lncRNA SBF2-AS1 通过调控miR-140-5p/VEGFA 分子轴促进宫颈癌HeLa细胞上皮间质转化

目的：探讨lncRNA SBF2-AS1 通过调控miR-140-5p/血管内皮生长因子A（VEGFA）分子轴对宫颈癌HeLa 细胞上皮间质转化（EMT）的影响。方法：细胞培养和转染后分为NC、miR-140-5p mimic、miR-140-5p mimic+pcDNA-VEGFA、si-lncRNASBF2-AS1+pcDNA-VEGFA及si-lncRNA SBF2-AS1+miR-140-5p mimic组5 组。采用qPCR检测lncRNA SBF2-AS1 在宫颈癌组织及细胞系中的表达水平,双荧光素酶报告基因验让lncRNA SBF2-AS1、miR-140-5p 与VEGFA的靶向关系,WB检测HeLa细胞中VEGFA及EMT标志物N-cadherin、Vimentin 和E-cadherin 的表达水平,Transwell 实验检测HeLa细胞侵袭和迁移能力。结果：lncRNASBF2-AS1 在宫颈癌组织及细胞系中高表达（P<0.05 或P<0.01）,lncRNA SBF2-AS1 靶向结合miR-140-5p,且VEGFA 是miR-140-5p 的靶基因（P<0.05）。敲降lncRNA SBF2-AS1 抑制HeLa细胞侵袭、迁移及EMT。进一步实验证实,lncRNA SBF2-AS1通过miR-140-5p 上调VEGFA的表达水平,从而促进HeLa 细胞侵袭、迁移及EMT（P<0.05 或P<0.01）。结论：lncRNA SBF2-AS1通过miR-140-5p/VEGFA分子轴促进HeLa细胞EMT。     

毛兰素通过Hedgehog 信号通路调控结直肠癌HT29 细胞的上皮间质转化和血管生成

目的： 基于Hedgehog 信号通路探讨石斛提取物毛兰素（erianin,ER）抑制结直肠癌HT29 细胞上皮间质转化（EMT）和血管生成的作用机制。方法: 将HT29 细胞分为空白对照组、ER-L（25 μg/mL）组、ER-M（50 μg/mL）组、ER-H（75 μg/mL）组、 ER-H（75 μg/mL）+PM（Hedgehog 通路激活剂,1.5 μmol/L）组。MTT法检测细胞增殖活力,克隆形成实验检测细胞克隆形成能力,划痕实验和Transwell 实验检测细胞迁移与侵袭能力,血管拟态形成实验检测血管生成能力,WB法检测与EMT进程、Hedgehog信号通路和拟态血管生成相关蛋白质的表达。结果: HT29 细胞增殖活性随着ER质量浓度的升高而逐渐降低（P<0.05）;与空白对照组比较,ER各组细胞克隆形成率、迁移与侵袭能力、血管形成能力、间质标志蛋白（N-cadherin、vimentin）、血管生成相关蛋白（VEGF、VE-cadherin）及Hedgehog 通路相关蛋白（SHH、GLI1、SMO、c-Myc）表达均显著下降（均P<0.05）,上皮标志蛋白（E-cadherin）、Hedgehog 通路中融合蛋白抑制剂（SUFU）蛋白表达均显著上升（均P<0.05）;PM 处理在一定程度上逆转了ER 对于HT29细胞增殖、EMT和血管生成的抑制作用（均P<0.05）。结论: ER可以抑制结直肠癌HT29细胞的增殖、迁移与侵袭、EMT和血管生成,其机制可能与抑制Hedgehog信号通路激活有关。     

