Riluzole exerts distinct antitumor effects from a metabotropic glutamate receptor 1-specific inhibitor on breast cancer cells

Dolfi, S. C. et al. (2017) Riluzole exerts distinct antitumor effects from a metabotropic glutamate receptor 1-specific inhibitor on breast cancer cells. Oncotarget, 8(27), pp. 44639-44653. (doi: 10.18632/oncotarget.17961) (PMID:28591718) (PMCID:PMC5546507)

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Abstract

Recent evidence suggests that glutamate signaling plays an important role in cancer. Riluzole is a glutamate release inhibitor and FDA-approved drug for the treatment of amyotrophic lateral sclerosis. It has been investigated as an inhibitor of cancer cell growth and tumorigenesis with the intention of repurposing it for the treatment of cancer. Riluzole is thought to act by indirectly inhibiting glutamate signaling. However, the specific effects of riluzole in breast cancer cells are not well understood. In this study, the anti-cancer effects of riluzole were explored in a panel of breast cancer cell lines in comparison to the metabotropic glutamate receptor 1-specific inhibitor BAY 36-7620. While both drugs inhibited breast cancer cell proliferation, there were distinct functional effects suggesting that riluzole action may be metabotropic glutamate receptor 1-independent. Riluzole induced mitotic arrest independent of oxidative stress while BAY 36-7620 had no measurable effect on mitosis. BAY 36-7620 had a more pronounced and significant effect on DNA damage than riluzole. Riluzole altered cellular metabolism as demonstrated by changes in oxidative phosphorylation and cellular metabolite levels. These results provide a better understanding of the functional action of riluzole in the treatment of breast cancer.

Item Type:Articles
Additional Information:This research was supported by the Flow Cytometry/Cell Sorting and RCINJ-Princeton Metabolomics Shared Resources of the Rutgers Cancer Institute of New Jersey (P30CA072720).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vazquez, Alexei
Authors: Dolfi, S. C., Medina, D. J., Kareddula, A., Paratala, B., Rose, A., Dhami, J., Chen, S., Ganesan, S., Mackay, G., Vazquez, A., and Hirshfield, K. M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Cancer Sciences
Journal Name:Oncotarget
Publisher:Impact Journals
ISSN:1949-2553
ISSN (Online):1949-2553
Copyright Holders:Copyright © 2017 Dolfi et al.
First Published:First published in Oncotarget 8(27):44639-44653
Publisher Policy:Reproduced under a Creative Commons license

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