Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats

Autores
Candolfi, Marianela; Zaldivar, Verónica; de Laurentiis, Andrea; Jaita, Gabriela Alejandra; Pisera, Daniel Alberto; Seilicovich, Adriana
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
TNF-α is involved in the regulation of normal tissue homeostasis affecting cell proliferation, differentiation, and death. We previously reported that TNF-α reduces anterior pituitary cell proliferation and PRL release in an estrogen-dependent manner. In the present project we studied the induction of apoptosis by TNF-α in anterior pituitary cells from female rats. TNF-α (50 ng/ml) decreased the viability of anterior pituitary cells. Incubation with TNF-α for 24 h increased the percentage of terminal deoxynucleotidyltransferase-mediated deoxyuridine triphosphate nick end labeling-positive cells. TNF-α increased the percentage of somatotropes and lactotropes with apoptotic nuclear morphology without affecting the proportion of apoptotic corticotropes or gonadotropes. TNF-α increased the percentage of apoptotic lactotropes in cultured cells from rats killed in proestrus and estrus, but not in diestrus. This effect was significantly higher in cells from rats in proestrus than in estrus. In anterior pituitary cells from ovariectomized rats, TNF-α significantly increased the percentage of apoptotic lactotropes only when the cells were incubated in the presence of 17β-estradiol. These results indicate that TNF-α induces apoptosis in somatotropes and lactotropes from female rats. The apoptotic effect of TNF-α on lactotropes is dependent on estrogens and could be involved in the regulation of anterior pituitary cell renewal during the estrous cycle.
Fil: Candolfi, Marianela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Fil: Zaldivar, Verónica. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: de Laurentiis, Andrea. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Jaita, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Fil: Pisera, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Fil: Seilicovich, Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Materia
TNF
LACTOTROPES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/170659
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/170659
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female ratsCandolfi, MarianelaZaldivar, Verónicade Laurentiis, AndreaJaita, Gabriela AlejandraPisera, Daniel AlbertoSeilicovich, AdrianaTNFLACTOTROPEShttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3TNF-α is involved in the regulation of normal tissue homeostasis affecting cell proliferation, differentiation, and death. We previously reported that TNF-α reduces anterior pituitary cell proliferation and PRL release in an estrogen-dependent manner. In the present project we studied the induction of apoptosis by TNF-α in anterior pituitary cells from female rats. TNF-α (50 ng/ml) decreased the viability of anterior pituitary cells. Incubation with TNF-α for 24 h increased the percentage of terminal deoxynucleotidyltransferase-mediated deoxyuridine triphosphate nick end labeling-positive cells. TNF-α increased the percentage of somatotropes and lactotropes with apoptotic nuclear morphology without affecting the proportion of apoptotic corticotropes or gonadotropes. TNF-α increased the percentage of apoptotic lactotropes in cultured cells from rats killed in proestrus and estrus, but not in diestrus. This effect was significantly higher in cells from rats in proestrus than in estrus. In anterior pituitary cells from ovariectomized rats, TNF-α significantly increased the percentage of apoptotic lactotropes only when the cells were incubated in the presence of 17β-estradiol. These results indicate that TNF-α induces apoptosis in somatotropes and lactotropes from female rats. The apoptotic effect of TNF-α on lactotropes is dependent on estrogens and could be involved in the regulation of anterior pituitary cell renewal during the estrous cycle.Fil: Candolfi, Marianela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; ArgentinaFil: Zaldivar, Verónica. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: de Laurentiis, Andrea. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Jaita, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; ArgentinaFil: Pisera, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; ArgentinaFil: Seilicovich, Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; ArgentinaEndocrine Society2002-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/170659Candolfi, Marianela; Zaldivar, Verónica; de Laurentiis, Andrea; Jaita, Gabriela Alejandra; Pisera, Daniel Alberto; et al.; Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats; Endocrine Society; Endocrinology; 143; 9; 9-2002; 3611-36170013-7227CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/endo/article-lookup/doi/10.1210/en.2002-220377info:eu-repo/semantics/altIdentifier/doi/10.1210/en.2002-220377info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:29:07Zoai:ri.conicet.gov.ar:11336/170659instacron: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:34982025-10-22 11:29:07.312CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
title Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
spellingShingle Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
Candolfi, Marianela
TNF
LACTOTROPES
title_short Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
title_full Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
