ARX517, Ambrx's Proprietary Anti-PSMA ADC, Shows Encouraging Single-Agent Safety and Efficacy Data in Patients with Advanced Prostate Cancer

Feb 16, 2023

Ambrx Biopharma Inc., or Ambrx, (NYSE: AMAM) today announced encouraging initial data from its ongoing Phase 1 trial (APEX-01 (NCT04662580)) investigating ARX517, Ambrx’s proprietary anti-PSMA ADC, in prostate cancer patients. APEX-01 is a Phase 1, first-in-human, open label dose escalation and dose expansion trial enrolling patients with advanced prostate cancer whose tumors have progressed on at least two prior FDA-approved treatments. APEX-01 is the only ongoing clinical trial in the United States targeting PSMA with an ADC. APEX-01 opened for enrollment July 2021 and this is the first data being reported in the study.

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