隐丹参酮对乳腺癌MDA-MB-231细胞迁移、侵袭的影响及其机制

目的探讨隐丹参酮对乳腺癌MDA-MB-231细胞迁移、侵袭的影响及其机制。方法用不同浓度的隐丹参酮处理MDA-MB-231细胞24 h。采用MTT、划痕实验和Transwell侵袭实验测定不同浓度隐丹参酮对MDAMB-231细胞活性、迁移和侵袭的影响。采用Western blot检测MDA-MB-231细胞中c-Src、p-c-Src Tyr416、FAK、p-FAK Tyr576/577、MMP2蛋白表达水平。结果与0μmol/L对照组相比,5μmol/L、10μmol/L、20μmol/L、40μmol/L隐丹参酮组对MDA-MB-231细胞存活率显著降低,且呈剂量依赖(P0.05)。与对照组相比,5μmol/L、10μmol/L、20μmol/L隐丹参酮组对MDA-MB-231细胞迁移、侵袭率均显著降低,且呈剂量依赖(P0.05)。Western blot结果显示,与对照组相比,不同浓度组经隐丹参酮处理的MDA-MB-231细胞,MMP2蛋白水平和c-Src、FAK蛋白的磷酸化水平均显著下调(P0.05)。结论隐丹参酮可抑制三阴乳腺癌MDA-MB-231细胞活性、迁移和侵袭,其机制可能与其下调c-Src/FAK通路和MMP2表达有关。     

石榴皮多酚对人乳腺癌细胞MDA-MB-231增殖及凋亡的影响

[目的]研究石榴皮多酚对人乳腺癌细胞MDA-MB-231增殖及凋亡的影响。[方法]四甲基偶氮唑盐(MTT)法检测石榴皮多酚对人乳腺癌MDA-MB-231细胞增殖抑制作用;流式细胞仪分析细胞周期及细胞凋亡。[结果]石榴皮多酚对人乳腺癌细胞MDA-MB-231的增殖有抑制作用,且呈现浓度和时间依赖性;石榴皮多酚能诱导MDA-MB-231细胞凋亡,使癌细胞周期被阻滞在G2-M期。[结论]石榴皮多酚可抑制人乳腺癌细胞MDA-MB-231增殖,诱导癌细胞凋亡,并阻滞癌细胞在G2-M期。     

不同浓度吗啡复合罗哌卡因对乳腺癌MDA-MB-231细胞增殖、迁移、侵袭和细胞周期的作用影响

目的 观察不同浓度的吗啡复合罗哌卡因对乳腺癌MDA-MB-231细胞增殖、转移侵袭和细胞周期的影响。方法 人乳腺癌细胞MDA-MB-231细胞接种于培养板24h,随机分为8组：对照组（C组）、罗哌卡因400μg/ml组（R组）、吗啡3μg/ml组（LM组）、吗啡30μg/ml组（MM组）、吗啡300μg/ml组（HM组）、罗哌卡因400μg/ml组+吗啡3μg/ml组（R+LM组）、罗哌卡因400μg/ml+吗啡30μg/ml组（R+MM组）和罗哌卡因400μg/ml+吗啡300μg/ml组（R+HM组）。处理乳腺癌细胞MDA-MB-231细胞24h后,检测其增殖能力、迁移能力、侵袭能力和细胞周期。结果 人乳腺癌细胞MDA-MB-231细胞的增殖抑制情况：单独应用吗啡时,LM组、MM组、HM组均对人乳腺癌细胞MDA-MB-231细胞的增殖具有抑制作用（P<0.05）,并且抑制率随着吗啡浓度的升高而依次增加。单独应用罗哌卡因时对人乳腺癌细胞MDA-MB-231细胞的增殖具有抑制作用（P<0.05）。吗啡与罗哌卡因联合应用时,高浓度吗啡组与罗哌卡因具有协同作用。人乳腺癌细胞MDA-MB-231细胞的迁移情况：单独应用吗啡时,LM组、MM组、HM组均能够抑制细胞迁移率（P<0.05）,迁移率随着吗啡浓度的升高而依次降低。单独应用罗哌卡因能够抑制细胞迁移率（P<0.05）。吗啡与罗哌卡因联合应用时,低浓度和中浓度吗啡组与罗哌卡因具有协同作用（P<0.05）。人乳腺癌细胞MDA-MB-231细胞的侵袭情况：单独应用吗啡时,MM组、HM组均能够抑制细胞侵袭能力（P<0.05）,并且侵袭能力随着吗啡浓度的升高而依次降低,单独应用罗哌卡因时能够抑制细胞的侵袭能力（P<0.05）。吗啡与罗哌卡因联合应用时,中、高浓度组吗啡和罗哌卡因具有协同作用。人乳腺癌细胞MDA-MB-231细胞的细胞周期情况：单独应用高浓度吗啡,能够抑制细胞进入G2/M期（P<0.05）。单独应用罗哌卡因,能够抑制细胞进入G2/M期（P<0.05）,低浓度吗啡与罗哌卡因联合应用对于将细胞抑制在G0/G1期和S期具有协同作用（P<0.05）。结论 吗啡复合罗哌卡因能够抑制乳腺癌MDA-MB-231细胞的增殖、迁移和侵袭,具有联合作用并呈剂量依赖性。     

