HAX-1 is overexpressed in hepatocellular carcinoma and promotes cell proliferation

Hepatocellular carcinoma (HCC) is the most common primary liver tumor. Due to the asymptomatic nature of early HCC and lack of effective screening strategies, 80% of patients present with advanced HCC at the time of diagnosis. Novel molecular marker identification will be valuable for effective diagnosis and treatment. In this study we reported HCLS1-associated protein X-1 (HAX-1) is overexpression in HCC in human HCC sample. Furthermore, we provided evidence that HAX-1 expression positively correlated with that of Ki67 in patient sample. Statistic analysis indicated that HAX-1 expression level significantly correlated with clinic outcome of HCC. Cell based assay revealed that knockdown of HAX-1 inhibits cell proliferation. This result suggests that HAX-1 can be a novel molecular marker for HCC.     

Expression of Girdin in primary hepatocellular carcinoma and its effect on cell proliferation and invasion

Girdin has been proven to play a vital role in the process of proliferation, apoptosis, and invasion in various cancer cells, yet the underlying molecular mechanism in primary hepatocellular carcinoma (HCC) has not yet been clarified. Thereafter, we performed immunohistochemistry to detect the expression of Girdin in 40 primary HCC tissues and 30 matched adjacent tissues using hepatic carcinoma tissue microarray. Our data showed that the positive expression rate of Girdin in hepatocellular carcinoma tissues was 67.5%, higher than that found in adjacent tissues of 16.7% (P < 0.05). It closely correlates to tumor size, T stage, TNM stage and Edmondson-Steiner stage (P < 0.05) of HCC patients. After specific small interfering RNA of Girdin was transfected into HepG2 and Huh7.5.1 cells, the proliferation and invasion ability of tumor cells were significantly inhibited. In summary, we suggest that the oncogenic role of Girdin could provide new molecular target for the treatment of HCC.     

lncRNA PCAT1表达下调抑制口腔鳞状细胞癌细胞的增殖、生长、侵袭、迁移及上皮-间充质转化

目的:探讨长链非编码RNA(long non-coding RNA,lncRNA) PCAT1对口腔鳞状细胞癌(oral squamous cell carcinoma,OSCC)细胞的增殖、生长、侵袭及迁移的影响,并探讨其可能机制。方法:采用Lipofectamine 200将PCAT1 siRNA转染入OSCC细胞分别利用RT-qPCR和Western blot检测相关基因的mRNA及蛋白表达;分别利用CCK-8实验和集落形成实验检测OSCC细胞的增殖及生长能力;利用细胞侵袭实验和细胞迁移实验检测OSCC细胞的侵袭及迁移能力。结果:PCAT1在OSCC组织和细胞中的表达与癌旁正常组织和正常口腔细胞黏膜角质细胞相比显著上调(P 0. 05)。转染PCAT1 siRNA可以显著降低PCAT1在Tca8113和TSCCa细胞中的表达(P 0. 05)。PCAT1的低表达可以显著抑制Tca8133和TSCCa细胞的增殖、生长、侵袭及迁移(P 0. 05)。PCAT1在Tca8113和TSCCa细胞中的低表达可以抑制ZEB1、N-cadherin和vimentin的mRNA及蛋白表达,同时增加E-cadherin的mRNA及蛋白表达(P 0. 05)。结论:沉默PCAT1能够抑制OSCC细胞的增殖、生长及转移,该作用可能与调控上皮-间充质转化有关。     

Combined identification of long non-coding RNA CCAT1 and HOTAIR in serum as an effective screening for colorectal carcinoma

