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1.

Background  The multidrug resistance (MDR) associated with the expression of the mdr1 gene and its product P-glycoprotein is a major factor in the prognosis of hepatocellular carcinoma cell (HCC) patients treated with chemotherapy.  Our study was to establish a stable HCC MDR cell line where a de novo acquisition of multidrug resistance specifically related to overexpression of a transgenic mdr1.
Methods  The 4.5-kb mdr1 cDNA obtained from the plasmid pHaMDR1-1 was cloned into the PCI-neo mammalian expression vector, later was transferred by liposome to human hepatocarcinoma cell line HepG2. Then the transfected HepG2 cells resisting G418 were clustered and cultured and the specific fragment of mdr1 cDNA, mRNA and the P-glycoprotein (Pgp) in these HepG2 cells were detected by PCR, RT-PCR and flow cytometry, respectively.  The accumulation of the daunorubicin was determinated by flow cytometry simultaneously. The nude mice model of grafting tumour was established by injecting subcutaneously HepG2/mdr1 cells in the right axilla. When the tumour diameter reached 5 mm, adriamycin was injected into peritoneal cavity. The size and growth inhibition of tumour were evaluated.
Results
  The mdr1 expression vector was constructed successfully and the MDR HCC line HepG2/mdr1 developed.  The PCR analysis showed that the specific fragment of mdr1 cDNA in HepG2/mdr1 cells, but not in the control group HepG2 cells. Furthermore, the content of the specific fragment of mdr1 mRNA and Pgp expression in HepG2/mdr1 cells were (59.7±7.9)% and (12.28±2.09)%, respectively, compared with (16.9±3.2)% and (3.07±1.06)% in HepG2 cells.  In the nude mice HCC model, the tumour genes of both groups were identified. After ADM therapy, the mean size of HepG2 cell tumours was significantly smaller than HepG2/mdr1 cell tumours.
Conclusion  The approach using the transfer of mdr1 cDNA may be applicable to the development of MDR hepatocarcinoma cell line, whose MDR mechanism is known. This would provide the experimental basis of MDR research.

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2.

Background  The role of epigenetics in gene expression regulation and development significantly enhances our understanding of carcinogenesis. All the tumor related genes may be the target of epigenetical or genetic regulation. We selected some epigenetically regulated genes for cDNA array analysis and observed variability in the expression of the DICER1 gene in distinct stages of gastric cancer. The aim of this study was to assess the correlation between the expression of DICER1, an epigenetically regulated gene, and gastric cancer.
Methods  To detect the expression of 506 tumor-associated genes, including DICER1, in the matched cancerous mucosa, pre-malignant lesion (adjacent mucosa), non-cancerous gastric mucosa and distant lymphocyte metastatic lesion in 3 cases of gastric cancers using cDNA array. DICER1 mRNA expression and DICER1 protein expression were further analyzed by Real-time PCR and Western blot in 32 cases of progressive gastric cancer. DICER1 protein expression was also detected in 33 early and 30 progressive gastric cancers by the immunohistochemistry (IHC) method.
Results  In 3 cases of gastric cancer cDNA array showed dramatically decreased expression of DICER1 in pre-malignant lesion, cancerous mucosa and distant lymphocyte metastatic lesions compared with matched noncancerous gastric mucosa, pre-malignant lesion and cancerous mucosa. Real-time PCR results showed that the expression level of DICER1 mRNA in gastric cancer was significantly down-regulated compared to normal gastric tissue (P<0.05). The IHC assay also showed that the expression of DICER1 was significantly decreased in progressive gastric cancer. Among the 63 cases of gastric cancers, 13/33 early (39.4%) and 19/30 (63.3%) progressive cancers showed negative expression of DICER1 (50.8%). The difference in expression of DICER1 between early and progressive gastric cancers was significant (P<0.01). The result of Western blotting showed that DICER1 protein was down-regulated significantly in advanced gastric cancer (P<0.05).
Conclusions  DICER1 expression is decreased during the progression of gastric cancer, especially in progressive gastric cancers, which indicating DICER1 may play an important role in the development of cancer and the epigenetical regulation involved.

