A Phase 1a/1b, First-Time-in-Human Study of CT-202, a Nectin-4 Directed Bispecific Antibody, in Participants With Recurring Triple Negative Breast, Colorectal, Urothelial Cancers

This is a Phase 1a/1b, first time in human (FTIH), open-label, dose escalation and expansion study to evaluate the safety, tolerability, and preliminary efficacy of CT-202 (study drug), a humanized T cell engaging bispecific antibody targeting nectin-4, in participants with nectin-4 expressing recurrent, unresectable or metastatic refractory/resistant TNBC, CRC, or UC. Results of the study including PK, PD, efficacy, and safety will be used in the RP2D determination.

Inclusion Criteria: * Participants with nectin-4-positive triple negative breast cancer, colorectal cancer, or urothelial cancer that have received standard therapies * Participants with measurable disease per RECIST 1.1 * ECOG 0, 1, or 2 and life expectancy of ≥ 12 weeks * Participants have adequate organ function. Exclusion Criteria: * History of severe skin toxicity * Uncontrolled significant active infection or any medical or other condition that in the opinion of the Investigator would preclude the participant's participation in the study. * Concurrent participation in another investigational clinical trial.