AQP1通过Wnt通路促进乳腺癌MCF-7细胞增殖、迁移与侵袭

目的:探讨过表达水通道蛋白1（aquaporin 1,AQP1）基因对人乳腺癌细胞MCF-7增殖、迁移、侵袭能力的影响,分析其对Wnt通路的调控作用。方法:构建和包装pBabe-puro-AQP1逆转录病毒载体,建立稳定过表达AQP1基因的MCF-7细胞。细胞免疫荧光染色法检测外源性AQP1在MCF-7细胞内的定位,实时荧光定量PCR（qRT-PCR）和Western blot检测AQP1 mRNA及蛋白表达变化;采用CCK-8法检测细胞的增殖活性;流式细胞法检测细胞周期;划痕实验检测细胞迁移能力;Transwell法检测细胞的侵袭能力;基因表达谱芯片、Western blot检测转染后Wnt细胞通路相关基因表达改变。结果:稳定过表达AQP1后MCF-7细胞增殖、迁移、侵袭能力显著增加,差异有统计学意义（P＜0.001）。基因表达谱芯片结果显示,过表达AQP1后22个差异表达基因富集于Wnt细胞信号通路,mRNAs表达明显增强（P＜0.000 1）,Wnt细胞通路关键基因β-catenin及下游靶基因细胞周期蛋白D1(Cyclin D1)、C-Myc蛋白表达也显著增加。结论:AQP1可能通过激活Wnt信号通路促进MCF-7细胞增殖、迁移与侵袭。     

下调胰岛素样生长因子-1表达对人胃癌细胞增殖和侵袭及迁移的影响

目的 胰岛素样生长因子1(insulin like growth factor-1,IGF-1)作为体内重要的促有丝分裂原分子,可能与恶性肿瘤的转化及转移相关,但是目前有关IGF-1的表达与胃癌细胞迁移、侵袭的研究较少.本研究旨在研究IGF-1在胃癌组织中的表达,并探讨其表达对人胃癌HGC-27细胞体外增殖及侵袭、迁移能力的影响.方法 检测承德医学院附属医院2014-05-10-2016-05-10胃癌手术切除78例胃癌组织、30例癌旁正常组织及体外不同胃癌细胞系中IGF-1的表达情况.针对IGF-1基因序列,设计发夹RNA(short-hairpin RNA,shRNA)干扰序列并构建干扰载体,转染胃癌HGC-27细胞.荧光实时定量PCR及蛋白质印迹技术分别检测转染干扰载体后HGC-27细胞中IGF-1的表达情况.细胞增殖-毒性检测试剂盒(cell counting kit 8,CCK-8)、划痕实验及Transwell侵袭实验分别检测下调IGF-1对体外细胞HGC-27增殖及迁移、侵袭能力的影响.结果 免疫组织化学法检测显示,低分化胃癌组织中IGF-1阳性表达率为76％(29/38),高、中分化为53％(21/40),癌旁正常组织为27％(8/30).不同胃癌组织与癌旁组织中IGF-1的表达差异有统计学意义,x2=16.66,P＜0.01.并且其表达与胃癌的病理分期(x2=7.430,P=0.007)、组织分化(x2=4.618,P=0.032)等病理因素相关.体外不同胃癌细胞系中IGF-1均呈现高表达,但差异无统计学意义.利用干扰载体能够有效下调胃癌细胞HGC-27中IGF-1在mRNA及蛋白质水平的表达.与空载体转染对照组和野生型HGC-27细胞比较,IGF-1表达下调明显抑制胃癌细胞的体外增殖和侵袭、迁移能力.结论 IGF 1在体内胃癌组织及体外胃癌细胞中高表达,下调IGF-1的表达能够抑制人胃癌细胞HGC-27的增殖及体外侵袭、迁移能力.     

MiR-144 suppresses proliferation,invasion, and migration of breast cancer cells through inhibiting CEP55

Objective: The study aimed to investigate the molecular mechanism of miR-144 and CEP55 as well as the influence of their interaction on the cell proliferation, migration, invasion, cell cycle and cell apoptosis in breast cancer.

