Specific expression of matrix metalloproteinases 1, 3, 9 and 13 associated with invasiveness of breast cancer cells in vitro

Several matrix metalloproteinases (MMPs) and tissue inhibitors of MMPs (TIMPs) were studied in highly invasive (MDA-MB-231) and slightly invasive (MCF-7, T47D, BT-20) breast cancer cell lines. Investigations were carried out at the protein level and/or at the mRNA level, either in cells cultured as monolayers on plastic, or in cells seeded on a thin layer of Matrigel basement membrane matrix. Analysis of MMP expression by RT-PCR showed expression of MMP-1, MMP-3, and MMP-13 in highly invasive MDA-MB-231 cells, but not in slightly invasive cell lines. The extracellular secretion of MMP-1 and MMP-3 by MDA-MB 231 cells could be also shown by ELISA. TIMP-1 and TIMP-2 mRNAs were found in all cell lines, however, the extracellular secretion of both TIMPs was much higher in MDA-MB-231 cells than in the other cell lines. When the cells were cultured on Matrigel matrix, MMP-9 expression was induced in MDA-MB-231 cells only, as assessed by RT-PCR and zymography experiments. The invasive potential of MDA-MB-231 cells evaluated in vitro through Matrigel was significantly inhibited by the MMP inhibitor BB-2516, by 25% and 50% at the concentrations of 2 × 10⁻⁶M and 10⁻⁵M, respectively. In conclusion, our data show that highly invasive MDA-MB-231 cells but not slightly invasive T47D, MCF-7 and BT-20 cells express MMP-1, MMP-3, MMP-9 and MMP-13. MMP-9 which is specifically up-regulated by cell contact to Matrigel, may play a key role in the invasiveness of MDA-MB-231 cells through basement membranes. This revised version was published online in July 2006 with corrections to the Cover Date.     

Urokinase-type plasminogen activation in three human breast cancer cell lines correlates with their in vitro invasiveness

In order to invade and spread cancer cells must degrade extracellular matrix proteins. This degradation is catalysed by the concerted action of several enzymes, including the serine protease plasmin. Several experimental studies have shown that inhibition of plasmin formation reduces cancer cell invasion and metastasis, indicating a critical role of this proteolytic pathway in these processes. In order to further study the role of plasmin in cancer progression, we have characterized urokinase-type plasminogen activator (uPA) mediated plasmin formation in three human breast cancer cell lines. Using monoclonal antibodies against uPA and its receptor uPAR, we have investigated the contribution of uPA and uPAR to invasive capacity in an in vitro invasion assay. MDA-MB-231 BAG cells were found to express high protein levels of uPA, uPAR and PAI-1. MDA-MB-435 BAG cells produced low amounts of uPA, PAW and moderate amounts of uPAR, whereas MCF-7 BAG cells showed low levels of uPA, uPAR and PAM protein. In a plasmin generation assay MDA-MB-231 BAG cells were highly active in mediating plasmin formation, which could be abolished by adding either an anticatalytic monoclonal antibody to uPA (clone 5) or an anti-uPAR monoclonal antibody (clone R3), which blocks binding of uPA to uPAR. The two other cell lines lacked the capacity to mediate plasmin formation. In the Matrigel invasion assay the cells showed activity in this order: MCF-7 BAG < MDA-MB-435 BAG < MDA-MB-231 BAG. Testing MDA-MB-231 BAG cells in the Matrigel invasion assay revealed that invasion could be inhibited in a dose-dependent manner either by the clone 5 uPA antibody or by the clone R3 uPAR antibody, suggesting that the cell surface uPA system is actively involved in this invasive process. It is concluded that these three cell lines constitute a valuable model system for in vitro studies of the role of cell surface uPA in cancer cell invasion and has application in the search for novel compounds which inhibit mechanisms involved in uPA-mediated plasmin generation on cancer cells.     

