Why Mirati Therapeutics Is Sinking

Mirati shares dropped on Monday after the company announced updated positive clinical data from its midstage study in non-small cell lung cancer.

Published October 22, 2018, 10:55am ET · 2 min read

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Mirati Therapeutics Inc. (NASDAQ: MRTX) shares dropped on Monday after the company announced updated positive clinical data from its midstage study in non-small cell lung cancer (NSCLC). The data were presented at the European Society for Medical Oncology (ESMO) 2018 Congress in Germany.

Specifically, the firm announced updated data from its ongoing Phase 2 clinical trial of sitravatinib in combination with Opdivo (nivolumab) in NSCLC patients with documented progression on prior immune checkpoint inhibitor therapy.

A few of the highlights from the study:

  • 45/56 of evaluable patients demonstrated tumor reductions.
  • 18/56 of evaluable patients demonstrated tumor reductions of greater than 30%.
  • 16/56 of evaluable patients achieved a Partial Response (PR) or Complete Response (CR).
  • 26/56 evaluable patients remained on treatment at the time of data cut-off including 8 responding patients.

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Based on guidance received from the FDA, Mirati plans to initiate a Phase 3 randomized clinical trial in second-line patients comparing the combination of sitravatinib plus a checkpoint inhibitor to docetaxel in patients whose tumors have progressed on prior checkpoint inhibitor therapy.

Ticiana Leal, M.D., Assistant Professor of Medicine, Thoracic Oncology Program Leader at the University of Wisconsin, commented:

To date, the combination of sitravatinib and nivolumab has demonstrated a significant number of durable responses in patients with advanced NSCLC who experienced disease progression following prior checkpoint inhibitor therapy, which is one of the most challenging clinical scenarios that we currently face for this patient population. The results of the study are encouraging as it continues to show a clinical benefit for these patients and has a favorable safety profile.

Shares of Mirati were last seen down nearly 20% at $32.06, with a consensus analyst price target of $57.89 and a 52-week trading range of $12.26 to $65.35.

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Chris Lange

Chris Lange is a financial and geopolitical writer with more than a decade of experience covering a myriad of topics. He has published thousands of articles for 24/7 Wall St., with past coverage focused heavily on stocks, IPOs, healthcare, defense, global affairs, and technology.

His work has been quoted, or referenced by a number of outlets including Business Insider, USA Today, Yahoo Finance, MSN, The Motley Fool, and many other publications. A graduate of Southwestern University, he studied business with a focus on investments and has previous experience in banking and startups.

When not reading or writing the news, he is following his passion for Lacrosse, playing chess, or building solar projects with his dad.

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