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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

  • Original Article – Clinical Oncology
  • Published:
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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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Correspondence to Thierry Landre.

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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

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