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PD-L1 Expression is not a Predictive Factor for Recurrence in Resected Non-small Cell Lung Cancer

  • Lung Cancer
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Abstract

Purpose

Although targeting programmed death-1 (PD-1) and its ligand, programmed death-ligand 1 (PD-L1), is an established treatment modality for non-small cell lung cancer (NSCLC), the prognostic relevance of PD-L1 expression in NSCLC patients who undergo pulmonary resection is controversial.

Methods

Two hundred thirty-seven NSCLC patients who underwent pulmonary resection were enrolled and the relationship between PD-L1 and various clinicopathological factors, as well as the prognostic relevance of PD-L1, was evaluated.

Results

PD-L1 expression was significantly higher in male patients (p < 0.01), lymphatic invasion (p < 0.01), vascular invasion (p < 0.01), grade 3–4 differentiation (p < 0.01), squamous cell carcinoma (p < 0.01), and pathological stage > II (p < 0.01), but significantly lower in those who were epithelial growth factor receptor (EGFR) mutation negative (p < 0.01). Relapse-free survival was significantly worse in patients with PD-L1 expression (p = 0.04). Univariate analysis showed that male sex (p = 0.04), carcinoembryonic antigen expression (CEA) (p < 0.01), maximum standardized uptake value (p < 0.01), lymphatic invasion (p < 0.01), vascular invasion (p < 0.01), grade 3–4 differentiation (p < 0.01), lower lobe disease (p = 0.04), PD-L1 expression (p = 0.03), and pathological stage (p < 0.01) were significant risk factors of recurrence. In multivariate analysis, CEA expression (p = 0.01), lymphatic invasion (p = 0.04), and pathological stage (p < 0.01) were risk factors for recurrence, whereas PD-L1 expression was not a significant factor of recurrence (p = 0.62).

Conclusion

PD-L1 expression was not a risk factor of recurrence but tumor progression tended to increase PD-L1 expression.

Trial Registration

The Institutional Review Board of Kanazawa Medical University approved the protocol of this retrospective study (approval number: I392), and written informed consent was obtained from all patients.

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Data Availability

The datasets generated and/or analyzed during the current study are not publicly available due to (our institutional restrictions, e.g., them containing information that could compromise research participant privacy/consent), but are available from the corresponding author on reasonable request.

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Acknowledgements

We thank H. Nikki March, PhD, from Edanz (https://jp.edanz.com/ac) for editing a draft of this manuscript.

Funding

This study has not been funded.

Author information

Authors and Affiliations

Authors

Contributions

NM performed the research, collected and analyzed the data, and wrote the paper. TM, MI, SI, and YI contributed to sample collection. HU contributed to supervision of this study and revision of the manuscript. All authors have read and approved the manuscript and ensure that this is the case.

Corresponding author

Correspondence to Nozomu Motono.

Ethics declarations

Competing interests

The authors declare that they have no competing interests.

Ethical Approval

The present study was conducted in accordance with the amended Declaration of Helsinki. The Institutional Review Boards of Kanazawa Medical University approved the protocol (approval number: I392).

Informed Consent

Written informed consent was obtained from all of the patients.

Consent to Publish

Not applicable.

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Motono, N., Mizoguchi, T., Ishikawa, M. et al. PD-L1 Expression is not a Predictive Factor for Recurrence in Resected Non-small Cell Lung Cancer. Lung 201, 95–101 (2023). https://doi.org/10.1007/s00408-022-00593-4

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  • DOI: https://doi.org/10.1007/s00408-022-00593-4

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