Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells

Activation of nuclear factor (NF)-κB promotes cell proliferation and inhibits apoptosis. We have previously shown that oestrogens sensitise normal anterior pituitary cells to the apoptotic effect of tumour necrosis factor (TNF)-α by inhibiting NF-κB nuclear translocation. In the present study, we ex...

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Autores: Eijo Alvarenga, Stella Guadalupe, Gottardo, María Florencia, Jaita, Gabriela Alejandra, Magri, María Laura, Moreno Ayala, Mariela Alejandra, Zarate, Sandra Cristina, Candolfi, Marianela, Pisera, Daniel Alberto, Seilicovich, Adriana
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/15274
Acceso en línea:http://hdl.handle.net/11336/15274
Access Level:acceso abierto
Palabra clave:Apoptosis
Nf-Kb
Oestrogens
Pituitary
https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
id AR_98679be3bcd5ee67a4fa97201d4e8ac3
oai_identifier_str oai:ri.conicet.gov.ar:11336/15274
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
title Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
spellingShingle Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
Eijo Alvarenga, Stella Guadalupe
Apoptosis
Nf-Kb
Oestrogens
Pituitary
https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
title_short Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
title_full Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
title_fullStr Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
title_full_unstemmed Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
title_sort Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells
dc.creator.none.fl_str_mv Eijo Alvarenga, Stella Guadalupe
Gottardo, María Florencia
Jaita, Gabriela Alejandra
Magri, María Laura
Moreno Ayala, Mariela Alejandra
Zarate, Sandra Cristina
Candolfi, Marianela
Pisera, Daniel Alberto
Seilicovich, Adriana
author Eijo Alvarenga, Stella Guadalupe
author_facet Eijo Alvarenga, Stella Guadalupe
Gottardo, María Florencia
Jaita, Gabriela Alejandra
Magri, María Laura
Moreno Ayala, Mariela Alejandra
Zarate, Sandra Cristina
Candolfi, Marianela
Pisera, Daniel Alberto
Seilicovich, Adriana
author_role author
author2 Gottardo, María Florencia
Jaita, Gabriela Alejandra
Magri, María Laura
Moreno Ayala, Mariela Alejandra
Zarate, Sandra Cristina
Candolfi, Marianela
Pisera, Daniel Alberto
Seilicovich, Adriana
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Apoptosis
Nf-Kb
Oestrogens
Pituitary
https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
topic Apoptosis
Nf-Kb
Oestrogens
Pituitary
https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
description Activation of nuclear factor (NF)-κB promotes cell proliferation and inhibits apoptosis. We have previously shown that oestrogens sensitise normal anterior pituitary cells to the apoptotic effect of tumour necrosis factor (TNF)-α by inhibiting NF-κB nuclear translocation. In the present study, we examined whether oestrogens also modulate the NF-κB signalling pathway and apoptosis in GH3 cells, a rat somatolactotroph tumour cell line. As determined by Western blotting, 17β-oestradiol (E2) (10−9 m) increased the nuclear concentration of NF-κB/p105, p65 and p50 in GH3 cells. However, E2 did not modify the expression of Bcl-xL, a NF-κB target gene. TNF-α induced apoptosis of GH3 cells incubated in either the presence or absence of E2. Inhibition of the NF-kB pathway using BAY 11-7082 (BAY) (5 μm) decreased the viability of GH3 cells and increased the percentage of terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL)-positive GH3 cells. BAY also increased TNF-α-induced apoptosis of GH3 cells, an effect that was further increased by an inhibitor of the c-Jun N-terminal protein kinase pathway, SP600125 (10 μm). We also analysed the role of the NF-κB signalling pathway on proliferation and apoptosis of GH3 tumours in vivo. The administration of BAY to nude mice bearing GH3 tumours increased the number of TUNEL-positive cells and decreased the number of proliferating GH3 cells. These findings suggest that GH3 cells lose their oestrogenic inhibitory action on the NF-κB pathway and that the pro-apoptotic effect of TNF-α on these tumour pituitary cells does not require sensitisation by oestrogens as occurs in normal pituitary cells. NF-κB was required for the survival of GH3 cells, suggesting that pharmacological inhibition of the NF-κB pathway could interfere with pituitary tumour progression.
