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Strickler, John H; Satake, Hironaga; George, Thomas J; Yaeger, Rona; Hollebecque, Antoine; Garrido-Laguna, Ignacio; Schuler, Martin; Burns, Timothy F; Coveler, Andrew L; Falchook, Gerald S; Vincent, Mark; Sunakawa, Yu; Dahan, Laetitia; Bajor, David; Rha, Sun-Young; Lemech, Charlotte; Juric, Dejan; Rehn, Marko; Ngarmchamnanrith, Gataree; Jafarinasabian, Pegah; Tran, Qui; Hong, David S
The New England journal of medicine, 01/2023, Volume: 388, Issue: 1Journal Article
p.G12C mutation occurs in approximately 1 to 2% of pancreatic cancers. The safety and efficacy of sotorasib, a KRAS G12C inhibitor, in previously treated patients with p.G12C-mutated pancreatic cancer are unknown. We conducted a single-group, phase 1-2 trial to assess the safety and efficacy of sotorasib treatment in patients with p.G12C-mutated pancreatic cancer who had received at least one previous systemic therapy. The primary objective of phase 1 was to assess safety and to identify the recommended dose for phase 2. In phase 2, patients received sotorasib at a dose of 960 mg orally once daily. The primary end point for phase 2 was a centrally confirmed objective response (defined as a complete or partial response). Efficacy end points were assessed in the pooled population from both phases and included objective response, duration of response, time to objective response, disease control (defined as an objective response or stable disease), progression-free survival, and overall survival. Safety was also assessed. The pooled population from phases 1 and 2 consisted of 38 patients, all of whom had metastatic disease at enrollment and had previously received chemotherapy. At baseline, patients had received a median of 2 lines (range, 1 to 8) of therapy previously. All 38 patients received sotorasib in the trial. A total of 8 patients had a centrally confirmed objective response (21%; 95% confidence interval CI, 10 to 37). The median progression-free survival was 4.0 months (95% CI, 2.8 to 5.6), and the median overall survival was 6.9 months (95% CI, 5.0 to 9.1). Treatment-related adverse events of any grade were reported in 16 patients (42%); 6 patients (16%) had grade 3 adverse events. No treatment-related adverse events were fatal or led to treatment discontinuation. Sotorasib showed anticancer activity and had an acceptable safety profile in patients with p.G12C-mutated advanced pancreatic cancer who had received previous treatment. (Funded by Amgen and others; CodeBreaK 100 ClinicalTrials.gov number, NCT03600883.).
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