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1.
熊果酸对MCF-7乳腺癌细胞生长的影响   总被引:1,自引:0,他引:1  
目的 观察熊果酸对MCF-7乳腺癌细胞增殖、凋亡、细胞侵袭及裸鼠移植瘤生长的影响.方法 将1、10、100 μmol/L的熊果酸分别作用于乳腺癌MCF-7细胞12、24、48 h,噻唑蓝(MTT)比色法检测细胞活力变化及生长抑制率,流式细胞术及Transwell小室法检测熊果酸作用48h时MCF-7细胞周期、细胞凋亡率及细胞侵袭力.将乳腺癌MCF-7细胞接种于裸鼠,成瘤后分为生理盐水对照组、熊果酸低剂量组(每日1 mg/kg)、中剂量组(每日5 mg/kg)和高剂量组(每日25 mg/kg),检测5、10、15 d裸鼠移植瘤体积、肿瘤生长抑制率及15 d时肝肾功能、血常规变化.结果 随熊果酸浓度增加及作用时间延长,MCF-7细胞生长及凋亡发生受到显著影响,100 μmol/L熊果酸作用48 h时,细胞生长抑制率为46.0%,生长周期阻滞于G0/G1期,细胞凋亡率为(16.48±2.46)%,细胞侵袭力显著下降.熊果酸组裸鼠移植瘤体积显著小于对照组,15 d时熊果酸高剂量组肿瘤体积为(323.5±33.5)mm3生长抑制率为50.9%.各组肝肾功能和血常规无明显变化.结论 熊果酸可引起体外乳腺癌McF-7细胞增殖抑制、细胞凋亡率增加及细胞侵袭力下降,可显著抑制裸鼠乳腺癌移植瘤生长.  相似文献   

2.
目的 探讨腺病毒介导的靶向survivin的小干扰RNA(siRNA)对乳腺癌MCF-7细胞雌激素受体(ER)表达的影响.方法 构建靶向survivin的siRNA腺病毒载体并转染乳腺癌MCF-7细胞,采用Western blot法检测MCF-7细胞转染腺病毒后survivin、ER表达的变化.结果 实验组、阴性组、空白组survivin的表达强度分别为0.09 ±0.04、0.86±0.08、0.82 ±0.17;ER的表达强度分别为1.57 ±0.09、1.16±0.10、1.23±0.01.统计学分析表明,本研究中所构建的靶向survivin的siRNA腺病毒载体可以高效地抑制survivin的表达,抑制survivin的表达可以显著上调乳腺癌MCF-7细胞ER的表达(P<0.05).结论 在乳腺癌MCF-7细胞中,survivin与ER信号通路之间可能存在着某种相互调节机制,提示靶向survivin的siRNA在ER阳性乳腺癌的内分泌治疗中可能具有潜在的重要意义.  相似文献   

3.
目的 探讨膜-细胞骨架联接蛋白Ezrin对人乳腺癌MCF-7细胞生长和侵袭能力的影响.方法 采用小干扰RNA方法下调人乳腺癌MCF-7细胞中Ezrin的表达,分别通过RT-PGR和Western blot检测siRNA下调Ezrin基因和蛋白表达的水平.并采用MTT法检测细胞增殖能力,流式细胞仪榆测细胞周期,Transwell实验检测细胞侵袭能力. 结果 RT-PCR和Western blot结果显示,RNA干扰后Ezrin基因蛋白水平均明显下调(F=41.97,P<0.01),RNA干扰后MCF-7细胞G2-M期细胞比例下降(t=-5.997,P<0.01);细胞凋亡增加(t=4.479,P<0.01);细胞的侵袭能力下降,穿过人工基底膜的细胞数量明显减少(t=5.268,P<0.01).结论 Ezrin在乳腺癌生长和侵袭转移过程中发挥重要作用.  相似文献   

