Immune-related long noncoding RNA zinc finger protein 710-AS1-201 promotes the metastasis and invasion of gastric cancer cells

BACKGROUND Gastric cancer(GC)is a prevalent malignant tumor of the gastrointestinal system.ZNF710 is a transcription factor(TF),and zinc finger protein 710(ZNF710)-AS1-201 is an immune-related long noncoding RNA(lncRNA)that is upregulated in GC cells.AIM To assess the correlation between ZNF710-AS1-201 and immune microenvir-onment features and to investigate the roles of ZNF710-AS1-201 in the invasion and metastasis processes of GC cells.METHODS We obtained data from The Cancer Genome Atlas and Wujin Hospital.We assessed cell growth,migration,invasion,and programmed cell death using cell counting kit-8,EdU,scratch,Transwell,and flow cytometry assays.Quantitative real-time polymerase chain reaction(qRT-PCR)was used to identify the potential downstream targets of ZNF710-AS1-201.RESULTS In GC tissues with low ZNF710-AS1-201 expression,immunoassays detected significant infiltration of various antitumor immune cells,such as memory CD8 T cells and activated CD4 T cells.In the low-expression group,the half-maximal inhibitory concentrations(IC_(50)s)of 5-fluorouracil,cisplatin,gemcitabine,and trametinib were lower,whereas the IC_(50)s of dasatinib and vorinostat were higher.The malignant degree of GC was higher and the stage was later in the high-expression group.Additionally,patients with high expression of ZNF710-AS1-201 had lower overall survival and disease-free survival rates.In vitro,the overexpression of ZNF710-AS1-201 greatly enhanced growth,metastasis,and infiltration while suppressing cell death in HGC-27 cells.In contrast,the reduced expression of ZNF710-AS1-201 greatly hindered cell growth,enhanced apoptosis,and suppressed the metastasis and invasion of MKN-45 cells.The expression changes in ZNF710 were significant,but the corresponding changes in isocitrate dehydrogenase-2,Semaphorin 4B,ARHGAP10,RGMB,hsa-miR-93-5p,and ZNF710-AS1-202 were not consistent or statistically significant after overexpression or knockdown of ZNF710-AS1-201,as determined by qRT-PCR.CONCLUSION Immune-related lncRNA ZNF710-AS1-201 facilitates the metastasis and invasion of GC cells.It appears that ZNF710-AS1-201 and ZNF710 have potential as effective targets for therapeutic intervention in GC.Nevertheless,it is still necessary to determine the specific targets of the ZNF710 TF.

Expression of MAPK1 in cervical cancer and effect of MAPK1 gene silencing on epithelial-mesenchymal transition,invasion and metastasis

Objective:To discuss the expression of mitogen-activated protein kinase 1(MAPK1) in the cervical cancer and effect of MAPK1 gene silencing on epithelial-mesenchymal transition and invasion and metastasis.Methods:Immunohistoehemistry,western blot and RT-PCR method were employed to detect the expression of MAPKl protein and mRNA in cervical cancer tissue and adjacent normal tissue.The constructed siRNA-MAPKI was transferred into human cervical cancer HeLa cells using Lipofectamine^(?)2000.MTT method was used to detect the cell vitality,transwell method to detect the cell invasion,and western blot to detect the expression of matrix metalloproteinases(MMP)-2,MMP-9,tissue inhibitor of metalloproteinase(TIMP)-1,TIMP-2,zinc finger transcription factor(Snail),epithelialmesenchymal transition related protein(EMT) E-cadherin and vimentin in cells.Results:The expression of MAPKl protein and mRNA in the cervical cancer tissue was significantly higher than the one in the adjacent normal tissue(P<0.01):after transfecting the siRNA-MAPKI into the human cervical cancer HeLa cells through liposome,compared with the control group,its cell vitality was significantly decreased(P<0.01),cell invasion was significantly decreased(P<0.01);expressed of MMP2.MMP-9,Snail and vimentin was significantly decreased(P<0.01),and expression of TIMP-1,TIMP-2 and E-cadherin was significantly increased(/J<0.01).Conclusions:Because of the high expression of MAPKl in the cervical cancer tissue,the interference in the expression of MAPK1 can significantly inhibit the invasion and metastasis of cervical cancer HeLa cells,which is related to the interference in the expression of MMPs/TIMP and Snail-mediated generation of EMT.

