Abstract
Two 99mTc cores, 99mTc tricarbonyl and 99mTc-Sn(II), are compared in labeling of Lansoprazole (Lans). The optimum conditions of Lansoprazole labeling with 99mTc in the presence of SnCl2·2H2O as a reducing agent are as follows: pH 8, 100 μg of SnCl2·2H2O, room temperature, 2 mg of lansoprazole, and 30 min; the maximum radiochemical yield was 98 ± 0.22%. The obtained 99mTc Lansoprazole complex was stable in serum for up to 16 h. The optimum conditions of Lansoprazole binding with the 99mTc tricarbonyl ([99mTc(CO)3(H2O)3]+) core are as follows: pH 8, 2 mg of Lansoprazole, 100°С, 30 min. The complex was stable in serum for up to 12 h. Biodistribution study of the first core on two different groups of mice (control group and ulcer-bearing group) showed comparatively high uptake in the ulcer group of mice, 77.8 ± 1.1% ID/g at 30 min post-injection (higher than for the control group); at 24 h, the uptake decreased to 17.9% ID/g. Similar results were obtained with 99mTc tricarbonyl Lansoprazole: 78.5% ID/g at 30 min post-injection and 24.6% at 24 h. Thus, both complexes are suitable as radiotracers for stomach ulcer imaging.
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ACKNOWLEDGMENTS
I would like to extend my sincere thanks and gratitude to everyone who gave me even a small contribution to accomplish this fruitful work, starting with the authors participating in the this work, as well as my professors, colleagues and students. I would also like to thank my family who created the right conditions for me to do this work, my father, mother, wives, brothers as well as all my children: Mohammed, Menna, Abd-Allah, Hamdi, Mostafa and Maryam Sanad. In addition, this work was supported by STDF–National Research Centre under project number 41535.
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Sanad, M.H., Eyssa, H.M., Marzook, F.A. et al. Comparative Bioevaluation of 99mTc Tricarbonyl and 99mTc-Sn(II) Lansoprazole as a Model for Peptic Ulcer Localization. Radiochemistry 63, 642–650 (2021). https://doi.org/10.1134/S1066362221050131
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DOI: https://doi.org/10.1134/S1066362221050131