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3.
Background  Pancreatic cancer is one of the most lethal human cancers with a very low survival rate of 5 years. Conventional cancer treatments including surgery, radiation, chemotherapy or combinations of these show little effect on this disease. Several proteins have been proved critical to the development and the progression of pancreatic cancer. The aim of this study was to investigate the effect of resveratrol on apoptosis in pancreatic cancer cells.
Methods  Several pancreatic cancer cell lines were screened by resveratrol, and its toxicity was tested by normal pancreatic cells. Western blotting was then performed to analyze the molecular mechanism of resveratrol induced apoptosis of pancreatic cancer cell lines.
Results  In the screened pancreatic cancer cell lines, capan-2 and colo357 showed high sensitivity to resveratrol induced apoptosis. Resveratrol exhibited insignificant toxicity to normal pancreatic cells. In resveratrol sensitive cells, capan-2 and colo357, the activation of caspase-3 was detected and showed significant caspase-3 activation upon resveratrol treatment; p53 and p21 were also detected up-regulated upon resveratrol treatment.
Conclusion  Resveratrol provides a promising anti-tumor stratagy to fight against pancreatic cancer.
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4.
《中华医学杂志(英文版)》2012,125(23):4270-4276
Background  Cervical cancer is one of the most common malignant tumors in women. This study was designed to explore the expression profiles of microRNAs (miRNAs) and mRNAs and the gene regulation network in cervical tumorigenesis and to find candidate molecular markers and key tumorigenic genes in cervical cancer.
Methods  miRNAs and mRNAs expression microarrays were used to detect the expression of miRNAs and mRNAs in normal and cancer cervical tissues. TargetScan 5.0 database (UK) was used to predict the target genes of the miRNAs, analyze their intersection with differentially expressed mRNAs and negatively correlate the intersection with miRNAs. Bioinformatic approaches were used to analyze functions and pathways of the target genes and establish miRNA-gene network.
Results  Twenty-nine miRNAs and 2036 mRNAs were differentially expressed in normal and cervical tumor tissues. Among them, 13 miRNAs and 754 mRNAs were up-regulated in cervical tumor tissues and 16 miRNAs and 1282 RNA were down-regulated. The 327 target genes negatively related to miRNAs in the intersection were involved in functions and signal pathways. Down-regulated miRNAs targeted genes and up-regulated miRNAs targeted genes were involved in 415 and 163 functions, respectively, and in 37 and 17 significant pathways, respectively (P <0.05, false discovery rate (FDR) <0.05). We constructed the miRNAs-gene network and found that hsa-miR-15a, hsa-miR-106b and hsa-miR-20b were key nodes in the network.
Conclusions  The differentially expressed miRNAs and mRNAs in cervical cancer and related miRNA-gene network have been identified. They play important roles in cervical tumorigenesis and are involved in many important biological functions and signal transduction pathways. These findings lay a foundation for research on the molecular mechanism of miRNAs in the pathogenesis of cervical cancer.
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5.

Background  Single nucleotide polymorphisms (SNPs) in the deoxycytidine kinase (dCK) gene are associated with chemosensitivity to nucleoside analogs. 2′,2′-Difluoro 2′-deoxycytidine (gemcitabine) is a first-line nucleoside analog drug in the treatment of pancreatic cancer. However, the association between SNPs in the dCK gene and chemosensitivity to gemcitabine has not been fully established. Therefore, the present study aimed to investigate the relationship between SNPs in the dCK gene and chemosensitivity to gemcitabine in human pancreatic cancer cell lines.

Methods  Seven SNPs in the dCK gene were sequenced in six human pancreatic cancer cell lines. The chemosensitivity of these six cell lines to gemcitabine were evaluated in vitro with a Cell Counting Kit-8 (CCK-8) test. Inhibition rates were used to express the chemosensitivity of pancreatic cancer cell lines to gemcitabine.

Results  The genotype of the A9846G SNP in the dCK gene was determined in six human pancreatic cancer cell lines. The cell lines BxPC-3 and T3M4 carried the A9846G SNP genotype AG, whereas cell lines AsPC-1, Mia PaCa2, SW1990 and SU86.86 carried the GG genotype. Cell lines with the AG genotype (BxPC-3 and T3M4) were more sensitive to gemcitabine compared with cell lines with the GG genotype (AsPC-1, Mia PaCa2, SW1990 and SU86.86) and significantly different inhibition rates were observed between cell lines carrying the AG and GG genotypes (P <0.01).

