申请人:Kurzrock Razelle
公开号:US20100104511A1
公开(公告)日:2010-04-29
Disclosed are pharmaceutical compositions that include a chelator and an antibody directed against a phosphorylation site of a protein, wherein the antibody is conjugated to the chelator to form a chelator-antibody conjugate. For example, the antibody may recognize a phosphorylated tyrosine residue or a phosphorylated serine residue of a cell surface receptor. Also disclosed are methods of synthesizing a radiolabeled chelator-antibody conjugate, wherein the antibody is directed against a phosphorylation site of a protein. Also disclosed are methods for imaging a site in a subject that involve administering to the subject an effective amount of a composition that includes a valent metal ion-labeled chelator-antibody conjugate, wherein the antibody is an antibody directed against a phosphorylation site of a protein, and detecting a radioactive signal from the site in the subject following administration of an effective amount of the composition. The method of imaging can be applied in diagnosing a tumor, such as a tumor that can be responsive to therapy using a tyrosine kinase inhibitor, and in the treatment of a tumor, such as by targeting therapy to cell surface receptors that include phosphorylation sites.