高低转移人卵巢癌细胞系基因表达谱差异

目的 用基因芯片技术研究高低转移人卵巢癌细胞系（HO－8910PM和HO－8910）基因表达谱差异,筛选与转移相关的基因。方法 分别抽提高低转移人卵巢癌细胞和对照正常卵巢上皮的总RNA并纯化mRNA;分别将等量的mRNA逆转录合成以图像,用软件对扫描图像进行数字化处理和分析。结果 HO－8910细胞与正常卵巢上皮比较差异3倍以上共有355个基因;HO－8910PM细胞与正常卵巢上皮比较差异3倍以上共有323个基因。HO－8910PM与母系HO－8910比较差异2倍以上共有163个基因,差异3倍以上共有21个基因。结论 两株人卵巢癌细胞与正常卵巢上皮细胞基因表达谱存在差异,提示这些基因与卵巢癌的发生和发展有关;HO－8910PM与HO－8910比较存在差异的基因可能与高转移特性相关。     

P38MAPK信号通路与uPA在卵巢癌细胞及组织中表达的相关性

背景与目的：P38丝裂原活化蛋白激酶(P38 mitogen-activated protein kinase,P38MAPK)信号通路参与多种肿瘤的发生、发展和转移过程,尿激酶型纤溶酶原激活剂(urokinase-type plasminogen activator,uPA)在肿瘤浸润和转移中发挥着重要作用。本实验研究卵巢癌组织中P38MAPK、细胞外信号调节激酶(extracellular signal-regulated kinase,ERK)、丝氨酸苏氨酸蛋白激酶(serine threonine kinase,AKT)及uPA的表达与临床病理特征的关系,并分析上述蛋白与uPA表达的相关性,探讨P38MAPK信号通路与uPA在卵巢癌细胞及组织中的表达及临床意义。方法：应用免疫组织化学法检测49例卵巢癌组织中uPA、P38MAPK、ERK和AKT蛋白的表达,采用蛋白［质］印迹法(Western blot)检测不同卵巢癌细胞系HO8910、HO-8910PM、SKOV3和CAOV3中uPA和P38MAPK蛋白的表达,使用特异性抑制剂SB203580阻断P38MAPK信号通路后检测uPA蛋白表达水平的变化。结果：uPA、P38MAPK、ERK和AKT蛋白在卵巢癌组织中的表达阳性率分别为61.22%、57.14%、53.06%和55.10%。uPA蛋白的表达与P38MAPK呈正相关(r=0.865,P=0.001),且与卵巢癌组织的临床病理分期(P=0.029)、分化(P=0.03)和转移程度(P_淋巴=0.022,P_大网膜=0.012)有关,而与患者的年龄(P=0.754)及组织学类型(P=0.652)无关。ERK、AKT蛋白的表达与卵巢癌淋巴结转移(P_ERK=0.011,P_AKT=0.022)和大网膜转移(P_ERK=0.006,P_AKT=0.000)有关,而与患者的年龄(P_ERK=0.000,P_AKT=0.022)、组织类型(P_ERK=0.771,P_AKT=0.245)及病理分期(P_ERK=1.000,P_AKT=0.254)无关。卵巢癌细胞系HO-8910PM中uPA蛋白的表达水平明显高于HO8910、SKOV3和CAOV3细胞系,使用SB203580阻断P38MAPK信号通路后可降低uPA蛋白的表达,且随着SB203580浓度升高uPA蛋白表达水平逐渐降低。卵巢癌中P38MAPK及uPA蛋白的表达与卵巢癌的预后显著相关(Log-rank=3.897和11.044,P=0.048和0.001)。结论：卵巢癌组织中P38MAPK信号通路处于激活状态;P38MAPK信号通路的激活可上调uPA的表达,促进卵巢癌的恶性进展;P38MAPK信号通路和uPA可能在卵巢癌侵袭和转移的过程中发挥重要作用。P38MAPK和uPA蛋白有望成为卵巢癌预后评估的重要指标。     