过表达miR-129-5p通过靶向MAPK1抑制宫颈癌HeLa细胞恶性生物行为

[摘要] 目的：探讨miR-129-5p 对宫颈癌HeLa细胞侵袭、迁移和EMT的作用及其机制。方法：选取宫颈癌HeLa细胞,利用生物信息学预测软件筛选miR-129-5p 的靶基因,双荧光素酶报告基因验证miR-129-5p 和MAPK1 的靶向关系。将miR-129-5p mimic、miR-129-5p inhibitor 和pcDNA-MAPK1 单独或联合转染到HeLa细胞,用qPCR检测HeLa细胞中miR-129-5p 和MAPK1 的表达水平,用Transwell、划痕愈合实验分别检测HeLa 细胞的侵袭、迁移能力,WB检测细胞中E-cadherin、N-cadherin、MAPK1、STAT3 和Bcl-xL的表达。构建裸鼠HeLa细胞皮下移植瘤模型,观察miR-129-5p 过表达对移植瘤生长的影响,WB检测移植瘤组织中EMT及MAPK1 通路相关蛋白的表达。结果：miR-129-5p 与MAPK1 在3’UTR区存在结合位点,过表达miR-129-5p 靶向抑制MAPK1（P<0.01）。与对照组相比,miR-129-5p mimic 组侵袭细胞数目减少（P<0.01）,划痕愈合率降低（均P<0.01）;细胞中Ecadherin表达上调而N-cadherin、MAPK1、STAT3 和Bcl-xL 表达下调（均P<0.01）;共转染MAPK1 可逆转上述现象。成功建立裸鼠HeLa 细胞移植瘤模型,与对照组相比,miR-128-3p mimic 组肿瘤质量减轻（P<0.01）;瘤组织中E-cadherin 表达水平上调而N-cadherin、MAPK1、STAT3 和Bcl-xL 的表达下调（均P<0.01）。结论：过表达miR-129-5p 通过靶向MAPK1 抑制宫颈癌HeLa细胞的侵袭、迁移和EMT。     

SOX9 通过Wnt/β-catenin 途径驱动非小细胞肺癌A549 细胞的上皮-间充质转化

目的：探究SRY相关的高迁移率族盒9（SOX9）通过Wnt/β-连环蛋白（β-catenin）途径促进非小细胞肺癌（NSCLC）A549 细胞上皮-间充质转化（EMT）的机制。方法：将A549 细胞分为OE-NC组、OE-SOX9 组、OE-SOX9+XAV-939 组。其中OESOX9组通过转染SOX9 pcDNA质粒上调SOX9 的表达水平;OE-SOX9+XAV-939 组在转染SOX9 pcDNA质粒的同时在培养基中加入β-catenin 抑制剂XAV-939（1.0 μmol/L）。用qPCR检测SOX9 mRNA表达水平,CCK-8 法检测A549 细胞增殖能力,划痕愈合实验检测A549 细胞迁移能力,Transwell 小室实验检测A549 细胞的侵袭能力,WB实验检测SOX9、β-catenin、E-钙粘蛋白（E-cadherin）、γ-连环蛋白（γ-catenin）、N-钙黏蛋白（N-cadherin）、波形蛋白（vimentin）表达水平。结果：转染后OE-SOX9 组和OE-SOX9+XAV-939 组的SOX9 mRNA和蛋白的水平显著高于OE-NC 组（均P<0.05）,且OE-SOX9 组和OE-SOX9+XAV-939 组比较无显著差异（P>0.05）。OE-SOX9 组细胞增殖、侵袭和迁移能力显著高于OE-NC组,而OE-SOX9+XAV-939 组显著低于OE-SOX9 组（均P<0.05）。OE-SOX9 组β-catenin 蛋白水平显著高于OE-NC 组,而OE-SOX9+XAV-939 组β-catenin 蛋白的水平低于OE-SOX9 组（均P<0.05）。与OE-NC组比较,OE-SOX9 组的上皮细胞表型标志物E-cadherin、γ-catenin 水平下调并且间充质细胞表型标志物N-cadherin、vimentin 上调,而OE-SOX9+XAV-939 组E-cadherin、γ-catenin 高于OE-SOX9 组,且N-cadherin、vimentin 低于OE-SOX9组（均P<0.05）。结论：SOX9 可通过激活Wnt/β-catenin通路促进NSCLC A549 细胞的增殖、迁移和EMT。     

