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Published in: Journal of Hematology & Oncology 1/2016

Open Access 01-12-2016 | Research

Interleukin-15 enhances the proliferation, stimulatory phenotype, and antitumor effector functions of human gamma delta T cells

Authors: Heleen H. Van Acker, Sébastien Anguille, Yannick Willemen, Johan M. Van den Bergh, Zwi N. Berneman, Eva Lion, Evelien L. Smits, Viggo F. Van Tendeloo

Published in: Journal of Hematology & Oncology | Issue 1/2016

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Abstract

Background

Adoptive immunotherapy is gaining momentum to fight malignancies, whereby γδ T cells have received recent attention as an alternative cell source as to natural killer cells and αβ T cells. The advent of γδ T cells is largely due to their ability to recognize and target tumor cells using both innate characteristic and T cell receptor (TCR)-mediated mechanisms, their capacity to enhance the generation of antigen-specific T cell responses, and their potential to be used in an autologous or allogeneic setting.

Methods

In this study, we explored the beneficial effect of the immunostimulatory cytokine interleukin (IL)-15 on purified γδ T cells and its use as a stimulatory signal in the ex vivo expansion of γδ T cells for adoptive transfer. The expansion protocol was validated both with immune cells of healthy individuals and acute myeloid leukemia patients.

Results

We report that the addition of IL-15 to γδ T cell cultures results in a more activated phenotype, a higher proliferative capacity, a more pronounced T helper 1 polarization, and an increased cytotoxic capacity of γδ T cells. Moreover γδ T cell expansion starting with peripheral blood mononuclear cells from healthy individuals and acute myeloid leukemia patients is boosted in the presence of IL-15, whereby the antitumor properties of the γδ T cells are strengthened as well.

Conclusions

Our results support the rationale to explore the use of IL-15 in clinical adoptive therapy protocols exploiting γδ T cells.
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Metadata
Title
Interleukin-15 enhances the proliferation, stimulatory phenotype, and antitumor effector functions of human gamma delta T cells
Authors
Heleen H. Van Acker
Sébastien Anguille
Yannick Willemen
Johan M. Van den Bergh
Zwi N. Berneman
Eva Lion
Evelien L. Smits
Viggo F. Van Tendeloo
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Journal of Hematology & Oncology / Issue 1/2016
Electronic ISSN: 1756-8722
DOI
https://doi.org/10.1186/s13045-016-0329-3

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