• Jing Li and Jian Gu.
• College of Pharmacy, Southwest Minzu University, No.16 South 4th Section, 1st Ring Road, Chengdu, Sichuan 610041, PR China.
• Future Oncol. 2019 May 1; 15 (14): 1667-1678.

AbstractAim: To identify whether PD-L1 expression and EGFR status are associated with response to treatment benefit in advanced non-small-cell lung cancer (NSCLC) patients receiving PD-1/PD-L1 inhibitors. Methods: The relevant studies were retrieved and systematic evaluation was conducted. Databases were searched until November 2018. Results: A total of 12 randomized controlled trials (RCTs) with 6932 patients were included. Patients with the higher PD-L1 expression level tend to have a longer progression-free survival (PFS), overall survival (OS) and overall response rate (ORR). PFS and OS were significantly prolonged in all the subgroups of PD-L1 expression levels. For patients with PD-L1 expression levels of ≥1%, overall response rates were significantly prolonged, but there was no difference in patients with PD-L1 expression levels of <1% (hazard ratio [HR]: 1.75; 95% CI: 0.87-3.52; p = 0.12). EGFR wild-type NSCLC patients could benefit from PD-1/PD-L1 inhibitors in PFS (HR: 0.65; 95% CI: 0.45-0.91; p = 0.01) and OS (HR: 0.67; 95% CI: 0.62-0.73; p < 0.00001). Conclusion: This study indicates that PD-L1-positive or EGFR wild-type advanced NSCLC patients might get potential benefit from PD-1/PD-L1 inhibitors.

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