肺癌A549细胞诱导RAW264.7破骨细胞分化中AMPK信号通路的作用

目的:探讨AMPK信号通路在体外肺癌细胞诱导破骨细胞分化中的作用。方法:将肺癌A549细胞与RAW264.7细胞共培养后随机分为阴性对照组、阳性对照组、AICAR组,药物干预后行TRAP染色观察破骨细胞的分化,流式细胞仪观察破骨细胞细胞凋亡情况,qPCR检测破骨细胞AMPK、mTOR和CTSK mRNA的表达,Western blot检测破骨细胞AMPK、p-AMPK、mTOR和p-mTOR蛋白的表达。结果:与阴性对照组比较,AICAR组破骨细胞数明显减少,差异具有统计学意义（P＜0.05）;对诱导破骨细胞凋亡的作用无差异;上调AMPK的mRNA和蛋白表达,下调mTOR的mRNA和蛋白表达,差异具有统计学意义（P＜0.05）。结论:AICAR可以抑制肺癌细胞诱导破骨细胞分化,而AMPK/mTOR信号通路可能参与了肺癌细胞诱导破骨细胞分化过程。     

RNA干扰PLCE1基因表达对食管鳞癌细胞周期和凋亡的影响

目的：通过siRNA干扰PLCE1基因表达,检测PLCE1对食管鳞癌细胞增殖周期和凋亡的影响,以探讨PLCE1的致癌机制。方法：采用免疫组织化学方法检测食管鳞癌组织和癌旁正常组织中PLCE1蛋白的表达水平;PLCE1特异性siRNA转染食管鳞癌细胞,荧光显微镜观察转染效率;半定量RT-PCR法检测转染后PLCE1沉默效果;流式细胞术检测干扰后细胞周期变化及凋亡情况。结果：PLCE1在食管鳞癌组织的表达高于正常组织（P=0.000）;siRNA转染后PLCE1表达明显减少（P=0.000）;与对照组相比,PLCE1干扰后可致G0/G1期细胞阻滞（P=0.001）,细胞凋亡增多（P=0.000）。结论：PLCE1在食管鳞癌组织中有较高表达;沉默PLCE1后可抑制癌细胞的增殖,促进其凋亡。     

RNA干扰抑制Skp2表达对人喉癌细胞系Hep-2的影响

[目的]研究RNA干扰抑制Skp2表达对喉癌鳞状细胞p27表达、细胞增殖和凋亡的作用.[方法]利用脂质体将重组质粒转染Hep-2细胞,用慢病毒系统建立干扰Skp2基团的稳定细胞株;荧光实时定量PCR和Western blot法检测转染细胞株中Skp2和p27mRNA及其蛋白表达;采用MTr法和流式细胞仪检测转染细胞的增殖和凋亡情况.[结果]通过慢病毒siRNA技术,Skp2可持续稳定抑制Hep2喉癌细胞,siRNA可诱导抑制Skp2,增加p27表达,降低细胞增殖,增加喉癌细胞的凋亡.[结论]靶向Skp2基因的siRNA对Hep-2细胞的抑制作用可能是通过上调p27基因水平来实现的,Skp2是基因疗法治疗喉癌的有利靶点.     

慢病毒介导的siRNA干扰乳腺癌MCF-7细胞VEGF-C表达的实验

目的研究慢病毒载体介导的siRNA对乳腺癌MCF-7细胞系VEGF-C表达的敲减作用。方法构建慢病毒VEGF-C/siRNA载体,转染乳腺癌MCF-7细胞,采用Real-time PCR检测MCF-7细胞在转染前后VEGF-C的mRNA表达,计算其转染效率和VEGF-C敲减率。结果慢病毒VEGF-C/siRNA转染效率超过80%,其VEGF-C的mRNA表达敲减率达50%。结论慢病毒VEGF-C/siRNA转染率高,能有效敲减VEGF-C的mRNA表达。     

