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Mirati Announces IND Clearance by U.S. FDA Enabling Phase 1 Initiation for First-in-Class Oral KRASG12D Selective Inhibitor, MRTX1133

IND demonstrates Mirati’s leadership in KRAS, representing the Company’s third KRAS or KRAS-signaling program to enter clinical development

Excerpt from the Press Release:

SAN DIEGO, Jan. 19, 2023 /PRNewswire/ — Mirati Therapeutics, Inc. (NASDAQ: MRTX), announced today the U.S. Food and Drug Administration (FDA) has cleared the Investigational New Drug (IND) application of MRTX1133, a potential first-in-class oral KRASG12D selective inhibitor for clinical evaluation. KRASG12D mutations impact approximately 180,000 patients in the US and Europe, representing approximately a 2.5-fold increase in prevalence compared to KRASG12C mutations. No targeted oncology treatment options currently exist for these patients.

MRTX1133 is a highly potent investigational inhibitor of the KRASG12D driver mutation and demonstrated selective and reversible inhibition of KRASG12D in both its active and inactive states.  In addition, MRTX1133 administration resulted in marked tumor response in preclinical KRASG12D mutated pancreatic cancer models as well as lung and colorectal cancer models. MRTX1133 has demonstrated favorable properties including a low risk for off-target activity and drug interactions and a predicted human half-life of greater than 50 hours.

“The clearance by the FDA to initiate clinical evaluation of MRTX1133, the third program in our KRAS franchise to enter clinical development, is illustrative of the innovative approach to drug discovery and demonstrates the best-in-class capabilities of the Mirati team. This particular mutation has been difficult to target,

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