The gene expression profile of highly metastatic human ovarian cancer cell line by gene chip

In this paper, gene chip technique was used to analyze the difference of gene expression patterns in highly metastatic human ovarian tumor cell line HO-8910PM and in normal ovarian epithelial cells to explore the tumor-associated gene-cluster and its function in the process of occurrence an development of ovarian carcinoma. It will be helpful to comprehensively understand the molecular mechanism of cell transformation, to provide the molecular markers and target genes for clinical diagnosis a…     

卵巢癌细胞及组织中P38MAPK信号通路调控uPA蛋白的表达及临床意义

目的 探讨P38MAPK信号通路与uPA在卵巢癌细胞及组织中的表达及临床意义。方法 应用免疫组织化学法检测uPA、P38MAPK、ERK、AKT蛋白在49例卵巢癌组织中的表达,Westernblot检测HO8910及HO-8910PM细胞系中uPA、P38MAPK蛋白的表达,特异性抑制剂SB203580阻断P38MAPK信号通路后uPA蛋白表达水平的变化。结果 uPA、P38MAPK、ERK、AKT蛋白在卵巢癌组织中表达阳性率分别为61.22%、57.14%、53.06%、55.10%。uPA与p38MAPK蛋白表达呈正相关（r=0.8645,P=0.001）,且与卵巢癌组织的临床病理分期、分化、转移程度有关（P均<0.05）,而与患者的年龄、组织学类型无明显相关（P>0.05）。ERK、AKT蛋白表达与卵巢癌淋巴结转移、大网膜转移有关（P均<0.05）,而与患者的年龄、组织类型、病理分期无明显关系（P>0.05）。HO-8910PM细胞系中uPA蛋白的表达水平明显高于HO8910,SB203580阻断P38MAPK信号通路后可降低uPA蛋白的表达,且随着SB203580 浓度升高,uPA蛋白表达逐渐降低。P38MAPK及uPA蛋白的表达与卵巢癌的预后显著相关（r=3.897, 11.044, P=0.048,0.001）。结论 卵巢癌组织中P38MAPK信号通路处于激活状态;该通路的激活可上调uPA的表达,促进卵巢癌的恶性进展;P38MAPK信号通路和uPA可能在卵巢癌侵袭和转移的过程中发挥重要作用。P38MAPK和uPA蛋白有望成为卵巢癌预后评估的重要指标之一。     

用基因芯片筛选胃黏膜癌变相关基因

Objective： To study the difference of gene expression and screen the carcinogenesis associated gene in gastric mucosa by oligonucleotide microarray. Methods： Using the U133A gene chip to detect the gene expression profile difference between pericancerous mucosa （mucosa inside nearly 2 cm by cancer） and normal section of gastric mucosa. Bioinformatics was used to analyze the detected result on their localization and function in chromosome. Results＂ （1） A total of 150 genes with a difference of more than 3 times in expression levels by comparing the pericancerous mucosa with normal gastric mucosa, of 130 genes were up-regulated （SLR〉I.5）, and 20 were down- regulated （SLR〈 -1.5）. From the gene expression difference was to do the function classification, among those 22 enzyme and 6 enzyme regular genes were most one （18.7%）. The next were 17 nucleic acid binding associated genes （11.3%）. The third were 15 signal transduction associated genes （10%）. Fourth, were 13 protein binding associated genes （8.7%）. Besides the 40 genes were unknown their function, above mentioned 4 groups were 48.7% of the gene total number; （2） The pericancerous mucosa （P） and gastric cancer （T） were simultaneously compared with normal gastric mucosa, which had 71 genes with the same expression difference, of 61 genes were up-regulated （pericancerous SLR〉I.5）, and other 10 genes were down-regulated （pericancerous SLR〈 -1.5）. From their localization on the chromosome, there was simultaneously 71 genes appearance both in the pericancerous mucosa and in gastric cancer. The most one was 11 abnormal genes on the No. 19 chromosome. The next was No. 1, 2, 16 and 17 chromosomes which had 6 genes, respectively. It was not finding an abnormal gene on the No. 5, 14, 22 and Y chromosome. Conclusion： It suggested those genes may be related to the promotion in early gastric carcinogenesis and their progress. Four main groups （enzyme and enzyme regular, nucleic acid binding, signal transduction, protein binding） that associated gene＇s abnormality be played an importance role in studying the carcinogenesis of gastric cancer. The No. 19 and No. 1, 2, 16, 17 chromosomes are important sites of the oncogene transformation.     

