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Copyright ©The Author(s) 2015. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Biol Chem. Nov 26, 2015; 6(4): 281-289
Published online Nov 26, 2015. doi: 10.4331/wjbc.v6.i4.281
Targeting amino acid metabolism in cancer growth and anti-tumor immune response
Elitsa Ananieva
Elitsa Ananieva, Biochemistry and Nutrition, Des Moines University, Des Moines, IA 50312, United States
Author contributions: Ananieva E entirely contributed to this article.
Conflict-of-interest statement: There is no conflict of interest.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Elitsa Ananieva, PhD, Assistant Professor of Biochemistry, Biochemistry and Nutrition, Des Moines University, 3200 Grand Avenue, Des Moines, IA 50312, United States. elitsa.ananieva-stoyanova@dmu.edu
Telephone: +1-515-2711529 Fax: +1-515-2714215
Received: May 27, 2015
Peer-review started: May 29, 2015
First decision: June 18, 2015
Revised: July 7, 2015
Accepted: September 29, 2015
Article in press: September 30, 2015
Published online: November 26, 2015
Processing time: 179 Days and 23.8 Hours
Abstract

Recent advances in amino acid metabolism have revealed that targeting amino acid metabolic enzymes in cancer therapy is a promising strategy for the development of novel therapeutic agents. There are currently several drugs in clinical trials that specifically target amino acid metabolic pathways in tumor cells. In the context of the tumor microenvironment, however, tumor cells form metabolic relationships with immune cells, and they often compete for common nutrients. Many tumors evolved to escape immune surveillance by taking advantage of their metabolic flexibility and redirecting nutrients for their own advantage. This review outlines the most recent advances in targeting amino acid metabolic pathways in cancer therapy while giving consideration to the impact these pathways may have on the anti-tumor immune response.

Keywords: Amino acid metabolism; T cells; Anti-tumor immune response; Tumor microenvironment; Cancer therapy

Core tip: Amino acid metabolism has been a focus of increased attention by cancer researchers and immunologists due to its importance for the metabolic reprogramming of proliferating cells. Many amino acid enzymes are described as immunosuppressive in the tumor microenvironment and targeted for cancer therapy. This review addresses the metabolic control of tumor progression in the context of anti-tumor immunity and discusses current and future therapeutic approaches. Special emphasis is given to the emerging role of branched chain amino acid metabolism in cancer and immunity highlighting some recent work by our research group.