结肠癌肝转移模型构建方法的优化

Optimizing a method of establishing colon cancer liver metastasis models

背景:结肠癌转移途径主要有血行转移、腹膜转移和淋巴结转移等,最常转移的器官是肝脏,建立一个简单、合适的动物模型对于研究结肠癌肝转移的生物学行为、癌细胞的异质性、肿瘤转移机制至关重要。目的:通过切脾注射法建立结肠癌肝转移的动物模型。方法:将人结肠癌细胞株HT29孵育培养,通过建立BALB/c小鼠皮下移植瘤与脾脏注射并切除脾脏相结合的方法建立结肠癌肝转移瘤模型,观察肿瘤生长及转移情况,肝转移瘤组织病理学变化,以及肝转移瘤DNA含量和细胞周期。结果与结论:实验采用背侧正中线旁切口进行脾脏注射切脾法成功建立了人结肠癌肝转移瘤模型,成瘤率达8/8(100%)。移植瘤组织切片观察显示肿瘤为腺癌I-Ⅱ级。流式细胞术检查分析DNA倍体为异倍体。该模型为结肠癌转移的生物学研究提供了一个良好的技术平台。

BACKGROUND：The metastasis ways of colon cancer include blood metastasis, peritoneal metastasis and lymph node metastasis. Among them, the most common metastasis organ is the liver. It is necessary to establish a simple, suitable animal model to study the biological behavior of the colon cancer liver metastasis, the heterogeneity of cancer cells, and the mechanism of tumor metastasis. OBJECTIVE：To establish animal model of colon cancer liver metastasis with splenectomy injection method. METHODS：Human colon cancer celllines HT29 were cultured, and subcutaneously transplanted tumor was produced in BALB/c mice. Models of colon cancer liver metastases were established through spleen injection and excision of spleen method. The tumor growth and metastasis, the pathology of transplanted tumor, DNA content and cellcycle of the transplanted tumor were al determined. RESULTS AND CONCLUSION：In this study, we successful y established the model of colon cancer liver metastases through the spleen injection via the dorsal midline incision, the tumor formation rate reached 8/8 （100%）. Observation of tissue slice showed that the transplanted tumor was adenocarcinoma I-II. Flow cytometry analysis results showed that DNA ploid was heteroploid DNA. This model provides a good technical platform for biology research for colon cancer metastasis.