Methods: In this study, The Cancer Genome Atlas (TCGA, https://tcga-data.nci.nih.gov/) database was used for microarray analysis. The expressions of miR-144 and CEP55 in 40 adjacent tissues and 36 tumor tissues were examined by western blot, qRT-PCR and immunohistochemistry. The target relationship between miR-144 and CEP55 was predicted and confirmed by TargetScan and luciferase reporter assay. The cell proliferation, cell cycle and cell apoptosis in different groups were detected by MTT and flow cytometry assays, while wound healing and transwell assays were used for the cell migration and invasion tests. The regulatory effects of miR-144 and CEP55 on breast tumor were verified through nude mouse model in vivo experiment.

Results: MiR-144 was down-regulated in breast cancerous tissues and cells, whereas CEP55 expression was up-regulated in breast cancerous tissues. Moreover, there existed a target relationship between miR-144 and CEP55 and negative correlation on their expressions. MiR-144 could down-regulate CEP55 expression, thereby inhibiting proliferation, invasion, migration, retarding cell cycle and accelerating cell apoptosis. MiR-144 could inhibit cell progression through down-regulating CEP55 in vivo.

Conclusion: MiR-144 suppressed cell proliferation, migration, invasion and induced cell cycle arrest and cell apoptosis by repressing CEP55. This might provide a promising therapy for clinical treatment.     

下调ERp57抑制食管癌细胞增殖、迁移和侵袭

目的:分析内质网驻留蛋白57(ERp57)在食管鳞癌组织中的表达情况以及下调ERp57对食管癌细胞TE-1生物学功能的影响。方法:GEPIA数据库分析食管癌中ERp57的表达;通过荧光定量PCR和Western blot检测临床食管癌标本及细胞株中ERp57的表达;利用shRNA沉默TE-1细胞内ERp57后,通过CCK8检测细胞增殖、TUNEL检测细胞凋亡、划痕检测细胞迁移、Transwell检测细胞侵袭。结果:食管癌组织中ERp57的mRNA和蛋白的表达水平均高于癌旁组织(P<0.05),食管癌细胞中ERp57的mRNA及蛋白的表达高于食管上皮细胞(P<0.05)。沉默ERp57使TE-1细胞的增殖能力减弱、凋亡比例增加,并减弱了TE-1细胞的迁移及侵袭能力。结论:沉默ERp57表达能够抑制食管癌细胞TE-1的增殖、迁移、侵袭,可为食管癌研究提供理论依据。     

FSIP1促进乳腺癌细胞迁移和侵袭并导致患者不良预后

目的 探讨乳腺癌组织中纤维鞘相互作用蛋白1(FSIP1)表达对乳腺癌细胞侵袭和迁移能力的影响及其与乳腺癌患者预后的关系,从而为乳腺癌的诊断和治疗提供一定的理论参考。方法 收集2004年1月—2018年12月于哈尔滨医科大学附属肿瘤医院确诊的404例乳腺癌患者的乳腺组织样本和病例资料,对收集的乳腺癌患者资料进行回顾性分析并采用Kaplan-Meier方法绘制生存曲线,采用免疫组织化学方法分析FSIP1在乳腺癌和癌旁组织中的表达情况,取乳腺癌细胞系MCF-7、MDA-MB-231、MDA-MB-435、SK-BR-3、T-47D及正常乳腺上皮细胞(HMECs)MCF-10A进行细胞培养,采用CRISPR/CAS9技术敲除乳腺癌细胞系MDA-MB-231和SK-BR-3中的FSIP1基因,通过Western blot实验检测各乳腺癌细胞系中FSIP1蛋白的表达情况并对FSIP1基因敲除结果进行检测,通过细胞迁移和侵袭实验评估FSIP1蛋白敲除对乳腺癌细胞迁移和侵袭能力的影响。结果 与正常乳腺上皮细胞(MCF-10A)相比,乳腺癌细胞系MCF-7、MDA-MB-231、MDA-MB-435、S...     