Long non-coding RNAs (lncRNAs) CCAT1 and HOTAIR have been shown to play an important regulatory role in cancer biology, and CCAT1 and HOTAIR are upregulated in several cancers, however, its value in the diagnosis of colorectal cancer (CRC) is unclear. Therefore, the aim of this study is to evaluate the clinical significance of plasma CCAT1 and HOTAIR as a biomarker in the screening of CRC. In our study, we found that the levels of HOTAIR (P < 0.05) and CCAT1 (P < 0.05) were significantly higher in plasma of CRC patients than that of the healthy control. Moreover, the levels of lincRNA-p21 (P < 0.05) were obviously decreased in plasma of CRC patients as compared to those of healthy control. There was highly correlated for CCAT1 (R = 0.752, mean differences = -0.06 ± 1.20), HOTAIR (R = 0.739, mean differences = -0.26 ± 0.76) and lincRNA-p21 (R = 0.848, mean differences = -0.41 ± 0.89) in plasma and serum. By receiver operating characteristic curve (ROC) analysis, plasma CCAT1 provided the higher diagnostic performance for detection of CRC (the area under the ROC curve (AUC), 0.836; P < 0.001; sensitivity, 75.7%; specificity, 85.3%). Moreover, CCAT1 combining with HOTAIR could provide a more effective diagnosis performance (AUC, 0.954, P < 0.001, sensitivity, 84.3%; specificity, 80.2%). Most importantly, this combination was effective to detect CRC at an early stage (85%). In conclusion, our results demonstrated that increased plasma HOTAIR and CCAT1 could be used as a predictive biomarker for CRC screening, and that combination of HOTAIR and CCAT1 had a higher positive diagnostic rate of CRC than HOTAIR or CCAT1 alone.     

长链非编码RNA MIAT在非小细胞肺癌中的表达及功能研究

目的:研究长链非编码RNA心肌梗死相关转录本(MIAT)在非小细胞肺癌(NSCLC)组织及细胞系中的表达情况及其对NSCLC细胞功能的影响。方法:利用Gene Expression Omnibus(GEO)数据库提取GSE19804和GSE30219数据集的生物信息学资料和临床预后资料,分析MIAT在NSCLC组织和正常肺组织中的表达差异,以及MIAT表达水平与NSCLC患者生存期的关系;用q PCR检测25对NSCLC肿瘤组织和其癌旁组织,以及NSCLC细胞系A549、NCI-H266和NCI-H1299及人正常支气管上皮细胞系HBE中MIAT的表达情况;将MIAT si RNA(si-MIAT)和对照序列(si-NC)分别转染NSCLC细胞系A549,采用流式细胞术、CCK-8实验和细胞集落形成实验检测2组细胞的增殖情况,并且用q PCR和Western blot实验检测2组细胞中细胞周期蛋白D1(cyclin D1)和细胞周期蛋白依赖性激酶抑制剂1A(CDKN1A)的表达情况。结果:GSE19804数据集分析显示MIAT在NSCLC组织中的表达高于正常肺组织(P0.05),GSE30219数据集分析显示MIAT高表达患者的生存期显著短于低表达患者(P0.01)。此外,与癌旁正常组织和HBE细胞相比较,NSCLC组织和细胞系中MIAT的表达水平升高(P0.05);si-MIAT组A549细胞中MIAT表达水平明显低于si-NC组(P0.01),且细胞活力和细胞集落数均低于siNC组,差异均有统计学意义(P0.05);同时,相较于si-NC组,si-MIAT组cyclin D1的表达受到明显抑制(P0.05),而CDKN1A的表达明显升高(P0.05)。结论:NSCLC组织及细胞系中MIAT呈高表达,沉默MIAT表达可明显抑制NSCLC恶性增殖的表型。MIAT可作为NSCLC靶向治疗的潜在靶标。     

Silencing SATB1 influences cell invasion,migration, proliferation,and drug resistance in nasopharyngeal carcinoma

Special AT rich sequence binding protein 1 (SATB1) play an important role in many cancers, but the role of SATB1 in nasopharyngeal carcinoma (NPC) is still not full understand. Immunofluorescence staining showed that SATB1 was mainly localized in the nuclei in CNE-2 cell. After successful down-regulation of SABT1 in NPC cell line CNE-2 by shRNA, compared to parental CNE-2 and control shRNA group, the capacity of the proliferation, migration, invasion and drug resistance of CNE-2 cell was reduced, which indicated that SATB1 may be involved in NPC development and progression. SATB1 may be a promising therapeutic target for nasopharyngeal carcinoma.     

