中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (1): 90-95.doi: 10.12307/2022.015

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

骨质疏松症小鼠脂肪干细胞结合双相磷酸钙陶瓷修复骨质疏松症小鼠颅骨缺损

敬  劲1,赵珊笛1,陈  龙1,彭双麟1,唐  辉1,郭代金1,曾馨仪2,肖金刚1,3   

  1. 西南医科大学,1口腔医学院,2临床医学院,四川省泸州市  646000;3西南医科大学附属口腔医院口颌面修复重建和再生实验室,四川省泸州市  646000
  • 收稿日期:2020-07-21 修回日期:2020-07-22 接受日期:2020-09-15 出版日期:2022-01-08 发布日期:2021-10-25
  • 通讯作者: 肖金刚,博士,教授,西南医科大学口腔医学院,四川省泸州市 646000;西南医科大学附属口腔医院口颌面修复重建和再生实验室,四川省泸州市 646000
  • 作者简介:敬劲,男,1996年生,四川省射洪市人,汉族,重庆医科大学在读硕士,主要从事口腔基础与临床研究。
  • 基金资助:
    国家自然科学基金项目(81870746,81371125),项目负责人:肖金刚;四川省科技厅项目(2014JY0044),项目负责人:肖金刚;国家级大学生创新训练项目(201810632052X),项目负责人:敬劲;泸州市人民政府-西南医科大学科技战略合作项目[2015LZCYD-S05(2/12)],项目负责人:肖金刚

Repair of calvarial defects in osteoporotic mice by adipose-derived stem cells combined with biphasic calcium phosphate ceramic scaffold

Jing Jin1, Zhao Shandi1, Chen Long1, Peng Shuanglin1, Tang Hui1, Guo Daijin1, Zeng Xinyi2, Xiao Jingang1, 3   

  1. 1College of Stomatology, 2College of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China; 3Orofacial Reconstruction and Regeneration Laboratory of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Received:2020-07-21 Revised:2020-07-22 Accepted:2020-09-15 Online:2022-01-08 Published:2021-10-25
  • Contact: Xiao Jingang, MD, Professor, College of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China; Orofacial Reconstruction and Regeneration Laboratory of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Jing Jin, Master candidate, College of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81870746, No. 81371125 (to XJG); the Program of Sichuan Science and Technology Bureau, No. 2014JY0044 (to XJG); the National Training Program of Innovation and Entrepreneurship for Undergraduates, No. 201810632052X (to JJ); the LuZhou Municipal People’s Government-the Science and Technology Strategic Cooperation Project of Southwest Medical University, No. 2015LZCYD-S05(2/12) (to XJG)

摘要:

文题释义:
骨极量缺损:是指动物自身无法修复的最小骨缺损,GUPTA等及SCHMIZ等研究确定小鼠及大鼠颅骨极量缺损范围分别为4 mm和8 mm。通过建立骨极量缺损动物模型,排除动物自身因素(如年龄、种系、骨缺损部位等)对骨缺损重建的干扰,从而更加准确地评估修复材料的骨缺损重建效果。
双相磷酸钙:是由一定比例的羟基磷灰石及β-磷酸三钙构成的生物活性材料,其化学组分与骨组织的无机成分相似,各项性能(如生物相容性、生物活性、骨传导性、骨诱导性、物理机械性能等)均较优异,故有望成为理想的骨替代材料。

