原位基因治疗联合前药热化疗治疗结肠癌肝转移的实验研究

目的:探讨胞嘧啶睨氨酶(CD)基因联合5-氟胞嘧啶(5-FC)热化疗对裸鼠结肠癌肝转移的治疗效果.方法:30只BALB/c裸鼠经门静脉注射人结肠癌Lovo细胞建立结肠癌肝转移模型,随机分为转基因组和非转基因组,每组15只.转基因组:经腹腔注射病毒上清(0.2 mL/d,共5d)进行原位基因转染;非转基因组经蝮腔注射生理盐水(0.2 mL/d,共5d),2组同时腹腔注射42℃500 mg·kg-1·d-1)5-FC.治疗21 d后将动物处死,观察肝脏转移率和转移结节数,PCR法检测目的基因在肿瘤组织的整合,RT-PCR法检测目的基因在肿瘤组织的表达,观察肿瘤病理学变化.结果:目的基因成功转染并在肿瘤组织中有效表达.转基因组与非转移基因组肝脏转移率分别为26.7%(4/15)、100.O%(15/15),2组比较差异有统计学意义(P<0.05),肝脏转移结节数分别为0.60±0.83、2.40±0.99(P<0.001).镜下转基因组肝内转移癌细胞变性,染色体消失,可见凋亡小体,而非转基因组未见明显变化.结论:原位基因治疗联合前药热化疗对裸鼠结肠癌肝转移有明显抑制作用.

Anti-tumor effect of cytosine deaminase genetherapy in situ combined with thermochemotherapy for colon cancer liver metastasis in nude mice

Objective:To investigate the treatment effect of cytosine deaminase gene combined 5-FC thermochemotherapy for colon cancer liver metastasis in Nude Mice. Methods:The models of liver metastasis of colon cancer had been established by injecting human colon cancer cells Lovo into portal vein in 30 BALB/c nude mice,which were divided into transgenic group and non-transgenic group randomly. Transgenic group:virus supernatant was injected into abdominal cavity(0.2 mL/d,for 5 days); non-transgenic group:sodium chl...