Oncology Central

FORWARD I: a Phase III study of mirvetuximab soravtansine versus chemotherapy in platinum-resistant ovarian cancer

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Abstract

Mirvetuximab soravtansine, an antibody–drug conjugate that binds with high affinity to folate receptor-α to provide tumor-directed delivery of the potent microtubule-disrupting agent DM4, has emerged as a promising investigational agent for the treatment of ovarian cancer, particularly in the setting of platinum-resistant disease. Here we describe the rationale and design of FORWARD I (NCT02631876), the first randomized, multicenter Phase III study to compare the safety and efficacy of mirvetuximab soravtansine versus investigator’s choice of chemotherapy in women with folate receptor-α-positive, platinum-resistant epithelial ovarian, primary peritoneal or fallopian tube cancer. Patients will be randomized in a 2:1 ratio. The primary end point is progression-free survival, and key secondary objectives include comparison of overall response rates, overall survival and duration of response.

Ovarian cancer is a leading cause of gynecologic cancer mortality worldwide, responsible for over 150,000 deaths each year [1]. Family history and the presence of penetrant mutations in genes such as BRCA1 and BRCA2 are significant risk factors for the development of ovarian cancer; epidemiological research has also identified a variety of hormonal and reproductive factors that can either increase (e.g., older age at menopause, hormone replacement therapy) or decrease (e.g., parity, lactation, oral contraceptive use) the likelihood of disease (reviewed in [2]). Epithelial ovarian cancer (EOC) accounts for approximately 95% of ovarian cancer malignancies [3,4].

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