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Published in: Virchows Archiv 6/2018

Open Access 01-06-2018 | Original Article

Immune cell expression of TGFβ1 in cancer with lymphoid stroma: dendritic cell and regulatory T cell contact

Authors: Haruo Ohtani, Toru Terashima, Eiichi Sato

Published in: Virchows Archiv | Issue 6/2018

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Abstract

Although cancer tissue generally shows limited immune responses, some cancers abound with lymphocytes, which generally show favorable prognosis. These cancers, despite their rarity, are important in analyzing immune responses in cancer tissue. Transforming growth factor β1 (TFGβ1) is a multifunctional cytokine, generally having an immunosuppressive function. The present study analyzes the in situ TGFβ1 expression in 23 cases of lymphocyte-rich gastric carcinomas (Ly-rich GCs) using immunohistochemistry and in situ hybridization. Immunohistochemistry revealed that latency-associated peptide (LAP) of TGFβ1 was localized in mainly immune cells in all cases, which was more abundant than in control GCs. Expression of LAP by cancer cells was only focal. In situ hybridization also confirmed abundant TGFβ1 mRNA expression in the lymphoid stroma. Double immunofluorescent microscopy identified LAP+ cells as macrophages, dendritic cells, and part of T cells. Close cell-to-cell contact was observed between LAP+ dendritic-shaped cells and FoxP3+ regulatory T cells (Treg cells). Mature dendritic cells in Ly-rich GCs expressed LAP more frequently than those in the secondary lymphoid organs. Our data revealed abundant expression of TGFβ1 in immune cells with contact to Treg cells in lymphoid stroma, which is consistent with the notion that TGFβ1 is one of the immunosuppressive factors in cancer stroma.
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Metadata
Title
Immune cell expression of TGFβ1 in cancer with lymphoid stroma: dendritic cell and regulatory T cell contact
Authors
Haruo Ohtani
Toru Terashima
Eiichi Sato
Publication date
01-06-2018
Publisher
Springer Berlin Heidelberg
Published in
Virchows Archiv / Issue 6/2018
Print ISSN: 0945-6317
Electronic ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-018-2336-y

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