Nantes, France – September 11, 2023, 6:00pm CET – OSE Immunotherapeutics SA (ISIN: FR0012127173; Mnemo: OSE) today announced the peer-reviewed publication in Annals of Oncology* of the randomized Phase 3 clinical trial (Atalante-1) on T-cell epitope cancer vaccine Tedopi® in HLA-A2 positive patients with advanced or metastatic NSCLC in monotherapy in third line NSCLC with secondary resistance to immune checkpoint inhibitors (ICI).
Tedopi® is a novel T-cell epitope-based cancer vaccine targeting five tumor-associated antigens, an activating and differentiated off-the-shelf immunotherapy expanding tumor specific T-lymphocytes in HLA-A2 cancer patients. The article, titled “Randomized Open-Label Controlled Study of Cancer Vaccine OSE2101 Versus Chemotherapy in HLA-A2-positive Patients with Advanced Non-Small Cell Lung Cancer with Resistance to Immunotherapy: ATALANTE-1” , features positive data from the randomized international Phase 3 study showing that novel cancer vaccine Tedopi® improves overall survival with a better safety and quality of life profile in monotherapy compared to chemotherapy in HLA-A2 positive patients with advanced or metastatic NSCLC who have progressed at least 12 weeks after sequential treatment with chemotherapy and immune checkpoint inhibitors (ICI).
Prof. Benjamin Besse, Director of Clinical Research at Gustave Roussy Institute (IGR, Villejuif, France), and Principal Investigator of the Atalante-1 clinical trial, commented: “Tedopi® is the first cancer vaccine to demonstrate positive results on survival in a randomized Phase 3 trial in advanced and metastatic NSCLC cancer patients in 3 rd line. A significant reduction of the risk of death by 41% was achieved with a better safety profile and a maintained quality of life. This study, conducted in patients with secondary resistance to immunotherapy, compared Tedopi® monotherapy with standard of care docetaxel or pemetrexed chemotherapies. Further evaluation is clearly warranted in a second line of treatment of advanced and metastatic NSCLC, to potentially make this cancer vaccine available to hard-to-treat patients in failure and with high medical needs.”
Nicolas Poirier, Chief Executive Officer of OSE Immunotherapeutics, commented : “ Tedopi® is the most advanced therapeutic cancer vaccine in clinical development. These Phase 3 data, demonstrating the promising effects, have now been validated in the internationally recognized journal ‘Annals of Oncology', a major achievement for all involved so, in particular, we’d like to thank warmly the investigators, the patients and their families for their commitment. This Phase 3 positive monotherapy data and moreover the recently announced positive Phase 1 and 2 results using other personalized cancer vaccines in combination to treat resected melanoma or pancreatic cancer patients, highlight the promise of this new therapeutic class of vaccines. The clinical value of our results, re-activating specifically the anti-tumor immune responses, is particularly interesting in patients showing immune escape from checkpoint inhibitors. The confirmatory pivotal Phase 3 trial in preparation is planned to support the regulatory registration of Tedopi® in secondary resistance to immune checkpoint inhibitors, this time in second line NSCLC treatment.”
Main results of the first Phase 3 clinical trial of Tedopi® in HLA-A2+ patients with NSCLC
This Phase 3 clinical trial has demonstrated a significant therapeutic benefit in patients with secondary resistance (1) to immune checkpoint inhibitors (ICI) defined as patients with failure to platinum-based chemotherapy followed by a minimum of 12 weeks ICI treatment (main analysis of the trial). Tedopi® demonstrated a favorable benefit/risk ratio versus standard of care (SoC) docetaxel or pemetrexed in advanced HLA-A2+ NSCLC patients with secondary resistance to ICI.
The main results were:
Improved efficacy
Improved safety profile and Quality of Life
(1) S econdary resistance is defined as failure after a minimum of 12 weeks of Immune checkpoint inhibitor given in sequential chemotherapy - checkpoint inhibitors treatment (Kluger HM et al; Journal for immunoTherapy of Cancer 2020 Defining tumor resistance to PD-1 pathway blockade: recommendations from the first meeting of the SITC Immunotherapy Resistance Taskforce)
(2) The ECOG score is a performance scale used to quantify the general health condition of a patient. It is subdivided into 5 grades from 0 to 5, ranging from fully active (0) to fully disabled, then to death (5).
* Annals of Oncology , Impact Factor 2023: 50.5, the journal of the European Society for Medical Oncology and the Japanese Society of Medical Oncology, provides rapid and efficient peer-review publications on innovative cancer treatments or translational work related to oncology and precision medicine.
ABOUT OSE Immunotherapeutics
OSE Immunotherapeutics is a biotech company dedicated to developing first-in-class assets in immuno-oncology and immuno-inflammation.
The Company’s current well-balanced first-in-class clinical pipeline includes:
OSE Immunotherapeutics expects to generate further significant value from its two proprietary drug discovery platforms, which are central to its ambitious goal to deliver next-generation first-in-class immunotherapies:
Additional information about OSE Immunotherapeutics assets is available on the Company’s website: www.ose-immuno.com
Annals of Oncology
Randomized controlled/clinical trial
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Randomized Open-Label Controlled Study of Cancer Vaccine OSE2101 Versus Chemotherapy in HLA-A2-positive Patients with Advanced Non-Small Cell Lung Cancer with Resistance to Immunotherapy: ATALANTE-1
11-Sep-2023