miR-17-5p 通过下调BRMS1L表达调控鼻咽癌CNE2 细胞增殖、侵袭、迁移和凋亡

目的：探讨miR-17-5p 通过调控乳腺癌转移抑制基因1 相似基因（breast cancer metastasis suppressor 1 like,BRMS1-like 或BRMS1L）表达调控鼻咽癌细胞增殖和侵袭的分子机制。方法：收集2014 年1 月至2017 年12 月间平煤神马医疗集团总医院收治的40 例鼻咽癌患者切除的鼻咽癌组织及其相应的癌旁组织标本,以及鼻咽癌细胞系CNE 2、HONE 1、C666-1 和鼻咽部永生化上皮细胞株NP69,采用qPCR 检测miR-17-5p 在癌组织和癌细胞系中的表达水平。通过StarBase 数据库预测BRMS1L 与miR-17-5p 的靶向关系,采用双荧光素酶报告基因实验进行验证。WB检测转染miR-17-5p 模拟物和抑制物对CNE2 细胞中BRMS1L表达的影响;CCK-8、Transwell 和流式细胞术检测miR-17-5p/BRMS1L分子轴对CNE2 细胞增殖、侵袭、迁移和凋亡的影响。结果：miR-17-5p 在鼻咽癌组织和鼻咽癌细胞系中呈高表达（P<0.05 或P<0.01）,下调miR-17-5p 显著抑制CNE2 细胞增殖、侵袭、迁移但促进细胞凋亡（P<0.05 或P<0.01）。miR-17-5p 靶向作用于BRMS1L并下调其表达水平。过表达BRMS1L可显著抑制CNE2 细胞增殖、侵袭、迁移而促进细胞凋亡（均P<0.01）;而同时过表达miR-17-5p 和BRMS1L 可逆转上述作用（均P<0.01）。结论：miR-17-5p通过靶向下调BRMS1L的表达,进而促进CNE2 细胞增殖、侵袭和迁移而抑制细胞凋亡。     

LncRNA PRNCR1靶向miR-653-5p调控鼻咽癌细胞恶性生物学行为

目的探讨前列腺癌非编码RNA 1(prostate cancer non-coding RNA 1,PRNCRl)对鼻咽癌细胞恶性生物学行为的影响及其可能的机制。方法采用RT-qPCR法检测鼻咽癌细胞系(5-8F、6-10B、C666-1)及鼻咽上皮细胞NP69中PRNCR1和miR-653-5p表达。分别将si-PRNCR1、miR-653-5p mimics或两者共转染至鼻咽癌6-10B细胞,采用CCK-8法检测细胞的增殖能力,流式细胞术检测细胞的凋亡情况,划痕实验检测细胞的迁移能力,Transwell小室实验检测细胞的侵袭能力,双荧光素酶报告基因实验验证PRNCR1和miR-653-5p的靶向关系。结果鼻咽癌细胞系(5-8F、6-10B、C666-1)中PRNCR1的表达水平均高于鼻咽上皮细胞NP69(均P<0.001),而miR-653-5p表达水平均低于NP69细胞(均P<0.001)。敲减PRNCR1或过表达miR-653-5p后,鼻咽癌6-10B细胞的增殖能力、划痕愈合率及侵袭细胞数均降低(均P<0.001),而凋亡率升高(均P<0.001)。双荧光素酶报告基因实验证实PRNCR1与miR-653-5p存在靶向关系。敲减PRNCR1后,6-10B细胞中miR-653-5p的表达水平升高(P<0.001)。敲减miR-653-5p可逆转敲减PRNCR1对鼻咽癌6-10B细胞增殖、凋亡、迁移和侵袭的影响。结论PRNCR1在鼻咽癌细胞系中高表达,敲减PRNCR1表达可抑制鼻咽癌细胞增殖、迁移和侵袭,促进细胞凋亡,其作用机制可能与靶向负调控miR-653-5p有关。     

