Plenary Presentation at EORTC-NCI-AACR 32nd Symposium on Molecular Targets and Cancer Therapeutics Describes Encouraging Tolerability and Exposure Profiles for RMC-4630 Combined with Cobimetinib and Early Evidence of Clinical Activity in RASmut Colorectal Cancers

Company Also Announces New Clinical Collaboration with AstraZeneca to Study RMC-4630 in Combination with an Emerging AstraZeneca Asset Targeting KRASG12C

REDWOOD CITY, CA, USA I October 24, 2020 I Revolution Medicines, Inc. (Nasdaq: RVMD), a clinical-stage precision oncology company developing targeted therapies to inhibit frontier targets in RAS-addicted cancers, today reported interim data from the company’s ongoing Phase 1b/2 clinical trial (RMC-4630-02) evaluating the combination of RMC-4630 and cobimetinib (Cotellic®) in an oral presentation by Johanna C. Bendell, M.D., Sarah Cannon Research Institute, Nashville, TN in a plenary session at the EORTC-NCI-AACR 32nd Symposium on Molecular Targets and Cancer Therapeutics (ENA 2020). Interim results suggest that a dual intermittent dosing strategy for RMC-4630 and cobimetinib exceeds target plasma exposures for each drug based on preclinical models of RAS pathway-driven cancers that project potential clinical activity. The adverse event profile of the combination, which was consistent with expected on-pathway effects of both drugs, was tolerable under the dual intermittent dosing schedule.

The ongoing Phase 1b/2 RMC-4630-02 trial includes an open-label, dose-escalation and dose-expansion study arm designed to evaluate the safety, tolerability, pharmacokinetic, and pharmacodynamic profiles of RMC-4630 and cobimetinib in adult patients with relapsed/refractory solid tumors that harbor specific genomic RAS pathway mutations. The results of this study will inform Revolution Medicines’ pending selection of a recommended Phase 2 dose and schedule for the drug combination to be evaluated further in one or more expansion cohorts of patients selected by tumor genotype and histotype that are expected to initiate in 2020.

While evaluation of efficacy outcomes is not a primary objective of the dose escalation portion of the RMC-4630-02 study, investigators reported preliminary evidence of anti-tumor activity in patients with colorectal cancer driven by KRAS mutations. As of the data cut-off date, tumor volume reduction was observed in three of seven patients with colorectal cancers harboring KRAS mutations who were treated at the highest dose of RMC-4630, including one unconfirmed partial response in a patient carrying a KRASG12D mutation.

Expansion of Combination Program

Revolution Medicines also announced that it has signed an agreement with AstraZeneca (LSE/STO/Nasdaq: AZN) to enter a clinical collaboration to study RMC-4630 in combination with an emerging asset from AstraZeneca’s preclinical efforts targeting KRASG12C. Under the agreement, AstraZeneca will sponsor and conduct this combination study and Revolution Medicines will provide clinical supply of RMC-4630.

Separately, Revolution Medicines and Amgen are collaborators in an ongoing Amgen-sponsored clinical trial studying RMC-4630 in combination with AMG 510 (soratinib), an investigational KRASG12C(OFF) inhibitor.

“Drug combinations are likely to be critical for defeating inherent drug resistance mechanisms exploited by RAS-addicted cancers, and both the data presented at ENA 2020 and the new clinical collaboration announced today represent important steps forward in developing RMC-4630 as a backbone of such combination therapies. The ENA presentation focuses on cancers with RAS mutations lacking a mutant-selective inhibitor, and suggest that RMC-4630 and cobimetinib can be combined through an innovative dual intermittent dosing schedule to drive anti-tumor activity in advanced colorectal cancers,” said Mark A. Goldsmith, M.D., Ph.D., chief executive officer and chairman of Revolution Medicines. “We are currently refining a recommended Phase 2 dose and schedule to evaluate further for safety, tolerability and anti-tumor activity in dedicated expansion patient cohort(s).”

“We are also excited to collaborate with AstraZeneca to study RMC-4630 in combination with an emerging asset from AstraZeneca’s pipeline targeting KRASG12C(OFF) for tumors carrying a KRASG12C mutation, a planned study that represents an expansion of our commitment to RMC-4630 as a backbone for combinations with RAS-mutant inhibitors. We also continue growing our exciting pipeline of direct inhibitors of oncogenic RAS(ON) variants, including our direct inhibitors of KRASG12C(ON) and KRASG12D(ON) currently in lead optimization.”

RMC-4630 and cobimetinib are targeted inhibitors of oncogenic proteins at distinct positions within the RAS signaling cascade that is frequently exploited by human cancers and may develop adaptive resistance to single agent treatment. RMC-4630 is a potent and orally bioavailable small molecule designed to selectively inhibit the activity of SHP2, an upstream cellular protein that plays a key role in modulating cell growth by transmitting signals from receptor tyrosine kinases to RAS. Cobimetinib, marketed in the U.S. by Genentech, a member of the Roche group, inhibits the activity of MEK, a downstream effector of RAS that affects cell survival and growth. Cobimetinib is approved in the U.S. for the treatment of patients with BRAFV600E or BRAFV600K mutation-positive unresectable or metastatic melanoma in combination with vemurafenib (Zelboraf®). Cobimetinib is provided by Genentech for the RMC-4630-02 study under a clinical collaboration agreement with Revolution Medicines.   

About RMC-4630

RMC-4630 is currently being evaluated in a Phase 1 monotherapy clinical trial (RMC-4630-01) for a range of tumor types featuring specific, molecularly-defined oncogenic mutations, a Phase 1b/2 trial (RMC-4630-02) in combination with cobimetinib in patients with relapsed/refractory solid tumors displaying specific genomic mutations, a Phase 1b study (CodeBreaK 101) in combination with AMG 510 in patients with advanced solid tumors harboring the KRASG12C mutation, and a Phase 1 study in combination with pembrozilumab in patients with advanced malignancies.

The SHP2 inhibitor program, including RMC-4630, is the focus of an exclusive global research, development and commercialization agreement with Sanofi.

About Revolution Medicines, Inc.

Revolution Medicines is a clinical-stage precision oncology company developing novel targeted therapies to inhibit high-value frontier targets in RAS-addicted cancers. The company possesses sophisticated structure-based drug discovery capabilities built upon deep chemical biology and cancer pharmacology know-how and innovative, proprietary technologies that enable the creation of small molecules tailored to unconventional binding sites.

The company’s R&D pipeline comprises RAS(ON) Inhibitors designed to suppress various oncogenic variants of RAS proteins, and RAS Companion Inhibitors for use in combination treatment strategies. RAS(ON) Inhibitors include compounds targeting KRASG12C(ON), KRASG12D(ON) and other RAS variants. RAS Companion Inhibitors include RMC-4630 targeting SHP2, RMC-5552 targeting mTORC1, and inhibitors of SOS1.

SOURCE: Revolution Medicines