4.
目的探讨将真核表达载体pcDNA3.1-VEGF—C重组质粒转染入人乳腺癌MCF-7细胞后VEGF-C表达的变化。方法通过脂质体介导方法,将构建好含有VEGF—C的重组质粒转染入人乳腺癌MCF-7细胞中,新霉素(G418)筛选得到稳定转染细胞系,RT—PCR和Western blot方法检测稳定转染后细胞中VEGF—C mRNA和蛋白的表达。结果成功转染并获得稳定高表达VEGF—C的乳腺癌MCF-7细胞系,其转染组VEGF—C mRNA相对吸光度值(12.382±2.183)较空载组(6.039±1.950)显著上调(P〈0.01)。Western blot检测转染组VEGF-C蛋白相对灰度值(0.971±0.186)较空载组(0.594±0.196)明显上调(P〈0.05)。结论脂质体介导重组质粒pcDNA3.1-VEGF-C转染入人乳腺癌MCF7细胞中可显著增加VEGF—C表达水平。  相似文献   

5.
目的 观察趋化因子2(CCL2)对MCF-7表达趋化因子5(CCL5)mRNA的影响,并观察CCL2对MCF-7趋化活性的影响.方法 使用不同浓度的CCL2作用于MCF-7细胞,通过实时荧光定量聚合酶链反应(RTFQ-PCR)测定不同时间CCL5 mRNA的表达,并使用趋化小室法检测CCL2作用下MCF-7趋化活性的改变.结果 当外源性CCL2浓度为200μg/L时,MCF-7中CCL5 mRNA相对表达量最大(15.22±2.32)(P<0.01),随着作用时间的延长,CCL5 mRNA表达量增加;MCF-7的趋化活性与CCL2浓度呈正相关,当CCL2浓度为300μg/L时,穿膜细胞数最多(88.00±11.53)(P<0.01);MCF-7的趋化活性与CCL2作用时间呈正相关,当CCL2作用时间为30 h时,穿膜细胞数最多(81.00±9.54)(P<0.05).结论 加入外源性CCL2,MCF-7中CCL2 mRNA表达量增加,MCF-7趋化活性增强.
Abstract:
Objective To observe the effects of chemokine 2 (CCL2) on the expression of chemokine 5 ( CCL5) mRNA and chemotactic activity of MCF-7 cells. Methods MCF-7 cells were treated with different concentrations of CCL2, the expression of CCL5 mRNA was detected by using real-time fluorescence quantitative polymerase chain reaction ( RTFQ-PCR), and the chemotactic activity of MCF-7 was measured by using chemotaxis chamber method. Results When the concentration of exogenous CCL2 was 200 μg/L, the MCF-7 cells expressed the highest CCL5 mRNA (15. 22 ± 2. 3, P <0. 01). With the prolongation of CCL2 action time, the expression levels of CCL5 mRNA were increased. There was a positive correlation between the chemotactic activity of MCF-7 cells and the concentration of CCL2. When the concentration of exogenous CCL2 was 300 μg/L, the number of penetrating cells was the greatest (88.00 ±11. 53, P <0. 01). With the prolongation of CCL2 action time, the chemotactic activity of MCF-7 cells was enhanced. When the action time was 30 h, the number of penetrating cells was the greatest (81.00 ±9. 54, P < 0.05 ). Conclusion Exogenous CCL2 could increase the expression of CCL5 mRNA and the chemotactic activity of MCF-7 cells.  相似文献   

6.
Objective To observe the effects of chemokine 2 (CCL2) on the expression of chemokine 5 ( CCL5) mRNA and chemotactic activity of MCF-7 cells. Methods MCF-7 cells were treated with different concentrations of CCL2, the expression of CCL5 mRNA was detected by using real-time fluorescence quantitative polymerase chain reaction ( RTFQ-PCR), and the chemotactic activity of MCF-7 was measured by using chemotaxis chamber method. Results When the concentration of exogenous CCL2 was 200 μg/L, the MCF-7 cells expressed the highest CCL5 mRNA (15. 22 ± 2. 3, P <0. 01). With the prolongation of CCL2 action time, the expression levels of CCL5 mRNA were increased. There was a positive correlation between the chemotactic activity of MCF-7 cells and the concentration of CCL2. When the concentration of exogenous CCL2 was 300 μg/L, the number of penetrating cells was the greatest (88.00 ±11. 53, P <0. 01). With the prolongation of CCL2 action time, the chemotactic activity of MCF-7 cells was enhanced. When the action time was 30 h, the number of penetrating cells was the greatest (81.00 ±9. 54, P < 0.05 ). Conclusion Exogenous CCL2 could increase the expression of CCL5 mRNA and the chemotactic activity of MCF-7 cells.  相似文献   

