摘要
目的:寻找一种构建动物大肠癌模型成功率高、周期短的方法,为大肠癌实验研究提供可靠的动物模型。方法:Wistar大鼠60只,随机分成三组,二甲基肼组23只,环磷酰胺组23只,对照组14只。二甲基肼组在大鼠皮下注射二甲基肼,8周后直肠黏膜下注射大肠癌细胞;对照组仅皮下注射二甲基肼8周;环磷酰胺组直肠黏膜下注射癌细胞前24h,腹腔内注射环磷酰胺。结果:直肠黏膜下注射癌细胞2周后,共52只大鼠完成实验,二甲基肼组有10只(50.0%)大鼠直肠黏膜可见癌结节形成;环磷酰胺组6只(30.0%)大鼠形成癌结节;对照组有4只(33.3%)大鼠直肠黏膜可见结节,其中,3只(25.0%)为不典型增生,1只(8.3%)为癌结节。二甲基肼组成功率较环磷酰胺组及对照组高(均P<0.01),环磷酰胺组与对照组差异无统计学意义(P>0.05)。结论:在应用二甲基肼的基础上,直肠黏膜下注射大肠癌细胞可成功诱发大鼠大肠癌,并优于免疫抑制为基础的方法。
Objective:To find a high incidence and short-period method of establishing a cancer model and provide a reliable animal model for experimental study of colorectal cancer.Methods:60 Wistar rats were randomly divided into DMH group(n=23),Cyclophosphamide group(n=23) and control group(n=12).Rats in DMH group were injected subcutaneously with DMH,then injected submucosally with colorectal cancer cells into rectum 8 weeks later.Rats in control group were only injected subcutaneously with DMH for 8 weeks;rats in Cyclophosphamide group were injected with Cyclophos phamide into peritoneal cavity,then injected submucosally with colorectal cancer cells into rectum 24 hours later.Results:After 2 weeks of injected submucosally with cancer cells,in DMH group,10 rats(50.0%) were found cancer nodules on their mucosa;in Cyclophosphamide group,6 rats(30.0%) were found cancer nodules on their mucosa;in control group,4 rats(33.3%) were found nodules on their mucosa,3(25.0%) with atypical hyperplasia,1(8.3%) with cancer nodule.The suc cess rate of DMH group was higher than that of Cyclophosphamide group and control group(P0.01).No significant difference was shown between Cyclophosphamide group and control group(P0.05).Conclusion:Based on the application of DMH,injecting submucosally with colorectal cancer cells into rectum can successfully induce colorectal cancer,this method is better than that of Cyclophosphamide group.
出处
《中国医药导报》
CAS
2010年第26期26-27,30,共3页
China Medical Herald
关键词
动物模型
大肠癌
大鼠
二甲基肼
Animal model
Colorectal cancer
Rat
1
2-dimethylhydrazine(DMH)