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Published in: Cancer Immunology, Immunotherapy 2/2014

01-02-2014 | Original Article

Critical role of spatial interaction between CD8+ and Foxp3+ cells in human gastric cancer: the distance matters

Authors: Anita Feichtenbeiner, Matthias Haas, Maike Büttner, Gerhard G. Grabenbauer, Rainer Fietkau, Luitpold V. Distel

Published in: Cancer Immunology, Immunotherapy | Issue 2/2014

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Abstract

Purpose

In various cancer types, an abundance of FoxP3+ regulatory T cells (Treg) has been associated with an unfavorable outcome. Yet, the role of Treg on cancer immunity has been shown to be complex. In single cell marker technique, other tumor-infiltrating lymphocytes (TILs) such as cytotoxic CD8+ T cells (CTL) also influenced prognosis. This study for the first time investigates the concurrent spatial distribution pattern of CD8+ and FoxP3+ TILs and their prognostic impact in human gastric cancer.

Materials and methods

Tumor tissue microarrays of 50 patients with surgically treated adenocarcinoma of the cardia were studied. An immunohistochemical double staining of CD8+ and FoxP3+ TILs was performed. Cell counts and cell-to-cell distances in tumor epithelium and stroma were evaluated with image-processing software. Metastasis-free survival, no-evidence-of-disease survival, and overall survival were investigated (mean follow-up time 6.9 years).

Results

High intraepithelial infiltration of CD8+ and FoxP3+ TIL was associated with the improved 10-year metastasis-free survival (83 vs. 54 %, p = 0.04 and 85 vs. 59 %, p = 0.09, respectively). Considering cell-to-cell distance and comparing patients with functional (30–110 μm) versus nonfunctional distances of CD8+ and FoxP3+ TILs, 10-year survival rates differed between 89 and 55 % (p = 0.009), respectively.

Conclusion

Prognostic influence of tumor-infiltrating immune cells in gastric cancer critically depends on their cell-to-cell distance. FoxP3+ TILs must be located within a distance between 30 and 110 μm of CD8+ T cells to positively impact on prognosis.
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Metadata
Title
Critical role of spatial interaction between CD8+ and Foxp3+ cells in human gastric cancer: the distance matters
Authors
Anita Feichtenbeiner
Matthias Haas
Maike Büttner
Gerhard G. Grabenbauer
Rainer Fietkau
Luitpold V. Distel
Publication date
01-02-2014
Publisher
Springer Berlin Heidelberg
Published in
Cancer Immunology, Immunotherapy / Issue 2/2014
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-013-1491-x

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