RNA干扰Survivin基因表达对瘢痕疙瘩中成纤维细胞增殖与凋亡的影响

目的 探讨RNA干扰Survivin基因表达对癜痕疙瘩成纤维细胞增殖与凋亡的影响,为瘢痕疙瘩的基因治疗提供实验依据.方法 构建靶向Survivin的siRNA表达质粒,利用Lipofectamine TM 2000转染体外培养瘢痕疙瘩成纤维细胞;采用RT-PCR、Western blot技术检测成纤维细胞中Survivin基因的被干扰情况及Caspase-3基因的表达情况;利用MTT法、流式细胞仪检测成纤维细胞的增殖与凋亡情况.结果 靶向Survivin的序列特异件的siRNA对成纤维细胞中Survivin基因表达的抑制率:在mRNA水平为59.86%和82.57%,在蛋白质水平分别为48.76%和72.53%.Caspase-3基因的表达和活性显著增加(P＜0.01).转染靶向Survivin的RNAi表达质粒对瘢痕疙瘩成纤维细胞增殖的抑制较显著(P＜0.05).Annexin V-FITC/P1双染法显示,干扰Survivin基因表达后成纤维细胞的调亡率高于对照组(56.36%,P＜0.05).结论 所构建的靶向Survivin的RNAi质粒可有效地抑制瘢痕疙瘩成纤维细胞中Survivin基因的表达,通过Survivin基因表达的下调激活Caspas-3基因活性,可显著抑制成纤维细胞的增殖并诱导其凋亡,为瘢痕疙瘩的基因治疗开辟一新途径.     

干扰Livin基因对人胆管癌QBC939细胞增殖影响的研究

目的 研究转染Livin反义寡核苷酸(antisense oligodeoxynucleotide,ASODN)对人胆管癌细胞株QBC939细胞Livin mRNA及Livin蛋白表达以及细胞增殖的影响.方法 设计合成全硫代磷酸化修饰并5'端FITC荧光标记的Livin ASODN.用脂质体介导Livin ASODN转染QBC939细胞,荧光显微镜观察24 h Livin ASODN转染人细胞的情况,并计算转染率.MTT法检测Livin反义寡核苷酸对QBC939细胞增殖的抑制作用.RT-PCR和细胞免疫荧光化学分别检测转染后48 h Livin mRNA表达及Livin蛋白的变化.结果 500 mol/L ASODN转染后24 h可达到最佳的转染效果;转染后60 h,能明显抑制胆管癌细胞的增殖.转染60 h后,RT-PCR及细胞免疫荧光化学检测分别显示Livin mRNA及Livin蛋白表达水平明显低于对照组(P<0.05).结论 脂质体介导转染Livin ASODN能特异性地抑制QBC939细胞中的Livin基因及Livin蛋白表达,抑制胆管癌QBC939细胞的增殖,降低癌细胞活力.

Abstract：

Objective To study the effect of transfection of livin antisense oligodeoxynucleotide (Livin ASODN) on Livin mRNA and Livin protein expression and proliferation of QBC939 cells.Methods Livin ASODN was transfected into cell line QBC939 by LipofectamineTM 2000. Fluorescence microscopy was used to observe the ASODN transfected cells and to calculate the rate of transfection.to measure Livin mRNA and Livin protein expression by RT-PCR and immunohistochemistry and con-focal laser scanning microscopy after the transfection. Changes in cell proliferation were detected by MTT. Results The highest efficiency was at 24 hours after 500 nmol/L Livin ASODN transfection.The results of MTT showed that the inhibition of cell proliferation of QBC939 cells was most obvious at 60 hours after Livin ASODN transfection (P<0. 05). The level of Livin mRNA and Livin protein expression in the ASODN group was obviously lower than that in the control group (P<0. 05).Conclusion The transfection of Livin ASODN inhibited Livin gene and Livin protein expression, and obviously inhibited the proliferation and depressed the vitality of QBC939 cells.     

