胞嘧啶脱胺酶/5-氧胞嘧啶基因系统对前列腺癌细胞系生长的抑制作用

The inhibitory effect of CD/5-FC system on the prostate cancer cell DU145 and RM-1 in vitro

目的 探讨胞嘧啶脱胺酶 (cytosinedeaminase,CD) / 5 氟胞嘧啶基因 (5 FC)基因系统对体外前列腺癌细胞生长的作用。 方法 经基因重组并纯化的腺病毒AdCMVCD分别感染体外前列腺癌细胞DU 14 5、RM 1,观察CD/ 5 FC系统对细胞的生长抑制作用和旁观者效应。 结果 CD/5 FC系统能明显抑制体外前列腺癌细胞系DU14 5、RM 1的生长 ,经 10 0m .o .i(multiplicityofinfec tion)AdCMVCD感染并加入 15 .5mmol/L 5 FC后 4、6d ,细胞抑制率高于 97% ;同时此系统具有很强的旁观者效应 ,当受染细胞混合比例为 10 %时 ,即有 >75 %的细胞被杀死。 结论 CD/ 5 FC系统是一种有效的基因治疗方法 ,旁观者效应为此系统在实体肿瘤中的应用提供了可行性。

Objective To study the inhibitory effect of CD/5 FC system on the prostate cancer cell DU145,RM 1 in vitro. Methods In vitro prostate cancer cells DU145 and RM 1 were infected by recombinant adenoviral vector and then the inhibitory effect and the bystander effect of CD/5 FC system were observed. Results CD/5 FC system had a remarkable inhibitory effect on prostate cancer cell DU145 and RM 1 in vitro, the inhibition rates being higher than 97% when infected by AdCMVCD after 4 days added with 15.5mmol/L 5 FC. A strong bystander effect could also be observed, more than 75% tumor cells being killed when only 10% were infected. Conclusions CD/5 FC system may serve as an effective gene therapeutic method.The existence of bystander effect makes itself available in the use of tumor treatment in vivo.