Abstract
The programmed death-1 (PD-1) molecule is mainly expressed on functionally “exhausted” CD8+ T cells, dampening the host antitumor immune response. We evaluated the ratio between effective and regulatory T cells (Tregs) and PD-1 expression as a prognostic factor for operable breast cancer patients. A series of 218 newly diagnosed invasive breast cancer patients who had undergone primary surgery at Ruijin Hospital were identified. The influence of CD8+ cytotoxic T lymphocytes, FOXP3+ (Treg cell marker), and PD-1+ immune cell counts on prognosis was analyzed utilizing immunohistochemistry. Both PD-1+ immune cells and FOXP3+ Tregs counts were significantly associated with unfavorable prognostic factors. In bivariate, but not multivariate analysis, high tumor infiltrating PD-1+ cell counts correlated with significantly shorter patient survival. Our results suggest a prognostic value of the PD-1+ immune cell population in such breast cancer patients. Targeting the PD-1 pathway may be a feasible approach to treating patients with breast cancer.
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Abbreviations
- PD-1:
-
Programmed death-1
- Treg:
-
Regulatory T cell
- CTL:
-
Cytotoxic T lymphocyte
- NSCLC:
-
Non-small cell lung cancer
- OS:
-
Overall survival
- DFS:
-
Disease-free survival
- BCSS:
-
Breast cancer-specific survival
- TIL:
-
Tumor-infiltrating lymphocyte
- PD-L1:
-
Programmed death-ligand 1
- IHC:
-
Immunohistochemical
- FFPE:
-
Formalin-fixed paraffin-embedded
- H&E:
-
Hematoxylin and eosin
- HPF:
-
High-powered field
- SD:
-
Standard deviation
- IDC:
-
Invasive ductal carcinoma
- ILC:
-
Invasive lobular carcinoma
- SE:
-
Standard error
- ER:
-
Estrogen receptor
- PR:
-
Progesterone receptor
- HER2:
-
Human epidermal growth factor receptor-2
- TNBC:
-
Triple-negative breast cancer
- CAF:
-
Cancer-associated fibroblast
- SOCS1:
-
Suppressor of cytokine signaling 1
- RCC:
-
Renal cell carcinoma
- HR:
-
Hazard ratio
- CI:
-
Confidence interval
- MDSC:
-
Myeloid-derived suppressor cell
- TAM:
-
Tumor-associated macrophage
- ORR:
-
Overall response rate
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Acknowledgments
Research supported by grants from the National Natural Science Foundation of China (Grant Nos. 81202087; 81172520; 81202088), Leading Academic Discipline Project of Shanghai Municipal Education Commission (Grant No. J50208), and Foundation of Shanghai Science and Technology Commission (Grant No. 12140901503).
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The authors declare that they have no conflict of interest.
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Shenyou Sun and Xiaochun Fei have contributed equally to this work.
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Sun, S., Fei, X., Mao, Y. et al. PD-1+ immune cell infiltration inversely correlates with survival of operable breast cancer patients. Cancer Immunol Immunother 63, 395–406 (2014). https://doi.org/10.1007/s00262-014-1519-x
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DOI: https://doi.org/10.1007/s00262-014-1519-x