FDA Approves GSK's Jideytro for ROS1-Positive Lung Cancer

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FDA has approved GSK's Jideytro (zidesamtinib) for adults with locally advanced or metastatic ROS1-positive non-small cell lung cancer (NSCLC) who have previously been treated with a ROS1 kinase inhibitor, giving patients with the rare form of lung cancer a new targeted treatment option. The approval came ahead of the drug’s 9/18 user fee target date and follows the agency’s earlier Breakthrough Therapy and Orphan Drug designations.

Jideytro is GSK's first approved treatment for lung cancer and was added to the company's pipeline through its recent acquisition of Nuvalent Inc. The next-generation ROS1-selective inhibitor was designed to overcome resistance mutations, improve tolerability and penetrate the blood-brain barrier to treat tumors that have spread to the central nervous system.

The approval was supported by data from the global Phase I/II ARROS-1 trial, which enrolled patients with advanced or metastatic ROS1-positive NSCLC who had previously received a ROS1 inhibitor, according to the company.

Among 117 evaluable patients, Jideytro achieved an objective response rate of 44%, with responses proving durable over time. The duration of response rate was 82% at six months and 69% at 12 months. The study also demonstrated activity in patients with brain metastases and ROS1 resistance mutations.

"The rapid progression of Jideytro from development to approval reflects both the strength of the underlying science and the urgent need for additional effective and tolerable treatments for ROS1-positive lung cancer," GSK's chief scientific officer Tony Wood is quoted in a release as saying.

ROS1-positive NSCLC is a rare molecular subtype of lung cancer diagnosed in an estimated 50,000 people worldwide each year. The disease frequently affects younger adults, including non-smokers in their 40s and 50s, and commonly spreads to the brain.

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