锌转运体ZIP10过表达对乳腺癌细胞侵袭能力的影响

目的:将ZIP10基因真核表达载体转染乳腺癌细胞MDA-MB-231和MCF-7细胞,研究ZIP10过表达对乳腺癌细胞侵袭能力的影响.方法:经双酶切后凝胶电泳鉴定ZIP10基因表达载体pEGFP-N1-ZIP10,利用脂质体转染法将pEGFP-N1-ZIP10及其相应空载体分别转染乳腺癌细胞MDA-MB-231(ER-)及MCF-7(ER+).RT-PCR检测乳腺癌细胞中MMP-2、MMP-9的mRNA水平,Western blot技术检测细胞中ZIP10蛋白质的表达水平,MTT法观察转染pEGFP-N1-ZIP10前后乳腺癌细胞增殖活性,Transwell实验观察转染pEGFP-N1-ZIP10前后乳腺癌细胞侵袭能力的改变.结果:乳腺癌MCF-7和MDA-MB-231细胞瞬时转染成功后,MMP-2、MMP-9的mRNA 水平没有显著差异,MTT检测结果显示,pEGFP-N1-ZIP10转染乳腺癌细胞后对其增殖活性没有明显影响;Transwell肿瘤细胞侵袭实验显示,ZIP10过表达可显著增加乳腺癌细胞的侵袭能力.结论:ZIP10真核表达载体转染乳腺癌细胞系MCF-7和MDA-MB-231使ZIP10过表达,对细胞增殖活性没有明显影响,但可明显增加肿瘤细胞的侵袭能力.     

跨膜型肿瘤坏死因子-α胞内段基序稳定表达细胞株的建立及功能研究

目的 建立高表达跨膜型肿瘤坏死因子-α胞内段(TNF-intracellular domain,TNF-ICD)基序的人乳腺癌MCF-7细胞株,为研究TM-TNF-α的反向信号提供工具.方法 采用脂质体介入法将含人TNF-ICD的pIRES2-EGFP病毒载体导入MCF-7中,经鉴定、筛选获得能稳定表达TNF-ICD细胞株.采用MTT法检测转染细胞对TNF-α的敏感度,比色法检测NO含量,ELISA方法 检测NF-κB的活性.结果 TNF-ICD基因转染入MCF-7细胞后表达在细胞膜上,并能提高该细胞NF-κB活性,抵抗TNF-α的杀伤,增加其NO产生;应用NF-κB抑制剂PDTC处理后能恢复该细胞对TNF的敏感性.结论 获得稳定表达TNF-ICD的MCF-7细胞株,TNF-ICD可能作为TM-TNF-α细胞内的一段活化基序参与TM-TNF-α的反向信号,并通过活化NF-κB,抵抗可溶性TNF-α介导的细胞毒作用,增加NO的产生.     

CNTN-1促进人食管癌EC9706细胞侵袭和迁移

目的探讨接触蛋白-1(CNTN-1)在食管癌转移中的作用。方法 q PCR和Western blot检测食管癌细胞系EC9706中CNTN-1的表达;RNA干扰和CNTN-1过表达质粒转染调整EC9706细胞CNTN-1的表达,并将细胞分为空白对照组、scrambled siRNA组、CNTN-1 siRNA组、pcDNA3.1-vector组和pcDNA3.1-CNTN-1组;Brd U和Transwell实验分别检测EC9706细胞增殖、侵袭和迁移能力;qPCR和Western blot检测基质金属蛋白酶MMP-2和MMP-9的表达。结果 CNTN-1在食管癌细胞EC9706中mRNA和蛋白水平较与正常食管上皮细胞显著上调(P0.05);转染CNTN-1siRNA后,EC9706细胞CNTN-1表达水平显著降低(P0.05),细胞增殖、侵袭和迁移能力显著下降(P0.05),同时细胞中侵袭转移相关蛋白MMP-2和MMP-9表达明显下降(P0.05);CNTN-1过表达质粒转染细胞后,EC9706细胞内CNTN-1表达水平上调(P0.05),细胞增殖、迁移和侵袭能力显著升高,同时MMP-2和MMP-9表达明显升高(P0.05)。结论 CNTN-1可能通过调节MMP-2和MMP-9表达促进食管癌细胞的侵袭转移。     

