A Phase 1 First-in-Human Study Evaluating Safety, Pharmacokinetics, and Efficacy of ABBV-969 in Adult Subjects With Metastatic Castration-Resistant Prostate Cancer

The purpose of this study is to see if the study drug is safe and tolerable.
This study will consist of 2 main phases: dose escalation (Part 1) and dose expansion (Part 2). In Part 1, multiple different (increasing) doses and intervals of ABBV-969 will be tested. In Part 2, a single ABBV-969 dose level selected from Part 1 will be evaluated in a larger number of subjects.