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０引言肿瘤转移是恶性肿瘤最基本的生物学特征．为在基因水平揭示肿瘤转移的本质，研究者均把重点放在筛选和鉴定转移相关基因上．继差示文库或减数杂交技术［１］后，出现了分离差异表达基因的新方法差示ＰＣＲ（ｄｉｆｅｒｅｎｔｉａｌｄｉｓｐｌａｙＰＣＲ）［２］．我...
0 Introduction Tumor metastasis is the most basic biological characteristics of malignant tumors. To reveal the nature of tumor metastasis at the genetic level, researchers have focused on the screening and identification of metastasis-related genes. Following the differential library or subtractive hybridization [1], a new method differential PCR (diferential display PCR) [2] has emerged to separate differentially expressed genes. I...