MICROARRAY ANALYSIS OF DIFFERENT GENE EXPRESSION OF HUMAN CERVICAL CANCER SUBCLONE CELL LINES

Objective To examine the differentially expressed invasion-related genes in two anchorage-independent uterine cervical carcinoma cell lines derived from the same patient using a cDNA array. Methods Two human uterine cervical carcinoma subclonal cell lines CS03 and CS07 derived from a single donor line CS1213 were established by limited dilution procedure. The two cDNA samples retro-transcribed from total RNA derived from CS03 and CS07 cells were screened by a cDNA microarray carrying 234 human cell-cycle related genes and 1011 human signal transduction and membrane receptor -associated genes, scanned with a ScanArray 3000 laser scanner. Results The cDNA microarray analysis showed that ]2 genes in CS03 were up-regulated compared to CS07, and 24 genes in CS07 were upregulated. The function of a number of differentially expressed genes was consistently associated with cell-cycle, cell proliferation, migration, apoptusis, signal transduction and tumor metastasis, including p34^cdc2, TSC22, plasminogen activator inhibitor Ⅰ （PAI-1）and desmusome associated protein（Pinin）. Conclusion Multiple genes are differentially expressed in uterine cervical carcinoma cell lines even came from the same patient. It is suggested that these genes are involved in the different phenotypic characteristics and development of cervical carcinoma.     

不同表型的人宫颈癌细胞亚克隆株的基因表达谱

目的　采用基因芯片技术分析同一人宫颈癌细胞株来源 ,锚着依赖性不同的两个亚克隆细胞株的侵袭相关基因表达。方法　采用有限稀释法建立CS12 13细胞的CS0 3和CS0 7亚克隆细胞株 ,检测其在软琼脂中的集落形成率 ,分别用流式细胞术和免疫组化法观察细胞黏附分子CD4 4和E cadherin、Fibronetin的表达 ,并将CS0 3和CS0 7细胞的总RNA经逆转录获得的cDNA作为探针 ,与含 10 11个与细胞信号转导和细胞膜受体相关基因表达谱芯片杂交 ,信号用ScanArray 30 0 0扫描分析。结果　CS0 3和CS0 7细胞的集落形成率分别是 0和 38.5 % ,CD4 4表达分别是 35 .1%和 13.7% ;两者的基因表达谱差异明显 ,CS0 3细胞中表达上调的基因为 12个 ,CS0 7细胞中有 2 1个基因表达增加 ,其中一些与细胞增生、迁移、凋亡 ,细胞间信号传导和肿瘤转移相关 ,包括p34cdc2 、转化生长因子 β刺激蛋白 (TSC2 2 )、纤维蛋白酶原活性因子抑制剂 (PAI 1)和桥粒相关蛋白 (PININ)等。结论　同一来源的人宫颈癌细胞株中有多个差异表达基因 ,它们参与人宫颈癌细胞的表型特征 ,可能影响肿瘤的进展。     

人乳头瘤病毒16型转化基因的筛选及次级克隆

人乳头瘤病毒16型转化作用在宫颈癌发生中可能起重要作用,其转化基因主要位于基因组早期区域E6、E7开放阅读框架内。为了进一步研究HPV16转化作用,我们以Pstl+ECoRI酶解HPV16DNA,以pUC-19为载体,大肠杆菌JM103细胞为宿主菌,经两次定向次级克隆,组建了质粒pEP-8。经限制性核酸內切酶和Southem转印杂交证实,其插入片段为-1.43Kb带有E6、E7 ORF的DNA片段。在E6区上游序列还含有两个TATA盒,1个Cat盒和1个细胞特异性增强子。该质粒的组建为检测HPV感染细胞中mRNA转录提供了特异性的早期基因探针,同时为进一步研究HPV转化作用及转化蛋白打下了基础。