姜黄素通过调控miR-152对甲状腺癌细胞TPC-1增殖、凋亡、迁移和侵袭的影响

目的:探讨姜黄素对甲状腺癌细胞TPC-1增殖、凋亡、迁移和侵袭的影响及作用机制.方法:将体外培养的TPC-1细胞,分为NC组(细胞常规培养)、低剂量组(25 μmol/L姜黄素作用细胞24 h)、高剂量组(50 μmol/L姜黄素作用细胞24h)、anti-miR-152组(转染miR-152抑制剂)、anti-miR...     

EphrinA2基因促进MDA-MB-231乳腺癌细胞迁移的初步研究

目的 在MDA-MB-231人乳腺癌细胞系中过表达EphrinA2基因,研究其对肿瘤细胞迁移能力的影响,并初步探讨其可能的作用机制。 方法 用脂质体法将EphrinA2真核表达质粒转染至MDA-MB-231细胞中,用Western blot法检测转染前后细胞中EphrinA2、E-Cadherin及p27/Kip1蛋白的表达;并用细胞疏散、细胞划痕及Transwell小室试验检测转染前后细胞迁移能力的变化;用Rac1抑制剂NSC23766抑制Rac1活性后用细胞划痕试验检测细胞迁移能力变化。 结果 转染EphrinA2后的细胞迁移能力更强,并且呈现出E-Cadherin及p27/Kip1蛋白表达下降;用NSC23766抑制Rac1活性能抑制EphrinA2介导的细胞迁移。 结论 EphrinA2能促进MDA-MB-231乳腺癌细胞的迁移,其机制可能与E-Cadherin和p27/Kip1蛋白下调及Rac1活性抑制有关。     

隐丹参酮诱导乳腺癌MDA-MB-231细胞凋亡的研究

目的探讨隐丹参酮对乳腺癌MDA-MB-231细胞凋亡的影响及其机制。方法用不同浓度的隐丹参酮处理MDA-MB-231细胞24 h。采用MTT、流式细胞术检测不同浓度隐丹参酮对MDA-MB-231细胞活性、凋亡的影响。采用Western blot检测MDA-MB-231细胞中Bcl-2、Bax、Caspase-3蛋白表达水平。结果与0μmol/L对照组相比,10μmol/L、20μmol/L、40μmol/L、80μmol/L隐丹参酮组MDA-MB-231细胞存活率显著降低,且呈剂量依赖(P0.05)。流式细胞仪检测显示隐丹参酮在20μmol/L浓度时MDA-MB-231细胞凋亡率为(6.34±0.52)%,与对照组(6.09±0.76)%相比无统计学差异(P0.05)。在40μmol/L、80μmol/L浓度时MDA-MB-231细胞凋亡率分别是(18.74±0.65)%、(28.04±3.08)%,与对照组相比有统计学差异(P0.05),且两浓度组之间相比差异亦有统计学意义(P0.05)。Western blot结果显示,与对照组相比,隐丹参酮在40μmol/L、80μmol/L浓度时,MDA-MB-231细胞内抗凋亡蛋白Bcl-2表达显著下调(P0.05),同时,促凋亡蛋白Bax、Caspase-3表达显著增加(P0.05)。结论隐丹参酮可诱导三阴乳腺癌MDA-MB-231细胞凋亡,其机制可能与激活Bax、Caspase-3和抑制Bcl-2等凋亡调控基因有关。     

