中文摘要：

为探讨5-氟尿嘧啶的药效、毒性与给药剂量之间的关系，采用BALB／c小鼠来源的CT26结肠癌细胞株构建小鼠结肠癌模型，分别给予10、20、30和50mg／kg剂量的5-氟尿嘧啶，分析其抗肿瘤效果、对小鼠体质量的影响和死亡率等指标．结果表明，5-氟尿嘧啶的体内抑瘤效果及毒性与剂量密切相关．综合分析评价各指标，认为20—30mg／kg剂量的5-氟尿嘧啶较适合于小鼠结肠癌模型中的药效评价．

英文摘要：

To investigate the relationship of anticancer effects, toxicity and dose, tumor syngeneic models were made from murine colorectal adenocarcinoma cell line CT26 derived from BALB/c mice. Mice were treated with various doses （10, 20, 30 and 50 mg/kg） of 5-fluorouracil （5-FU）, and the indexes were analyzed, including the anti-tumorigenic effects, body mass and mortality of mice. The results showed that the efficacy and toxicity of 5-FU was closely related to the doses, and the proposal dose was 20 -30 mg/kg which may be the optimal dose for drug research in tumor syngeneic model of mice.