[Therapeutic effect of 125IUdR on the glioma cell line C6 in vitro and in vivo].

OBJECTIVE

To investigate the therapeutic effect of 125IUdR on gliomas.

METHODS

By means of growth-curve, clonogenic formation experiment and MTT assay, the inhibitive effect of 125IUdR on the proliferation of C6 cells was studied in vitro. Wistar rats with intracerebral C6 gliomas were used to verify the therapeutic efficacy of 125IUdR in vivo.

RESULTS

C6 monolayer cells were efficiently inhibited by 125IUdR in a time-and-dose-dependent manner. In the MTT assay, after treament with 150 kBq/ml 125IUdR for 5 days, the inhibition rate reached 93.06%. In murine transplantable tumor, 125IUdR had significant therapeutic effect on rats bearing solid tumor glioma C6. After treatment with 125IUdR for 5 days, the tumor weight of experiment group was lower than that of blank group and control group (P<0.01). The median survival of animals treated with 125IUdR (27 days) was markedly longer than that of control group (9 days) (P<0.01). Na 125I and 127IUdR showed little inhibitive effect on the proliferation of C6 cells in vitro and in vivo.

CONCLUSION

125IUdR can markedly inhibit the growth of Glioma cell line C6. 125IUdR has potential for the treatment of malignant brain tumor.