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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

In vivo studies of pharmacokinetics and efficacy of Bismuth-213 labeled antimelanoma monoclonal antibody 9.2.27.

OBJECTIVES: Key objectives of the study were to determine the pharmacokinetics and efficacy of the alpha emitting Bismuth-213 labeled 9.2.27 alpha-immunoconjugate (AIC). METHODS: Balb/c nude mice were injected with varying doses of AIC to determine the pharmacokinetics of the AIC. The results were normalized to percent counts per minute (CPM) per gram per 3.7 MBq of the AIC (%CPM/g/3.7MBq) for each organ. Efficacy was determined by injected varying doses of AIC to different stages of tumor growth for intra-lesional, systemic and multiple dose TAT. RESULTS: Biodistribution studies showed similar pharmacokinetics for blood and brain, liver, kidneys, spleen, gut, heart, lungs and bone marrow, indicating that there was no retention of AIC. This is particularly important for brain (due to the presence of NG2+ cells) as the antibody 9.2.27 may reach NG2 positive cells. Tumor growth at 2-days post-inoculation was completely inhibited by TAT. The response to TAT was inversely proportional to tumor growth, i.e., a reduction in response was observed with increased tumor burden. A multiple dose regime was found to be more effective than single dose. CONCLUSIONS: TAT is effective for the treatment of micrometastatic melanoma, when the tumor is preangiogenic in the form of isolated cells or cell clusters. There is no evidence of retention of AIC in brain, kidneys and other vital organs.[1]


  1. In vivo studies of pharmacokinetics and efficacy of Bismuth-213 labeled antimelanoma monoclonal antibody 9.2.27. Rizvi, S.M., Qu, C.F., Song, Y.J., Raja, C., Allen, B.J. Cancer Biol. Ther. (2005) [Pubmed]
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