7.
Objective To observe the effects of chemokine 2 (CCL2) on the expression of chemokine 5 ( CCL5) mRNA and chemotactic activity of MCF-7 cells. Methods MCF-7 cells were treated with different concentrations of CCL2, the expression of CCL5 mRNA was detected by using real-time fluorescence quantitative polymerase chain reaction ( RTFQ-PCR), and the chemotactic activity of MCF-7 was measured by using chemotaxis chamber method. Results When the concentration of exogenous CCL2 was 200 μg/L, the MCF-7 cells expressed the highest CCL5 mRNA (15. 22 ± 2. 3, P <0. 01). With the prolongation of CCL2 action time, the expression levels of CCL5 mRNA were increased. There was a positive correlation between the chemotactic activity of MCF-7 cells and the concentration of CCL2. When the concentration of exogenous CCL2 was 300 μg/L, the number of penetrating cells was the greatest (88.00 ±11. 53, P <0. 01). With the prolongation of CCL2 action time, the chemotactic activity of MCF-7 cells was enhanced. When the action time was 30 h, the number of penetrating cells was the greatest (81.00 ±9. 54, P < 0.05 ). Conclusion Exogenous CCL2 could increase the expression of CCL5 mRNA and the chemotactic activity of MCF-7 cells.  相似文献   

8.
目的探讨雌激素受体α(ERα)、雌激素受体β(ERβ)、孕激素受体(PR)、人类表皮生长因子受体2(HER2)在乳腺癌组织中的表达及其与TNM分期和腋窝淋巴结状况的关系。方法随机选择我院在2004年12月至2007年12月收治的HER2高表达(+++)51例与无表达(-)53例乳腺浸润性导管癌病例,分别检测乳腺癌组织的ERα、ERβ、PR的表达水平,分析其与TNM分期、腋窝淋巴结转移等临床指标的相关性。结果104例乳腺癌患者,TNM分期为I期的占14.42%,Ⅱ期占62.50%,Ⅲ期占19.23%,Ⅳ期占3.85%;HER2阳性的淋巴结转移率为41.18%,HER2阴性的转移率为47.5%;ERα、ERβ、PR的阳性表达率分别为52.88%、63.46%、73.08%。ERβ与ERα、PR的表达呈正相关(P〈0.01),与HER2的表达负相关(P〈0.01);ERα与PR的表达正相关(P〈0.01),与HER2负相关(P〈0.01),PR与HER2的表达负相关(P〈0.05);ERα、ERβ、PR、HER2的表达与淋巴结转移情况及TNM分期无显著相关性。结论HER2作为乳腺癌预后不良的重要指标与作为乳腺癌预后良好的重要指标ERα、ERβ、PR的表达呈负相关,与TNM分期及腋窝淋巴结转移状态未显示明显相关性。  相似文献   

9.
目的:探讨乳腺癌TAMs/MCF-7细胞共培养体系中血管内皮细胞生长因子(VEGF)过表达对两种细胞中B淋巴细胞瘤-2基因(Bcl-2)表达的影响。方法:应用佛波酯(PMA)及白细胞介素-4(IL-4)体外诱导TAMs细胞,Transwell非接触式共培养TAMs和MCF-7细胞,四甲基偶氮唑蓝(MTT)法检测共培养后MCF-7细胞增殖情况;免疫蛋白印记法(Westernblot)检测TAMs/MCF-7细胞共培养体系中过表达VEGF对两种细胞Bcl-2表达的影响。结果:应用PMA及IL-4体外诱导THP-1成为TAMs细胞,MCF-7与TAMs细胞共培养24、48 h后,细胞增殖活性较对照组分别上升了16.16%和33.99%。TAMs、MCF-7细胞分别加入VEGF及共培养体系上清,两种细胞Bcl-2表达均明显高于对照组,差异有统计学意义(P<0.05)。结论:肿瘤通过分泌VEGF等趋化因子,招募并活化TAMs。通过肿瘤微环境内VEGF/Bcl-2旁分泌环路作用,影响肿瘤的增殖凋亡及进展。  相似文献   

