OSE Immunotherapeutics SA announced that the Japanese Patent Office has issued the notice of allowance for a new patent covering Tedopi, a combination of neoepitopes, for use after failure with PD-1 or PD-L1 immune checkpoint inhibitor treatment in HLA-A2 positive cancer patients. This patent, which will further strengthen Tedopis global intellectual property portfolio in immuno-oncology, will provide the product with a new protection until 2037. This new patent recognises the innovation of a multiepitope composition (all peptides included in Tedopi) administered after immune checkpoint inhibitor (progression of the cancer), in particular in secondary resistance situation.

In addition, it further supports the products clinical development focus and the positive results of the Atalante 1 Phase 3 trial of Tedopi in patients with advanced non-small cell lung cancer (NSCLC) with secondary resistance to PD-1/PD-L1 immune checkpoint inhibitor, a hard-to-treat patient population with high unmet medical need. Based on the finalized positive results of Atalante 1, company are preparing discussions with regulatory agencies on optimal paths for potential approval of Tedopi in patients with NSCLC in secondary resistanceafter immune checkpoint inhibitor treatment. The Atalante 1 clinical trial evaluated the benefit of Tedopi in an HLA-A2 positive patient population with NSCLC at invasive stage IIIB or metastatic stage IV, in 2nd or 3rd line treatment following checkpoint inhibitor failure.

The Tedopi treatment was compared to docetaxel or pemetrexed chemotherapy (CT) treatments in this patient population, with overall survival as the primary endpoint of the trial. Tedopi demonstrated a favourable benefit/risk ratio versus standard of care (SoC) docetaxel or pemetrexed in advanced HLA-A2 positive NSCLC patients with secondary resistance to PD-1 or PD-L1 immune checkpoint inhibitors.