Sequential Intravesical Mitomycin Plus Bacillus Calmette-Guérin for Non-muscle-invasive Urothelial Bladder Carcinoma: Translational and Phase I Clinical Trial
Overview
Authors
Affiliations
Purpose: To determine the safety and toxicities of sequential MMC (mitomycin C) + BCG (bacillus Calmette-Guérin) in patients with non-muscle-invasive bladder cancer (NMIBC) and explore evidence for potentiation of BCG activity by MMC.
Experimental Design: A 3 + 3 phase I dose-escalation trial of six weekly treatments was conducted in patients with NMIBC. MMC (10, 20, or 40 mg) was instilled intravesically for 30 minutes, followed by a 10-minute washout with gentle saline irrigation and then instillation of BCG (half or full strength) for 2 hours. Urine cytokines were monitored and compared with levels in a control cohort receiving BCG only. Murine experiments were carried out as described previously.
Results: Twelve patients completed therapy, including 3 patients receiving full doses. The regimen was well tolerated with no treatment-related dose-limiting toxicities. Urinary frequency and urgency, and fatigue were common. Eleven (91.7%) patients were free of disease at a mean (range) follow-up of 21.4 (8.4-27.0) months. Median posttreatment urine concentrations of IL2, IL8, IL10, and TNFα increased over the 6-week treatment period. A greater increase in posttreatment urinary IL8 during the 6-week period was observed in patients receiving MMC + BCG compared with patients receiving BCG monotherapy. In mice, intravesical MMC + BCG skewed tumor-associated macrophages (TAM) toward a beneficial M1 phenotype.
Conclusions: Instillation of sequential MMC + BCG is safe tolerable up to 40-mg MMC plus full-strength BCG. This approach could provide improved antitumor activity over BCG monotherapy by augmenting beneficial M1 TAMs.
Matloubieh J, Hanelin D, Agalliu I Cancers (Basel). 2025; 16(24.
PMID: 39766024 PMC: 11674742. DOI: 10.3390/cancers16244125.
Derre L, Lucca I, Cesson V, Bohner P, Crettenand F, Rodrigues-Dias S J Immunother Cancer. 2023; 11(12).
PMID: 38101861 PMC: 10729085. DOI: 10.1136/jitc-2023-008020.
Yu H, Bai Y, Qiu J, He X, Xiong J, Dai Q Front Oncol. 2021; 11:736882.
PMID: 34900687 PMC: 8654729. DOI: 10.3389/fonc.2021.736882.
Reyes R, Zhang C, Deng Y, Ji N, Mukherjee N, Padron A Oncoimmunology. 2021; 10(1):2006529.
PMID: 34858732 PMC: 8632314. DOI: 10.1080/2162402X.2021.2006529.
Liu L, Shi W, Xiao X, Wu X, Hu H, Yuan S Oncol Rep. 2021; 46(5).
PMID: 34581419 PMC: 8493057. DOI: 10.3892/or.2021.8196.