整合素连接激酶对瘢痕成纤维细胞VEGF的调控作用

目的 探讨整合素连接激酶(intergrin-linked kinase,ILK)在人瘢痕成纤维细胞中的表达及对成纤维细胞VEGF的调控作用.方法 8例人增生性瘢痕标本采用组织块法分离培养瘢痕成纤维细胞,选取第5～6代细胞备用.实验分为3组①对照组:不做任何处理,只用含10%FCS的DMEM培养液同步培养;②空质粒组:用空质粒转染人瘢痕成纤维细胞;③ILK cDNA表达质粒转染组:用ILK cDNA表达质粒转染人瘢痕成纤维细胞.首先通过免疫细胞化学染色法检测ILKcDNA转染前后成纤维细胞ILK、VEGF的表达变化;应用实时荧光定量PCR(RT-PCR)及Western blot检测成纤维细胞ILK、VEGF的mRNA和蛋白水平变化;最后采用酶联免疫吸附试验(ELISA法)检测3组成纤维细胞上清液中的VEGF蛋白含量.结果 免疫细胞化学染色结果显示瘢痕成纤维细胞胞浆中ILK表达阳性,VEGF表达不明显,经ILK cDNA转染细胞后ILK与VEGF表达均增强;RT-PCR显示ILK cDNA转染组VEGF mRNA表达(0.338±0.060)均高于对照组(0.022±0.001)和空质粒组(0.028±0.005,P＜0.05);Western blot结果显示ILK cDNA转染组VEGF蛋白表达(0.819±0.019)显著高于对照组(0.607±0.033)和空质粒组(0.591±0.024,P＜0.05);ELISA法检测ILK cDNA转染组的VEGF蛋白含量高于其他两组(P＜0.05).结论 ILK可以上调VEGF mRNA及蛋白水平,并且促进成纤维细胞分泌VEGF,ILK可能通过提高瘢痕成纤维细胞合成分泌VEGF而促进增生性瘢痕血管生成.

Abstract：

Objective To explore the expression of intergrin-linked kinase (ILK) and its effect on VEGF expression in fibroblasts from human hypertrophic scar. Methods Fibroblasts were isolated from hypertrophic scar of 8 patients and cultured in vitro. Then the cells were divided into three groups: ① Cells were cultured only in DMEM containing 10% FCS in the control group; ② Cells were transfected with empty plasmid in the empty plasmid group; ③ Cells were transfected with plasmid experessing ILKcDNA in the ILK cDNA plasmid transfection group. First, the expression of ILK and VECF was observed by immunocytochemistry before and after ILK cDNA transfection. Second, ILK and VEGF mRNA expression was investigated by real-time PCR ( RT-PCR). Third, the protein expression of ILK and VEGF was detected by Western blot. Finally, the protein level of VEGF in supernatant of fibroblasts was measured by ELISA. Results Before ILK cDNA transfection, the expression of ILK was positive and the VEGF expression was weak in cytoplasm of fibroblasts . After ILK cDNA transfection, both the expression of ILK and VEGF was enhanced. The level of VEGF mRNA was significantly higher in ILK cDNA transfection group (0.338 ±0.060) than that in control group (0.022 ±0.001) and empty plasmid group (0.028 ± 0. 005 , P ±0. 05 ). The level of VEGF protein was significantly higher in ILK cDNA transfection group (0. 819 ±0. 019) than that in control group (0. 607 ±0. 033) and empty plasmid group (0. 591 ±0. 024, P ＜0. 05). Secretion of VEGF increased remarkably in ILK cDNA transfection group comparing with the other two groups (P＜0. 05). Conclusions ILK could up-regulate the VEGF mRNA and protein level in human scar fibroblasts. It may play an important role in the angiogenesis in hypertrophic scar.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

Objective To construct the siRNA eukaryotic expression vector targeting Survivin gene, and investigate the chemotherapy sensitivity of pancreatic cancer line Panc-1 treated by gemcitabine. Methods The siRNA eukaryotic expression vector targeting Survivin gene was constructed. Panc-1 cells were transfected with negative control vector or siRNA vector and selected by G418, and the cell growth curve was drawn. The expression of Survivin mRNA and protein was detected by RT-PCR and Western blot respectively. Panc-1 cells or transfected cells were treated with gemcitabine for 24 h,and then the growth inhibition rate was measured by MTT assay, and cell apeptosis rate was measured by flow cytometry. Results The result of endonuclease digestion and DNA sequencing revealed that the recombinant plasmid psiRNA-Survivin was constructed successfully. Survivin mRNA and protein levels were reduced by 79.2% and 83.6% respectively in stably transfected Panc-1 cells as compared with control group, and the cell growth curve was much smoother, and the growth inhibition rate [ ( 24.6±4.5 ) % / (38.7±5.2 ) % ] and apoptosis rate of these cells [ ( 16.7±2.5 ) %/( 26.8±3.4 ) % ] were significantly increased after treatment by gemcitabine (P < 0.05 ). Conclusion The constructed siRNA eukaryotie expression vector targeting Survivin could decrease the Survivin expression,inhibit the growth of Panc-1 cells significantly,and increase the chemotherapy sensitivity to gemcitabine.     