Mouse trophoblastic cells exhibit a dominant invasiveness phenotype over cancer cells

Invasion process occurs both in mammalian embryo implantation during development and malignant cancer cell metastasis. We investigated the interactions between trophoblasts and metastatic cancer cells and found the phenomenon that mouse trophoblastic cells invaded the monolayer of malignant cancer cells in vitro and appeared the general trait of invasiveness to more than 30 types of malignant cancer cell lines which were derived from different histological origins and with different invasive or metastatic potential. We further investigated the cellular and molecular changes in the process of mouse trophoblastic cells invading human ovarian cancer HO-8910 cells. The results show that the invasion of trophoblastic cells lead HO-8910 cells near mouse embryo to apoptosis, and expression of cell-cycle-related protein cyclinD1 and Ki-67 mRNA were steadily remained both in mouse blastocysts and human ovarian cancer HO-8910 cells, which in part explain the proliferation activities of these cells. Our study also shows that expression of some proteins including MMP-9, FAK and Integrinαvβ3 was changeable in trophoblastic cells and HO-8910 cells in the process of blastocyst invasion, which suggested temporal expression of these molecules may involved in the invasive behavior of trophoblasts cells to cancer cells.     

A STUDY OF MULTI-GENE EXPRESSION IN THE HIGHLY METASTASIZING HUMAN OVARIAN CANCER CELL LINE HO-8910PM AND ITS MOTHER CELL LINE HO-8910

Ｒｅｓｅａｒｃｈｅｓｏｆｔｕｍｏｒｍｏｌｅｃｕｌａｒｂｉｏｌｏｇｙｉｎｒｅｃｅｎｔｙｅａｒｓｈａｖｅｐｒｏｖｅｄｔｈａｔｐｒｏｔｏｏｎｃｏｇｅｎｅａｎｄｔｕｍｏｒｓｕｐｒｅｓｏｒｇｅｎｅｐｌａｙｖｅｒｙｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｔｈｅｐｒｏｃｅ...     

卵巢上皮恶性肿瘤侵袭转移相关miRNA的筛选与鉴定

目的 探索与卵巢上皮恶性肿瘤侵袭转移可能相关的miRNA.方法 采用miRNA芯片,筛选SKOV-3ip和SKOV-3细胞差异表达miRNA.利用生物信息学软件TargetScan、MicroCosm、PicTar和GO,预测差异表达miRNA的靶基因及其功能.采用实时逆转录聚合酶链反应(real-time RT-PCR)技术,验证与卵巢癌侵袭转移可能相关的5种miRNA(let-7a、let-7e、let-7f、miR-22和miR-886-5p)在SKOV-3ip和SKOV-3细胞的表达.同时,检测这5种miRNA在另外一组侵袭转移能力不同的卵巢癌细胞株HO8910和HO-8910PM中的表达,并进行统计学分析.结果 基因芯片筛选显示,42种miRNA在SKOV-3ip和SKOV-3细胞株表达差异明显.进一步分析显示,let-7a、let-7e、let-7f、miR-22和miR-886-5p等5种miRNA可能与卵巢癌的侵袭转移密切相关.real-time RT-PCR结果证实,let-7f和miR-22在两组侵袭转移能力不同的卵巢癌细胞(SKOV-3和SKOV-3ip细胞、HO-8910和HO-8910PM细胞)表达差异有统计学意义(均P＜0.05).结论 let-7f和miR-22在侵袭转移能力强的卵巢癌细胞中低表达,可能具有抑癌基因的作用.     

