中国组织工程研究

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

纳米羟基磷灰石复合基因转染生长因子修复牙槽骨缺损

朱建华1,袁  旭1,魏佳佳1,刘继光2   

  1. 1佳木斯大学附属口腔医院牙周黏膜科,黑龙江省佳木斯市 154007
    2佳木斯大学口腔医学院,黑龙江省佳木斯市 154007
  • 收稿日期:2012-09-20 修回日期:2012-10-16 出版日期:2013-05-21 发布日期:2013-05-21
  • 通讯作者: 刘继光,博士,教授,佳木斯大学,黑龙江省佳木斯市154007 liujg5550@163.com
  • 作者简介:朱建华,女,1959年生,黑龙江省佳木斯市人,汉族,教授,主要从事牙周黏膜病方面的研究。 Zhu8622877@yahoo.com.cn
  • 基金资助:

    黑龙江省自然科学基金(D201016)

Growth factor genetic modification and nano-hydroxyapatite composite for repair of alveolar bone defects

Zhu Jian-hua1, Yuan Xu1, Wei Jia-jia1, Liu Ji-guang2   

  1. 1 Department of Periodontal Mucosa, Affiliated Stomatological Hospital of Jiamusi University, Jiamusi  154007, Heilongjiang Province, China
    2 Stomatological School of Jiamusi University, Jiamusi  154007, Heilongjiang Province, China
  • Received:2012-09-20 Revised:2012-10-16 Online:2013-05-21 Published:2013-05-21
  • Contact: Liu Ji-guang, M.D., Professor, Stomatological School of Jiamusi University, Jiamusi 154007, Heilongjiang Province, China liujg5550@163.com
  • About author:Zhu Jian-hua, Professor, Department of Periodontal Mucosa, Affiliated Stomatological Hospital of Jiamusi University, Jiamusi 154007, Heilongjiang Province, China Zhu8622877@yahoo.com.cn
  • Supported by:

    the Natural Science Foundation of Heilongjiang Province, No. D201016

摘要:

背景:研究发现成骨细胞可促进牙槽骨的形成,而血小板衍生生长因子A因子转染成骨细胞对于牙槽骨形成的作用尚不清楚。
目的:将基因转染的血小板衍生生长因子A重组质粒与纳米羟基磷灰石复合移植到骨缺损处,观察其对骨缺损修复的影响。
方法:将24只新西兰大白兔随机分成实验组与对照组,制作双侧下颌下缘10 mm×6 mm×4 mm骨质缺损,实验组植入血小板衍生生长因子A转染成骨细胞与纳米羟基磷灰石的复合材料,对照组单纯植入纳米羟基磷灰石。术后4,8,12周取材行大体标本、锥形束CT、组织学观察及扫描电镜观察。
结果与结论:术后不同时间点,实验组缺损处新骨生成,成骨细胞、骨小梁、骨陷窝及新生血管修复情况,以及材料与牙槽骨连接处的骨结合均明显优于对照组(P < 0.05)。表明血小板衍生生长因子A转染成骨细胞与纳米羟基磷灰石复合生成的新型材料,有较好的生物相容性,可加速骨组织再生,促进骨组织缺损修复。

关键词: 生物材料, 纳米生物材料, 牙槽骨, 下颌骨缺损, 血小板衍生生长因子A因子转染成骨细胞, 复合材料, 纳米羟基磷灰石, 牙周炎, 省级基金

Abstract:

BACKGROUND: Studies have found that the osteoblasts can promote the formation of the alveolar bone, and platelet-derived growth factor A genetic modification effect on osteoblasts to promote alveolar bone  
formation is still unclear.
OBJECTIVE: To implant platelet-derived growth factor A recombinant plasmid and nano-hydroxyapatite composite into bone defects, and then to observe the effects on bone defect repair.
METHODS: Twenty-four New Zealand white rabbits were randomized into experimental and control groups. Bilateral mandibular defects of 10 mm×6 mm×4 mm were prepared. Platelet-derived growth factor A-transfected osteoblasts and nano-hydroxyapatite composite material was implanted into the experimental group, while nano-hydroxyapatite was implanted into the control group. Gross observation, cone beam CT, histological observation and scanning electron microscope observation were performed at postoperative 4, 8, and 12 weeks.
RESULTS AND CONCLUSION: At different time points after implantation, new bone formed at defect sites. Experimental group was superior to the control group in the following aspects: osteoblasts, trabecular bone, lacunae, neovascularization repair, as well as osseointegration between implant material and alveolar bone    (P < 0.05). These findings indicate that platelet-derived growth factor A transfected osteoblasts and nano-hydroxyapatite composite can generate a new material with better biocompatibility, which can accelerate the regeneration of bone tissue and promote bone defect repair.

Key words:  biomaterials, nanobimaterials, alveolar bone, mandibular defects, platelet-derived growth factor A-transfected osteoblasts, composite materials, nano-hydroxyapatite, periodontitis, provincial grants-supported paper

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