芹菜素对喉癌Hep-2细胞增殖、迁移与侵袭的影响

目的探讨芹菜素对喉癌Hep-2细胞增殖、迁移与侵袭的影响及可能机制。方法 MTT法检测不同浓度的芹菜素(0、20、40、80μmol/L)对喉癌Hep-2细胞增殖的影响。40μmol/L芹菜素处理Hep-2细胞48h后,Transwell实验检测Hep-2细胞体外迁移和侵袭能力变化;实时PCR和Western blot检测Hep-2细胞Wnt1、β-catenin、环氧合酶2(COX2)与基质金属蛋白酶2(MMP-2)的蛋白与mRNA的表达水平。结果芹菜素抑制喉癌Hep-2细胞增殖,并呈时间浓度依赖性;40μmol/L芹菜素处理Hep-2细胞48h能够有效抑制Hep-2细胞的迁移和侵袭能力,降低Wnt1、β-catenin、COX2与MMP-2 mRNA相对表达量和蛋白表达水平。结论芹菜素抑制喉癌细胞的增殖、迁移和侵袭能力与抑制喉癌Hep-2细胞中Wnt/β-catenin信号通路相关。     

小檗碱对喉癌Hep-2细胞增殖与凋亡的影响及可能机制

目的探讨小檗碱对喉癌Hep-2细胞增殖与凋亡的影响及可能机制。方法免疫组织化学方法与Western blot方法检测喉癌组织及癌旁正常组织中环氧合酶-2(COX-2)与细胞周期调节蛋白CyclinB1的表达。MTT方法检测不同质量浓度小檗碱(0,5,10,20mg/L)对喉癌Hep-2细胞增殖的影响;流式细胞仪检测小檗碱(0,20 mg/L)对喉癌Hep-2细胞凋亡的影响。Western blot方法检测小檗碱(0,20 mg/L)作用喉癌Hep-2细胞24h后COX-2与CyclinB1的表达变化。结果 COX-2与CyclinB1在喉癌组织的阳性表达率及平均光密度值显著高于癌旁正常组织(P0.01)。小檗碱抑制喉癌Hep-2细胞增殖,并呈时间浓度依赖性;给予20 mg/L小檗碱作用后,喉癌Hep-2细胞凋亡率明显增加,喉癌Hep-2细胞中的COX-2与CyclinB1表达水平明显低于未加药组(P0.01)。结论小檗碱抑制喉癌Hep-2细胞的增殖并促进凋亡,下调COX-2与CyclinB1的表达可能是其作用机制之一。     

miR-137对肾癌GRC-1细胞增殖与凋亡的影响

目的 研究miR-137对肾癌GRC-1细胞增殖与凋亡的影响.方法 采用miR-137模拟物转染至肾癌GRC-1细胞,实验分为未转染组(未进行miR-137模拟物转染)、miR-137对照组(转染随机序列)、miR-137转染组(进行miR-137模拟物转染).荧光定量PCR检测各组转染后48h细胞中miR-137表达水平,应用噻唑蓝细胞增殖试验(MTT)、流式细胞检测技术与免疫荧光评价miR-137对肾癌GRC-1细胞增殖和凋亡的影响.结果 转染miR-137模拟物48h后,荧光定量PCR检测发现未转染组、miR-137对照组及miR-137转染组GRC-1细胞中miR-137的相对表达量依次为(24.43±2.03)％、(26.57±2.55)％、和(73.30±3.29)％,差异有统计学意义(P＜0.05).MTT细胞增殖实验与流式细胞仪检测结果显示,与未转染组、miR-137对照组相比,miR-137转染组转染48h后肾癌GRC-1细胞的增殖率显著降低,凋亡率显著升高,差异有统计学意义(P＜0.05),而未转染组、miR-137对照组肾癌GRC-1细胞的增殖率、凋亡率比较差异无统计学意义(P＞0.02).结论 miR-137可明显抑制肾癌GRC-1细胞增殖和促进其凋亡,故有望成为肾癌基因治疗的新靶点.     

