PDS Biotech Announces PDS0101 Combined with Chemoradiotherapy Associated with Rapid Decline in Circulating Tumor DNA (ctDNA/cfDNA) - Seite 2

Sixty-one patients with cervical cancer were included in the analysis either as part of a SOC treatment banking protocol (n=44) or as part of the IMMUNOCERV Phase 2 clinical trial combining PDS0101 with SOC (n=17). Longitudinal plasma samples were collected from each patient at baseline, during weeks 1, 3, and 5, and at 3-4 months after CRT.

In the study, HPV16 was detected in 59% of tumors and 70% of cfDNA. The median cfDNA at baseline was 28.15 copies/mL, with a range of 0 to 206,030 copies/mL.

The presentation at ASTRO 2023 highlighted the following data:

• Earlier and greater proportion of cfDNA clearance with PDS0101 plus chemoradiation (CRT) vs. SOC CRT alone (81.3% clearance after 3 weeks vs. 30.3% with SOC (p=0.0018), and 91.7% of clearance at 5 weeks vs. 53.1% with SOC (p=0.0179)
• Baseline cfDNA levels correlated with the International Federation of Gynecology and Obstetrics (FIGO) stage and lymph node involvement; 100% of patients treated with PDS0101 had cancer that had spread to the lymph nodes

“HPV16 cfDNA represents a novel biomarker with the potential to help oncologists make more informed treatment decisions for their patients with HPV16-positive cancers. This early data are encouraging, and we will continue to evaluate patients to determine any potential correlations between cfDNA clearance and clinical outcomes. Further analysis of cfDNA kinetics could provide valuable information on the relationship between cfDNA levels, treatment response, and ongoing clinical outcomes,” said study principal investigator Ann Klopp, MD, PhD, Professor of Radiation Oncology at MD Anderson. “I look forward to the continued evaluation of PDS0101 in combination with standard-of-care chemoradiotherapy.”

About Versamune
Versamune is a novel investigational T cell activating platform which effectively stimulates a precise immune system response to a cancer-specific protein. Versamune based investigational immunotherapies promote a potent targeted T cell attack against cancers expressing the protein. They are given by subcutaneous injection and can be combined with standard of care treatments. Clinical data suggest that Versamune based investigational immunotherapies, such as PDS0101, demonstrate meaningful disease control by reducing and shrinking tumors, delaying disease progression and/or prolonging survival. Versamune based immunotherapies have demonstrated minimal toxicity to date that may allow them to be safely combined with other treatments. We believe Versamune based investigational immunotherapies represent a transformative treatment approach for cancer patients to provide improved efficacy, safety and tolerability.