Abstract
2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine (OEP) was successfully radiolabeled with technetium-99m by direct technique using two different reducing agents: stannous chloride and sodium borohydride. High radiochemical yield (97%) and in vitro stability for up to 8 h were obtained using sodium borohydride. Paper chromatography (PC), paper electrophoresis, and high-performance liquid chromatography (HPLC) were used to evaluate the radiochemical yield and identify the purity of the final product. Biodistribution studies of the 99mTc-OEP complex (prepared using sodium borohydride) in tumor-bearing mice showed high target/nontarget (T, right thigh/NT, left thigh) ratio of 4.40 ± 0.12 at 60 min post injection, suggesting that this complex can be used as a solid tumor imaging agent.
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ACKNOWLEDGMENTS
This work was supported by STDF – National Research Centre under project number 41535 – PI Ahmed Sayed Morsy Fouzy.
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Sanad, M.H., Gizawy, M.A., Motaleb, M.A. et al. A Comparative Study of Stannous Chloride and Sodium Borohydride as Reducing Agents for the Radiolabeling of 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-Porphine with Technetium-99m for Tumor Imaging. Radiochemistry 63, 512–519 (2021). https://doi.org/10.1134/S1066362221040159
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DOI: https://doi.org/10.1134/S1066362221040159