番茄红素对乳腺癌细胞MCF-7和MDA-MB-231增殖的影响

目的 观察番茄红素对体外培养的雌激素受体阳性(ER )乳腺癌细胞MCF-7和雌激素受体阴性(ER-)乳腺癌细胞MDA-MB-231的存活率、细胞周期及凋亡的影响.方法 采用MTT法和H3-TdR 掺入法观察番茄红素对两种细胞增殖的影响;流式细胞仪观察同步化的细胞经番茄红素作用后细胞周期及凋亡的变化.结果 番茄红素抑制MCF-7、MDA-MB-231细胞的增殖和DNA合成,具有剂量效应关系,随着时间延长,抑制作用增强,最大抑制率分别为52.6%、61.9%.流式细胞仪结果显示,番茄红素作用24 h后,MCF-7、MDA-MB-231细胞周期各相发生变化,G0/G1期细胞增多,而S期和G2/M期细胞减少,同时可诱发MDA-MB-231细胞凋亡.结论 番茄红素通过阻滞MCF-7细胞于G1期而抑制该细胞的增殖,而对MDA-MB-231细胞增殖的抑制除可通过阻滞细胞周期进程外,还与诱导凋亡有关.     

全反式维甲酸及其衍生物对乳腺癌细胞株MDA-MB-231凋亡的影响

目的：研究全反式维甲酸( ATRA)及其衍生物4-氨基-2-三氟甲基苯基维甲酸酯( ATPR)对人乳腺癌细胞MDA-MB-231体外凋亡的影响。方法不同浓度ATRA及其衍生物ATPR分别处理MDA-MB-231细胞48 h后,Hoechst染色及流式细胞术检测细胞凋亡的变化,RT-PCR检测凋亡蛋白Caspase-3 mRNA水平的变化, Western blot法检测相关凋亡蛋白表达水平的变化。结果与ATRA相比,相同浓度的ATPR能明显促进MDA-MB-231细胞的凋亡,随着浓度的增加,凋亡作用越加显著( P<0．05)。 RT-PCR显示 ATPR作用后Caspase-3 mRNA 水平显著上调( P <0．05)。 Western blot法显示ATPR能下调抗凋亡蛋白Bcl-2、NF-κB、survivin的表达( P<0．05) ,上调促凋亡蛋白Bax、Grim-19、Caspase-3的表达(P<0．05)。结论 ATPR比ATRA更明显地促进人乳腺癌细胞MDA-MB-231的凋亡。     

青葙苷A抑制缺氧乳腺癌MDA-MB-231细胞增殖、迁移和侵袭能力的研究

目的 探索中药青葙子中的齐墩果烷型三萜化合物青葙苷A(celosin A,CA)对缺氧人乳腺癌MDAMB-231细胞的抗肿瘤作用及其相关机制。方法 CoCl2造模MDA-MB-231细胞缺氧状态,建立细胞体外缺氧的CA给药培养体系。采用细胞计数试剂盒（MTT）检测细胞活力,免疫荧光法观察细胞形态学和核凋亡变化。流式细胞术（FCM）法检测细胞凋亡比例;细胞划痕实验检测细胞迁移能力;Transwell法检测CA对肿瘤细胞迁移和侵袭的抑制能力;Western blot实验检测缺氧相关蛋白表达水平和EMT标志蛋白表达水平。结果 在缺氧状态下,高剂量的CA(20、40μmol/L)能抑制乳腺癌MDA-MB-231细胞增殖,诱导肿瘤细胞核凋亡的形态学改变,并且能有效促进早晚期细胞的凋亡率（PI-Annexin V-FITC促凋亡率：20μmol/L:+6.09%;40μmol/L:+18.50%）,有效抑制乳腺癌MDA-MB-231细胞的缺氧诱导因子-1α(HIF-1α)、单核细胞趋化蛋白（MCP）、血管内皮生长因子（VEGF）表达;同时低剂量的CA(5、10μmol/L)能抑制乳腺癌MDA-MB...     