婆罗双树样基因4 shRNA干扰载体的构建及其对THP-1细胞的转染

 目的　构建针对婆罗双树样基因4（SALL4）的特异性shRNA干扰载体,并转染THP-1细胞,以期为更深入了解SALL4对白血病的作用,为后续研究提供实验工具。方法　设计4条针对不同靶点的SALL4特异性siRNA和一条阴性干扰siRNA,分子克隆方法构建pGPU6／GFP／Neo／SALL4 shRNA干扰载体,转染THP-1细胞,比较未转染细胞、阴性干扰转染细胞和4条SALL4 shRNA转染细胞的SALL4表达情况,找出干扰效果最好的SALL4 shRNA。结果　4种SALL4 shRNA均能有效转染THP-1细胞,实时定量PCR（RT-PCR）与Western blotting结果均显示针对靶点mRNA-1122的pGPU6／GFP／Neo／SALL4 shRNA-B干扰效果最佳,SALL4表达减少量最多（P＜0.05）。结论　成功构建SALL4 siRNA干扰载体,可选择SALL4 shRNA-B载体进一步完成对SALL4基因功能的研究工作。     

过表达FAF1基因慢病毒构建及对人胃癌细胞凋亡影响

目的：构建过表达FAs相关因子1（fas-associatedfactorl,FAF1）基因的慢病毒载体,探讨其对胃癌细胞凋亡的影响。方法：RT-PCR法扩增FAF1cDNA,亚克隆至GV218质粒中,经酶切及DNA测序鉴定正确以后,把含有FAF1基因的重组质粒与pHelper1．0和pHelper2．0载体质粒转染至293T细胞包装慢病毒。用包装好的慢病毒感染人胃癌细胞HGD27,RealtimePCR和蛋白质印迹法检测转染前后FAF1基因和蛋白的表达,流式细胞仪检测细胞凋亡的改变。结果：FAF1基因扩增产物长度为1996bp,酶切及测序结果鉴定GV218-FAF1质粒构建正确,成功包装的慢病毒滴度为2×10^8TU／mL。HGC-27细胞转染FAF1过表达慢病毒48h后,细胞形态由长梭形变得不规则。过表达FAF1慢病毒转染组FAF1基因mRNA表达水平2．436±0．538,是阴性对照组1．086±0．226的2．24倍,P〈0．001;是空载转染组1．182±0．381的2．06倍,P〈0．001。过表达FAF1慢病毒转染组FAF1蛋白相对表达水平1.515±0．377,显著高于阴性对照组的0,P〈0．001;也显著高于空载转染组的0,P〈0．001。过表达FAF1慢病毒转染组凋亡率（84．66±5．92）％显著高于阴性对照组的（4．60±3．80）％,P〈0．001;也显著高于空载转染组的（7．32±3．82）％,P〈0．001。结论：成功构建并鉴定FAF1基因过表达慢病毒载体,FAF1基因表达上调使胃癌细胞凋亡增加。     

跨膜接头蛋白PAG1过表达对皮肤鳞癌细胞A431运动能力的影响

目的 研究跨膜接头蛋白PAG1过表达对人皮肤鳞状细胞癌A431运动能力的影响。方法 构建PAG1-EGFP融合蛋白的慢病毒表达载体,采用反转录病毒转染的方法建立PAG1过表达的A431细胞株,实验分为3组：亲本细胞组（未进行基因转染的A431细胞）、对照组（A431细胞转染仅含EGFP阴性对照病毒）、实验组（A431细胞转染PAG1-EGFP病毒）。流式细胞术检测细胞转染率,实时荧光定量PCR及Western blot检测转染后PAG1 mRNA及其蛋白表达,进一步验证细胞转染成功与否;利用划痕修复实验、Transwell迁移实验、侵袭实验三种不同的方法检测PAG1基因的过表达是否会对皮肤鳞癌细胞的生长、迁移和侵袭能力产生影响。 结果 实验组和对照组目的基因病毒的转染表达率分别为（94.97±0.15）%、（94.60±0.35）%;实验组细胞中PAG1基因mRNA的表达量约为亲本细胞组的1.6倍（P=0.000）,转染后实验组中PAG1蛋白的相对表达水平明显增加（P=0.000）,建立了稳定过表达PAG1的A431细胞系;PAG1过表达明显降低A431细胞愈合率（P=0.000）;实验组A431细胞迁移、侵袭能力明显降低（P=0.001, P=0.000）。结论 PAG1的过表达能抑制人皮肤鳞癌细胞运动能力,影响肿瘤的浸润及远处转移。     

