釉基质蛋白联合骨髓基质细胞膜片促进类牙骨质异位生成的实验研究

doi:10.3969/j.issn.1005-4979.2014.02.002

《口腔颌面外科杂志》 ›› 2014, Vol. 24 ›› Issue (2): 90-. doi: 10.3969/j.issn.1005-4979.2014.02.002

釉基质蛋白联合骨髓基质细胞膜片促进类牙骨质异位生成的实验研究

王晓宇，卢玉旺，刘宏伟

同济大学口腔医学院口腔生物医学及转化医学实验室，上海 200072

出版日期:2014-04-28 发布日期:2014-06-27
通讯作者: 刘宏伟，教授. E-mail:hwliu_ml@163.com
作者简介:王晓宇（1987—），女，安徽合肥人，博士研究生.E-mail: sherrywang69@163.com
基金资助:
国家自然科学基金（81271152）；上海市科委科技计划项目（07119514）

EMPs-coated Dentin Enhances Bone Marrow Stromal Cells in Periodontal Regeneration in vivo

WANG Xiao-yu, LU Yu-wang, LIU Hong-wei

Laboratory of Oral Biomedical Science and Translational Medicine, School of Stomatology,
Tongji University, Shanghai 200092, China

Online:2014-04-28 Published:2014-06-27

摘要/Abstract

摘要： 目的：研究釉基质蛋白(enamel matrix proteins, EMPs）诱导犬骨髓基质细胞（bone marrow stromal cells，BMSCs）在裸鼠体内促进类牙骨质异位生成的作用和意义。方法：体外分离培养犬骨髓基质细胞并制备细胞膜片，包裹于牙本质根片上，与煅烧骨块紧密贴合捆绑后，制成牙根片/细胞膜片/煅烧骨复合物，体外模拟根周系统。据牙根片是否事先涂覆釉基质蛋白（EMPs），分为实验组和对照组。将2组的“牙根片/细胞膜片/煅烧骨复合物”分别植入裸鼠背部皮下，8周后取材，进行组织学观察和免疫组化检测。结果：实验组的根片上新生出了不规则类牙骨质样物质，并有矿化基质沉淀，有较强骨桥素(osteopontin，OPN)表达；对照组根片上未见类牙骨质样物质或矿化基质沉淀，OPN表达较弱。结论：釉基质蛋白在体内能诱导骨髓基质细胞向类成牙骨质细胞方向分化，从而促进牙周再生。

关键词: 骨髓基质细胞, , , 釉基质蛋白, , , 细胞膜片, , , 牙周再生, , , 犬, , , 裸鼠

Abstract: Objective: To study the potentials of enamel matrix proteins ( EMPs) in enhancing the differentiation and mineralization of bone marrow stromal cells (BMSCs) in periodontal regeneration. Methods: Beagle dog's BMSCs were isolated and cultured as seed cells to form cell sheets. Preparation of root dentin sections were obtained from dog's anterior teeth. EMPs were coated on the surface of root dentin sections. BMSCs sheets were used to encapsulate the EMPs coated root dentin sections. These constructs were finally combined with calcinated ceramic bovine bone (CBB) as scaffolds. Study was divided into two groups. Root dentin sections of group A coated with EMPs. In group B, no EMPs was covered in root dentin sections as control. The composite constructs were implanted subcutaneously into the dorsal aspect in nude mice. The histological observation and immunohistochemical detection was carried out 8 weeks after implantation. Results: In the test group, there were new irregular cementum like tissues on the surface of the roots, and the deposition of matrix mineralization was observed with the intensive expression of osteopontin (OPN). While in the control group, no similar cementum like structure or deposition of matrix mineralization was observed on the roots surface, and the expression of osteopontin was weak. Conclusion: EMPs promotes the differentiation of BMSCs into cementoblasts on the surface of dentin roots in vivo, and the mechanism is possibly related to the expression of OPN.

Key words: bone marrow stem cells, enamel matrix protein, cell sheet, periodontal regeneration, dog, nude mice

中图分类号:

R782.2

王晓宇，卢玉旺，刘宏伟. 釉基质蛋白联合骨髓基质细胞膜片促进类牙骨质异位生成的实验研究[J]. 《口腔颌面外科杂志》, 2014, 24(2): 90-.

WANG Xiao-yu, LU Yu-wang, LIU Hong-wei. EMPs-coated Dentin Enhances Bone Marrow Stromal Cells in Periodontal Regeneration in vivo[J]. 《Journal of Oral and Maxillofacial Surgery》, 2014, 24(2): 90-.

https://journal06.magtech.org.cn/Jweb_joms/CN/Y2014/V24/I2/90

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釉基质蛋白联合骨髓基质细胞膜片促进类牙骨质异位生成的实验研究

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