CD169 identifies an activated CD8(+) T cell subset in regional lymph nodes that predicts favorable prognosis in colorectal cancer patients.
Oncoimmunology
; 5(7): e1177690, 2016 Jul.
Article
em En
| MEDLINE
| ID: mdl-27622027
ABSTRACT
PURPOSE:
CD169 was first identified on macrophages (MÏ) and linked to antigen presentation. Here, we showed CD169 expression on some CD8(+) T lymphocytes in regional lymph nodes (LNs) and investigated the function and clinical relevance of CD169(+)CD8(+) T cells in tumor-draining LNs of colorectal cancer (CRC) patients. EXPERIMENTALDESIGN:
Fresh tumor-draining LN tissues from 39 randomly enrolled patients were assessed by flow cytometry for activation and differentiation of CD169(+)CD8(+) T cells and T cell-mediated killing of tumor cells. In total, 114 tumor-draining LN paraffin sections from CRC patients were analyzed by multiple-color immunofluorescence for CD169(+)CD8(+) T cell distribution and clinical values. The prognostic significance of CD169(+)CD8(+) T cells was evaluated by Kaplan-Meier analysis.RESULTS:
A fraction of CD8(+) T cells in regional LNs, but not peripheral blood, tonsils, or tumors, expressed surface CD169. In situ detection of draining LNs revealed preferential localization of CD169(+)CD8(+) T cells to subcapsular sinus and interfollicular regions, closely associated with CD169(+) MÏ. CD169(+)CD8(+) T cell ratios were significantly lower in peri-tumor LNs than distant-tumor LNs. CD169(+)CD8(+) T cells predominantly expressed activation markers (CD69, HLA-DR, PD-1) with slightly lower CD45RA and CD62L levels. They produced high granzyme B, perforin, TNF-α, and IFNγ levels, and promoted tumor-killing efficiency ex vitro. Moreover, CD169(+)CD8(+) T cells infiltrating tumor-draining LNs decreased with disease progression and were strongly associated with CRC patient survival.CONCLUSIONS:
We identified novel activated/cytolytic CD169(+)CD8(+) T cells selectively present in regional LNs, potentially serving as a powerful prognostic factor and indicator for selecting patients for immunotherapy.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Oncoimmunology
Ano de publicação:
2016
Tipo de documento:
Article