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Published in: Cancer Immunology, Immunotherapy 9/2018

01-09-2018 | Original Article

mTOR-mediated glycolysis contributes to the enhanced suppressive function of murine tumor-infiltrating monocytic myeloid-derived suppressor cells

Authors: Yuting Deng, Jiao Yang, Feifei Luo, Jing Qian, Ronghua Liu, Dan Zhang, Hongxiu Yu, Yiwei Chu

Published in: Cancer Immunology, Immunotherapy | Issue 9/2018

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Abstract

Immune cell activation occurs concurrently with metabolic reprogramming. As important components of the tumor microenvironment, monocytic myeloid-derived suppressor cells (M-MDSCs) are featured by their potent immunosuppressive abilities on anti-tumor effector cells. However, little is known about the contribution of metabolic adaptations to their suppressive roles. In this study, we found that tumor-infiltrating M-MDSCs had the same phenotype with splenic M-MDSCs. Compared with splenic M-MDSCs, tumor-infiltrating M-MDSCs exhibited stronger suppressive activities which was accompanied by higher glycolysis. Inhibition of glycolysis impaired the suppressive function of tumor M-MDSCs. Meanwhile, the results demonstrated that mTOR was responsible for this function regulation. mTOR inhibition by rapamycin decreased the glycolysis and reduced the suppressive activities of these cells. Furthermore, rapamycin treatment inhibited the tumor growth and reduced the percentage of M-MDSCs in 3LL tumor bearing mice. These results demonstrated that modulation of metabolism in immune cells can be an effective way to enhance anti-tumor effects.
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Metadata
Title
mTOR-mediated glycolysis contributes to the enhanced suppressive function of murine tumor-infiltrating monocytic myeloid-derived suppressor cells
Authors
Yuting Deng
Jiao Yang
Feifei Luo
Jing Qian
Ronghua Liu
Dan Zhang
Hongxiu Yu
Yiwei Chu
Publication date
01-09-2018
Publisher
Springer Berlin Heidelberg
Published in
Cancer Immunology, Immunotherapy / Issue 9/2018
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-018-2177-1

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