Conclusions  Variants in the A9846G SNP of the dCK gene were associated with sensitivity to gemcitabine in pancreatic cancer cell lines. The dCK A9846G SNP may act as a genetic marker to predict chemotherapy efficacy of gemcitabine in pancreatic cancer.

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6.
Background  A high mortality rate of pancreatic cancer becomes a bottleneck for further treatment with long-term efficacy. It is urgent to find a new mean to predict the early onset of pancreatic cancer accurately. The authors hypothesized that genetic variants of cationic trypsinogen (PRSS1) gene could affect trypsin expression/function and result in abnormal activation of protease activated receptor-2 (PAR-2), then lead to pancreatic cancer. The aim of this study was to elaborate some novel mutations of PRSS1 gene in the patients with pancreatic cancer.
Methods  Totally 156 patients with pancreatic cancer and 220 unrelated individuals as controls were enrolled in this study. The mutations of PRSS1 gene were analyzed by direct sequencing. K-ras Mutation Detection Kit was used to find the general k-ras gene disorder in the pancreatic cancer tissue. Then the clinical data were collected and analyzed simultaneously.
Results  There were two patients who carried novel mutations which was IVS 3 +157 G>C of PRSS1 gene in peripheral blood specimens and pancreatic cancer tissue. What’s more, it was surprising to find a novel complicated mutation of exon 3 in PRSS1 gene (c.409 A>G and c.416 C>T) in another young patient. The complicated mutation made No.135 and No.137 amino acid transfer from Thr to Ala and Thr to Met respectively. No any mutation was found in the normal controls while no mutations of k-ras gene were detected in the three patients.
Conclusion  Mutations of PRSS1 gene may be an important factor of pancreatic cancer.
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7.

Background  In recent years the interest of sustained drug delivery into inner ear is promising, at the same time a great deal of novel oral drugs using biodegradable vehicles have been produced to achieve sustained drug release. The aim of this study was to use biodegradable vehicles to release dexamethasone in the round window membrane application.
Methods  Dexamethasone gels composed of alginate and chitin were prepared and the release-permeating profiles were studied using a reproducible in vitro apparatus. A longer-period time course was simulated using the parameters acquired in this study. The data obtained in this study was compared with those of other studies in intratympanic drug delivery, and an appropriate initial dosage was extrapolated. 
Results  The combination of alginate and chitin could efficiently restrict dexamethasone diffusion and the time course suggested a sustained drug concentration within 24 hours. A higher initial dosage was estimated to achieve a stable therapeutic concentration in vivo.
Conclusion  The combination of alginate and chitin could be used as vehicle for sustained release of dexamethasone in intratympanic application.