过表达THBS2对宫颈鳞癌SiHa细胞生物学特性的影响

目的 探讨血小板反应蛋白2（thrombospondin-2,THBS2）对人宫颈鳞癌SiHa细胞增殖、侵袭、迁移能力及裸鼠成瘤能力的影响。方法 用THBS2过表达慢病毒转染宫颈鳞癌SiHa细胞（THBS2-LV组）、空载病毒转染宫颈鳞癌SiHa细胞（NC组）,以正常培养的宫颈鳞癌SiHa细胞为空白对照组。转染后采用Western blot检测THBS2蛋白的表达,RT-qPCR检测THBS2 mRNA的表达,CCK-8法检测细胞增殖能力,流式细胞术检测细胞凋亡情况,Transwell实验和划痕实验检测细胞侵袭、迁移能力,裸鼠成瘤实验观察各组裸鼠皮下成瘤能力。结果 转染后,与NC组和空白对照组比较,THBS2-LV组细胞THBS2 mRNA和蛋白的表达量升高,细胞增殖、侵袭、迁移能力降低,而细胞凋亡率升高（P＜0.05）。裸鼠体内成瘤实验结果显示,接种THBS2-LV组细胞的裸鼠皮下成瘤能力和平均肿瘤体积均低于接种NC组和空白对照组细胞的裸鼠（P＜0.01）。结论 过表达THBS2能抑制宫颈鳞癌SiHa细胞增殖、侵袭、迁移和裸鼠皮下成瘤能力,THBS2表达上调能抑制宫颈鳞癌发生发展。     

CDK2AP1 基因过表达慢病毒载体的构建与鉴定

目的：构建CDK2AP1基因慢病毒过表达载体,感染人口腔鳞癌细胞系SCC-25细胞系中,为CDK2API基闲体内外实验研究奠定实验基础。方法：将pCDH—CMV—GFP慢病毒载体sall和XbaI酶切位点插入CDK2APl基因序列,构建pCDH—GFP—CDK2API慢病毒质粒。经PCR鉴定、测序验证CDK2API基因后,将其和慢病毒包装质粒混合物共同转染病毒包装细胞293TN,转染24小时后产生藿组病毒GFP—CDK2API慢病毒颗粒。经病毒浓缩纯化后,感染SCC-25口腔鳞痛细胞系并测定感染效率。结果：GFP—CDK2AP1病毒中携有转染正确的CDK2API璀因,感染人SCC-25细胞系后能稳定表达。结论：成功地在舌鳞癌细胞系SCC-25中构建了CDK2APl基因的重组慢病毒过表达载体,为研究其住头颈鳞癌的生物学功能奠定基础。     

NDV-HN致人肺腺癌A549细胞凋亡的实验研究

摘 要：［目的］ 探讨NDV-HN诱导人肺腺癌A549细胞凋亡的相关机制。［方法］ （1）构建包含绿色荧光素蛋白（GFP）及NDV-HN的慢病毒sfGFP-HN载体,用293V细胞包装慢病毒Lv-sfGFP-HN,用293V细胞进行空载质粒转染组（空载组）慢病毒包装,命名为Lv-sfGFP;（2）以空载组A549-sfGFP细胞和空白组A549为对照,用慢病毒转染方法建立稳定表达NDV-HN蛋白的A549细胞株,即A549-sfGFP-HN细胞株,RT-PCR、Western blot检测A549细胞NDV-HN蛋白的表达;（3）分别在A549-sfGFP-HN和A549两组细胞中加入顺铂,流式细胞术检测细胞凋亡;（4）在基因水平和蛋白水平上分别用RT-PCR和Western blot检测各组细胞凋亡相关蛋白Bcl-2的表达。［结果］ （1）Lv-sfGFP-HN和Lv-sfGFP慢病毒分别转染A549细胞后,只在转染组A549-sfGFP-HN细胞检测到NDV-HN蛋白。（2）转染组A549-sfGFP-HN细胞凋亡率明显高于空白组A549细胞 (P＜0.01),转染组A549-sfGFP-HN细胞加入顺铂后,其细胞凋亡率明显增加。（3）转染组A549-sfGFP-HN细胞与空载质粒转染组A549细胞和空白组A549细胞相比,凋亡相关蛋白Bcl-2表达量明显下调(P＜0.01)。［结论］ 慢病毒转染NDV-HN到A549细胞后导致A549-sfGFP-HN细胞出现凋亡,且与Bcl-2下调有关。转染NDV-HN的肺癌细胞联合使用抗癌药物顺铂,增加了肺癌细胞凋亡率。     