重组TFPI-2影响人卵巢癌细胞体外迁徙浸润能力的研究

目的 :从功能角度研究重组组织因子途径抑制物 2 (TFPI 2 )对人卵巢癌细胞体外迁徙、浸润能力的影响。方法 :①迁徙实验 ,加不同浓度TFPI 2培养的A2 780细胞和不加TFPI 2的A2 780细胞 ,通过Boyden小室体外浸润转移模型 ,以迁徙到聚碳脂微孔滤膜 (PVPF)背面的每高倍镜视野中的平均细胞数作为评价人卵巢癌细胞迁徙能力强弱的指标。②浸润实验在PVPF膜铺上基底膜基质胶 (Matrigematrix)后 ,行迁徙实验。结果 :①迁徙实验中 ,将A2 780 TFPI 2不同浓度组与A2 780对照组细胞穿过PVPF膜的细胞数进行比较 ,经t检验 ,没有统计学意义 (P >0 .0 5)。②浸润实验中 ,将A2 780 TFPI 2不同浓度组与A2 780对照组的细胞穿过人工膜的细胞数进行比较 ,及TFPI 2不同浓度组间的细胞数进行比较 ,经t检验 ,均有非常显著差异 (P <0 .0 1)。结论 :重组TF PI 2对人卵巢癌细胞体外自身运动能力无影响 ,但可显著抑制人卵巢癌细胞的体外浸润能力 ,为卵巢癌的蛋白酶抑制剂治疗提供一可能的靶向依据。     

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.     

NOGGIN基因过表达对MDA-MB-231乳腺癌细胞系增殖和侵袭的影响及机制

目的 基因对乳腺癌细胞MDA-MB-231增殖、侵袭能力的影响,并初步探讨其机制.方法 表达NOGGIN方法以NOGGIN重组腺病毒感染乳腺癌细胞系MDA-MB-231,MTT法检测细胞增殖能力,划痕修复实验及Transwell细胞侵袭实验检测其运动和侵袭能力,定量RT-PCR和总蛋白Western blot检测CXC...     

Nm23-H1 homologs suppress tumor cell motility and anchorage independent growth

Nm23-H1 suppresses metastasis, as well as in vitro cell motility, invasion and anchorage independent growth, in a variety of cancer models. Eight human homologs of Nm23 have been identified that share 26–88% identity with the prototype Nm23-H1. Here, we examine the potential of its homologs, -H2, DR-, -H4 and -H5, to inhibit in vitro correlates of metastasis in two highly metastatic human cell lines, MDA-MB-435 and MDA-MB-231. The metastatic cells were transfected with mammalian expression constructs containing the genes encoding for Nm23-H1, -H2, DR-, -H4 and -H5 and the resultant transfectants were analyzed by Boyden chamber motility and soft agar colonization assays. Nm23-H1 suppressed motility by 3.3- and 1.5-fold in MDA-MB-435 and MDA-MB-231 cells, respectively and inhibited anchorage independent growth in soft agar by 2.9- and 1.9-fold, respectively. None of the -H1 homologs were capable of suppressing motility in MDA-MB-435 cells, but in MDA-MB-231 cells, -H2 inhibited motility by 3-fold upon overexpression. When anchorage independent growth was assessed, -H2, -H4 and -H5 suppressed growth from 1.2- to 2.0-fold in both cell lines. Given their ability to suppress anchorage independent growth, Nm23-H1 homologs -H2, -H4 and -H5 may have some capacity to suppress metastasis. Motility suppression appears to be cell context dependent, but sequence disparities between -H1/H2 and the other family members may reveal regions critical for this inhibitory phenotype. Similarly, sequence differences between DR-Nm23 and its homologs may be important for anchorage independent growth suppression.     