CADM1过表达对人胃癌MKN-45细胞增殖和侵袭的影响及其分子机制

 目的：研究细胞黏附分子1（cell adhesion molecule 1,CADM1）过表达对人胃癌MKN-45细胞增殖和侵袭的影响并探讨其可能的分子机制。方法：采用Western blotting检测3株胃癌细胞系中CADM1蛋白的表达。构建pcDNA-CADM1真核表达载体,并将其转染MKN-45细胞,采用G418筛选稳定表达CADM1的细胞株,利用Western blotting鉴定所筛选的稳定细胞株。采用CCK-8试剂和Boyden小室分析过表达CADM1对MKN-45细胞增殖和侵袭的影响。利用Western blotting检测细胞增殖和侵袭相关蛋白表达。结果：MKN-45细胞中CADM1蛋白的相对表达水平显著低于MKN-28和SGC-7901细胞（P<0.05）。此外,成功构建pcDNA-CADM1真核表达载体,并获得稳定过表达CADM1的MKN-45细胞株。CCK-8结果显示,与未处理组和pcDNA3.1组相比,pcDNA-CADM1组中MKN-45细胞的增殖明显受到抑制（P<0.05）。Boyden小室体外侵袭实验结果显示,与未处理组（101.53±6.89）和pcDNA3.1组（98.77±7.03）相比,pcDNA-CADM1组中MKN-45细胞穿膜的细胞数（52.35±3.89）显著减少（P<0.05）。Western blotting结果显示,与未处理组和pcDNA3.1组相比,pcDNA-CADM1组中p21蛋白表达显著上调,而MMP-2和MMP-9表达显著下调（P<0.05）。结论：CADM1过表达能明显抑制胃癌细胞的增殖和侵袭能力,因而CADM1有望成为胃癌治疗的新靶点。     

乙肝病毒促进肝癌细胞系的转移侵袭力

目的探讨乙肝病毒(HBV)对肝癌细胞转移能力的影响及其可能机制。方法以初始汇合度为30%,将3种细胞系HL-7702(人正常肝细胞系)、HepG2(未转染HBV-DNA的人肝癌细胞系)、HepG2.2.15(稳定转染HBV-DNA的人肝癌细胞系)种植于96孔板中,待细胞增殖至70%汇合时,利用划痕器制造划痕伤口,置于活细胞动态成像系统中进行多时间点的显微拍照与数据采集,计算相对伤口密度(RWD),并通过免疫荧光染色与Western blot技术测定细胞中Eph A2蛋白表达,分析其与RWD值的相关性。结果细胞迁移实验中,划痕后24~96 h,HL-7702组RWD显著高于HepG2与HepG2.2.15组(P0.01),划痕后72~144 h,HepG2.2.15组RWD显著高于HepG2组(P0.01);细胞侵袭实验中,HL-7702细胞因不能穿过基质胶,而无RWD值;划痕后72~144 h,HepG2.2.15组RWD显著高于HepG2组(P0.05或P0.01)。Eph A2表达:与HL-7702组比较,HepG2与HepG2.2.15组细胞中Eph A2表达水平显著升高(P0.01),其中HepG2.2.15组中Eph A2表达水平显著高于HepG2组(P0.01),且两组肝癌细胞中Eph A2的表达量与划痕实验的RWD值呈显著正相关(迁移实验:P0.01;侵袭实验:P0.01)。结论乙肝病毒可能促进肝癌细胞的迁移和侵袭能力,其机制可能与上调Eph A2的异常表达有关。     

SIRT2在浆液性卵巢癌细胞系中的表达及其对增殖、迁移和侵袭的影响

目的:研究SIRT2在卵巢表层上皮(ovarian surface epithelium,OSE)及浆液性卵巢癌(serous ovarian carcinoma,SOC)细胞系中的表达情况并从细胞增殖、迁移和侵袭这3个方面探讨SIRT2对SOC恶性生物学行为的影响。方法:运用Western blot技术检测OSE和SOC细胞系中SIRT2蛋白的表达水平;设计靶向SIRT2的siRNA,构建SIRT2过表达载体,分别瞬时转染OSE细胞系HOSEpi C和SOC细胞系HO8910,平板克隆形成实验和CCK-8实验研究SIRT2对细胞生长的影响;细胞划痕实验考察SIRT2在SOC细胞迁移中的作用;Transwell实验研究SIRT2对SOC细胞侵袭能力的影响。结果:5株SOC细胞系中SIRT2的表达水平显著低于OSE细胞系。在HOSEpi C细胞中沉默SIRT2,细胞克隆形成数增多,细胞活力增强。相反,在HO8910细胞中过表达SIRT2,细胞克隆形成数减少,细胞活力降低。沉默SIRT2促进HOSEpi C细胞的迁移,而过表达SIRT2则抑制HO8910细胞的迁移。沉默SIRT2的HOSEpi C细胞侵袭能力明显增加,而过表达SIRT2的HO8910细胞侵袭能力则显著降低。结论:SIRT2在SOC细胞中表达显著下调。SIRT2在OSE细胞中是肿瘤抑制蛋白,抑制细胞增殖、迁移和侵袭。     

