Tolerability profile
Fewer serious adverse effects were reported with the vaccine than with chemotherapy (11.4% with Tedopi and 35.1% with docetaxel).
The vaccine also allowed patients to maintain a better quality of life. Scores from the Quality of Life Questionnaire Core 30, which explores several areas of daily life, were better with the vaccine. Change in patients’ overall well-being was delayed in the vaccine group: 3.3 months in the chemotherapy arm versus 9 months in the vaccine arm.
“The vaccine was well tolerated. It has benefits in terms of controlling disease symptoms and causes few side effects. Chemotherapy with docetaxel, meanwhile, is more toxic and may affect a patient’s overall well-being. It causes hair loss in practically 100% of patients, induces neuropathy, makes hands and feet swell, damages the nails, is associated with nausea and vomiting ...” noted Dr. Besse. He went on to say that after the trial, of the patients who stopped receiving the vaccine or chemotherapy (either for toxicity reasons or for disease progression), those who had been given the vaccine responded better to the subsequent chemotherapy “because their overall health was better.”
Clinical development
The clinical development of Tedopi is ongoing. Three trials are currently taking place. One study is comparing the Tedopi vaccine plus docetaxel with Tedopi plus nivolumab (immunotherapy not used as a first-line treatment) to determine whether the effects of these treatment combinations might might be enhanced for patients with previously treated lung cancer.
Another study relating to ovarian cancer is in the recruitment phase. The researchers seek to evaluate the vaccine alone or in combination with pembrolizumab for patients with platinum-sensitive ovarian cancer. Results from both trials are expected in 2025.
The third trial seeks to assess FOLFIRI as maintenance therapy or FOLFIRI as maintenance plus Tedopi for patients with pancreatic cancer to improve disease management. Efficacy data are expected next year.
OSE Immunotherapeutics is simultaneously working on a companion biomarker, the HLA-A2 test.
The study was funded by OSE Immunotherapeutics. Dr. Besse disclosed the following conflicts of interest (research funding, institution): AbbVie, Amgen, AstraZeneca, Chugai Pharmaceutical, Daiichi-Sankyo, Ellipse Pharma, EISAI, Genmab, Genzyme Corporation, Hedera Dx, Inivata, IPSEN, Janssen, MSD, Pharmamar, Roche-Genentech, Sanofi, Socar Research, Taiho Oncology, and Turning Point Therapeutics.
This article was translated from the Medscape French Edition and a version appeared on Medscape.com.