Relationship between the Expression of MTA-1 Gene and the Metastasis and Invasion in Human Osteosarcoma

Summary：To compare the expression level of metastasis associated-1 （MTA 1 ） gene in high and low metastatic： human osteosarcoma cell lines and examine the relationship of MTA 1 expression and the metastasis potentiality of osteosarcoma cells, the expression of MTA 1 in MC-63 osteosarcoma cell lines with high and low metastasis potential was detected by semiquantitative TR-PCR. Boyden chamber invasion assay was used to evaluate the invasive capacity in vitro in two osteosarcoma cell lines, The low metastasis MG-63 cells were transfected with MTA 1 full-length cDNA expression plasmid by lipofectamine and the changes of MTA 1 expression and in vitro invasion potential were examined after the transfection. Our results showed that MG63 cell line with high metastasis potential expressed significantly higher MTA 1 than that of MG63 cells with low metastasis as reavealed by RT-PCR The invasion potential of low metastasis MG63 cell line was increased after MTA 1 gene transfection. It is concluded that there may be a relationship between MTA 1 and invasive potentiality of human osteosarcoma cells, and the mechanism of MTA 1 in osteosarcoma metastasis and its possible role in associated gene therapy deserve further study.

Relationship between expression of CD44v6 and nm23-H1 and tumor invasion and metastasis in hepatocellular carcinoma

AIM To detect the expression of CD44v6 mRNA and nm23-H1 mRNA in hepatocellular carcinoma (HCC) by in situ hybridization, and to evaluate the relationship between their expression and also relationship between their expressions and tumor invasion and metastasis.METHODS CD44v6 cDNA probe was synthesized with PCR technique and the nm23-H1 cRNA probe by in vitro transcription. The expression of CD44v6 mRNA and nm23-H1 mRNA was detected by in situ hybridization.RESULTS In group with high invasion and metastasis potential, the positive rates of CD44v6 mRNA and nm23-H1 mRNA were 80% (8/10) and 40% (4/10), in group with poor invasion and metastasis potential, they were 21.7% (5/23) and 91.3% (21/23). There was a positive correlation between the expression of CD44v6 mRNA and tumor invasion and metastasis potential in HCC (P＜0.01), and a reverse correlation between the expression of nm23-H1 mRNA and tumor invasion and metastasis potential (P＜0.01) and a reverse correlation in the expression between CD44v6 mRNA and nm23-H1 mRNA in HCC (P＜0.01).CONCLUSION Detection of CD44v6 mRNA and nm23-H1 mRNA may be useful for tumor invasion and metastasis in HCC.INTRODUCTIONCD44 is a cell surface transmembrane glycoprotein. As a kind of adhesive molecule, it participates in cell-cell and cell-matrix adhesion and interactions. Many studies revealed a correlation between high-level expression of CD44, especially CD44v and tumor invasion, metastasis and prognosis. The exon 6v containing isoforms may be an independent diagnostic parameter[1,2]. Some other studies, however, had different results[3,4]. Some researches showed a reverse correlation between the expression of nm23-H1 mRNA and tumor metastasis[5,6]. In order to evaluate the relationship between the expression of CD44v6 mRNA and nm23-H1 mRNA and tumor invasive and metastatic potential in HCC and to evaluate the relationship in the expression between CD44v6 mRNA and nm23-H1 mRNA, we detected their expression in HCC by in situ hybridization.

Relationship between CYP1A1 polymorphisms and invasion and metastasis of breast cancer

Objective:To investigate the relationship between CYPIA1 genetic polymorphisms and the invasion and metastasis of breast cancer.Methods:The CYP1A1 gene polymorphism(an T-C transversion at nucleotide position 3801)was detected by the polymerase chain reaction and restriction fragment length polymorphism in 80 cases with breast cancer and 60 samples of normal breast tissue.The difference in genotypic distribution frequency between the groups,the correlation between the genotypes and the factors related to prognosis were analyzed.Results:The incidence of homozygous and variant genotypes had no difference between the breast cancer group and controls group(P=0.746).The proportion of variant genotype increased as clinical stage(P=0.006)advanced,as well as with increased numbers of lymph node metastases(P=0.010).Conclusions:In patients with breast cancer there is a correlation between the CYP1A1 CC allele and some factors indicating poor prognosis,including more lymph node metastases as well as a more advanced clinical stage.