Vascular endothelial growth inhibitor affects the invasion, apoptosis and vascularisation in breast cancer cell line MDA-MB-231

Background Breast cancer is one of the most common malignant female diseases worldwide.It is a significant threat to every woman＇s health.Vascular endothelial growth inhibitor （VEGI） is known to be abundant in endothelial cells.According to previous literature,overexpression of VEGI has been shown to inhibit tumor neovascularisation and progression in cellular and animal models,but there has been limited research on the significance of VEGI in the breast cancer.Methods In our study,cell lines MDA-MB-231 were first constructed in which VEGI mediated by lentivirus over-expressed.The effects of VEGI over-expression on MDA-MB-231 cells were investigated both in vitro and in vivo.The expression of VEGI in the MDA-MB-231 cells after infection of lentivirus was analyzed using real-time PCR and Western blotting.The effect of the biological characteristics of MDA-MB-231 cells was assessed by growth,invasion,adhesion,and migration assay with subcutaneous tumor-bearing nude mice models.Then the growth curves of the subcutaneous tumors were studied.Expressions of VEGI,CD31 and CD34 in the tumors were analyzed by immunohistochemistry and apoptosis was detected by flow cytometry and immunohistochemistry.Results Infection of MDA-MB-231 cells within the lentivirus resulted in approximately a 1 000-fold increase in the expression of VEGI.As can be seen in the invasion,adhesion and migration assay,the over-expression of VEGI can inhibit the ability of MDA-MB-231 cells during migration,adhesion and invasion.The volume of the subcutaneous tumor in the over-expression group was distinctly and significantly less than that of the control groups.Immunohistochemistry analysis of the tumor biopsies cleady showed the expression of VEGI in the over-expression group increased while CD31 and CD34 decreased significantly.In vitro and in vivo,the early apoptosis rate and the apoptosis index were increased within the VEGI over-expression group as compared with the control group.Conclusions Taken together,recombinant lentivirus that were successfully constructed,demonstrated up-regulated VEGI gene expression in breast cancer cells.Lentivirus-mediated over-expression of VEGI weakened the ability of the breast cancer cell migration,adhesion and invasion.Over-expression of VEGI diminished the tumorigenic capacity of breast cancer cells in vivo.Up-regulation of VEGI gene expression however inhibited breast cancer MDA-MB-231 cell in the early apoptosis.     

超氧阴离子和细胞外信号调节激酶在金雀异黄素抑制人乳腺癌细胞浸润中作用的研究

目的:研究金雀异黄素对乳腺癌细胞(MDA-MB-231)浸润能力的影响及其可能机制?方法:不同浓度的金雀异黄素(25~100 μmol/L) 孵育MDA-MB-231细胞24 h,用Transwell assay检测细胞浸润能力;用免疫印迹法比较细胞内磷酸化和总细胞外信号调节激酶(ERK)蛋白含量的改变;用免疫荧光实验检测细胞内磷酸化ERK的分布;用DHE染色及荧光显微镜检测细胞内超氧阴离子水平?结果:金雀异黄素处理使细胞浸润能力降低;同时,金雀异黄素的处理引起细胞内磷酸化ERK量明显降低,且磷酸化ERK在核内含量明显下降;ERK抑制剂U0126作用于细胞亦能明显降低细胞的浸润能力;金雀异黄素处理还能使细胞内超氧阴离子含量明显下降,超氧阴离子清除剂TEMPOL不仅明显抑制磷酸化ERK含量,同时细胞浸润能力也明显降低?结论:金雀异黄素可能通过抑制乳腺癌细胞的超氧阴离子水平和ERK活性,进而抑制MDA-MB-231乳腺癌细胞的浸润能力?     

