时长江;王鹏飞;辛大森;姜文学;

• 1:天津医科大学一中心临床学院
• 2:天津医科大学一中心临床学院卫生部危重病急救医学重点实验室
• 3:天津市第一中心医院骨科

摘要(Abstract)：

[目的]目的:探讨BMSCs复合脱细胞真皮基质(ADM)三维多孔支架体内构建组织工程软骨的可行性。[方法]首先对支架材料进行大体及扫描电镜观察,分别测定支架的孔隙直径、孔隙率、降解率;其次,分离培养兔骨髓基质细胞(BMSCs),采用扫描电镜及MTT法检测BMSCs在支架材料上的生长、增殖情况;最后取3个月龄清洁级新西兰大白兔27只,雌性,体质量(2.4±0.2)kg,随机分为3组,即A组:空白对照组(仅髁部造缺损),B组:单纯ADM覆盖,C组:ADM+BMSCs,细胞支架复合物体外培养1周后植入兔股骨髁软骨缺损处,分别在4、8、12周后对标本进行组织学、免疫化学检测及ICRS评分。[结果]测量示支架孔隙直径为(101.2±9.3)um,孔隙率为88.6%±2.7%,降解率2周为(13.83±7.12)%,4周为(25.66±8.19)%。MTT法显示细胞在支架上生长良好,与对照组相比,吸光度值差异无统计学意义(P>0.05),提示支架相容性良好,无细胞毒性。经过最长12周培养后取材进行组织学、免疫化学检测,结果显示ADM+BMSCs组软骨缺损获得了更为满意的修复效果:关节表面平坦光滑,与周围组织未见明显界限;组织学染色证实软骨基质分泌旺盛并有典型软骨细胞形成,组织结构类似正常关节软骨,ADM+BMSCs组术后第4、8、12周ICRS评分均高于其他两组,差异具有统计学意义(P<0.05)。[结论]ADM孔隙均匀,组织相容性好,适于细胞粘附及长期生长,是一种适用于软骨组织工程的良好载体。BMSCs-ADM支架复合体在体内成功构建组织工程软骨,可进一步用于软骨组织工程研究。

关键词(KeyWords)： 脱细胞真皮基质;BMSCs;软骨修复;组织工程

Abstract:

Keywords:

基金项目(Foundation): 天津市卫生局科技基金重点攻关课题(编号:11KG109)

作者(Author): 时长江;王鹏飞;辛大森;姜文学;

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DOI:

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