Silencing of IQGAP1 by shRNA inhibits the invasion of ovarian carcinoma HO-8910PM cells in vitro

Background

IQGAP1 is a scaffolding protein and overexpressed in many human tumors, including ovarian cancer. However, the contribution of IQGAP1 to invasive properties of ovarian cancer cells remains unknown. Here, we investigated the effect of IQGAP1-specific short hairpin RNA (shRNA) expressing plasmids on metastatic potential of ovarian cancer HO-8910PM cells.

Methods

We used RT-PCR and Western blot analysis to characterize expression of IQGAP1 in three human ovarian cancer-derived cell lines SK-OV-3, HO-8910 and HO-8910PM. We then determined whether expression of endogenous IQGAP1 correlated with invasive and migratory ability by using an in vitro Matrigel assay and cell migration assay. We further knocked down IQGAP1 using shRNA expressing plasmids controlled by U1 promoter in HO-8910PM cells and examined the proliferation activity, invasive and migration potential of IQGAP1 shRNA transfectants using MTT assay, in vitro Matrigel-coated invasion assay and migration assay.

Results

IQGAP1 expression level seemed to be closely associated with the enhanced invasion and migration in ovarian cancer cell lines. Levels of both IQGAP1 mRNA and protein were significantly reduced in HO-8910PM cells transfected with plasmid-based IQGAP1-specific shRNAs. RNAi-mediated knockdown of IQGAP1 expression in HO-8910PM cells resulted in a significant decrease in cell invasion and migration.

Conclusion

Our findings support the hypothesis that IQGAP1 promotes tumor progression and identify IQGAP1 as a potential therapeutic strategy for ovarian cancer and some other tumors with over-expression of the IQGAP1 gene.     

长链非编码RNA FOXD2-AS1对卵巢癌细胞增殖和迁移的影响

  目的  观察长链非编码RNA（lncRNA）FOXD2-AS1对卵巢癌细胞增殖和迁移的影响。  方法  收集2017年2月至2017年9月华中科技大学同济医学院附属武汉儿童医院（武汉市妇幼保健院）手术切除的16例卵巢癌患者的组织标本,采用荧光实时定量聚合酶链式反应（quantitative PCR,qPCR）检测组织标本、人卵巢癌细胞系及人正常卵巢上皮细胞系中的FOXD2-AS1表达水平。将HO-8910细胞分为实验组和对照组,分别转染siRNA-FOXD2-AS1和阴性对照RNA。细胞计数CCK-8法、Transwell迁移实验分别检测沉默FOXD2-AS1表达对卵巢癌HO-8910细胞增殖活性和迁移能力的影响。生物信息学方法预测FOXD2-AS1的下游靶基因,qPCR检测下游靶基因表达,Western blot法检测葡萄糖调节蛋白94（glucose regulated protein94,GRP94）和信号通路Wnt/β-catenin的蛋白表达。  结果  卵巢癌组织中的FOXD2-AS1相对表达量8.56±0.51明显高于正常癌旁组织的2.38±0.21（P < 0.01）,FOXD2-AS1在卵巢癌细胞系OC3、HO-8910、A2780、SKOV-3中表达明显增加（P < 0.05）。下调FOXD2-AS1表达明显抑制卵巢癌HO-8910细胞的增殖活性和迁移能力（均P < 0.01）。生物信息学方法显示,FOXD2-AS1靶向结合miR-150-5p后,可靶向结合GRP94基因。实验组和对照组miR-150-5p相对表达量分别为5.45±0.91和1.01±0.08（P < 0.01）,GRP94 mRNA相对表达量分别为0.32±0.05和1.02±0.11（P < 0.01）。GRP94和Wnt/β-catenin信号通路蛋白表达减少。  结论  FOXD2-AS1在卵巢癌组织和细胞系呈高表达,下调FOXD2-AS1可调控miR-150-5p表达,抑制卵巢癌HO-8910细胞的增殖和迁移,可发挥抑癌基因的功能。      