沉默Slug对喉癌Hep-2细胞增殖和细胞侵袭的影响

目的探讨沉默喉癌细胞株Hep-2中Slug基因对细胞增殖和细胞侵袭的影响。方法将靶向Slug基因si RNA转染至喉癌Hep-2细胞,Real time PCR和Western blot方法分别检测转染后Slug m RNA和蛋白表达变化,通过CCK-8法测定Hep-2细胞增殖能力的变化,流式细胞术检测细胞周期及transwell法检测细胞侵袭力。结果转染Slug-si RNA的实验组Hep-2细胞内slug m RNA和蛋白表达水平与对照组相比明显降低(0.05),Hep-2细胞增殖能力和侵袭能力显著降低(0.05)。结论沉默Slug基因可以抑制喉癌Hep-2细胞的增殖和侵袭能力,提示Slug基因可能参与喉癌发生发展。     

miR-27a对结肠癌SW480细胞增殖、迁移、侵袭及凋亡的影响及可能机制

目的 探讨miR-27a对结肠癌SW480细胞增殖、凋亡、侵袭及迁移的影响及可能机制。方法 qRT-PCR方法检测人结肠癌细胞株SW480与人正常结肠黏膜上皮细胞NCM460中miR-27a的表达水平。体外培养SW480细胞,将SW480细胞随机分为空白对照组(不进行任何处理)、miR-27a抑制剂组（转染miR-27a inhibitor）与阴性对照组（转染miR-27a inhibitor NC）,采用脂质体法进行转染,实时荧光定量PCR方法验证转染效率。采用四甲基偶氮唑蓝（MTT）法检测SW480细胞增殖;Transwell实验检测SW480细胞侵袭与迁移;流式细胞术检测SW480细胞凋亡;Western blot法检测转染后叉头框蛋白O1(FOXO1)、组织金属蛋白酶抑制剂2(TIMP-2)、泛素连接酶FBW7的表达。结果 miR-27a在SW480细胞中的表达水平显著高于NCM460细胞（P<0.01）。转染miR-27a抑制剂后,SW480细胞中miR-27a的表达水平明显降低,转染成功。抑制miR-27a表达后,SW480细胞的增殖、迁移与侵袭能力显著降低,凋亡率显...     

熊果酸对肺癌A549细胞增殖、凋亡与侵袭的影响及可能机制

目的 探讨熊果酸对肺癌A549细胞增殖、凋亡与侵袭的影响及可能机制.方法 体外培养A549细胞,分别以0μmol/L、10μmol/L、20μmol/L、40μmol/L熊果酸处理48h后,平板克隆实验与MTT实验检测肺癌A549细胞的增殖能力;流式细胞术检测肺癌A549细胞的凋亡率;Transwell实验检测A549...     

臭灵丹中黄酮类化合物对人喉癌细胞Hep-2凋亡的影响及机制

目的:探讨中药臭灵丹中黄酮类化合物诱导人喉癌细胞Hep-2凋亡的机制。方法:MTT法检测分离自臭灵丹的黄酮类化合物3,5-二羟基-6,7,3',4'-四甲氧基黄酮(HTMF)对2种正常细胞的毒性和对3种肿瘤细胞株的增殖抑制作用;采用流式细胞仪检测化合物对Hep-2细胞凋亡率的影响;Western blotting法检测凋亡蛋白caspase-3和caspase-9的变化。结果:HTMF显著抑制Hep-2细胞的增殖并呈浓度、时间双重依赖性关系,但对正常细胞Vero和EVC304的毒性较小,对A549和HepG2细胞抑制作用小。流式细胞仪检测结果显示HTMF对Hep-2细胞有促凋亡作用并呈明显的量效、时效关系。Western blotting结果显示HTMF可诱导Hep-2细胞中caspase-3和caspase-9蛋白的活化,并呈时间依赖性关系。结论:HTMF对人喉癌细胞Hep-2的生长有显著的抑制作用,其机制可能通过激活caspase-9进而活化caspase-3诱导Hep-2细胞凋亡。     

Runx3对人肝癌HepG2细胞增殖、凋亡及侵袭的影响

目的探讨siRNA干扰Runx3对人肝癌Hep G2细胞增殖、凋亡和侵袭能力的影响。方法以人肝癌Hep G2细胞为研究对象,构建Runx3-siRNA,转染入细胞。将细胞分为对照组、脂质体组、NC-siRNA组和Runx3-siRNA组。用RT-PCR法检测Runx3 mRNA表达,用Western blot检测Runx3蛋白表达。用MTT法、流式细胞法和Transwell小室法观察Runx3对Hep G2细胞增殖、凋亡和侵袭的影响。结果 Runx3-siRNA可抑制Hep G2细胞的增殖(P0.05);Runx3-siRNA可促进Hep G2细胞凋亡(P0.05);Runx3-siRNA可抑制Hep G2细胞的侵袭(P0.05)。结论Runx3基因在肝癌的发生发展中发挥一定的促进作用,有可能成为肝癌治疗的新靶点。     

