Prognostic significance of tumor-infiltrating CD8+ and FOXP3+ lymphocytes in residual tumors and alterations in these parameters after neoadjuvant chemotherapy in triple-negative breast cancer: a retrospective multicenter study

Breast Cancer Research : BCR
Minoru MiyashitaTakanori Ishida

Abstract

The status of tumor-infiltrating lymphocytes (TILs) has been recently proposed to predict clinical outcome of patients with breast cancer. We therefore studied the prognostic significance of CD8(+) TILs and FOXP3(+) TILs in residual tumors after neoadjuvant chemotherapy (NAC) and the alterations in these parameters before and after NAC in patients with triple-negative breast cancer (TNBC). One hundred thirty-one TNBC patients who received NAC at three institutions were examined. CD8(+) TIL and FOXP3(+) TIL in residual tumors and biopsy specimens were evaluated by double-staining immunohistochemistry. The CD8(+) TIL and FOXP3(+) TIL status of the residual tumors was assessed, and the rates of their changes before and after NAC were calculated. TNBC patients with high CD8(+) TIL levels or a high CD8/FOXP3 ratio in residual tumors had significantly better recurrence-free survival (RFS) and breast cancer-specific survival (BCSS) than patients with low values of these parameters. In multivariate analyses, CD8(+) TIL exhibited strong prognostic significance for RFS, with a hazard ratio (HR) of 3.09 (95 % confidence interval (CI) 1.537-6.614, P=0.0013). The CD8/FOXP3 ratio was also significantly correlated with RFS (HR=2.07, 95 % CI 1...Continue Reading

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Methods Mentioned

BETA
biopsy

Related Concepts

FOXP3 protein, human
Lymph Nodes
Retrospective Studies
Lymphocytes, Tumor-Infiltrating
CD8 Antigens
Residual Tumor
Suppressor T-Lymphocytes, CD8-Positive
Progression-Free Survival
Neoadjuvant Therapy
Forkhead Transcription Factors

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