On March 27, 2024 PDS Biotechnology Corporation (Nasdaq: PDSB) (PDS Biotech or the Company), a late-stage immunotherapy company focused on transforming how the immune system targets and kills cancers and the development of infectious disease vaccines, reported an update to its clinical development strategy and reported its financial results for the year ended December 31, 2023 (Press release, PDS Biotechnology, MAR 27, 2024, View Source [SID1234641510]).

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"We have obtained compelling data from several Phase 2 trials in the fourth quarter of 2023, including long-term survival data from the National Cancer Institute (NCI)-led triple combination trial of PDS01ADC in combination with Versamune HPV (PDS0101) and an investigational immune checkpoint inhibitor (ICI), as well as our VERSATILE-002 study," said Frank Bedu-Addo, PhD, President and Chief Executive Officer of PDS Biotech. "We now have a better understanding of how our drug platform technology works in advanced cancer, and we have therefore made the strategic, data-driven decision to add our novel, investigational IL-12 fused antibody drug conjugate, PDS01ADC, to the promising combination of Versamune HPV and KEYTRUDA to advance the triple combination as our top clinical development priority."

"By initially addressing the rapidly growing unmet medical need in recurrent metastatic HPV+ head and neck squamous cell cancer (HNSCC), we strongly believe this approach may rapidly establish our proprietary combination of PDS01ADC and Versamune HPV as a transformative oncology treatment. The data suggest that the triple combination may result in a significant improvement in overall survival rates for patients who currently lack an effective treatment option. It may also significantly increase the rates of durable tumor shrinkage or overall responses," said Dr. Bedu-Addo. "We are grateful to the patients and physicians who participated in the clinical trials which have helped inform our understanding of how the drug therapies may be used most effectively to safely address advanced cancer, and our decision to prioritize the triple combination."

With the recent long-term survival Phase 2 data from the NCI-led triple combination trial, together with favorable safety and extended survival results seen in both ICI naïve and resistant patients in our VERSATILE-002 trial, PDS Biotech has decided to prioritize the triple combination in place of the VERSATILE-003 trial. This decision enables PDS Biotech to focus its resources on the drug regimen it believes has the highest potential to benefit patients with HNSCC and to drive shareholder value.

"We have had several discussions with key opinion leaders in HNSCC regarding the use of the triple combination in HNSCC. A clear unmet need is seen in HPV+ HNSCC with few agents being studied in this population due to the difficulty in treating advanced HNSCC," said Kirk V. Shepard, M.D., Chief Medical Officer of PDS Biotech. "These discussions with expert HNSCC oncologists have guided our decision to prioritize the triple combination in our efforts to address the growing incidence of advanced HPV+ HNSCC."

"Despite good outcomes in many patients with HPV-related HNSCC, approximately 20% of patients will develop recurrent, incurable disease, often in young individuals in the prime of their lives. HPV-related HNSCC that progresses after standard first-line chemotherapy is a devastating, hard-to-treat cancer with no HPV-related treatment currently approved. The NCI clinical trial data show significant promise in the use of PDS01ADC in combination with Versamune HPV," said Katharine A. Price, M.D., Associate Professor of Oncology, Head and Neck Disease Group, Mayo Clinic Comprehensive Cancer Center and Principal Investigator of PDS Biotech’s upcoming triple combination trial. "A controlled randomized clinical trial that builds upon the current data is warranted, and I am intrigued by the potential of this unique combination to treat HNSCC."

Clinical Strategy Update

Triple Combination Clinical Trial (PDS01ADC, Versamune HPV and KEYTRUDA)

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Company in discussions with the U.S. Food and Drug Administration (FDA) on the design of potentially pivotal clinical trial to treat HPV+ HNSCC, with the trial expected to start in 2024.

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Previously announced data from Phase 2 NCI-led triple combination clinical trial for the treatment of recurrent/metastatic ICI naïve and ICI resistant HPV16-positive cancers including head and neck, anal, cervical, vaginal and vulvar cancers support rationale:

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ICI naïve group: 75% of patients remain alive at 36 months. The median OS was not reached. Published results show a 36-month survival rate of approximately 20% with ICIs. ORR of 75% and complete response of 38% were seen in patients treated with the triple combination. Published ORR of <40% seen with immunotherapeutic agents.

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ICI resistant group: 12-month overall survival (OS) rate of 72%, and 63% overall response rate (ORR) in patients with optimal dose of PDS01ADC. Median OS approximately 20 months; published 12-month OS rate in HPV-positive ICI-resistant cancer is ~30%; published median OS in HPV-positive ICI-resistant cancer is 3.4 months.

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Responses were seen in all HPV-positive tumor types.

Leadership Appointments

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In January 2024, announced the appointment of Dr. Shepard as Chief Medical Officer.

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In November 2023, announced the appointment of Lars Boesgaard as Chief Financial Officer.

Full Year 2023 Financial Results

Net loss for the year ended December 31, 2023, was approximately $42.9 million, or $1.39 per basic and diluted share, compared to a net loss of $40.9 million, or $1.43 per basic share and diluted share, for the year ended December 31, 2022. The higher net loss was primarily the result of increased operating loss and increased net interest expense.

Research and development expenses for the year ended December 31, 2023, decreased to $27.8 million, compared to $29.4 million for the year ended December 31, 2022. The decrease of $1.7 million was primarily attributable to the $10 million purchase of the rights to PDS01ADC in 2022, partially offset by an increase in clinical costs of $6.1 million and an increase in personnel costs of $2.1 million.

General and administrative expenses for the year ended December 31, 2023, increased to $15.3 million compared to $12.2 million for the year ended December 31, 2022. The $3.1 million increase was primarily attributable to an increase in personnel costs of $1.5 million and an increase in professional fees of $1.6 million.

Total operating expenses for the year ended December 31, 2023, were $43.0 million, an increase of approximately 3.3% compared to $41.7 million total operating expenses for the year ended December 31, 2022.

Net interest expense increased to $1.3 million for the year ended December 31, 2023, compared to $0.4 million for the year ended December 31, 2022. The change was due to higher interest expense related to the Company’s notes payable, partially offset by higher interest income on bank deposits.

During the fourth quarter of 2023, the Company raised approximately $10.5 million in net proceeds from its "at-the-market" sales agreement.

The Company’s cash balance as of December 31, 2023, was $56.6 million.

Conference Call and Webcast
The conference call is scheduled to begin at 8:00 AM ET today, March 27, 2024. Participants should dial 877-704-4453 (United States) or 201-389-0920 (International) and reference conference ID 13745320. To access the webcast, please use the following link. The event will be archived on the Investor Relations section of PDS Biotech’s website for six months.