10.
目的:探讨UbcH10在乳腺癌细胞系MCF-7中的作用及机制。方法:使用Ubc日10siRNA干扰乳腺癌细胞系MCF-7中UbcH10的表达,并采用MTT法检测干扰后细胞的增殖变化,同时用流式细胞仪比较干扰后细胞周期的变化。结果:与正常空白对照组及siRNA阴性对照组比较,siUbcH10干扰组细胞增殖明显受抑制,转染后48h,细胞周期中G2/M期细胞比例明显增加(空白对照组9.98%,阴性对照组8.32%,干扰组18.18%)。结论:UbcH10在乳腺癌细胞周期G2/M期中发挥重要作用,抑制MCF-7中UbcH10的表达可明屁抑制乳腺癌细胞增殖,UbcH10有望成为乳腺癌靶向治疗中新的潜在靶点。  相似文献   

11.
为探讨雌激素和三苯氧胺对乳腺癌细胞Akt表达的影响。作者采用Western blot和免疫组化法检测上述两种药物作用下Akt的表达。结果示,三苯氧胺作用后Akt的表达明显高于对照组和雌激素组,以后者的表达为最低。 提示: Akt 的激活状态可能是乳腺癌内分泌治疗中产生耐受的重要机制之一,其有可能作为治疗的新靶点。  相似文献   

12.
Huang Q  Zhu K  Liu CH  Xie F  Xu P  Tang ZG 《中华外科杂志》2011,49(4):324-329
目的 研究抑癌基因WWOX表达对胆管癌RBE细胞生长的影响.方法 采用免疫组化方法检测2005年7月至2010年5月54例胆管癌组织、12例正常胆管组织中WWOX蛋白表达水平.将携有WWOX基因的真核表达载体转染胆管癌细胞系RBE细胞(RBE/WWOX组),筛选稳定转染的细胞并扩增培养,以转染空载质粒(RBE/con组)及未经转染(自然生长组)的RBE细胞作为对照.荧光定量RT-PCR和Western Blot法检测WWOX在RBE细胞中的表达情况;噻唑蓝实验检测转染前后各组细胞增殖活性;FCM法检测各组细胞的凋亡;JC-1染色法检测细胞线粒体膜电位;Transwell小室侵袭实验检测各组肿瘤细胞侵袭力;荧光定量RT-PCR和Western Blot法检测胆管癌细胞bcl-2、bax、FasL、caspase-3表达的变化.结果 WWOX在胆管癌中的表达低于正常胆管组织(P<0.05),蛋白表达的缺失频率为40.7%.建立稳定表达WWOX基因的RBE/WWOX细胞株,mRNA及蛋白表达明显增加.转染后的RBE细胞噻唑蓝吸光度明显下降(P<0.05).与自然生长组和RBE/con组比较,FCM显示RBE/WWOX组细胞的凋亡率明显增高(P<0.01),JC-1显示转染后的线粒体膜电位下降(P<0.01),侵袭实验显示转移至下室滤膜的细胞数明显减少(P<0.01).荧光定量RT-PCR结果显示bcl-2 mRNA表达是自然生长组的0.12倍,bax、caspase-3 mRNA分别是自然生长组的4.72和2.57倍,FasL mRNA的表达无明显变化;Western Blot法检测发现bcl-2蛋白的表达降低,bax、caspase-3蛋白表达升高,FasL无明显变化.结论 抑癌基因WWOX通过诱导胆管癌细胞凋亡发挥抗肿瘤增殖的作用.
Abstract:
Objective To study the effects of anti-oncogene WWOX on cell growth of cholangiocarcinoma. Methods The expression of WWOX protein was detected with immunohistochemical method-SP in 54 patients with cholangiocarcinoma from July 2005 to May 2010 and 12 samples of normal bile duct tissues. The recombinant WWOX eukaryotic expression plasmid was introduced into RBE cells by liposome-mediated transfection and positive cell clones were selected and amplified. The mRNA and protein expressions in RBE cells stably transfected with WWOX were investigated by quantitative RT-PCR and Western Blot before and after transfection. Cell proliferation was tested by MTT, cell apoptosis was assessed by FCM, the alteration of mitochondria membrane potential (△Ψm) was detected by JC-1 staining method,cell invasion was determined by Transwell chamber assay. The expression change of bcl-2, bax, FasL,caspase-3 mRNA and protein was detected by quantitative RT-PCR and Western Blot. Results The expression of WWOX protein was significantly lower in cholangiocarcinoma than that in normal bile duct tissues and loss of WWOX protein expression was found in 40. 7% of cholangiocarcinoma specimens ( P <0.05). RBE cells with stable transfection of WWOX were established. Quantitative RT-PCR showed that the expression of WWOX mRNA was significantly enhanced and Western Blot demonstrated that WWOX protein expression was markedly increased. MTT showed that WWOX gene transfection significantly decreased the proliferation of RBE cells ( P < 0. 05 ). FCM analysis showed that the apoptosis rate after transfection was significantly promoted [( 1.1 ± 0. 6 ) % vs. ( 1.7 ± 0. 5 ) % vs. ( 35.2 ± 4. 4 ) %, P < 0. 01], JC-1 staining method indicated that the experimental group was loss of △Ψm [( 12. 6 ± 1.9 ) % vs. ( 13.6 ± 1.8 ) % vs.(48. 7 ± 2. 9 ) %, P < 0. 01], transwell chamber assay showed that the number of transfected cells that passed the transwell membrane was significantly less than those of control groups ( 77 ± 6 vs. 72 ± 8 vs. 48 ±6, P <0. 01 ). Quantitative RT-PCR and Western blotting showed that the expression of bcl-2 mRNA and protein was markedly decreased and the expression of bax, caspase-3 were significantly increased. There was no significant change in the expression of FasI. Conclusion WWOX exerts its antitumor effect against proliferation through inducing cell apoptosis in cholangiocarcinoma.  相似文献   

