卵巢癌患者miR-497、miR-125a-5p的表达及与其临床特征和生存率的关系

目的:分析卵巢癌患者癌组织中微小RNA-497(miR-497)和微小RNA-125a-5p(miR-125a-5p)的表达情况及其临床意义.方法:选取2018-06—2019-12在本院手术治疗的96例卵巢癌患者作为研究对象,将手术切除的卵巢癌组织作为试验组,癌旁(>2cm)正常组织为对照组.采用实时荧光定量PCR(...     

lncRNA LOC285194在肾癌组织中的表达及其对786-O细胞增殖、迁移与侵袭的影响

目的探讨lncRNA LOC285194在肾癌组织中的表达及其对肾透明细胞癌786-O细胞的增殖、迁移与侵袭的影响。方法实时荧光定量聚合酶链反应(qRT-PCR)检测lncRNA LOC285194在28例肾透明细胞癌患者癌组织及相应的癌旁组织、ccRCC细胞株786-O及正常肾上皮细胞系KiMA中的表达。将载有lncRNALOC285194序列的质粒和阴性对照质粒转染ccRCC细胞株786-O,CCK-8实验检测转染后786-O细胞的增殖能力变化,划痕实验检测转染后786-O细胞的迁移能力变化,Transwell法检测转染后786-O细胞的侵袭能力变化,Western blot实验检测转染后786-O细胞周期蛋白D1(cyclinD1)与血管内皮生长因子(VEGF)的表达变化。结果lncRNA LOC285194在肾透明细胞癌组织中的表达明显低于癌旁组织(P0.01),在ccRCC细胞株786-O中的表达明显低于正常肾上皮细胞系KiMA中的表达(P0.01)。上调lncRNA LOC285194的表达后,786-O细胞的增殖、迁移与侵袭能力明显降低,cyclin D1与VEGF蛋白的表达明显降低(P0.01)。结论 lncRNA LOC285194在肾癌组织中低表达,lncRNA LOC285194过表达能够抑制786-O细胞的增殖、迁移与侵袭。     

羽扇豆醇联合miR-145-5p对前列腺癌细胞增殖与凋亡的影响

目的:探讨羽扇豆醇(lupeol)联合微小RNA-145-5p(miR-145-5p)对前列腺癌细胞株LNCaP增殖与凋亡的影响。方法:将hsa-miR-145-5p和lupeol作用于LNCaP细胞24、48和72 h后用MTT法检测细胞活力抑制率;PI单染流式细胞术检测细胞周期;annexin V/PI双染流式细胞术和TUNEL实验检测细胞凋亡;Transwell法检测细胞迁移和侵袭;划痕愈合实验检测细胞迁移能力;细胞集落形成实验计算集落形成抑制率。结果:细胞对照组、非特异性对照组和溶剂组未出现有效的LNCaP细胞活力抑制、迁移抑制和侵袭抑制,而hsa-miR-145-5p组和lupeol组细胞活力、迁移和侵袭受到显著抑制,并出现早期凋亡;联合用药(hsa-miR-145-5p+lupeol)组比单独用药组出现更有效的生长抑制作用。结论:hsa-miR-145-5p和lupeol均可抑制LNCaP细胞增殖、迁移和侵袭,并诱导体外早期凋亡;lupeol可增强hsa-miR-145-5p对LNCaP细胞的抑增殖和促凋亡作用。     

miR-214对人舌鳞状细胞癌增殖能力影响的体外实验研究

目的 研究microRNA-214(miR-214)对舌癌AW13516细胞增殖能力的影响及其相关机制.方法 建立MIR(miR-214 mimics)组、NC(阴性转染)组及无转染对照(MOCK)组细胞.采用RT-PCR法检测各组miR-214水平;Western印迹法检测HM1、PCNA、cyclin D1的表达,采用MTT实验检测细胞增殖能力;采用软琼脂集落形成实验和平板克隆形成实验检测细胞形成克隆的能力;采用流式细胞术观察各组细胞凋亡比例变化.结果 与阴性转染组和无转染对照组相比,miR-214 mimics干预AW13516细胞后,MIR组miR-214表达水平明显升高(P＜0.05),PIMl、PCNA、cyclin D1蛋白表达水平降低,细胞增殖能力明显降低,克隆形成能力明显减弱,凋亡比例明显升高(P＜0.05).结论 miR-214可能通过降低PIM1水平下调PCNA、cyclin D1蛋白表达,抑制舌癌AW13516细胞的增殖能力并促进其凋亡.     

