The Janssen Pharmaceutical Companies of Johnson & Johnson announced today that regulatory submissions based on the Phase 3 ACIS study, which evaluated the combination of ERLEADA® (apalutamide) and ZYTIGA® (abiraterone acetate) plus prednisone in patients with chemotherapy-naïve metastatic castration resistant prostate cancer (mCRPC), will not be pursued. As presented at the American Society of Clinical Oncology’s Genitourinary (ASCO GU) Cancers Symposium in February 2021, the ACIS study met its primary endpoint of radiographic progression-free survival (rPFS); however, combination treatment did not show significant benefit over the active control ZYTIGA® plus prednisone in key secondary endpoints, including overall survival (OS).
“Safety results from ACIS were consistent with prior studies of ERLEADA and ZYTIGA plus prednisone, with no new safety signals observed. The study also generated valuable scientific outcomes and insights in subgroups of patients with luminal type in PAM50 test and tumors with average or high androgen receptor activity (molecular signatures of hormone sensitivity), which warrant further investigation,” said Kiran Patel, M.D., Vice President, Clinical Development, Solid Tumors, Janssen Research & Development, LLC. “These data will be important in informing future programs in our pipeline, as we look to build upon our leadership and commitment in bringing transformational therapies to patients diagnosed with prostate cancer.”