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Title: G protein‐coupled estrogen receptor activates cell type‐specific signaling pathways in cortical cultures: relevance to the selective loss of astrocytes

Abstract

Abstract Selective activation of the G protein‐coupled estrogen receptor has been proposed to avoid some of the side effects elicited by the activation of classical estrogen receptors α and β. Although its contribution to neuroprotection triggered by estradiol in brain disorders has been explored, the results regarding ischemic stroke are contradictory, and currently, there is no consensus on the role that this receptor may play. The present study aimed to investigate the role of GPER in the ischemic insult. For that, primary cortical cultures exposed to oxygen and glucose deprivation ( OGD ) were used as a model. Our results demonstrate that neuronal survival was strongly affected by the ischemic insult and concurrent GPER activation with G1 had no further impact. In contrast, OGD had a smaller impact on astrocytes survival but G1, alone or combined with OGD , promoted their apoptosis. This effect was prevented by the GPER antagonist G15. The results also show that ischemia did not change the expression levels of GPER in neurons and astrocytes. In this study, we also demonstrate that selective activation of GPER induced astrocyte apoptosis via the phospholipase C pathway and subsequent intracellular calcium rise, whereas in neurons, this effect was notmore » observed. Taken together, this evidence supports a direct impact of GPER activity on the viability of astrocytes, which seems to be associated with the regulation of different signaling pathways in astrocytes and neurons. image« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. CICS‐UBI – Health Sciences Research Centre University of Beira Interior Covilhã Portugal
  2. CICS‐UBI – Health Sciences Research Centre University of Beira Interior Covilhã Portugal, Faculty of Health Sciences University of Beira Interior Covilhã Portugal
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1492482
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Journal of Neurochemistry
Additional Journal Information:
Journal Name: Journal of Neurochemistry Journal Volume: 149 Journal Issue: 1; Journal ID: ISSN 0022-3042
Publisher:
Wiley-Blackwell
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Roque, Cláudio, Mendes‐Oliveira, Julieta, and Baltazar, Graça. G protein‐coupled estrogen receptor activates cell type‐specific signaling pathways in cortical cultures: relevance to the selective loss of astrocytes. United Kingdom: N. p., 2019. Web. doi:10.1111/jnc.14648.
Roque, Cláudio, Mendes‐Oliveira, Julieta, & Baltazar, Graça. G protein‐coupled estrogen receptor activates cell type‐specific signaling pathways in cortical cultures: relevance to the selective loss of astrocytes. United Kingdom. https://doi.org/10.1111/jnc.14648
Roque, Cláudio, Mendes‐Oliveira, Julieta, and Baltazar, Graça. Mon . "G protein‐coupled estrogen receptor activates cell type‐specific signaling pathways in cortical cultures: relevance to the selective loss of astrocytes". United Kingdom. https://doi.org/10.1111/jnc.14648.
@article{osti_1492482,
title = {G protein‐coupled estrogen receptor activates cell type‐specific signaling pathways in cortical cultures: relevance to the selective loss of astrocytes},
author = {Roque, Cláudio and Mendes‐Oliveira, Julieta and Baltazar, Graça},
abstractNote = {Abstract Selective activation of the G protein‐coupled estrogen receptor has been proposed to avoid some of the side effects elicited by the activation of classical estrogen receptors α and β. Although its contribution to neuroprotection triggered by estradiol in brain disorders has been explored, the results regarding ischemic stroke are contradictory, and currently, there is no consensus on the role that this receptor may play. The present study aimed to investigate the role of GPER in the ischemic insult. For that, primary cortical cultures exposed to oxygen and glucose deprivation ( OGD ) were used as a model. Our results demonstrate that neuronal survival was strongly affected by the ischemic insult and concurrent GPER activation with G1 had no further impact. In contrast, OGD had a smaller impact on astrocytes survival but G1, alone or combined with OGD , promoted their apoptosis. This effect was prevented by the GPER antagonist G15. The results also show that ischemia did not change the expression levels of GPER in neurons and astrocytes. In this study, we also demonstrate that selective activation of GPER induced astrocyte apoptosis via the phospholipase C pathway and subsequent intracellular calcium rise, whereas in neurons, this effect was not observed. Taken together, this evidence supports a direct impact of GPER activity on the viability of astrocytes, which seems to be associated with the regulation of different signaling pathways in astrocytes and neurons. image},
doi = {10.1111/jnc.14648},
journal = {Journal of Neurochemistry},
number = 1,
volume = 149,
place = {United Kingdom},
year = {Mon Jan 28 00:00:00 EST 2019},
month = {Mon Jan 28 00:00:00 EST 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1111/jnc.14648

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Cited by: 17 works
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