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PRINCETON, N.J., Oct. 23, 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 immune response data from a preliminary analysis of a subset of patients in VERSATILE-002, the Phase 2 clinical trial evaluating the safety and efficacy of PDS0101 in combination with Merck's anti-PD-1 therapy KEYTRUDA® (pembrolizumab) in patients with human papillomavirus (HPV)16-positive recurrent or metastatic head and neck squamous cell carcinoma (HNSCC). The data presented during the European Society for Medical Oncology Congress 2023 (ESMO Congress 2023) provided preliminary insight to the pre-existing immune responses in advanced HPV-positive HNSCC patients and potential changes to the immune profile after treatment.
"Generation of multifunctional, anti-tumor T cells with the relevant cytokine and chemokine profiles are necessary for effective long-term control of tumor growth and clinical outcomes. This initial study focused on understanding the immunological profile of advanced head and cancer patients in the blood," said Kevin Harrington, PhD, Professor of Biological Cancer Therapies, The Royal Marsden. "This preliminary study suggests that PDS0101 may promote a TH1 predominant cytokine profile as well as induction of important T cell activating chemokines. Such studies could be helpful in providing further insight into how PDS0101 in combination with KEYTRUDA® alters T cell cytokine and chemokine profiles to promote improved clinical outcomes."
The data presented at ESMO 2023 included 18 patients with a median age of 63 years (range 46-83) and all had confirmed HPV16-positive tumors. The immunological profiles were assessed at three timepoints: pre-treatment,12 (cycle 5), and 36 weeks (cycle 13) following four and five cycles of combination therapy, respectively.
Highlights of the analysis include:
"This analysis provides preliminary insights into how PDS0101 in combination with KEYTRUDA® may be impacting specific cytokines and chemokines in CD8 and CD4 T cell populations," said Lauren V. Wood, MD, Chief Medical Officer of PDS Biotech. "The investigational combination appears to be promoting a predominant TH1 immunologic profile that is associated with decreases in CD8 T cells in peripheral blood. We are encouraged that these observations align with other Phase 2 studies reporting PDS0101-induced polyfunctional CD8 T cells traffic to tumors and we look forward to continued investigation in our VERSATILE-003 Phase 3 study."
1 Klopp A, et al. 2022. IMMUNOCERV, an ongoing Phase II trial combining PDS0101, an HPV-specific T cell immunotherapy, with chemotherapy and radiation for treatment of locally advanced cervical cancers. Presented at: Society for Immunotherapy of Cancer; November 8-12, 2022. Boston, MA. Abstract: 674.
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 VERSATILE-002
VERSATILE-002 is a single-arm Phase 2 trial evaluating the safety and efficacy of PDS0101, an HPV16-targeted investigational T cell-activating immunotherapy that leverages PDS Biotech's proprietary Versamune® technology, in combination with Merck's anti-PD-1 therapy, KEYTRUDA® (pembrolizumab). The combination is being evaluated in immune checkpoint inhibitor (ICI)-naïve and ICI-refractory patients with recurrent/metastatic HPV16-positive head and neck squamous cell carcinoma (HNSCC) and was granted Fast Track designation by the Food and Drug Administration in June 2022.
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