張小紅 劉志紅 洪莉


【摘要】目的:檢測盆腔器官脫垂(POP)患者子宮骶韌帶組織中轉(zhuǎn)化生長因子-β1(TGF-β1)、基質(zhì)金屬蛋白酶-2(MMP-2)、基質(zhì)金屬蛋白酶組織抑制因子-2(TIMP-2)蛋白的表達(dá);分析TGF-β1、MMP-2、TIMP-2各變量之間的相關(guān)性;闡明氧化應(yīng)激可能是POP的發(fā)生發(fā)展的誘導(dǎo)因素。方法:Western blot檢測POP和非POP正?;颊咦訉m骶韌帶組織中TGF-β1、MMP-2、TIMP-2蛋白的表達(dá)。分析TGF-β1、MMP-2、TIMP-2各變量之間的相關(guān)性。結(jié)果:Western blot技術(shù)檢測結(jié)果顯示,與非POP正常組相比,POP組子宮骶韌帶組織中 TGF-β1及 TIMP-2蛋白表達(dá)水平下降,而MMP-2蛋白表達(dá)水平增加,使得MMP-2/TIMP-2比值增大,上述差異有統(tǒng)計(jì)學(xué)意義(P<0.01)。變量間相關(guān)性分析結(jié)果:POP組組織中TGF-β1 蛋白表達(dá)與MMP-2蛋白表達(dá)呈負(fù)相關(guān),(r=-0.463, P<0.05),而TGF-β1 蛋白表達(dá)與TIMP-2蛋白表達(dá)之間呈正相關(guān),相關(guān)具有統(tǒng)計(jì)學(xué)意義(r=0.743 ,P<0.05);而非POP正常組組織中TGF-β1 蛋白表達(dá)與MMP-2及 TIMP-2蛋白表達(dá)均無顯著相關(guān)性(r=0.183, P>0.05;r=0.342, P>0.05)。結(jié)論:TGF-β1、MMP-2、TIMP-2可能通過機(jī)械力誘發(fā)的氧化應(yīng)激反應(yīng)對盆底組織的刺激作用;而TGF-β1在氧化應(yīng)激中有保護(hù)作用。
【關(guān)鍵詞】氧化應(yīng)激;盆腔器官脫垂;轉(zhuǎn)化生長因子-β1;基質(zhì)金屬蛋白酶-2;基質(zhì)金屬蛋白酶組織抑制因子-2
Correlation of TGF-β1, MMP-2 and TIMP-2 and pelvic organ prolapseZHANG Xiaohong1, LIU Zhihong1, HONG Li2△. 1.Department of Obstetrics and Gynecology, Hanchuan Peoples Hospital, Xiaogan 431600, Hubei, China; 2.Department of GynecologyⅡ, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
【Abstract】Objectives: To explore the effect of oxidative stress on the pathophysiology of pelvic organ prolapsed (POP). Methods: The expression levels of transforming growth factor-β1 (TGF-β1), matrix metalloproteinase-2 (MMP-2) and tissue inhibitors of metalloproteinase-2 (TIMP-2) of the samples were assessed by western blot analysis. Results: As revealed by western blot analysis, the expression levels of TGF-β1 and TIMP-2 were lower, while the MMP-2 expression was much higher in cardinal ligaments of POP group as compared with the control group, thus increasing the ratio of MMP-2/TIMP-2, with statistically significant differences (P<0.1). The levels of TGF-β1 were negatively correlated with those of MMP-2 in POP group (r = - 0.463, P<0.05); the levels of TGF-β1 were positively correlated with those of TIMP-2 in POP group (r = 0.743, P<0.05); the three factors in controls showed no positive correlation (r = 0.183, P> 0.05; r = 0.342, P> 0.05). Conclusion: Oxidative stress may be concerned with the pathophysiology of POPby influencing the expression levels of TGF-β1, MMP-2 and TIMP-2, thus regulating the balance of MMP-2 and TIPM-2 in the fibroblasts of cardinal ligaments.
【Key words】Oxidative stress; Pelvic organ prolapse (POP); Transforming growth factor-β1 (TGF-β1); Matrix metalloproteinase-2 (MMP-2); Tissue inhibitors of metalloproteinase-2 (TIMP-2)
【中圖分類號】R711.74【文獻(xiàn)標(biāo)志碼】A
盆腔器官脫垂( pelvic organ prolapse, POP) 是由于盆底支持結(jié)構(gòu)組織松弛或損傷致使盆腔臟器下垂,主要表現(xiàn)為陰道的前、后壁膨出、陰道穹窿脫垂或子宮脫出[1]。轉(zhuǎn)化生長因子-β1(transforming growth factor-1,TGF-β1)是細(xì)胞外基質(zhì)(extra cellularmatrix,ECM)的一種生物活性分子,與膠原代謝關(guān)系密切的細(xì)胞因子?;|(zhì)金屬蛋白酶(matrix metalloproteinases,MMPs)可降解膠原,基質(zhì)金屬蛋白酶組織抑制物(tissue inhibitors of metalloproteinases,TIMPs)可特異性與MMPs結(jié)合,抑制膠原降解。研究證實(shí)[2-6]機(jī)體在氧化損傷中產(chǎn)生ROS能夠調(diào)節(jié)轉(zhuǎn)化生長因子-β1,既可使成纖維細(xì)胞大量合成、分泌膠原蛋白,又可抑制ECM降解酶分泌,促進(jìn)降解酶抑制劑的合成等方式調(diào)節(jié)ECM的代謝?;|(zhì)金屬蛋白酶抑制劑證實(shí)在氧化應(yīng)激抗氧化的過程中是重要的抗氧化的蛋白酶抑制劑[7-9]。目前……