miR-219-5p对非小细胞肺癌细胞增殖、凋亡与侵袭的影响及其机制

目的:探索miR-219-5p对非小细胞肺癌(non-small cell lung cancer,NSCLC)细胞增殖、凋亡及侵袭的影响,并探讨其机制.方法:采用RT-PCR检测miR-219-5p在NSCLC细胞系H1299,A549,H1975及正常肺上皮细胞系BEAS-2B中的表达.将NSCLC细胞系H1299分成对照组和miR-219-5p组,用Lipofectamine 2000分别转染miR-219-5p scramble和miR-219-5p mimics,采用MTT法、流式细胞术及Transwell实验分别检测比较两组细胞增殖、凋亡及侵袭能力,Western印迹测定表皮生长因子受体(epidermal growth factor receptor,EGFR)及裂解型多聚腺苷二磷酸核糖聚合酶(poly ADP ribose polymerase,PARP)在两组细胞中的表达.结果:miR-219-5p在H1299,A549和H1975细胞系中的表达量均低于BEAS-2B,差异有统计学意义(P<0.05);MTT实验显示在48,72,96及120 h,miR-219-5p组OD490 nm值显著低于对照组,差异有统计学意义(P<0.05);miR-219-5p组细胞凋亡率显著高于对照组(13.33%±1.20%vs 3.43%±0.12%),差异有统计学意义(P<0.01);miR-219-5p组侵袭细胞数显著少于对照组(67.5±9.9 vs 189.5±16.7),差异有统计学意义(P<0.05);miR-219-5p组EGFR蛋白相对表达量为0.35±0.07,miR-219-5p组EGFR蛋白相对表达量显著低于对照组(1.0),差异有统计学意义(P<0.01);miR-219-5p组裂解型PARP蛋白相对表达量显著高于对照组(2.74±0.17 vs 1.0),差异有统计学意义(P<0.01).结论:miR-219-5p可抑制NSCLC的细胞增殖和侵袭并促进其凋亡,其机制可能与下调EGFR及上调PARP的表达有关.     

miR-1231对结肠癌干细胞增殖、凋亡和侵袭的影响

BACKGROUND:Previous studies have found that miR-1231 is down-regulated in colon cancer stem cells (CCSCs), but the effect of miR-1231 on CCSCs remains unclear. OBJECTIVE:To explore the effect of miR-1231 on the proliferation, apoptosis and invasion of CCSCs (CD133⁺CD44⁺). METHODS: CD133⁺CD44⁺ cells and CD133^-CD44^- cells were separated from SW1116 cells by immunomagnetic bead separation. The expression level of miR-1231 in CD133⁺CD44⁺ and CD133^-CD44^- cells was detected by qRT-PCR. miR-1231-overexpressing CD133⁺CD44⁺ cells were transfected with miR-1231 mimics or miR-control by lipofection transfection. The effects of miR-1231 on CD133⁺CD44⁺ cell proliferation, apoptosis and invasion were investigated by MTT, flow cytometry and Transwell assays, respectively. In addition, the expression levels of Ki67, Bax, Bcl-2, MMP-2 and MMP-9 protein in miR-1231-overexpressing CD133+CD44+ cells and control cells were detected by western blot. RESULTS AND CONCLUSION:CD133⁺CD44⁺ and CD133^-CD44^- cells were obtained by the immunomagnetic bead separation. The expression level of miR-1231 in CD133⁺CD44⁺ cells was significantly lower than that in CD133^-CD44^- cells. miR-1231 suppressed CD133⁺CD44⁺ cell proliferation and invasion, but promoted the apoptosis in these cells. Western blot analysis showed that miR-1231-overexpressing CD133⁺CD44⁺ cells had obvious decreases in Ki67, Bcl-2, MMP-2 and MMP-9 protein expression and a significant increase in Bax protein expression compared with control cells. All these results further confirm that miR-1231 inhibits the proliferation and invasion but promotes the apoptosis in CD133⁺CD44⁺ cells. These findings suggest that miR-1231 can be a suppressor of CCSCs, which offers a novel potential therapeutic target for CCSCs and colon cancer.     

吲哚美辛对人喉癌Hep-2细胞系侵袭力的影响

目的: 通过体外实验的方法探讨非甾体类抗炎药吲哚美辛对人喉癌Hep-2细胞系侵袭能力的影响。方法:Hep-2细胞经吲哚美辛作用后,撤药培养,绘制生长曲线,并用软琼脂集落形成实验检测肿瘤细胞非锚着生长能力,琼脂糖滴法检测肿瘤细胞移动能力,单层细胞侵袭实验计算肿瘤侵袭指数。结果:吲哚美辛作用后的Hep-2细胞软琼脂集落形成数目减少,细胞移动能力下降,单层细胞侵袭指数降低。结论:吲哚美辛能抑制人喉癌Hep-2细胞系的侵袭性。     

CXCR4 silencing inhibits invasion and migration of human laryngeal cancer Hep-2 cells