p16基因在人卵巢上皮癌细胞系中的缺失分析研究

目的：了解新型抑癌基因ｐ１６在人卵巢上皮癌细胞系中的变异情况,为认识卵巢上皮癌的形成和发展依据。方法：应用ＰＣＲ扩增、ｍＲＮＡ原位杂交和免疫细胞化学方法,对５种人卵巢上皮癌细胞系ＣＡＯＶ３、ＯＶＣＡＲ３、ＡＯ、ＨＯ－８９１０及ＨＯ－８９１０ＰＭ进行分析。结果：５种人卵巢上皮癌细胞系中只有ＣＡＯＶ３（２０％）显示ｐ１６基因纯合性缺失,ＣＡＯＶ３细胞亦无ｐ１６基因ｍＲＮＡ及蛋白表达。ＯＶＣＡＲ３、Ｈ０     

HLA-G expression is associated with metastasis and poor survival in the Balb/c nu/nu murine tumor model with ovarian cancer

Aberrant HLA-G expression is associated with tumor invasiveness and poor clinical prognosis; however, there is a lack of preclinical animal model to address whether HLA-G plays a causal role in the unfavorable prognosis of malignancies. In the current study, ovarian carcinoma cell lines (HO-8910 and Ovcar-3) were transfected with HLA-G gene. HLA-G expression was analyzed with western blot and flow cytometry. Transwell experiment was performed to analyze the cell migration and invasion capability and/or multicellular spheroid formation was investigated with the 3D culture assay in vitro. The effects of HLA-G expression for tumor cell organ metastasis and for mouse survival was analyzed with the Balb/c nu/nu mouse model. Our data showed that HO-8910-G and Ovcar-3-G cells are of higher invasion potential compared with the parental HO-8910 and Ovcar-3 cells. Multicellular spheroid formation exists only in HO-8910-G cells in a 3D culture assay. In Balb/c nu/nu mouse model, widespread metastasis was observed in mice xenografted with HO-8910-G cells, but not in the group with parental cells. Mouse survival was dramatically decreased in HO-8910-G and Ovcar-3-G xenografted mice than that with HO-8910 and Ovcar-3 cells, respectively. In summary, our study provided the first evidence that HLA-G expression is associated with tumor metastasis and with poor survival in an animal model with ovarian cancer.     

P16 GENE EXPRESSION IN OVARIAN EPITHELIAL CYSTADENOCARCINOMA

Itiswellknownthatc-oncogeneovereXPressionaswellasantioncogeneabsenceorinactivationplayaveryimportantroleincarcinogenesis.P16gene(orMTSI,Multipletumorsuppresser1)hasbeenwidelyanalyzedinvariousprimarytumors,suchasmelanoma,neuroblastomaandtumorsinkidney,esophagus,stomach,bladder,breastandpancreas.Theresultsfromdifferentresearchshowedahigh-frequentP16genemutationandabsence.'-ToexplaintherelationshipbetweenP16geneandovarian'cancer,wehadanalyzedP16expressioninhumanovarianpoorlydifferentiatedcyst…     

Establishment of a highly metastatic human ovarian cancer cell line (HO-8910PM) and its characterization.

To establish a highly metastatic human ovarian cancer cell line and to study its characteristics tissue from the tumor mass of a nude mouse of 7th subtransplantation of the highly metastasizing human ovarian cancer model (NSMO) was cultured in vitro and the cell line HO-8910PM was established. The cell line grew well through 87 passages and the mitotic index, chromosome analysis, morphology under electron microscope and some oncoprotein expression were studied. The cell doubling time was 34.5 h and the mitotic index was 44.3%. The cells were all of epithelial type and most of them were of polygonal shape. Electron microscopic examination showed malignant nuclei with enlarged nucleoli and abundant microvilli. The plating efficiency in soft agar was 31.2%. The cell agglutination appeared in 4 ug/ml PHA. Chromosomal analysis revealed a mode of 54 per cell. The DNA index was 1.57 measured by FCM. Both of them showed hyperdiploid. Positive ER and PR granules were found in the cells. After hetero-transplantation of the cells into three nude mice all of the latter showed tumor growth with metastasis in lungs or lymph nodes. Eight of the nine kinds of oncoprotein detected by immnohistochemical method were found in the cells. The detection for mycoplasma showed negative. After storage in liquid nitrogen cell growth was stable. The cell line HO-8910PM can meet the criteria for the establishment cell lines. This cell line and NSMO model would be very useful in study of the mechanism of cancer metastasis in identifying various cellular factors regulating local and distant metastasis and also in establishing a rational approach for searching after anti-metastatic agents.     

