Neon Therapeutics, Inc. announced top-line results, with at least 12-month median follow-up, from the ongoing, multicenter Phase 1b clinical trial evaluating NEO-PV-01, Neon’s personal neoantigen vaccine candidate, in combination with OPDIVO in patients with advanced or metastatic melanoma, smoking-associated non-small cell lung cancer (NSCLC) and bladder cancer. Across all three distinct tumor types, results demonstrated prolonged and consistent improvements in progression-free survival (PFS) that compare favorably to that observed with checkpoint inhibitor monotherapy, based on historical benchmark data. At 13.4-month median follow-up in 34 patients with metastatic melanoma, median PFS had not yet been reached. In 27 patients with metastatic NSCLC, median PFS was 5.6 months; and in 21 patients with metastatic bladder cancer, median PFS was 5.6 months. These top-line data, which come from 82 patients who received at least one dose of OPDIVO in the Phase 1b NT-001 trial (Intention-to-Treat analysis, or ITT), support further development of NEO-PV-01, including randomized Phase 2 trials of NEO-PV-01 in metastatic disease settings. The NT-001 trial was initiated in November 2016 and completed enrollment in July 2018.