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Clinicopathological Correlates of ?? T Cell Infiltration in Triple-Negative Breast Cancer.


ABSTRACT: The prognostic impact of the different tumor-infiltrating lymphocyte (TIL) subpopulations in solid cancers is still debated. Here, we investigated the clinicopathological correlates and prognostic impact of TILs, particularly of ?? T cells, in 162 patients with triple-negative breast cancer (TNBC). A high ?? T cell density (>6.625 ?? T cells/mm2) was associated with younger age (p = 0.008), higher tumor histological grade (p = 0.002), adjuvant chemotherapy (p = 0.010), BRCA1 promoter methylation (p = 0.010), TIL density (p < 0.001), and PD-L1 (p < 0.001) and PD-1 expression (p = 0.040). In multivariate analyses, ?? T cell infiltration (cutoff = 6.625 ?? T cells/mm2) was an independent prognostic factor (5-year relapse-free survival: 63.3% vs. 89.8%, p = 0.027; 5-year overall survival: 73.8% vs. 89.9%, p = 0.031, for low vs. high infiltration). This prognostic impact varied according to the tumor PIK3CA mutational status. High ?? T cell infiltration was associated with better survival in patients with PIK3CA wild-type tumors, but the difference was not significant in the subgroup with PIK3CA-mutated tumors. Altogether, these data suggest that high ?? T cell infiltrate is correlated with immune infiltration and might represent a candidate prognostic tool in patients with TNBC.

SUBMITTER: Boissiere-Michot F 

PROVIDER: S-EPMC7918092 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Clinicopathological Correlates of γδ T Cell Infiltration in Triple-Negative Breast Cancer.

Boissière-Michot Florence F   Chabab Ghita G   Mollevi Caroline C   Guiu Séverine S   Lopez-Crapez Evelyne E   Ramos Jeanne J   Bonnefoy Nathalie N   Lafont Virginie V   Jacot William W  

Cancers 20210212 4


The prognostic impact of the different tumor-infiltrating lymphocyte (TIL) subpopulations in solid cancers is still debated. Here, we investigated the clinicopathological correlates and prognostic impact of TILs, particularly of γδ T cells, in 162 patients with triple-negative breast cancer (TNBC). A high γδ T cell density (>6.625 γδ T cells/mm<sup>2</sup>) was associated with younger age (<i>p</i> = 0.008), higher tumor histological grade (<i>p</i> = 0.002), adjuvant chemotherapy (<i>p</i> = 0.  ...[more]

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