Vascular endothelial growth inhibitor (VEGI) affects the invasion, apoptotics and vascularisation in breast cancer cell line MDA-MB-231

Background: Breast cancer is one of the most common malignant female diseases worldwide. It is a significant threat to every woman’s health. Vascular endothelial growth inhibitor (VEGI) is known to be abundant in endothelial cells. According to previous literature overexpression of VEGI has been shown to inhibit tumor neovascularisation and progression in cellular and animal models, but there has been limited research on the significance of VEGI in breast. Methods: In our study, cell lines MDA-MB-231were first constructed in which VEGI is lentivirus-mediatedly over-expressed. The effects of VEGI over-expression on MDA-MB-231 cells were investigated both in vitro and in vivo. The expression of VEGI in the MDA-MB-231 cells after infection of lentivirus was analyzed using real-time PCR and Western blot. The effect of biological characteristics of MDA-MB-231 cells was assessed by growth, invasion, adhesion, and migration assay with subcutaneous tumor-bearing nude mice models. Then the growth curves of the subcutaneous tumors were studied. Expressions of VEGI, CD31 and CD34 in the tumors were analyzed by immunohistochemistry and apoptosis was detected by flow cytometry and immunohistochemistry. Results: Infection of MDA-MB-231 cells within the lentivirus resulted in an approximately a 1000-fold increase in the expression of VEGI. As can be seen in the invasion, adhesion and migration assay - the over-expression of VEGI can inhibit the ability of MDA-MB-231 cells during migration, adhesion and invasion. The volume of the subcutaneous tumor in over-expression group was distinctly and significantly less than that of the controlled groups. Immunohistochemistry analysis of the tumor biopsies clearly showed the expression of VEGI in the over-expression group increased while CD31 and CD34 decreased significantly. In vitro and in vivo, the early apoptosis rate and the apoptosis index were increased within the VEGI over-expression group as compared with the control group. Conclusions: Taken together, recombinant lentivirus that were successfully constructed, demonstrated up-regulated VEGI gene expression in breast cancer cells. In vitro, lentivirus-mediated over-expression of VEGI weakened the ability of the breast cancer cell migration, adhesion and invasion. Over-expression of VEGI diminished the tumorigenicity capacity of breast cancer cells in vivo. Up-regulation of VEGI gene expression however inhibited breast cancer MDA-MB-231 cell in the early apoptosis In vitro and In vivo.     

Wnt5a/Dvl2/Rac1信号通路调控MDA-MB-231人乳腺癌细胞的迁移

目的:探讨Wnt5a信号通路调控MDA-MB-231人乳腺癌细胞迁移的分子机制?方法:在建立了划痕实验检测MDA-MB-231人乳腺癌细胞迁移模型的基础上,研究Wnt5a/Dvl2/Rac1信号通路对MDA-MB-231人乳腺癌细胞迁移的调控?结果:高表达的Rac1可促进MDA-MB-231人乳腺癌细胞的迁移,干扰Rac1的表达可显著降低其迁移,Rac1活性受Wnt5a/Dvl2信号通路的调控?结论:Wnt5a/Dvl2/Rac1信号通路可调控MDA-MB-231人乳腺癌细胞的迁移,此为深入阐明乳腺癌细胞转移的分子调控机制提供了新线索?     

