大鼠退变颈椎间盘组织基因表达谱的研究

Gene expression pattern of cervical intervertebral disc degeneration in rats

目的 :研究正常和退变模型大鼠颈椎间盘的基因表达谱 ,分析大鼠颈椎间盘基因表达水平的变化 ,用于指导诊断和治疗。 方法 :建立动静力失衡性大鼠颈椎间盘退变模型 ,从造模后 5个月对照组和模型组大鼠颈椎间盘中抽提 m RNA ,经逆转录分别用 cy3、cy5荧光标记 ,获得两组动物椎间盘 c DNA的探针 ,再与 5 12 c DNA基因表达谱芯片杂交 ,结果由激光扫描仪扫描并用软件进行图像分析、标准化处理、ratio值分析、聚类分析。结果 :共筛选出 18条表达有差异的基因 ,11条基因表达量明显下降 (ratio<0 .4 ) ,其中细胞信号转导类有 4条 ;7条基因表达量明显上升 (ratio>2 .5 )。这些基因在颈椎间盘退变的表达模式与其他的报道类似。 结论 :退变大鼠椎间盘基因表达的调节发生变化 。

Objective: To investigate the gene expresssion changes in normal and degeneration cervical intervertebral disc in rats, providing information for clinical diagnosis and treatment of cervical intervertebral disease.Methods: The models of cervical intervertebral disc degeneration in rats caused by imbalance between the dynamic and static forces was established.cDNA microarray chips containing 512 cDNAs were used to investigate the gene expression pattern in cervical intervertebral disc of rat.The results were scanned and analyzed by computer image analysis,and then subjected to standardization,ratio and clustering analysis.Results: Eighteen genes expressed in cervical intervertebral disc were screened out,comprising 11 up regulated and 7 down regulated ones,respectively.This genes expression in cervical spondylosis was similar to other reports.Conclusion: Signal transduction pathways plays an important role in the process of cervical intervertebral disc degeneration.Investigation on the gene expression pattern is helpful for studying degeneration of cervical intervertebral disc pathogenesis.