Transgene Provides an Update after the Interim Futility Analysis of the PHOCUS Study of Pexa-Vec in Liver Cancer

Regulatory News:

Transgene (Paris:TNG), a biotech company designing and developing virus-based immunotherapies for the treatment of solid tumors, provides an update on the interim futility analysis of the PHOCUS study of Pexa-Vec in liver cancer. The independent Data Monitoring Committee (IDMC) of the PHOCUS trial has recommended to stop the study (see press release distributed on August 2, 2019). Transgene is currently analyzing the data of the trial it received from its partner SillaJen, notably in the context of the ongoing Phase 2 clinical trial evaluating the combination regimen of Pexa-Vec and the immunotherapy nivolumab in the same indication. The recommendation to stop the PHOCUS trial is not caused by safety issues of Pexa-Vec.

Transgene is convinced of the great potential of oncolytic viruses (OV) as this therapeutic class displays numerous advantages that are acknowledged by the scientific and medical community. These include the ability of the viruses to infect and selectively replicate within the tumor, inducing cancer cell destruction, and to elicit a strong immune response against the tumor.

Transgene novel proprietary OV platform Invir.IO allows the arming of these viruses to trigger the expression of anticancer weapons directly in the tumor, thus increasing the efficacy of these molecules while reducing their possible side effects.

The oncolytic viruses derived from the Invir.IO platform have been designed using an optimized strain of Vaccinia Copenhagen. These carry a double deletion TK-RR-, which makes their replication more selective than viruses carrying a simple TK deletion such as Pexa-Vec. In addition, the Invir.IO platform is designed to incorporate several transgenes encoding for a range of specific anticancer weapons which involve well-established immunotherapy mechanisms such as anti-CTLA-4 antibodies.

The collaboration with AstraZeneca was formed on the merits of this platform. As described in the press release distributed on May 2, 2019, Transgene is currently working to design five new oncolytic viruses for AstraZeneca.

Philippe Archinard, PhD, Chairman and CEO of Transgene, commented: “We are obviously disappointed with the outcome of the PHOCUS study; however we remain convinced in the potential of our oncolytic virus pipeline. Our recent collaborative agreement with AstraZeneca highlights the industry interest in the multi-armed OVs that we can generate using our unique Invir.IO platform. We also expect to announce the first clinical data with TG6002 in patients with colorectal cancer later this year. In addition, we expect to announce important clinical results from our most advanced therapeutic vaccines; TG4010 in lung cancer and TG4001 in HPV-Positive head and neck cancer. With funding through to 2022, a clear strategy and novel technology platforms such as Invir.IO and myvac, Transgene is well placed to demonstrate the potential of its novel medicines designed to improve the treatment of solid tumors.”