Abstract
Aims
Single-agent anti-PD-1/PD-L1 clinical efficacy against < 1% PD-L1-expressing non-small-cell lung cancers (NSCLCs) is controversial.
Methods
This meta-analysis examined randomized-trial data comparing first-line PD-1/PD-L1-inhibitor + chemotherapy (CT) vs CT alone for advanced < 1% PD-L1 NSCLCs. Outcome measures included overall survival (OS), progression-free survival (PFS) and objective response rate (ORR).
Results
IMpower (atezolizumab + CT), Keynote (pembrolizumab + CT) and CheckMate (nivolumab + CT) trials included 2037 NSCLCs (1246 PD-L1–negative; 791 < 1% PD-L1 expression). Anti-PD-1/PD-L1 + CT was significantly associated (hazard ratio [95% confidence interval]) with prolonged OS (0.75 [0.63–0.89]; p = 0.0008) and PFS (0.72 [0.65–0.80]; p < 0.0001), and higher ORR (odds ratio 2.06 [1.50–2.83]; p < 0.0001).
Conclusions
First-line anti-PD-1/PD-L1 + CT combination appears superior to CT alone for advanced, < 1% PD-L1-expressing NSCLCs for OS, PFS and ORR.
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Abbreviations
- ALK:
-
Anaplastic lymphoma kinase
- ChT:
-
Chemotherapy
- CI:
-
Confidence interval
- DOR:
-
Duration of response
- EGFR:
-
Epidermal growth factor receptor
- HR:
-
Hazard ratio
- ICI:
-
Immune-checkpoint inhibitor
- NSCLC:
-
Non-small-cell lung cancer
- Nsq:
-
Non-squamous cell
- OR:
-
Odds ratio
- ORR:
-
Objective response rate
- OS:
-
Overall survival
- PD-1:
-
Programmed cell-death protein-1
- PD-L1:
-
Programmed cell-death protein-1 ligand
- PFS:
-
Progression-free survival
- Sq:
-
Squamous cell
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Landre, T., Des Guetz, G., Chouahnia, K. et al. First-line PD-1/PD-L1 inhibitor plus chemotherapy vs chemotherapy alone for negative or < 1% PD-L1-expressing metastatic non-small-cell lung cancers. J Cancer Res Clin Oncol 146, 441–448 (2020). https://doi.org/10.1007/s00432-019-03070-3
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DOI: https://doi.org/10.1007/s00432-019-03070-3