13.
目的 研究细胞内Ca^2 浓度[Ca^2 ]i的升高对人乳腺癌MCF—7细胞株中Caspase-3,Bax及Bcl—2表达的影响。方法 在体外培养下,经不同浓度thapsigargin(TG)处理的MCF—7细胞株用荧光指示剂Fura-2/AM于单波长荧光分光光度仪上测定细胞内钙离子浓度。用免疫组织化学方法检测Caspase-3,Bax及Bcl—2的表达。结果 随着细胞内钙离子浓度的提高,Bax表达逐渐增强,Bcl-2表达逐渐减弱,而Caspase-3始终呈阴性表达。结论 细胞内钙离子浓度的升高对MCF—7细胞株可诱发不通过Caspase-3途径的细胞凋亡。  相似文献   

14.
目的:探讨miR-26b在乳腺癌细胞中的表达及其对乳腺癌细胞生物学行为的的影响。方法:比较正常乳腺细胞系MCF-10A及乳腺癌细胞系MCF-7中miR-26b的表达差异。以无处理的MCF-7细胞为空白对照,分别检测MCF-7细胞转染miR-26b模拟物(miR-26b组)、空质粒(阴性对照组)后的miR-26b表达与增殖、迁移、侵袭能力,以及Foxf2的mRNA与蛋白表达的变化。用双荧光素酶报告系统检测miR-26b对MCF-7细胞中Foxf2转录活性的影响。结果:miR-26b在MCF-7细胞中的表达水平明显低于MCF-10A细胞(P0.05)。与空白对照组和阴性对照组比较,miR-26b组miR-26b mRNA表达水平明显升高、细胞增殖迁移、侵袭能力明显降低,Foxf2的mRNA和蛋白表达量均明显下调(P0.05)。转染miR-26b模拟物后,MCF-7细胞中Foxf2-3'UTR的转录活性明显抑制(P0.05)。结论:miR-26b在乳腺癌细胞中表达降低、增加其表达能抑制乳腺癌细胞的恶性生物学行为,机制可能与其下调Foxf2的表达有关。  相似文献   