Effects of Silencing BAK1 and BCL2 Gene Expression on Proliferation, Invasion and Metastasis of HCC HepG2 Cells

Objective:To investigate the effects of silencing BAK1 and BCL2 gene expression on proliferation,invasion and metastasis of hepatocellular carcinoma(HCC)HepG2 cells.Methods:30 HCC HepG2 cells were randomly divided into groups and received the corresponding treatments,namely,control group,NC-siRNA group,BAK1-siRNA group,BCL2-siRNA group and BAK1+BCL2 group,with 6 strains in each group.ThenqRT-PCR,CCK8,Transwell chamber invasion and scratch assay were used to detect the expression,proliferation,invasion and metastasis of BAK1 and BCL2 genes in HepG2 cells.Results:The mRNA expression,cell proliferation rate,cell migration rate and cell invasion ability of BAK1 and BCL2 in HepG2 cells were lowest in the BAK1+BCL2 siRNA group,followed by BCL2-siRNA group,BAK1-siRNA group,NC-shRNA group and control group(P<0.05).The proliferation rate of HepG2 cells in the BAK1+BCL2 siRNA group decreased significantly with time(P<0.05).Conclusion:Silencing the expression of BAK1 and BCL2 genes can inhibit the proliferation and invasion of HCC HepG2 cells and promote their apoptosis.

ZYX promotes invasion and metastasis of gastric cancer cells via WNK1/SNAI1axis

Gastric cancer(GC)is the third most common cause of cancer death globally and a large portion of patients are diagnosed at advanced stages with cancer invasion and metastasis1,2.However,the mechanisms underlying the invasion and metastasis of GC remain to be delineated.ZYX plays critical roles in cell mobility via cytoskeleton regulation in various cell types.3 In this study,we further reported that ZYX promoted migration,invasion,and metastasis of GC cells.Mechanistically,ZYX promoted WNK1 activation and SNAl1 up-regulation,inducing epithelial-mesenchymal transition(EMT)to enhance the mobility of GC cells.Inhibition of WNK1 impaired the mobility of GC cells.Therefore,ZYX/WNK1 could be potential therapeutic targets for GC treatment.

LncRNA MALAT1通过靶向miR-146a调节PI3K/Akt信号通路影响胃癌细胞的增殖、迁移和侵袭

目的 探究长链非编码RNA(long non-coding RNA,LncRNA)肺腺癌转移相关转录子1(metastasis-associated lung adenocarcinoma transcript 1,MALAT1)通过调节miR-146a对胃癌(gastric cancer, GC)细胞的增殖、迁移和侵袭的影响及其机制。方法 收集GC组织和配对正常胃上皮组织,将GC细胞MNK-45分为空白对照(blank control, BC)组(未转染)、MALAT1 siRNA-NC组(转染MALAT1 siRNA-NC)、MALAT1 siRNA组(转染MALAT1 siRNA)、miR-146a mimics-NC组(转染miR-146a mimics-NC)、miR-146a mimics组(转染miR-146a mimics)、MALAT1 siRNA+miR-146a inhibitor-NC组(共转染MALAT1 siRNA+miR-146a inhibitor-NC)、MALAT1 siRNA+miR-146a inhibitor组(共转染MALAT1 siRNA+miR-146a inhibitor)。定量荧光PCR(qRT-PCR)检测胃组织或细胞中MALAT1、miR-146a表达量;CCK-8法和克隆形成实验检测细胞增殖能力;Transwell法检测细胞侵袭和迁移能力;RNA pull down实验、双荧光素酶报告实验分析MALAT1和miR-146a的结合情况;Western blot检测磷脂酰肌醇3激酶(phosphatidylinositol 3-kinase, PI3K)/蛋白激酶B(protein kinase B,Akt)通路蛋白及c-Myc、基质金属蛋白酶9(matrix metalloproteinase 9,MMP9)蛋白表达量。结果 转染MALAT1 siRNA可明显降低MNK-45细胞的MALAT1表达量,敲低MALAT1或过表达miR-146a可降低细胞活力、克隆能力、迁移和侵袭,增加miR-146a表达,降低PI3Kp85α、PI3Kp85β、c-Myc、MMP9蛋白表达量及p-Akt/Akt水平;MALAT1可结合并靶向下调miR-146a表达;低表达miR-146a可逆转敲低MALAT1对MNK-45细胞增殖、迁移和侵袭的抑制效应。结论 MALAT1可能作为ceRNA吸附并降解miR-146a,敲低MALAT1可上调miR-146a表达,并通过PI3K/Akt通路抑制GC细胞增殖、迁移和侵袭。

Expression transformation of claudin-1 in the process of gastric adenocarcinoma invasion