长链非编码RNA MT1JP通过FBXW7调控口腔鳞癌细胞生物学活性

目的:探讨长链非编码RNA-MT1JP(long non-coding RNA-MT1JP，LncRNA-MT1JP)通过FBXW7对口腔鳞癌细胞增殖、凋亡、迁移、侵袭等生物学活性的影响。方法:qRT-PCR检测LncRNA-MT1JP在Cal-27、SCC-4、TSCCA口腔鳞癌细胞系和正常口腔上皮细胞系HOK中的表达，将TSCCA细胞系分成LncRNA-MT1JP基因沉默组和对照组，随后采用LipofectamineTM 2000分别转染LncRNA-MT1JP-shRNA及对照序列LncRNA-MT1JP-NC；MTT法检测两组TSCCA细胞增殖；Transwell小室实验检测两组TSCCA细胞系迁移、侵袭能力；流式细胞仪检测两组TSCCA细胞系凋亡能力；Western blot法检测FBXW7基因蛋白的表达。结果:与正常口腔上皮细胞系HOK比较，LncRNA-MT1JP的相对表达量在口腔鳞癌细胞系Cal-27、SCC-4及TSCCA中显著增高(P<0.01)。TSCCA细胞系在转染24及48 h后，MT1JP基因沉默组与对照组比较OD值无显著的统计学差异(P>0.05)；但在72及96 h后OD值显著降低（P<0.05）。与对照组比较，MT1JP基因沉默组TSCCA细胞迁移与侵袭数目显著降低（P<0.01）、凋亡率以及FBXW7基因蛋白相对表达量均显著升高（P<0.05）。结论:LncRNA-MT1JP在口腔鳞癌细胞系呈高表达，MT1JP基因沉默有效抑制了TSCCA细胞系的增殖、迁移、侵袭，促进其凋亡，该作用可能与MT1JP基因沉默后上调抑癌基因FBXW7的表达有关。     

lncRNAXIST/miR-34a-5p/SIRT6 分子轴调控口腔鳞癌细胞的增殖及转移

[摘要] 目的：探究lncRNA XIST/miR-34a-5p/SIRT6 分子轴调控口腔鳞癌细胞增殖和转移及其分子机制。方法：收集2013年3 月至2018 年3 月在青岛市口腔医院就诊的OSCC患者47 例癌组织和癌旁组织标本,采用qPCR检测OSCC患者组织及细胞系中lncRNA XIST、miR-34a-5p、SIRT6 mRNA 的表达,WB检测OSCC 患者组织及细胞系中SIRT6、Ki67、pcDNA、cleaved-caspase3、cleaved-caspase8、E-cadherin、Vimentin 蛋白的表达,采用CCK-8 实验检测敲降lncRNA XIST对Cal-27 及Tca-8113 细胞增殖的影响,Transwell 小室法检测Cal-27 及Tca-8113 细胞迁移及侵袭;流式细胞术检测Cal-27 及Tca-8113 细胞凋亡情况,双荧光素酶报告基因检测lncRNA XIST与miR-34a-5p、miR-34a-5p 与SIRT6 靶向结合关系。结果：lncRNA XIST和SIRT6 在OSCC患者癌组织及细胞系中高表达（均P<0.05）,miR-34a-5p 则呈低表达（P<0.01）;敲降lncRNA XIST抑制OSCC细胞的增殖、迁移及侵袭并促进细胞凋亡（均P<0.01）,同时转染miR-34a-5p 抑制剂或pcDNA-SIRT6 载体作用则相反;敲降lncRNA XIST 促进OSCC细胞中增殖及转移相关蛋白表达（均P<0.01）,同时转染miR-34a-5p 抑制剂或pcDNA-SIRT6 载体作用则相反;lncRNA XIST 与miR-34a 靶向结合,miR-34a 与SIRT6 靶向结合;lncRNA XIST 通过靶向miR-34a-5p 上调SIRT6 表达（P<0.01）。结论：lncRNA XIST/miR-34a-5p/SIRT6 分子轴能够调控OSCC细胞增殖及转移,为OSCC治疗提供潜在靶点。     

