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Background  For advanced nonsquamous non‐small cell lung cancer (NSCLC), the mechanisms of resistance to first‐line immunotherapy are not clear. Immune checkpoint inhibitors (ICIs) in combination with agents targeting other pathways may serve as second‐line therapy options. Apatinib (a vascular endothelial growth factor receptor 2 tyrosine kinase inhibitor) could increase the efficacy of camrelizumab (an ICI agent). The efficacy and safety of this combination regimen as a second‐line therapy for NSCLC patients after failure on first‐line immunotherapy has not previously been evaluated.    Methods  In this single‐arm, multicenter, phase II trial, metastatic nonsquamous NSCLC patients previously treated with single‐agent ICI or ICI plus chemotherapy will be enrolled. Participants will receive intravenous camrelizumab 200 mg D1 and oral apatinib 250 mg D1‐21 for a 21‐day cycle. The study treatment will continue until disease progression, unacceptable toxicity, or withdrawal of consent. The primary endpoint is progression‐free survival by investigator. Secondary endpoints are overall survival, objective response rate, disease control rate, duration of response by investigator, quality of life, safety, and toxicity.    Conclusions  This trial will provide evidence of the benefit of treatment with camrelizumab combined with apatinib in advanced nonsquamous NSCLC patients who were previously treated with first‐line immunotherapy.

thoracic cancer

Study protocol: A single‐arm, multicenter, phase  II  trial of camrelizumab plus apatinib for advanced nonsquamous  NSCLC  previously treated with first‐line immunotherapy