lncRNA MALAT1/miR-141-3p/ZEB1 分子轴调控胃癌SGC7901 细胞的侵袭、迁移及上皮间质转化

[摘要] 目的：探究lncRNA MALAT1/miR-141-3p/ZEB1 分子轴对胃癌（GC）SGC7901 细胞侵袭、迁移及上皮间质转化（EMT）的调控作用。方法：收集2014 年4 月至2017 年5 月武汉商职医院普外科手术切除的GC组织（非坏死部分）和配对癌旁组织（距肿瘤组织>5 cm）标本38 例,同时选取正常胃上皮细胞GES1 及GC细胞系SGC7901、HGC27、BGC823、MKN45 和MKN28。qPCR实验检测MALAT1、miR-141-3p 在GC组织和细胞系中的表达水平,CCK-8 和Transwell 实验检测敲降MALAT1 对SGC7901 细胞增殖、迁移和侵袭的影响,WB 实验检测ZEB1、E-cadherin、N-cadherin 和Vimentin 的表达情况。双荧光酶素报告基因验证MALAT1、miR-141-3p 和ZEB1 的靶向关系,CCK-8 和Transwell 实验检测MALAT1/miR-141-3p/ZEB1 分子轴对SGC7901 细胞生物学行为的影响。结果：MALAT1 在GC组织和细胞系中高表达（P<0.05 或P<0.01）。敲降MALAT1 显著抑制了SGC7901 细胞增殖、迁移、侵袭及EMT（P<0.05 或P<0.01）;MALAT1 与miR-141-3p、miR-141-3p 与ZEB1 均具有直接靶向关系;进一步研究表明,同时过表达miR-141-3p 和MALAT1 或ZEB1 能够逆转miR-141-3p 对SGC7901 细胞生物学行为的抑制作用。结论：MALAT1通过靶向下调miR-141-3p 对ZEB1 的抑制作用,进而促进SGC7901 细胞侵袭、迁移及EMT。     

miR-101通过靶向FGF2抑制非小细胞肺癌的迁移和侵袭

目的：探究microRNA-101 (miR-101)通过靶向成纤维细胞生长因子2（fibroblast growth factor 2,FGF2）抑制非小细胞肺癌（non-small cell lung cancer,NSCLC）细胞迁移和侵袭的分子机制。方法：采用qPCR法检测人正常肺上皮细胞BEAS-2B和NSCLC细胞系A549、H661和SK-MES-1,以及转染后A549细胞miR-101和FGF2的表达水平。分别将miR-NC、miR-101 mimics、miR-IN-NC、miR-101 inhibitor或pcDNA-3.1空质粒、pcDNA-FGF2转染至A549细胞,运用划痕愈合实验和Transwell小室实验,检测A549细胞中过表达miR-101和FGF2对NSCLC细胞迁移和侵袭能力的影响,采用Western blotting（WB）法检测各组A549细胞中FGF2、E-cadherin、N-cadherin、Vimentin、ERK1/2和p-ERK1/2的表达水平。结果：miR-101在NSCLC细胞系中的表达水平明显低于正常肺上皮细胞（均P<0.05）,而以A549细胞中表达水平为最低。过表达miR-101可明显抑制A549细胞的迁移（P<0.05）和侵袭（P<0.01）,且使细胞中E-cadherin的表达增多（P<0.05）而Vimentin（P<0.05）、N-cadherin（P<0.01）和p-ERK1/2（P<0.05）的表达水平降低。抑制miR-101表达后,可以显著增强A549细胞的迁移和侵袭能力（均P<0.05）,引起细胞中E-cadherin表达明显降低而 Vimentin、N-cadherin 和 p-ERK1/2 表达水平增高（均 P<0.05）。采用 WB 法和双荧光素酶报告基因实验验证了 FGF2 是miR-101的直接靶基因,且过表达FGF2后显著增强A549细胞的迁移和侵袭能力（均P<0.01）,以及减少细胞中E-cadherin的表达（P<0.01）而增加Vimentin（P<0.01）、N-cadherin（P<0.05）和p-ERK1/2（P<0.05）表达水平。与单独过表达FGF2组相比,共同过表达miR-101和FGF2组A549细胞迁移和侵袭能力明显减弱（均P<0.01）,其E-cadherin的表达增多（P<0.01）而Vimentin（P<0.01）、N-cadherin（P<0.05）和p-ERK1/2表达水平下降（P<0.01）。结论：miR-101通过调控靶基因FGF2抑制NSCLC A549细胞的上皮间质转化（EMT）过程及ERK信号通路,进而抑制NSCLC细胞的迁移和侵袭。     

