人结肠癌裸鼠原位种植癌及转移模型的建立

Establishment of orthotopic implantation tumor and metastasis model of human colon cancer in nude mice

目的 建立人结肠癌裸鼠原位种植瘤模型 ,为研究结肠癌的转移机制和抗转移治疗提供动物模型。方法 采用人结肠腺癌细胞株SW 1116接种于裸鼠皮下 ,形成稳定传代的皮下种植瘤。再取该肿瘤组织块原位种植于裸鼠结肠壁 ,建立类似于临床的结肠癌模型。观察原位种植肿瘤的成瘤率 ,生长情况 ,转移率和腹水出现率。结果 原位种植成瘤率为 10 0 % ( 2 4/2 4) ,区域淋巴结转移率10 0 % ( 2 4/2 4) ,腹膜转移率为 91.7% ( 2 2 /2 4) ,肝转移率为 75 .0 % ( 19/2 4) ,腹水出现率为 2 5 .0 %( 6/2 4)。荷瘤裸鼠晚期出现消瘦和全身衰竭 ,中位生存期为 10周。结论 该实验的裸鼠原位种植转移模型的生物学行为与临床病程非常相似 ,为研究结肠癌转移机制和抗转移治疗提供理想的动物模型。

Objective To establish an orthotopic implantation and metastasis model of human colon cancer in nude mice. Methods Tumor cell line SW1116 of human colon adenocarcinoma was inoculated subcutaneously into nude mice to develop implantation tumor.Histologically intact tumor tissue was then harvested and implanted to the colon wall of nude mice to set up a model similar to human colon cancer.The formation of implanted tumor rate, local tumor growth characteristics,and metastasis rates were examined. Results A 100% lymphatic metastasis rate was obtained in this model. The incidences of local lymphatic metastasis, peritoneal and liver metastases were 100%, 91.7% and 75.0% respectively.Emacication and exhaustion of the nude mice were presented in late stage of the experimentation. The median survival time of the tumor-bearing nude mice was 10 weeks. Conclusions The orthotopic implantation tumor and metastasis model provide useful tools for the study of mechanism of metastasis and its treatment of human colon cancer.