miR-374 a对肺腺癌细胞增殖与侵袭迁移的影响

目的 探究分析miR-374a对非小细胞肺癌细胞增殖、侵袭、迁移等生物学行为能力的影响.方法 采用RT-PCR检测miR-374a在正常肺上皮细胞CCD-8L及非小细胞肺癌细胞A549、H1975中的表达情况.采用miR-374a mimic和miR-374a inhibitor转染非小细胞肺癌细胞A549、H1975...     

Integrin α11 in non–small cell lung cancer is associated with tumor progression and postoperative recurrence

Integrins are transmembrane proteins that mediate cell adhesion to the extracellular matrix. Integrin α11 (ITGA11) is not expressed in normal alveolar epithelial cells and is a known receptor for collagen. While integrin α11β1 overexpression in the tumor stroma has been associated with tumor growth and metastatic potential of non–small cell lung cancer (NSCLC), little is known about the role of ITGA11 in tumor cells. Thus, we examined the RNA expression of ITGA11 by quantitative RT‐PCR in 80 samples collected from NSCLC patients who had undergone surgical resection and analyzed the clinical outcomes. We found that high expression of ITGA11 was associated with lower recurrence‐free survival in all NSCLC patients (P = 0.043) and in stage I NSCLC patients (P = 0.049). These results were consistent with in silico analyses of the Cancer Genome Atlas database. We also analyzed cell proliferation, migration and invasion capacity in lung cancer cell lines after overexpression of ITGA11. Overexpression of ITGA11 in lung cancer cell lines had little effect on cell proliferation but resulted in increased migration and invasion capacity. Our findings suggest that ITGA11 plays a significant role in cancer migration and invasion, leading to higher recurrence. ITGA11 expression may be a predictor of poor prognosis in patients with surgically resected NSCLC.     

非小细胞肺癌中lncRNA DLEU1的表达对肿瘤细胞转移的影响

  目的  研究长片段非编码RNA（long non-coding RNA,lncRNA）淋巴细胞白血病缺失基因1（deleted in lymphocytic leukemia 1,DLEU1）在非小细胞肺癌（non-small cell lung cancer,NSCLC）中的表达模式和临床意义,并进一步评估其对肿瘤转移的影响。  方法  42例NSCLC患者配对的癌组织和癌旁组织于2008年1月至2012年12月在中南大学湘雅三医院经手术切除获得。采用实时定量聚合酶链反应检测NSCLC组织和细胞中DLEU1的表达特征。运用统计学方法分析DLEU1的表达与NSCLC患者临床病理特征及生存时间的关系。通过体外伤口愈合和细胞侵袭试验分析DLEU1对NSCLC细胞迁移及侵袭的影响。运用蛋白质印迹法检测DLEU1对NSCLC细胞上皮间质转化（EMT）的标志物（E-钙粘蛋白、N-钙黏蛋白和波形蛋白）表达量的影响。  结果  42例NSCLC样本中,DLEU1的表达在35例中表现出上调（83.33%）,而在7例中表现出下调（16.67%）。DLEU1在NSCLC癌组织的表达量是癌旁组织的2.11倍（P < 0.05）。DLEU1在4种NSCLC细胞系（A549、H1299、SPCA1和H358）的表达量均高于正常肺16HBE上皮细胞,其中,A549细胞中DLEU1表达量最高（P < 0.05）。高表达的DLEU1与淋巴结转移呈正相关（P < 0.05）,但与其他参数无显著相关性,包括患者性别、年龄、吸烟史、原发肿瘤大小、组织学分级和TNM分期。与低DLEU1表达组患者相比,高表达组患者生存时间显著缩短（P < 0.05）。与对照组相比,体外干扰DLEU1的表达可显著抑制A549和SPCA1细胞的迁移和侵袭能力（P < 0.05）。与对照组相比,体外干扰DLEU1可显著增加A549细胞中E-钙黏蛋白表达量,而降低N-钙黏蛋白和波形蛋白表达量（P < 0.05）。  结论  DLEU1在NSCLC组织和细胞系中表达上调,并与患者淋巴结转移和生存时间相关,且具有通过EMT促进肿瘤细胞迁移和侵袭的功能,表明DLEU1可能作为NSCLC的潜在治疗靶点。      

JAM-C promotes lymphangiogenesis and nodal metastasis in non-small cell lung cancer