MiR-26b inhibits hepatocellular carcinoma cell proliferation,migration, and invasion by targeting EphA2

Deregulated microRNAs (miRNAs) have been shown to play important roles in cancer progression as a result of changes in expression of their target genes. In this study, we investigated the expression of miR-16b in eight hepatocellular carcinoma (HCC) cell lines, revealed the roles of miR-26b on hepatocellular carcinoma (HCC) cell proliferation, migration, and invasion, and confirmed that EphA2 is a direct target of miR-26b. The miR-26b expression was decreased and EphA2 expression was evaluated in HCC cell lines. Luciferase assays revealed that miR-26b inhibited EphA2 expression by targeting the 3’-untranslated region of EphA2 mRNA. Overexpression of miR-26b dramatically inhibited the proliferation, invasion, and migration of HCC cells by targeting EphA2. Moreover, miR-26b down-regulated c-Myc and CyclinD1 expression, which was reversed by overexpressed EphA2. Taken together, our data demonstrated the mechanism of miR-26b contributed to HCC progression and implicated that miR-26b’s potential in HCC therapy.     

西罗莫司对膀胱癌BIU-87细胞增殖及侵袭能力的影响

目的探讨西罗莫司对膀胱癌BIU-87细胞增殖和侵袭能力的作用。方法将BIU-87细胞贴壁培养于10%胎牛血清、100 U/ml青霉素、100μg/ml链霉素的RPMI-1640培养液中,37℃、5%CO饱和湿度培养箱中2培养。取对数生长的BIU-87细胞,处理组加入西罗莫司的浓度范围是(10-1000)nmol/L;对照组不加药物,每天紧更换1640培养液。MTT法分析各浓度组的生长抑制率并制作抑制曲线,Transwell法通过使用matrigel基质胶检测BIU-87细胞在体外的侵袭能力。结果西罗莫司对BIU-87细胞有明显抑制作用,呈时间和量效依赖关系。Transwell法发现不同浓度的西罗莫司可以减弱BIU-87细胞的体外侵袭能力,呈量效依赖性。结论西罗莫司可以抑制膀胱癌BIU-87细胞的增殖活性及侵袭能力。     

Curcumin inhibits oral squamous cell carcinoma proliferation and invasion via EGFR signaling pathways

Epidermal growth factor receptor (EGFR) is an effective molecular target of anti-cancer therapies. Curcumin is known to inhibit growth, invasion and metastasis by downregulating EGFR expression in some cancer cells. However, the mechanism underlying the effect of curcumin in human oral squamous cell carcinoma (OSCC) remains unclear. In this study, we investigated the efficacy of curcumin on proliferation and invasion in SCC-25 cell line. We also explored the effect of curcumin on the activition of EGFR and its downstream signaling molecules Akt, ERK1/2 and STAT3. Furthermore, we examined the inhibition effect of curcumin on EGF-induced EGFR phosphorylation and SCC-25 cells invasion. Our results showed that curcumin inhibited SCC-25 cells proliferation and induced G2/M phase arrest in a dose-dependent manner. Curcumin also inhibited SCC-25 cells invasion and downregulated MMP-2, MMP-9, uPA and uPAR expression. We further revealed that curcumin regulated the p-EGFR and EGFR downstream signaling molecules including Akt, ERK1/2 and STAT3. Finally, our data showed that crucumin reduced the EGF-induced phosphorylation of EGFR and suppressed EGF-triggered SCC-25 cells invasion. Taken together, our results suggest that curcumin reduced SCC-25 cells proliferation and invasion through inhibiting the phosphorylation of EGFR and EGFR downstream signaling molecules Akt, ERK1/2 and STAT3.     

