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Erschienen in: Journal of Cancer Research and Clinical Oncology 4/2014

01.04.2014 | Original Article – Cancer Research

GPER functions as a tumor suppressor in MCF-7 and SK-BR-3 breast cancer cells

verfasst von: Christine Weißenborn, Tanja Ignatov, Angela Poehlmann, Anja K. Wege, Serban D. Costa, Ana Claudia Zenclussen, Atanas Ignatov

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 4/2014

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Abstract

Purpose

The orphan, membrane-bound estrogen receptor (GPER) is expressed at high levels in a large fraction of breast cancer patients, and its expression is favorable for patients’ survival. We investigated the role of GPER as a potential tumor suppressor in MCF-7 and SK-BR-3 breast cancer cells.

Methods

The effect of GPER agonist G-1 in cell culture was used to determine whether GPER inhibit cell growth. The methylation status of GPER promoter was investigated by methylation-specific PCR.

Results

GPER-specific agonist G-1 inhibited breast cancer cell proliferation in concentration-dependent manner via induction of the cell cycle arrest in M-phase, enhanced phosphorylation of histone 3 and cell apoptosis. Analysis of the methylation status of the GPER promoter in MCF-7 and SK-BR-3 cells revealed that GPER expression is regulated by epigenetic mechanisms and GPER expression is inactivated by promoter methylation. Overall, our results are consistent with our recent findings in triple-negative breast cancer cells, and the cell surface expression of GPER makes it an excellent potential therapeutic target for non-triple-negative breast cancer.
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Metadaten
Titel
GPER functions as a tumor suppressor in MCF-7 and SK-BR-3 breast cancer cells
verfasst von
Christine Weißenborn
Tanja Ignatov
Angela Poehlmann
Anja K. Wege
Serban D. Costa
Ana Claudia Zenclussen
Atanas Ignatov
Publikationsdatum
01.04.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 4/2014
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-014-1598-2

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