RNA干扰双位点抑制Survivin基因诱导雄激素非依赖性前列腺癌PC-3细胞凋亡

目的研究采用RNA干扰技术抑制雄激素非依赖性前列腺癌PC-3细胞中Survivin 基因的表达对PC-3细胞增殖及凋亡的影响。方法设计2条靶向Survivin mRNA的Survivin shRNA,克隆至同一质粒载体,并鉴定分析;质粒转染PC-3细胞,绘制细胞生长曲线;并于转染48 h 后进行Survivin基因蛋白表达及细胞凋亡检测。结果酶切鉴定、测序分析证实负载双片段Sur- vivin shRNA的质粒载体构建成功。转染PC-3细胞后,细胞生长曲线示实验组PC-3细胞增殖明显受抑制;转染后48 h．实验组、阴性对照组、空白对照组Survivin蛋白表达强度分别为(4．62± O．84)％、(38．83±7．96)％和(40．98±3．83)％,实验组与两对照组相比差异均有显著性意义(P< 0．05);转染48 h后PC-3细胞凋亡率开始增加。结论负载双片段Survivin shRNA的质粒载体转染PC-3细胞后能明显抑制PC-3细胞增殖,抑制PC-3细胞Survivin蛋白表达,并能诱导PC-3细胞凋亡。但诱导PC-3细胞凋亡最明显的时机需要进一步观察。     

Survivin基因干扰RNA对骨肉瘤MG-63细胞系增殖和凋亡的影响

[目的]观察Survivin基因siRNA表达载体对骨肉瘤细胞增殖和凋亡的影响。[方法]体外构建Survivin shRNA表达载体pSilence2．1-neo-Survivin，转染骨肉瘤细胞系MG-63，筛选稳定表达的克隆，倒置显微镜观察各组细胞形态学变化，RT-PCR、Weston-blot方法检测转染后Survivin mRNA及蛋白的表达，噻唑蓝（MTT）法、克隆形成实验检测细胞的增殖情况，吖啶橙荧光染色法观察细胞凋亡情况。[结果]转染后MG-63细胞Survivin基因mRNA水平和蛋白表达显著下降，其抑制率分别为85．08％和81．14％；细胞增殖受到显著抑制，培养48h后与空白组比较，抑制率达63．4l％；吖啶橙染色显示转染组细胞出现明显核碎裂等凋亡改变，转染组凋亡率为24．54％。[结论]靶向Survivin基因的siRNA表达载体可以显著抑制骨肉瘤细胞增殖，促进细胞凋亡。     

小分子干扰RNA抑制肺癌细胞Survivin表达对凋亡和顺铂耐药性的影响

目的 观察应用小分子干扰RNA(siRNA)技术抑制肺癌A549细胞中Survivin表达对细胞凋亡和顺铂耐药性的影响.方法 设计、合成特异性抑制Survivin表达的siRNA,转染肺癌A549细胞48 h后,检测Survivin基因mRNA表达量以及肺癌细胞凋亡率和对顺铂耐药性变化.结果 A549细胞转染Survivin特异siRNA后,Survivin/β-actin基因mRNA表达比例1.17±0.25下降至0.41±0.18,抑制率65.10%;细胞凋亡率由2.67%上升至32.33%;顺铂半数抑制浓度(ICSO)由6.37 ms/L降低至2.42 ms/L.结论 通过siRNA特异性抑制肺癌A549细胞中Survivin基因表达可增加凋亡,逆转顺铂耐药.     