靶向干扰Glypican-3基因表达对鼻咽癌细胞增殖及侵袭迁移的影响

目的:探讨Glypican-3(GPC3)基因在鼻咽癌细胞系CNE中的表达情况,并研究靶向抑制GPC3基因表达对鼻咽癌细胞增殖及侵袭迁移的影响.方法:应用Western blotting和QRT-PCR检测人正常永生化鼻咽上皮细胞株NP69、鼻咽癌细胞株CNE中GPC3的表达,采用siRNA干扰技术沉默CNE细胞中GPC3基因的表达,分别采用Western blotting和QRT-PCR检测siRNA的靶向沉默效果.MTT增殖实验与Transwell实验观察GPC3抑制对CNE细胞增殖及侵袭迁移的影响.结果:GPC3在CNE细胞中高表达,用siRNA干扰技术沉默鼻咽癌细胞CNE的GPC3后可以抑制癌细胞的增殖、侵袭和迁移(P＜0.05).结论:下调GPC3的表达可以抑制鼻咽癌细胞的增值、侵袭及迁移.     

miR-383-3p对鼻咽癌6-10B细胞生物学功能的影响及其可能作用机制

目的:探讨miR-383-3p对鼻咽癌6-10B细胞功能的影响及其可能作用的靶基因。方法:采用脂质体介导法将miR-383-3p模拟物（miR-383-3p mimic）、miR-383-3p抑制物（miR-383-3p inhibitor）以及对照模拟物（NC）转染6-10B细胞,MTT 法检测各组6-10B细胞的增殖能力,Annexin V-FITC/PI双染法检测各组6-10B细胞的凋亡情况,Transwell实验检测各组6-10B细胞的迁移能力,双荧光素酶报告基因实验确定miR-383-3p与高迁移率族蛋白A2(high mobility group A2,HMGA2)的靶向作用情况,qRT-PCR检测不同鼻咽癌细胞中miR-383-3p及各组6-10B细胞中miR-383-3p和HMGA2 mRNA表达水平,Western blot检测各组6-10B细胞中水通道蛋白5（aquaporins 5,AQP5)、环磷腺苷效应元件结合蛋白（cAMP-response element binding protein,CREB)、p-CREB以及HMGA2蛋白表达水平,免疫荧光染色检测各组6-10B细胞中AQP5和核因子-κB（nuclear factor-kappa B,NF-κB)的荧光强度。结果:与NP69细胞相比,miR-383-3p在鼻咽癌细胞CNE1、CNE2、HONE1、HNE-1、C666-1、6-10B中的表达量均明显下降（P＜0.05或P＜0.001）;与NC组相比,miR-383-3p mimic 组能够显著抑制鼻咽癌6-10B细胞的增殖和迁移并诱导细胞凋亡（P＜0.05）,而miR-383-3p inhibitor组6-10B细胞增殖和迁移能力明显升高,细胞凋亡水平则明显下降（P＜0.05）;HMGA2是miR-383-3p的靶基因,与NC组相比,miR-383-3p mimic 组HMGA2 mRNA 和蛋白的表达水平下降（P＜0.05）,而miR-383-3p inhibitor组明显升高（P＜0.05）;与NC组相比,miR-383-3p mimic 组AQP5和p-CREB蛋白表达量明显升高（P＜0.05）,而miR-383-3p inhibitor组明显下降（P＜0.05）;与NC组相比,miR-383-3p mimic组AQP5荧光信号较强,而 NF-κB荧光信号较弱,miR-383-3p inhibitor组检测结果与此相反。结论:miR-383-3p可能通过负调控HMGA2的表达来抑制鼻咽癌细胞的增殖与迁移,进而促进鼻咽癌细胞凋亡,该作用可能与AQP5/CREB途径的信号通路有关。     

