Measuring glucocorticoid receptor expression in vivo with PET.

ABSTRACT: The glucocorticoid receptor (GR) is an emerging drug target for several common and deadly solid tumors like breast and prostate cancer, and clinical trials studying the antitumor effects of GR antagonists are beginning. Since GR expression can be variable in tumor cells, and virtually all normal mammalian tissues express some GR, we hypothesized that an imaging tool capable of detecting GR positive tumors and/or measuring GR occupancy by drug in tumor and normal tissues could improve the precision application of anti-GR therapies in the clinic. To this end, we developed a fluorine-18 labeled corticosteroid termed GR02 that potently binds the endogenous ligand binding pocket on full length GR. Binding of ¹⁸F-GR02 was suppressed in many normal tissues by co-treatment with mifepris

SUBMITTER: Truillet C 

PROVIDER: S-EPMC5945515 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature