1. Enhanced mitochondrial pyruvate transport elicits a robust ROS production to sensitize the antitumor efficacy of interferon-γ in colon cancer.
- Author
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Tai Y, Cao F, Li M, Li P, Xu T, Wang X, Yu Y, Gu B, Yu X, Cai X, Ao F, Ge P, Xiang L, Yang B, Jiang Y, and Li Y
- Subjects
- Animals, Antineoplastic Agents pharmacology, Apoptosis drug effects, Biological Transport, Cell Line, Tumor, Colonic Neoplasms genetics, Female, Gene Expression Regulation, Neoplastic drug effects, Mice, Mitochondria genetics, Models, Biological, Oxidation-Reduction, Proprotein Convertase 1 genetics, Proprotein Convertase 1 metabolism, Proprotein Convertase 2 genetics, Proprotein Convertase 2 metabolism, Colonic Neoplasms metabolism, Interferon-gamma pharmacology, Mitochondria drug effects, Mitochondria metabolism, Pyruvates metabolism, Reactive Oxygen Species metabolism
- Abstract
Metabolic reprogramming is a feature of cancer cells and crucial for tumor growth and metastasis. Interferon-γ (IFNγ) is a cytokine that plays a pivotal role in host antitumor immunity. However, little is known about the roles of metabolic reprogramming in immune responses. Here, we show that colon cancer cells reprogram metabolism to coordinate proper cellular responses to IFNγ by downregulating mitochondrial pyruvate carrier (MPC)1 and 2 via STAT3 signaling. Forced overexpression of MPC promote the production of reactive oxygen species and enhance the apoptosis induced by IFNγ in colon cancer cells. Moreover, inhibiting STAT3 sensitize the antitumor efficacy of IFN-γ against colon cancer cells. Our findings present a previously unrecognized mechanism that colon cancer manipulate to resist IFNγ mediated antitumor immunity that have implications for targeting a unique aspect of this disease., (Copyright © 2018 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2019
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