LINC00460靶向miR-380-3p对皮肤鳞状细胞癌细胞增殖、迁移、侵袭和凋亡的影响

目的:探讨LINC00460对皮肤鳞状细胞癌（CSCC）细胞增殖、迁移、侵袭和凋亡的影响及可能机制。方法:实时荧光定量PCR（RT-qPCR）分析人类永生化表皮细胞（HaCaT）和CSCC细胞（SCC13、A431和HSC-5）中LINC00460和miR-380-3p的表达水平。将LINC00460小干扰RNA（si-LINC00460）、miR-380-3p模拟物（miR-380-3p mimics）、si-LINC00460+miR-380-3p抑制物（anti-miR-380-3p）分别转染A431细胞,细胞计数试剂盒（CCK-8）检测细胞活力,流式细胞术分析细胞凋亡,Transwell实验分析细胞迁移和侵袭能力,蛋白质印记（Western blot）检测细胞周期素D1（CyclinD1）、基质金属蛋白酶2（MMP2）、基质金属蛋白酶9（MMP9）、上皮细胞钙黏蛋白（E-Cadherin）、神经钙黏蛋白（N-Cadherin）、波形蛋白（Vimentin）的表达。双荧光素酶报告基因实验、RT-qPCR确定LINC00460对miR-380-3p的靶向调控作用。结果:与HaCaT比较,CSCC细胞中LINC00460表达显著增加,miR-380-3p表达显著降低（P＜0.05）。下调LINC00460表达后A431细胞增殖活力、迁移和侵袭细胞数以及CyclinD1、MMP2、MMP9、N-Cadherin和Vimentin蛋白表达显著降低（P＜0.05）,凋亡率、E-Cadherin蛋白表达显著升高（P＜0.05）。上调miR-380-3p表达后A431细胞增殖活力、迁移和侵袭细胞数以及CyclinD1、MMP2和MMP9表达显著降低（P＜0.05）,凋亡率显著升高（P＜0.05）。与下调LINC00460比较,同时下调LINC00460和miR-380-3p后A431细胞增殖活力、迁移和侵袭细胞数以及CyclinD1、MMP2、MMP9、N-Cadherin和Vimentin蛋白表达显著升高（P＜0.05）,凋亡率、E-Cadherin蛋白表达显著降低（P＜0.05）。LINC00460靶向负调控miR-380-3p表达。结论:CSCC细胞中LINC00460表达增加,下调LINC00460能够降低CSCC细胞的增殖、迁移和侵袭能力,诱导细胞凋亡,其机制与靶向调控miR-380-3p表达有关。     

miR-218-5p靶向下调LPAR3抑制宫颈癌细胞增殖、迁移和侵袭

目的:探讨miR-218-5p通过调控LPAR3表达对宫颈癌细胞增殖、迁移和侵袭的影响。方法:qRT-PCR和Western blot检测人正常宫颈细胞H8和4种宫颈癌细胞（SiHa、HeLa、MS751和HT-3）中miR-218-5p和LPAR3的表达。以HeLa细胞为后续研究对象,分别构建过表达miR-218-5p和敲减LPAR3的HeLa细胞株,CCK-8法检测细胞存活情况,Transwell实验检测细胞的迁移和侵袭能力,Western blot检测细胞增殖相关蛋白CyclinD1、迁移侵袭相关蛋白MMP2和MMP9的表达。双荧光素酶报告基因实验和Western blot验证miR-218-5p和LPAR3的靶向调控关系。结果:与人正常宫颈细胞H8相比,4种宫颈癌细胞miR-218-5p的表达显著下调,LPAR3的表达显著上调。过表达miR-218-5p或敲减LPAR3均可抑制HeLa细胞的增殖、迁移和侵袭能力,抑制CyclinD1、MMP2和MMP9蛋白的表达。LPAR3是miR-218-5p的靶基因,miR-218-5p可负性调控LPAR3的表达。过表达LPAR3可逆转miR-218-5p对HeLa细胞增殖、迁移和侵袭的影响。结论:miR-218-5p通过靶向下调LPAR3表达抑制宫颈癌细胞的增殖、迁移和侵袭,miR-218-5p/LPAR3分子轴有望成为宫颈癌的潜在治疗靶点。     