AIM: To investigate the relation of expression transfor-mation of claudin-1 with invasiveness and metastasis of gastric carcinoma. METHODS: By using immunohistochemistry, expres-sion of claudin-1 in mucosa and invasive front of 136 gastric adenocarcinoma cases and proliferative index (Ki-67) were detected and analyzed. RESULTS: In mucosa, the claudin-1 over-expression rate of mucinous adenocarcinomas (including signet-ring cell carcinomas) was the highest. It was nega-tively related with the differentiation but positively related with the invasiveness and metastasis of gastric cancer. In invasive front, the claudin-1 over-expression rate was positively related with the differentiation, in-vasiveness and metastasis of gastric carcinoma. The expression transformation of claudin-1 was found in gastric carcinoma. The expression of claudin-1 in inva-sive front was transformed in 28/136 gastric carcinoma cases. The transformation rate in highly differentiated tubular adenocarcinomas was the highest (51.5%, 17/33). The deeper was the invasiveness, the higher was the transformation rate. The claudin-1 expression transformation rate in serosa and omenta was signifi -cantly higher (92.9%) than in tunica muscularis of in-vasive gastric cancer cases, as well as in patients withlymph node metastasis than in those without lymph node metastasis. CONCLUSION: Up-regulation of claudin-1 expres-sion and its transformation in invasive and metastatic gastric carcinoma suggest that claudin-1 participates in the transformation of biological behaviors in neo-plasms. Further study is needed to elucidate the pre-cise mechanism and the relation of claudin-1 expres-sion with the neoplasm progress.

Mechanism of metastasis by membrane type 1-matrix metalloproteinase in hepatocellular carcinoma

AIM To investigate the precise role of membrane type 1-matrix metalloproteinase （NTI-NNP） in hepatocellular carcinoma （HCC） metastasis. METHODS- Human HCC cells Hep3B with overexpression of MTT-MMP were established by stable transfection, and compared with control cells carrying the empty vector. Cells were examined in vivo for their differences in the metastatic ability of athymic nude mice, and analyzed in vito for their differences in invasion ability by invasion chamber coated with Matrigel, adhesion towards collagen I and migration through culture chamber. Cell proliferation and apoptosis in adherent and suspension status were evaluated by MTr and flow cytometry analysis. RESULTS We found that overexpression of MT1-MMP could increase intrahepatic metastasis in nude mice with orthotopic implantation of HCC cells （incidence of 100% [MT1-MMP transfectants] vs 40% [vector control transfectants], P〈0.05）. NT1-MMP could also enhance cell invasion through Natrigel （107.7 vs 39.3 cells/field, P〈0.001）, adhesion towards matrix （0.30 vs 0.12 absorbance unit at 540 nm, P〈0.001）, cell migration （89.3 vs 39.0 cells/field, P〈0.001）, and cell proliferation （24.3 vs 40.5 h/doubling, P〈0.001）. We also observed that NTI-NNP supported cell survival （71.4% vs 23.9%, P〈0.001） with reduced apoptosis （43.7% vs51.0%, P〈0.05） in an attachment-free environment. CONCLUSION： MT1-MMP overexpression could enhance metastasis. In addition to its active role in matrix degradation during tumor invasion, MT1-MMP enhances tumor cell survival upon challenge of detachment, which is important during metastasis when cells enter the circulation.

MicroRNA-26b下调MALAT-1抑制乳腺癌MCF-7细胞恶性生物学行为的机制研究

目的 探索microRNA-26b(miR-26b)通过MALAT-1抑制乳腺癌MCF-7细胞恶性生物学行为的分子机制。方法 以乳腺癌细胞系MCF-7作为研究对象,采用慢病毒LV-miR-26b-ctrl和LV-miR-26b转染肿瘤细胞,逆转录聚合酶链反应检测MALAT-1、miR-26a和miR-26b的mRNA表达,平板克隆形成实验、CCK-8细胞增殖实验、软琼脂成瘤实验、细胞划痕实验、Transwell细胞侵袭实验分别检测肿瘤细胞的增殖、体外成瘤、迁移和侵袭能力。结果 E2组与Mock组MCF-7细胞24、48、72和96 h时吸光度值比较,经重复测量设计的方差分析,结果:(1)不同时间点吸光度值比较,差异有统计学意义(P <0.05);(2)两组吸光度值比较,差异有统计学意义(P <0.05),与Mock组比较,E2组72和96 h时细胞增殖能力较Mock组提高(P <0.05);(3)两组吸光度值变化趋势比较,差异有统计学意义(P <0.05)。与Mock组相比,E2组MALAT-1相对表达量升高(P <0.05),miR-26a、miR-26b mRNA相对表达量下降(P <0.05)。高表达miR-26b的乳腺癌患者的生存情况优于低表达miR-26b组,死亡风险更低(P <0.05),低表达miR-26a组患者的生存情况优于高表达miR-26a组(P <0.05),用Cox比例风险回归模型,将miR-26a作为一个独立的预后因素来比较,两组患者的死亡风险比较无差异(P>0.05)。与LV-miR-26b-ctrl组比较,LV-miR-26b-ctrl/E2组乳腺癌细胞的MALAT-1相对表达量升高(P <0.05),与LV-miR-26b-ctrl/E2组比较,LV-miR-26b/E2组乳腺癌细胞的MALAT-1相对表达量降低(P <0.05)。LV-miR-26b-ctrl组、LV-miR-26b-ctrl/E2组、LV-miR-26b/E2组细胞在24、48、72和96 h时吸光度值比较,经重复测量设计的方差分析,结果:(1)不同时间点吸光度值比较,差异有统计学意义(P <0.05);(2)各组吸光度值比较,差异有统计学意义(P <0.05),LV-miR-26b-ctrl/E2组72和96 h时细胞增殖能力明显较LV-miR-26b-ctrl组增强(P <0.05),LV-miR-26b/E2组72和96 h时细胞增殖能力较LV-miR-26b-ctrl/E2组降低(P <0.05);(3)各组吸光度值变化趋势比较,差异有统计学意义(P <0.05)。E2处理后的LV-miR-26b-ctrl肿瘤细胞增殖和体外成瘤能力增强。与LV-miR-26bctrl/E2组比较,LV-miR-26b/E2组肿瘤细胞的增殖和体外成瘤能力降低。在24 h时,LV-miR-26b-ctrl/E2组细胞划痕间隙较LV-miR-26b-ctrl组变窄,LV-miR-26b/E2组24 h时细胞的划痕间隙较LV-miR-26bctrl/E2组明显增宽。LV-miR-26b-ctrl/E2组Transwell小室下方的乳腺癌细胞数量较LV-miR-26b-ctrl组增多,LV-miR-26b/E2组的肿瘤细胞数量较LV-miR-26b-ctrl/E2组减少。结论 下调MALAT-1可能是miR-26b抑制乳腺癌恶性生物学行为的分子机制之一,miR-26b有望成为乳腺癌治疗的调控靶点。

