共查询到17条相似文献,搜索用时 156 毫秒
1.
2.
3.
目的:通过研究CLC-3 在结直肠组织中的表达,探讨CLC-3 对结直肠癌细胞株SW480、SW620 的细胞生存率、侵袭转移能力的影响及其潜在的机制。方法:采用RT-PCR 方法测定不同分期结直肠癌组织和正常结直肠组织中CLC-3 的mRNA 表达水平。运用CLC-3 阻断剂DIDS、NPPB阻断SW480、SW620 细胞的CLC-3 表达后,采用CCK-8 法实验检测细胞生存率,细胞侵袭实验检测细胞侵袭转移情况;并采用免疫印迹法测定阻断CLC-3 表达后SW480、SW620 细胞Wnt/ β -catenin 信号通路相关蛋白表达。结果:结直肠癌组织中CLC-3 mRNA 表达水平高于结直肠炎黏膜组织和正常结直肠组织(P < 0.05),且CLC-3 mRNA 表达和结直肠分期相关。抑制CLC-3 表达后,SW480、SW620 细胞的生存率和侵袭转移能力降低(P < 0.05),且β -catenin、C-myc 、cyclinD 1、Ki-67、survivin表达降低(P < 0.05)。 结论:CLC-3 高表达与结直肠的发生发展有潜在联系,其机制可能与Wnt/ β -catenin 有关,为CLC-3 作为治疗结直肠癌的潜在新靶点提供实验基础。 相似文献
4.
背景与目的:对上皮-间质转化(epithelial-mesenchymal transition,EMT)的研究虽有大量文献报道,但研究数据仍有争议.本研究旨在探讨淋巴结转移的结直肠癌与结直肠癌细胞系SW480、SW620的EMT特征差异.方法:Real-time RT-PCR检测结直肠癌细胞系SW480和SW620 E-cadherin和vimentin的mRNA表达:免疫组织化学法检测30例配对结直肠癌及其转移淋巴结的石蜡组织标本中E-cadherin和vimentin的表达,HE染色观察30例配对结直肠癌及其淋巴结转移癌组织形态以及SW480和SW620的细胞形态.结果:SW480与SW620中E-cadherin和vimentin的mRNA表达差异有统计学意义(P=0.037),均以后者为高;E-cadherin和vimentin在结直肠癌与其淋巴结转移癌组织中的表达差异无统计学意义(P=0.108;P=0.660).部分淋巴结转移癌中E-cadherin的表达高于结直肠癌(4/30),且vimentin表达比结直肠癌弱,甚至表达缺失(6/30);结直肠癌与其淋巴结转移癌组织具有相似的形态学特征;SW480和SW620两者形态类似.结论:结直肠癌对比其淋巴结转移癌、SW480对比SW620发现EMT特征无显著差异,推测是由于淋巴结转移癌和SW620发生TEMT. 相似文献
5.
目的:建立一种荧光可视化显像且稳定过表达缺氧诱导因子-1α(hypoxia-inducible factor-1α,HIF-1α)的裸鼠结直肠癌移植瘤模型。方法:对不同的人结直癌细胞系(SW480、SW620、LOVO及HCT116细胞)用缺氧诱导剂Co Cl2处理,根据HIF-1α被诱导表达的情况选择合适的靶细胞;将HIF-1α的c DNA序列克隆至慢病毒表达质粒p LV-TRC-EGFP,构建p LVHIF1α-EGFP慢病毒表达质粒,并包装过表达HIF-1α的慢病毒颗粒Lenti-HIF1α-EGFP。将Lenti-HIF1α-EGFP感染SW480细胞,嘌呤霉素筛选稳定过表达HIF-1α的细胞株SW480HIF-1α,Western blotting检测SW480HIF-1α细胞内HIF-1α及其下游蛋白VEGF、M1型丙酮酸激酶(pyruvate kinase expression M1,PKM1)的表达情况,Transwell实验检测其迁移能力。裸鼠腹腔注射SW480HIF-1α建立结直肠癌移植瘤模型,倒置荧光显微镜观察裸鼠腹腔移植瘤结节。结果:常氧条件下4种结直肠癌细胞均不表达HIF-1α,经Co Cl2诱导后,除SW480细胞系以外的细胞均可被诱导表达HIF-1α,故选择SW480细胞作为研究靶细胞。成功构建稳定过表达HIF-1α的细胞株SW480HIF-1α,SW480HIF-1α细胞内HIF-1α、VEGF和PKM1的表达水平均高于野生型SW480细胞,其迁移能力较野生型SW480细胞显著增强[观察视野内迁移细胞数:(250±11)vs(50±5)个,P<0.01]。SW480HIF-1α组裸鼠肠壁形成肿瘤结节数量显著多于SW480组[(15±4)vs(4±1)个,P<0.05]。结论:成功建立了高表达HIF-1α的荧光可视化裸鼠移植瘤模型,为进一步的相关功能学研究以及药物筛选提供条件。 相似文献
6.
