Abstract
Yttrium-90-(90Y) labeled monoclonal antibodies prepared with a chelating agent, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), have been used for radioimmunotherapy of cancer. In the present work, the Fab fragment of anti-EGFR monoclonal antibody nimotuzumab was prepared with high purity, integrity and biological activity. The Fab fragment with high specific recognition of EGFR in NCI-H125 human lung adenocarcinoma cells was derivatized with DOTA-NHS applying a simple procedure. DOTA-nimotuzumab Fab fragment was successfully radiolabeled with 90Y with high radiochemical yield. The in vitro stability of labeled product was optimal over 24 h in buffered solution at 37 °C. Biodistribution and pharmacokinetic studies correctly evaluated the in vivo non-tumor uptake, dosage regimen and excretion pathway in normal Wistar rats.
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Acknowledgments
The authors would like to thank the Center of Molecular Immunology for their kind support. Funding of this work was partially provided by the International Atomic Energy Agency through the co-ordinated research project on “Development of Generator Technologies for Therapeutic Radionuclides: 90Y and 188Re”.
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Alonso Martínez, L.M., Xiques Castillo, A., Calzada Falcón, V.N. et al. Development of 90Y-DOTA-nimotuzumab Fab fragment for radioimmunotherapy. J Radioanal Nucl Chem 302, 49–56 (2014). https://doi.org/10.1007/s10967-014-3402-9
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DOI: https://doi.org/10.1007/s10967-014-3402-9