DOC-2对卵巢癌细胞HO-8910致瘤力的影响

背景与目的：作为近年发现的新的肿瘤抑制基因，DOC-2的作用机制还不完全清楚。本实验的目的在于观察DOC-2转染后对卵巢癌细胞系HO-8910在克隆形成率、细胞周期、裸鼠致瘤能力等方面的影响，并对其作用机制进行初步探讨。方法：实验分3组：卵巢癌细胞系HO-8910（无DOC-2基因的表达）、8910-P93（经转染并表达DOC-2基因）、8910-pcDNA3．1（转染空载体pcDNA3．1），首先通过软琼脂克隆形成实验比较3组细胞克隆形成率的差异，之后利用流式细胞仪观察其细胞周期的变化，最后用裸鼠荷瘤实验进一步验证DOC-2对肿瘤细胞致瘤能力的影响。结果：卵巢癌细胞系HO-8910在转染DOC-2后其克隆形成率明显降低，与转染前差异明显（P〈0．05），同时G．和G，期细胞明显增多而S期细胞明显减少，移植瘤裸鼠荷瘤实验显示HO-8910-P93细胞在裸鼠体内生长缓慢，肿瘤体积及重量均明显低于对照组（P〈0．05）。结论：DOC-2基因能明显抑制卵巢癌细胞系HO-8910的致瘤力。     

Snail is critical for tumor growth and metastasis of ovarian carcinoma

Snail, a key inducer of epithelial‐mesenchymal transition (EMT), plays an important role in cancer metastasis. To better understand the role of Snail in the metastasis of ovarian carcinoma, expression of Snail was knocked down by antisense‐Snail in the highly metastatic ovarian cancer cell line HO8910PM. Gene array analysis revealed that blocking Snail expression suppressed the activity of matrix metalloproteinases (MMPs) and upregulated TIMP3, an MMP inhibitor. These findings suggest that Snail interacts with MMP during tumor invasion and metastasis. In addition, we examined the role of Snail in an ovarian cancer orthotopic model by using the antisense‐Snail HO8910PM cell line. We found that the size of primary ovarian cancer tumor and the number of metastatic lesions were significantly reduced when Snail was knocked down. Confirming our initial findings, the activity of MMP2 was greatly inhibited in tumors from antisense‐Snail cells. Furthermore, immunohistochemical analysis on ovarian cancer progression tissue array demonstrated that the expression of Snail was significantly higher in metastatic lesions, and Snail expression correlated with the stage of ovarian cancer. Interestingly, in early‐stage tumors, Snail was localized in both the cytoplasm and nucleus. In late stage and metastatic lesions, the level of Snail was elevated, and Snail was localized to the nucleus. The expression level and nuclear localization of Snail were also inversely correlated with E‐cadherin expression. Overall, our study indicates that Snail plays a critical role in tumor growth and metastasis of ovarian carcinoma through regulation of MMP activity.     

