Synthesis of <sup>177</sup>Lu-Labeled, Somatostatin-2 Receptor-Targeted Metalla-Assemblies: Challenges in the Design of Supramolecular Radiotherapeutics
作者:Sandra Deiser、Marike Drexler、Guillermo Moreno-Alcántar、Maximilian Irl、Claudia Schmidt、Thomas Günther、Angela Casini
DOI:10.1021/acs.inorgchem.3c02090
日期:2023.12.18
Self-assembled supramolecular coordination complexes (SCCs) hold promise for biomedical applications in cancer therapy, although their potential in the field of nuclear medicine is still substantially unexplored. Therefore, in this study an exo-functionalized cationic [Pd2L2]4+ metallacycle (L = 3,5-bis(3-ethynylpyridine)phenyl), targeted to the somatostatin-2 receptor (sst2R) and featuring the DOTA
自组装超分子配位复合物(SCC)在癌症治疗的生物医学应用中具有广阔的前景,尽管它们在核医学领域的潜力尚未得到充分开发。因此,在本研究中,外型功能化的阳离子 [Pd 2 L 2 ] 4+金属环(L = 3,5-双(3-乙炔基吡啶)苯基)靶向生长抑素-2 受体 (sst2R),并具有 DOTA 螯合剂(1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸)为了结合β-和γ-发射体镥-177,通过标准固体配体合成后通过自组装合成-相肽合成(SPPS)。然后通过反相高效液相色谱 (RP-HPLC)、电喷雾电离质谱 (ESI-MS) 以及1 H 和1 H-DOSY NMR(DOSY = 扩散有序光谱)对该金属环进行表征。还优化了用177 Lu 放射性标记金属环的程序。评估了所得的[ nat/177 Lu]Lu-DOTA-金属环,称为[ nat/177 Lu]Luc- Cy ,其稳定性和体外特性。与参考[