目的: 探究白介素22(interleukin-22,IL-22)对结直肠癌细胞增殖的影响,并阐明其信号通路机制。 方法: Real-time PCR检测结直肠癌细胞SW480和SW620中IL-22受体1(IL-22 receptor 1, IL-22R1 )mRNA的表达;采用不同质量浓度IL-22(0、1、5、10 ng/ml) 处理结直肠癌细胞,MTT法及克隆形成实验检测IL-22对SW480和SW620细胞增殖的影响;IL-22处理SW480和SW620细胞不同时间后,采用Western blotting检测其STAT3、AKT、ERK、JNK、P38蛋白磷酸化的情况;观察特异性STAT3磷酸化抑制剂LLL12处理是否影响IL-22诱导的结直肠癌细胞的促增殖效应。 结果: IL-22R1 mRNA在结直肠癌SW480、SW620细胞中均有表达。IL-22剂量依赖性地促进SW480和SW620细胞增殖,10 ng/ml IL-22作用后,SW480与SW620细胞增殖倍数均明显增高\[(5.18±0.212) vs (2.64±0.27),(8.14±0.61) vs (6.08±0.096);均P<001\];且IL-22可提高SW480与SW620细胞克隆形成能力,细胞克隆数明显多于空白对照组\[(1 680.67±124.05) vs (730±64.29),(2 668±116.37) vs (1 294±171.61);均P<0.01\]。Western blotting证实IL-22能显著活化STAT3通路,而对AKT、ERK、JNK、P-38通路影响不明显;STAT3抑制剂LLL12处理后,IL-22对SW480和SW620细胞的促增殖效应明显减弱。 结论: IL-22通过活化STAT3信号通路促进结直肠癌细胞SW480和SW620的增殖。 相似文献
7.
8.
9.
目的 研究microRNA-7(miR-7)和5氟尿嘧啶(5-FU)联合对5-FU耐药结直肠癌(SW620/5-FU)细胞增殖、凋亡的影响,探讨miR-7表达对结直肠癌细胞5-FU敏感性的调控机制。方法 收集2019年5月—2021年7月手术切除的结直肠癌组织和癌旁组织;培养结直肠癌细胞系(HCT116、SW1116、DLD1、SW620)和正常结肠上皮细胞(NCM460),培养SW620细胞并构建5-FU耐药结直肠癌细胞(SW620/5-FU)。用RT-qPCR检测细胞和组织中miR-7的表达量。对SW620细胞和SW620/5-FU细胞均瞬时转染miR-7 mimic、miR-7 inhibitor和vector,分为miR-7 vector组(空载体组)、miR-7 mimic组(过表达组)和miR-7 inhibitor组(抑制组),以及与5-FU联合处理的miR-7 mimic+5-FU组和control组(空细胞组)。采用CCK-8法检测细胞增殖和5-FU半数抑制浓度(IC50),流式细胞术检测各组细胞凋亡情况,Western blot检测各组的cle... 相似文献
10.
目的:探讨泛素特异性蛋白酶7(ubiquitin specific protease 7,USP7)在结直肠癌组织中的表达及其通过调控Wnt/PCP通路对结直肠癌细胞SW480增殖、凋亡的影响和机制研究。方法:免疫组织化学法检测USP7在结直肠癌组织中的表达;qRT-PCR和Western blotting检测USP7在结直肠癌组织和结直肠癌细胞系中的表达;qRT-PCR和Western blotting检测沉默USP7在SW480细胞中的表达;细胞克隆形成实验检测SW480细胞增殖能力;Transwell迁移实验检测SW480细胞迁移能力;流式细胞术检测SW480细胞的凋亡情况;Western blotting检测Wnt/PCP通路相关蛋白的表达。结果:USP7在结直肠癌组织和结直肠癌细胞系中高表达(P<0.05);沉默USP7使SW480细胞中USP7的表达降低(P<0.001),细胞的增殖和迁移能力下降(P<0.001),细胞凋亡率增加(P<0.001);与shNC组相比,沉默USP7使Wnt7a蛋白和RhoA蛋白的表达水平显著下调(P<0.001,P<0.001),JNK蛋白磷酸化程度显著降低(P<0.01)。结论:USP7在结直肠癌组织和结直肠癌细胞系中高表达。沉默USP7抑制SW480细胞增殖、迁移并诱导细胞凋亡,可能与Wnt/PCP通路有关。 相似文献
11.