title_fullStr Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
title_full_unstemmed Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
title_sort Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats
dc.creator.none.fl_str_mv Candolfi, Marianela
Zaldivar, Verónica
de Laurentiis, Andrea
Jaita, Gabriela Alejandra
Pisera, Daniel Alberto
Seilicovich, Adriana
author Candolfi, Marianela
author_facet Candolfi, Marianela
Zaldivar, Verónica
de Laurentiis, Andrea
Jaita, Gabriela Alejandra
Pisera, Daniel Alberto
Seilicovich, Adriana
author_role author
author2 Zaldivar, Verónica
de Laurentiis, Andrea
Jaita, Gabriela Alejandra
Pisera, Daniel Alberto
Seilicovich, Adriana
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv TNF
LACTOTROPES
topic TNF
LACTOTROPES
purl_subject.fl_str_mv https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
dc.description.none.fl_txt_mv TNF-α is involved in the regulation of normal tissue homeostasis affecting cell proliferation, differentiation, and death. We previously reported that TNF-α reduces anterior pituitary cell proliferation and PRL release in an estrogen-dependent manner. In the present project we studied the induction of apoptosis by TNF-α in anterior pituitary cells from female rats. TNF-α (50 ng/ml) decreased the viability of anterior pituitary cells. Incubation with TNF-α for 24 h increased the percentage of terminal deoxynucleotidyltransferase-mediated deoxyuridine triphosphate nick end labeling-positive cells. TNF-α increased the percentage of somatotropes and lactotropes with apoptotic nuclear morphology without affecting the proportion of apoptotic corticotropes or gonadotropes. TNF-α increased the percentage of apoptotic lactotropes in cultured cells from rats killed in proestrus and estrus, but not in diestrus. This effect was significantly higher in cells from rats in proestrus than in estrus. In anterior pituitary cells from ovariectomized rats, TNF-α significantly increased the percentage of apoptotic lactotropes only when the cells were incubated in the presence of 17β-estradiol. These results indicate that TNF-α induces apoptosis in somatotropes and lactotropes from female rats. The apoptotic effect of TNF-α on lactotropes is dependent on estrogens and could be involved in the regulation of anterior pituitary cell renewal during the estrous cycle.
Fil: Candolfi, Marianela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Fil: Zaldivar, Verónica. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: de Laurentiis, Andrea. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Jaita, Gabriela Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Fil: Pisera, Daniel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
Fil: Seilicovich, Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentina
description TNF-α is involved in the regulation of normal tissue homeostasis affecting cell proliferation, differentiation, and death. We previously reported that TNF-α reduces anterior pituitary cell proliferation and PRL release in an estrogen-dependent manner. In the present project we studied the induction of apoptosis by TNF-α in anterior pituitary cells from female rats. TNF-α (50 ng/ml) decreased the viability of anterior pituitary cells. Incubation with TNF-α for 24 h increased the percentage of terminal deoxynucleotidyltransferase-mediated deoxyuridine triphosphate nick end labeling-positive cells. TNF-α increased the percentage of somatotropes and lactotropes with apoptotic nuclear morphology without affecting the proportion of apoptotic corticotropes or gonadotropes. TNF-α increased the percentage of apoptotic lactotropes in cultured cells from rats killed in proestrus and estrus, but not in diestrus. This effect was significantly higher in cells from rats in proestrus than in estrus. In anterior pituitary cells from ovariectomized rats, TNF-α significantly increased the percentage of apoptotic lactotropes only when the cells were incubated in the presence of 17β-estradiol. These results indicate that TNF-α induces apoptosis in somatotropes and lactotropes from female rats. The apoptotic effect of TNF-α on lactotropes is dependent on estrogens and could be involved in the regulation of anterior pituitary cell renewal during the estrous cycle.
publishDate 2002
dc.date.none.fl_str_mv 2002-09
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/11336/170659
Candolfi, Marianela; Zaldivar, Verónica; de Laurentiis, Andrea; Jaita, Gabriela Alejandra; Pisera, Daniel Alberto; et al.; Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats; Endocrine Society; Endocrinology; 143; 9; 9-2002; 3611-3617
0013-7227
CONICET Digital
CONICET
url http://hdl.handle.net/11336/170659
identifier_str_mv Candolfi, Marianela; Zaldivar, Verónica; de Laurentiis, Andrea; Jaita, Gabriela Alejandra; Pisera, Daniel Alberto; et al.; Tumor Necrosis Factor-alpha induces apoptosis of lactotropes from female rats; Endocrine Society; Endocrinology; 143; 9; 9-2002; 3611-3617
0013-7227
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/endo/article-lookup/doi/10.1210/en.2002-220377
info:eu-repo/semantics/altIdentifier/doi/10.1210/en.2002-220377
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
dc.publisher.none.fl_str_mv Endocrine Society
publisher.none.fl_str_mv Endocrine Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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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score 12.982451

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