miR-9通过靶向E盒结合锌指蛋白2调控小细胞肺癌的恶性生物学行为及其可能的机制

目的：探讨 miR-9 通过靶向 E 盒结合锌指蛋白 2（zinc finger E-box binding homeobox 2,ZEB2）对小细胞肺癌（small cell lung cancer,SCLC）细胞生物学行为的调控作用,分析miR-9在SCLC中的作用及其工作机制。方法：采用qPCR、WB和免疫组化方法检测于2018年2月至2019年11月于河北医科大学第四医院肿瘤内科接受手术治疗的67例SCLC患者癌组织及癌旁组织中ZEB2的表达。采用TargetScan预测miR-9的潜在靶基因并通过双荧光素酶报告基因试验、qPCR和WB法进行验证。CCK-8法、流式细胞术和Transwell实验检测miR-9和ZEB2 过表达对 NCI-H446 的生物学行为影响,WB法检测对细胞中E-cadherin,N-cadherin和Vimentin蛋白表达的影响。利用miR-9过表达NCI-H446细胞构建SCLC裸鼠移植瘤模型,观察miR-9对裸鼠移植瘤生长的影响。结果：SCLC组织中ZEB2的mRNA和蛋白表达水平明显高于癌旁正常组织（P<0.01）。miR-9在ZEB2的3'' UTR上具有潜在的结合位点,与对照组相比,miR-9过表达组NCI-H446细胞中ZEB2的mRNA和蛋白表达水平明显降低（P<0.01）,细胞增殖、迁移和侵袭能力均显著下降（P<0.05或P<0.01）,促EMT蛋白表达减少,而同时过表达ZEB2能够逆转上述影响。体内实验中,miR-9过表达组移植瘤体积、重量均明显低于对照组（P<0.05或P<0.01）。miR-9组裸鼠肿瘤组织中和ZEB2蛋白的表达均较对照组明显降低（P<0.01）。结论：miR-9通过靶向调控ZEB2从而抑制SCLC细胞的生物学行为以及NCI-H446裸鼠移植瘤的生长。     

MicroRNA-29a靶向抑制PTEN基因诱导非小细胞肺癌细胞上皮间质转化的机制研究

目的:探讨microRNA-29a（miR-29a）及其靶蛋白PTEN在TGF-β1诱导非小细胞肺癌（non-small cell lung cancer,NSCLC）细胞上皮间质转化（epithelial-mesenchymal transition,EMT）中的作用机制。方法:选择A549细胞经终浓度为10 ng/ml TGF-β1诱导48 h后,分为Blank组（不转染任何序列）、阴性对照（negative control,NC）组（转染阴性对照序列）、IN组（转染miR-29a inhibitors）、siRNA组（转染PTEN-siRNA）和IN+siRNA组（共转染miR-29a inhibitors和PTEN-siRNA）。普通显微镜观察各组细胞形态学变化;免疫荧光检测各组细胞中E-cadherin表达水平;qRT-PCR法检测EMT相关因子及PTEN mRNA表达水平;Western blotting法检测转染后EMT相关因子、PTEN、Akt和p-Akt蛋白的表达;划痕实验检测各组细胞迁移能力。构建裸鼠移植瘤模型,观察肿瘤生长,免疫组化检测裸鼠肿瘤组织中PTEN及EMT相关因子蛋白表达水平。结果:A549细胞转染miR-29a inhibitors后TGF-β1诱导细胞的上皮间质转化显著受到抑制,N-cadherin、Vimentin及Slug的mRNA和蛋白表达水平在IN组中显著低于Blank组和NC组,但在siRNA组和IN+siRNA组中显著上调（均P<0.05）。与Blank组和NC组相比,IN组PTEN mRNA和蛋白表达水平明显升高,且p-Akt的表达显著降低,细胞迁移率显著下降,而siRNA组和IN+siRNA组PTEN mRNA和蛋白表达明显降低,p-Akt的表达显著上升,细胞迁移率显著升高（均P<0.05）。裸鼠移植瘤实验结果显示与Blank组和NC组相比,IN组肿瘤生长较慢,重量降低,E-cadherin和PTEN蛋白表达显著升高,N-cadherin、β-catenin、Vimentin、Slug蛋白表达显著降低（均P<0.05）。结论:TGF-β1能诱导NSCLC细胞发生EMT,且能上调miR-29a并抑制PTEN的表达水平;抑制miR-29a的表达水平可能通过上调靶基因PTEN,促进Akt磷酸化,抑制EMT的发生。     