This study aims to investigate lymphatic metastasis-related genes in non-small cell lung carcinomas (NSCLC). NSCLC tissue was analyzed for expression of junctional adhesion molecule-C (JAM-C) protein. Our data revealed novel associations between JAM-C overexpression in primary tumors and lymphatic microvessel density (LMVD), lymph node metastasis, and poorer overall survival and recurrence-free survival. We used the highly metastatic human lung adenocarcinoma cell line Anip973 and its parental line AGZY83-a, which has a low metastatic capacity, in vivo and vitro. We found that JAM-C played an important role in different metastasis capacity of lymph node. JAM-C affected tumor growth, LNM, JAM-C, VEGF-C, vasculature, and ERK1/2 phosphorylation (p-ERK1/2). β1 integrin was involved in lymph node metastasis. Moreover, JAM-C knockdown in highly metastatic Anip973 decreased cell migration in scratch-wound assays. The JAM-C knockdown in Anip973 cells and JAM-C cDNA in AGZY83-a cells regulated the vascular endothelial growth factor C (VEGF-C) expression. Immunofluorescence showed that blocked VEGF-C expression in JAM-C shRNA Anip973 cells were restored after JAM-C treatment. JAM-C-induced VEGF-C in JAM-C cDNA AGZY83-a cells was also effectively inhibited by treatment with an antibody specifically against JAM-C. Use of media from Anip973 cells, AGZY83-a, and A549cells lung cancer cells that overexpressed or downregulated JAM-C was demonstrated to affect activity of VEGF-C-induced β1 integrin subunit or ERK activity in human dermal lymphatic endothelial cells (HDLEC) treated with VEGF-C or inhibitory antibody to JAM-C. Overall, these results indicate that JAM-C could mediate metastasis as it contributes to VEGF-C expression in cancer cells. JAM-C affects β1and ERK activation in HDLEC, thus promoting lymphangiogenesis and nodal metastasis. Our findings indicate that JAM-C may be a therapeutic target for preventing and treating lymphatic metastases.     

Overexpression and cytoplasmic accumulation of Hepl is associated with clinicopathological parameters and poor prognosis in non-small cell lung cancer

Hepl, first described in 2008, is the fourth member of the Crk-associated substrate (CAS) family and is specifically expressed in the lung. Compared to other CAS proteins, Hepl has a varying effect on cell migration in different cell types. We speculated that Hepl may play a role in lung cancer invasion and metastasis. We quantified the expression and subcellular localization of Hepl in 143 non-small cell lung cancer (NSCLC) tissues, adjacent noncancerous tissues, and eight lung cancer cell lines using Western blotting, immunohistochemistry, and immunofluorescent staining. Expression of Hepl was correlated with the clinicopathological features of NSCLC. Hepl was overexpressed in 72.3 % (103/143) of the NSCLC tissues, compared to the adjacent noncancerous lung tissues (P?=?0.022). Overexpression of Hepl was associated with lymph node metastasis and high TNM stage (P?=?0.005 and P?=?0.045, respectively). Kaplan–Meier survival curves and the log-rank test indicated that overexpression of Hepl correlated with poorer overall survival in NSCLC (P?<?0.001), and Cox regression analysis demonstrated that overexpression of Hepl was an independent prognostic factor in NSCLC. Furthermore, cytoplasmic accumulation of Hepl was observed in a high metastatic potential lung cancer cell lines (H1299 and BE1), but not in low metastatic potential cell lines (LTE and A549). This study reveals that Hepl is overexpressed in the nucleus and aberrantly accumulates in the cytoplasm of NSCLC cells, and indicates that Hepl may play a role in the progression of lung cancer, including lymph node metastasis and TNM stage. Additionally, Hepl may be a useful prognostic factor in lung cancer.     

