SOUTH SAN FRANCISCO, Calif. — Allogene Therapeutics, Inc. (Nasdaq: ALLO), a clinical-stage biotechnology company pioneering allogeneic CAR T (AlloCAR T) products for cancer and autoimmune disease, today announced that the U.S. Food and Drug Administration (FDA) has granted Regenerative Medicine Advanced Therapy (RMAT) and Fast Track designations to cemacabtagene ansegedleucel (cema-cel) for the treatment of adult patients with large B-cell lymphoma (LBCL) who, at the completion of first-line (1L) therapy, are in complete or partial response suitable for observation but test positive for minimal residual disease (MRD). Together, the designations enable more frequent FDA engagement and support an efficient development and review process.
Cema-cel is an investigational allogeneic CAR T product being studied in the pivotal ALPHA3 trial as part of 1L treatment for patients with LBCL who are at high risk of relapse. The ALPHA3 trial uses Natera’s CLARITY™ MRD assay, which is powered by its phased variant MRD technology, to identify patients in remission but who are likely to experience disease recurrence following completion of 1L chemoimmunotherapy. Patients who test positive for MRD are enrolled and assigned to receive either a single dose of cema-cel or close observation, the current standard of care, with outcomes compared between the two groups.
“The FDA’s decision to grant both RMAT and Fast Track designations provides additional validation for the strategy we defined with the ALPHA3 trial and strengthens our ability to work closely with the agency on an efficient path to advance cema-cel as a first-line consolidation therapy for large B-cell lymphoma,” said Zachary Roberts, M.D., Ph.D., President and Chief Executive Officer of Allogene Therapeutics. “There is a shared goal across the treatment community to reach patients earlier in their disease course and reduce the barriers that limit access to CAR T therapy. The interim ALPHA3 findings, which showed rapid and substantial MRD reduction, with most patients treated in the outpatient setting, support cema-cel’s potential as an off-the-shelf therapy that can be delivered at scale in community settings where approximately 80% of first-line patients receive their care.”
The FDA granted RMAT designation for cema-cel as 1L consolidation therapy for patients with high-risk LBCL following full review of the interim futility analysis from the ongoing ALPHA3 trial, underscoring the continued need for new treatment options. At the protocol-defined data cutoff, triggered when the 24th patient enrolled in the ongoing study arms completed the Day 45 MRD assessment, 58.3% (7/12) of patients in the cema-cel arm achieved MRD negativity compared to 16.7% (2/12) in the observation arm. This represents a 41.6% absolute difference in MRD clearance between the two arms. Published literature and cross-study benchmarks suggest that MRD clearance differences of 25-30% may lead to clinically meaningful improvement at study completion.
Cema-cel was well-tolerated as of the data cutoff with no treatment-related serious adverse events. There were no cases of cytokine release syndrome (CRS), immune effector cell-associated neurotoxicity syndrome (ICANS), graft-versus-host disease (GvHD) or high-grade infections. No tocilizumab or steroids were administered for toxicity prophylaxis or treatment, and no patients were hospitalized for treatment-related adverse events. This profile compares favorably with the broader CAR T experience, where hospitalization for toxicity management remains common.
Regenerative Medicine Advanced Therapy (RMAT) designation is intended to expedite the development and review of regenerative medicine therapies intended to treat, modify, or cure a serious or life-threatening disease or conditions when preliminary clinical evidence indicates the therapy has the potential to address an unmet medical need for that disease or condition. Fast Track designation further supports expedited development and review, including potential eligibility for rolling review and priority review, if relevant criteria are met.
About Allogene Therapeutics
Allogene Therapeutics, with headquarters in South San Francisco, is a clinical-stage biotechnology company pioneering the development of allogeneic chimeric antigen receptor T cell (AlloCAR T) products for cancer and autoimmune disease. Led by cell therapy veterans applying proven CAR T experience, Allogene is developing a pipeline of off-the-shelf CAR T cell product candidates with the goal of delivering readily available cell therapy on-demand, more reliably, and at greater scale to more patients. For more information, please visit www.allogene.com, and follow Allogene Therapeutics on X and LinkedIn.
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