中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (30): 5421-5426.doi: 10.3969/j.issn.2095-4344.2013.30.001

• 脊柱损伤基础实验 basic experiments of spinal injury •    下一篇

颈椎不稳对邻近节段椎间盘蛋白多糖及Ⅱ型胶原的影响

吴  彬,孟纯阳,王海滨,贾存岭,赵益峰   

  1. 济宁医学院附属医院骨科,山东省济宁市  272000
  • 收稿日期:2013-02-15 修回日期:2013-04-06 出版日期:2013-07-23 发布日期:2013-07-23
  • 作者简介:吴彬★,男,1980年生,山东省滕州市人,汉族,2006年泰山医学院毕业,硕士,主治医师,主要从事脊柱外科的研究 wb0902@163.com
  • 基金资助:

    济宁医学院青年基金支持(20090511),课题名称: 兔颈椎黄韧带叠压症动物模型建立及组织病理学研究。

Proteoglycan and collagen type Ⅱ in the adjacent intervertebral disc of the cervical instability models

Wu Bin, Meng Chun-yang, Wang Hai-bin, Jia Cun-ling, Zhao Yi-feng   

  1. Department of Orthopedics, Affiliated Hospital of Jining Medical University, Jining  272000, Shandong Province, China
  • Received:2013-02-15 Revised:2013-04-06 Online:2013-07-23 Published:2013-07-23
  • About author:Wu Bin★, Master, Attending physician, Department of Orthopedics, Affiliated Hospital of Jining Medical University, Jining 272000, Shandong Province, China wb0902@163.com
  • Supported by:

    Youth Foundation of Jining Medical University, No. 20090511

摘要:

背景:颈椎行减压融合内固定术后邻近节段椎间盘加速退变,单个节段不稳是否也会加速邻近节段椎间盘退变还不清楚。
目的:研究颈椎不稳动物模型邻近节段椎间盘形态学、蛋白多糖及Ⅱ型胶原的变化。
方法:16只新西兰大白兔,随机分为实验组及对照组,每组8只。实验组通过颈椎前路穿刺破坏纤维环及抽吸C5/6髓核组织建立兔颈椎不稳动物模型,12周X射线证实退变后处死动物取材,切取C4/5椎间盘组织,从矢状面切开,取其髓核组织10 mg,间苯三酚法测定髓核中蛋白多糖的量,另取椎间盘组织制作石蜡切片后进行苏木精-伊红染色和SABC免疫组化染色观察。
结果与结论:实验组C4/5椎间盘髓核脊索细胞减少,被成纤维细胞样细胞取代,偶见圆形的软骨细胞,且椎间盘纤维环变得粗糙,排列紊乱,玻璃样变性及色素沉着,可见纤维软骨细胞,内外层纤维环之间形成裂隙。髓核中蛋白多糖的含量降低,与对照组相比差异有显著性意义。退变椎间盘髓核及纤维环中Ⅱ型胶原也较对照组明显减少。结果表明颈椎不稳可诱发邻近节段颈椎退变,表现为椎间盘发生形态学变化,蛋白多糖、Ⅱ型胶原含量下降。

关键词: 骨关节植入物, 脊柱损伤基础实验, 颈椎不稳, 蛋白多糖, Ⅱ型胶原, 临近节段, 颈椎退变, 颈椎间盘, 髓核, 纤维环, 其他基金

Abstract:

BACKGROUND: Cervical decompression and fusion internal fixation will accelerate adjacent segment disc degeneration, and it is not clear whether single segment instaibility can increase the adjacent segment disc degeneration.
OBJECTIVE: To study the changes of morphology, proteoglycan and collagen type Ⅱ in the adjacent intervertebral disc of the cervical instability models.
METHODS: Sixteen New Zealand white rabbits were divided into two groups randomly, with eight rabbits in the control group and eight rabbits in the model group. The animal cervical instability models were made by destroyed partly annulus fibrosus and absorbed C5/6 nucleus pulposus through anterior cervical puncture. After 12 weeks, the animal models were tested by X-ray film. All rabbits were sacrificed and 10 mg nucleus pulposus of the intervertebral discs of C4/5 cut from sagittal plane were harvested and stored under 0 ℃. The content of proteoglycan in nucleus pulposus was tested with phloroglucinol method. Then, the paraffin sections of intervertebral disc tissues were taken for hematoxylin-eosin staining and SABC immunohistochemical staining. 
RESULTS AND CONCLUSION: The notochord cells of C4/5 intervertebral discs in the experimental group was decreased, and being replaced by fibroblast-like cells. Round chondrocytes could be seen occasionally and intervertebral discs annulus fibrosus became rough and arranged disorderly, the hyaline degeneration and pigmentation were observed as well as the fibrochondrocytes, and there was a gap between inner and outer annulus fibrosus. The content of proteoglycan was decreased in the nucleus pulposus, and there was significant difference between two groups. The collagen type Ⅱ in the degenerative disc nucleus pulposus and annulus fibrosus of the experimental group was lower than that of the control group. Cervical instability can lead to adjacent intervertebral disc degeneration with the morphological changes and decreased content of proteoglycan and collagen type Ⅱ.

Key words: bone and joint implants, basic experiment of spinal cord injury, cervical instability, proteoglycan, collagen type Ⅱ, adjacent segment, cervical degeneration, cervical disc, nucleus pulposus, annulus fibrosus, other grants-supported paper

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