Abstract
Purpose
To explore the relationship between the spatial interaction of programmed death-ligand 1(PD-L1)-positive tumor cell and T cell with specific functions and the recurrence of non-small cell lung cancer (NSCLC) and optimize prognostic stratification.
Materials and methods
This study retrospectively included 104 patients with locally advanced NSCLC who underwent radical surgery. Tissue microarrays were constructed including tumor center (TC) and invasion margin (IM), and CK/CD4/CD8/PD-L1/programmed death-1 (PD-1) was labeled using multiplex immunofluorescence to decipher the counts and spatial distribution of tumor cells and T cells. The immune microenvironment and recurrence stratification were characterized using the Mann–Whitney U test and Cox proportional hazards model.
Result
Compared with the IM, the proportion of tumor cells (especially PD-L1+) was increased in the TC, while T cells (especially PD-1+) were decreased. An increase in TC PD-1+ CD8 T cells promoted relapse (HR = 2.183), while PD-L1+ tumor cells alone or in combination with T cells had no predictive value for relapse. In addition, in both TC and IM, CD8 were on average closer to PD-L1+ tumor cells than CD4, especially exhausted CD8. The effective density and percentage of PD-1+ CD4 T cells interacting with PD-L1+ tumor cells in the IM were both associated with recurrence, and the HRs increased sequentially (HRs were 2.809 and 4.063, respectively). Patients with low PD-1+CD4 count combined high PD-1+CD4 effective density showed significantly poorer RFS compared to those with high PD-1+CD4 count combined low PD-1+CD4 effective density, in both the TC and IM regions (HRs were 5.810 and 8.709, respectively).
Conclusion
Assessing the relative spatial proximity of PD-1/PD-L1 contributes to a deeper understanding of tumor immune escape and generates prognostic information in locally advanced NSCLC patients.
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Data Availability
The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.
Abbreviations
- DAPI:
-
4′,6-Diamidino-2-phenylindole
- EGFR:
-
Epidermal growth factor receptor
- FFPE:
-
Formalin-fixed, paraffin-embedded
- IM:
-
Invasion margin
- ICIs:
-
Immune checkpoint inhibitors
- mIF:
-
Multiplex immunofluorescence
- NSCLC:
-
Non-small cell lung cancer
- NND:
-
Nearest neighbor distances
- PD-L1:
-
Programmed death-ligand 1
- PD-1:
-
Programmed death-1
- RFS:
-
Relapse-free survival
- TME:
-
Tumor microenvironment
- TMA:
-
Tissue microarray
- TC:
-
Tumor center
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Funding
This work was supported by grants from the National Natural Science Foundation of China (Grant No. 82172866), the Shandong Provincial Natural Science Foundation (Grant No. ZR2021LZL005), the Shandong Provincial Natural Science Foundation (Grant No. ZR2019LZL019), and the Department of Science & Technology of Shandong Province (Grant No. 2021CXGC011102).
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LY, LX, and XS contributed to conception and design of the study. LY, WZ, JS, GY, SC, and FS organized the database. LY, WZ, JS, GY, and SC performed the statistical analysis. LY wrote the first draft of the manuscript. LX and XS wrote sections of the manuscript. All authors contributed to manuscript revision, read, and approved the submitted version.
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This study was approved by the Ethics Review Committee of Shandong Cancer Hospital and complied with the provisions of the Declaration of Helsinki. This study was a retrospective analysis, and informed consent was not required.
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Yang, L., Zhang, W., Sun, J. et al. The role of spatial interplay patterns between PD-L1-positive tumor cell and T cell in recurrence of locally advanced non-small cell lung cancer. Cancer Immunol Immunother 72, 2015–2027 (2023). https://doi.org/10.1007/s00262-023-03380-z
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DOI: https://doi.org/10.1007/s00262-023-03380-z