Effect of siRNA Targeting MTA1 on Metastasis Malignant Phenotype of Ovarian Cancer A2780 Cells

Ovarian cancer is the fifth lethal gynecologic malignancy. Metastasis-associated gene 1 （MTA1） is overexpressed in many malignant tumors with high metastatic potential. This study investi- gated whether down-regulation of MTA1 expression by RNAi in A2780 ovarian cancer cells could affect proliferation, anoikis, migration, invasion and adhesion of the cells and to research the potential for MTA1 gene therapy of ovarian cancer. After transfection with effective Mtal gene siRNA, the effects on proliferation, anoikis, migration, invasion and adhesion of A2780 cells were tested by MTT assay, flow cytometry, wound-healing assay, Transwell assay and adhesion assay. Expression levels of PTEN, beta 1 integrin, MMP-9, phosphor-AKT （Ser473）, and total AKT activity were evaluated in control and transfected cells. The results showed that inhibition of MTA1 mediated by Mtal-siRNA transfection decreased the cell invasion, migration and adhesion, and induced the increased cell anoikis, but no significant difference was found in proliferation of A2780 cancer cells. In addition, beta 1 integrin, MMP-9, and phosphor-AKT protein levels were significantly down-regulated, while PTEN was significantly up-regulated. These results demonstrated that MTA1 played an important role in the cell metastasis in ovarian cancer. MTA1 could serve as another novel potential therapeutic target in ovarian cancer.

Ets-1和survivin在宫颈鳞状细胞癌中的表达研究

目的 探讨宫颈鳞状细胞癌(宫颈鳞癌)Ets-1和survivin表达与患者临床病理指标的关系。方法应用免疫组化EliVision^(TM) plus二步法检测72例宫颈鳞癌手术标本及30例癌旁宫颈组织Ets-1和survivin表达,分析其表达与患者年龄、癌灶大小、浸润深度、分化等级、TNM分期、术前淋巴转移、术后5年内复发转移7项指标的关系。结果 Ets-1阳性染色可见于细胞核及细胞质,survivin阳性染色多见于细胞质,少见于细胞核。癌组织Ets-1和survivin阳性率(分别为63.9%,72.2%)均显著高于癌旁组织(分别为13.3%,3.3%)(P<0.05)。患者年龄、癌灶大小均与Ets-1和Survivin表达阳性率无关(P>0.05);浸润深度、分化等级、TNM分期、术前淋巴转移、术后5年内复发转移5项指标均与Ets-1和survivin表达阳性率相关(P<0.05)。72例患者Ets-1和survivin共阳率为58.3%,共阴率为22.2%,两者表达呈正相关(r=0.49,P<0.05)。结论 Ets-1和survivin与宫颈鳞癌的发生发展密切相关,两者高水平表达预示癌组织侵袭能力强、分化等级低、病情发展快、淋巴转移早、患者预后差。

