Abstract
Introduction
Patients treated with immune checkpoint inhibitors (ICIs) may not response to treatment and are at risk for immune-related adverse events (irAEs). Platelet function has been linked to both oncogenesis and immune evasion. We studied the association between the change in mean platelet volume (MPV), platelet count, survival, and the risk of developing irAEs in patients with metastatic non-small cell lung cancer (NSCLC) who have received first-line ICI.
Methods
In this retrospective study, delta (∆) MPV was defined as the difference between cycle 2 and baseline MPV. Patient data were collected via chart review, and Cox proportional hazard and Kaplan–Meier method were used to assess the risk and estimate median overall survival.
Results
We identified 188 patients treated with first-line pembrolizumab, with or without concurrent chemotherapy. There were 80 (42.6%) patients received pembrolizumab monotherapy, and 108 (57.4%) received pembrolizumab in combination with platinum-based chemotherapy. Patients whose MPV (∆MPV ≤ 0) decreased had hazard ratio (HR) = 0.64 (95% CI 0.43–0.94) for death with p = 0.023. Patients with ∆MPV ≤ − 0.2 fL (median), there was a 58% increase in the risk of developing irAE (HR = 1.58, 95% CI 1.04–2.40, p = 0.031). Thrombocytosis at baseline and cycle 2 was associated with shorter OS with p = 0.014 and 0.039, respectively.
Conclusion
Change in MPV after 1 cycle of pembrolizumab-based treatment was significantly associated with overall survival as well as the occurrence of irAEs in patients with metastatic NSCLC in the first-line setting. In addition, thrombocytosis was associated with poor survival.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author upon reasonable request.
Abbreviations
- ∆MPV:
-
Delta mean platelet volume
- ECOG:
-
Eastern Cooperative Oncology Group performance status
- HR:
-
Hazard ratio
- IQR:
-
Interquartile range
- irAEs:
-
Immune-related adverse events
- MPV:
-
Mean platelet volume
- NSCLC:
-
Non-small cell lung cancer
- PD-L1:
-
Programmed death-ligand 1
- OS:
-
Overall survival
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Acknowledgements
The authors would like to thank the Biostatistics Shared Resource at The Ohio State University Comprehensive Cancer Center, Columbus, OH for statistical support. Dr. Owen is supported by the LUNGevity Foundation Career Development Award.
Funding
This study was supported by the National Institutes of Health (P30CA016058). Research support provided by the REDCap project and The Ohio State University Center for Clinical and Translational Science grant support (National Center for Advancing Translational Sciences, Grant UL1TR002733).
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ML and DO contributed to the study conception and design. Material preparation, data collection, and analysis were performed by all authors. The first draft of the manuscript was written by all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This study was reviewed and approved by the institutional review board (IRB 2018C0177) at the Ohio State University.
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This was a retrospective study and a waiver for consent from each individual patient was approved by the institutional review board.
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Li, M., Zhao, S., Lopez, G. et al. Mean platelet volume, thrombocytosis, and survival in non-small cell lung cancer patients treated with first-line pembrolizumab alone or with chemotherapy. Cancer Immunol Immunother 72, 2067–2074 (2023). https://doi.org/10.1007/s00262-023-03392-9
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DOI: https://doi.org/10.1007/s00262-023-03392-9