椎间盘退变的形态学分型中转化生长因子-β1表达的临床意义

Association of transforming growth factor-β1 with pathological grading of intervertebral disc degeneration

目的探讨退变椎间盘分型中转化生长因子(TGF-β1)表达的意义。方法收集正常与退变椎间盘组织,并根据病理改变把退变椎间盘组织分为Ⅳ级,采用HE染色,Western bloting和RT-PCR方法分析TGF-β1的表达情况。结果 HE染色、Westernbloting和RT-PCR均显示:在正常组织中TGF-β1有表达;在病变组织中并随病理分型增加TGF-β1随之增加,退变与正常组比较以及IV型与I型比较具有及显著差异(P<0.01)。结论 TGF-β1是引起椎间盘退变的重要原因,并且与病理的形态学分型密切相关。

Objective： To explore the role of transforming growth factor-β1 （TGF-β1） in intervertebral disc degeneration and its association with the pathological grading of disc degeneration. Methods Normal and degenerative intervertebral disc tissues were collected were classified into 5 grades of increasing degenerative changes. HE staining, immunohistochemistry, TUNEL staining and RT-PCR were used to detect the expression of TGF-β1 in the disc tissues. Results Immunohistochemistry and RT-PCR showed positive expressions of TGF-β1 and Bcl-2 in normal disc tissues, where Bax was expressed at have a trace level. In the degenerative disc tissues, TGF-β1 expression increased with the pathological grades; the expression levels of TGF-β1 showed significant differences between degenerative and normal tissues and between grade IV and grade I disc tissues （P〈 0.01）. Conclusion TGF-β1 is an important factor participating in the disc degeneration and its expression level is closely related to the pathological grade of degenerative discs.