Aprea Therapeutics Highlights Positive Emerging Clinical Activity for WEE1 Inhibitor, APR-1051, with a Confirmed Partial Response in the Ongoing Phase 1 ACESOT-1051 Trial

Confirmed partial response at 220 mg indicates anti-tumor activity of APR-1051 in biomarker-defined cancers Early clinical data suggest the potential of APR-1051 as a best-in-class WEE1 inhibitor Emerging clinical proof of concept responses without class-limiting toxicity to date support Aprea's development strategy of differentiated WEE1 inhibition with an improved therapeutic index A further update from the trial is expected in the second quarter of 2026 DOYLESTOWN, Pa., March 30, 2026 (GLOBE NEWSWIRE) -- Aprea Therapeutics, Inc. (Nasdaq: APRE) (“Aprea”, or the “Company”), a clinical-stage precision medicine oncology company focused on the discovery and development of targeted therapies for patients with biomarker-defined cancers, today announced the confirmation of a partial response (PR) in its ongoing ACESOT-1051 trial evaluating APR-1051, a potent and selective WEE1 kinase inhibitor.