siRNA沉默survivin基因对肺癌细胞凋亡的影响

目的观察siRNA（Small interference RNA,siRNA）介导survivin基因对肺癌细胞凋亡作用。方法设计、合成针对survivin的siRNA并构建相应载体,转染对数生长期肺癌细胞A549,对比阴性对照组和空白对照组;半定量RT-PCR检测survivin mRNA的表达,MTT法检测细胞生长,流式细胞仪检测肺癌细胞的凋亡。结果转染siRNA组survivin mRNA表达明显低于阴性对照组和空白对照组（P〈0.05）。MTT法检测各组细胞生长曲线阴性对照组与空白对照组相比,转染后24,48,96小时及1周时细胞生长未受影响,siRNA组在转染后24,48小时细胞生长未受明显影响,而96小时及一周时明显抑制。转染siRNA组的细胞的凋亡率与阴性对照组与空白对照组相比显著增加（14.94%±1.60%vs 3.23%±0.46%,4.22%±0.34%,P〈0.05）。结论本实验提示siRNA沉默survivin基因能促进肺癌细胞的凋亡,survivin siRNA基因治疗有可能成为肺癌治疗的新靶点。     

表观沉默蛋白Bmil在结直肠癌组织中的表达及其对结直肠癌细胞增殖和凋亡的影响

目的研究人结直肠癌中表观沉默蛋白Bmil表达与结直肠癌病理特征的关系,探讨Bmil蛋白对结直肠癌细胞增殖凋亡的影响。方法应用免疫组织化学技术检测85例结直肠癌组织及其邻近正常肠黏膜中Bmil蛋白表达：用BmilsiRNA转染结肠癌细胞系SW480．运用MTY法检测细胞增殖状态：流式细胞仪观察其对细胞凋亡的影响．Westemblot检测Bmil及Bcl-2蛋白的表达。结果结直肠癌组织中Bmil蛋白表达的阳性率为56．5％（48／85）．明显高于正常肠黏膜[17．6％（15／85）]（P〈0．05）;其阳性表达与肿瘤分化程度、分期及淋巴结转移有关（P〈0．05）。SW480转染BmilsiRNA后,细胞增殖受到抑制,凋亡明显;转染24、48和72h后,其抑制率分别为13．1％、16．5％和18．3％．细胞凋亡率分别为15．7％、45．6％和40．2％：同时,Bmil表达水平在转染48h后下降,Bcl-2表达水平也降低（P〈0．01）。结论结直肠癌中Bmil表达与肿瘤病理学特征关系密切,阻断Bmil表达可抑制结肠癌细胞的增殖．促进其凋亡。     

靶向Survivin的siRNA联合吉西他滨抑制胰腺癌细胞增殖

目的 构建靶向Survivin基因的siRNA真核表达载体,观察其对吉西他滨化疗抑制胰腺癌Pane-1细胞增殖的影响.方法 构建靶向Survivin基因的siRNA真核表达载体psiRNA-Survivin,行酶切和测序鉴定.用重组质粒转染Pane-1细胞并筛选稳定转染的细胞株,绘制细胞生长曲线.采用逆转录.聚合酶链反应(RT-PCR)、Western blot检测Survivin的mRNA和蛋白表达变化.以吉西他滨分别作用于对照组和转染组Panc-1细胞24 h,噻唑蓝(MTY)比色法检测细胞的增殖,流式细胞仪检测细胞的凋亡.结果 酶切和测序鉴定表明,成功构建了psiRNA-Survivin重组质粒.重组质粒稳定转染胰腺癌细胞株后,Survivin的mRNA和蛋白表达分别下调了79.2%和83.6%(P<0.05),生长曲线明显变平缓,并能显著增强吉西他滨对Panc-1细胞的增殖抑制[(24.6±4.5)%/(38.7±5.2)%]和凋亡诱导作用[(16.7±2.5)%/(26.8±3.4)%,P<0.05).结论 构建Survivin的siRNA表达载体可明显下调Survivin的表达,抑制Panc-1细胞增殖,并能提高细胞对吉西他滨的化疗敏感性.     

