VAXIMM AG announced topline data from the first clinical trial of its investigational oral cancer vaccine VXM01. The randomized, placebo-controlled, double-blind Phase I/II dose escalation study met all key endpoints and demonstrated safety and tolerability.
The study code-named VXM01-01-DE enrolled 45 patients with inoperable pancreatic cancer at the Heidelberg University Hospital (Heidelberg, Germany). In addition to standard-of-care treatment, the patients received several doses of VXM01, a therapeutic vaccine targeting the tumor vasculature, or placebo.
The results of the study indicate that the vaccine was safe and well tolerated. No dose-limiting toxicities were observed. Besides this primary endpoint, several important secondary endpoints, including specific T-cell response and changes in tumor perfusion, were met. After vaccination with VXM01, a quarter of the patients showed a strongly increased T-cell mediated immune response against the target (VEGFR-2). This effect was distinct from fluctuations observed in the placebo-treated patients. Immunologically responding patients occurred already in the lowest dose group. A third of the VXM01-treated patients had a strong drop in tumor perfusion following the treatment, accompanied by corresponding changes in tumor-specific and angiogenesis-related biomarkers. Tumor perfusion changes in the treatment group were correlated with the VEGFR-2 specific effector and regulatory T-cell responses. More detailed results from the trial will be submitted for presentation at upcoming scientific meetings and for publication in a peer-reviewed journal.
“We are delighted to see that VXM01 was safe and well tolerated in the patients we treated,” said PD Dr. Hubertus Schmitz-Winnenthal, principal investigator of the study. “We are especially excited about the encouraging data observed in the two key secondary endpoints. The vaccine seems to be able to induce and enhance the VEGFR-2 specific T-cell response and to impact tumor perfusion in a good proportion of treated patients.”
“We are very encouraged by these data,” added Dr. Heinz Lubenau, General Manager of VAXIMM GmbH, a fully owned subsidiary of VAXIMM AG in Germany. “It provides a strong basis for continuing the development of VXM01 for the treatment of solid tumor diseases. Following regulatory approval, we plan to re-open the study VXM01-01-DE for further recruitment of pancreatic cancer patients.”
Dr. Klaus Breiner, Executive Chairman of VAXIMM AG commented: “We are very pleased with this outcome. This first-in-man study was already designed as a placebo-controlled trial, providing us with a high level of confidence in the validity of the results.”