The Combination of Radiotherapy With Immunotherapy and Potential Predictive Biomarkers for Treatment of Non-Small Cell Lung Cancer Patients

• Published in: Frontiers in immunology Vol. 12; p. 723609
• Main Authors: Meng, Lu, Xu, Jianfang, Ye, Ying, Wang, Yingying, Luo, Shilan, Gong, Xiaomei
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Media S.A 21-09-2021
• Subjects: B7-H1 Antigen - immunology; biomarker; Carcinoma, Non-Small-Cell Lung - immunology; Carcinoma, Non-Small-Cell Lung - radiotherapy; Humans; immune checkpoint inhibitor (ICI); Immunology; immunotherapy; Lung Neoplasms - immunology; Lung Neoplasms - radiotherapy; non-small cell lung cancer (NSCLC); Programmed Cell Death 1 Receptor - immunology; Progression-Free Survival; Radioimmunotherapy; radiotherapy; Randomized Controlled Trials as Topic; Tumor Microenvironment; radiotherapy; biomarker; immune checkpoint inhibitor (ICI); non-small cell lung cancer (NSCLC); immunotherapy
• ISSN: 1664-3224; 1664-3224
• DOI: 10.3389/fimmu.2021.723609

Radiotherapy is an effective local treatment modality of NSCLC. Its capabilities of eliminating tumor cells by inducing double strand DNA (dsDNA) damage and modulating anti-tumor immune response in irradiated and nonirradiated sites have been elucidated. The novel ICIs therapy has brought hope to patients resistant to traditional treatment methods, including radiotherapy. The integration of radiotherapy with immunotherapy has shown improved efficacy to control tumor progression and prolong survival in NSCLC. In this context, biomarkers that help choose the most effective treatment modality for individuals and avoid unnecessary toxicities caused by ineffective treatment are urgently needed. This article summarized the effects of radiation in the tumor immune microenvironment and the mechanisms involved. Outcomes of multiple clinical trials investigating immuno-radiotherapy were also discussed here. Furthermore, we outlined the emerging biomarkers for the efficacy of PD-1/PD-L1 blockades and radiation therapy and discussed their predictive value in NSCLC.