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目的 观察特异性小干扰RNA(siRNA)技术沉默JMJD2A基因表达对人乳腺癌细胞MCF-7生物学特性的影响.方法 体外化学合成JMJD2A序列特异性双链siRNA,经HiPerFect Transfection Reagent转染人乳腺癌细胞株MCF-7.收集siRNA干扰的细胞,Real time逆转录-聚合酶链反应(RT-PCR)、蛋白印迹分别检测JMJD2A mRNA和蛋白的抑制水平,并采用WST-8法、流式细胞仪测定细胞增殖能力和细胞周期的变化,Transwell小室测定细胞侵袭、迁移能力的变化.结果 JMJD2A siRNA能有效抑制JMJD2A mRNA和蛋白的表达(P<0.05);经siRNA干扰后的细胞,细胞增殖能力显著减低[1.45±0.05比1.73±0.02(48 h A值),P<0.05];Go/G1期细胞百分比明显增加(53.80±1.80比44.84±1.86,P<0.05).S期细胞百分比明显减少(36.55±1.52比47.06±1.26,P<0.05);细胞侵袭、迁移能力明显降低(P<0.05).结论 采用siRNA干扰JMJD2A mRNA和蛋白表达后,能有效逆转乳腺癌细胞的某些恶性生物学特点,表明JMJD2A与乳腺癌的发生、发展及转移有一定关系.  相似文献   

18.
脂氧合酶抑制剂NDGA对乳腺癌MCF-7细胞端粒酶和bcl-2的影响   总被引:1,自引:2,他引:1  
目的:探讨脂氧合酶抑制剂NDGA对乳腺癌MCF-7细胞端粒酶和bcl-2表达的影响。方法:将乳腺癌MCF-7细胞系培养呈对数生长期,分别以0、1、10、100μmol/L的NDGA处理48h后,RT-PCR法检测细胞端粒酶hTERTmRNA的表达水平,流式细胞仪检测细胞bcl-2的表达情况。结果:在1、10、100μmol/L的NDGA作用下,3组hTERTmRNA和bcl-2的表达均显著低于对照组(P〈0.001)。结论:NDGA能够下调MCF-7细胞端粒酶hTERTmRNA及bcl-2的表达,进而抑制细胞增殖,诱导细胞凋亡。  相似文献   

19.
目的构建雌激素受体(ER)亚型ERα/ERβ不同表达状态的人乳腺癌细胞株MCF-7,观察其生物学特性。方法采用RNA干扰技术沉默ERα或ERβ基因表达,获得不同ERα或ERβ表达状态的MCF-7细胞株。运用MTT法、流式细胞术、RT-PCR法、双层软琼脂集落形成实验和体外细胞黏附实验方法检测细胞增殖、凋亡、体外成瘤和黏附能力。结果 构建稳定表达ERαlow/ERβhigh或ERαhigh/ERβlow的MCF-7细胞株。ERα基因沉默后,细胞生长减慢,受阻于G0~G1期,细胞凋亡增加,体外成瘤能力和黏附能力减弱;ERβ基因沉默后,细胞生长加快,S期细胞比例增加,细胞凋亡受到抑制,体外成瘤能力增强,而黏附特性无变化。结论 ERα基因沉默可抑制肿瘤的形成;而ERβ基因沉默可促进肿瘤生长、侵袭和转移。调节ERα/ERβ表达状态可能会成为一种有效的乳腺癌治疗手段。  相似文献   

20.
目的:检测血管内皮生长因子C(vascular endothelial growth factor C,VEGF-C)mRNA和蛋白在人乳腺癌细胞株MCF-7及其耐药株MCF-7/Adr中的定位,定性表达。方法:根据VEGF-C基因序列,设计合成地高辛标记的特异性寡核苷酸探针,运用原位杂交方法检测培养的细胞株MCF-7和MCF-7/Adr中VEGF-C mRNA的表达;并运用免疫组织化学方法检测了两种细胞中VEGF-C蛋白的表达。结果:原位杂交检测到MCF-7和MCF-7/Adr细胞的胞浆中有阳性蓝色颗粒,免疫组化检测发现两种细胞的胞浆中均有阳性棕黄色颗粒,而阴性对照细胞的胞浆中则均无阳性颗粒。结论:人乳腺癌细胞株MCF-7及其耐药株MCF-7/Adr细胞能够转录VEGF-C mRNA并在其细胞浆中翻译合成相应的蛋白。  相似文献   

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