miR-107靶向FoxM1对鼻咽癌细胞生长和侵袭及迁移影响

目的microRNA与鼻咽癌(nasopharyngeal carcinoma,NPC)发生发展密切相关,但miR-107在鼻咽癌中的作用机制仍不清楚。本研究检测miR-107在鼻咽癌组织中的表达水平,并初步探讨其对鼻咽癌细胞增殖、迁移和侵袭影响的分子机制。方法收集2013-02-02-2013-12-24于佛山市第一人民医院经病理活检确诊的86例NPC组织和42例慢性鼻咽炎组织。采用原位杂交技术检测组织中miR-107的表达。分析miR-107表达与鼻咽癌患者临床特征及5年生存率的关系。双荧光素酶实验检测miR-107和人叉头框蛋白M1(forkhead box M1,FoxM1)在鼻咽癌细胞中的相互作用。在鼻咽癌细胞系CNE-2中转染miR-107 mimics和mimics NC,并设立mock对照组,采用实时荧光定量PCR法检测FoxM1 mRNA的表达量,蛋白质印迹实验检测FoxM1蛋白的表达量。然后通过CCK8、划痕和Transwell小室法检测鼻咽癌细胞的增殖、迁移和侵袭能力。结果miR-107在鼻咽癌组织中的阳性表达率(15.12%,13/86)低于慢性鼻咽炎组织(83.33%,35/42),差异有统计学意义,χ^2=96.37,P<0.001;与T分期(χ^2=24.816,P<0.001)和N分期(χ^2=29.368,P<0.001)有关联,且鼻咽癌miR-107阳性患者的5年生存率高于miR-107阴性组,χ^2=6.380,P=0.043。miR-107靶向调控FoxM1的3′UTR,降低了荧光素酶的表达活性,F=363.600,P<0.001。miR-107 mimics组FoxM1mRNA(F=267.600,P<0.001)和蛋白表达水平(F=101.300,P<0.001)低于mimics NC和mock组。与mimics NC和mock组相比,miR-107 mimics组细胞的增殖(F=1192.000,P<0.001)和迁移、侵袭(F=210.600,P<0.001)能力均降低。结论miR-107在鼻咽癌患者中低表达,通过靶向抑制FoxM1的表达而抑制鼻咽癌细胞的增殖、迁移和侵袭能力。     

circNEIL3 通过靶向miR-4784 调控乳腺癌MDA-MB-231 细胞的增殖、迁移和侵袭

目的：研究环状RNA nei 样DNA糖化酶3（circNEIL3）和微小RNA（miR）-4784 对乳腺癌细胞MDA-MB-231 的增殖、迁移和侵袭的影响。方法：收集2018 年1月至2019 年12月在济南市中西医结合医院经组织病理诊断为乳腺癌并行手术切除的45 例乳腺癌患者的癌组织和配对癌旁组织,qPCR 法检测乳腺癌组织、癌旁组织中circNEIL3 和miR-4784 的相对水平。将circNEIL3 的小干扰RNA（si-circNEIL3）、miR-4784 模拟物、si-circNEIL3+miR-4784 抑制物分别转染MDA-MB-231 细胞,采用CCK-8法、平板克隆实验、划痕愈合实验、Transwell 实验检测circNEIL3和miR-4784 表达对细胞活力、克隆形成、迁移和侵袭的影响。双荧光素酶报告基因实验、RNA免疫沉淀（RIP）和RNA pull-down 实验检测circNEIL3和miR-4784 之间相互作用。结果：乳腺癌组织中circNEIL3呈高表达（P<0.05）,miR-4784 呈低表达（P<0.05）。干扰circNEIL3显著降低MDA-MB-231 细胞活力、克隆形成数、划痕愈合率以及侵袭数（均P<0.05）。过表达miR-4784 显著降低MDA-MB-231 细胞活力、克隆形成数、划痕愈合率以及侵袭数（均P<0.05）。双荧光素酶报告基因实验、RIP 和 RNA pull-down 实验均证实circNEIL3 与miR-4784 可直接结合,干扰circNEIL3 能明显上调miR-4784表达（P<0.05）,过表达circNEIL3 能明显下调 miR-4784 表达（P<0.05）。抑制miR-4784 表达部分逆转干扰circNEIL3对MDA-MB-231 细胞活力、克隆形成、迁移和侵袭的抑制作用（P<0.05）。结论：干扰circNEIL3通过靶向上调miR-4784表达抑制MDA-MB-231细胞的增殖、迁移和侵袭。     

