大肠侧向发育型肿瘤细胞株的建立及其鉴定

Establishment of a novel epithelial cell line from laterally spreading tumor of colon

目的 为了深入研究大肠侧向发育型肿瘤 (LST)细胞的生物学特性及其发生发展的机制。方法 采用人LST组织进行肿瘤细胞建株及细胞分离与原代培养 ,传代至 70代进行细胞鉴定 ,包括细胞的形态结构分析、染色体分析和免疫组化分析等 ,并与非LST细胞作对比。结果 LST细胞为上皮来源的肿瘤细胞 ,多形性上皮细胞占大多数 ,其有近似肿瘤细胞的生长特性 ,群体倍增时间为 36h ;染色体数量为 4 2～6 6 ,85 %在三倍体范围内 ,并具有异常染色体核型 ;免疫组织化学观察ESA、CK2 0均呈阳性 ;超微结构具肿瘤细胞样表现和特征。结论 成功建立了 1个LST细胞株 ,并命名为LST R1细胞 ,为进一步深入研究LST细胞的生物学特性及大肠癌的发生发展机制奠定了基础。

Objectives In order to further investigate the biological characteristics and the developmental mechanisms of laterally spreading tumor, a cell line from the primary culture of human colon LST tissue was isolated. After 70 passages, we identified the cells by morphologic, genetic and immunohistochemistry analysis. Results (1) The origin of LST cells is epithelial, and the majority of which were multiform epithelial cells. It displayed an approximately similar growth characteristics of tumor cells. The nest corpus doubling time was 36 hours. (2) The number of chromosome is 42-66. Eighty-five percent of chromosomes were triploid, showing abnormal karyotypes. (3) Immunohistochemistry showed that ESA and CK20 were expressed. (4) The ultrastructure of LST was almost the same as that of a tumor cell. Conclusion A novel LST cell line has been established and named as LST-R1. It facilitates further study of the biological characteristics of LST cells and the development of colon cancer.