中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (11): 1699-1706.doi: 10.3969/j.issn.2095-4344.2015.11.012

• 骨组织构建 bone tissue construction • 上一篇    下一篇

2型糖尿病大鼠骨痂内Osx、Dlx5表达变化与骨折愈合

刘振东,蔡 绪,王魁向,张远军,刘志涛   

  1. 中南大学湘雅三医院骨科,湖南省长沙市 410013
  • 修回日期:2015-01-24 出版日期:2015-03-12 发布日期:2015-03-12
  • 通讯作者: 王魁向,硕士,医师,中南大学湘雅三医院骨科,湖南省长沙市 410013
  • 作者简介:刘振东,男,1959年生,湖南省长沙市人,汉族,中南大学湘雅医学院大学毕业(原湖南医科大学),博士,副主任医师,主要从事创伤骨科、代谢性骨病研究。
  • 基金资助:

    湖南省自然科学基金(14JJ7018)

The relationship between the change of Osx and Dlx5 expressed in the callus and fracture healing in type 2 diabetes rats

Liu Zhen-dong, Cai Xu, Wang Kui-xiang, Zhang Yuan-jun, Liu Zhi-tao   

  1. Department of Orthopedics, the Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
  • Revised:2015-01-24 Online:2015-03-12 Published:2015-03-12
  • Contact: Wang Kui-xiang, Master, Physician, Department of Orthopedics, the Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
  • About author:Liu Zhen-dong, M.D., Associate chief physician, Department of Orthopedics, the Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
  • Supported by:

    the Natural Science Foundation of Hunan Province, No. 14JJ7018

摘要:

背景:研究表明Osx、Dlx5等基因的表达水平与骨折愈合障碍可能存在一定关系。

目的:分析2型糖尿病大鼠牵引骨痂中Osx、Dlx5表达变化与骨折愈合障碍的关系。
方法:选择8周龄SD大鼠32只,随机分为2组,实验组(18只)高糖高脂饲料喂养8周,链脲佐菌素腹腔注射制作2型糖尿病大鼠模型;对照组喂普通大鼠饲料予以同样剂量柠檬酸腹腔注射。2组大鼠同时建立骨折牵引模型,定期延长外固定架,牵引模型建立后15 d处死大鼠并收集血液标本检测生化指标,X射线观察骨痂生长情况,取左胫骨骨痂组织进行组织学观察,检测骨痂组织中Dlx5、Osx蛋白及相关基因的表达。

结果与结论:X射线摄片结果:实验组牵引骨痂较对照组明显减少,骨痂组织苏木精-伊红染色显示:实验组较对照组的微骨柱明显减少;初始基质前沿浅染。而骨痂的组织学定量分析则显示:实验组新生骨痂的形成面积较对照组减少而骨折近端脂肪细胞数量增多(P < 0.01)。QPCR检测则显示:实验组较对照组骨痂组织中Osx表达降低(P < 0.05),Dlx5表达降低(P < 0.05)。结果提示,2型糖尿病大鼠骨折愈合较正常大鼠明显减慢,可能与2型糖尿病Osx、Dlx5表达降低具有相关性。



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 骨组织构建, 骨折愈合, 2型糖尿病, Osx, Dlx5, 骨痂, 湖南省自然科学基金

Abstract:

BACKGROUND: Experiments have shown that the expression levels of Osx and Dlx5 may have some relationships with fracture healing disorder.

OBJECTIVE: To probe into the relationship between the change of expression of Osx and Dlx5 in the callus of type 2 diabetes rats and fracture healing disorder.
METHODS: We selected 32 Sprague-Dawley rats with proper weight in 8 weeks age. They were randomly assigned into two groups: the experimental group (n=18) was fed with high fat and sugar diet for 8 weeks, and then received intraperitoneal injection of streptozotocin to induce diabetic models; the control group was fed with normal diet and received intraperitoneal injection of the same dose of citric acid. Two weeks later, all the rats were used to establish left tibia traction fracture models with orthopedic external fixator. We extended the external fixator at a proper length per day. The animals were sacrificed at 15 days after establishment of traction fracture models. The blood specimens were evaluated for biochemical detection. X-ray was used to observe the growth of callus. The callus tissues from the left tibia were taken for histological observation and the expression of Dlx5 and Osx in the callus was detected.
RESULTS AND CONCLUSION: X-ray results showed that the amount of callus tissues in the experimental group was significantly reduced. The hematoxylin-eosin staining of the callus tissue revealed that the microcolumn formation in the experimental group was significantly reduced compared with the control group; the area of primary matrixfront was lightly colored. The callus histological quantitative analysis showed that in the experimental group the area of new callus decreased and more adipose cells presented in the proximal fracture end compared with the control group (P < 0.01). QPCR displayed that the expression of Osx and Dlx5 was lower in the experimental group than the control group (P < 0.05). These findings indicate that the poorer fracture healing in type 2 diabetes than the normal rats may be associated with the decrease of Osx and Dlx5 expression.


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: Diabetes Mellitus, Type 2, Bony Callus, Fracture Healing

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