肺癌高转移和低转移细胞株中差异基因的分析

目的:以人肺癌低转移细胞株SPC-A-1为对照,分析人肺癌高转移细胞株SPC-A-1sci的分子转移机制及其相关的信号通路,寻找肺癌转移的关键基因.方法:应用芯片技术检测人肺癌低转移细胞株SPC-A-1和高转移细胞株SPC-A-1sci的差异基因.采用显著性通路分析和构建信号转导网络等生物信息学分析方法寻找肿瘤转移相关的潜在关键基因和信号通路.结果:与SPC-A-1细胞比较,SPC-A-1sci细胞共有上调表达的差异基因2 892个,下调表达的差异基因3 248个;上调差异基因参与的显著性信号转导通路共有48条,下调差异基因参与的显著性信号转导通路共65条.网络中的关键基因主要是丝裂原活化蛋白激酶1、表皮生长因子受体、AKT1、AKT3、PIK3CD( phosphoinositide-3-kinase,catalytic,delta polypeptide)、PIK 3R1 [phosphoinositide-3-kinase 3,regulatory subunit 1 (alpha)]、PIK 3R3、KRAS和胰岛素样生长因子1受体等.结论:人肺癌高转移细胞株SPC-A-1sci的基因芯片检测和生物信息学分析为肺癌转移的基础研究和临床防治提供了依据.     

基质金属蛋白酶-24在卵巢浆液性囊腺癌细胞株中的表达

目的探讨基质金属蛋白酶－24(MMP-24)基因在卵巢癌细胞株中的表达及临床意义。方法应用半定量RT-PCR和Western blot对卵巢浆液性囊腺癌细胞株OVCa-R₃、SKOV₃ 、HO-8910及人卵巢细胞株TC-1进行检测。结果3种卵巢癌细胞株中MMP-24基因和蛋白的表达均增强,与正常卵巢细胞相比,差异有统计学意义。结论MMP-24基因可能与卵巢癌的发生、发展有关。     

紫杉醇作用卵巢癌细胞系HO-8910后CYP1B1 mRNA及蛋白表达差异的研究

背景与目的:用紫杉醇(paclitaxel,PTX)对卵巢癌细胞系HO-8910进行体外化疗后,观察CYP1B1表达的变化,以期探讨CYP1B1基因表达与肿瘤细胞耐药的关系. 材料与方法:以不同浓度PTX(分别为30、15、7.5、3.75、1.88、0.94、0.47 μg/mi)处理H0-8910细胞.采用四甲基偶氮唑蓝(MTT)比色法检测PTX对HO-8910细胞体外生长的抑制作用,实验同时设只加培养液的对照组.以5 μg/ml PTX分别处理HO-8910细胞24 h、48 h、72 h和50#g/ml PTX处理细胞24 h后,用RT-PCR技术检测存活的卵巢癌细胞中CYP1B1 mRNA的表达水平,用Western blot检测细胞CYP1B1蛋白表达.结果:PTX能抑制HO-8910细胞生长,7种不同浓度的PTX作用72 h后,细胞的抑制率分别为89.10%、76.82%、67.39%、57.27%、46.21%、37.02%、17.56%,随着药物浓度的下降,其抑制率明显降低,各浓度组细胞抑制率间的差异具有统计学意义(P<0.05).经PTX处理后存活的HO-8910细胞中CYP1B1 mRNA及蛋白的表达量增加,高于对照组;5 μg/ml PTX处理HO-8910细胞48 h、72 h和50 μg/ml的PTX处理24 h组,CYP1B1蛋白的表达量高于5 μg/ml PTX处理24 h组(P<0.05).结论:CYP1B1在卵巢癌细胞系中呈高表达,CYP1B1基因在卵巢癌细胞系H0-8910体外PTX化疗中起抑制作用.     

不同转移潜能人肝癌细胞系的基因表达分析

目的：比较不同转移潜能人肝癌细胞系的基因表达谱,寻找与癌转移相关的基因表达改变。方法：采用基因芯片技术,比较遗传背景相同但转移力有明显差异的两个细胞系MHCC97－L和HCCLM3,分析其基因表达谱的差异。结果：在1626个候选基因中,筛选出25个差异表达基因。HCCLM3与MHCC97－L相比,表达上调的基因有8个,包括细胞增生基因E25、信号传导基因NKK6和免疫相关基因SP40,40等;下调的有17个,包括细胞周期调控基因Rb2、信号传导基因PKCβ2和错配修复基因hMSH2等。结论：肝癌转移是多基因作用的综合结果,筛选的基因对预测转移和抗转移干预措施可能有指导意义。