ZEB1过表达对乳腺浸润性导管癌细胞增殖与转移潜能影响

目的乳腺浸润性导管癌(breast invasive carcinoma,BRCA)在乳腺癌中最常见,比导管原位癌恶性程度更高,预后和治疗效果不乐观。本研究通过检测BRCA细胞中E盒锌指结合蛋白(zinc finger E-box binding homeobox 1,ZEB1)的表达,分析其过表达对人BRCA细胞体外增殖、迁移和侵袭能力的影响,探讨其与BRCA发生发展的关系。方法通过蛋白质印迹法检测BRCA细胞中ZEB1蛋白水平的表达情况,另构建过表达ZEB1BRCA细胞并通过蛋白质印迹法确认其过表达水平。采用细胞计数盒8(cell counting kit 8,CCK8)法和Transwell实验分别检测过表达ZEB1对BRCA细胞增殖、迁移和侵袭的影响。结果蛋白质印迹法结果显示,ZEB1在BRCA细胞HCC38和BT474中的表达分别为0.28±0.02和0.22±0.01,低于正常乳腺上皮细胞(0.90±0.06),差异有统计学意义,t值分别为23.56和18.33,均P<0.001。CCK8实验结果显示,HCC38细胞ZEB1过表达组和Vector组经2因素分析结果显示F组别=6.610,P组别=0.042;F时间=9.236,P时间=0.963;F组别×时间=26.287,P组别×时间<0.001。这表明处理药物的主效应差异有统计学意义,而且药物与时间存在协同作用。ZEB1过表达组在第4天和第5天时的细胞增殖活性低于Vector组,且差异有统计学意义(t4d=4.370,P4d=0.001;t5d=5.627,P5d=0.001);BT474细胞ZEB1过表达组和Vector组经2因素分析结果显示F组别=6.737,P组别=0.039;F时间=14.619,P时间=0.921;F组别×时间=267.723,P组别×时间<0.001。这表明处理药物的主效应差异有统计学意义,而且药物与时间存在协同作用。BT474细胞ZEB1过表达组在第4天和第5天时,细胞增殖活性低于Vector组,差异有统计学意义(t4d=3.682,P4d=0.001;t5d=6.819,P5d<0.001)。Transwell迁移和侵袭实验发现,在HCC38细胞中过表达ZEB1,细胞迁移数目为41±7.94,少于Vector组82.33±7.09,t=4.28,P=0.003;在BT474细胞中过表达ZEB1,细胞迁移数目为44.33±6.11,也少于对应的Vector组89.33±5.69,t=5.51,P=0.006;过表达ZEB1的HCC38细胞,细胞侵袭数目为22.33±4.04,少于对照66.33±8.74,t=2.41,P=0.001;过表达ZEB1的BT474细胞,细胞侵袭数目为21.33±2.52,少于Vector组62.67±6.66,t=3.07,P=0.004。结论ZEB1在BRCA细胞中低表达,过表达ZEB1抑制BRCA细胞的增殖、迁移和侵袭能力。     

miR-199a通过下调ITGA3抑制卵巢癌细胞的增殖、迁移与侵袭

目的:探讨miR-199a对卵巢癌细胞增殖、迁移与侵袭的作用及机制.方法:采用qRT-PCR和Western blot分别检测卵巢癌组织和细胞中miR-199a和整合素α3(integrin alpha 3,ITGA3)的表达.将miR-199a mimic转染入CAR3细胞后,双荧光素酶报告基因实验、Western ...     

