摘要
背景与目的肿瘤转移是一个多基因参与的复杂过程。由肿瘤转移所导致的恶性肿瘤患者死亡率高、预后差和其发生机制不清,长期以来一直是肿瘤学领域的突出问题。本研究利用基因芯片技术比较高低淋巴道转移能力小鼠肝癌细胞系Hca-F(高转移)和Hca-P(低转移)的基因表达谱,并筛选出与肿瘤淋巴道转移相关的基因。方法分别提取Hca-F和Hca-P细胞的总RNA,反转录合成双链cDNA,通过体外反转录合成生物素标记的cRNA探针,cRNA探针经片段化处理后分别与AffymetrixGeneChip誖MOE430A(包括22690个转录本对应于约14500个小鼠已知基因和4371个EST)杂交,杂交信号经扫描等处理并用生物信息学对检测结果进行分析。结果与Hca-P细胞相比较,Hca-F细胞中有901个(6.2%)基因表达上调幅度≥2倍,有129个(3%)EST上调幅度≥2倍。在公布的差异最显著的33个包括endoglin(EDG;CD105)、Mcam(Muc18;Mel-CAM;CD146)、Cdc42ep5(CEP5;Borg3)、Ptprr(proteintyrosinephosphatase,receptortype,R)、F2r[coagulationfactorⅡ(thrombin)receptor;Par1;ThrR]、D7Ertd458e(necl-5)、NR1D1、Serpinh1(HSP47)、AXL、Mak和Areg(AR)等基因表达中,上调幅度在29.86～13.93倍之间。根据GO(GeneOntology)分类和Treeview分析,这33个基因的功能主要为促血管生成、细胞粘附、信号转导、细胞运动、转录、分子伴侣活性、蛋白激酶活性和受体结合等。结论高通量的基因芯片技术筛选出大量淋巴道转移相关基因,对这些转移相关基因功能的验证有助于找到淋巴道转移的关键(代表)基因/通路,它们可作为肿瘤淋巴道转移诊断的指标和治疗的靶点。
BACKGROUND & OBJECTIVE: Metastasis is a complex process involving multiple genetic changes. The high mortality and poor prognosis caused by metastasis in malignant tumor patients and the uncertain mechanisms are always the prominent problems in the field of oncology. In order to screen for lymphatic metastasis-associated genes, the gene expression profiles of mouse hepatocarcinoma cell lines Hca-F (highly metastatic) and Hca-P (low metastatic) were compared by gene chip. METHODS: Total RNA was isolated from Hca-F and Hca-P cells, and synthesized into double-stranded cDNA, then synthesized into biotin-labeled cRNA probes by in vitro transcription. The cRNA probes were separately hybridized with Affymetrix GeneChip?誖 MOE430A (containing 22 690 transcripts, including 14 500 known mouse genes and 4 371 ESTs), and the signals were scanned by the GeneArray Scanner. The results were analyzed by bioinformatics. RESULTS: Compared with the gene expression profile of Hca-P cells, 901 (6.2%) genes and 129 (3%) ESTs were up-regulated by at least 2 folds in Hca-F cells; 33 genes, including endoglin (EDG; CD105), Mcam (Muc18; Mel-CAM; CD146), Cdc42ep5 (CEP5; Borg3), Ptprr (protein tyrosine phosphatase, receptor type, R), F2r [coagulation factor Ⅱ (thrombin) receptor; Par1; ThrR], D7Ertd458e (necl-5), NR1D1, Serpin h1 (HSP47), AXL, Mak, and Areg (AR), were up-regulated 13.93-29.86 folds. According to Gene Ontology and Treeview analysis, these 33 genes were involved in angiogenesis, cell adhesion, signal transduction, cell motility, transcription, chaperone activity, protein kinase activity, receptor binding, and so on. CONCLUSION: Many lymphatic metastasis-associated genes were screened by high-throughput gene chip method; validating their cellular functions will help to identify the key or candidate gene/pathway responsible for lymphatic metastasis, which might be used as diagnostic markers and therapeutic targets for lymphatic metastasis.
出处
《癌症》
SCIE
CAS
CSCD
北大核心
2005年第7期774-780,共7页
Chinese Journal of Cancer
基金
国家自然科学基金项目(No.30371583)~~
关键词
肝肿瘤/遗传学
细胞株
基因芯片
淋巴转移
小鼠
Liver neoplasms/genetics
Cell line
Gene chip
Lymphatic metastasis
Mouse
