Novel compositions for imaging that include (a) a polypeptide that includes two or more consecutive amino acids that will function to non-covalently bind valent metal ions and (2) a valent metal ion chelated to at least one of the two consecutive amino acids, are disclosed. Also disclosed are methods of imaging using these novel compositions, such as methods of imaging a tumor within a subject. Methods of synthesizing an imaging agent and kits for preparing an imaging agent are also disclosed. Methods for determining the effectiveness of a candidate substance as an imaging agent that involve conjugating or chelating the candidate substance with a polypeptide that includes two or more consecutive amino acids that will function to non-covalently bind valent metal ions.
揭示了用于成像的新颖组合物,包括(a)包含两个或更多连续
氨基酸的
多肽,这些
氨基酸将起到非共价结合价态
金属离子的作用,以及(2)与这两个连续
氨基酸中的至少一个螯合的价态
金属离子。还公开了使用这些新颖组合物进行成像的方法,例如成像主体内的肿瘤的成像方法。还公开了合成成像剂的方法和用于制备成像剂的试剂盒。还公开了用于确定候选物质作为成像剂有效性的方法,该方法涉及将候选物质与包含两个或更多连续
氨基酸的
多肽结合或螯合,这些
氨基酸将起到非共价结合价态
金属离子的作用。