miR-101靶向调控SPOP影响口腔鳞癌转移机制的研究

目的:探讨miR-101对口腔鳞状细胞癌（oral squamous cell carcinoma,OSCC）细胞SPOP基因的靶向关系及其对细胞迁移的影响。方法:使用Real time-PCR技术检测miR-101在OSCC细胞中的表达;利用生物信息分析预测SPOP可能是miR-101靶基因,将miR-101转染至Tca-8113细胞株,通过增强或者抑制miR-101的表达,利用蛋白质印迹实验检测SPOP表达,从而判断两者靶向关系;利用细胞迁移试验,通过miR-101表达强弱改变,判断Tca-8113细胞株迁移能力的变化情况。结果:miR-101在三个OSCC细胞株中表达均降低;在Tca-8113细胞株中增强miR-101表达,则SPOP表达下降,细胞迁移能力减弱;抑制miR-101表达,则SPOP表达升高,细胞迁移能力增强。结论:miR-101对OSCC细胞SPOP有靶向抑制作用,并且可以抑制OSCC细胞转移。     

The novel IκB kinase β inhibitor IMD-0560 prevents bone invasion by oral squamous cell carcinoma

Oral squamous cell carcinoma (OSCC) cells display significantly augmented nuclear factor-κB (NF-κB) activity, and inhibiting this activity suppresses malignant tumor characteristics. Thus, we evaluated the effect of IMD-0560, a novel inhibitor of IκB kinase (IKK) β that is under assessment in a clinical trial of rheumatoid arthritis, on bone invasion by the mouse OSCC cell line SCCVII. We examined the inhibitory effects of IMD-0560 on NF-κB activity and tumor invasion using human OSCC cell lines and SCCVII cells in vitro. Using a mouse model of jaw bone invasion by SCCVII cells, we assessed the inhibitory effect of IMD-0560 on jaw bone invasion, tumor growth, and matrix degradation in vivo. IMD-0560 suppressed the nuclear translocation of NF-κB and the degradation of IκBα in OSCC cells. IMD-0560 also inhibited invasion by suppressing matrix metalloproteinase-9 (MMP-9) production in OSCC cells. IMD-0560 protected against zygoma and mandible destruction by SCCVII cells, reduced the number of osteoclasts by inhibiting receptor activator of NF-κB ligand (RANKL) expression in osteoblastic cells and SCCVII cells, increased SCCVII cell death and suppressed cell proliferation and MMP-9 production in SCCVII cells. Based on these results, IMD-0560 may represent a new therapeutic agent for bone invasion by OSCC cells.     

Laminin-derived peptide AG73 regulates migration,invasion, and protease activity of human oral squamous cell carcinoma cells through syndecan-1 and β1 integrin

Squamous cell carcinoma is a prevalent head and neck tumor with high mortality. We studied the role played by laminin α1 chain peptide AG73 on migration, invasion, and protease activity of cells (OSCC) from human oral squamous cell carcinoma. Immunohistochemistry and immunofluorescence analyzed expression of laminin α1 chain and MMP9 in oral squamous cells carcinoma in vivo and in vitro. Migratory activity of AG73-treated OSCC cells was investigated by monolayer wound assays and in chemotaxis chambers. AG73-induced invasion was assessed in Boyden chambers. Invasion depends on MMPs. Conditioned media from cells grown on AG73 was subjected to zymography. We searched for AG73 receptors related to these activities in OSCC cells. Immunofluorescence analyzed AG73-induced colocalization of syndecan-1 and β1 integrin. Cells had these receptors silenced by siRNA, followed by treatment with AG73 and analysis of migration, invasion, and protease activity. Oral squamous cell carcinoma expresses laminin α1 chain and MMP9. OSCC cells treated with AG73 showed increased migration, invasion, and protease activity. AG73 induced colocalization of syndecan-1 and β1 integrin. Knockdown of these receptors decreased AG73-dependent migration, invasion, and protease activity. Syndecan-1 and β1 integrin signaling downstream of AG73 regulate migration, invasion, and MMP production by OSCC cells.     