骨肉瘤细胞凋亡和增殖与预后的关系

目的：探讨细胞凋亡指数与骨肉瘤病理、细胞增殖及预后的关系。方法：应用ＴＵＮＥＬ方法检测８０例骨肉瘤凋亡细胞,ＰＣＮＡ单克隆抗体ＰＣ１０免疫组化检测肿瘤组织增生,以１００个肿瘤细胞中凋亡细胞和增生细胞分别作为凋亡指数ＡＩ（％）和增生指数ＰＩ（％）。结果：８０例骨肉瘤中ＡＩ范围为０．６３％～１８．８％,其与骨肉瘤ＷＨＯ新分型及ＰＩ值密切相关（Ｐ〈０．０５）。而且ＡＩ〉７．２１的骨肉瘤比ＡＩ≥７．２１的     

微小RNA-497抑制甲状腺乳头状癌细胞活力、侵袭和迁移

目的:研究微小RNA-497(miR-497)抑制甲状腺乳头状癌(PTC)细胞活力、侵袭和迁移的作用机制。方法:采用Target Scan 6. 0软件预测miR-497的靶基因,通过萤光素酶报告基因检测法、RT-qPCR和Western blot进行靶基因验证,再通过RT-qPCR检测PTC组织中miR-497及其靶基因的表达,并通过基因转染研究miR-497及其靶基因对PTC细胞活力、侵袭和迁移的影响。结果:Target Scan 6. 0软件预测、萤光素酶报告基因检测法、RTq PCR和Western blot均证明AKT3是miR-497的直接靶基因。此外,PTC组织中的AKT3表达水平较正常组织高(P 0. 05),且与miR-497表达呈负相关(r=-0. 573 7,P 0. 01)。下调AKT3可以抑制PTC细胞的活力、迁移和侵袭,与miR-497过表达在PTC细胞中具有相似的作用。结论:miR-497通过直接靶向调节AKT3抑制甲状腺乳头状癌细胞的活力、侵袭和迁移。     

细胞因子对肾癌细胞株786-0、GRC-1 Fas、FasL表达的调节及其意义

目的 :研究细胞因子对肾癌株Fas、FasL表达的影响及其意义。方法 :单独或联合应用IFNγ ,IFNα ,IL 2 ,TNFα刺激肾癌株 786 0、GRC 1细胞并检测Fas、FasL表达 ,以Fas单克隆抗体 (FasAb)诱导其凋亡 ,以JurkatT细胞共培养试验检测其FasL功能。结果 :1 IFNγ、IFNα均能显著上调 786 0、GRC 1细胞的Fas表达 (P <0 0 1,P <0 0 1) ,并促进FasAb诱导的凋亡 (P <0 0 1,P <0 0 1)。 2 TNFα、IFNα能分别上调 786 0、GRC 1细胞的FasL表达。IFNγ能显著上调 786 0、GRC 1细胞的FasL表达(P<0 0 1,P <0 0 1) ,并促进JurkatT细胞凋亡 (P <0 0 1,P <0 0 1)。结论 :IFNγ、IFNα可增强肾癌细胞株的Fas表达 ,并促进FasAb介导的凋亡。但其亦能上调肾癌细胞FasL表达并增强其对淋巴细胞的攻击作用。     

miR-497-5p靶向调控Wnt3a/β-catenin信号通路抑制子宫内膜癌进展的体外细胞实验

目的 探讨微小RNA(miR)-497-5p对子宫内膜癌Ishikawa细胞增殖、侵袭和凋亡的影响及其机制.方法 将体外培养的Ishikawa细胞分为Ctrl组(未处理)、miR-NC组(转染模拟物阴性对照)和miR-497-5p组(转染miR-497-5p模拟物),采用实时荧光定量PCR检测Ishikawa细胞中mi...     