publishDate 2015
dc.date.none.fl_str_mv 2015-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/15274
Eijo Alvarenga, Stella Guadalupe; Gottardo, María Florencia; Jaita, Gabriela Alejandra; Magri, María Laura; Moreno Ayala, Mariela Alejandra; et al.; Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells; Wiley; Journal Of Neuroendocrinology; 27; 9; 9-2015; 692-701
0953-8194
1365-2826
url http://hdl.handle.net/11336/15274
identifier_str_mv Eijo Alvarenga, Stella Guadalupe; Gottardo, María Florencia; Jaita, Gabriela Alejandra; Magri, María Laura; Moreno Ayala, Mariela Alejandra; et al.; Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells; Wiley; Journal Of Neuroendocrinology; 27; 9; 9-2015; 692-701
0953-8194
1365-2826
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/jne.12296
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/jne.12296/abstract
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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spelling Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cellsEijo Alvarenga, Stella GuadalupeGottardo, María FlorenciaJaita, Gabriela AlejandraMagri, María LauraMoreno Ayala, Mariela AlejandraZarate, Sandra CristinaCandolfi, MarianelaPisera, Daniel AlbertoSeilicovich, AdrianaApoptosisNf-KbOestrogensPituitaryhttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3Activation of nuclear factor (NF)-κB promotes cell proliferation and inhibits apoptosis. We have previously shown that oestrogens sensitise normal anterior pituitary cells to the apoptotic effect of tumour necrosis factor (TNF)-α by inhibiting NF-κB nuclear translocation. In the present study, we examined whether oestrogens also modulate the NF-κB signalling pathway and apoptosis in GH3 cells, a rat somatolactotroph tumour cell line. As determined by Western blotting, 17β-oestradiol (E2) (10−9 m) increased the nuclear concentration of NF-κB/p105, p65 and p50 in GH3 cells. However, E2 did not modify the expression of Bcl-xL, a NF-κB target gene. TNF-α induced apoptosis of GH3 cells incubated in either the presence or absence of E2. Inhibition of the NF-kB pathway using BAY 11-7082 (BAY) (5 μm) decreased the viability of GH3 cells and increased the percentage of terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL)-positive GH3 cells. BAY also increased TNF-α-induced apoptosis of GH3 cells, an effect that was further increased by an inhibitor of the c-Jun N-terminal protein kinase pathway, SP600125 (10 μm). We also analysed the role of the NF-κB signalling pathway on proliferation and apoptosis of GH3 tumours in vivo. The administration of BAY to nude mice bearing GH3 tumours increased the number of TUNEL-positive cells and decreased the number of proliferating GH3 cells. These findings suggest that GH3 cells lose their oestrogenic inhibitory action on the NF-κB pathway and that the pro-apoptotic effect of TNF-α on these tumour pituitary cells does not require sensitisation by oestrogens as occurs in normal pituitary cells. NF-κB was required for the survival of GH3 cells, suggesting that pharmacological inhibition of the NF-κB pathway could interfere with pituitary tumour progression.Fil: Eijo Alvarenga, Stella Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Gottardo, María Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Jaita, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Magri, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Moreno Ayala, Mariela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Zarate, Sandra Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Candolfi, Marianela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Pisera, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaFil: Seilicovich, Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas; Argentina; Argentina. Universidad de Buenos Aires; ArgentinaWiley2015-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/15274Eijo Alvarenga, Stella Guadalupe; Gottardo, María Florencia; Jaita, Gabriela Alejandra; Magri, María Laura; Moreno Ayala, Mariela Alejandra; et al.; Lack of oestrogenic inhibition of the nuclear factor-κB pathway in somatolactotroph tumour cells; Wiley; Journal Of Neuroendocrinology; 27; 9; 9-2015; 692-7010953-81941365-2826enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/jne.12296info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/jne.12296/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:15:45Zoai:ri.conicet.gov.ar:11336/15274instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 14:15:45.792CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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