反义pEGFP-C1-Survivin对骨肉瘤细胞生物学行为的影响

目的 观察Survivin反义核酸载体对人骨肉瘤细胞株MG-63生物学行为的抑制效应,并探讨其机制.方法 MTY检测转染前后MG-63细胞增殖抑制率的变化,Boyden小室体外侵袭实验测定转染前后侵袭能力变化.逆转录-聚合酶链反应(RT-PCR)检测转染前后Ang-2基因mRNA表达的变化.结果 噻唑蓝(MTT)检测显示转染后骨肉瘤细胞增殖明显受抑制,转染组抑制率达到23.4%,与各对照组之间差异有统计学意义(P<0.01),脂质体组、空质粒组和空白组之间差异无统计学意义(P>0.05).RT-PCR分析显示转染组MG-63中Ang-2基因mRNA的表达较转染前明显下降,与其他组之间差异有统计学意义(P<0.01),而另3组之间差异无统计学意义(P>0.05).Boyden小室体外侵袭实验测定显示转染组侵袭百分数为17.9%,与其他各组间差异有统计学意义(P<0.01).结论 Survivin反义核酸可以显著抑制人骨肉瘤细胞株MG-63的增殖、侵袭能力,部分逆转其恶性表型,这可能与其下调Ang-2的表达有关.     

小干扰RNA对肾癌786-O细胞Survivin表达及其增殖的抑制作用

目的 观察小分子干扰RNA(siRNA)对人肾癌细胞Survivin基因表达及其增殖、凋亡的影响.方法 设计、合成1对Survivin编码基因序列特异的siRNA,用脂质体包裹转染人肾癌786-O细胞,分不同浓度组(10、50、100 nmol/L),采用逆转录.聚合酶链反应(RT-PCR)、Western blot技术检测Survivin mRNA及蛋白表达,噻唑蓝(MTT)比色法检测细胞增殖,免疫组织化学TUNEL法榆测细胞凋亡.结果 Survivin siRNA能有效下调Survivin基因表达水平,抑制了细胞生长,促进其凋亡.并呈剂量依赖性(3组的mRNA 88.3%、62.4%、43.8%,蛋白87.7%、62.4%、46.5%,增殖抑制率11.6%、41.2%、57.5%,凋亡率14.2%、29.4%、38.1%),差异有统计学意义(P<0.05).结论 Survivin基因siRNA能抑制人肾癌786-O细胞Survivin基因表达,进而抑制其增殖,促进其凋亡.     

小干扰RNA对肾癌786-O细胞Survivin表达及其增殖的抑制作用

目的 观察小分子干扰RNA(siRNA)对人肾癌细胞Survivin基因表达及其增殖、凋亡的影响.方法 设计、合成1对Survivin编码基因序列特异的siRNA,用脂质体包裹转染人肾癌786-O细胞,分不同浓度组(10、50、100 nmol/L),采用逆转录.聚合酶链反应(RT-PCR)、Western blot技术检测Survivin mRNA及蛋白表达,噻唑蓝(MTT)比色法检测细胞增殖,免疫组织化学TUNEL法榆测细胞凋亡.结果 Survivin siRNA能有效下调Survivin基因表达水平,抑制了细胞生长,促进其凋亡.并呈剂量依赖性(3组的mRNA 88.3%、62.4%、43.8%,蛋白87.7%、62.4%、46.5%,增殖抑制率11.6%、41.2%、57.5%,凋亡率14.2%、29.4%、38.1%),差异有统计学意义(P<0.05).结论 Survivin基因siRNA能抑制人肾癌786-O细胞Survivin基因表达,进而抑制其增殖,促进其凋亡.     

小干扰RNA对肾癌786-O细胞Survivin表达及其增殖的抑制作用

目的 观察小分子干扰RNA(siRNA)对人肾癌细胞Survivin基因表达及其增殖、凋亡的影响.方法 设计、合成1对Survivin编码基因序列特异的siRNA,用脂质体包裹转染人肾癌786-O细胞,分不同浓度组(10、50、100 nmol/L),采用逆转录.聚合酶链反应(RT-PCR)、Western blot技术检测Survivin mRNA及蛋白表达,噻唑蓝(MTT)比色法检测细胞增殖,免疫组织化学TUNEL法榆测细胞凋亡.结果 Survivin siRNA能有效下调Survivin基因表达水平,抑制了细胞生长,促进其凋亡.并呈剂量依赖性(3组的mRNA 88.3%、62.4%、43.8%,蛋白87.7%、62.4%、46.5%,增殖抑制率11.6%、41.2%、57.5%,凋亡率14.2%、29.4%、38.1%),差异有统计学意义(P<0.05).结论 Survivin基因siRNA能抑制人肾癌786-O细胞Survivin基因表达,进而抑制其增殖,促进其凋亡.