Effect of MRC-5 fibroblast conditioned medium on breast cancer cell motility and invasion in vitro

We used Transwell chambers to study separately cellular motility and invasion. In order to assess the cellular motility, polycarbonate microporous filters were coated with extracellular matrix proteins which adsorbed on the filters without clogging the pores. To investigate the invasive behavior of tumor cells, filters were covered with a layer of Matrigel which clogged the pores. The motility and the invasion of breast cancer cell lines (MDA-MB-231, MCF-7/6 and MCF-7/AZ cells) were assessed quantitatively in different culture media: defined (serum-free), serum-containing and normal human fibroblast MRC-5 conditioned media. Inserum-containing medium, tumor cells migrated and invaded through the coated and covered filters. Their motility and invasion potentials were considerably lower in defined medium, whereas medium conditioned by MRC-5 fibroblasts stimulated both motility and invasion but not growth. The MRC-5 conditioned medium induced also the spreading of clusters of MCF-7 /6 cells grown on Matrigel-coated plates. © Rapid Science 1998     

5-氮杂-2’-脱氧胞苷通过反转原钙黏蛋白10表达抑制人乳腺癌细胞系MDA-MB-231的侵袭和迁移

目的 探讨5-氮杂-2’-脱氧胞苷（5-Aza-CdR）诱导抑癌基因原钙黏蛋白10（PCDH10）重新表达对人乳腺癌细胞MDA-MB-231体外侵袭迁移能力的影响并初步探讨其机制。 方法 体外培养人乳腺癌细胞MDA-MB-231,设置对照组和5-Aza-CdR药物处理组,分别采用反转录聚合酶链反应（RT-PCR）检测PCDH10 mRNA 的表达水平;Transwell法和划痕实验检测细胞的侵袭迁移能力;Western blotting检测PCDH10、DNA甲基转移酶（DNMT）3A、DNMT3B、核因子（NF）-κB p65和基质金属蛋白酶（MMP）-2、MMP-9蛋白表达的变化。 结果 5-Aza-CdR能够反转PCDH10的mRNA和蛋白表达;PCDH10表达恢复后MDA-MB-231细胞的侵袭迁移能力受到抑制;Western blotting检测发现,MDA-MB-231细胞经5-Aza-CdR处理后DNMT3A、DNMT3B、NF-κB p65、MMP-2和MMP-9的表达下调。 结论 5-Aza-CdR可抑制MDA-MB-231细胞DNMT3A和DNMT3B的表达,使抑癌基因PCDH10表达恢复,从而通过阻滞NF-κB p65的活化,下调MMP-2和MMP-9表达而抑制乳腺癌细胞的侵袭转移。     

Characterisation of breast cancer cell lines and establishment of a novel isogenic subclone to study migration,invasion and tumourigenicity

The process of tumour invasion and subsequent metastasis represents the most lethal aspect of cancer. In this study the invasive and migratory activity of four human breast cancer cell lines; MCF-7, MDA-MB-231, BT474 and Hs578T was investigated. Isogenic subclones were isolated from the Hs578T cell line using sequential passages through the BD Matrigel Invasion Chamber assay system. A new invasive subclone designated, Hs578Ts(i)8 was isolated and shown to be 3-fold more invasive and 2.5-fold more migratory than the parental cell line. The variant cells formed up to 25 times more colonies in soft agar and also produced tumours in vivo in nude mice. Flow cytometry analysis showed that the Hs578Ts(i)8 cells had 30% more CD44+/CD24-/low cells than the parental Hs578T cell line. The presence of a breast cancer stem cell population within the variant cell line may provide an explanation for the increased anchorage independent growth and tumourigenicity.     

增殖抑制基因抑制乳腺癌细胞生长和侵袭及其相关机制研究

目的 研究增殖抑制基因(HSG)对乳腺癌MDA-MB-231细胞(简称231细胞)生物学行为的影响并对其作用机制进行探讨.方法 构建HSG全长真核表达载体,通过脂质体瞬时转染法使其在231细胞中高表达,通过MTT比色实验检查肿瘤细胞的体外增殖能力、Matrigel穿膜实验检测肿瘤细胞体外侵袭能力和应用流式细胞术检测肿瘤细胞的细胞周期及凋亡情况;并应用GST-pulldown法检测HSG高表达对乳腺癌细胞Ras蛋白活性的影响.结果 将构建好的重组人HSG真核表达质粒pcDNA3-MYC-HSG转染至231细胞中,MTT比色实验结果显示HSG的过表达可以抑制肿瘤细胞的增殖;Matrigel侵袭实验显示转染HSG的肿瘤细胞的穿膜细胞数(HSG/231组,78.5个±5.8个)与转染空载体组(vector/231组,131.1个±14.5个)相比明显减少.流式细胞分析结果显示转染HSG/231组细胞出现了G_0/G_1期阻滞(56.3%±2.3%),且凋亡细胞的百分比与对照组(vector/231组为50.4%±1.9%)相比有所增加.Ras蛋白活性检测发现转染HSG/231组的乳腺癌细胞Ras蛋白活性明显下降.结论 HSG表达上调可抑制高侵袭性231细胞的体外增殖和侵袭能力,使其出现G_0/G_1期细胞周期阻滞,并可促进细胞凋亡.HSG对乳腺癌细胞的抑制作用可能与其抑制细胞Ras活性有关.     

