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肿瘤细胞是从正常细胞转变而来的，但当它变为肿瘤细胞后就具有异常的形态、代谢及功能。肿瘤的胞最大的特征之一是获得“永生”，其中端粒酶的活化起着关键性的作用[1]。端粒酶（Telomerase）是催化DNA末端结构端粒（Telomere）合成的逆转录酶，具有使肿瘤细胞继续复制生存的
Tumor cells are transformed from normal cells, but when they become tumor cells they have abnormal morphology, metabolism and function. One of the most prominent features of tumor cells is the acquisition of “immortality,” in which telomerase activation plays a key role [1]. Telomerase is a reverse transcriptase that catalyzes the synthesis of telomere in the terminal structure of DNA. It has the ability to allow tumor cells to continue to replicate and survive.