轉(zhuǎn)錄因子AP-2α、E-鈣粘蛋白、MMP-9在重度子癇前期胎盤(pán)中的表達(dá)及意義
發(fā)布時(shí)間:2018-04-05 02:24
本文選題:重度子癇前期 切入點(diǎn):絨毛外滋養(yǎng)細(xì)胞(EVT) 出處:《河北醫(yī)科大學(xué)》2014年碩士論文
【摘要】:目的:重度子癇前期是一種妊娠期特有的嚴(yán)重危害母兒健康的疾病。以34周為界,將重度子癇前期分為早發(fā)型、晚發(fā)型。子癇前期發(fā)病機(jī)制尚不明確,,在眾多學(xué)說(shuō)中滋養(yǎng)層淺植入學(xué)說(shuō)得到廣泛認(rèn)可:絨毛外滋養(yǎng)細(xì)胞(extravillous trophoblasts,EVT)遷移和侵襲能力的降低導(dǎo)致子宮螺旋動(dòng)脈重塑障礙,形成缺陷胎盤(pán),引發(fā)子癇前期。轉(zhuǎn)錄因子激活蛋白-2(activator protein-2,AP-2)是一類(lèi)可調(diào)控細(xì)胞增殖、分化、胚胎發(fā)育的轉(zhuǎn)錄因子,在腫瘤細(xì)胞轉(zhuǎn)移表型的獲得上具有重要作用。研究報(bào)道AP-2α可通過(guò)轉(zhuǎn)錄調(diào)控E-鈣粘蛋白、金屬蛋白酶MMP-9的表達(dá)抑制腫瘤細(xì)胞的遷移、侵襲行為,這些蛋白均參與EVT的侵襲過(guò)程。目前AP-2α、E-鈣粘蛋白和MMP-9在子癇前期發(fā)病機(jī)制中的綜合作用尚未闡明,本研究旨在通過(guò)檢測(cè)早發(fā)型重度子癇前期組、晚發(fā)型重度癇前期組和正常妊娠組胎盤(pán)組織中AP-2α、E-鈣粘蛋白、MMP-9的蛋白表達(dá)變化,探討三者之間的關(guān)聯(lián)及其在重度子癇前期發(fā)病機(jī)制中的作用。 方法:選擇剖宮產(chǎn)分娩的孕婦60例,其中20例為早發(fā)型重度子癇前期組,20例為晚發(fā)型重度子癇前期組,20例同期住院分娩的孕晚期孕婦為正常妊娠組。角蛋白7用于鑒定蛻膜中的EVT,應(yīng)用免疫組織化學(xué)方法檢測(cè)AP-2α、E-鈣粘蛋白和MMP-9在絨毛滋養(yǎng)細(xì)胞和EVT中的表達(dá),并采用HSCORE評(píng)分對(duì)染色強(qiáng)度進(jìn)行半定量分析,應(yīng)用Western blot測(cè)定三組胎盤(pán)組織中AP-2α、E-鈣粘蛋白和MMP-9的蛋白表達(dá)量。采用SPSS16.0進(jìn)行統(tǒng)計(jì)學(xué)分析。 結(jié)果: 1臨床資料比較:三組孕婦年齡無(wú)統(tǒng)計(jì)學(xué)差異;早發(fā)型重度子癇組的孕齡明顯短于晚發(fā)型重度子癇前期及正常妊娠組,晚發(fā)組與正常組比較無(wú)顯著差異;三組的胎盤(pán)重量、新生兒出生體重,兩兩比較均有顯著差異。 2免疫組化結(jié)果顯示,底蛻膜中存在絨毛外滋養(yǎng)細(xì)胞。AP-2α主要表達(dá)于細(xì)胞核,E-鈣粘蛋白主要表達(dá)于細(xì)胞膜,MMP-9主要表達(dá)于細(xì)胞漿。在早發(fā)組、晚發(fā)組和正常組的EVT中:AP-2α的HSCORE評(píng)分分別為(2.28±0.39)、(1.86±0.37)、(1.48±0.29),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05);E-鈣粘蛋白的評(píng)分分別為(2.24±0.22)、(1.99±0.24)、(1.82±0.22),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05);MMP-9評(píng)分分別為(1.75±0.06)、(2.00±0.06)、(2.13±0.07),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05)。在早發(fā)組、晚發(fā)組和正常組的絨毛滋養(yǎng)細(xì)胞中:AP-2α的HSCORE評(píng)分分別為(3.02±0.06)、(2.05±0.05)、(1.49±0.06),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05);E-鈣粘蛋白的評(píng)分分別為(2.89±0.33)、(2.64±0.44)、(2.20±0.39),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05);MMP-9評(píng)分分別為(1.60±0.13)、(1.72±0.15)、(2.33±0.17),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05)。 3Western blot結(jié)果顯示:在早發(fā)組、晚發(fā)組和正常組胎盤(pán)組織中:AP-2α相對(duì)表達(dá)量分別為(0.79±0.06)、(0.66±0.08)、(0.53±0.10),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05);E-鈣粘蛋白相對(duì)表達(dá)量分別為(1.71±0.05)、(1.23±0.08)、(0.61±0.07),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05);MMP-9相對(duì)表達(dá)量分別為(0.18±0.03)、(0.22±0.04)、(0.25±0.05),兩兩比較差異均有統(tǒng)計(jì)學(xué)意義(P0.05)。相關(guān)性分析顯示:AP-2α表達(dá)量與E-鈣粘蛋白正相關(guān),與MMP-9負(fù)相關(guān)。 結(jié)論: 1與正常組比較,早發(fā)型和晚發(fā)型重度子癇前期組胎盤(pán)的絨毛滋養(yǎng)細(xì)胞及EVT中AP-2α、E-鈣粘蛋白表達(dá)均增加而MMP-9表達(dá)減少。