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8.
Background  Gastric cancer ranks high among the most common causes of cancer-related death worldwide. This study was designed to explore key genes involved in the progression of normal gastric epithelial cells to moderate gastric epithelial dysplasia (mGED) and to gastric cancer.
Methods  Twelve pairs of mGED tissues, gastric cancer tissues, and normal gastric tissues were collected by gastroscopy. Total RNA was then extracted and purified. After the addition of fluorescent tags, hybridization was carried out on a Gene chip microarray slide. Significance analysis of microarrays was performed to determine significant differences in gene expression between the different tissue types.
Results  Microarray data analysis revealed totally 34 genes that were expressed differently: 18 highly expressed (fold change >2; P <0.01) and 16 down-regulated (fold change >2; P <0.01). Of the 34 genes, 24 belonged to several different functional categories such as structural molecule activity, extracellular regions, structural formation, cell death, biological adhesion, developmental processes, locomotion, and biological regulation that were associated with cancer. The remaining 10 genes were not involved in cancer research. Of these genes, the expression levels of Matrix metalloproteinase-12 (MMP12), Caspase-associated recruitment domain 14 (CARD14), and Chitinase 3-like 1 (CHI3L1) were confirmed by semi-quantitative RT-PCR. A two-way clustering algorithm divided the 36 samples into three categories and the overall correct classification efficiency was 80.6% (29/36). Almost all of these genes (31/34) showed constant changes in the process of normal gastric epithelial cells to mGED to gastric cancer.
Conclusions  The results of this study provided global gene expression profiles during the development and progression from normal gastric epithelial cells to mGED to gastric cancer. These data may provide new insights into the molecular pathology of gastric cancer which may be useful for the detection, diagnosis, and treatment.
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9.
Objective  To elucidate the development of mapping and localization of susceptible genes on chromosomes to asthma related phenotypes.
Data sources  Published articles about susceptibility genes for asthma related phenotypes were selected using PubMed.
Study selection  Using methods of candidate gene positional clone and genome-wide scan with linkage and association analysis to determine the location in the genome of susceptibility genes to asthma and asthma related phenotypes.
Results  There are multiple regions in the genome harboring susceptibility genes to asthma and asthma related phenotypes, including chromosomes 5, 11, 12, 6, 2, 3, 13, 7, 14, 9, 19 and 17. Many of these regions contain candidate genes involved in asthma development and progression. Some susceptible genes may affect the phenotype expression or response to therapy. In addition, the interaction of multiple genes with the environment may contribute to the susceptibility to asthma.
Conclusions  As an essential step toward cloning the susceptible genes to asthma, fine mapping and localization on chromosomes are definitely needed. Novel powerful tools for gene discovery and the integration of genetics, biology and bioinformatics should be pursued.
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10.
11.
目的 检测人胰腺癌干细胞对吉西他滨的敏感性,分析其差异性基因的表达,初步阐明其耐药分子机制.方法 运用流式技术从人原代胰腺癌和细胞系SW1990中分选CD24+CD44+ESA+细胞,行NOD/SCID鼠移植瘤实验验证其肿瘤干细胞特性;运用吉西他滨进行体内、外干预,检测胰腺癌干细胞凋亡和表达率变化情况.采用人类全基因组表达谱Affymetrix U133 plus2.0芯片对胰腺癌干细胞和非干细胞进行差异基因筛选.结果 人原代胰腺癌和细胞系SW1990中分选到CD24+CD44+ESA+(0.8%)和CD24+CD44+(3.6%)细胞,移植瘤实验证实其为胰腺癌干细胞.肿瘤干细胞凋亡率及表达率检测提示胰腺癌干细胞对吉西他滨显著耐药.与胰腺癌非干细胞比对,基因表达谱芯片筛查到胰腺癌干细胞820条差异基因,其中上调表达281个,下调表达539个.结论 胰腺癌干细胞对吉西他滨耐药,具有特征性基因表达谱,为阐明胰腺癌多药耐药机制及靶向治疗奠定基础.  相似文献   

12.
多药耐药相关蛋白MRP在胰腺癌细胞中的表达及意义   总被引:2,自引:0,他引:2  
目的初步探讨多药耐药相关蛋白(multidrug resistance-associated protein,MRP)在胰腺癌细胞中的表达情况及意义。方法采用反转录多聚酶链反应(RT-PCR)和免疫细胞化学方法,分别在基因和蛋白水平上检测MRP在8株人胰腺癌细胞株(SW1990、PCT-2、PCT-3、PCT-4、Aspc-1、Capan-1、Mia-PaCa-2及Panc-1)中的表达情况。结果RT-PCR结果显示,MRP存在于所有的胰腺癌细胞株中,平均表达水平为0.44±0.18,在PCT-2细胞中表达水平最低(0.10±0.03);免疫细胞化学结果证实在SW1990、Capan-1和Mia-PaCa-2三株细胞中MRP蛋白呈弱表达,在PANC-1、ASPC-1、PCT-4和PCT-3细胞中呈较强表达较强,而在PCT-2细胞中呈过度表达。结论MRP在胰腺癌原发性耐药中可能占有重要地位,在某些时候可能不通过提高转录水平而直接提高翻译产物的表达量而发挥其耐药作用。  相似文献   

13.
目的:研究吉西他滨耐药性胰腺癌细胞中Sonic hedgehog(Shh)信号通路异常激活的机制?方法:通过间歇梯度倍增法筛选出对吉西他滨产生耐药性的胰腺癌细胞SW1990-GEM,荧光实时定量PCR和蛋白质印迹法检测耐药细胞中PIAS1的表达;利用RNA干扰技术构建稳定低表达PIAS1的细胞株SW1990-GEM-shPIAS1,从增殖速度?克隆形成能力及裸鼠皮下成瘤能力等方面考察PIAS1?Shh信号通路与胰腺癌耐药性的相关性?结果:耐药株SW1990-GEM中PIAS1基因表达量明显升高;PIAS1的高度表达正向激活了Shh信号通路的活性,使得细胞获得耐药能力;人为降低PIAS1的高表达后,耐药株的耐药能力同时被减弱?结论:PIAS1是使耐药株获得耐药性的关键因子,PIAS1通过正向调控Shh信号通路使其获得耐药能力?  相似文献   