miR-124-3p.1靶向PRDM2调节JAK/STAT通路对胰腺癌细胞增殖和凋亡的影响

摘 要：［目的］ 研究miR-124-3p.1对胰腺癌细胞增殖、凋亡的影响,并探讨其作用机制。［方法］ 运用qRT-PCR法检测组织和细胞中miR-124-3p.1、PR结构域蛋白2(PRDM2)的表达;将miR-124-3p.1 mimics、miR-NC、anti-miR-124-3p.1 mimics、anti-miR-NC用脂质体法转染PANC-1细胞;Western blot检测细胞中PRDM2、p-JAK2、p-STAT3蛋白表达;MTT法检测细胞增殖。［结果］ 与人正常胰腺组织细胞相比,胰腺癌组织细胞中PRDM2表达显著性升高,miR-124-3p.1表达显著性降低（P<0.05）;PRDM2为miR-124-3p.1的靶标。过表达miR-124-3p.1可抑制胰腺癌细胞增殖、促进凋亡、抑制JAK/STAT通路。［结论］ miR-124-3p.1可抑制胰腺癌细胞增殖和促进凋亡,可能与靶向PRDM2和抑制JAK/STAT通路有关。     

CircMATR3调节miR-129-5p/SOX2轴对鼻咽癌细胞CNE1恶性生物学行为的影响

目的:探讨CircMATR3调节miR-129-5p/SOX2轴对鼻咽癌细胞恶性生物学行为的影响。方法:以鼻咽癌细胞系CNE1为研究对象,将CNE1细胞分NC组、si-NC组、si-CircMATR3组、miR-NC组、miR-129-5p mimic组、si-CircMATR3+inhibitor NC组、si-CircMATR3+miR-129-5p inhibitor组、si-SOX2组。RT-qPCR检测细胞中CircMATR3、miR-129-5p、SOX2 mRNA的表达;Western blot检测蛋白表达;双荧光素酶报告实验验证CircMATR3与miR-129-5p、miR-129-5p与SOX2之间的靶向关系;克隆形成实验检测细胞克隆形成能力;Hoechst33342实验观察细胞形态学变化;Transwell小室实验检测细胞侵袭能力;流式细胞术检测细胞周期与细胞凋亡。结果:CircMATR3与miR-129-5p、miR-129-5p与SOX2之间存在靶向关系;沉默CircMATR3或过表达miR-129-5p或沉默SOX2可以抑制鼻咽癌细胞CNE1的克隆形成、侵袭...     

miR-409-3p靶向调控RRM2抑制鼻咽癌细胞增殖、迁移及侵袭

目的:探究微小RNA-409-3p(miR-409-3p)对鼻咽癌细胞增殖、迁移及侵袭的影响及其作用机制.方法:采用实时荧光定量聚合酶链反应(qRT-PCR)与蛋白免疫印迹法(Western blot)分别检测人永生化鼻咽上皮细胞(NP69)、鼻咽癌细胞5-8F、6-10B中miR-409-3p、核糖核苷酸还原酶M2(...     

miR-3200-3p通过靶向抑制RNF111促进结直肠癌细胞恶性进展的机制研究

目的:探讨miR-3200-3p能否通过靶向抑制RNF111促进结直肠癌细胞恶性进展。方法:选择5株人结直肠癌细胞系,Real-time PCR检测miR-3200-3p、RNF111的表达,Western blot检测RNF111蛋白的表达;利用双荧光素酶实验验证miR-3200-3p与RNF111的靶向抑制;利用miR-3200-3p mimic/inhibitor或利用miR-3200-3p inhibitor与RNF111 siRNA共转染HCT116细胞,Real-time PCR检测miR-3200-3p表达,Western blot检测RNF111、p-SMAD2蛋白表达,MTT检测细胞增殖,划痕实验检测细胞迁移,Transwell检测细胞侵袭,流式细胞术检测细胞凋亡情况。结果:五株人结直肠癌细胞中,HCT116细胞中miR-3200-3p相对高表达,RNF111相对低表达;miR-3200-3p mimic或inhibitor转染后,与各自NC组相比,可显著促进或抑制RNF111蛋白的表达,促进或抑制细胞的增殖、侵袭及迁移,抑制或促进细胞凋亡（均P＜0.05）;与pmirGLO-MUT 3' UTR+mimics转染组相比,pmirGLO-WT 3' UTR+mimics转染组荧光素酶活性显著降低（P＜0.05）;与miR-3200-3p NC组相比,miR-3200-3p inhibitor及miR-3200-3p inhibitor+siRNA NC组RNF111蛋白表达显著升高,p-SMAD2蛋白表达显著降低,细胞增殖、迁移及侵袭被显著抑制,细胞凋亡被显著促进（均P＜0.05）,与miR-3200-3p inhibitor+siRNA NC组相比,miR-3200-3p inhibitor+RNF111 siRNA组细胞RNF111、p-SMAD2蛋白表达、增殖、迁移、侵袭及凋亡被显著逆转（均P＜0.05）。结论:miR-3200-3p可通过靶向抑制RNF111促进结直肠癌细胞增殖、侵袭及迁移,抑制细胞凋亡。     