Testin在非小细胞肺癌组织和细胞株中的表达及其对癌细胞恶性生物学行为的影响

目的:探讨Testin基因(TES)在非小细胞肺癌(NSCLC)组织和细胞株中的表达及其对人肺癌A549细胞增殖、迁移、侵袭和凋亡的影响.方法:收集2015年1月至2015年12月在华中科技大学同济医学院附属同济医院手术切除的27例NSCLC患者的癌组织及癌旁组织标本,用Western blotting法检测癌组织和癌旁组织,以及正常人胚肺成纤维细胞株MRC5和肺癌细胞株A427、A549、H1299、LK2、PC9和SW900中TES蛋白的表达水平.应用短发卡RNA(shRNA)瞬时转染肺癌细胞株A549干扰TES基因的表达,并进一步检测TES低表达对A549细胞增殖、迁移、侵袭以及凋亡的影响,同时检测凋亡相关蛋白Bax、Bcl-2和Cas-pase-3的表达.结果:在NSCLC组织和细胞株中TES蛋白的表达明显下降(均P＜0.05).shTES干扰A549细胞后,TES mRNA和蛋白表达水平均显著下降(均P＜0.05).抑制TES表达显著增强A549细胞的增殖[(2.75±0.04) vs (1.79±0.06),P＜0.05]、迁移[(52.3±2.6)％s(19.7±1.4)%,P＜0.05]和侵袭能力[(31.2±3.9)％vs(14.5±4.1)％,P＜0.05],同时降低了细胞凋亡率[(8.2±1.1)％s(23.1±1.7)％,P＜0.05].TES低表达使A549细胞Bax和Caspase-3蛋白表达明显下降(P＜0.05)、Bcl-2蛋白表达明显升高(P＜0.05).结论:TES在NSCLC组织中呈低表达,TES表达下调具有促进肺癌细胞的增殖、迁移、侵袭并抑制凋亡等生物学效应,其有可能成为肺癌治疗一个新靶点.     

Increased expression of integrin alpha3beta1 in highly brain metastatic subclone of a human non-small cell lung cancer cell line

To clarify the roles of integrin and extracellular matrix (ECM) in the process of non-small cell lung cancer (NSCLC) brain metastasis, we established an in vivo model of brain metastasis of human NSCLC cell line EBC-1/original in athymic mice, and established highly brain metastatic subclone EBC-1/brain and highly bone metastatic subclone EBC-1/bone. Integrin expression of these subclones was evaluated by flow cytometry. In vitro cell attachment, migration and proliferation assays with ECMs were performed using these subclones. Expression of integrin α3 subunit was higher in EBC-1/brain than in both EBC-1/original and EBC-1/bone. In vitro cell attachment, migration, and proliferation assays revealed that EBC-1/brain had higher affinity and higher reactivity to laminin than EBC-1/original and EBC-1/bone. Blocking of integrin α3β1 significantly (P<0.05) decreased brain metastasis by EBC-1/brain. Interaction of integrin α3β1 and laminin plays important roles in the process of brain metastasis of non-small cell lung cancer.     

HS3ST1对肺癌细胞增殖、迁移、侵袭及顺铂耐药的作用机制研究

目的:研究HS3ST1对肺癌细胞A549增殖、迁移、侵袭及顺铂耐药的影响。方法:利用慢病毒感染并构建HS3ST1过表达细胞株;利用Western blot、RT-PCT检测HS3ST1的表达;利用CCK8实验、Transwell迁移实验和细胞毒性实验检测HS3ST1对A549细胞增殖、迁移、侵袭和顺铂耐药的影响;利用Western blot检测NF-κB信号通路的蛋白改变;利用GEO数据库（GSE108214）进行顺铂耐药基因分析,利用GEO数据库（GSE30219）数据分析HS3ST1表达水平对肺癌患者总生存时间（overall survival,OS）的影响。结果:HS3ST1在肺癌细胞及肺癌组织中呈高表达,中晚期（Ⅲ-Ⅳ期）肺癌组织中HS3ST1表达高于早期（Ⅰ-Ⅱ期）肺癌组织;过表达HS3ST1促进A549细胞的增殖、迁移和侵袭;GEO数据库（GSE108214）分析显示顺铂耐药细胞株高表达HS3ST1;细胞毒性实验表明过表达HS3ST1导致肺癌细胞顺铂耐药;过表达HS3ST1活化p65及p-p65;GEO数据库（GSE30219）数据显示高表达HS3ST1肺癌患者OS显著缩短。结论:HS3ST1可能通过NF-κB信号通路促进肺癌细胞的增殖、迁移、侵袭及顺铂耐药,高表达HS3ST1肺癌患者预后较差。     

miR-492对非小细胞肺癌细胞迁移及侵袭能力的影响

目的:探讨miR-492对非小细胞肺癌（non-small cell lung cancer,NSCLC）细胞迁移和侵袭能力的影响,并探讨其可能的作用机制。方法:RT-qPCR检测NSCLC组织及细胞株（Calu-1、A549、H1650和H1299）中miR-492的表达。A549细胞瞬时转染miR-492 mimics或miR-492 inhibitors,并通过划痕实验及Transwell实验检测细胞的迁移及侵袭能力。双荧光素酶实验证实miR-492调控的靶基因。结果:NSCLC组织及细胞株中miR-492表达明显升高。将miR-492 mimics转染A549细胞后,细胞的迁移和侵袭能力明显增强。将miR-492 inhibitors转染A549细胞后,细胞的迁移和侵袭能力明显减弱。PTPN9是miR-492的直接靶基因。结论:miR-492可能通过调节靶基因PTPN9,从而促进NSCLC细胞的迁移和侵袭。     