背景:相关研究表明双相磷酸钙可有效重建骨质疏松症伴颅骨极量缺损动物模型的骨质缺损,另有研究展望了脂肪干细胞在骨质疏松性骨折及其继发骨缺损防治中的潜在应用前景,课题组前期研究结果表明,相较于正常脂肪干细胞,骨质疏松症小鼠脂肪干细胞(osteoporosis adipose-derived stem cells,OP-ASCs)的体外增殖能力及成骨分化潜能显著降低。
目的:探讨OP-ASCs结合双相磷酸钙对骨质疏松症小鼠颅骨极量缺损的重建效果。
方法:18只C57BL/6雌性小鼠随机均分为3组:空白组、双相磷酸钙组、OP-ASCs/双相磷酸钙组,建立骨质疏松症小鼠颅骨极量缺损模型,空白组不植入材料,另两组分别植入双相磷酸钙、OP-ASCs/双相磷酸钙复合体。各组于第8周及12周分别处死3只小鼠,采用Micro-CT、苏木精-伊红染色、Masson染色检测其颅骨缺损部位骨形成差异。
结果与结论:①术后第8周及第12周,空白组仅在颅骨缺损边缘可见少量新生骨组织,而另两组颅骨缺损部位可见明显新生骨组织,且OP-ASCs/双相磷酸钙组新生骨组织明显多于双相磷酸钙组(P < 0.05);②第12周,双相磷酸钙组及OP-ASCs/双相磷酸钙组新生骨组织均明显多于第8周(P < 0.05),且第12周OP-ASCs/双相磷酸钙组新生骨组织与双相磷酸钙组的差距较第8周更为明显(P < 0.05);③结果表明,OP-ASCs/双相磷酸钙复合体对骨质疏松症小鼠颅骨极量缺损具有良好的重建效果,且重建效果较单纯双相磷酸钙更佳。
https://orcid.org/0000-0003-3758-1315(敬劲) 

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: 脂肪干细胞, 骨质疏松症, 卵巢切除术, 组织块贴壁法, 双相磷酸钙, 颅骨, 极量缺损, 骨组织工程

Abstract: BACKGROUND: Researches have shown that biphasic calcium phosphate can be used as an effective bone substitute for the repair of critical-size defects in animal models with osteoporosis, and osteoporosis adipose-derived stem cells (OP-ASCs) is promising for medical applications in patients with osteoporotic fractures and its secondary bone defects. The previous research results of the research group showed that compared with normal adipose-derived stem cells, the in vitro proliferation and osteogenic differentiation potential of OP-ASCs from osteoporosis mice were obviously reduced. 
OBJECTIVE: To investigate the effect of OP-ASCs combined with biphasic calcium phosphate on the repair of calvarial critical-size defects in osteoporotic mice. 
METHODS: Eighteen C57BL/6 female mice were divided into three groups randomly: blank group, biphasic calcium phosphate group, and OP-ASCs/biphasic calcium phosphate group. The models of osteoporosis with calvarial critical-size defects were established in each group, and then the blank group was not implanted with materials. The biphasic calcium phosphate and OP-ASCs/biphasic calcium phosphate groups were implanted with biphasic calcium phosphate ceramic scaffolds only, and OP-ASCs/biphasic calcium phosphate admixtures separately. The mice were sacrificed at the 8 (n=3) and 12 (n=3) weeks. The differences in bone formation at the calvarial defects were detected by micro-CT, hematoxylin-eosin staining, and Masson Trichrome staining.   
RESULTS AND CONCLUSION: (1) There was a small amount of bone formation in the blank group both at 8 and 12 weeks after implantation, and the new bone tissue grown well in both the biphasic calcium phosphate group and the OP-ASCs/biphasic calcium phosphate group; the OP-ASCs/biphasic calcium phosphate group achieved more bone formation than that of the biphasic calcium phosphate group (P < 0.05). (2) Compared with that at 8 weeks, both the biphasic calcium phosphate group and the OP-ASCs/biphasic calcium phosphate group showed more bone formation at 12 weeks (P < 0.05), and the difference of bone formation between the OP-ASCs/biphasic calcium phosphate group and the biphasic calcium phosphate group was more obvious than that at 8 weeks (P < 0.05). (3) To conclude, OP-ASCs combined with biphasic calcium phosphate could repair the calvarial critical-size defects in osteoporosis mice effectively to some extent, and the effect is better than that of the biphasic calcium phosphate used alone. 

Key words: adipose stem cells, osteoporosis, ovariectomy, explants culture method, biphasic calcium phosphate, skull, critical-size defect, bone tissue engineering

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