Hyaluronan facilitates invasion of colon carcinoma cells in vitro via interaction with CD44 总被引:8,自引:0,他引:8
Kim HR Wheeler MA Wilson CM Iida J Eng D Simpson MA McCarthy JB Bullard KM 《Cancer research》2004,64(13):4569-4576
Hyaluronan (HA) and its biosynthetic enzymes, HA synthases (HAS1, 2, and 3) are thought to participate in cancer progression. We have shown previously that HA production and HAS3 expression are increased in metastatic colon carcinoma cells (SW620) when compared with cells isolated from a primary tumor (SW480). Because invasion of the extracellular matrix is a fundamental event in tumor growth and metastasis, we hypothesized that SW620 cells would show greater invasive capability than SW480 cells, that invasion is HA dependent, and that HA mediates invasion via interaction with a cell-surface receptor. Invasion into artificial basement membrane (Matrigel) was assessed in vitro. To assess HA functionality, HAS expression was inhibited in SW620 cells by transfection with antisense HAS constructs. Decreased HA secretion and retention in the transfectants were confirmed using competitive binding and particle exclusion assays. SW620 cells demonstrated greater invasion through Matrigel than did SW480 cells. Antisense transfection decreased Matrigel invasion by SW620 cells by >60%; addition of exogenous HA restored invasion. Because the cell-surface HA receptor CD44 has been implicated in cancer progression, HA-CD44 interaction was then inhibited by incubation with an anti-CD44 antibody. Anti-CD44 antibody impaired invasion into Matrigel by 95%. Taken together, these data suggest that pericellular HA is critical for colon carcinoma cell invasion and that this invasive capability is dependent on interaction with CD44. 相似文献
12.
目的:探讨长链非编码 RNA(lncRNA)RUNX1-IT1在结直肠癌中的表达及其对结直肠癌细胞侵袭和迁移的影响机制。方法:收集2017年1月—2019年1月于河北北方学院附属第一医院进行根治性手术切除的结直肠癌组织标本62例及其相应的癌旁正常组织标本,采用荧光定量PCR(qPCR)法检测结直肠癌组织和其相应的癌旁组织中lncRNA RUNX1-IT1的表达。并培养人结直肠癌细胞系(SW480、SW620、HCT-116)和人正常结直肠上皮细胞系(FHC),qPCR检测细胞系中 lncRNA RUNX1-IT1和 miR-21的表达水平,选择最适细胞系用于后续实验。通过上调或下调SW480细胞中lncRNA RUNX1-IT1和miR-21的表达后,采用qPCR检测lncRNA RUNX1-IT1和miR-21的表达水平,双荧光素酶报告基因实验验证lncRNA RUNX1-IT1和miR-21的靶向关系,Transwell实验检测SW480细胞侵袭和迁移能力。结果:qPCR检测结果显示,与癌旁正常组织比较,lncRNA RUNX1-IT1在结直肠癌组织中表达降低(P<0.05),而miR-21在结直肠癌组织中表达升高(P<0.05),且lncRNA RUNX1-IT1与miR-21在结直肠癌组织中的表达呈负相关(r=-0.275,P=0.031)。与正常结直肠 FHC细胞相比,lncRNA RUNX1-IT1在 3种结直肠癌细胞系中的表达水平均显著降低(均为P<0.05),而miR-21均显著升高(均为P<0.05),且SW480细胞最明显,故后续采用SW480细胞系进行实验。双荧光素酶报告基因实验证实lncRNA RUNX1-IT1靶向调节miR-21的表达;与对照组相比,过表达lncRNA RUNX1-IT1可抑制SW480细胞侵袭和迁移能力(P<0.05);抑制 miR-21表达可抑制 SW480细胞侵袭和迁移能力(P<0.05);上调 miR-21表达可逆转过表达 lncRNARUNX1-IT1对 SW480细胞侵袭和迁移的抑制作用(P<0.05)。结论:LncRNA RUNX1-IT1在结直肠癌中表达下调,lncRNARUNX1-IT1通过靶向miR-21调控SW480细胞侵袭和迁移。 相似文献
13.
