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Innovative combination therapy shows promise for bladder cancer patients unresponsive to standard treatment

CORE-001 trial demonstrates efficacy of oncolytic virus and immune checkpoint inhibitor in treating non-muscle invasive bladder cancer

2024-06-06
(Press-News.org) TAMPA, Fla. (June 6, 2024) — In a groundbreaking advance that could revolutionize bladder cancer treatment, a novel combination of cretostimogene grenadenorepvec and pembrolizumab has shown remarkable efficacy in patients with Bacillus Calmette-Guérin (BCG)-unresponsive non-muscle invasive bladder cancer. Results from the phase 2 CORE-001 trial, published today in Nature Medicine, reveal a significant improvement in complete response rates and long-term disease control, offering new hope for patients with this challenging condition who face limited treatment options.

The trial included patients with BCG-unresponsive carcinoma in situ of the bladder, a condition that is notoriously difficult to treat and often leads to radical cystectomy. The combination therapy of intravesical cretostimogene grenadenorepvec (an intravesically delivered oncolytic immunotherapy) with systemic pembrolizumab (an immune checkpoint inhibitor) demonstrated a complete response rate of 57.1% at 12 months, surpassing previous benchmarks set by other therapies. The trial also demonstrated durable responses; findings show a complete response rate of 82.9% at three months, with a median duration of response not yet reached after a median follow-up of 26.5 months.

"This study marks an important step forward in the treatment of BCG-unresponsive NMIBC," said Roger Li, M.D., principal investigator of the trial and urologic oncologist at Moffitt Cancer Center. "Our findings indicate that the combination of cretostimogene grenadenorepvec and pembrolizumab offers a unique, efficacious and durable bladder-preserving alternative strategy to radical cystectomy."

The oncolytic immunotherapy directly enters the bladder cancer cells, destroys them, and then stimulates an anti-tumor response from the body's immune system. Pembrolizumab, a well-known PD-1 inhibitor, further enhances the immune system's ability to attack cancer cells. The observed clinical benefits stem from the synergistic effect of these two therapies.

"These encouraging results highlight the potential for oncolytic immunotherapy to synergize with immune checkpoint inhibitors, offering a new avenue for patients who have exhausted other treatment options," Li said. "We are optimistic that additional clinical trials will confirm these benefits and support the integration of both monotherapy and combination therapies into the standard-of-care for BCG-unresponsive non-muscle invasive bladder cancer."

The study noted that adverse events were manageable and consistent with those observed in previous monotherapy trials. The most common side effects related to cretostimogene were bladder-related symptoms, while pembrolizumab-related adverse events were typical of systemic immunotherapy.

The trial, funded by CG Oncology (NASDAQ: CGON) in collaboration with Merck, underscores the importance of innovative therapeutic approaches in oncology. Future research will focus on validating these findings in larger cohorts and exploring the underlying mechanisms of action.

For more information about the study, please visit ClinicalTrials.gov.

About Moffitt Cancer Center
Moffitt is dedicated to one lifesaving mission: to contribute to the prevention and cure of cancer. The Tampa-based facility is one of only 57 National Cancer Institute-designated Comprehensive Cancer Centers, a distinction that recognizes Moffitt’s scientific excellence, multidisciplinary research, and robust training and education. Moffitt’s expert nursing staff is recognized by the American Nurses Credentialing Center with Magnet® status, its highest distinction. For more information, call 1-888-MOFFITT (1-888-663-3488), visit MOFFITT.org, and follow the momentum on Facebook, Twitter, Instagram and YouTube. 

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[Press-News.org] Innovative combination therapy shows promise for bladder cancer patients unresponsive to standard treatment
CORE-001 trial demonstrates efficacy of oncolytic virus and immune checkpoint inhibitor in treating non-muscle invasive bladder cancer