The FINANCIAL — Roche on September 27 announced early results from a pivotal phase II study, IMvigor 210, of the investigational cancer immunotherapy atezolizumab (anti-PDL1; MPDL3280A) in people with locally advanced or metastatic urothelial carcinoma (mUC).
The study showed that atezolizumab shrank tumours (objective response rate, ORR) in 27 percent of people with mUC whose disease had medium and high levels of PD-L1 expression and worsened after initial treatment. Ninety-two percent of people who responded to atezolizumab continued to respond when the results were assessed. Median duration of response was not yet reached. Adverse events were consistent with those observed in previous studies, according to Roche.
“These results may represent the first major treatment advancement in advanced bladder cancer in nearly 30 years,” said Sandra Horning, MD, Chief Medical Officer and Head of Global Product Development. “We are encouraged that responses to atezolizumab were ongoing in the large majority of people when the study results were assessed.”
Roche is planning to submit these data to global health authorities and to the FDA under a Breakthrough Therapy Designation for the treatment of people whose metastatic bladder cancer expresses PD-L1. This designation is designed to expedite the development and review of medicines intended to treat serious diseases that may demonstrate substantial improvement over existing therapies.