Abstract
This article describes the preparation, quality control, and biological evaluation of 90Y-skin patches based on Nafion® membrane as a viable treatment modality for superficial skin tumors such as melanoma. To arrive at the conditions for optimum uptake of 90Y on the membrane, influence of various experimental parameters, such as pH of the feed solution, inactive yttrium carrier concentration, reaction volume, contact time, and temperature, was systematically investigated. Under the optimized conditions, >95% of the 90Y activity (37–185 MBq) could be incorporated in the Nafion membranes to prepare 90Y-skin patches. Quality control tests were carried out to ensure nonleachability, uniform distribution of activity, and stability of the 90Y-patches. Mice bearing transplanted melanoma tumors that were treated with two doses of 74 MBq 90Y-Nafion membrane sources showed complete tumor regression. Histopathological examination of the treated area showed absence of tumor. The results of the study indicate the potential of 90Y-Nafion membrane sources for treatment of superficial skin tumors.
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