Medicine and Health Sciences Commons^™

Leveraging Pet To Image Folate Receptor Α Therapy Of An Antibody-Drug Conjugate, Christian Brand, Ahmad Sadique, Jacob L. Houghton, Kishore Gangagari, Jose F. Ponte, Jason S. Lewis, Naga Vara Kishore Pillarsetty, Joseph A. Konner, Thomas Reiner

Publications and Research

Background: The folate receptor α (FRα)-targeting antibody-drug conjugate (ADC), IMGN853, shows great antitumor activity against FRα-expressing tumors in vivo, but patient selection and consequently therapy outcome are based on immunohistochemistry. The aim of this study is to develop an antibody-derived immuno-PET imaging agent strategy for targeting FRα in ovarian cancer as a predictor of treatment success. Methods: We developed [89Zr]Zr-DFO-M9346A, a humanized antibody-based radiotracer targeting tumorassociated FRα in the preclinical setting. [89Zr]Zr-DFO-M9346A’s binding ability was tested in an in vitro uptake assay using cell lines with varying FRα expression levels. The diagnostic potential of [89Zr]Zr-M9346A was evaluated in KB and …