降调ACSS2对非小细胞肺癌A549细胞增殖、凋亡和迁移的影响

背景与目的：代谢水平的改变是肿瘤细胞生长的主要特征之一,有研究证实,乙酰辅酶A合成酶2(cytosolic acetyl-CoA synthetase 2,ACSS2)在肿瘤细胞的代谢中起着至关重要的作用。本研究拟通过RNA干扰技术抑制非小细胞肺癌(non-small cell lung cancer,NSCLC)A549细胞中ACSS2的表达,探讨ACSS2对A549细胞增殖、凋亡和迁移的影响。方法：设计并合成针对ACSS2的特异性干扰片段ACSS2-siRNA及与ACSS2没有同源性的阴性对照,瞬时转染NSCLC A549细胞,通过实时荧光定量聚合酶链反应(real-time lfuorescent quan-titative polymerase chain reaction,RTFQ-PCR)检测ACSS2 mRNA的表达情况,四甲基偶氮唑盐(methyl thiazolyl tetrazolium,MTT)实验检测转染组与对照组细胞的增殖情况,流式细胞仪检测细胞的凋亡率,细胞划痕实验检测细胞迁移能力。结果：通过转染体外合成的干扰片段ACSS2-siRNA,NSCLC A549细胞中ACSS2 mRNA呈显著低表达。ACSS2-siRNA干扰组的细胞较对照组增殖活性明显减弱,凋亡增加,迁移能力减弱。结论：降调ACSS2表达能显著抑制A549细胞增殖、迁移能力,促进凋亡尤其是早期凋亡明显增加。     

miR-506通过调控MCL-1抑制耐阿立替尼非小细胞肺癌A549细胞上皮间质转化的作用机制

目的:探究miR-506通过调控MCL-1对耐阿立替尼非小细胞肺癌A549细胞上皮间质转化（epithelial mesenchymal transformation,EMT）及侵袭转移的影响和作用机制。方法:收集2017年12月至2018年12月我院肿瘤科收治的经PET-CT结合组织病理活检及药敏试验确诊为耐阿立替尼的74例非小细胞肺癌患者的癌及癌旁组织以及人非小细胞肺癌A549细胞为研究对象,分别采用细胞转染、免疫组化染色（IHC）、qRT-PCR和Western Blot法检测上述临床组织和细胞样本中miR-506、MCL-1、BAX/Bcl-2凋亡信号途径及EMT标志蛋白表达水平;此外,采用Transwell细胞实验观察miR-506过表达和MCL-1敲减对A549细胞迁移和侵袭能力的影响。结果:免疫组化（IHC）结果显示肺癌患者癌组织中浸润性坏死性病理损伤较癌旁组织明显加重,且癌组织中MCL-1的阳性表达率为94.64%,明显高于癌旁组织的23.27%（P＜0.05）。qRT-PCR和Western Blot结果显示,肺癌组织中miR-506、BAX和E-cadherin的表达明显低于癌旁组织,而MCL-1、Bcl-2和N-cadherin的表达显著高于癌旁组织（P＜0.05）。细胞实验结果表明miR-506过表达和MCL-1敲减能够明显上调BAX和E-cadherin的表达,同时抑制Bcl-2和N-cadherin的表达（P＜0.05）;此外,miR-506过表达和MCL-1敲减均能显著抑制肺癌A549细胞的迁移和侵袭能力（P＜0.05）。结论:miR-506可能通过抑制BAX/Bcl-2/MCL-1凋亡途径发挥抑制耐阿立替尼非小细胞肺癌A549细胞EMT及诱导细胞凋亡作用,有望为临床抗肺癌转移及凋亡抑制靶向治疗提供新分子和靶点。     

长链非编码RNA HOTAIR对非小细胞肺癌迁移和侵袭能力的影响

目的 探讨长链非编码RNA HOTAIR在非小细胞肺癌（NSCLC）组织及4株细胞系（A549、SPC-A1、SK-MES-1和16HBE）中的表达,并分析其对细胞侵袭和迁移能力的影响。方法通过定量反转录PCR（qRT-PCR）检测HOTAIR在38例NSCLC组织及4株细胞系中的表达水平,并进一步利用过表达和RNA干扰技术探讨HOTAIR的生物学功能。通过分别转染pcDNA-HOTAIR或si-HOTAIR来上调或下调HOTAIR的表达,以空载体（pcDNA3.1-NC）和阴性对照（si-NC）作为对照组,用qRT-PCR检测转染效率。用MTT法和Transwell法评估异常表达的HOTAIR对NSCLC细胞增殖、迁移和侵袭能力的影响。结果 38例NSCLC组织中HOTAIR相对表达水平为24.48±59.55。与正常支气管上皮细胞系16HBE相比,HOTAIR在SPC-A1和SK-MES-1细胞中相对高表达,而在A549细胞中相对低表达。转染HOTAIR siRNA 48h后,A549和SPC-A1细胞中HOTAIR表达下调;转染pcDNA3.1 HOTAIR 48h后,A549细胞中HOTAIR表达上调。MTT实验显示,通过RNAi技术来抑制HOTAIR的表达,对NSCLC细胞的增殖能力无明显影响。Transwell实验显示,通过转染si-HOTAIR来下调HOTAIR表达可抑制癌细胞的迁移和侵袭（P＜0.05）;相反,过表达HOTAIR可以显著促进癌细胞的迁移和侵袭（P＜0.05）。结论 HOTAIR在NSCLC中异常高表达,能显著增强NSCLC细胞的迁移和侵袭能力,提示可能与不良预后相关。     

GSDMD对肺癌A549细胞增殖和侵袭的生物学作用

目的:探讨GSDMD对肺癌细胞A549生物学表型的影响。方法:利用肺癌组织芯片,通过免疫组化的方法检测了肺癌组织中GSDMD的蛋白表达;利用慢病毒转染技术,分别下调和上调了A549细胞中GSDMD的表达,并通过一系列体外功能试验,探索了GSDMD下调和上调对肺癌细胞A549生物学表型的影响。结果:免疫组化结果提示:GSDMD在肺癌组织中的高表达高于癌旁正常组织,且其主要定位于肺癌的细胞质。利用慢病毒转染技术,构建了稳定下调和上调GSDMD的细胞系A549-siGSDMD和A549-LV-GSDMD。BrdU细胞增殖及CCK8实验表明:下调GSDMD的表达抑制了A549细胞的增殖能力,反之亦然;高内涵细胞运动试验证实:下调GSDMD的表达抑制了A549细胞的运动能力,反之亦然;Transwell迁移和侵袭试验表明:下调GSDMD的表达,抑制了A549细胞的迁移和侵袭能力,而上调GSDMD的表达,则得到了相反的结果。结论:GSDMD促进了肺癌细胞A549的增殖、迁移和侵袭能力。     

miR-30a通过靶向调控ZEB2抑制非小细胞肺癌的迁移与侵袭

目的:探讨miR-30a在非小细胞肺癌(non-small cell lung cancer,NSCLC)细胞中的表达情况及miR-30a在肺癌细胞迁移和侵袭过程中的作用及其机制。方法:采用qRT-PCR检测miR-30a在不同NSCLC细胞株中的表达情况;采用脂质体2000转染miR-30a mimics和E盒结合锌指蛋白2（E-box binding zinc finger protein 2,ZEB2） siRNA;通过qRT-PCR检验miR-30a mimics和ZEB2 siRNA的转染效率及转染后ZEB2 mRNA的表达水平变化;Western blot检测转染miR-30a mimics和ZEB2 siRNA后ZEB2蛋白表达情况;采用双荧光素酶报告实验验证miR-30a和ZEB2的相互作用机制;划痕实验和Transwell小室侵袭实验检测上调miR-30a和干扰ZEB2对A549细胞迁移和侵袭能力的影响。结果:实验结果显示,与正常人支气管上皮细胞相比,在不同NSCLC细胞株中miR-30a的表达呈不同程度下调;NSCLC细胞转染miR-30a mimics和ZEB2 siRNA后均获得满意的转染效果:miR-30a mimics和ZEB2 siRNA明显降低了NSCLC细胞中ZEB2的mRNA和蛋白的表达水平,组间差异具有统计学意义。双荧光素酶报告实验验证miR-30a对ZEB2 3' UTR具有直接调控作用。细胞迁移实验和侵袭实验结果显示,与Blank组和NC组相比,miR-30a过表达组和ZEB2基因沉默组的A549细胞迁移和侵袭能力均明显降低,说明miR-30a mimics和ZEB2 siRNA均对A549细胞细胞迁移和侵袭有抑制作用。结论:上调miR-30a的表达水平可以负调控ZEB2转录后表达水平,通过抑制上皮-间质转化(epithelial-mesenchymal transition,EMT)的进程来抑制肺癌细胞的转移和侵袭。     