长链非编码RNA TTTY15在骨肉瘤组织中的表达及其对骨肉瘤细胞活力和侵袭的影响

目的:观察长链非编码RNA TTTY15在骨肉瘤组织及细胞株中的表达,并探讨其对骨肉瘤细胞活力和侵袭的影响。方法:应用qPCR法检测11例骨肉瘤组织及其瘤旁组织中TTTY15的水平,同时检测TTTY15在骨肉瘤细胞株(143B、Saos2、MG-63、U2OS和HOS)和人成骨细胞株hFOB1.19中的表达。在表达量最高的细胞株(MG-63)中通过转染小干扰RNA敲减TTTY15的表达,CCK-8法检测TTTY15低表达对细胞活力的影响,流式细胞术检测其对细胞周期的影响,Transwell检测其对细胞侵袭能力的影响,qPCR检测miR-216b-5p和FOXM1 mRNA的表达,Western blot法检测相关蛋白的变化。结果 :与瘤旁正常组织相比,TTTY15在骨肉瘤组织中表达升高(P0.01);与人成骨细胞相比,TTTY15在骨肉瘤细胞株中表达升高(P0.05),其中在MG-63细胞中表达水平最高(P0.01)。敲减TTTY15在MG-63细胞的表达后,细胞活力降低(P0.05),细胞周期被抑制在G_0/G_1期(P0.01),细胞的侵袭能力降低(P0.01),miR-216b-5p mRNA表达水平升高(P0.01),FOXM1的mRNA表达降低(P0.01),同时FOXM1、CDK4、cyclin D1、MMP-2和N-cadherin的蛋白表达降低,而E-cadherin的蛋白表达升高(P0.05)。结论:TTTY15在骨肉瘤组织和细胞株中表达增高,敲减TTTY15的表达可抑制骨肉瘤细胞的活力和侵袭能力,其机制可能与TTTY15低表达导致miR-216b-5p的表达升高,引起FOXM1基因表达下调有关。     

CDKN3 knockdown reduces cell proliferation,invasion and promotes apoptosis in human ovarian cancer

Cyclin-dependent kinase inhibitor 3 (CDKN3) has been reported to promote tumor genesis. The aim of this study is to investigate the possible mechanisms of silence of CDKN3 exerting the suppressive role on epithelial ovarian cancer (EOC). To study the potential function of CDKN3 enrolled in the regulation of ovarian tumor, we monitored the EOC cells SKOV3 and HO8910 behaviors including proliferation, cell cycle, apoptosis and invasion. First, we found that CDKN3 was frequently over-expressed in EOC. Functional studies showed that silence of CDKN3 inhibited cancer cell proliferation by promoting cell cycle progression in G1 phase, decreased cell invasion and promoted EOC cells apoptosis. Western blot analysis of CDKN3-silence cells revealed down-regulation of DNA-replication and cell cycle related proteins. And, a significant correlation level of CDKN3 was observed which has been demonstrated to be a novel oncogene. These findings indicated that CDKN3 might serve as a useful potential target for treatment of ovarian cancer.     

