实用医学杂志 ›› 2020, Vol. 36 ›› Issue (24): 3317-3322.doi: 10.3969/j.issn.1006⁃5725.2020.24.003

• 基础研究 • 上一篇    下一篇

万古霉素/PLGA/TCP 感染性骨缺损 多孔复合材料修复羊

许刚, 何纯青,张飞,克里木, 尹东峰, 吾木尔, 刘剑, 贾勇   

  1. 新疆军区总医院 1 全军骨科中心创伤骨科(关节组),2 药剂科(乌鲁木齐 830000)
  • 出版日期:2020-12-25 发布日期:2021-01-19
  • 基金资助:
    科技援疆基金资助项目(编号:2017E0274)

Vancomycin ⁃incorporated PLGA/TCP scaffold transplanting for repair of infected femur defects in sheep

XU Gang,HE Chunqing,ZHANG Fei,KE Limu,YIN Dongfeng,WU Muer,LIU Jian,JIA Yong   

  1. Department of Orthopedics,General Hospital of Xinjiang Military Region,Urumuqi 830000,China
  • Online:2020-12-25 Published:2021-01-19

摘要:

目的 在成功制备万古霉素/PLGA/TCP 的多孔复合材料的基础上,建立羊股骨感染性骨缺 损模型,将复合支架植入骨缺损,观察其修复感染性骨缺损的效果。方法 建立苏博美利奴羊右侧股骨 感染性骨缺损模型,随机分为三组,实验组 1(3D 多孔支架组)植入万古霉素/PLGA/TCP多孔复合材料,实验组 2(骨水泥珠链组)植入含有万古霉素的聚甲基丙烯酸甲酯(PMMA)珠链,对照组 1(对照组)不植入任何材料,为单纯的骨缺损组,术后各时相点抽血测量羊血中白细胞数目、血沉和 C 反应蛋白变化;局部活 组织检查进行万古霉素含量及活性测定;二次手术后 12 周取材,行 X 线片检查及 HE 染色组织学分析,观 察支架的降解及骨生长情况。结果 所有实验动物存活。3D 多孔支架组与骨水泥珠链组都具有良好的 抗感染效果,手术后 4、8、12 周的血沉和 CRP 值明显下降,与对照组相比,差异有统计学意义(P < 0.05)。 影像学及组织学结果表明,与对照组相比,3D 多孔支架组骨缺损范围明显缩小(P < 0.01),可见更多的骨 长入(P < 0.05),骨缺损局部炎性细胞浸润不明显;与对照组相比,骨水泥珠链组炎性反应轻微,相反对照 组局部组织可见大量炎性细胞浸润,炎性反应明显。结论 采用生物打印技术制备的万古霉素/PLGA/ TCP 的多孔复合材料不仅可以掺加抗感染的药物 ,还可以根据骨缺损的形状定制植入材料,有望实现在 有效抗感染的同时,促进骨缺损的修复。

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Abstract:

Objective Based on the success in preparation of vancomycin⁃incorporated PLGA/TCP scaf⁃ fold,its effect of repair infected femur defects in goats was evaluated. Methods A goat model of infected femur defects was established and the goats were randomly assigned to three groups. The experimental group 1 was implanted with vancomycin⁃incorporated PLGA/TCP scaffold,the control group 1 was implanted with antibiotic⁃PMMA(poly⁃ methyl methacrylate)and the control group 2 was served as a blank control group. White blood cells(WBC),erythro⁃ cyte sedimentation rate(ESR)and C⁃reactive protein(CRP)were detected at different time points. The content and antibacterial activity of vancomycin were detected in local tissues. X ⁃ ray and hematoxylin ⁃eosin(HE)stain were performed to assess biodegradation of the scaffold and bone reconstruction. Results All of the animals survived. The experimental group 1 and the control group 1 had better anti ⁃infective effect. As compared with the blank control group,ESR and CRP were significantly lower in the other two groups at weeks 4,8 and 12 after operation(P < 0.05). Besides,the experimental group 1 showed more biodegradation and bone reconstruction than the control group (P < 0.05). As compared with the control group,the degree of inflammatory reaction was less in the experimental group 1 and the control group 1. Conclusions The composite vancomycin⁃incorporated PLGA/TCP porous scaffold can not only be added anti⁃infective drugs,but also customize implant materials according to the shape of femur defects. The efficacy of anti⁃infection is hopefully achieved,

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