细胞因子对肾癌细胞株786-0Fas表达及其凋亡的调控

为研究细胞因子对肾癌细胞株 786 0Fas表达以及FasAb介导凋亡的影响 ,单独或联合应用IFN γ ,IFN α ,IL 2 ,TNF α刺激 786 0细胞株 ,并以Fas单克隆抗体 (FasAb )诱导其凋亡。结果发现 ,IFN α、IFN γ均能显著上调 786 0细胞的Fas表达 (P <0 0 1,P <0 0 1)并促进FasAb诱导的凋亡 (P <0 0 1,P <0 0 1) ;IL 2、TNF α对 786 0的Fas表达及FasAb诱导的凋亡均无影响 ;IL 2不能增强IFN α、IFN γ诱导的Fas表达 ,亦不能促进凋亡。TNF α能增强IFN α诱导的Fas表达并促进凋亡 ,但不影响IFN γ诱导的Fas表达及其凋亡。结果表明IFN γ、IFN α可增强肾癌细胞株 786 0的Fas表达 ,并促进FasAb介导的凋亡。但其对FasAb介导凋亡的敏感性并不完全取决于Fas表达水平     

肝细胞黏附分子诱导肾癌786-0细胞系凋亡

目的 探讨肝细胞黏附分子(HEPACAM)基因转染肾癌细胞对其凋亡的影响.方法 将携带HEPACAM基因的重组质粒转染786-0细胞,RT-PCR鉴定HEPACAM基因在786-0中的表达;Hoechst染色结合荧光显微镜观察细胞形态改变;FCM检测细胞周期及细胞凋亡情况;Western印迹法检测BAX、BCL-2、C...     

Down-regulation of miR-497 is associated with poor prognosis in renal cancer

Introduction: Clear cell renal cell carcinoma (ccRCC) is the most common type of cancer in the adult kidney, and the prognosis of metastatic ccRCC remains poor with high mortality. Recent study indicated that microRNAs (miRNAs) played critical roles in tumor progression. The aim of this study was to investigate the expression, biological role and clinical significance of miR-497 in ccRCC. Methods: Quantitative real-time PCR (qRT-PCR) was performed to detect the expression of miR-497 in renal cancer cell lines and ccRCC tissues. The association between miR-497 expression and overall survival was estimated by the Kaplan-Meier method. Gain of function assays were performed in the 786-O renal cancer cell line. Results: Expression of the miR-497 was significantly decreased in renal cancer cell lines and ccRCC tissues when compared with normal human proximal tubule epithelial cells and adjacent non-tumor tissues. Decreased miR-497 expression was significantly associated with tumor stage, histological grade and lymph node metastases. Significantly shorter overall survival was observed in patients with lower expression of the miR-497. Overexpression of miR-497 significantly inhibited renal cancer cell proliferation, migration and invasion. Conclusions: Our results demonstrated that miR-497 was decreased in ccRCC tissues and may provide a potential prognostic biomarker and a potential target for therapeutic intervention.     

Reappraisal of T3N0/NxM0 renal cell carcinoma: significance of extent of fat invasion, renal vein invasion, and adrenal invasion

T3 renal cell carcinoma (RCC) is a heterogeneous group of tumors that are substaged based on perirenal or sinus fat invasion, adrenal invasion, and renal vein invasion. To evaluate whether the extent of fat invasion (minimal versus extensive) and direct adrenal gland invasion, renal vein invasion with or without concurrent fat invasion has a similar prognosis, we retrospectively reviewed 198 T3N0/NxM0 RCCs in a single academic tertiary hospital. Fat invasion was subdivided as minimal (< or =5 mm into the fat) or extensive (>5 mm) invasion. Direct adrenal invasion was defined as contiguous involvement of ipsilateral adrenal gland. Among the 198 T3 RCCs, minimal and extensive fat invasions were identified in 57 and 61 cases, respectively; renal vein invasion and direct adrenal invasion were seen in 66 and 14 cases. The patients' average age was 62.9 years, and 145 patients were male and 53 were females. The 2-year and 5-year survival rates were 85% and 56% for minimal fat invasion, 76% and 70% for extensive fat invasion, and 55% and 32% for renal vein invasion, respectively. There was no difference of survival in patients with T3b (renal vein invasion) RCC stratified by presence or absence of concurrent fat invasion. The 2-year and 5-year survival rates for adrenal invasion were 31% and 21%, respectively, which was significantly worse than that of fat or renal vein invasion. Multivariate analysis showed that nuclear grade, sarcomatoid differentiation, and subgrouping of pT3 RCC (fat invasion, renal vein invasion, and adrenal invasion) remained independent predictors of patient's overall survival. In conclusion, our study shows that T3 RCCs with minimal or extensive perinephric fat invasion has a similar prognosis and is significantly more favorable than that of renal vein invasion regardless of presence or absence of concurrent fat invasion. In contrast, tumors with adrenal gland invasion carry a far worse prognosis than perinephric fat or renal vein invasion and thus supporting a separate stage category.     