說(shuō)明重度子癇前期患者的胎盤(pán)存在AP-2α、E-鈣粘蛋白和MMP-9表達(dá)異常,三者可能通過(guò)影響EVT侵襲能力,導(dǎo)致子宮螺旋動(dòng)脈重塑障礙參與重度子癇前期的發(fā)病過(guò)程。 2與晚發(fā)型重度子癇前期組比較,早發(fā)型重度子癇前期組胎盤(pán)的絨毛滋養(yǎng)細(xì)胞及EVT中AP-2α、E-鈣粘蛋白表達(dá)均增加而MMP-9表達(dá)減少。早發(fā)型、晚發(fā)型重度子癇前期可能均存在EVT侵襲力異常、子宮螺旋動(dòng)脈重塑障礙,但嚴(yán)重程度不同。 3AP-2α表達(dá)量與E-鈣粘蛋白正相關(guān),與MMP-9負(fù)相關(guān),推測(cè)AP-2α可能通過(guò)調(diào)節(jié)E-鈣粘蛋白與MMP-9的表達(dá)抑制EVT侵襲力,參與重度子癇前期的發(fā)病。 4重度子癇前期可能存在胎盤(pán)絨毛滋養(yǎng)細(xì)胞增殖、分化障礙。
[Abstract]:Objective: preeclampsia is a pregnancy specific disease seriously endangering the health of mother and fetus. In 34 weeks, will be divided into early onset severe preeclampsia and late onset preeclampsia. The pathogenesis is not clear, in many theories of shallow implantation theory has been widely recognized by trophoblast: extravillous trophoblast cells (extravillous trophoblasts, EVT) of uterine spiral artery remodeling leads to reduced barriers to migration and invasion, the formation of defects in the placenta, lead to pre eclampsia. Transcription factor activator protein -2 (activator protein-2 AP-2) is a kind of regulating cell proliferation, differentiation, embryonic transcription factor, which plays an important role in the migration of tumor cell phenotype. It was reported that AP-2 alpha can be through transcriptional regulation of E- cadherin, expression of metalloproteinase MMP-9 inhibits the migration and invasion of tumor cells, these proteins are involved in the invasion of EVT. At present, AP-2 alpha, E- cadherin and MMP-9 integrated role in the pathogenesis of preeclampsia has not been elucidated. This study was aimed to detect the early onset of severe preeclampsia group, AP-2 alpha, late onset severe preeclampsia group and normal pregnancy group in the placenta of E- cadherin, the expression of MMP-9 protein and explore the Association between the three and its role in the pathogenesis of severe preeclampsia.
Methods: 60 cases of cesarean section in pregnant women, including 20 cases of early onset severe preeclampsia group, 20 cases of late onset severe preeclampsia group, 20 cases of hospitalized primiparas'birth for normal pregnancy group. For the identification of keratin 7 in the decidua of EVT, immunohistochemical detection of AP-2 alpha, E- expression of E-cadherin and MMP-9 in trophoblast cells and EVT, and the HSCORE score of staining intensity of semi quantitative analysis of application of Western blot AP-2 was measured in placental tissues of the three groups, the expression of E- cadherin and MMP-9 proteins. Using SPSS16.0 for statistical analysis.
Result錛
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