去甲斑蝥素通过诱导自噬体聚集促使乳腺癌MDA-MB-231细胞凋亡

探究去甲斑蝥素（norcantharidin,NCTD）对三阴性乳腺癌MDA-MB-231细胞增殖和凋亡的影响。采用Western blot实验检测NCTD对MDA-MB-231细胞中凋亡相关蛋白Bax/Bcl-2、cleaved-PARP/PARP、cleaved-caspase-9、cleaved-caspase-3和MCL-1表达水平的影响;采用Western blot实验检测NCTD对MDA-MB-231细胞中自噬相关蛋白LC3-II/LC3-I,Parkin和PINK1表达水平的影响;采用流式细胞术检测NCTD对MDA-MB-231细胞线粒体膜电位及线粒体活性氧（reactive oxygen species,ROS）变化情况的影响;采用共聚焦显微镜检测NCTD对表达mCherry-EGFP-LC3的MDA-MB-231细胞自噬流的影响;采用流式细胞术检测NCTD联合使用氯喹（chloroquine,CQ）或3-甲基腺嘌呤（3-methyladenine,3-MA）后,对MDA-MB-231细胞凋亡情况的影响。实验结果显示,NCTD可显著上调Bax/Bcl-2、cleaved...     

Effect of amlodipine on apoptosis of human breast carcinoma MDA-MB-231 cells

Objective： To elucidate the effects of amlodipine on the proliferation and apoptosis of human breast carcinoma MDA-MB-231 cells. Methods： Light microscopy was used to determine the effects of amlodipine on cell morphology; Flow cytometry was used to quantitate cells undergoing apoptosis; the expression of a cell cycle-related protein, proliferating cell nuclear antigen （PCNA） and an antiapoptosis protein, Bcl-2 were assessed by immunocytochemistry. Results： Amlodipine concentration of 8.25umol/L （1/2 of ICs0） affected the morphology, decreased the expression of PCNA and Bcl-2 and induced apoptosis of human breast carcinoma MDA-MB-231 cells. Conclusion： The effect of amlodipine on the antiproliferation of human breast carcinoma MDA-MB-231 cells is related to inducement of apoptosis, and the decrease of the expression of Bcl-2 and PCNA may be the possible mechanism for proliferation inhibitory and inducement of apoptosis.     

虫草素对MDA-MB-231细胞增殖的影响与TMSG-1表达的研究

目的 研究虫草素对乳腺癌细胞株MDA-MB-231的作用与人肿瘤转移抑制基因TMSG-1mRNA表达的影响,探讨其抗癌作用机制.方法 体外培养乳腺癌细胞株MDA-MB-231,加入虫草素干扰,免疫组化技术检测TMSG-1蛋白表达;半定量RT-PCR检测MDA-MB-231细胞中TMSG-1mRNA表达状况;使用MTT法检测对肿瘤细胞增殖的抑制作用.结果 虫草素可使乳腺癌MDA-MB-231细胞中TMSG-1mRNA与蛋白表达上调,同时对乳腺癌细胞生长有抑制作用.结论 虫草素能抑制乳腺癌细胞的增殖,可以上调TMSG-1 mRNA与蛋白的表达发挥潜在的抗肿瘤细胞转移的作用,为国产新型抗肿瘤药物的临床研发及运用提供实验室依据.     

氨氯地平对人乳腺癌细胞株MDA-MB-231侵袭影响的体外实验

目的 探讨氨氯地平对人乳腺癌高转移细胞株MDA-MB-231体外侵袭的影响及其相关机制.方法 用8.34 μmol/L氨氯地平处理肿瘤细胞,以人工重组基底膜侵袭小室(Transwell)观察氨氯地平对MDA-MB-231细胞侵袭的影响;免疫细胞化学方法检测血管内皮生长因子(vascular endothelial growth factor,VEGF)和基质金属蛋白酶-9(matrix met-allo-proteinaae,MMP-9)的表达.结果 8.34 μmol/L的氨氯地平可显著抑制MDA-MB-231细胞的侵袭能力,侵袭抑制率为36.27%;免疫细胞化学检测结果显示,MMP-9和VEGF蛋白的表达在MDA-MB-231细胞中亦明显降低.结论 氨氯地平对MDA-MB-231细胞体外侵袭具有明显的抑制作用,此作用与降低肿瘤细胞的MMP-9和VEGF的表达有关.