Seattle Genetics and Astellas announced the submission of a Biologics License Application for accelerated approval to the U.S. FDA for enfortumab vedotin for the treatment of patients with locally advanced or metastatic urothelial cancer who have received a PD-1/L1 inhibitor and who have received a platinum-containing chemotherapy in the neoadjuvant/adjuvant, locally advanced or metastatic setting. 

The submission is based on results from the first cohort of patients in the EV-201 pivotal phase 2 clinical trial that were presented as a late-breaking abstract at the annual meeting of the American Society of Clinical Oncology (ASCO) in June. 

EV-201 is an ongoing single-arm, pivotal trial in patients with locally advanced or metastatic urothelial cancer who have been previously treated with a PD-1/L1 inhibitor and a platinum-containing chemotherapy (cohort 1) and those who have not received a platinum-containing chemotherapy or who are ineligible for cisplatin (cohort 2). In cohort 1, 128 patients were enrolled at multiple centers internationally. The primary endpoint is confirmed objective response rate per blinded independent central review. EV-201 continues to enroll patients in cohort 2.

A global, randomized phase 3 confirmatory clinical trial (EV-301) is ongoing and is intended to support global registrations. Another ongoing trial, EV-103, is evaluating enfortumab vedotin in earlier lines of treatment for patients with locally advanced or metastatic urothelial cancer, including in combination with pembrolizumab and/or platinum chemotherapy in newly diagnosed patients as well as patients whose cancer progressed from earlier-stage disease. 

The FDA granted enfortumab vedotin Breakthrough Therapy designation in March of 2018 for patients with locally advanced or metastatic urothelial cancer whose disease has progressed during or following checkpoint inhibitor therapy.


About Urothelial Cancer

Urothelial cancer is the most common type of bladder cancer (90 percent of cases). In 2018, more than 82,000 people were diagnosed with bladder cancer in the United States. Globally, approximately 549,000 people were diagnosed with bladder cancer last year, and there were approximately 200,000 deaths worldwide.


About Enfortumab Vedotin

Enfortumab vedotin is an investigational antibody drug conjugate (ADC) composed of an anti-Nectin-4 monoclonal antibody attached to a microtubule-disrupting agent, MMAE, using Seattle Genetics’ proprietary linker technology. Enfortumab vedotin targets Nectin-4, a cell adhesion molecule that is expressed on many solid tumors, and that has been identified as an ADC target by Astellas.

Source: Seattle Genetics

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