Abstract:e21141 Background: First-line pembrolizumab monotherapy is a standard treatment for metastatic non-small-cell lung cancer (NSCLC) with high PD-L1 expression (TPS ≥50%). However, many patients do not respond, and reliable biomarkers are lacking. Methods: Blood samples of 33 patients with metastatic NSCLC were analyzed at baseline (BL) and after four cycles of pembrolizumab monotherapy (FU). The expression of 12 genes involved in tumor-specific immune responses ( FAS, RORgt, FOXP3, IFNγ, FASLv1, PRF1, GATA3, PD… Show more
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