On March 27, 2024 Novocure (NASDAQ: NVCR) reported the phase 3 METIS clinical trial met its primary endpoint, demonstrating a statistically significant improvement in time to intracranial progression for adult patients treated with Tumor Treating Fields (TTFields) therapy and supportive care compared to supportive care alone in the treatment of patients with 1-10 brain metastases from non-small cell lung cancer (NSCLC) following stereotactic radiosurgery (SRS) (Press release, NovoCure, MAR 27, 2024, View Source [SID1234641522]). Patients treated with TTFields therapy and supportive care exhibited a median time to intracranial progression of 21.9 months compared to 11.3 months in patients treated with supportive care alone for brain metastasis (n=298; hazard ratio=0.67; P=0.016). Median TTFields therapy treatment duration was 16 weeks and median usage was 67%. Consistent with previous studies, TTFields therapy was well-tolerated with sustained quality of life and neurocognitive function. Baseline characteristics were well balanced between arms.

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"Patients with brain metastases from non-small cell lung cancer are frequently treated with radiosurgery but face a high likelihood of rapid brain relapse," said Minesh Mehta, MD, Chief of Radiation Oncology and Deputy Director at Miami Cancer Institute, part of Baptist Health South Florida. "In this international, multicenter, phase 3 trial, the use of TTFields therapy significantly delayed time to brain relapse, with associated improvement in quality of life and stable cognition. This is a major benefit and is potentially practice changing."

Preliminary analyses of key secondary endpoints (time to neurocognitive failure, overall survival, and radiological response rate) did not demonstrate statistical significance. Certain secondary endpoints showed positive trends in favor of treatment with TTFields therapy, including time to distant progression and quality of life. Full analysis of secondary endpoints is ongoing.

"Novocure’s willingness to pursue areas of considerable unmet need, like the patient population studied in METIS, is a point of pride for our company," said Asaf Danziger, Novocure’s Chief Executive Officer. "We are so pleased with the positive outcome of this trial and encouraged by TTFields’ performance. I would like to thank everyone involved with METIS, especially our courageous patients and dedicated investigators, for their contributions to the trial and for meaningfully contributing to the evolution of treatment of brain metastases from NSCLC."

Novocure intends to submit these data to regulatory authorities. Novocure also intends to publish these findings in a peer-reviewed scientific journal and share them at an upcoming scientific congress.

Conference Call Details

Novocure will host a conference call and webcast to discuss the METIS topline results at 8:00 a.m. EST today, March 27th. To access the conference call by phone, use the following conference call registration link and dial-in details will be provided. To access the webcast, use the following webcast registration link.

The webcast and slides presented during the webcast can be accessed live from the Investor Relations page of Novocure’s website, www.novocure.com/investor-relations, and will be available for at least 14 days following the call. Novocure has used, and intends to continue to use, its investor relations website as a means of disclosing material non-public information and for complying with its disclosure obligations under Regulation FD.

About METIS

METIS [NCT02831959] is a phase 3 trial of stereotactic radiosurgery with or without TTFields therapy for patients with 1-10 brain metastases from NSCLC. 298 adult patients were enrolled in the trial and randomized to receive either TTFields therapy with supportive care or supportive care alone following SRS. Supportive care consisted of, but was not limited to, treatment with steroids, anti-epileptic drugs, anticoagulants, pain control or nausea control medications. Patients in both arms of the study were eligible to receive systemic therapy for their NSCLC at the discretion of their treating physician. Patients with known tumor mutations for which targeted agents are available were excluded from the trial.

The primary endpoint of the METIS trial is time to first intracranial progression, as measured from the date of first SRS treatment to intracranial progression or neurological death (per RANO-BM criteria), whichever occurs first. Time to intracranial progression was calculated according to the cumulative incident function. Patient scans were evaluated by a blinded, independent radiologic review committee. Secondary endpoints include, but are not limited to, time to distant progression, time to neurocognitive failure, overall survival, time to second intracranial progression, quality of life and adverse events. Key secondary endpoints (time to neurocognitive failure, overall survival, and radiological response rate) were planned to be used in labeling claims, if successful. Patients were stratified by the number of brain metastases (1-4 or 5-10 metastases), prior systemic therapy, and tumor histology. Patients were allowed to crossover to the experimental TTFields therapy arm following confirmation of second intracranial progression.

About Brain Metastases

Brain metastases are a secondary tumor formed when cancer cells break away from the primary tumor and travel through the blood or lymph system to form new tumors (or metastases) in the brain. Brain metastasis are a negative prognostic factor in NSCLC and adversely impact neurocognitive function and quality of life. Approximately 25% of patients with NSCLC have brain metastasis at diagnosis, and lifetime risk among patients with NSCLC is approximately 50%. Neurologic symptoms are present in approximately 60-75% of patients with brain metastasis, and seizures, focal neurologic deficits, headaches, and altered mental status are common. Treatment options for patients with brain metastasis from NSCLC are limited to neurosurgery, SRS, whole brain radiation therapy, or combinations of these options. However, given the neurotoxicity and significant decline in cognitive functioning, whole brain radiation therapy (WBRT) is an unfavorable treatment option. New therapeutic options are needed for greater intracranial control while minimizing the risk of neurocognitive adverse events.

About Tumor Treating Fields Therapy

Tumor Treating Fields (TTFields) are electric fields that exert physical forces to kill cancer cells via a variety of mechanisms. TTFields do not significantly affect healthy cells because they have different properties (including division rate, morphology, and electrical properties) than cancer cells. The multiple, distinct mechanisms of TTFields therapy work together to selectively target and kill cancer cells. Due to its multimechanistic actions, TTFields therapy can be added to cancer treatment modalities in approved indications and demonstrates enhanced effects across solid tumor types when used with chemotherapy, radiotherapy, immune checkpoint inhibition, or PARP inhibition in preclinical models. TTFields therapy provides clinical versatility that has the potential to help address treatment challenges across a range of solid tumors. To learn more about Tumor Treating Fields therapy and its multifaceted effect on cancer cells, visit tumortreatingfields.com.