ADAM15、MMP-2和MMP-9在不同转移能力乳腺癌细胞系中的表达差异

目的分析ADAM15、MMP-2和MMP-9在不同转移能力乳腺癌细胞系中的表达,探讨其与乳腺癌细胞转移的相关性。方法 Transwell小室实验检测两种乳腺癌细胞系的转移能力,免疫细胞化学法对ADAM15、MMP-2及MMP-9在两种细胞中的表达进行定性、定位及半定量检测,Western blot对其进行定量检测。结果 MDA-MB-231乳腺癌细胞系的运动和侵袭能力均强于MCF-7乳腺癌细胞系。ADAM15、MMP-2及MMP-9在MDA-MB-231细胞系中的表达分别高于MCF-7细胞系(免疫细胞化学:P0.001,P0.05,P0.001;Western blot:P0.01,P0.05,P0.01),且三者在两系乳腺癌细胞表达的差异中,ADAM15表达的差异性最大,其次为MMP-9,MMP-2的差异性最小。结论 ADAM15、MMP-2及MMP-9均促进乳腺癌转移,且ADAM15与转移相关性最强而可能成为判断乳腺癌恶性生物学行为的指标。     

下调血管内皮生长因子-C基因表达对乳腺癌MCF-7细胞侵袭抑制作用的研究

目的 探讨下调乳腺癌MCF-7细胞中血管内皮生长因子(VEGF)-C基因的表达后对乳腺癌细胞侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株.荧光定量PCR及Western印迹检测转染后对乳腺癌MCF-7细胞VEGF-C mRNA和蛋白质水平的影响.Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的侵袭能力.RT-PCR检测转染前后乳腺癌MCF-7细胞中MMP-2、-9 mRNA表达变化.结果 转染后获得稳定表达的细胞株.转染后的乳腺癌MCF-7细胞VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05).Transwell体外侵袭实验显示,转染后重组质粒组与阴性质粒相比,穿膜数明显减少(29.0±1.9比59.0±2.1,P<0.05).RT-PCR显示,转染后乳腺癌细胞的MMP-2、-9 mRNA表达均明显受抑制,抑制率分别为55%、75%(P<0.05).结论 下调VEGF-C表达对乳腺癌MCF-7细胞的侵袭能力有显著抑制作用.     

KISS-1及MMP-9基因在胃癌侵袭转移中的作用及相关性

目的探讨肿瘤转移抑制基因KISS-1在胃癌侵袭、转移中的作用及其与MMP-9表达的关系。方法采用Lipofectamine脂质体介导将pcDNA3.1-KISS-1真核表达质粒转染胃癌BGC-823细胞,经G418筛选,建立稳定高表达KISS-1蛋白的细胞系,通过RT-PCR和Western blotting法证实转染成功,并检测细胞中MMP-9蛋白及mRNA的表达情况;采用Transwell体外侵袭实验,探讨KISS-1对胃癌细胞株侵袭能力的影响。结果 Western blotting和RT-PCR结果显示:转基因组BGC-823细胞中KISS-1蛋白及mRNA的表达与转空质粒组和对照组相比均明显增加(P均<0.05);转基因组BGC-823细胞中MMP-9蛋白及mR-NA的表达与转空质粒组和对照组相比均明显降低(P均<0.05);Transwell检测结果显示:转基因组BGC-823细胞的穿膜数与转空质粒和对照组相比均明显降低(P<0.05),侵袭力抑制率达到25%。结论 pcDNA3.1-KISS-1的有效转染可降低MMP-9的表达并对胃癌细胞BGC-823的侵袭能力具有抑制作用。KISS-1基因对胃癌侵袭转移的抑制作用可能是通过下调MMP-9的功能实现的。     

