To Determine Safe and Effective Dose of Sotatercept for the Treatment of Chemotherapy Induced Anemia in Participants With Advanced Non-small Cell Lung Cancer

The purpose of this study was to determine an effective and safe dose of sotatercept (ACE-011) for the treatment of chemotherapy-induced anemia (CIA) in participants with metastatic non-small cell lung cancer (NSCLC) who are being treated with first-line platinum based chemotherapy.

The ACE-011-NSCL-001 Phase 2a study was an open-label, randomized, dose-ranging study designed to assess the efficacy, safety, tolerability, pharmacokinetic and quality of life of sotatercept for treatment of CIA in participants with advanced or metastatic solid tumors treated with platinum-based chemotherapeutic regimens. Other objectives included the effect of sotatercept treatment on bone metabolism, the evaluation of the expression of Activin A and other proteins/biomarkers (including myostatin and follistatin) and the assessment of renal function biomarkers. The study consisted of a Screening Period, a Treatment Period of approximately 6 months (up to 4 doses of sotatercept at either 15 mg or 30 mg administered subcutaneously every 42 days) and a Post-treatment Follow-up Period or End of Treatment (42 days after the last dose of sotatercept). The study was terminated early due to a slower than expected rate of enrollment as a result of substantial changes in the standard of care for cancer participants with anemia which resulted in challenges to timely accrual and completion of the study. Therefore, 26 participants were randomized into the study and the planned Part 2 of the study consisting of a double-blind, randomized, placebo-controlled Phase 2b/3 study conducted at the optimal dose of sotatercept in up to 750 participants with metastatic NSCLC was not performed. Due to the small sample size and variability of the data, changes were made to modify the study endpoints and revise them to be exploratory only.