Background: Tumour-infiltrating lymphocytes (TILs) represent a robust biological prognostic biomarker in triple-negative breast cancer (TNBC); however, the contribution of different subsets of immune cells is unclear. We investigated the prognostic value of immune markers, including stromal TILs (sTILs), CD8T and FOPX3T cells, PD-1 and PD-L1 in non-metastatic TNBC.
Methods: In total, 259 patients with Stage I-III TNBC were reviewed. The density of sTILs along with the presence of total (t), stromal (s), and intratumoral (i) CD8T cells and FOPX3T cells were evaluated by haematoxylin and eosin and immunohistochemical staining. Immunohistochemical staining of PD-1, PD-L1 was also conducted.
Results: All immune markers were positively correlated with each other (P < 0.05). In the multivariate analysis, sTILs (P = 0.046), tCD8T cells (P = 0.024), iCD8T cells (P = 0.050) and PD-1 (P = 0.039) were identified as independent prognostic factors for disease-free survival (DFS). Further analysis showed that tCD8T cells (P = 0.026), iCD8T cells (P = 0.017) and PD-1 (P = 0.037) increased the prognostic value for DFS beyond that of the classic clinicopathological factors and sTILs.
Conclusions: In addition to sTILs, inclusion of tCD8T, iCD8T cells, or PD-1 may further refine the prognostic model for non-metastatic TNBC beyond that including classical factors alone.
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| http://dx.doi.org/10.1038/s41416-023-02218-w | DOI Listing |
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