甘草酸通过调控miR-142/ZEB1 分子轴影响非小细胞肺癌HCC827 和A549 细胞的恶性生物学行为

目的：探讨甘草酸（GA）通过调控miR-142/锌指E 盒结合的同源盒蛋白1（ZEB1）分子轴对非小细胞肺癌（NSCLC）HCC827 和A549 细胞增殖、侵袭和迁移的影响。方法：HCC827 和A549 细胞培养和转染完成后,分成4 组：NC组（未经转染+3mmol/L GA）、miR-142 inhibitor 组（敲降miR-142+3 mmol/L GA）、pcDNA3.1-ZEB1 组（过表达ZEB1+3 mmol/L GA）和pcDNA3.1-ZEB1+miR-142 mimic 组（过表达ZEB1 及miR-142+3 mmol/L GA）。采用qPCR检测不同浓度GA处理后HCC827 和A549 细胞中miR-142 的表达水平,WB实验检测HCC827 和A549 细胞中ZEB1 蛋白的表达水平,采用MTT和Transwell 检测HCC827 和A549细胞的增殖、侵袭和迁移能力,采用双荧光素酶报告基因检测miR-142 与ZEB1 的靶向关系。结果：GA显著抑制HCC827 和A549 细胞的增殖、侵袭和迁移,且显著上调miR-142 的表达水平（P<0.05 或P<0.01）;miR-142 通过靶向结合ZEB1 的3''-UTR 区域下调ZEB1 的表达水平（P<0.05 或P<0.01）;进一步实验证实,GA通过上调miR-142 抑制ZEB1 的表达水平,进而抑制HCC827 和A549 细胞增殖、侵袭和迁移（P<0.05 或P<0.01）。结论：GA能够抑制NSCLC HCC827 和A549 细胞增殖、侵袭和迁移,其机制为GA通过上调miR-142对ZEB1 的抑制作用,从而抑制HCC827和A549 细胞的恶性生物学行为。     

异体血小板输注对人肺癌A549细胞迁移和侵袭的影响及其作用机制

目的：观察输注的异体血小板对人肺癌细胞A549侵袭、转移的影响,初步探讨其作用机制。方法：选取2017年1月至 2018 年 12 月于河北医科大学第四医院化疗科就诊输注血小板的 89 例晚期肺癌患者,实验分为 Ctrl 组（与培养液共孵育的A549细胞组）、Before组和After组（分别指与输注血小板前和后患者血浆共孵育的A549细胞组）。通过划痕实验和Transwell实验检测与输血小板前后患者血浆共孵育的A549细胞的迁移和侵袭能力,采用Western blotting法检测金属基质蛋白酶（MMPs）及其抑制剂（TIMPs）和上皮-间质转化（EMT）相关蛋白E-cadherin、N-cadherin及Vimentin,以及血管内皮生长因子VEGF及受体2（VEGFR2）的表达水平。结果：After 组的 A549 细胞的划痕愈合率明显高于 Before 组及 Ctrl 组（[ 73.67±2.60）% vs（58.33±2.33）%、（35.33±2.03）%,P<0.01或P<0.05],Before组与Ctrl组比较也具有显著差异（P<0.05）。细胞迁移实验结果显示,After组的穿膜细胞数明显高于Ctrl组和Before组（[ 69.67±7.84）vs（18±2.08）、（39.33±2.03）个,均P<0.01]。细胞侵袭实验显示,After组的穿膜细胞数明显高于Ctrl组和Before组（[ 59.34±3.46）vs（18.34±1.56）、（37.58±2.79）个,均P<0.01]。A549细胞与输注血小板前、后的血浆共孵育48 h后,MMP9、MMP2的表达均升高（P<0.05）而其抑制剂 TIMP1和TIMP2的水平均下降（P<0.01）;EMT相关蛋白N-cadherin、Vimentin表达升高（P<0.05）而E-cadherin 表达降低（P<0.01）;血管形成相关蛋白VEGF、VEGFR2的表达均升高（P<0.05）。结论：输注异体血小板能促进肺癌A549细胞的侵袭和转移,其作用机制可能与调节EMT、金属基质蛋白酶及血管生长因子相关蛋白的表达有关。     