14.
目的观察肿瘤坏死因子相关凋亡诱导配体(TRAIL)对胃癌耐药细胞株SGC-7901/VCR多药耐药基因MDR1及其编码P-gp蛋白表达的影响,探讨以TRAIL为靶点逆转胃癌多药耐药的机制。方法 SGC-7901/VCR细胞株经不同浓度的TRAIL处理48 h后,RT-PCR检测各组胃癌细胞株中多药耐药MDR1 mRNA的表达情况,同时用ELISA法检测各组胃癌细胞株中P-gp表达的含量。结果不同浓度TRAIL(50、100、200、400μg/L)作用于细胞后,胃癌耐药细胞株SGC-7901/VCR的MDR1/P-gp表达受不同程度抑制,与对照组相比差异均具有统计学意义(P<0.05)。400μg/L与200μg/L组相比其MDR1/P-gp抑制程度并不明显,其余各组间差异均有统计学意义(P<0.05)。结论 TRAIL可抑制SGC-7901/VCR MDR1/P-gp的表达,且呈量效关系。TRAIL可能通过降低耐药基因MDR1的表达逆转胃癌的多药耐药。  相似文献   

15.
原发性肾癌组织中MDR1和MRP基因的表达   总被引:3,自引:0,他引:3  
①目的 研究肾癌组织中多药耐药 (MDR1)基因和多药耐药相关蛋白 (MRP)基因的mRNA表达及其临床意义。②方法 应用定量逆转录聚合酶链反应 (RT PCR) ,检测 2 0例原发性肾癌组织、10例正常人肾脏组织新鲜标本MDR1和MRP基因的mRNA表达水平。③结果 正常肾脏组织和肾癌组织均有MDR1和MRP基因表达 ,肾癌组织MDR1基因表达水平低于正常肾脏组织 ,MRP基因表达水平高于正常肾脏组织 ,差异有显著性 (t=2 .2 93,2 .96 8,P <0 .0 5 ,0 .0 1)。MDR1和MRP基因的表达与肾癌的病理类型、病理分期和组织学分级无关 ,与肾癌病人的无进展生存期无关 ,正常肾脏组织的MDR1基因和MRP基因的表达呈高度正相关关系 (r =0 .932 ,P<0 .0 1) ;肾癌组织MDR1基因和MRP基因的表达无明显相关关系。④结论 MDR1基因和MRP基因复合表达与肾癌固有的多药耐药现象有关  相似文献   

16.
高低转移人大肠癌细胞系基因表达谱差异   总被引:1,自引:0,他引:1  
目的用自制肿瘤转移相关基因cDNA微阵列研究人大肠癌高转移细胞系Lovo、SW620及低转移细胞系SW480、LS174T的基因表达谱差异,筛选与大肠癌转移相关的特异基因。方法分别提取4种大肠癌细胞系及对照的正常大肠上皮组织的mRNA,逆转录成cDNA探针,经cy3和cy5标记后分别与含有399个肿瘤转移相关基因的微阵列杂交,用专用软件分析杂交信号强度。结果高转移细胞系与低转移细胞系的基因表达谱有显著差异,其中有104个基因的表达值有意义,包括上调基因44个、下调基因60个。结论大肠癌转移是由其发生过程中多个基因表达的复杂变化决定的,高转移细胞系与低转移细胞系比较存在差异的基因可能与高转移特性有关。  相似文献   

17.
目的 探讨非霍奇金淋巴瘤(NHL)患者乳腺癌耐药蛋白(BCRP)的表达及其与药物敏感性的关系.方法 采用RT-PCR法检测比例NHL和5例慢性淋巴结炎患者新鲜淋巴组织标本中BCRP及多药耐药基因(MDR1)的表达水平;并对所有患者进行随访.结果 5例慢性淋巴结炎患者BCRP和MDR1表达均阴性;66例NHL患者BCRP阳性率45.5%,MDR1阳性率59.1%;T细胞淋巴瘤患者BCRP阳性率高于B细胞淋巴瘤者,NHL Ⅲ~Ⅳ期患者BCRP阳性率高于Ⅰ~Ⅱ期者(均P〈0.05);BCRP阳性患者的复发率高于阴性者,而缓解率和5年生存率均低于阴性者(均P〈0.05);BCRP和MDR1阳性、BCRP阳性和MDR1阴性、BCRP阴性和MDR1阳性、BCRP和MDR1阴性患者的化疗疗效均不同(均P〈0.05).结论 本组NHL患者BCRP和MDR1表达率较高,可能为化疗敏感性差的重要原因.  相似文献   

