测成牙相关因子(牙本质基质蛋白1、牙本质涎磷蛋白)和成骨相关因子(骨钙素、Runt相关转录因子2)的基因表达。
结果与结论:①CCK-8检测结果显示,前7 d的牙髓干细胞增殖能力明显升高,第10天时速度减缓;②碱性磷酸酶染色及茜素红染色结果显示,Gel-MA/TDM复合水凝胶组牙髓干细胞的碱性磷酸酶活性及矿化结节生成强于单纯Gel-MA水凝胶组(P < 0.05);③RT-PCR结果显示,

Gel-MA/TDM复合水凝胶组牙髓干细胞中牙本质基质蛋白1、牙本质涎磷蛋白、骨钙素、Runt相关转录因子2的基因表达量明显高于单纯Gel-MA水凝胶组(P < 0.05),且14 d基因表达量明显高于7 d(P < 0.05)。结果表明,培养在1∶2 Gel-MA/TDM复合水凝胶支架上的牙髓干细胞表现出较好的增殖能力,能够强化牙髓干细胞的成骨、成牙本质分化能力。

https://orcid.org/0009-0007-6928-9446 (杨杜娟) 


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 牙髓再生, 甲基丙烯酸酐改性明胶, 牙本质基质, 复合支架, 牙髓干细胞, 成骨, 成牙本质

Abstract: BACKGROUND: The composite hydrogel scaffold formed by crosslinking of gelatin-methacryloyl (Gel-MA) and treated dentin matrix (TDM) under a certain proportion of ultraviolet light has good porosity, mechanical properties, swelling properties, and biodegradation rate, which provides a new idea and method for clinical pulp regeneration of young permanent teeth.
OBJECTIVE: To explore the effect of Gel-MA/TDM composite hydrogel scaffold with 1:2 mass ratio on the proliferation ability and osteogenic/odontoblast differentiation ability of human dental pulp stem cells. 
METHODS: The passage 3 dental pulp stem cells were inoculated into the Gel-MA/TDM composite hydrogel scaffold with a mass ratio of 1:2. The proliferation ability of human dental pulp stem cells in the composite hydrogel scaffold was detected by CCK-8 assay. Dental pulp stem cells at passage 3 were cultured in Gel-MA/TDM composite hydrogel scaffold with a mass ratio of 1:2 for osteogenic induction. The formation of mineralized nodules was observed by alkaline phosphatase and alizarin red staining. The gene expression levels of odontogenic factors (dentin matrix protein 1, dentin sialophosphoprotein), and osteogenic factors (osteocalcin, Runt-related transcription factor 2) were detected by RT-PCR.
RESULTS AND CONCLUSION: (1) The results of CCK-8 assay showed that the proliferation ability of dental pulp stem cells increased significantly in the first 7 days, and slowed down on day 10. (2) The results of alkaline phosphatase staining and alizarin red staining showed that the alkaline phosphatase activity and the formation of mineralized nodules of dental pulp stem cells in the Gel-MA/TDM composite hydrogel group were stronger than those in Gel-MA hydrogel group (P < 0.05). (3) RT-PCR results showed that the gene expression levels of dentin matrix protein 1, dentin sialophosphoprotein, osteocalcin, and Runt-related transcription factor 2 in dental pulp stem cells in Gel-MA/TDM composite hydrogel group were significantly higher than those in Gel-MA hydrogel group (P < 0.05). The gene expression level at 14 days was significantly higher than that at 7 days (P < 0.05). The results conclude that the dental pulp stem cells cultured on Gel-MA/TDM composite hydrogel scaffolds with a mass ratio of 1:2 exhibit a good proliferation ability, which can strengthen the osteogenic and odontogenic differentiation abilities of dental pulp stem cells.

Key words: dental pulp regeneration, gelatin-methacryloyl, dentinal matrix, composite scaffold, dental pulp stem cell, osteogenesis, odontogenic

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