Complete Response Letter on Bladder Cancer Therapy
FDA has issued Telesta Therapeutics a complete response letter on its BLA for MCNA (Mycobacterium phlei cell wall-nucleic acid complex), indicated for treating high risk non-muscle invasive bladder cancer patients who have failed front line Bacillus Calmette-Guerin therapy. The agency’s letter indicated that an additional Phase 3 clinical trial for MCNA would be necessary to adequately establish its efficacy and safety, according to the company. It also encouraged Telesta to meet with FDA reviewers to discuss further clinical development of MCNA.
“The FDA decision, at this point, to require an additional clinical trial, is a setback for under-served bladder cancer patients, our dedicated staff, and our investors who have funded our efforts to obtain MCNA approval in the U.S.,” the company says. “MCNA would have been the first new bladder cancer therapeutic to reach the market since 1998.”
MCNA is a biologic therapy developed to provide high-risk, non-muscle invasive bladder cancer patients who are refractory to or relapsing from first line therapy with bacillus Calmette-Guerin. It is derived from the cell wall fractionation of a non-pathogenic bacteria, and its activity is believed to be through a dual mechanism of immune stimulation and direct anti-cancer effects, the company says.