Effects of methylglyoxal and glyoxalase I inhibition on breast cancer cells proliferation,invasion, and apoptosis through modulation of MAPKs,MMP9, and Bcl-2

Emerging evidence indicates that methylglyoxal (MG) can inhibit tumorigenesis. Glyoxalase I (GLOI), a MG degradation enzyme, is implicated in the progression of human malignancies. However, little is known about the roles of MG and GLOI in breast cancer. Our purpose was to investigate the anticancer effects of MG and inhibition of GLOI on breast cancer cells and the underlying mechanisms of these effects. Our findings demonstrate that cell viability, migration, invasion, colony formation, and tubule formation were significantly restrained by addition of MG or inhibition of GLOI, while apoptosis was significantly increased. Furthermore, the expression of p-JNK, p-ERK, and p-p38 was markedly upregulated by addition of MG or inhibition of GLOI, whereas MMP-9 and Bcl-2 expression levels were dramatically decreased. These effects were augmented by combined treatment with MG and inhibition of GLOI. Collectively, these data indicate that MG or inhibition of GLOI induces anticancer effects in breast cancer cells and that these effects are potentiated by combination of the 2. These effects were modulated by activation of the MAPK family and downregulation of Bcl-2 and MMP-9. These findings may provide a new approach for the treatment of breast cancer.     

miR-33a通过下调lumican基因抑制结肠癌细胞的侵袭和迁移

目的:探讨不同级别结肠癌中miR-33a和基膜聚糖(lumican)基因的表达情况,同时研究miR-33a对于结肠癌细胞侵袭和迁移的影响.方法:收集2015年1月至2016年1月新乡医学院第一附属医院肿瘤科收治的141例结肠癌患者,Western blotting和qPCR检测不同级别结肠癌组织中miR-33a和lumican的表达情况.使用miR-33a mimic转染人结肠癌细胞SW480,qPCR检测miR-33a mimic转染后细胞miR-33a和lumican mRNA的表达变化情况,使用Transwell侵袭实验检测miR-33a对人结肠癌细胞SW480侵袭能力的影响,使用划痕实验检测miR-33a对人结肠癌细胞SW480迁移能力的影响.裸鼠皮下成瘤实验检测miR-33a对结肠癌移植瘤生长以及裸鼠生存的影响.结果:随着结肠癌肿瘤级别的增加,miR-33a表达明显降低,而lumican表达水平明显增加;随着结肠癌病理分期和分级的增加,miR-33a表达逐渐降低;淋巴结转移的结肠癌组织中miR-33a的表达明显降低.转染miR-33a-mimic可以明显上调miR-33a的表达,上调miR-33a可以显著降低lumican蛋白表达水平、可以抑制结肠癌细胞的侵袭和迁移能力.miR-33a-mimic组荷瘤裸鼠肿瘤增长幅度明显减慢,而荷瘤裸鼠生存期明显延长.结论:miR-33a与结肠癌分期、分级以及是否有淋巴结转移有关,miR-33a可通过下调lumican抑制结肠癌细胞的侵袭和迁移.     