Expression of seven-in-absentia homologue 1 and hypoxia-inducible factor 1 alpha: Novel prognostic factors of nasopharyngeal carcinoma

Nasopharyngeal carcinoma (NPC) is an EBV-associated cancer. We analysed Siah1 expression as well as LMP1 and HIF1α expression by immuno-histochemical staining in 74 NPC biopsy specimens and found that the expression of Siah1 was significantly correlated with advanced tumour status and stage. Moreover, Siah1-positive and HIF1α-positive cases had significantly worse prognoses. The expression score for LMP1 was remarkably correlated with that of Siah1, whereas there was little correlation between LMP1 expression and the other markers evaluated. This is the first study to evaluate the pattern and clinical significance of Siah1 and HIF1α expression in NPC, and such an evaluation is valuable for identifying those patients at a high risk for a poor prognosis.     

Ⅱ相代谢酶基因多态性与广西肝癌发生的关系

目的　探讨Ⅱ相代谢酶谷胱甘肽硫转移酶M 1、T 1(GSTM 1、GSTT1)及微粒体环氧化物水解酶 (mEH )基因多态性与广西肝癌易感性的关系 ,以及基因与基因间的相互作用。方法　采用多重PCR、PCR RFLP技术 ,对广西地区 10 5例肝癌患者及 15 1例健康对照的GSTM 1、GSTT 1、mEH基因型进行检测。结果　GSTM 1基因缺失率在病例组与对照组中分别为 64 .76%和5 0 .99% ,两者比较有显著性差异 (P <0 .0 5 ,OR =1.77) ;病例组GSTT 1基因缺失率 (4 0 .95 % )高于对照组 (3 3 .11% ) ,mEH 3种基因型频率在病例组分别为 2 7.62 %、2 1.90 %、5 0 .48% ,对照组则分别为 2 1.19%、3 4.44 %、44 .3 7% ,两组比较无显著性差异 (P >0 .0 5 ) ;GSTM 1、T 1基因同时缺失的个体患肝癌的危险性增大了 1.2 2倍。结论　GSTM 1、T1基因同时缺失是肝癌的易感因素 ,可作为肝癌高危人群筛选的标记物。     

黏蛋白1多肽通过small-MUC1蛋白抑制肿瘤细胞生长

目的：探讨黏蛋白1（mucin 1,MUC1）串联重复序列多肽(简称黏蛋白1多肽,MUC1多肽)对肿瘤细胞生长抑制的作用机制。方法：MUC1多肽与多种肿瘤细胞Jurkat、Raji、U937、MCF7、SMMC7721及活化的T细胞、小鼠巨噬细胞RAW264.7共同培养,观察MUC1多肽对上述细胞生长的影响;建立BABL/c小鼠Jurkat细胞皮下移植瘤动物模型,应用MUC1多肽进行治疗;采用GST免疫沉降实验鉴定与MUC1多肽结合的肿瘤细胞表面蛋白。结果：MUC1多肽对Jurkat、Raji、U937、MCF7和SMMC7721细胞的生长均有抑制作用,对活化的T细胞和小鼠RAW264.7细胞生长无明显抑制作用。MUC1多肽对BABL/c小鼠皮下Jurkat细胞移植瘤的生长均有明显抑制作用（P<0.05）。GST免疫沉降实验显示,Jurkat 和MCF7细胞裂解上清中与MUC1多肽结合的蛋白可与两种抗MUC1串联重复序列抗体（GP1.4和HMPV）及抗胞内段抗体（Ab5）发生反应,相对分子质量大约115 000,提示可能是MUC1新的同种型,命名为small MUC1（sMUC1）。结论：MUC1多肽可通过与肿瘤细胞表面small MUC1蛋白的相互作用向细胞传导生长抑制信号     