Polyamine metabolism and interconversion in NIH 3T3 and ras-transfected NIH 3T3 cells

The effect of transfection of NIH 3T3 cells by the human ras (c-Ha-ras-1) oncogene on uptake, interconversion, and excretion of polyamines was studied. Uptake and interconversion of spermidine were higher in the ras-transfected cells. Acetylpolyamines were excreted into the medium by the ras-transfected cells, whereas they were retained by NIH 3T3 cells. In addition to acetylpolyamines, some unknown polyamine conjugates occurred in the ras-transfected cells.     

Prostaglandin production in cultures of BALB/3T3 and SV3T3 mouse fibroblasts.

The concentration of different prostaglandins (PG's) was determined in both cells and culture medium of growing BALB/3T3 and BALB/3T3 (3T3) cultures transformed by simian virus 40 (SV3T3). Most PG's were found in the culture medium rather than in the cells. Further, the larger PG measurements were PGE and a composite measurement of PGA and PGB. PGF was detected at lower levels. The sum of PGE and the composite measurement (PGA+PGB) was the best indication of PG production in culture. When 2-day medium collections from 3T3 and SV3T3 cells were measured by radioimmunoassay for PGs, higher concentrations of PG were detected in the media of SV3T3 cultures. This difference in PG production was not due merely to differences in cell density, since SV3T3 cells produced higher PG concentrations, even at equal cell densities. PG production for a 2-day interval was more a function of cell type than cell density.     

三维医学影像诊断工作站-3dmed

本文介绍了一个我们自主开发的三维医学影像诊断工作站.系统运行于Windows NT/2000/98环境,主要包括数据接口、图像预处理、切片重组、三维重建、三维显示、虚拟内窥镜等功能.可广泛用于CT、MRI等医学图像的处理与分析,辅助医生进行临床诊断,具有很好的应用前景.     

PIK3R3 promotes chemotherapeutic sensitivity of colorectal cancer through PIK3R3/NF-kB/TP pathway

Phosphoinositide-3-kinase regulatory subunit 3(PIK3R3) is overexpressed in different types of human cancer. We previously reported the important role of PIK3R3 in colorectal cancer (CRC). However, the prognosis effect of PIK3R3 in CRC is still remaining unclear. In this study, we explored online clinical databases to analyze the prognosis differences between higher and lower expression of PIK3R3 in CRC patients. Interestingly, we found that better disease-free survival (DFS) were occurred in patients with higher expression of PIK3R3, but there is no significant difference in overall survival (OS). For further, we showed that PIK3R3 could enhance 5-FU induced apoptosis by regulating the expression of thymmidine phosphorylase (TP). In conclusion, PIK3R3 could be considered as a predictor of 5-FU sensitivity for personalized treatment, and a therapeutic target for colorectal cancer.     

Decreased expression of both FcγRII and FcγRIII mRNA in leukemic granulocytes

Morphologically mature granulocytes from patients with chronic myeloid leukemia exhibit a defect in internalization of heat-aggregated IgG. In this study, we investigate the status of the steady-state levels of the mRNA for the two receptors for IgG, FcγRII and FcγRIII, as a step towards understanding the molecular basis of the defect and in turn the discordant maturation of the leukemic cells. Our data show that the mRNA for both receptors is lower in the leukemic cells relative to the normal cells. This may be one of the causes for the defective endocytosis.