RNA干扰抑制MTA1基因对人乳腺癌细胞ERα表达及浸润能力的影响

目的 通过观察pGenesil-1肿瘤转移相关基因1(MTA1)对人乳腺癌细胞株MDA-MB-231和MCF-7细胞MTA1基因的沉默效应,了解其对ERα表达及浸润能力的影响.方法 设计合成并构建重组质粒pGenesil-1MTA1,将该质粒分别转染MDA-MB-231和MCF-7细胞,荧光显微镜评估转染效率,RT-PCR检测MTA1和基质金属蛋白酶(MMP)-9 mRNA表达,免疫细胞化学检测ERα和MMP-9表达,Western blot检测ERα蛋白表达,用Boyden小室体外侵袭实验检测转染前后两株细胞侵袭力的变化.结果 成功构建重组质粒pGenesil-1MTA1,并成功转染入MDA-MB-231和MCF-7细胞(平均转染效率分别为82.5%和78.2%).两株细胞MTA1 mRNA表达均受到不同程度的抑制(分别为80.2%和58.7%).经干扰MTA1基因后MDA-MB-231细胞ERα蛋白表达得到逆转,呈阳性表达;MMP-9 mRNA表达下降;细胞体外侵袭力减弱(侵袭指数为27.2%±2.1%),与干扰前(76.3%±2.4%)相比差异有统计学意义(P＜0.05).而MCF-7细胞转染重组质粒并干扰MTA1基因后,ERα蛋白、MMP-9 mRNA表达和体外侵袭能力变化均无统计学意义(P＞0.05).结论 重组质粒pGenesil-1MTA1能有效抑制人乳腺癌细胞株MDA-MB-231和MCF-7细胞MTA1基因表达,ERa在MDA-MB-231细胞得到逆转,表达阳性,其高侵袭能力减弱,使干扰肿瘤转移靶基因成为可能.     

miR-143靶向调控ER-α36影响胃癌细胞系SGC7901的侵袭

目的探讨miR-143通过靶向雌激素受体ER-α36介导人胃癌细胞系SGC7901的侵袭。方法通过慢病毒载体的构建及包装生成上调/下调miR-143的慢病毒LV-miR-143 up和LV-miR-143 down并感染人胃癌细胞系SGC7901,用Western blot检测ER-α36的蛋白表达水平和细胞的侵袭能力;生物信息学软件预测miR-143的靶基因;荧光素酶报告基因实验验证靶基因。结果 LV-miR-143 up与LV-miR-143 down慢病毒病毒颗粒分别感染人胃癌细胞系SGC7901,感染效率均在80%以上;上调miR-143,人胃癌细胞系SGC7901的ER-α36表达水平明显下降,侵袭能力明显降低(P<0.05),反之则增加。结论 miR-143通过靶向雌激素受体ER-α36负向调控胃癌细胞SGC7901的侵袭。     

Raptor通过Wnt3a/β-catenin信号通路对乳腺癌侵袭与转移的作用

目的探讨Raptor是否可以通过Wnt3a/β-catenin信号通路促进乳腺癌细胞的侵袭与转移。方法采用免疫印迹法(Western blotting)检测乳腺癌细胞MCF-7和MDA-MB-231(MDA231)中Raptor蛋白的表达情况;采用小RNA(RNAi)干扰技术将质粒转染MDA231,将过表达质粒转染MCF-7;趋化运动实验检测乳腺癌细胞的运动能力;Transwell侵袭实验检测乳腺癌细胞的侵袭能力;Western blotting检测上皮细胞-间充质转化(EMT)标志物的表达情况;核质分离实验检测β-联蛋白(β-catenin)的转核情况。结果 Western blotting法检测结果显示,Raptor在低转移细胞系MCF-7中低表达,而在高转移细胞系MDA231中高表达。转染后,SiRaptor/MDA231细胞组中Raptor蛋白的表达明显下降,MCF-7/Raptor细胞组中Raptor蛋白的表达明显升高,表明转染成功。用Wnt3a刺激处理后,趋化运动和Transwell侵袭实验结果显示,SiRaptor/MDA231细胞组运动和侵袭能力明显降低,MCF-7/Raptor细胞组运动和侵袭能力明显增强。Western blotting法检测结果显示,用Wnt3a和抑制剂Dkk1不同处理后,SiRaptor/MDA231细胞组中上皮-钙黏蛋白(E-cadherin)上调,波形蛋白(vimentin)下调,细胞核中β-catenin的表达降低,而MCF-7/Raptor细胞组中E-cadherin蛋白下调,vimentin蛋白上调,β-catenin蛋白的表达升高。结论 Raptor能通过Wnt3a/β-catenin信号通路促进EMT的发生,进而促进乳腺癌细胞的侵袭与转移。     

pcDNA3.1/NF-κB(p65)表达载体的构建及蛋白表达

目的克隆NF-κB(p65)基因,构建真核表达载体pcDNA3.1/NF-κB(p65),并进行体外表达研究。方法提取B16总RNA,RT-PCR扩增出NF-κB(p65)基因片段,并将其克隆到pcDNA3.1载体中进行序列分析,转染到B16细胞中,Real-time PCR和Western-blot检测NF-κB(p65)的抗原性和表达量。结果获得高质量的B16总RNA,RT-PCR扩增出1.65kb的cDNA片段,成功构建了pcDNA3.1/NF-κB(p65)载体,Blast序列分析与GenBank中NM_009045.4完全一致。NF-κB(p65)重组蛋白具有抗原性,其基因和蛋白表达高于B16细胞组和空质粒pcDNA3.1组。结论成功构建pcDNA3.1/NF-κB(p65)表达载体和表达出具有NF-κB(p65)抗原性的重组蛋白。     