High expression of heme oxygenase-1 is associated with tumor invasiveness and poor clinical outcome in non-small cell lung cancer patients

Background

Heme oxygenase-1 (HO-1), a rate-limiting enzyme in heme catabolism, is known to play a role in the protection of cells against oxidative stress, inflammation, anomalous proliferation and apoptosis. As yet, the role of HO-1 expression in non-small cell lung cancer (NSCLC) development and metastasis remains unclear and insufficient data are available regarding its impact on the prognosis of NSCLC patients.

Methods

Seventy NSCLC patients who underwent surgical resection were included in this HO-1 expression study and, concomitantly, clinical parameters were collected. Two lung adenocarcinoma cell lines (A549 and H441) were used to assess both invasive and migratory parameters in vitro.

Results

NSCLC patients with a high HO-1 expression ratio (tumor tissue/normal tissue) (> 1) exhibited a significantly poorer prognosis and a higher metastatic rate compared to those with a low HO-1 expression ratio (p?<?0.05). The invasive and migratory abilities of A549 and H441 cells significantly increased after exogenous HO-1 over-expression and significantly decreased after siRNA-mediated HO-1 expression silencing. HO-1 up- and down-regulation also positively correlated with the expression of metastasis-associated proteins EGFR, CD147 and MMP-9. In addition, we found that HO-1 expression can be inhibited by PI3K and AKT inhibitors, but not by MAPK inhibitors.

Conclusions

HO-1 is a poor prognostic NSCLC predictor and its over-expression may increase the metastatic potential of NSCLC. Based on our findings and those of others, HO-1 may be considered as a novel NSCLC therapeutic target.     

Effects of Rad51 on Survival of A549 Cells

Rad51, a key factor in the homologous recombination pathway for the DNA double-strand break repair,plays a vital role in genesis of non-small-cell lung cancer (NSCLC). In recent years, more and more studiesindicate that high expression of Rad51 is of great relevance to resistance of NSCLC to chemotherapeutic agentsand ionizing radiation. However, the underlying molecular mechanisms are poorly understood. In this study,we investigated the role of single Rad51 on cell viability in vitro. Our results show that depletion of endogenousRad51 is sufficient to inhibit the growth of the A549 lung cancer cell line, by accumulating cells in G1 phase andinducing cell death. We conclude that independent Rad51 expression is critical to the survival of A549 cells andcan be an independent prognostic factor in NSCLC patients.     

沉默泛素结合酶E2O对人非小细胞肺癌细胞增殖和侵袭的影响

  目的  研究泛素结合酶E2O（ubiquitin-conjugating enzyme E2O,UBE2O）蛋白在非小细胞肺癌（non-small cell lung cancer,NSCLC）细胞增殖、细胞周期、迁移、侵袭中的作用。  方法  通过慢病毒介导的shRNA靶向抑制人NSCLC细胞株A549中UBE2O基因的表达,应用CCK-8法、流式细胞术分别检测UBE2O对A549细胞增殖、细胞周期和凋亡的影响,应用Transwell实验检测下调UBE2O表达后对A549细胞迁移、侵袭能力的影响,应用Western blot检测细胞上皮间质转化（epithelial-mesenchymal transition,EMT）两种标志分子E-cadherin蛋白、N-cadherin蛋白和PI3K-Akt信号通路相关蛋白表达量的变化。  结果  下调UBE2O表达后,A549细胞UBE2O mRNA和蛋白表达均下调（均P < 0.01）,CCK-8实验结果显示沉默UBE2O可以抑制A549的增殖（P < 0.001）,Transwell实验显示下调UBE2O的表达能够抑制A549细胞的迁移、侵袭（均P < 0.001）。Western blot结果表明下调UBE2O的表达可使A549细胞中的E-cadherin蛋白表达水平升高、p-Akt蛋白表达水平下降。  结论  UBE2O蛋白能够促进NSCLC细胞侵袭和迁移,作用机制可能是通过诱导肺癌细胞发生EMT和促进pI3K-Akt信号通路的激活。