Macrocyclic chelators (I) for chelation of alpha-emitting radiometal ions, such as actinium-225 are provided. Also provided are radiometal complexes containing an alpha-emitting radiometal ion bound to the macrocyclic chelator via coordinate bonding, and radioimmunoconjugates containing the radiometal complexes covalently linked to a targeting ligand, such as an antibody or antigen binding fragment thereof. The radioimmunoconjugates can be produced by click chemistry reactions. Methods of using the radiocomplexes and radioimmunoconjugates for selectively targeting neoplastic cells for radiotherapy and for treating neoplastic diseases and disorders are also described.
提供了用于螯合α放射性
金属离子(如
锕-225)的大环
螯合剂(I)。还提供了包含α放射性
金属离子与大环
螯合剂通过配位键结合的放射
金属配合物,以及包含放射
金属配合物共价连接到靶向
配体(如
抗体或其抗原结合片段)的放射免疫结合物。这些放射免疫结合物可以通过点击
化学反应制备。还描述了利用这些放射
金属配合物和放射免疫结合物用于选择性靶向肿瘤细胞进行放射治疗以及治疗肿瘤疾病和疾病的方法。