Expression of matrix metalloproteinases and tissue inhibitors of metalloproteinase in uterine endometrial carcinoma and a correlation between expression of matrix metalloproteinase-7 and prognosis

Matrix metalloproteinases (MMPs) are associated with invasion and metastasis of several human malignant tumors, in particular MMP-7, which is mainly produced by the cancer cell itself. We examined the expression of MMP-2, 7 and 9, and tissue inhibitors of metalloproteinase (TIMP)-1 and 2 in uterine endometrial carcinoma, and compared the expression with clinicopathological characteristics in uterine endometrial carcinoma (UEC). A group of 256 patients with UEC received surgery at the Osaka City University Medical School Hospital, and 196 tumor samples were immunohistochemically stained to examine the expression of MMP-2, 7 and 9, and TIMP-1 and 2. Additionally, the invasion ability of cell stain established from UEC was examined using an in vitro invasion assay. The expression of MMP-2, 7 and 9, and TIMP-1 and 2 was observed in the cytoplasm, and the expression of MMP-2 and 7, and TIMP-1 and 2 was observed in stromal cells around the tumor cells. The expression of MMP-7 was significantly stronger in higher-grade than lower-grade tumors (P<0.05). The invasion assay showed that the invasion of cells derived from UECs was significantly inhibited by TIMP-1 and 2. The disease-free interval was significantly shorter when MMP-7 expression was intense. This increased expression of MMP-7 in high grade UECs may be associated with tumor invasion and metastasis, and MMP-7 could serve as a prognostic maker in UEC.     

羽扇豆醇增强对沉默ST3GalⅢ基因的MDA-MB-231细胞侵袭转移的抑制作用

目的 探索羽扇豆醇（Lupeol）增强对沉默ST3GalⅢ基因的人乳腺癌MDA-MB-231细胞侵袭转移的抑制作用。方法 体外培养沉默ST3GalⅢ基因的MDA-MB-231细胞。采用细胞黏附实验,Transwell侵袭实验,细胞划痕实验检测羽扇豆醇对ST3GalⅢ沉默的MDA-MB-231细胞侵袭转移能力的作用。Western blotting检测各组细胞转移相关基质金属蛋白酶（MMP）-2、9和磷脂酰肌醇-3激酶/蛋白激酶B/核因子κB（PI3K/Akt/NF-κB）信号通路蛋白的表达情况。结果 ST3GalⅢ基因沉默及低浓度（5 μmol/L）羽扇豆醇对MDA-MB-231细胞的增殖及凋亡无明显影响。羽扇豆醇对ST3GalⅢ沉默的MDA-MB-231细胞黏附、迁移和侵袭有明显的抑制作用,且相关蛋白MMP-2、-9和PI3K/Akt/NF-κB信号通路蛋白表达均下调。结论 羽扇豆醇体外能增强对沉默ST3GalⅢ基因的人乳腺癌MDA-MB-231细胞侵袭和转移的抑制作用,其机制可能与抑制MMP-2、-9的蛋白表达及影响了PI3K/Akt/NF-κB信号通路有关。     

The role of matrilysin (MMP-7) in leukaemia cell invasion

The matrix metalloproteinases (MMPs) are important in tumour cell invasion and metastasis in many common cancers. However, relatively few studies have investigated the role of MMPs and their inhibitors, the tissue inhibitors of metalloproteinases (TIMPs), in leukaemia cell invasion. This study examined two leukaemia cell lines, K562 and HL-60 and showed that the K562 cell line was four times more invasive than the HL-60 cell line. The expression of MMP-2, matrilysin (MMP-7), MMP-9, TIMP-1, TIMP-2 and TIMP-3 was analysed. Both cell lines produced similar amounts of MMP-2, MMP-9 and TIMP-2. The K562 cells expressed more TIMP-1 than the HL-60 cells and neither cell line expressed TIMP-3. Interestingly, only the K562 cells expressed matrilysin suggesting a potential role for matrilysin in leukaemia cell invasion. In vitro invasion assays performed in the presence of a matrilysin blocking antibody showed a 40% reduction in invasive ability. This data suggests that matrilysin plays an important role in leukaemia cell invasion. This revised version was published online in July 2006 with corrections to the Cover Date.     