骨肉瘤患者癌组织中AHA1 mRNA和LOXL2 mRNA表达与侵袭转移基因mRNA表达的相关性及临床意义

目的研究骨肉瘤(osteosarcoma)患者癌组织中热休克蛋白90 ATP酶激活因子1(the activator of HSP90 ATPase-1,AHA1)和赖氨酰氧化酶样蛋白2(lysyl oxidase like-2 protein,LOXL2)表达与侵袭转移基因mRNA表达的相关性及临床意义。方法选取2016年2月~2017年3月华北医疗健康集团峰峰总医院诊治的90例骨肉瘤患者为研究对象。应用实时荧光定量PCR检测组织中AHA1 mRNA,LOXL2 mRNA及侵袭转移基因Wnt家族成员9A(Wnt9a)mRNA,锌指E盒结合同源盒1(Zinc finger E-box binding homeobox 1,ZEB1)mRNA,锌指E盒结合同源盒2(ZEB2)mRNA,N-钙黏素(N-cad)mRNA和波形蛋白(Vim)mRNA表达。采用Pearson相关分析,比较不同临床特征骨肉瘤患者AHA1 mRNA,LOXL2 mRNA表达差异。Kaplan-Meier生存分析影响AHA1 mRNA,LOXL2 mRNA表达对骨肉瘤患者预后的影响。单因素及多因素COX回归分析影响骨肉瘤患者预后的因素。结果骨肉瘤组织中AHA1 mRNA(3.16±0.59),LOXL2 mRNA(2.84±0.44)及侵袭转移基因Wnt9a mRNA(3.23±0.42),ZEB1 mRNA(2.73±0.39),ZEB2 mRNA(2.52±0.56),N-cad mRNA(2.71±0.65),Vim mRNA(2.81±0.73)表达均高于癌旁组织(1.10±0.21,0.95±0.18,0.79±0.15,0.64±0.11,0.98±0.19,0.68±0.14,0.72±0.15),差异具有统计学意义(t=31.206,37.716,51.903,48.931,24.706,28.964,26.605,均P<0.05)。骨肉瘤组织中AHA1 mRNA与LOXL2 mRNA表达呈显著正相关(r=0.712,P<0.05)。骨肉瘤组织中AHA1 mRNA,LOXL2 mRNA与侵袭转移基因Wnt9a mRNA,ZEB1 mRNA,ZEB2 mRNA,N-cad mRNA,Vim mRNA表达呈显著正相关(r=0.504~0.720,均P<0.05)。Eneeking分期Ⅲ期、有软组织浸润和有肺转移骨肉瘤组织中AHA1 mRNA,LOXL2 mRNA表达高于Eneeking分期Ⅰ~Ⅱ期、无软组织浸润和无肺转移患者,差异具有统计学意义(t=14.122~171.054,均P<0.05)。AHA1 mRNA高表达组和低表达组患者五年生存率分别为36.36%(16/44),78.26%(36/46)。AHA1 mRNA高表达组患者五年累积生存率明显低于低表达组,差异有统计学意义(Log-rankχ^(2)=16.081,P<0.05)。LOXL2 mRNA高表达组和低表达组患者五年生存率分别为34.88%(15/43),78.72%(37/47)。LOXL2 mRNA高表达组患者五年累积生存率明显低于低表达组,差异有统计学意义(Log-rankχ^(2)=15.880,P<0.05)。肺转移(OR=1.921,P<0.05),Eneeking分期Ⅲ期(OR=1.906,P<0.05),AHA1 mRNA高表达(OR=1.405,P<0.05),LOXL2 mRNA高表达(OR=1.733,P<0.05)是影响骨肉瘤患者不良生存预后的独立危险因素。结论骨肉瘤组织中AHA1 mRNA,LOXL2 mRNA表达升高,两者表达与侵袭转移基因表达有关,是影响骨肉瘤患者不良生存预后的独立危险因素。

Up-regulation of T-lymphoma and metastasis gene 1 in gastric cancer and its involvement in cell invasion and migration

Background T-lymphoma and metastasis gene 1 （Tiaml） produces a guanine nucleotide exchange factor （GNEF） that regulates guanosine triphosphatase, which transforms guanosine diphosphate to guanosine triphosphate. Recently published data indicate that Tiaml was associated with gastric cancer. The aim of this study was to investigate biological effects and potential mechanisms of Tiara1 in gastric carcinoma. Methods We analyzed the expression of Tiaml in 114 pair-matched gastric neoplastic and adjacent non-neoplastic tissues by quantitative real-time PCR. We investigated Tiaml expression and its prognostic value for gastric cancer. Furthermore, the functions of Tiaml over-expression were analyzed with stable-expression Tiara1 plasmid in human gastric cancer cell lines. Results Tiaml expression was significantly associated with cell differentiation and lymphatic metastasis; expression of Tiaml mRNA was up-regulated in gastric cancer compared to pair-matched adjacent non-tumor tissues. Analyses of surgical tissue samples and 5-year survival of gastric cancer patients showed that those with strong Tiaml expression had significantly shorter overall survival time than those with negative Tiaml expression. Ectopic expression of Tiaml promoted cell growth, migration and invasion of gastric cancer cells in vitro. Conclusions In gastric cancer cells, Tiaml affects multiple properties associated with acquisition of the metastatic phenotype, and may be a marker of gastric cancer progression and metastasis in a subset of cancer.

