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Preparation and evaluation of 131I-quercetin as a novel radiotherapy agent against dedifferentiated thyroid cancer

Xie Qinghua,Li Xia,Wang Guanquan,Hou Xuan,Wang Yujun,Yu Hongbo,Qu Changfa,Luo Shunzhong,Cui Yali,Xia Chuanqin,Wang Ruibing

Here we reported the radiolabeling and evaluation of a novel 131 I-radiolabeled quercetin for the treatment of dedifferentiated thyroid cancers. The human thyroid cancer cell lines (FTC-133, TT and DRO) experienced much higher uptake of 131 I-quercetin as compared to the free 131 I. And the proliferation inhibition rate of 131 I-quercetin on in vitro DRO cell line was 86.87 ± 7.15%. Biodistribution and SPECT analysis demonstrated that the injected radioactivity mainly accumulated in tumors. The tumor volume in the treatment group was dramatically inhibited in comparison with the control group.