Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Cirúrgica Brasileira (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502016000400286 |
Resumo: | PURPOSE: To evaluate the effects of letrozole (Ltz) in carcinogen+estrogen-induced endometrial hyperplasia. METHODS: BALB/c female mice were divided into four groups of 12 animals each receiving an intrauterine dose of N-ethyl-N-nitrosourea (ENU) and weekly subcutaneous injections of estradiol hexaidrobenzoate (EHB), except for group I(control). The groups were divided in I (control), II (ENU+EHB), III (ENU+EHB+MPA) and IV (ENU+EHB+Ltz). Group III also received intramuscular injections of MPA (medroxy progesterone acetate) every four weeks, while group IV received oral doses of Ltz daily. At the end of 16 weeks, the animals were sacrificed, and blood samples were collected for the measurement of serum estradiol and progesterone levels. Uterine histological sections were made to evaluate the presence of endometrial proliferative lesions. Differences between groups were evaluated with student's t test, ANOVA and chi-square test. RESULTS: Groups ENU+EHB, ENU+EHB+MPA and ENU+EHB+Ltz showed varying degrees of endometrial hyperplasia. The incidence of hyperplasia in groups ENU+EHB and ENU+EHB+Ltz was higher and more severe than in group ENU+EHB+MPA. Control group showed lower levels of serum estradiol than the other groups. CONCLUSION: There was no evidence that letrozole could act as an antiestrogenic drug in the development of endometrial proliferative lesions. |
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Acta Cirúrgica Brasileira (Online) |
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Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in miceEndometrial HyperplasiaEstradiolProgesteroneMice PURPOSE: To evaluate the effects of letrozole (Ltz) in carcinogen+estrogen-induced endometrial hyperplasia. METHODS: BALB/c female mice were divided into four groups of 12 animals each receiving an intrauterine dose of N-ethyl-N-nitrosourea (ENU) and weekly subcutaneous injections of estradiol hexaidrobenzoate (EHB), except for group I(control). The groups were divided in I (control), II (ENU+EHB), III (ENU+EHB+MPA) and IV (ENU+EHB+Ltz). Group III also received intramuscular injections of MPA (medroxy progesterone acetate) every four weeks, while group IV received oral doses of Ltz daily. At the end of 16 weeks, the animals were sacrificed, and blood samples were collected for the measurement of serum estradiol and progesterone levels. Uterine histological sections were made to evaluate the presence of endometrial proliferative lesions. Differences between groups were evaluated with student's t test, ANOVA and chi-square test. RESULTS: Groups ENU+EHB, ENU+EHB+MPA and ENU+EHB+Ltz showed varying degrees of endometrial hyperplasia. The incidence of hyperplasia in groups ENU+EHB and ENU+EHB+Ltz was higher and more severe than in group ENU+EHB+MPA. Control group showed lower levels of serum estradiol than the other groups. CONCLUSION: There was no evidence that letrozole could act as an antiestrogenic drug in the development of endometrial proliferative lesions.Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia2016-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502016000400286Acta Cirúrgica Brasileira v.31 n.4 2016reponame:Acta Cirúrgica Brasileira (Online)instname:Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)instacron:SBDPC10.1590/S0102-865020160040000010info:eu-repo/semantics/openAccessLara,Alessandra CerávoloCândido,Eduardo BatistaVidigal,Paula VieiraRocha,Ana Luiza LunardiCarvalho-Macedo,Alessandra CostaCarneiro,Márcia MendonçaSilva-Filho,Agnaldo Lopeseng2016-05-06T00:00:00Zoai:scielo:S0102-86502016000400286Revistahttps://www.bvs-vet.org.br/vetindex/periodicos/acta-cirurgica-brasileira/https://old.scielo.br/oai/scielo-oai.php||sgolden@terra.com.br0102-86501678-2674opendoar:2016-05-06T00:00Acta Cirúrgica Brasileira (Online) - Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)false |
dc.title.none.fl_str_mv |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
title |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
spellingShingle |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice Lara,Alessandra Cerávolo Endometrial Hyperplasia Estradiol Progesterone Mice |
title_short |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
title_full |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
title_fullStr |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
title_full_unstemmed |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
title_sort |
Effect of letrozole in carcinogen-plus-estrogen-induced endometrial hyperplasia in mice |
author |
Lara,Alessandra Cerávolo |
author_facet |
Lara,Alessandra Cerávolo Cândido,Eduardo Batista Vidigal,Paula Vieira Rocha,Ana Luiza Lunardi Carvalho-Macedo,Alessandra Costa Carneiro,Márcia Mendonça Silva-Filho,Agnaldo Lopes |
author_role |
author |
author2 |
Cândido,Eduardo Batista Vidigal,Paula Vieira Rocha,Ana Luiza Lunardi Carvalho-Macedo,Alessandra Costa Carneiro,Márcia Mendonça Silva-Filho,Agnaldo Lopes |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Lara,Alessandra Cerávolo Cândido,Eduardo Batista Vidigal,Paula Vieira Rocha,Ana Luiza Lunardi Carvalho-Macedo,Alessandra Costa Carneiro,Márcia Mendonça Silva-Filho,Agnaldo Lopes |
dc.subject.por.fl_str_mv |
Endometrial Hyperplasia Estradiol Progesterone Mice |
topic |
Endometrial Hyperplasia Estradiol Progesterone Mice |
description |
PURPOSE: To evaluate the effects of letrozole (Ltz) in carcinogen+estrogen-induced endometrial hyperplasia. METHODS: BALB/c female mice were divided into four groups of 12 animals each receiving an intrauterine dose of N-ethyl-N-nitrosourea (ENU) and weekly subcutaneous injections of estradiol hexaidrobenzoate (EHB), except for group I(control). The groups were divided in I (control), II (ENU+EHB), III (ENU+EHB+MPA) and IV (ENU+EHB+Ltz). Group III also received intramuscular injections of MPA (medroxy progesterone acetate) every four weeks, while group IV received oral doses of Ltz daily. At the end of 16 weeks, the animals were sacrificed, and blood samples were collected for the measurement of serum estradiol and progesterone levels. Uterine histological sections were made to evaluate the presence of endometrial proliferative lesions. Differences between groups were evaluated with student's t test, ANOVA and chi-square test. RESULTS: Groups ENU+EHB, ENU+EHB+MPA and ENU+EHB+Ltz showed varying degrees of endometrial hyperplasia. The incidence of hyperplasia in groups ENU+EHB and ENU+EHB+Ltz was higher and more severe than in group ENU+EHB+MPA. Control group showed lower levels of serum estradiol than the other groups. CONCLUSION: There was no evidence that letrozole could act as an antiestrogenic drug in the development of endometrial proliferative lesions. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502016000400286 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502016000400286 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0102-865020160040000010 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia |
publisher.none.fl_str_mv |
Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia |
dc.source.none.fl_str_mv |
Acta Cirúrgica Brasileira v.31 n.4 2016 reponame:Acta Cirúrgica Brasileira (Online) instname:Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC) instacron:SBDPC |
instname_str |
Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC) |
instacron_str |
SBDPC |
institution |
SBDPC |
reponame_str |
Acta Cirúrgica Brasileira (Online) |
collection |
Acta Cirúrgica Brasileira (Online) |
repository.name.fl_str_mv |
Acta Cirúrgica Brasileira (Online) - Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC) |
repository.mail.fl_str_mv |
||sgolden@terra.com.br |
_version_ |
1752126443638226944 |