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Journal of Immunology Research
Volume 2014, Article ID 593562, 10 pages
http://dx.doi.org/10.1155/2014/593562
Research Article

Tumor-Activated T Cells from Gastric Cancer Patients Induce the Antitumor Immune Response of T Cells via Their Antigen-Presenting Cell-Like Effects

1Department of Nuclear Medicine, The Affiliated Hospital of Jiangsu University, 438 Jiefang Road, Zhenjiang 212001, China
2Institute of Oncology, The Affiliated Hospital to Jiangsu University, 438 Jiefang Road, Zhenjiang 212001, China
3Department of Immunology and Laboratory Immunology, School of Medical Science and Laboratory Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China

Received 5 December 2013; Revised 28 January 2014; Accepted 25 February 2014; Published 31 March 2014

Academic Editor: Bin Zhang

Copyright © 2014 Chaoming Mao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Human γδ T cells display the principal characteristics of professional antigen-presenting cells (APCs), in addition to playing a vital role in immunity through cytokine secretion and their cytotoxic activity. However, it is not clear whether γδ T cells perform APC-like functions under pathological conditions. In this study, we showed that, in contrast to peripheral-derived γδ T cells directly isolated from PBMCs of gastric cancer patients, tumor-activated γδ T cells not only killed tumor cells efficiently but also strongly induced primary CD4+ and CD8+  αβ T cells proliferation and differentiation. More importantly, they abrogated the immunosuppression induced by CD4+CD25+ Treg cells and induced the cytotoxic function of CD8+  αβ T cells from patients with gastric cancer. In conclusion, tumor-activated γδ T cells can induce adaptive immune responses through their APC-like functions, and these cells may be a potentially useful tool in the development of tumor vaccines and immunotherapy.