Silencing MTA1 by RNAi Reverses Adhesion, Migration and Invasiveness of Cervical Cancer Cells (SiHa) via Altered Expression of p53, and E-cadherin/β-catenin Complex

It has been reported that metastasis-associated gene 1 （Mta1） is overexpressed in many malignant tumors with high metastatic potential. In addition, some studies indicated that MTA1 participated in invasion, metastasis, and survival of cancer cells by regulating cell migration, adhesion and proliferation. But the role of MTA1 is unclear in vitro in the development of cervical cancer cells. This study investigated whether and how MTA1 mediated cell proliferation, migration, invasion and adhesion in cervical cancer. MTA1 expression level was detected by Western blot in two cervical cancer cell lines of different invasion potentials. The effects of MTA1 expression on SiHa cell apoptosis, cycle, proliferation, migration, invasion and adhesion were tested by flow cytometry, MTT, wound-healing assay, Transwell assay and adhesion assay, respectively. The expression levels of p53, E-cadherin, and β-catenin activity were evaluated in untreated and treated cells. The results showed that MTA1 protein expression was significantly higher in SiHa than in HeLa, which was correlated well with the potential of migration and invasion in both cell lines. Furthermore, the cell invasion, migration and adhesion capabilities were decreased after inhibition of MTA1 expression mediated by Mta1-siRNA transfection in SiHa. However, no significant differences were found in cell apoptosis, cycle, and proliferation. In addition, E-cadherin and p53 protein levels were significantly up-regulated, while β-catenin was significantly down-regulated in SiHa transfected with the siRNA. These results demonstrated that MTA1 played an important role in the migration and invasion of cervical cancer cells. It was speculated that the decreased migration and invasion capability by inhibiting the MTA1 expression in the SiHa cell line may be mediated through the altered expression of p53, and E-cadherin/β-catenin complex. MTA1 could serve as a potential therapeutic target in cervical cancer.

肝细胞癌SLeX和Arg-1表达的临床病理研究

目的探讨唾液酸化Lewis X(SLeX)和精氨酸酶-1(Arg-1)表达与肝细胞癌(HCC)临床病理特征及预后的关系。方法120例HCC手术切除标本及30例癌旁肝组织,应用EliVisionTMplus免疫组织化学染色二步法检测SLeX和Arg-1在HCC癌组织及癌旁肝组织中的表达,分析SLeX和Arg-1与HCC患者性别、年龄、肉眼类型、瘤体大小、分化等级、转移及5年生存期等临床病理特征的相关性。结果HCC癌组织SLeX和Arg-1阳性率分别为44.2%(53/120)和75.8%(91/120),癌旁肝组织分别为3.3%(1/30)和100.0%(30/30),差异有统计学意义(均P<0.05)。SLeX和Arg-1表达与性别、年龄、肉眼类型、瘤体大小无关(均P>0.05)。在低分化、有转移和5年内死亡患者中SLeX高表达,Arg-1低表达,呈负相关性(r=-0.31)。结论SLeX和Arg-1与HCC发生发展显著相关,SLeX表达上调和(或)Arg-1表达下调均预示HCC分化差、易转移、预后不良。

