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- W2149013235 abstract "The aim of the current study was to investigate the therapeutic effect of 227Th-radioimmunotherapy on intraperitoneally growing human bioluminescent HER2 positive ovarian cancer cells. Methods: In vitro toxicity of 227Th-trastuzumab in bioluminescent SKOV3-luc-D3 ovarian cancer cells was assessed in a growth assay. The biodistribution of intraperitoneally administrated 227Th-trastuzumab in athymic nude mice without tumor cells was determined. For in vivo therapy, seventy female athymic nude mice were intraperitoneally inoculated with tumor cells 17 days prior to injection of single 227Th-trastuzumab doses of 1000 kBq/kg, 600 kBq/kg or 400 kBq/kg, or three injections with 400 kBq/kg 227Th-trastuzumab separated by 4 weeks. Two control groups were given either 20 µg unlabeled trastuzumab or 0.9 % NaCl. In vivo bioluminescence imaging was performed weekly before and after onset of therapy. Tumor growth, survival and toxicity were compared. Results: There was a statistically significant therapeutic effect of the 227Th-trastuzumab treatment both with respect to survival and tumor growth. The maximum tolerated dosage was 600 kBq/kg 227Th-trastuzumab. In the in vitro study, two hours incubation with 20 kBq/ml of 227Th-trastuzumab, followed by washing, and subsequent culture of the cells resulted in an average absorbed radiation dose of 6 Gy after 11 days and complete growth inhibition. Conclusion: Targeted alpha therapy with 227Th-trastuzumab of human SKOV3-luc-D3 cells growing intraperitoneally in nude mice was clearly superior to unlabeled trastuzumab therapy. The results warrant further studies of 227Thradioimmunotherapy used as adjuvant treatment and for metastatic cancer. Keywords: Radioimmunotherapy, targeted alpha therapy, Thorium-227, trastuzumab, bioluminescence, alpha particle, ovarian cancer." @default.
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- W2149013235 date "2013-06-01" @default.
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- W2149013235 title "Targeted Alpha Therapy with 227Th-trastuzumab of Intraperitoneal Ovarian Cancer in Nude Mice" @default.
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- W2149013235 doi "https://doi.org/10.2174/18744710113069990018" @default.
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