Tissue factor (TF) is believed to play an important role in tissue repair, inflammation, angiogenesis, and tumor metastasis. Protease-activated receptors (PARs) are widely expressed on various cells including tumor cells and associated with many pathological mechanisms. In the present study, the expression of TF and PAR1, PAR2 on human colon cancer cells (SW620 and SW480) was investigated and their functional roles on the behavior of tumor cells were evaluated. It was demonstrated that SW620 and SW480 cells expressed TF at antigen, activity and mRNA levels. However, the highly metastatic cell line SW620 showed slightly higher TF expression than the low metastatic cell line SW480. The PAR2 antigen was strongly expressed on the membrane of SW620 cells, but not on SW480 cells. The PAR1 antigen was not observed in SW620 or SW480 cells, while PAR1 and PAR2 mRNA was detected in SW620 and SW480 cells. The migratory potential of SW620 was stronger than that of SW480 seen in Boyden chambers. PAR2 agonist (SLIGKV-NH2) and factor VIIa significantly stimulated SW620 cell proliferation, migratory activity, and interleukin 8 (IL-8) secretion compared to control. The stimulating effects of factor VIIa could be inhibited by anti-TF and anti-PAR2 but not anti-PAR1 antibodies. In summary, this study demonstrates that TF and PAR2 are strongly expressed on highly metastatic colonic tumor cells and are closely associated with the proliferation and migration of the cells. TF may elucidate its roles in colonic cancer invasion and metastasis via PAR2 pathway. 相似文献
14.
15.
目的 探讨TRPM8调节结肠癌细胞免疫逃逸的机制。方法 采用qRT-PCR和Western blot检测结肠癌细胞系SW620和正常人结肠上皮细胞系CCD 841 CoN中TRPM8的表达水平。将干涉和过表达TRPM8载体TRPM8 siRNA和pcDNA3.1-TRPM8转染至SW620细胞,并设置相应对照组(Control siRNA组和pcDNA3.1组),用CCK-8、集落形成实验和流式细胞术检测细胞增殖和凋亡,酶标仪检测Calcineurin活性,Western blot检测Calcineurin-NFATc3信号通路相关蛋白的表达。采用CCK-8检测CD8+T细胞与SW620细胞共孵育的细胞活力,Western blot检测Calcineurin特异性抑制剂FK506处理SW620细胞后NFATc3和PD-L1蛋白表达。结果 与CCD 841 CoN细胞相比,TRPM8 mRNA和蛋白在SW620细胞中的表达均增加(P<0.01)。与Control siRNA组比较,干涉 TRPM8表达后SW620细胞活力、细胞增殖能力、Calcineurin活性,以及TRPM8、PD-L1和 NFATc3蛋白表达均降低(P<0.01),而细胞凋亡率和p-NFATc3蛋白表达均升高(P<0.01);过表达TRPM8可增强细胞活力、细胞增殖能力和Calcineurin活性,上调TRPM8、PD-L1及NFATc3蛋白表达(P<0.01),下调p-NFATc3蛋白表达(P=0.002)。CD8+ T细胞与干涉TRPM8表达的SW620细胞共孵育后总细胞活力降低(P=0.002),而与过表达SW620细胞共孵育后总细胞活力增强(P=0.005)。FK506处理可抑制SW620细胞Calcineurin活性,下调NFATc3、PD-L1蛋白表达(P<0.01)。结论 TRPM8过表达可能通过激活Calcineurin-NFATc3信号通路而促进PD-L1表达,从而增强结肠癌细胞免疫逃逸能力,促进结肠癌细胞增殖。 相似文献
16.
The leukocyte protein L-plastin induces proliferation, invasion and loss of E-cadherin expression in colon cancer cells 总被引:2,自引:0,他引:2
Foran E McWilliam P Kelleher D Croke DT Long A 《International journal of cancer. Journal international du cancer》2006,118(8):2098-2104
L-plastin, a gene that codes for an actin-bundling protein, is upregulated in the metastatic colon cancer cell line SW620, when compared to its premetastatic counterpart SW480. The aim of our study was to characterise the effect of L-plastin overexpression on SW480 cells in the context of the acquisition of a metastatic phenotype. SW480 cell lines overexpressing L-plastin were established (SW480-LPL). Analysis of these cell lines revealed significantly higher rates of proliferation and invasion than the control cell line (SW480-Ctrl). In addition, the expression of E-cadherin was lost from SW480-LPL cells. Treatment of SW480-LPL cells with cytochalasin B, an inhibitor of endocytosis, attenuated the loss of E-cadherin expression in these cells. The association of L-plastin overexpression with an increased rate of proliferation and invasion, and loss of E-cadherin expression in the SW480 colon cancer cell line indicates that L-plastin plays an important mechanistic role in colorectal cancer metastasis (supplementary material for this article can be found on the International Journal of Cancer website at http://www.interscience.wiley.com/jpages/0020-7136/suppmat/index.html). 相似文献
17.
目的 探讨结肠癌细胞来源外泌体在中性粒细胞和结肠癌细胞间的作用及其可能的作用机制.方法 体外培养中性粒细胞和结肠癌细胞SW480,分别用sh?NC和sh?HMGB1转染SW480细胞后分离相应外泌体SW480?exo、sh?NC?exo、sh?HMGB1?exo.各组外泌体分别处理中性粒细胞,同时设置PBS组;提取各组... 相似文献