Study of Erdafitinib Intravesical Delivery System for Localized Bladder Cancer

The purpose of the study in Part 1 (dose escalation) and in Part 2 (dose expansion) is to determine the recommended Phase 2 dose(s) (RP2D\[s\]) and evaluate preliminary clinical efficacy. Part 3 (dose expansion) will confirm safety and preliminary clinical activity at the RP2D. Part 4 (RP2D expansion; MoonRISe-2) will assess the overall complete response (CR) in participants with intermediate-risk-non-muscle invasive bladder cancer (IR-NMIBC; means the cancer cells are only in the bladder's inner lining).

Bladder cancer is one of the most common malignancy worldwide, and non-muscle invasive (NMIBC) requires intensive regimens of frequent monitoring and local resection (transurethral resection of bladder \[TURBT\]). This study enrolls participants with non-muscle invasive or muscle invasive bladder cancer with activating fibroblast growth factor receptor (FGFR) mutations or fusions. Erdafitinib is a pan-FGFR inhibitor with demonstrated clinical activity when administered orally in patients with solid tumors, including bladder cancer, with FGFR genetic alterations. The Erdafitinib intravesical delivery system is designed to provide release of Erdafitinib in the bladder to treat localized bladder cancer, while reducing systemic toxicities. The study consists of a screening phase, a treatment phase, and a follow-up phase. Total duration of the study is approximately up to 7 years 4 months.