低氧诱导因子-1对人乳腺癌细细胞系侵袭和转移能力的影响

目的 探讨低氧诱导因子(HIF)-1对人乳腺癌细胞系侵袭和转移能力的影响.方法 对正常氧和低氧培养的细胞,采用Western blot检测细胞HIF-1α、磷酸化波形蛋白和tubulin蛋白的表达;采用小干扰RNA(siRNA)干扰MDA-MB-231和SK-BR-3细胞的HIF-1α蛋白表达;穿膜侵袭和划痕修复实验检测干扰细胞的侵袭和迁移能力.结果 多种乳腺癌细胞系均有HIF-1α蛋白的基础和低氧诱导表达,以高侵袭转移能力的细胞系MDA-MB-231表达最强;经siRNA干扰HIF-1α后,细胞的侵袭和迁移能力随之明显减弱,磷酸化波形蛋白表达降低.结论 HlF-1促进乳腺癌细胞系的侵袭和迁移,可能成为抗肿瘤转移治疗的靶点.

Abstract：

Objective To investigate HIF-1 α gene expression in human breast cancer cells and the role of HIF-i in tumor metastasis and invasion. Methods Human breast cancer cell lines were cultured under normoxic or hypoxic conditions. Western blot was used to evaluate the protein expression of HIF-1α,p-vimentin and α-tubulin. Small interfering RNA targeting HIF-1α was used to block the expression of HIF1α in MDA-MB-231 and SK-BR-3 cell lines. Matrigel transwell and cell wound healing assays were used to detect the capability of cellular invasion and migration, respectively. Results Under normoxic condition,all the cell lines tested showed a base-level of HIF-1αt expression. The highest expression level of HIF-1αprotein was obtained in the MDA-MB-231 cell line, which is also noticed to be highly invasive and migratory in behavior. HIF-1α siRNA was capable of blocking the protein expression of both HIF-1α and p-vimentin and in addition, the attenuated ability of invasion and migration. Conclusion Since HIF-1 is able to promote invasion and metastasis of tumor cells, which may be considered as a target in anti-cancer therapy.     

Gli1 enhances migration and invasion via up-regulation of MMP-11 and promotes metastasis in ERα negative breast cancer cell lines

Gli1 is an established oncogene and its expression in Estrogen Receptor (ER) α negative and triple negative breast cancers is predictive of a poor prognosis; however, the biological functions regulated by Gli1 in breast cancer have not been extensively evaluated. Herein, Gli1 was over-expressed or down-regulated (by RNA interference and by expression of the repressor form of Gli3) in the ERα negative, human breast cancer cell lines MDA-MB-231 and SUM1315. Reduced expression of Gli1 in these two cell lines resulted in a decrease in migration and invasion. Gli1 over-expression increased the migration and invasion of MDA-MB-231 cells with a corresponding increase in expression of MMP-11. Silencing MMP-11 in MDA-MB-231 cells that over-expressed Gli1 abrogated the Gli1-induced enhancement of migration and invasion. Sustained suppression of Gli1 expression decreased growth of MDA-MB-231 in vitro by increasing apoptosis and decreasing proliferation. In addition, silencing of Gli1 reduced the numbers and sizes of pulmonary metastases of MDA-MB-231 in an in vivo experimental metastasis assay. In summary, Gli1 promotes the growth, survival, migration, invasion and metastasis of ERα negative breast cancer. Additionally, MMP-11 is up-regulated by Gli1 and mediates the migration and invasion induced by Gli1 in MDA-MB-231.     

