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PRINCETON, N.J., Nov. 09, 2023 (GLOBE NEWSWIRE) -- PDS Biotechnology Corporation (NASDAQ:PDSB) ("PDS Biotech" or the "Company"), a clinical-stage immunotherapy company developing a growing pipeline of targeted cancer immunotherapies and infectious disease vaccines based on the Company's proprietary T cell activating platforms, today announced updated survival data from the Phase 2 clinical trial investigating the triple combination of PDS0101, PDS0301 (IL-12 antibody-drug conjugate) and an investigational immune checkpoint inhibitor (ICI) in two groups of advanced cancer patients with various types of human papillomavirus (HPV) 16-positive cancers. The ICI naïve group had not responded to standard-of-care treatments but had not yet been treated with an ICI. The ICI resistant group included patients who had not responded to multiple prior treatments, including ICI therapy. Investigators at the National Cancer Institute (NCI), part of the National Institutes of Health, have completed the primary endpoint analysis of the Phase 2 trial.
In the ICI naïve group, final survival data from the trial indicated that 75% (6/8) of these patients were still alive at 36 months, and the median overall survival (OS) has not yet been reached. Published data on standard-of-care ICIs report 30-50% of these patients typically remain alive at 12 months, and less than 30% of the patients remain alive at 24 months.
In the ICI resistant group, the 12-month OS rate was 72% and the triple combination achieved a median OS of approximately 20 months. In addition:
"We are encouraged by the survival rates for both ICI naïve and ICI resistant patients with HPV16-positive cancers who were treated with the triple combination therapy," said Frank Bedu-Addo, PhD, Chief Executive Officer of PDS Biotech. "The ICI resistant data from the VERSATILE-002 trial evaluating PDS0101 in combination with KEYTRUDA® (pembrolizumab) that were reported October 3, 2023, further clarify the path forward for a potential registrational clinical trial of PDS0101 and PDS0301 in combination with a commercial ICI. With this exciting information, we will be finalizing the regulatory and clinical pathway for the triple combination with OS as the primary endpoint."
PDS0101, PDS Biotech's lead candidate, is a Versamune® based investigational immunotherapy designed to stimulate a potent targeted T cell attack against HPV16-positive cancers. PDS0301 is a novel, proprietary investigational tumor-targeting IL-12 antibody-drug conjugate that enhances the proliferation, potency, and longevity of T cells in the tumor microenvironment formulated to overcome tumor immune suppression utilizing a different mechanism from checkpoint inhibitors. PDS Biotech has patented the combination of Versamune® and IL-12. The investigational ICI used in the triple combination therapy is Bintrafusp alfa, a bifunctional fusion protein targeting two independent immunosuppressive pathways (PD-L1 and TGF-β).
About PDS0101
PDS0101, PDS Biotech's lead candidate, is a novel investigational human papillomavirus (HPV)-targeted immunotherapy that stimulates a potent targeted T cell attack against HPV-positive cancers. PDS0101 is given by subcutaneous injection alone or in combination with other immunotherapies and cancer treatments. In a Phase 1 study of PDS0101 in monotherapy, the treatment demonstrated the ability to generate multifunctional HPV16-targeted CD8 and CD4 T cells with minimal toxicity. Interim data suggests PDS0101 generates clinically active immune responses, and the combination of PDS0101 with other treatments can demonstrate significant disease control by reducing or shrinking tumors, delaying disease progression and/or prolonging survival. The combination of PDS0101 with other treatments does not appear to compound the toxicity of other agents.
About PDS0301
PDS0301 is a novel investigational tumor-targeting IL-12 antibody-drug conjugate IL-12 that enhances the proliferation, potency and longevity of T cells in the tumor microenvironment. PDS0301 is given by a subcutaneous injection. PDS0301 is designed to improve the safety profile of IL-12 and to enhance the anti-tumor response.
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