Three-year follow-up data of an investigator-initiated Phase 1 trial of the individualized mRNA cancer vaccine candidate autogene cevumeran (BNT122, RO7198457) continue to show polyspecific T cell responses up to three years and delayed tumor recurrence in patients with resected pancreatic ductal adenocarcinoma ("PDAC")
A randomized Phase 2 clinical trial with autogene cevumeran in patients with resected PDAC is currently enrolling patients at clinical trial sites in the United States, with additional sites planned to open globally
The medical need in PDAC is high with a 5-year overall survival rate of only 8-10%1,2, high recurrence rates after surgery at nearly 80%3 and limited treatment options
Autogene cevumeran, jointly developed by BioNTech and Genentech Inc. ("Genentech"), a member of the Roche Group, is the lead candidate of BioNTech's mRNA-based individualized cancer vaccine platform iNeST and currently being evaluated in three ongoing randomized Phase 2 clinical trials in adjuvant PDAC, first-line melanoma, and adjuvant colorectal cancer
MAINZ, Germany, April 7, 2024 - BioNTech SE (Nasdaq: BNTX, "BioNTech" or "the Company") today announced three-year follow-up data from a Phase 1 trial with the mRNA-based individualized neoantigen-specific immunotherapy ("iNeST") candidate autogene cevumeran (also known as BNT122, RO7198457) in patients with resected pancreatic ductal adenocarcinoma ("PDAC"). The data show that in 8 out of 16 patients autogene cevumeran elicited an immune response up to three years post administration measured by activated T cells. The persistence of T cels was associated with a longer median recurrence-free survival in cancer vaccine responders.
"These new data are an early signal for the potential of our individualized mRNA cancer vaccine approach in this indication with an unmet medical need. The results indicate that our uridine mRNA-LPX technology can promote activation of cytotoxic T cells that may help to eliminate residual tumor foci at early stages of the disease to delay or prevent recurrence," said Prof. Özlem Türeci, M.D., Co-Founder and Chief Medical Officer at BioNTech. "Our ongoing Phase 2 trial with Genentech aims to confirm these findings on benefit for patients with PDAC compared with the current standard of care treatment in the post-surgical, adjuvant setting in a larger patient population. We remain committed to our vision of personalized cancer medicine and aim to help advance the standard of care for many patients."
The results featured in an oral presentation at the American Association for Cancer Research ("AACR") Annual Meeting 2024 show the following:
In 8 of 16 patients, autogene cevumeran elicited high-magnitude T cells specific to the encoded neoantigens.
98% of the T cells targeting individual neoantigens on the tumor and induced by autogene cevumeran were de novo in that they were not detected in blood, tumors, and adjacent tissues prior to administration of the investigational treatment.
Over 80% of the vaccine-induced neoantigen-specific T cells could still be detected up to three years post administration in patients with an immune response. These patients showed a prolonged median recurrence-free survival compared to non-responders.
6 of 8 patients with an immune response to autogene cevumeran remained disease free during the three-year follow-up period, while 7 of the 8 patients without an immune response to the treatment during the trial showed tumor recurrence.
The investigator-initiated, single center Phase 1 trial (NCT04161755) evaluated the safety of autogene cevumeran in sequential combination with the anti-PD-L1 immune checkpoint inhibitor atezolizumab and standard-of-care chemotherapy in 16 patients with resected PDAC. Data from the 1.5-year median follow-up were published in Nature in May 2023. The current data update includes a three-year median follow-up and was presented in a late-breaking oral presentation at the AACR Annual Meeting 2024 in San Diego, California, by principal investigator Vinod Balachandran, M.D., surgeon-scientist at Memorial Sloan Kettering Cancer Center and principal investigator of the study.
An ongoing open-label, multicenter, randomized Phase 2 trial (NCT05968326), sponsored by Genentech in collaboration with BioNTech, was started in October 2023. The trial will investigate the efficacy and safety of adjuvant autogene cevumeran in combination with the anti-PD-L1 immune checkpoint inhibitor atezolizumab and chemotherapy compared with the current standard of care chemotherapy (mFOLFIRINOX) in patients with PDAC. The Phase 2 trial is currently enrolling patients at clinical trial sites in the United States, with additional sites planned to open globally. Autogene cevumeran is being jointly developed by BioNTech and Genentech and is currently being evaluated in three ongoing randomized Phase 2 clinical trials in adjuvant PDAC (as mentioned above), first-line melanoma, and adjuvant colorectal cancer.
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About resected pancreatic ductal adenocarcinoma (PDAC)
PDAC is amongst the leading causes of cancer-related deaths in the United States4 with approximately 90% of patients dying within two years of their diagnosis5. A combination of surgical removal and systemic cytotoxic chemotherapy has shown to improve clinical outcomes; however, even with surgical resection, the relapse rate remains high, and the 5-year overall survival is only approximately 20%6 in patients who undergo surgery followed by adjuvant chemotherapy ("ACT") and only 8-10%i,ii in those who do not receive ACT. Thus, there is an unmet medical need for novel therapies for patients with resected PDAC.
About iNeST (individualized Neoantigen Specificimmuno Therapy)
iNeST immunotherapies are investigational individualized cancer therapies tailored to a specific patient's tumor. They contain unmodified, pharmacologically optimized mRNA encoding up to 20 patient-specific neoantigens, identified using real-time next-generation sequencing and bioinformatic neoantigen discovery. Neoantigens are proteins that are produced by cancer cells that differ from the proteins produced by healthy cells and are recognized by immune cells. The mRNA is encapsulated in BioNTech's proprietary intravenous RNA-lipoplex delivery formulation which is designed to enhance stability as well as enable targeted delivery to dendritic cells. By analyzing each patient's tumor, BioNTech is able to identify the cancer mutations that may act as neoantigens. Each individual cancer vaccine encodes for neoantigen candidates with the highest likelihood of helping the immune system recognize the cancer. For this purpose, BioNTech has developed an on-demand manufacturing process, following Good Manufacturing Practice (GMP) conditions. Autogene cevumeran is currently being evaluated in various solid tumor indications, including three Phase 2 clinical trials in first-line melanoma, adjuvant colorectal cancer, and adjuvant pancreatic ductal adenocarcinoma.