中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (2): 244-248.doi: 10.3969/j.issn.2095-4344.2017.02.015

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials • 上一篇    下一篇

壳聚糖/羟基磷灰石骨复合支架修复关节软骨损伤

刘洪亚
  

  1. 山东医学高等专科学校附属医院骨科,山东省临沂市  276002
  • 收稿日期:2016-11-16 出版日期:2017-01-18 发布日期:2017-02-27
  • 作者简介:刘洪亚,男,1979年生,江苏省徐州市人,汉族,2012年延边大学毕业,硕士,主治医师,主要从事骨关节损伤治疗研究。

Chitosan/hydroxyapatite composite scaffolds for articular cartilage injury

Liu Hong-ya
  

  1. Department of Nephrology, Affiliated Hospital of Shandong Medical College, Linfen 276002, Shandong Province, China
  • Received:2016-11-16 Online:2017-01-18 Published:2017-02-27
  • About author:Liu Hong-ya, Master, Attending physician, Department of Nephrology, Affiliated Hospital of Shandong Medical College, Linfen 276002, Shandong Province, China

摘要:

文章快速阅读:

 

文题释义:
壳聚糖
:是人体中相对比较少见的一种碱性多糖,它是甲壳素的脱乙酰化产物,在自然界中储量较丰富,价格廉价,具有良好的生物相容性,能够有效促进细胞增殖和黏附。同时,壳聚糖本身的生物性能也能够促进伤口愈合,是骨组织修复的理想材料。
羟基磷灰石:是脊椎动物骨骼和牙齿的主要无机组成成分,人的牙釉质中羟基磷灰石的含量约96%,骨头中也约占到69%。羟基磷灰石具有优良的生物相容性和生物活性,并可作为一种骨骼或牙齿的诱导因子,在口腔保健领域中对牙齿具有较好的再矿化、脱敏以及美白作用。

背景:壳聚糖/羟基磷灰石复合支架在结构上与天然骨十分类似,具有良好的生物学性能,能够发挥不同材料的性能。
目的:观察壳聚糖/羟基磷灰石复合支架修复关节软骨损伤的效果。
方法:取30只新西兰大白兔,制作左侧膝关节软骨缺损模型,随机分2组,实验组与软骨缺损处置入壳聚糖/羟基磷灰石复合支架,对照组置入透明质酸钠凝胶。置入后4,8,12周,取软骨损伤组织进行组织学观察。
结果与结论:①组织学Wakitani与Mankin评分:实验组置入后4,8,12周Wakitani评分显著高于对照组(P < 0.05),置入4,12周的Mankin评分显著低于对照组(P < 0.05);②番红-O染色:置入后4周,对照组软骨细胞表面存在明显的褶皱状小突起,细胞相对不规则;实验组软骨细胞表面存在轻微的褶皱状小突起,细胞核略大,排列相对有序。置入后8周,对照组软骨细胞表面存在褶皱状小突起,细胞排列欠规则;实验组软骨细胞表面存在褶皱状小突起,细胞核较大,排列规则;置入后12周,对照组软骨细胞表面存在褶皱状小突起,细胞核变大,排列基本有序;实验组软骨细胞表面无褶皱状小突起;细胞核变大,排列规则;③结果表明:壳聚糖/羟基磷灰石复合支架可促进关节软骨损伤的修复。

关键词: 生物材料, 软骨生物材料, 壳聚糖, 羟基磷灰石, 复合支架, 运动型关节软骨损伤

Abstract:

BACKGROUND: Studies have shown that the chitosan/hydroxyapatite composite scaffold with good biological performance is very similar to natural bone in structure, and plays the performance of different materials.
OBJECTIVE: To observe the repairing effect of chitosan/hydroxyapatite composite scaffold on articular cartilage injury.
METHODS: Thirty New Zealand white rabbits were selected to make articular cartilage injury on the left knee, and then model rabbits were randomly divided into sodium hyaluronate gel group (control group, n=15) and chitosan/hydroxyapatite composite scaffold group (experimental group, n=15). At 4, 8, 12 weeks after scaffold implantation, cartilage tissues were taken out and observed histologically.
RESULTS AND CONCLUSION: Compared with the control group, the experimental group showed higher Wakitani scores at 4, 8, 12 weeks, but lower Mankin scores at 4 and 12 weeks after implantation (both P < 0.05). Safranin-O staining results showed that at 4 weeks after implantation, chondrocytes arranged relatively in disorder with overt pleated small projections in the control group, while chondrocytes were well aligned with slightly pleated small projections and slightly large nuclei in the experimental group; at 8 weeks, chondrocytes arranged irregularly with pleated small projections in the control group, while in the experimental group, the chondrocytes arranged orderly with pleated small projections and large nuclei; at 12 weeks, the chondrocytes in the control group exhibited a substantially ordered arrangement with pleated small projections and large nuclei, while in the experimental group, the chondrocytes arranged in order with no pleated small projections but with large nuclei. All these findings indicate that chitosan/hydroxyapatite composite scaffold can promote articular cartilage repair.

Key words: Hydroxyapatites, Chitosan, Tissue Engineering

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