Upregulated long non-coding RNA AFAP1-AS1 expression is associated with progression and poor prognosis of nasopharyngeal carcinoma

Altered expression of long noncoding RNAs (lncRNAs) associated with human carcinogenesis. We performed a cDNA microarray analysis of lncRNA expression in 12 cases of nasopharyngeal carcinoma (NPC) and 4 non-tumor nasopharyngeal epitheliums. One lncRNA, actin filament associated protein 1 antisense RNA1 (AFAP1-AS1), was identified and selected for further study. AFAP1-AS1 expression was upregulated in NPC and associated with NPC metastasis and poor prognosis. In vitro experiments demonstrated that AFAP1-AS1 knockdown significantly inhibited the NPC cell migration and invasive capability. AFAP1-AS1 knockdown also increased AFAP1 protein expression. Proteomic and bioinformatics analyses suggested that AFAP1-AS1 affected the expression of several small GTPase family members and molecules in the actin cytokeratin signaling pathway. AFAP1-AS1 promoted cancer cell metastasis via regulation of actin filament integrity. AFAP1-AS1 might be a potential novel marker that can predict cancer patient prognosis and as a potential therapeutic target for NPC.     

Triplex Polymerase Chain Reaction with Confronting Two-Pair Primers (PCR-CTPP) for NQO1 C609T,GSTM1 and GSTT1 Polymorphisms: the Most Convenient Genotyping Method

The polymerase chain reaction with confronting two-pair primers (PCR-CTPP) is a time-saving and inexpensive ‍genotyping method, which is applicable for most single nucleotide polymorphisms (SNPs). To date, we have established ‍PCR-CTPP conditions for tens of SNPs, including duplex genotyping. This paper introduces triplex PCR-CTPP to ‍simultaneously genotype three functional polymorphisms of carcinogen-detoxifying enzymes, NQO1 C609T, GSTM1 ‍null, and GSTT1 null, all of which are reported to have a significant association with smoking-related cancers. We ‍applied this method for 241 non-cancer patients to demonstrate the performance. Among the subjects, the genotype ‍frequency of NQO1 C609T was 35.7% for CC, 44.4% for CT and 19.9% for TT. The null type frequencies of GSTM1 ‍and GSTT1 were 53.4% and 44.0%, respectively. Their distributions were similar to those reported for Japanese by ‍other studies. This is the first paper reporting the success of triplex PCR-CTPP. The polymorphisms applied are ‍useful examples, which could be adopted not only for research purposes, but also for risk assessment of individuals ‍exposed to carcinogenic substances, such as smokers. This convenient genotyping approach has advantages for ‍application in cancer prevention, especially in the Asian Pacific region.     

Methylation Profiles of BRCA1, RASSF1A and GSTP1 in Vietnamese Women with Breast Cancer

Objective: This study investigated the DNA promoter methylation profiles of BRCA1, RASSF1A and GSTP1 genes,both individually and in an integrative manner in order to clarify their correlation with clinicopathological parameters ofbreast cancer from Vietnamese patients, and establish new potential integrative methylation biomarkers for breast cancerdetection. Material and methods: The methylation frequencies of BRCA1, RASSF1A and GSTP1 were analyzed bymethylation specific polymerase chain reaction (MSP) in 70 specimens of breast carcinomas and 79 pairs of tumor andmatched adjacent normal tissues from breast cancer patients. Results: All the three analyzed genes showed a concordanceconcerning their promoter methylation in tumor and adjacent normal tissue. The methylation of BRCA1, RASSF1Aand GSTP1 was found in 58.23 %, 74.68 % and 59.49 % of tumor tissues and 51.90 %, 63.29 % and 35.44 % ofcorresponding adjacent tissues, respectively. When each gene was assessed individually, only the methylation ofGSTP1 was significantly associated with tumor tissues (p=0.003). However, the methylation frequency of at least one ofthe three genes and the methylation frequency of all the three genes both showed significant association with tumor(p=0.008 and p=0.04, respectively). The methylation of BRCA1 was found to be significantly associated with tumorgrade (p=0.01). Conclusion: This study emphasized that the panel of the three genes BRCA1, RASSF1A and GSTP1can be further developed as potential biomarkers in diagnosis and classification of breast cancer in Vietnamese women.     

