Combinatory ImmunoTherapy-1 (Com-IT-1) Irradiation and PD-1 Blockade in Locally Advanced / Advanced NSCLC

This phase II study will investigate NSCLC patients (stage III-IV, palliative treated) where treatment with a PD1-inhibitor is indicated according to national guidelines. Patients will be treated with a check-point inhibitor combined with radiotherapy (6 Gy x 3) towards lesions (1-2). Atezolizumab is available and reimbursed in the public health system. The radiotherapy dosing is significantly lower than standard stereotactic radiotherapy, and is in accordance with other studies reported in ClinicalTrials.gov. Such a fractionation will putatively induce immunogenic cell death, while being a safe treatment, not likely to induce significant side effects. Whereas the primary endpoint in our clinical study will be toxicity, the secondary endpoints include response rates, overall survival, safety and tolerability, quality of life, progression-free survival and duration of response. In addition, exploratory endpoints will include immunological response, tumor evolution and dynamics in the tumor microenvironment during treatment, imaging, and biomarkers of clinical response.