中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (32): 5128-5133.doi: 10.3969/j.issn.2095-4344.2017.32.008

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

脊髓半横断损伤对大鼠骨折愈合的影响

陈齐勇,林  煜,梁硅清,刘伯龄   

  1. (厦门大学附属福州第二医院骨科,福建省福州市  350007)
  • 收稿日期:2017-07-23 出版日期:2017-11-18 发布日期:2017-11-15
  • 作者简介:陈齐勇,男,1980年生,福建省福清市人,汉族,2006年福建医科大学毕业,硕士,主治医师,主要从事脊柱外科临床与基础研究。
  • 基金资助:

    国家自然科学基金(81302986);福州市科技计划项目(2013-s-123-12)

Effect of spinal cord hemisection on bone fracture healing in rats

Chen Qi-yong, Lin Yu, Liang Gui-qing, Liu Bo-ling   

  1.  (Department of Orthopedics, Fuzhou No. 2 Hospital Affiliated to Xiamen University, Fuzhou 350007, Fujian Province, China)
  • Received:2017-07-23 Online:2017-11-18 Published:2017-11-15
  • About author:Chen Qi-yong, Master, Attending physician, Department of Orthopedics, Fuzhou No. 2 Hospital Affiliated to Xiamen University, Fuzhou 350007, Fujian Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81302986; the Fuzhou Science and Technology Project, No. 2013-s-123-12

摘要:

文章快速阅读:


文题释义:
脊髓半横断损伤:双侧肢体神经通路完整性不同,临床表现为Brown Sequard综合征,病损平面以下患侧肢体上运动神经元瘫痪,深感觉消失,精细触觉障碍,血管舒缩运动障碍,对侧肢体痛温觉消失,而触觉保留。
降钙素基因相关肽:是广泛分布于神经系统的一种神经肽,其在外周及脊髓参与伤害性信息的传递及痛敏化的形成,并与P物质、兴奋性氨基酸、辣椒素1型受体、趋化因子、激活素、大麻素受体、阿片受体、神经生长因子、血管活性肠肽、5-羟色胺、糖皮质激素等生物活性物质或受体在痛觉调制过程中存在相互影响。它是一种具有强大舒血管作用和神经细胞保护作用的调节肽,对心脏具有正性变时、变力作用。1983年由Rosenfeld等应用分子生物学技术发现,由37个氨基酸组成。在体内主要分布于神经系统,亦广泛分布于心血管系统和肺组织内。在心脏,主要存在于心房、心室、室间隔、窦房结、乳头肌和冠状动脉壁的神经纤维内。
摘要
背景:
研究证明,神经系统显著影响骨折的愈合过程,神经不同层面、不同成分对骨痂影响各不相同。
目的:制备脊髓半横断损伤并骨折的大鼠模型,观察神经完整性不同的骨折,愈合时骨痂量的不同和组织形态学变化,探讨其对骨痂生成的影响。
方法:雄性SD大鼠48只,分2组,制备单纯骨折模型及脊髓半横断损伤并骨折模型,切断右半侧脊髓。于术后14,28 d分批取材,取胫骨,称量湿质量,X射线观察骨折愈合情况,苏木精-伊红染色观察骨痂组织形态变化,qPCR SYBR GREEN法检测骨折断端骨组织降钙素基因相关肽、骨形态发生蛋白2 mRNA的表达。
结果与结论:①脊髓半横断损伤并骨折组,对侧胫骨湿质量大于患侧(P < 0.05),均大于单纯骨折组(P < 0.05);②X射线显示脊髓半横断损伤并骨折,对侧骨痂最大,患侧次之,单纯骨折骨痂最小;③苏木精-伊红染色显示,28 d脊髓半横断损伤并骨折组,对侧细胞排列紊乱;患侧纤维骨痂为主,细胞排列较规则;单纯骨折,骨性骨痂为主,细胞排列规则。④qPCR SYBR GREEN法结果显示,单纯骨折组降钙素基因相关肽、骨形态发生蛋白2表达较脊髓半横断损伤并骨折组高(P < 0.05);⑤结果提示,完整神经支配是骨折愈合的必须因素。

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
ORCID: 0000-0001-6894-7290(陈齐勇)

关键词: 组织构建, 骨组织工程, 神经损伤, 胫骨骨折, 骨痂, 国家自然科学基金

Abstract:

BACKGROUND: The nervous system has been proved to play an important role in fracture healing, and differentnervous components exert different effects on bony callus.
OBJECTIVE: To observe the callus volume and morphological changes in the fracture healing progress of the rats with spinal cord hemisection and fracture.
METHODS: Forty-eight male Sprague-Dawley rats were divided into two groups, and the models of simple fracture and spinal cord hemisection by cutting the right spinal cord combined with fracture were established. The tibia was removed at 14 and 28 days after surgery, and the wet weight was measured, the fracture healing was observed by X-ray examination, morphological changes of the callus were observed through hematoxylin-eosin staining, and the expression level of calcitonin gene-related peptide mRNA in the broken bones was detected by SYBR Green qPCR.
RESULTS AND CONCLUSION: In the combination group, the wet weight of the contralateral tibia was more than that of the affected side (P < 0.05), which both were more than those in the simple group (P < 0.05). X-ray findings showed that the combination group had the largest lateral callus, followed by the affected side, and the smallest in the simple group. Hematoxylin-eosin staining showed that in the combination group, the contralateral cells arranged in disorder, while the fibrous callus and cells in regular arrangement were found in the affected side; there were bony callus and cells in regular arrangement in the simple group at 28 days after surgery. SYBR Green qPCR results revealed that the expression level of calcitonin gene-related peptide mRNA in the simple group was significantly higher than that in the combination group (P < 0.05). To conclude, complete innervation is a necessary factor for fracture healing.

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

Key words: Spinal Cord Injuries, Fractures, Bone, Bony Callus, Tissue Engineering

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