Positive CHMP opinion for mirvetuximab soravtansine (Elahere) for the treatment of certain adult ovarian cancer

Patients with ovarian cancer are often diagnosed with late-stage disease, undergo surgery and are then primarily treated with platinum-based chemotherapy. Over time patients may become resistant to platinum-based treatment and will require another therapy. The CHMP's opinion is supported by results of the Phase III MIRASOL clinical trial and the European Commission decision on this indication for mirvetuximab soravtansine is anticipated later this year. Elahere (mirvetuximab soravtansine-gynx) was granted full FDA approval in the United States in March 2024. Marketing authorization submissions for mirvetuximab soravtansine are under review in multiple other countries.

ABOUT THE PHASE III MIRASOL TRIAL ;MIRASOL is a global Phase III open-label, randomized, controlled trial that enrolled 453 patients to compare the efficacy and safety of mirvetuximab soravtansine with the investigator's choice of single-agent chemotherapy (weekly paclitaxel, pegylated liposomal doxorubicin, or topotecan) in the treatment of platinum-resistant, high-grade serous ovarian cancer whose tumors express high levels of FR aalpha (greater than 75% of cells with greater than 2+ staining intensity). Participants had previously received one to three lines of prior therapy. The primary endpoint was investigator-assessed progression-free survival (PFS). Key secondary endpoints included objective response rate (ORR) and overall survival (OS).Results of the study were previously shared in June 2023.