Ezrin and BCAR1/p130Cas mediate breast cancer growth as 3-D spheroids

CAS proteins and Ezrin, Radixin, Moesin (ERM) family members act as intracellular scaffolds and are involved in interactions with the cytoskeleton, respectively. Both protein families have previously been associated with metastasis and poor prognosis in cancer. Our group recently reported on the overexpression of EZR/VIL2 and BCAR1 and their protein products in breast carcinoma effusions compared to primary breast carcinoma. In the present study, the role of these two proteins was studied in semi-normal MCF10A cells and metastatic MDA-MB-231 breast carcinoma cells cultured in tri-dimensional (3-D) conditions that were hypothesized to reproduce the in vivo conditions of breast cancer metastasis. MCF10A cells formed spheroid-shaped colonies without any Matrigel invasion, while MDA-MB-231 cells displayed an invasive phenotype and showed satellite projections that bridged multiple cell colonies in 3-D culture. E-cadherin was expressed in MCF10A, but not in MDA-MB-231 cells. The temporal expression of ezrin and BCAR1/p130Cas at the mRNA and protein level differed in the two cell lines upon 3-D culturing on Matrigel. Upregulation of BCAR1/p130cas was observed in the transition of MDA-MB-231 from attached to detached culture. Silencing of Ezrin and p130Cas in MDA-MB-231 cells by short hairpin RNA resulted in decreased invasive potential, and p130Cas silencing further resulted in smaller spheroid/colony formation. Our data show that MCF10A and MDA-MB-231 cells differ in their ability to form spheroids, in expression of E-cadherin and in the expression of Ezrin and BCAR1/p130Cas in 3-D cultures on Matrigel, suggesting a role in tumor progression in breast carcinoma.     

CADM1过表达对人胃癌MKN-45细胞增殖和侵袭的影响及其分子机制

 目的：研究细胞黏附分子1（cell adhesion molecule 1,CADM1）过表达对人胃癌MKN-45细胞增殖和侵袭的影响并探讨其可能的分子机制。方法：采用Western blotting检测3株胃癌细胞系中CADM1蛋白的表达。构建pcDNA-CADM1真核表达载体,并将其转染MKN-45细胞,采用G418筛选稳定表达CADM1的细胞株,利用Western blotting鉴定所筛选的稳定细胞株。采用CCK-8试剂和Boyden小室分析过表达CADM1对MKN-45细胞增殖和侵袭的影响。利用Western blotting检测细胞增殖和侵袭相关蛋白表达。结果：MKN-45细胞中CADM1蛋白的相对表达水平显著低于MKN-28和SGC-7901细胞（P<0.05）。此外,成功构建pcDNA-CADM1真核表达载体,并获得稳定过表达CADM1的MKN-45细胞株。CCK-8结果显示,与未处理组和pcDNA3.1组相比,pcDNA-CADM1组中MKN-45细胞的增殖明显受到抑制（P<0.05）。Boyden小室体外侵袭实验结果显示,与未处理组（101.53±6.89）和pcDNA3.1组（98.77±7.03）相比,pcDNA-CADM1组中MKN-45细胞穿膜的细胞数（52.35±3.89）显著减少（P<0.05）。Western blotting结果显示,与未处理组和pcDNA3.1组相比,pcDNA-CADM1组中p21蛋白表达显著上调,而MMP-2和MMP-9表达显著下调（P<0.05）。结论：CADM1过表达能明显抑制胃癌细胞的增殖和侵袭能力,因而CADM1有望成为胃癌治疗的新靶点。     

