摘要
背景:研究证明骨膜在骨缺损的修复方面起着重要作用,然而大段骨缺损常常伴随骨膜的缺失。因此运用组织工程学原理构建组织工程骨膜修复骨缺损已成为研究热点。目的:通过外周血来源间充质干细胞复合猪小肠黏膜下层构建组织工程骨膜,观察其包被双相陶瓷磷酸钙支架对兔骨缺损的修复。方法:将外周血间充质干细胞接种于SIS膜(猪小肠黏膜下层)上构建组织工程骨膜,并通过活死细胞染色观察间充质干细胞生长情况。取30只新西兰兔构建15 mm尺骨缺损模型,随机等分为空白对照组、单纯磷酸钙陶瓷组、组织工程骨膜包被磷酸钙陶瓷组分别进行相应的骨缺损修复处理。通过术后标本影像学、组织学观察对比3组骨缺损修复情况。结果与结论:(1)外周血间充质干细胞接种于SIS膜后细胞活死染色发现间充质干细胞生长良好,数量逐渐增多;(2)X射线片Lane-Sandhu评分:体内实验中,术后4,8周组织工程骨膜包被磷酸钙陶瓷组X射线片Lane-Sandhu评分显著高于单纯磷酸钙陶瓷组(P<0.05),单纯磷酸钙陶瓷组高于空白对照组(P<0.05);(3)组织学变化:术后4,8周组织工程骨膜包被磷酸钙陶瓷组骨基质形成多于单纯磷酸钙陶瓷组,基质周围有较多成骨细胞分布;(4)结果显示,外周血间充质干细胞和SIS膜构建的组织工程骨膜包被双相陶瓷磷酸钙对骨缺损有良好的修复作用。
BACKGROUND：Periosteum has been shown to play an important role in bone defect repair, but large bone defects are often accompanied by the loss of periosteum. Therefore, tissue-engineered periosteum constructed by tissue engineering technology is attracting more attention. OBJECTIVE：To investigate the effect of the tissue-engineered periosteum which is constructed by mesenchymal stem cel s from the peripheral blood and procine smal intestinal submucosa and biphasic calcium phosphates on the repair of bone defects in rabbits. METHODS：Mesenchymal stem cel s from peripheral blood were seeded onto the procine smal intestinal submucosa to construct the tissue-engineered periosteum, and then the cel growth was observed through live/dead staining. The bone defect model of 15 mm in length in the left ulna was created in the 30 healthy New Zealand rabbits, fol owed by randomly assigned to 3 groups, and then treated with biphasic calcium phosphates and tissue-engineered periosteum-coated biphasic calcium phosphates, respectively. The remaining rabbits received no treatment as controls. Therapeutic effects were compared by X-ray and histological examinations among groups. RESULTS AND CONCLUSION：Live/dead staining found that the mesenchymal stem cel s grew wel and the cel number increased gradual y. X-ray Lane-Sandhu scores of the group treated with tissue-engineered periosteum-coated biphasic calcium phosphates were highest, fol owed by the biphasic calcium phosphates group and the control group at postoperative 4 and 8 weeks （P〈0.05）. Histological examination showed that the group treated with tissue-engineered periosteum-coated biphasic calcium phosphates had more osteoblasts, compared with the other two groups. In conclusion, the biphasic calcium phosphate scaffold coated by the tissue-engineered periosteum that is constructed by mesenchymal stem cel s from peripheral blood and procine smal intestinal submucosa is feasible to repair bone defects.
出处
《中国组织工程研究》
CAS
北大核心
2016年第47期7006-7013,共8页
Chinese Journal of Tissue Engineering Research
基金
国家自然科学基金(31370984)~~