CPNE7通过上皮间质转化影响胃癌细胞增殖、迁移和侵袭

目的:探讨CPNE7在胃癌组织和细胞中的表达及影响胃癌细胞增殖、迁移和侵袭的机制。方法:基于生物信息学数据库GEPIA 从转录水平分析CPNE7在胃癌及癌旁正常组织中的表达差异。qRT-PCR法检测CPNE7在3种胃癌细胞系(AGS、MKN-45、HGC-27)和胃黏膜正常上皮细胞(GES-1)中的表达,选择表达量相对较高的AGS细胞作为后续实验细胞。通过慢病毒转染AGS细胞敲减CPNE7的表达,根据不同处理分为RNAi-vector组、RNAi-1组、RNAi-2组、RNAi-3组,qRT-PCR、Western blot验证细胞转染效率,选择敲减效率最有效的RNAi-1(实验组)和RNAi-vector(对照组)进行后续实验。采用CCK-8法检测细胞活力,EdU和克隆形成实验检测细胞增殖和克隆形成能力,划痕愈合实验和Transwell实验检测细胞迁移与侵袭能力,Western blot检测细胞凋亡相关蛋白(Caspase3、Caspase7、Caspase9、Bax、Bcl-2)及上皮间质转化（epithelial-mesenchymal transition,EMT)相关蛋白（E-cadherin、N-cadherin、Vimentin)的表达水平。结果:CPNE7在胃癌组织中的表达明显高于正常组织(P＜0.05)。与正常胃黏膜上皮细胞(GES-1)相比较,CPNE7在胃癌细胞中明显高表达(P＜0.05),在AGS胃癌细胞中CPNE7相对表达量最高（P＜0.001)。与RNAi-vector组相比较,敲减CPNE7可抑制胃癌细胞的增殖、迁移和侵袭（P＜0.05)。与RNAi-vector组相比较,敲减CPNE7可上调细胞凋亡相关蛋白Caspase3、Caspase7、Caspase9、Bax的表达,下调Bcl-2的表达（P＜0.05)。与RNAi-vector组相比较,敲减CPNE7可增加上皮标志物蛋白(E-cadherin)的表达水平(P＜0.01),降低间质标志物蛋白(N-cadherin、Vimentin)的表达水平（P＜0.01)。结论:CPNE7在胃癌组织和细胞中表达上调,敲减CPNE7可通过影响EMT进程抑制胃癌细胞增殖、迁移与侵袭,其可能成为胃癌的潜在分子标志物。     

RETRACTED ARTICLE: MiR-200 suppresses metastases of colorectal cancer through ZEB1

Poor prognosis of some colorectal cancer (CRC) cases largely results from early metastases of CRC to the distal organs. Thus, suppression of the invasion of CRC appears to be crucial therapy. Since microRNAs (miRNAs) play critical roles in the regulation of cancer metastases, identification of the involved miRNAs may provide novel therapeutic targets for CRC treatment. Here, we showed that the levels of miR-200 were significantly decreased and the levels of ZEB1 were significantly increased in the CRC specimens from patients, compared to the paired non-tumor tissue. Moreover, the levels of miR-200 and ZEB1 are inversely correlated. Bioinformatics analyses showed that miR-200 targeted the 3′-UTR of ZEB1 mRNA to inhibit its translation, which was confirmed by luciferase reporter assay. Moreover, miR-200 overexpression inhibited ZEB1-mediated cell invasiveness, while miR-200 depletion increased ZEB1-mediated cell invasiveness in CRC cells. Together, our data suggest that miR-200 suppression in CRC cells may promote ZEB1-mediated cancer metastasis. Our work thus highlights a novel molecular regulatory machinery that regulates metastases of CRC.     

miR-340 inhibition of breast cancer cell migration and invasion through targeting of oncoprotein c-Met

BACKGROUND:

Different microRNAs have been shown to have oncogenic and tumor‐suppressive functions in human cancers. Detection of their expression may lead to identifying novel markers for breast cancer.

METHODS:

The authors detected miR‐340 expression in 4 human breast cell lines and then focused on its role in regulation of tumor cell growth, migration, and invasion and target gene expression. They then analyzed miR‐340 expression in benign and cancerous breast tissue specimens.

RESULTS:

Endogenous miR‐340 expression was down‐regulated in the more aggressive breast cancer cell lines, which was confirmed in breast cancer tissue specimens by using quantitative real‐time polymerase chain reaction. Further studies showed that induction of miR‐340 expression was able to suppress tumor cell migration and invasion, whereas knockdown of miR‐340 expression induced breast cancer cell migration and invasion. At the gene level, the authors identified c‐Met as a direct miR‐340 target to mediate cell migration and invasion through regulation of MMP‐2 and MMP‐9 expression. Ex vivo, loss of miR‐340 expression was associated with lymph node metastasis, high tumor histological grade, clinical stage, and shorter overall survival of breast cancer as well as increased c‐Met expression in breast cancer tissue specimens.

CONCLUSIONS:

miR‐340 may play an important role in breast cancer progression, suggesting that miR‐340 should be further evaluated as a novel biomarker for breast cancer metastasis and prognosis, and potentially a therapeutic target. Cancer 2011. © 2011 American Cancer Society.