Knockdown of ER-α36 expression inhibits glioma proliferation,invasion and epithelial-to-mesenchymal transition

Estrogen receptor-α36 (ER-α36), a subtype of the estrogen receptor, is reported to play roles in tumorigenesis and tamoxifen resistance in several tumors, especially breast cancer. However, the role of ER-α36 in glioma proliferation and invasion remains unknown. Here, we explored the function of ER-α36 in glioma cells, using U87 and U251 cell lines. We found that ER-α36 was upregulated in glioma tissues compared to adjacent nontumor tissues. In U87 and U251 glioma cell lines, inhibition of ER-α36 expression by shRNA suppressed cell proliferation and invasion. In addition, the expression of an epithelial marker, ZO-1, was upregulated while that of one mesenchymal marker, N-cadherin, was downregulated with ER-α36 knockdown. We also found that inhibition of ER-α36 inactivated both PI3K/AKT and MEK/ERK signals. Taken together, these data indicated that overexpression of ER-α36 is associated with glioma proliferation and progression but that inhibition of ER-α36 leads to suppressed invasion and the epithelial-to-mesenchymal transition via PI3K/AKT and MEK/ERK pathway inactivation in glioma cells.     

Exposure to environmental bisphenol A inhibits HTR-8/SVneo cell migration and invasion

Environmental pollutants, such as bisphenol A (BPA) have recently been implicated in the development of adverse birth outcomes. However, the underlying teratogenic mechanisms remain unclear. We investigated the effects of BPA on the migration and invasion of human primary extravillous trophoblast HTR-8/SVneo cells. Our results indicated that BPA reduced cell migration and invasion. Moreover, it altered the ratio of matrix metalloproteinases (MMPs) and tissue inhibitors of MMPs (TIMPs) by downregulating MMP-2 and MMP-9, and upregulating TIMP-1 and TIMP-2. Furthermore, BPA suppressed integrin β1, integrin α5, and vimentin. Interestingly, BPA-induced invasion was partially restored by G15, a membrane G-protein-coupled estrogen receptor 30 antagonist. We further revealed that 42 proteins were differentially expressed by mass spectrometry analysis, which could be divided into three categories based on gene ontology including biological process, cellular component, and molecular function. These results suggest that BPA reduces HTR-8/SVneo cell migration and invasion by downregulating MMP-2 and MMP-9, up-regulating TIMP-1 and TIMP-2, and suppressing adhesion molecules.     

右美托咪定对骨巨细胞瘤细胞增殖、侵袭及迁移的影响

目的探究右美托咪定(dexmedetomidine,DEX)对骨巨细胞瘤细胞增殖、侵袭及迁移的影响.方法将细胞分Control、DEX 0.01、0.1及1μmol/L组.BrdU检测细胞增殖,transwell检测细胞侵袭,划痕实验检测细胞迁移,免疫印迹检测Ki67、PCNA、Bcl-2、VEGF、MMP-2、MMP-9、NF-κB p65及其下游蛋白表达水平、p38 MAPK表达及其下游蛋白磷酸化比值.结果与Control组比较,DEX 0.1、1μmol/L组BrdU阳性细胞百分比、侵袭细胞数、划痕闭合率和Ki67、PCNA、Bcl-2、VEGF、MMP-2、MMP-9表达水平显著降低,抑制p38 MAPK、NF-κB信号通路的激活.结论DEX通过调控p38 MAPK及NF-κB表达抑制骨巨细胞瘤细胞增殖、侵袭及迁移.     