骨肉瘤组织RRBP1表达及其对细胞生物学特征的影响

目的探讨骨肉瘤组织中核糖体结合蛋白1(RRBP1)的表达,分析RRBP1基因对骨肉瘤U-2OS细胞生物学特征的影响。方法选取2014年6月—2020年6月在南阳市第二人民医院和郑州大学第一附属医院行手术治疗的骨肉瘤患者91例,收集骨肉瘤组织;选取行骨科手术且排除骨肿瘤的患者45例,收集正常骨组织。采用免疫组化法检测骨肉瘤组织和正常骨组织中RRBP1蛋白。对骨肉瘤患者进行术后随访,随访至2021年12月,记录患者生存情况。选取人骨肉瘤细胞系U-2OS,根据转染序列的不同分为si-RRBP1组(转染RRBP1干扰序列)、si-NC组(转染阴性对照序列)和空白对照组(仅加入转染试剂),以常规培养的U-2OS细胞作为对照。检测各组RRBP1 mRNA和蛋白表达,并检测各组细胞增殖活性、迁移和侵袭能力。结果骨肉瘤组织RRBP1蛋白阳性表达率高于正常骨组织(P<0.001)。Enneking分期ⅡB~Ⅲ期、有远隔转移的骨肉瘤患者RRBP1蛋白阳性率分别高于Enneking分期ⅡA期、无远隔转移的患者(P<0.05)。不同性别、年龄、肿瘤部位、组织学类型和肿瘤大小的骨肉瘤患者RRBP1蛋白阳性率差异均无统计学意义(P>0.05)。RRBP1阳性组生存率显著低于RRBP1阴性组(P=0.003)。si-RRBP1组细胞RRBP1 mRNA和蛋白相对表达量显著低于si-NC组、空白对照组细胞和U-2OS细胞(P<0.05)。与si-NC组和空白对照组比较,si-RRBP1组培养24、48、72和96 h的吸光度(A)值均降低(P<0.05)。si-RRBP1组迁移细胞数和侵袭细胞数均低于si-NC组和空白对照组(P<0.05)。结论骨肉瘤组织中RRBP1蛋白呈高表达,且与患者预后有关。下调RRBP1表达可抑制U-2OS细胞的增殖活性和迁移、侵袭能力。

LncRNA NNT-AS1通过miR-582-5p/MCL1对肝癌细胞侵袭和转移的影响

目的探讨LncRNA NNT-AS1通过miR-582-5p/MCL1轴对肝癌的侵袭和转移的影响。方法培养正常肝L-02细胞和肝癌细胞MHCC97H、LM3、SMCC7721、Huh7、Hep3B,选取肝癌Huh7细胞系,将细胞进行分组与转染;采用qRT-PCR检测各组细胞中NNT-AS1、miR-582-5p表达,WB检测各组细胞MCL1蛋白表达,RIP检测LncRNA NNT-AS1和miR-582-5p的结合情况,双荧光素酶报告基因实验验证miR-582-5p和MCL1靶向关系,Transwell实验检测细胞侵袭和转移能力。结果与正常肝细胞L-02比较,NNT-AS1在肝癌细胞系中高表达,miR-582-5p在肝癌细胞系中低表达;NNT-AS1和miR-582-5p沉默后,细胞中NNT-AS1和miR-582-5p表达显著降低,细胞侵袭和转移能力也明显减弱;LncRNA NNT-AS1可结合吸附miR-582-5p,MCL1是miR-582-5p的下游靶基因、且MCL1在肝癌细胞系中高表达;干扰LncRNA NNT-AS1或过表达miR-582-5p表达可抑制肝癌细胞侵袭和迁移;同时沉默NNT-AS1和过表达miR-582-5p,可显著降低细胞侵袭和迁移能力;干扰MCL1也可抑制肝癌细胞侵袭和迁移能力增强的现象。结论沉默LncRNA NNT-AS1可通过miR-582-5p作用,抑制MCL1表达从而抑制肝癌细胞侵袭和转移。

Decreasing Pin1 suppressed the properties of migratory and invasive in colorectal carcinoma SW620 cells

Objective:The aim of our study was to investigate the effect of Pin1 on the expression of MMP-2 and MMP-9 in human colorectal carcinoma SW620 cells. Methods: We constructed a eukaryotic expression vector of RNA interfering (shRNA) for Pin1 gene (pGenesil-1-Pin1), and then observed its expression in SW620 cells by Western blotting. The cells motility were tested by wound healing assay and Boyden chamber assay. The protein levels and activity of MMP-2 and MMP-9 were tested by Western blotting and Gelatin zymography in SW620 cells after transfected with pGenesil-1-PIN1. Results: pGenesil-1-PIN1 was successfully constructed, which was confirmed by sequencing. Silencing the Pin1 by RNAi significantly decreased the cells motility from 96.4±3.9 per field (×10 objective) to 52.7±4.4 per field (P<0.05, Student's t-test) for SW620 cells transfected with pGenesil-1-PIN1 (SW620/p-shRNA) in Boyden chamber assay, and reduced the MMP-2 and MMP-9 expressions and activity in SW620 cells. The protein relative levels of MMP-2 were 0.32±0.04 for SW620/p-shRNA, and 0.76±0.03 for SW620/p-Con; MMP-9 were 0.41±0.09 for SW620/p-shRNA, and 0.94±0.07 for SW620/p-Con (p<0.05). Conclusion: Inhibited Pin1 expression may contribute to the suppression of the invasive and metastatic capacity of colon cancer cells in vitro.