lncRNA-MALAT1通过靶向下调miR-570-3p促进胃癌细胞增殖

目的:探讨长链非编码RNA MALAT1(lncRNA-MALAT1)是否可通过靶向下调微小RNA-570-3p(miR-570-3p)促进胃癌细胞增殖。方法:将体外培养的人胃癌细胞株SGC7901分为3组:空白对照组、si-MALAT1组和si-MALAT1 NC组,其中空白对照组为单纯的SGC7901细胞株,si-MALAT1组和si-MALAT1 NC组分别转染lncRNA-MALAT1 siRNA及其阴性对照。MTS法检测各组细胞的增殖情况。RT-qPCR检测单纯的SGC7901细胞株培养不同时点的miR-570-3p及不同组别lncRNA-MALAT1和miR-570-3p的表达情况。通过生物信息学软件RegRNA预测获取lncRNA-MALAT1与miR-570-3p潜在的互补结合位点。将MALAT1及其突变体克隆到萤光素酶载体psiCHECK-2中,构建MALAT1野生型和突变型质粒,并采用酶切和测序方法鉴定psi CHECK-2-MALAT1载体是否构建成功。将MALAT1野生型和突变型质粒分别与miR-570-3p模拟物、miR-570-3p抑制剂、miR-570-3p模拟物阴性对照、miR-570-3p抑制剂阴性对照在293T细胞中共转染,收集细胞后通过双萤光素酶报告系统检测不同组别的萤光素酶活性,从而对lncRNA-MALAT1与miR-570-3p的靶向调节关系进行验证。结果:与空白对照组和si-MALAT1NC组相比较,si-MALAT1组在不同时点(24、48和72 h)的A490值显著降低(P 0. 01)。在单纯的SGC7901细胞株中,随着时间的推移,miR-570-3p的表达量逐渐下降(P 0. 05)。si-MALAT1组lncRNA-MALAT1的表达水平显著降低,而miR-570-3p表达显著升高(P 0. 01)。双萤光素酶报告基因检测显示,与miR-570-3p模拟物阴性对照组相比,miR-570-3p模拟物组MALAT1野生型报告基因的萤光素酶活性显著降低(P 0. 01),而miR-570-3p抑制剂组MALAT1野生型报告基因的萤光素酶活性较miR-570-3p模拟物组明显增高(P 0. 01); miR-570-3p模拟物、miR-570-3p抑制剂、miR-570-3p模拟物阴性对照及miR-570-3p抑制剂阴性对照对MALAT1突变型的表达均无明显影响。结论:lncRNA MALAT1能够通过靶向结合并下调miR-570-3p促进胃癌细胞增殖。     

miR-107 promotes hepatocellular carcinoma cell proliferation by targeting Axin2

Background: A large number of studies demonstrated that microRNAs play important roles in the progression and development of human cancers. However, the expression level of miR-107 and its biological function in hepatocellular carcinoma (HCC) remains unclear. Method: Quantitative real-time PCR (qRT-PCR) was used to evaluate the expression level of miR-107 in HCC tissues and cell lines. Then, we explored the function of miR-107 to determine its potential roles on HCC cell proliferation in vitro. Luciferase reporter assay was used to confirm the target gene of miR-107, and the results were validated in cell lines. Results: miR-107 was significantly up-regulated in HCC tissues and cell lines. The enforced expression of miR-107 was able to promote cell proliferation in HepG2 cells. At the molecular level, our results suggested that expression of Axin2 was negatively regulated by miR-107. Conclusion: Our observations suggested that miR-107 could promote HCC cells proliferation via targeting Axin2 and might represent a potential therapeutic target for HCC.     

NPM1基因突变调控THP-1细胞体外增殖和侵袭及其机制

目的探讨NPM1基因突变对THP．1细胞体外增殖和侵袭的影响及其机制。方法将THP．1细胞分为THP-1．mA组、空载体转染组和未处理组,THP-1．mA组使用携带人NPMl-mA的重组质粒pEGFPCI．NPMl．mA转染THP-1细胞,建立稳定表达NPM1．mA的白血病细胞系（THP-1-mA）;空载体转染组使用空载体质粒pEGFPCI转染THP-1细胞;未处理组不进行质粒转染。采用反转录PCR、免疫细胞化学检测3组细胞NPMl．mA基因和蛋白的表达;使用细胞生长曲线观察细胞体外增殖能力;流式细胞术检测细胞周期分布;细胞体外侵袭实验观察细胞体外侵袭能力;实时荧光定量PCR检测血管生成素1（Ang-1）、Ang．2mRNA的表达。结果成功构建了稳定表达NPMl．mA的白血病细胞株。与空载体转染组和未处理组比较,稳定表达NPMl。mA蛋白的THP-1．mA细胞体外增殖能力明显增强,G1期细胞比例减少,S期细胞比例增加（均P〈0．01）。与空载体转染组和未处理组比较,细胞体外侵袭实验显示THP．1-mA组细胞体外侵袭能力增强,实时荧光定量PCR显示THP．1．mA组细胞Ang．1mRNA表达增高（均P〈0．01）。结论NPMl突变基因的表达能够促进THP-1细胞体外增殖和侵袭,而Ang-1可能在其中发挥重要作用。