Imfinzi Phase 3 Trial Fails
AstraZeneca says the Phase 3 PACIFIC-2 trial of its Imfinzi (durvalumab) concurrently administered with chemoradiotherapy (CRT) did not achieve statistical significance for the primary endpoint of progression-free survival versus chemoradiotherapy alone to treat patients with unresectable, Stage 3 non-small cell lung cancer. A company statement says that Imfinzi sequentially administered after platinum-based CRT is the established global standard of care for treating unresectable, Stage 3 non-small cell lung cancer based on the results of the PACIFIC Phase 3 trial. The PACIFIC-2 trial was initiated to evaluate concurrent Imfinzi administration with CRT, to address patients who progress or discontinue treatment during CRT and are therefore ineligible for the PACIFIC regimen.
Imfinzi is described as a human monoclonal antibody that binds to the PD-L1 protein and blocks its interaction with the PD-1 and CD80 proteins, countering the tumor’s immune-evading tactics and releasing the inhibition of immune responses. It is approved for several lung cancer indications, biliary tract cancer, hepatocellular carcinoma, and advanced bladder cancer.