抑制miR-218的表达对人去势抵抗型前列腺癌C4-2细胞增殖、侵袭及迁移能力的影响及其机制

目的 探讨抑制miR-218的表达对人去势抵抗型前列腺癌C4-2细胞增殖、侵袭及迁移的影响及其机制。方法 培养人去势抵抗型前列腺癌C4-2细胞,分为空白组、阴性对照组(NC组)、miR-218组;空白组未予以任何处理,NC组转染阴性对照序列,miR-218组转染miR-218抑制剂。各组细胞处理后继续培养5 d,然后收集细胞,采用实时荧光定量PCR(qPCR)检测转染后各组细胞miR-218的表达情况,采用WST-1细胞增殖实验和细胞平板克隆形成实验检测转染后各组C4-2细胞增殖、活性情况,采用划痕实验检测各组C4-2细胞迁移距离,采用Transwell小室检测细胞侵袭数量和迁移数量,采用半定量逆转录PCR(RT-PCR)检测TOB1基因mRNA表达情况,采用Western blot检测TOB1基因蛋白表达情况。结果 qPCR结果显示:转染后NC组、miR-218组人去势抵抗型前列腺癌C4-2细胞miR-218的相对表达量分别为1.02±0.06、0.38±0.04,miR-218组中miR-218的表达明显低于NC组,差异有统计学意义(t=15.372, P＜0.05)。WST-1细胞增殖实验结果显示:(1)转染后空白组、NC组随着时间的延长,光密度(OD)值呈上升趋势,而miR-218组OD值在24、48 h时呈上升趋势,72 h时OD 值开始明显下降;(2)空白组、NC组、miR-218组组间比较,OD 值在0、24 h时3组间差异均无统计学意义(P值均＞0.05),48、72 h时miR-218组OD 值均小于空白组、NC组,差异均有统计学意义(F=12.615、24.523,P值均＜0.05)。细胞平板克隆形成实验结果显示:转染后空白组、NC组和miR-218组克隆形成数分别为(42.2±1.2)个、(41.3±2.4)个、(20.6±1.2)个,miR-218组明显少于空白组、NC组,差异均有统计学意义(F=155.530,P＜0.05)。划痕实验和Transwell小室细胞侵袭、迁移实验结果显示:转染后,miR-218组细胞迁移距离、侵袭细胞数和迁移细胞数均低于空白组和NC组,差异均有统计学意义(F=17.625、48.625、38.352,P值均＜0.05);而空白组和NC组间细胞迁移距离、侵袭细胞数和迁移细胞数比较,差异均无明显统计学意义(P值均＞0.05)。RT-PCR和Western blot检测结果显示:转染后空白组、NC组、miR-218组TOB1基因mRNA的相对表达量分别为 0.20±0.02、0.19±0.03、0.35±0.02,TOB1基因蛋白的相对表达量分别为0.22±0.01、0.23±0.02、0.68±0.02,miR-218组细胞中TOB1 mRNA和蛋白水平均明显高于空白组和NC组,差异均有统计学意义(F=18.615、22.523,P值<0.05);而空白组细胞中TOB1 mRNA和蛋白水平与NC组比较,差异均无统计学意义(P值>0.05)。结论 抑制人去势抵抗型前列腺癌C4-2细胞miR-218的表达,可抑制该细胞的增殖和活性,并抑制其侵袭和迁移能力,其机制可能与上调TOB1基因mRNA和蛋白表达有关。     

