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Published in: Breast Cancer Research and Treatment 3/2018

01-10-2018 | Preclinical study

Protein N-glycosylation alteration and glycolysis inhibition both contribute to the antiproliferative action of 2-deoxyglucose in breast cancer cells

Authors: Audrey Berthe, Marie Zaffino, Claire Muller, François Foulquier, Marine Houdou, Céline Schulz, Frédéric Bost, Elia De Fay, Sabine Mazerbourg, Stéphane Flament

Published in: Breast Cancer Research and Treatment | Issue 3/2018

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Abstract

Purpose

Cancer cells often elicit a higher glycolytic rate than normal cells, supporting the development of glycolysis inhibitors as therapeutic agents. 2-Deoxyglucose (2-DG) is used in this context due to its ability to compete with glucose. However, many studies do not take into account that 2-DG inhibits not only glycolysis but also N-glycosylation. Since there are limited publications on 2-DG mechanism of action in breast cancer, we studied its effects in breast cancer cell lines to determine the part played by glycolysis inhibition and N-linked glycosylation interference.

Methods and Results

2-Deoxyglucose behaved as an anticancer agent with a similar efficiency on cell number decrease between the hormone-dependent MCF-7 and hormone-independent MDA-MB-231 breast cancer cells. It also interfered with the N-linked glycosylation process in both cell lines as illustrated by the migration profile of the lysosomal-associated membrane protein 2 and calumenin. These results are reinforced by the appearance of an abnormal Man7GlcNAc2 structure both on lipid-linked oligosaccharides and N-linked glycoproteins of 2-DG incubated MDA-MB-231 cells. Besides, 2-DG-induced a transient endoplasmic reticulum stress that was more sustained in MDA-MB-231 cells. Both changes were abrogated by mannose. 2-DG, even in the presence of mannose, decreased glycolysis in both cell lines. Mannose partially reversed the effects of 2-DG on cell numbers with N-linked glycosylation interference accounting for 37 and 47% of 2-DG anti-cancerous effects in MDA-MB-231 and MCF-7 cells, respectively.

Conclusion

N-linked glycosylation interference and glycolysis disruption both contribute to the anticancer properties of 2-DG in breast cancer cells.
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Metadata
Title
Protein N-glycosylation alteration and glycolysis inhibition both contribute to the antiproliferative action of 2-deoxyglucose in breast cancer cells
Authors
Audrey Berthe
Marie Zaffino
Claire Muller
François Foulquier
Marine Houdou
Céline Schulz
Frédéric Bost
Elia De Fay
Sabine Mazerbourg
Stéphane Flament
Publication date
01-10-2018
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 3/2018
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-018-4874-z

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