Revolution Medicines Announces Dosing of First Patient in Phase 1/1b Clinical Study of RMC-5552 in Patients with Advanced Solid Tumors

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REDWOOD CITY, Calif., April 21, 2021 (GLOBE NEWSWIRE) — Revolution Medicines, Inc. (Nasdaq: RVMD), a clinical-stage precision oncology company focused on developing targeted therapies to inhibit frontier targets in RAS-addicted cancers, today announced dosing of the first patient in a multicenter Phase 1/1b clinical trial evaluating RMC-5552, the company’s investigational first-in-class bi-steric mTORC1 inhibitor as a monotherapy. The trial is an open-label dose-escalation and dose-expansion study designed to evaluate the safety, tolerability, preliminary efficacy and pharmacokinetics of RMC-5552 in patients with advanced relapsed/refractory solid tumors. Results from this study will inform Revolution Medicines’ identification of the maximum tolerated dose (MTD) and selection of recommended Phase 2 dose and schedule (RP2DS) for further evaluation of the compound.

RMC-5552 is a potent and selective inhibitor of mTORC1 that is being developed as an anticancer therapeutic for patients with solid tumors that have hyperactivation of the mTOR pathway, including certain RAS-addicted cancers. The compound is designed to inhibit mTORC1 and preserve the natural tumor suppressive activity of 4EBP1, without the undesired inhibition of mTORC2. RMC-5552 has demonstrated antitumor activity in a wide variety of preclinical models. Revolution Medicines has also reported in vivo data demonstrating that RMC-5552 may increase antitumor activity in combination with KRAS^G12C inhibitors in lung and colon cancers harboring KRAS mutations and co-mutations in the mTOR signaling pathway that can cause resistance to single agent RAS inhibition.

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