FDA Approves UroGen Bladder Cancer Therapy
FDA has approved a UroGen Pharma NDA for Zusduri (mitomycin intravesical solution) for adult patients with recurrent low-grade intermediate-risk non-muscle invasive bladder cancer.
Approval was based on data from the ENVISION trial (NCT05243550) that evaluated patients’ complete response (CR) at three months and duration of response (DoR), an FDA release says. CR was defined as no detectable disease in the bladder by cystoscopy and urine cytology. “Among the 223 patients evaluable for response, 78% (95% CI: 72, 83) had a CR,” it says. The DoR ranged from 0 to 25+ months and 79% of responding patients remained in response for at least 12 months.
FDA says the most common adverse reactions (greater than 10%), including laboratory abnormalities, were increased creatinine, increased potassium, dysuria, decreased hemoglobin, increased aspartate aminotransferase, increased alanine aminotransferase, increased eosinophils, decreased lymphocytes, urinary tract infection, decreased neutrophils and hematuria. Serious adverse reactions occurred in 12% of patients, including urinary retention (0.8%) and urethral stenosis (0.4%), it adds. A fatal adverse reaction of cardiac failure occurred in one patient.
The approval follows a split vote last month by FDA’s Oncologic Drugs Advisory Committee (4 yes votes to 5 no votes) on whether Zusduri demonstrated a favorable benefit-risk profile (see story). Case Western Reserve Cancer Center oncologist Daniel Spratt voted no and said that without a full randomized trial it was hard to determine mitomycin’s true benefit, adding that there was very limited long-term follow-up.
In voting yes, National Cancer Institute Urologic Oncology Branch associate director Mark Ball acknowledged that a fully enrolled, randomized clinical trial would have mitigated many critiques of mitomycin’s benefit-risk profile. Regardless, he said the company’s data demonstrated both efficacy at three months and that a nonsurgical intervention to treat this disease state was quite encouraging.