人肿瘤转移抑制基因1转染对人乳腺癌细胞MDA-MB-231体外生物学行为的影响

目的研究人肿瘤转移抑制基因1（TMSG-1）转染引起人乳腺癌细胞MDA-MB-231体外生物学行为的改变及对肿瘤转移表型的影响。方法构建TMSG-1全长编码序列真核表达载体,稳定转染人乳腺癌MDA-MB-231细胞系,G418筛选挑取TMSG-1过表达阳性克隆。通过MTT比色实验、软琼脂集落形成实验检测体外细胞生长能力;Matrige1穿膜实验检测肿瘤细胞体外侵袭能力。TMSG-1瞬时转染24、48h,分别用Annexin-V碘化丙啶（PI）双标流式细胞术检测肿瘤细胞凋亡情况。结果从稳定转染TMSG-1的MDA-MB-231细胞中挑取3个TMSG-1-FLAG融合蛋白表达量较高的阳性克隆株用于下游生物学行为实验。M1Tr比色实验及软琼脂集落形成实验结果显示,TMSG-1正义转染各组（S1、S2、S3）细胞增殖速度及克隆形成数与未转染组及转染空载体组相比均明显减低（P〈0．05）;Matrigel穿膜实验显示,正义转染各组的穿膜细胞数[（72．3±8．1）个、（85．0±4．2）个、（73．5±7．8）个]与未转染组[（187．5±2．1）个]和转染空载体组[（162。3±6．8）个]相比均明显减少（P〈0．01）。TMSG．1瞬时转染MDA．MB-231细胞,转染24和48h均可引起细胞凋亡率的增加（P〈0．05）。结论TMSG．1表达上调可使人乳腺癌细胞MDA-MB-231体外生长速度、锚着不依赖性生长能力及侵袭能力明显降低,细胞凋亡增加。该实验为TMSG-1是一个新发现的肿瘤转移抑制基因提供了证据。     

A rapid and sensitive fluorometric screening assay using YO-PRO-1 to quantify tumour cell invasion through Matrigel

A new quantitative assay for the study of tumour cell invasionin vitro is described. Employing the novel fluorescent dye YO-PRO-1, cells that penetrate Matrigel-coated transwells are counted on the basis of dye-bound cellular nucleic acid content. Following transmigration, the cells in the lower compartments are lysed by freezing in water. After a brief incubation with YO-PRO-1, nucleic acid or DNA content is measured as fluorescence intensity in 96-well microplates and quantitated by a cell- or DNA-calibration curve. Using standard curves, a linear relationship between fluorescence intensity and cell number was found in the range tested (from 100 to 80 000 cells). The mean relative intra- and inter-assay variability of the cell quantitation in this range was 3.5 and 4.2%, respectively. When applied to Matrigel invasion studies, as few as 400 cells could be counted. The quantitation could be performed within 3 h. HCT 116, MDA MB 231 and HT 29 cells were investigated as examples of tumour cells with different invasive abilities in the 48-h Matrigel invasion assay. Using YO-PRO-1, 6.5 ± 0.6% invasive HCT 116 cells and 52.6 ± 4.5% MDA MB 231 cells (percentage of the inoculated cell population) were measured. HT 29 cells were practically non-invasive. These results were confirmed by visual scoring of DAPI-stained nuclei. In conclusion, the main advantages of the assay are its sensitive, reproducible and rapid quantitation of tumour cell invasionin vitro and the applicability to extended sample numbers by measuring in 96-well microplates.     

NOGGIN基因过表达对MDA-MB-231乳腺癌细胞系增殖和侵袭的影响及机制

目的基因对乳腺癌细胞MDA-MB-231增殖、侵袭能力的影响,并初步探讨其机制。方法表达NOGGIN方法以NOGGIN重组腺病毒感染乳腺癌细胞系MDA-MB-231,MTT法检测细胞增殖能力,划痕修复实验及Transwell细胞侵袭实验检测其运动和侵袭能力,定量RT-PCR和总蛋白Western blot检测CXCR4和MMP1的表达。结果过表达NOGGIN基因的MDA-MB-231细胞增殖能力增强(P<0.05);细胞划痕愈合延迟;NOGGIN组穿膜细胞数为79±4,显著低于空病毒组的135±7(P<0.05)。过表达NOGGIN后,细胞中CXCR4和MMP1的表达下调(P<0.05)。结论 NOGGIN蛋白可抑制乳腺癌细胞MDA-MB-231的运动和迁移。其机制可能与下调CXCR4和MMP1的表达相关。