18.
目的:检测SOX7基因在胰腺癌细胞株中的表达及其启动子区的甲基化状态,初步探讨两者之间的关系?方法:采用RT-PCR检测SOX7基因在胰腺癌细胞株BXPC-3?CFPAC-1?PANC-1和SW1990中的表达水平?重亚硫酸盐测序PCR(bisulfite sequencing PCR,BSP)和结合重亚硫酸盐的限制性内切酶法 (combined bisulfite restriction analysis,COBRA)检测启动子区域甲基化状态?采用去甲基化药物5-氮杂胞苷(5-aza-2-adeoxycytidine,5-aza-dC)处理各细胞株后,检测SOX7基因的mRNA表达和甲基化状态变化?结果:在胰腺癌细胞株BXPC-3?CFPAC-1中SOX7基因的mRNA呈阳性表达,而在PANC-1和SW1990中SOX7基因表达沉默;与BXPC-3?CFPAC-1相比,PANC-1和SW1990中SOX7基因启动子区甲基化率较高?经过去甲基化处理后,PANC-1与SW1990中SOX7启动子区的甲基化率下降,基因重新表达?结论:胰腺癌细胞株PANC-1和SW1990中的SOX7基因表达与启动子区甲基化状态有关,启动子区的高甲基化导致PANC-1? SW1990中SOX7基因的表达沉默?  相似文献   

19.
Dong M  Feng FY  Lin C  Zhang XY  Fu M  Liang X  Zha YY  Lu HY  Wu M 《中华医学杂志》2004,84(4):323-328
目的 研究人肺腺癌吉西他滨耐药细胞系A549-Gem的耐药机制。方法 免疫组织化学法检测人肺腺癌吉西他滨耐药细胞系的P-糖蛋白的表达,逆转录-聚合酶链反应(RT—PCR)法检测多药耐药基因(mdr1)以及脱氧胞苷激酶(dCK)mRNA的转录,并采用基因芯片检测了A549和A549-Gem的基因表达谱。结果 A549-Gem中P一糖蛋白(P—gp)呈弱阳性表达,A549未见表达。。A549-Gem细胞中出现mdr1的mRNA转录增加,却未检测到dCK mRNA的产物。基因芯片检测A549和A549-Gem基因表达谱,结果表明,18.8%的基因出现差异表达,包括癌基因和抑癌基因、细胞周期相关基因、热休克蛋白基因、细胞凋亡相关基因、DNA转录因子(如锌指蛋白等)、DNA修复和重组基因、信号传导基因、蛋白翻译基因以及大量的代谢相关基因。结论 肺腺癌细胞对吉西他滨的耐药既与dCK缺乏相关,也有mdr1/P—gp高表达的参与。在肺腺癌细胞对吉西他滨产生耐药的过程中,发生了多种基因表达的变化,提示耐药的产生是多因素参与的复杂生化过程。  相似文献   

20.
目的:通过研究结缔组织生长因子(connective tissue growth factor,CTGF)基因对人胰腺癌SW1990细胞基质金属蛋白酶-9(MMP-9)、血管内皮生长因子(VEGF)表达及细胞增殖的影响,深入探讨CTGF在胰腺癌侵袭和转移中的作用机制。方法:经脂质体介导将含有CTGF重组表达质粒转染人胰腺癌SW1990细胞株,用G418筛选阳性细胞克隆及RT-PCR、蛋白质印迹法鉴定;采用RT-PCR和蛋白质印迹法检测阳性细胞克隆MMP-9及VEGF表达的改变;噻唑盐(MTT)比色法检测阳性细胞克隆的增殖活性。结果:成功建立稳定高表达CTGF的阳性SW1990细胞克隆,与对照组相比,阳性克隆MMP-9、VEGF mRNA及蛋白表达显著增高,细胞增殖活性也显著增加。结论:CTGF转染可显著增加胰腺癌细胞MMP-9、VEGF的表达并促进其细胞增殖,CTGF可能是胰腺癌基因治疗的潜在靶点。  相似文献   

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