CXCR4 has been reported in various types of human cancer, which is associated with cancer progression and metastasis. However, the investigation of CXCR4 in laryngeal cancer is extremely rare. In the present study, we used lentivirus-mediated shRNA targeting CXCR4 to silenced CXCR4 expression in Hep-2 cells and evaluated the effect of long-term suppression of CXCR4 on Hep-2 growth and metastasis. The Cell proliferation was analyzed by MTS assay, and the invasion and metastasis potentials were analyzed using wound healing and transwell assays, respectively. Our results showed that lentivirus-mediated shRNA effectively infected Hep-2 cells and suppressed CXCR4 expression, and inhibited cell growth of Hep-2 cells. Cell invasion and apoptosis were decreased concomitantly with the reduction in CXCR4 protein expression. Further analysis revealed that CXCR4 silencing caused the reducion of CXCR4, CXCL12, TIMP2, VEGF and MMP9, and the phosphorylation levels of IκB, AKT and MAPK, and also decreased the activity of NF-κB. These results suggested that knockdown of CXCR4 inhibits the invasion and metastasis of Hep-2 through PI3K/AKT and MAPK signaling pathways, by decreasing NF-κB activities to down-regulate VEGF, TIMP-2 and MMP-9 expression. These data demonstrate that the inhibition of CXCR4 may be an effective interventional therapeutic strategy in laryngeal cancer.     

食欲素A对人肝癌细胞Hep G2增殖和凋亡的影响及机制

目的研究食欲素A(orexin A)对人肝癌细胞Hep G2增殖和凋亡的影响,及其可能作用机制。方法以不同浓度的orexin A干预Hep G2细胞24h,MTT法检测细胞的增殖能力,筛选最适的orexin A作用浓度。使用食欲素受体1选择性拮抗剂SB408124(10μM)预处理细胞1 h,然后用最适浓度的orexin A干预细胞24h,实验设置为:正常对照组、溶剂对照组、orexin A组、SB408124+orexin A组。MTT法检测细胞的增殖情况,流式细胞术检测细胞周期和细胞凋亡率,Hoechst染色观察细胞的形态变化,Western blot检测Bax、Bcl-2、Cytochrome c和Cleaved-caspase-3蛋白的表达。结果 Orexin A以剂量依赖性方式明显抑制Hep G2细胞的生长,最适宜浓度为0.5μM,细胞G0/G1期百分比(72.50%±1.32%)明显高于S期(19.6%9±1.15%)。Orexin A促进Hep G2细胞凋亡,细胞凋亡率显著升高(0.01)。Orexin A显著上调Bax和Cleaved-caspase-3表达水平,下调Bcl-2和线粒体Cytochrome c表达水平。SB408124的干预能够减小orexin A对Hep G2细胞的影响。结论 Orexin A通过食欲素受体1抑制Hep G2细胞增殖并诱导其凋亡。     

microRNA-137 modulates pancreatic cancer cells tumor growth,invasion and sensitivity to chemotherapy

Background: We intended to investigate the role of microRNA 137 (miR-137) in regulating pancreatic cancer cells’ growth in vitro and tumor development in vivo. Methods: QTR-PCR was used to examine the expression of miR-137 in pancreatic cancer cell lines and tumor cells from human patients. Lentivirual vector containing miR-137 mimic was used to overexpress miR-137 in PANC-1 and MIA PaCa-2 cells. The effects of overexpressing miR-137 on pancreatic cancer cell invasion and chemo-sensitivity to 5-fluorouracil (5-FU) were examined by cell migration and survival essays in vitro. The molecular target of miR-137, pleiotropic growth factor (PTN), was down-regulated by siRNA to examine its effects on cancer cell invasion. MIA PaCa-2 cells with endogenously overexpressed miR-137 were transplanted into null mice to examine tumor growth in vivo. Results: We found miR-137 was markedly underexpressed in both pancreatic cancer cell lines and tumor cells from patients. In cancer cells, transfection of lentivirus containing miR-137 mimic was able to markedly upregulate endogenous expression of miR-137, inhibited cancer cell invasion and increased sensitivities to chemotherapy reagent 5-FU. PTN was significantly down-regulated by overexpressing miR-137 in pancreatic cancer cells, and knocking down PTN was effective to rescue the reduced cancer cell invasion ability caused by miR-137 overexpression. More importantly, overexpressing miR-137 led to significant inhibition on tumor formation, including reductions in tumor weight and tumor size in vivo. Conclusion: Our study demonstrated that miR-137 played an important role in pancreatic cancer development. It may become a new therapeutic target for gene therapy in patients suffered from pancreatic cancer.