血管内皮生长因子与膜型基质金属蛋白酶-1在口腔鳞状细胞癌表达及意义

[目的]检测血管内皮生长因子（VEGF）和膜型基质金属蛋白酶-1（MT1-MMP）在口腔鳞状细胞癌（OSCC）中的表达,并探讨其意义。[方法]采用免疫组织化学SP法检测VEGF、MT1-MMP在40例OSCC和10例口腔正常黏膜组织中的表达。[结果]VEGF和MT1-MMP在OSCC组织中的阳性表达率分别为67．50％和75．00％,在正常口腔黏膜组织中均阴性表达．差异有显著性（P〈0．001）。VEGF表达与OSCC的临床分期（P〈0．05）及淋巴结转移显著相关（P〈0．011,与肿瘤的分化程度无关。MT1-MMP表达与OSCC的分化程度（P〈0．05）及淋巴结转移显著相关（P〈0．01）,但与肿瘤的临床分期无相关性。VEGF与MT1-MMP表达呈正相关（rs=0．650,P〈0．001）。[结论]VEGF与MT1-MMP在OSCC发生发展中起重要作用,共同促进OSCC的浸润转移。     

G蛋白偶联受体激酶3在口腔鳞状细胞癌细胞增殖、迁移和侵袭中的作用及其可能的机制

目的:探讨沉默G蛋白偶联受体激酶3(G protein-coupled receptor kinase 3,GRK3)对口腔鳞状细胞癌(oral squamous cell carcinoma,OSCC)细胞增殖、迁移和侵袭的影响及其可能的机制.方法:利用Oncomine数据库分析GRK3在正常口腔组织及OSCC组织中...     

Regulation of HGF and SDF-1 expression by oral fibroblasts--implications for invasion of oral cancer

Invasion and metastasis of oral squamous cell carcinoma (OSCC) is dependent on signals received from stromal fibroblasts present in the surrounding connective tissue. The aim of this study was to investigate the regulation of expression of two important signaling molecules--HGF and SDF-1--by both stromal fibroblasts and their 'activated' form, myofibroblasts, and to determine the role of these two factors in stimulating OSCC cell invasion in vitro. Fibroblasts and myofibroblasts produced similar levels of HGF and SDF-1. IL-1alpha and OSCC cell conditioned medium both stimulated HGF and SDF-1 expression, while TGF-beta(1) inhibited production of each factor. Myofibroblast-derived conditioned medium stimulated OSCC cell invasion through matrigel. Blocking antibodies to both HGF and SDF-1 reduced the level of invasion. In fibroblast-free organotypic raft cultures, addition of HGF and SDF-1 stimulated OSCC cell invasion into the underlying collagen gel, although the pattern of invasion differed from that induced by fibroblasts. Fibroblast-derived HGF and SDF-1 appear to play central roles in the reciprocal interactions between OSCC cells and underlying stromal fibroblasts leading to the local invasion of oral cancer.     

Reduced expression of p27(Kip1) correlates with an early stage of cancer invasion in oral squamous cell carcinoma

Down-regulation of p27(Kip1) has been reported to correlate with poor survival of various carcinoma patients including oral squamous cell carcinomas (OSCCs). It is still unclear, however, at what stage of oral carcinogenesis the down-regulation of this protein occurs. In this study, therefore, we evaluated immunoexpression of p27(Kip1) protein in 17 cases of oral epithelial dysplasia and succeeding invasive OSCC in the same patient. We reported here that 88% cases showed high p27(Kip1) expression in dysplastic lesions, whereas 82% cases of succeeding invasive OSCC exhibited reduced expression. The reduction of p27(Kip1) expression was also observed in 16 of 19 (84%) early invasive lesions and well correlated with Ki-67 expression which is good indicator of cell proliferation. We also investigated immunoexpression of p53 protein of which abnormality has been known to occur during the early stage of OSCC development. Overexpression of p53 protein was demonstrated in 29% of dysplastic lesions, 42% of early invasive and 71% of invasive OSCCs. These findings suggest that abnormalities of both p53 and p27(Kip1) are involved in the carcinogenesis of OSCC, but they seem to play their role at different stages of oral cancer development, respectively. Reduced expression of p27(Kip1) may concern the cancer invasion directly or indirectly as well as abnormal proliferation.