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Mirati Therapeutics (MRTX) Phase 3 SAPPHIRE Study Evaluating Sitravatinib in Combination with OPDIVO Does Not Meet Primary Endpoint

May 24, 2023 4:02 PM EDT

Mirati Therapeutics, Inc.® (NASDAQ: MRTX), a commercial-stage oncology company, today announced that the SAPPHIRE study did not meet its primary endpoint of overall survival at the final analysis. SAPPHIRE is a Phase 3 study evaluating sitravatinib in combination with nivolumab (OPDIVO®)1 versus docetaxel in patients with second or third line advanced non-squamous non-small cell lung cancer (NSQ-NSCLC) who progressed on prior therapy with chemotherapy and immune checkpoint inhibitor therapy. The company plans to disclose the study data at a future date.

Principal Investigators will be given the option to continue therapy for patients who are experiencing clinical benefit and would like to remain on treatment.

"Mirati extends gratitude to the patients who participated in this clinical trial, their loved ones, and the trial investigators, without whom important work like this would not have been possible," said Alan Sandler, M.D., Chief Medical Officer. "As we move forward, we are optimistic about our ability to positively impact the lives of patients living with cancer through the advancement of our broad and differentiated pipeline of targeted oncology programs."

About Mirati Therapeutics, Inc.®

Mirati Therapeutics, Inc. is a commercial stage biotechnology company whose mission is to discover, design and deliver breakthrough therapies to transform the lives of patients with cancer and their loved ones. The company is relentlessly focused on bringing forward therapies that address areas of high unmet need, including lung cancer, and advancing a pipeline of novel therapeutics targeting the genetic and immunological drivers of cancer. Unified for patients, Mirati's vision is to unlock the science behind the promise of a life beyond cancer.

For more information about Mirati, visit us at Mirati.com or follow us on Twitter, LinkedIn, and Facebook.

About Sitravatinib

Sitravatinib is an investigational spectrum-selective kinase inhibitor that potently inhibits receptor tyrosine kinases (RTKs), including TAM family receptors (TYRO3, Axl, Mer), split family receptors (VEGFR2, KIT) and RET. Sitravatinib is being evaluated in combination with nivolumab (OPDIVO®), an anti-PD-1 checkpoint inhibitor, in patients whose cancers have progressed despite treatment with a checkpoint inhibitor. Sitravatinib's potent inhibition of TAM and split family RTKs may overcome resistance to checkpoint inhibitor therapy through targeted reversal of an immunosuppressive tumor microenvironment, enhancing antigen-specific T cell response and expanding dendritic cell-dependent antigen presentation. Sitravatinib is being evaluated in multiple clinical trials to treat patients who are resistant to prior immune checkpoint inhibitor therapy and progressed on platinum doublet therapy, including the ongoing potentially registration-enabling Phase 3 trial of sitravatinib in combinations with a checkpoint inhibitor in non-small cell lung cancer (NSCLC). In addition, sitravatinib in combination with checkpoint inhibitors are being evaluated in selected checkpoint inhibitor naïve patients.

For more information visit Mirati.com/science.



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