中国组织工程研究

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

肝素抗凝材料联合血管束植入修复骨缺损的血管化

张春梅1,田洪玲2,赵  洁1,腾  云1,余绍芬1,孙新君1   

  1. 1解放军第八十九医院创伤骨科研究所,山东省潍坊市  261021
    2济南军区联勤部物资采购站卫生所,山东省济南市  250022
  • 收稿日期:2012-09-29 修回日期:2012-10-31 出版日期:2013-05-21 发布日期:2013-05-21
  • 通讯作者: 孙新君,副主任医师,解放军第八十九医院全军创伤骨科研究所,山东省潍坊市 261021
  • 作者简介:张春梅★,女,山东省济宁市人,汉族,2010年潍坊医学院毕业,硕士,副主任技师,主要从事临床检验和细胞生物学研究。13637895821@163.com
  • 基金资助:

    全军十一五课题(06MA096)

Vascularization of heparin-chitosan-coated acellular bone matrix combined with vascular bundles in repair of segmental bone defects

Zhang Chun-mei1, Tian Hong-ling2, Zhao Jie1, Teng Yun1, Yu Shao-fen1, Sun Xin-jun1   

  1. 1 Research Institute of Orthopedics Surgery, the 89th Hospital of PLA, Weifang  261021, Shandong Province, China
    2 Health Center of Material Procurement Station, Logistics Department of Jinan Military Region, Jinan  250022, Shandong Province, China
  • Received:2012-09-29 Revised:2012-10-31 Online:2013-05-21 Published:2013-05-21
  • Contact: Sun Xin-jun, Associate chief physician, Research Institute of Orthopedics Surgery, the 89th Hospital of PLA, Weifang 261021, Shandong Province, China
  • About author:Zhang Chun-mei★, Master, Associate chief technician, Research Institute of Orthopedics Surgery, the 89th Hospital of PLA, Weifang 261021, Shandong Province, China 13637895821@163.com
  • Supported by:

    the Project of Military “Eleventh Five-Year” Plan, No. 06MA096

摘要:

背景:前期研究显示肝素-壳聚糖脱细胞骨基质材料植入骨缺损受区后,材料内部血液供应明显改善,将血管束植入大体积抗凝材料能否促进骨缺损处血液灌注和血管化进程?
目的:观察局部抗凝的肝素-壳聚糖脱细胞骨基质材料联合血管束植入对骨缺损修复早期血液灌注及血管化的影响。
方法:取25只健康新西兰大白兔制作双侧桡骨中段20 mm长骨缺损模型,右侧植入局部抗凝的肝素-壳聚糖脱细胞骨基质材料联合自体血管束(实验组),左侧植入脱细胞骨基质材料联合自体血管束(对照组),术后1,3,7,14,28 d行CT灌注成像及组织学观察。
结果与结论:术后1 d开始,实验组血容量、血流量显著高于对照组(P < 0.05),且实验组材料中心部位有明显血液灌注,对照组植入物周围有血液渗透,此种趋势持续到术后28 d。术后1 d,实验组复合材料中有大量红细胞和有核细胞,对照组以渗透液体为主,偶见细胞;术后3-7 d,实验组复合材料网孔中有血管形成,之后逐渐增多,对照组见植入血管血栓形成、管腔闭塞,周围组织纤维化包裹,实验组各时间点材料内部血管数高于对照组(P < 0.05)。提示局部抗凝的肝素-壳聚糖脱细胞骨基质材料可促进血管束植入后材料内部的血液灌注和早期血管化进程。

关键词: 生物材料, 生物材料基础实验, 组织工程骨, 预血管化, 肝素, 壳聚糖, 脱细胞骨基质骨缺损, 血管束植入, 其他基金

Abstract:

BACKGROUND: Preliminary studies have shown that heparin-chitosan-coated acellular bone matrix implantation can significantly improve the blood supply of bone defect region. Then, large-volume anticoagulant material implantation into vascular bundles can improve blood perfusion and vascularization processes or not?
OBJECTIVE: To investigate the effects of heparin-chotisan-coated acellular bone matrix implantation combined with vascular bundles on hemoperfusion and vascularization in the early period of bone defects.
METHODS: Twenty-five healthy New Zealand white rabbits were selected to prepare 20 mm long bone defect models of the bilateral radii. Heparin-chotisan-coated acellular bone matrix combined with vascular bundles (experimental group) was implanted into the right radius, and acellular bone matrix combined with vascular bundles (control group) was implanted into the left radius. CT perfusion imaging and histological observation were done at postoperative days 1, 3, 7, 14, 28.
RESULTS AND CONCLUSION: Blood volume and blood flow were significantly higher in the experimental group than the control group from postoperative day 1 till day 28 (P < 0.05). Blood perfusion at the center of implant material and blood infiltration around the implant were found in the experimental and control groups, respectively. A large amount of red blood cells and nucleated cells within the composite material were visible in the experimental group, while permeated liquid was mainly seen in the control group at 1 day postoperatively. Within 3-7 days after implantation, new vessels appeared in the micropores of the experimental group and then increased gradually; in the control group, vascular thrombosis and luminal occlusion formed in the implanted vessels, wrapped with fibrotic surrounding tissues. The number of vessels within the implant was higher in the experimental group than the control group at each time point (P < 0.05). It indicates that implantation of heparin-chitosan-coated acellular bone matrix scaffold combined with vascular bundles can promote blood perfusion and early vascularization process.

Key words: biomaterials, basic experiments of biomaterials, tissue-engineered bone, pre-vascularized, heparin, chitosan, acellular bone matrix defects, vascular bundle implantation, other grants-supported paper

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