Regulation of tissue-degrading factors and in vitro invasiveness in progression of breast cancer cells

Hormone-independent growth and invasiveness represent phenotypic properties acquired during early progression of breast cancer. We compared human mammary adenocarcinoma cells, MCF-7, which are estrogen-dependent and poorly metastatic, with the estrogen-independent and highly metastatic subline, MCF7/LCC1, with regard to expression of tissue-degrading factors of the matrix metalloproteinase (MMP)-and urokinase (uPA)-dependent degradative pathways, as well as for their in vitro invasive properties. Both cell lines showed low constitutive mRNA expression of the MMP inhibitor TIMP-1. Baseline expression of TIMP-2 mRNA was also very low in MCF-7 cells, whereas the MCF7/LCC1 level was much higher (~10- fold). Furthermore, both cell lines revealed low constitutive capacity to migrate in an in vitro invasion assay. Treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA; 100 nM) induced the mRNAs for TIMP-1 as well as for MMP-1, MMP-9, the uPA receptor, and the uPA inhibitor PAI-1, am ongst which only the responses of MMP-9 and PAI-1 were cell-specific. The mRNA levels of MMP-9 and PAI-1 were ~10-fold and ~15-fold higher in MCF7/LCC1 cells compared to MCF-7 cells. The secretion of immuno-reactive PAI-1 was considerably elevated (. 20-fold) in TPA-treated MCF7/LCC1 cells, whereas the TPA-dependent level of 92-kDa MMP-9 was only ~2-fold higher in MCF7/LCC1 cells than in MCF-7 cells. In both cell lines treatment with TPA was associated with an increase (~10-fold) in in vitro migration, which in the MCF7/LCC1 cells was significantly attenuated by a reconstituted basement membrane extract (Matrigel). These data suggest that TPA-responsive in vitro invasive properties that are probably associ-ated with PAI-1 expression may co-vary with progression from hormone-dependent to -independent breast cancer. © Rapid Science 1998     

Pyrrolidine dithiocarbamate inhibits nuclear factor-κB pathway activation, and regulates adhesion, migration, invasion and apoptosis of endometriotic stromal cells

The activation of nuclear factor-κB (NF-κB) has been implicated in the development and progression of endometriosis. The aim of this study is to investigate the potential application of pyrrolidine dithiocarbamate (PDTC), a potent NF-κB inhibitor, in the treatment of endometriosis. NF-κB-DNA-binding activity, IκB phosphorylation and expression of nuclear p65 protein in endometriotic ectopic stromal cells (EcSCs), endometriotic eutopic stromal cells (EuSCs) and normal endometrial stromal cells (NESCs) were detected by electrophoretic mobility shift assay and western blot analysis. Adhesion, migration, invasion and apoptosis of EcSCs were observed by means of adhesion, migration, invasion and terminal deoxynucleotidyl transferase-mediated dUDP nick-end labeling assay, respectively. Gene and protein expressions of CD44s, matrix metalloproteinase (MMP)-2, MMP-9 and survivin in EcSCs were measured by RT-PCR and western blot analysis. The results showed that PDTC in the absence or presence of interleukin (IL)-1β showed stronger inhibitory effects on NF-κB-DNA-binding activity, IκB phosphorylation and expression of nuclear p65 protein in EcSCs than those in EuSCs or NESCs. PDTC enhanced apoptosis, and suppressed IL-1β-induced cellular adhesion, migration and invasion of EcSCs. Pretreatment of EcSCs with PDTC attenuated IL-1β-induced expressions of CD44s, MMP-2, MMP-9 and survivin at gene and protein levels. All these findings suggest that PDTC induces apoptosis and down-regulates adhesion, migration and invasion of EcSCs through the suppression of various molecules. Therefore, PDTC could be used as a therapeutic agent for the treatment of endometriosis.     

阿可拉定对子宫内膜癌HEC-1B细胞雌激素受体表达的影响

目的研究阿可拉定对人子宫内膜癌细胞株HEC-1B雌激素受体的影响及作用机制。方法体外培养HEC-1B细胞,采用四甲基偶氮唑蓝法(MTT)、逆转录聚合酶链反应法(RT-PCR),观察阿可拉定对HEC-1B细胞增殖作用以及雌激素受体ER-α66和新亚型ER-α36基因表达的影响。结果阿可拉定对HEC-1B细胞增殖具有明显的抑制作用,且抑制作用随药物浓度和给药时间的增加逐渐增强,72h阿可拉定的IC50值为5.26μmol/L。在抑制雌激素受体表达方面,阿可拉定组及阿可拉定联合顺铂组与空白组比较均可明显降低ER-α36的表达(P0.05,P0.01);阿可拉定联合顺铂组还可明显降低ER-α66的表达(P0.01)。结论阿可拉定抑制子宫内膜癌细胞增殖的作用机制可能与其抑制细胞雌激素受体新亚型ER-α36基因表达有关。