Abstract
In this study, we labeled trastuzumab with (177)Lu to synthesize a new radiopharmaceutical for therapy of breast cancer and at the first stage investigated its therapeutic effects on SKBr3 and MCF7 breast cancer cell lines. Trastuzumab-(177)Lu showed very good in-vitro characteristics such as high radiochemical purity (91+/-0.9%), good stability in PBS buffer (86+/-2.3%) and blood serum (81+/-2.7%) up to 96 h, appropriate immunoreactivity (85.4+/-1.1%) and high cytotoxicity in HER2 expression cells. 5 fold increase in toxicity of trastuzumab-(177)Lu was observed when compared with unlabeled trastuzumab on SKBr3 cells.
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