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Revolution Medicines, Inc. (NASDAQ:RVMD), a late-stage clinical oncology company developing targeted therapies for patients with RAS-addicted cancers, today announced updated clinical data for elironrasib, a RAS(ON) G12C-selective inhibitor, in previously treated patients with KRAS G12C non-small cell lung cancer (NSCLC) who had received a prior KRAS(OFF) G12C inhibitor. These results will be highlighted in an oral presentation at the AACR-NCI-EORTC Symposium on Molecular Targets and Cancer Therapeutics in Boston, October 23-25.
As of the August 4, 2025 data cutoff date, patients with KRAS G12C NSCLC, who had received prior therapy with a KRAS(OFF) G12C inhibitor, were treated with elironrasib at the recommended Phase 2 dose of 200 mg orally twice daily (BID) and were evaluated on key safety and antitumor activity endpoints. These patients (n=24) were heavily pretreated, with a median of three prior lines of therapy (range 2-6), with 92% (22 out of 24 patients) having progressed on a prior KRAS(OFF) G12C inhibitor. Elironrasib demonstrated compelling antitumor activity, with a confirmed objective response rate of 42% (95% CI: 22-63) and a disease control rate of 79% (95% CI: 58-93). The median duration of response was 11.2 months (95% CI: 5.9-not estimable), and the median progression-free survival was 6.2 months (95% CI: 4.0-10.3). The median overall survival (OS) was not yet reached and 12-month OS rate was 62% (95% CI: 40-78).
These results are from RMC-6291-001, an ongoing multicenter, Phase 1 trial designed to evaluate elironrasib (RMC‑6291) monotherapy in patients with advanced KRAS G12C solid tumors.
Elironrasib is an innovative, mutant-selective inhibitor that binds selectively and covalently to the oncogenic RAS(ON) form of the RAS G12C variant that drives approximately 12% of cases of NSCLC. Revolution Medicines is exploring elironrasib monotherapy and combinations in various treatment settings and continues work to prioritize among multiple options for advancing its development. In July 2025, elironrasib was granted Breakthrough Therapy Designation for the treatment of adult patients with KRAS G12C-mutated locally advanced or metastatic NSCLC who have received prior chemotherapy and immunotherapy but have not been previously treated with a KRAS G12C inhibitor.
NSCLC accounts for 80%-85% of all lung cancers, and most patients have advanced or metastatic disease at initial diagnosis.1,2 KRAS mutations are found in nearly 30% of NSCLC cases, among which KRAS G12C is the most common.
Posted In: RVMD
