IDEAYA Biosciences Announces IDE892, a Potential Best-in-Class MTA-Cooperative PRMT5 Inhibitor, Initiates a Phase 1/2 Clinical Combination Study in MTAP-Deleted Pancreatic and Lung Cancers
PR Newswire
SOUTH SAN FRANCISCO, Calif., June 15, 2026
IDE892 is a potential best-in-class MTA-Cooperative PRMT5 combination partner with MAT2A and pan-RAS inhibitors, with favorable drug-like propertiesIDE892 has a CYP3A4 IC50 greater than 45 micromolar, and did not show time dependent inhibition of any of the 7 major cytochrome P450s (CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP3A4) based on full kinetic CYP inactivation assaysIDE892 monotherapy Phase 1 escalation has cleared multiple dose cohorts with maximally efficacious target exposures anticipated at a favorable pill size and the MTD has not yet been reached. IDE892 monotherapy expansion is anticipated in Q3 2026MTAP-deletion is estimated to occur in up to 40% of pancreatic cancer and ~15% of non-small cell lung cancer (NSCLC)SOUTH SAN FRANCISCO, Calif., June 15, 2026 /PRNewswire/ -- IDEAYA Biosciences, Inc. (NASDAQ: IDYA), a leading precision medicine oncology company, today announced that the first patient has been enrolled in its Phase 1 clinical trial evaluating IDE892, a potential best-in-class methylthioadenosine (MTA)-cooperative inhibitor of PRMT5, in combination with IDE397, a potential first-in-class and best-in-class inhibitor of MAT2A, in MTAP-deleted solid tumors, with a focus on NSCLC and pancreatic cancer. In preclinical studies, dual inhibition of PRMT5 and MAT2A with the combination of IDE892 and IDE397 resulted in potent anti-tumor activity in MTAP-deleted tumor models, including complete and durable responses at well-tolerated doses below those required for monotherapy activity.