miRNA-25对人食管鳞状细胞癌细胞株TE1增殖的影响

目的:探讨过表达/沉默微小RNA-25(microRNA-25,miRNA-25)对人食管鳞状细胞癌细胞株TE1增殖能力的影响及其作用机制。方法:RT-PCR检测各临床样品组织中miRNA-25的表达水平。建立miRNA-25过表达/沉默的TE1细胞株,采用CCK-8法、Brd U实验和流式细胞术检测TE1细胞增殖能力的变化及细胞周期状态;Western blot法和RT-PCR法检测细胞周期调控因子细胞周期蛋白E1(cyclin E1)和细胞周期蛋白依赖性激酶2(CDK2)的蛋白与mRNA表达水平。结果:miRNA-25在食管黏膜组织中具有特异性表达并在TE1细胞中呈高表达。CCK-8法和Brd U实验结果显示过表达miRNA-25的TE1细胞的增殖能力显著增加(P0.05),而沉默miRNA-25抑制TE1细胞的增殖;流式细胞术检测结果显示过表达miRNA-25可明显促进TE1细胞从G0/G1期向S期转换,沉默miRNA-25则抑制其转换。同时Western blot和RT-PCR实验结果显示过表达miRNA-25后,cyclin E1和CDK2的蛋白和mRNA表达水平均显著增加(P0.05),沉默miRNA-25后则显著减少(P0.05)。结论:miRNA-25能够促进人食管鳞状细胞癌细胞株TE1的增殖,其作用机制可能与促进细胞周期转换及上调cyclin E1和CDK2的表达水平有关,提示miRNA-25可作为治疗食管鳞状细胞癌的一个潜在靶点。     

siRNA targeting Survivin inhibits growth and induces apoptosis in human renal clear cell carcinoma 786-O cells

We investigated the inhibitory effect of small interfering RNA (siRNA) targeting Survivin gene on cell proliferation and apoptosis in human renal clear cell carcinoma 786-O cells. qRT-PCR, immunocytochemistry, and Western Blot were used to detect Survivin gene expression in 786-O cells. Cell proliferation was determined by BrdU assay and PCNA expression. Cell apoptosis was analyzed through detection of caspase-3 activity, and the effect of Survivin-siRNA on Bcl-2 gene expression was also examined. Forty-eight hours after transfection, Survivin expression was markedly inhibited at the mRNA and protein level. Downregulation of Survivin resulted in a significant inhibition of tumor cell growth. Caspase-3 activity showed that siRNA targeting Survivin gene induced cell apoptosis in 786-O cells. Moreover, Bcl-2 protein expression was markedly inhibited by transfection with siRNA against Survivin. These results indicate that siRNA targeting Survivin gene can downregulate Survivin gene expression in 786-O cells, inhibit growth, and induce apoptosis of renal carcinoma cells.     

MYH9在人肝癌组织中的表达及其对肝细胞系增殖和凋亡的影响

目的探讨非肌肉肌球蛋白重链(MYH9)在肝癌组织中的表达及通过沉默MYH9基因对肝癌细胞系SMMC-7721的增殖及凋亡的影响。方法收集50组人肝癌组织及癌旁组织,选用人肝癌细胞系SMMC-7721和Hep G2及人正常肝细胞系LO2,免疫组织化学方法及Western blot检测肝癌组织及癌旁组织中MYH9蛋白的表达,Western blot检测SMMC-7721、Hep G2及LO2中MYH9蛋白的表达;将MYH9 siRNA转染SMMC-7721,CKK8法及流式细胞术检测沉默MYH9对肝癌细胞增殖及细胞凋亡的影响。结果 MYH9蛋白在肝癌组织中的表达明显高于癌旁(P0.05);MYH9蛋白在SMMC-7721及Hep G2中的表达均明显高于LO2(P0.05);沉默MYH9基因可抑制细胞增殖(P0.001),促进细胞凋亡(P0.05)。结论 MYH9蛋白在肝癌组织的表达显著高于癌旁组织;MYH9低表达能有效抑制肝癌细胞的增殖,促进其凋亡。