“…The immunosuppressive pattern in the stroma, the limited PD-L1 expression and the lack of antigen presentation suggest that SCLC has a weak immunogenic T-cell profile, which may have negative impacts on the immune response (Carvajal-Hausdorf 2019;He 2017;Parra 2016;Remon 2021;. According to preclinical evidence, chemotherapeutic agents and targeted therapies may synergize with immune checkpoint inhibitors by increasing the immunogenicity of cancer cells, suppressing immunosuppressive signaling pathways, and increasing the sensitivity of cancer cells to CD8 T-cell-dependent immunosurveillance and rejection (Galluzzi 2015;Spigel 2013).…”