Multiplex PCR with Confronting Two-pair Primers for CYP1A1 Ile462Val,GSTM1, GSTT1, and NQO1 C609T

Polymerase chain reaction with confronting two-pair primers (PCR-CTPP) is an effective genotyping method ‍for single nucleotide polymorphisms (SNPs) in aspects of reducing time and costs for analysis. So far we have ‍established PCR-CTPP conditions for tens of SNPs, including a triplex genotyping (Kawase et al., 2003). In the ‍present study we report a quadruplex PCR-CTPP to genotype simultaneously four functional polymorphisms of ‍carcinogen-metabolizing enzymes, CYP1A1 Ile462Val, GSTM1 null, GSTT1 null and NQO1 C609T, which were ‍reported that they have significant associations with smoking-related cancers. We applied this method for 475 health ‍check-up examinees to demonstrate the performance. Among the subjects, the genotype frequency of CYP1A1 ‍Ile462Val was 56.8% for Ile/Ile, 38.1% for Ile/Val and 5.1% for Val/Val. The null type frequencies of GSTM1 and ‍GSTT1 were 52.8% and 49.9%, respectively. And the genotype frequency of NQO1 C609T was 41.9% for C/C, ‍41.3% for C/T and 16.8% for T/T. Their distributions were similar to those reported for Japanese by other studies. ‍To the best of our awareness, this is the first paper that reports the success in quadruplex PCR-CTPP. The applied ‍polymorphisms are useful ones, which would be adopted not only for research purposes, but also for risk assessment ‍of individuals exposed to carcinogenic substances. This convenient genotyping would be applied for cancer prevention ‍especially in Asian Pacific regions, where expensive genotyping methods are hardly available.     

RNAi下调ACP1对胃肉瘤细胞MG63转移能力的影响

Objective  

The aim of this study was to study the inhibition effect of small interfering RNAs (siRNA) on gene expression in MG-63 cells, and to study the inhibitory effect on metastasis of MG-63.     

Serum ICAM-1 in renal cell cancer patients: Possible significance for presence of metastatic disease

Background Intercellular adhesion molecule-1 (ICAM-1) facilitates cell-to-cell adhesion through lymphocyte function associated antigen-1 (LFA-1). ICAM-1 also exists as a soluble form (sICAM-1) and the level of sICAM-1 is known to increase in the presence of malignant tumors. Previously, we reported frequent ICAM-1 expression in renal cell cancer (RCC). sICAM-1 may suppress antitumor immune reactions by blocking LFA-1 on lymphocytes. Methods Serum sICAM-1 and IL-6, possible RCC autocrine growth factors, were examined in 35 RCC patients before and after surgery. In situ expression of sICAM-1 in RCC tissue and the degree of macrophage and lymphocyte infiltration were evaluated semiquantitatively using immunohistochemistry techniques. Results Nine pre- and 12 postoperative patients had elevated sICAM-1 levels. RCC patients with elevated sICAM-1 levels revealed a high ICAM-1 expression and/or high degree of lymphocyte/macrophage infiltration. Elevation or persistence of high sICAM-1 levels after nephrectomy correlated with the presence of metastatic disease (P=0.02); sICAM-1 was elevated in 5 of the 7 (71%) patients with metastasis compared with 7 of the 28 (25%) without evidence of metastatic disease. In some patients, however, the sICAM-1 level fluctuated without regard to the presence or absence of tumor after operation. Elevated sICAM-1 levels were also associated with high IL-6 levels. Conclusion Elevated sICAM-1 levels in RCC patients are not necessarily produced by RCC cells. However, in some cases, elevated sICAM-1 levels may be useful in detecting metastatic disease and aid in the development of treatment strategies and/or postnephrectomy follow-up therapies.