This is a multicenter, randomized controlled clinical trial (HOPE-07) designed to evaluate the efficacy and safety of perioperative treatment with disitamab vedotin (RC48) combined with toripalimab compared with toripalimab combined with chemotherapy in patients with resectable HER2-expressing (HER2 1+, 2+, or 3+) muscle-invasive bladder cancer (MIBC, cT2-4aN0/1M0).A total of 240 patients will be enrolled and randomized in a 1:1 ratio to receive either RC48 plus toripalimab or chemotherapy plus toripalimab, with 120 patients in each arm.
The primary objective is to compare 2-year event-free survival (2-year EFS) between the two treatment groups.
Secondary endpoints include pathological complete response (pCR), event-free survival (EFS), disease-free survival (DFS), 1-year event-free survival (1-year EFS), metastasis-free survival (MFS), overall survival (OS), R0 resection rate, and safety outcomes including adverse events (AEs), serious adverse events (SAEs), vital signs, physical examination, ECOG performance status, laboratory tests, and electrocardiography, assessed according to CTCAE v5.0.
Exploratory objectives include assessment of quality of life using EQ-5D-5L and EORTC QLQ-C30, evaluation of associations between biomarkers (HER2 expression, PD-L1 expression, circulating tumor DNA) and treatment efficacy, and multi-omics analyses using tumor tissue, ctDNA, and urinary tumor DNA to identify potential predictive biomarkers.