Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Jornal Brasileiro de Pneumologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132015000200167 |
Resumo: | Objective: To investigate the effect of intermittent hypoxia-a model of obstructive sleep apnea (OSA)-on pancreatic expression of uncoupling protein-2 (UCP2), as well as on glycemic and lipid profiles, in C57BL mice. Methods: For 8 h/day over a 35-day period, male C57BL mice were exposed to intermittent hypoxia (hypoxia group) or to a sham procedure (normoxia group). The intermittent hypoxia condition involved exposing mice to an atmosphere of 92% N and 8% CO2 for 30 s, progressively reducing the fraction of inspired oxygen to 8 ± 1%, after which they were exposed to room air for 30 s and the cycle was repeated (480 cycles over the 8-h experimental period). Pancreases were dissected to isolate the islets. Real-time PCR was performed with TaqMan assays. Results: Expression of UCP2 mRNA in pancreatic islets was 20% higher in the normoxia group than in the hypoxia group (p = 0.11). Fasting serum insulin was higher in the hypoxia group than in the normoxia group (p = 0.01). The homeostasis model assessment of insulin resistance indicated that, in comparison with the control mice, the mice exposed to intermittent hypoxia showed 15% lower insulin resistance (p = 0.09) and 21% higher pancreatic β-cell function (p = 0.01). Immunohistochemical staining of the islets showed no significant differences between the two groups in terms of the area or intensity of α- and β-cell staining for insulin and glucagon. Conclusions: To our knowledge, this is the first report of the effect of intermittent hypoxia on UCP2 expression. Our findings suggest that UCP2 regulates insulin production in OSA. Further study of the role that UCP2 plays in the glycemic control of OSA patients is warranted. |
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Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxiaBlood glucoseSleep apnea syndromesPancreasGlucagon-secreting cells Objective: To investigate the effect of intermittent hypoxia-a model of obstructive sleep apnea (OSA)-on pancreatic expression of uncoupling protein-2 (UCP2), as well as on glycemic and lipid profiles, in C57BL mice. Methods: For 8 h/day over a 35-day period, male C57BL mice were exposed to intermittent hypoxia (hypoxia group) or to a sham procedure (normoxia group). The intermittent hypoxia condition involved exposing mice to an atmosphere of 92% N and 8% CO2 for 30 s, progressively reducing the fraction of inspired oxygen to 8 ± 1%, after which they were exposed to room air for 30 s and the cycle was repeated (480 cycles over the 8-h experimental period). Pancreases were dissected to isolate the islets. Real-time PCR was performed with TaqMan assays. Results: Expression of UCP2 mRNA in pancreatic islets was 20% higher in the normoxia group than in the hypoxia group (p = 0.11). Fasting serum insulin was higher in the hypoxia group than in the normoxia group (p = 0.01). The homeostasis model assessment of insulin resistance indicated that, in comparison with the control mice, the mice exposed to intermittent hypoxia showed 15% lower insulin resistance (p = 0.09) and 21% higher pancreatic β-cell function (p = 0.01). Immunohistochemical staining of the islets showed no significant differences between the two groups in terms of the area or intensity of α- and β-cell staining for insulin and glucagon. Conclusions: To our knowledge, this is the first report of the effect of intermittent hypoxia on UCP2 expression. Our findings suggest that UCP2 regulates insulin production in OSA. Further study of the role that UCP2 plays in the glycemic control of OSA patients is warranted. Sociedade Brasileira de Pneumologia e Tisiologia2015-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132015000200167Jornal Brasileiro de Pneumologia v.41 n.2 2015reponame:Jornal Brasileiro de Pneumologia (Online)instname:Sociedade Brasileira de Pneumologia e Tisiologia (SBPT)instacron:SBPT10.1590/S1806-37132015000004414info:eu-repo/semantics/openAccessVieira,Luciana RodriguesMartinez,DenisForgiarini,Luiz FelipeRosa,Darlan Pase daMuñoz,Gustavo Alfredo Ochs deFagundes,MicheliMartins,Emerson FerreiraMontanari,Carolina CaruccioFiori,Cintia Zappeeng2015-08-04T00:00:00Zoai:scielo:S1806-37132015000200167Revistahttp://www.jornaldepneumologia.com.br/default.aspONGhttps://old.scielo.br/oai/scielo-oai.php||jbp@jbp.org.br|| jpneumo@jornaldepneumologia.com.br1806-37561806-3713opendoar:2015-08-04T00:00Jornal Brasileiro de Pneumologia (Online) - Sociedade Brasileira de Pneumologia e Tisiologia (SBPT)false |
dc.title.none.fl_str_mv |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
title |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
spellingShingle |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia Vieira,Luciana Rodrigues Blood glucose Sleep apnea syndromes Pancreas Glucagon-secreting cells |
title_short |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
title_full |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
title_fullStr |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
title_full_unstemmed |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
title_sort |
Uncoupling protein-2 mRNA expression in mice subjected to intermittent hypoxia |
author |
Vieira,Luciana Rodrigues |
author_facet |
Vieira,Luciana Rodrigues Martinez,Denis Forgiarini,Luiz Felipe Rosa,Darlan Pase da Muñoz,Gustavo Alfredo Ochs de Fagundes,Micheli Martins,Emerson Ferreira Montanari,Carolina Caruccio Fiori,Cintia Zappe |
author_role |
author |
author2 |
Martinez,Denis Forgiarini,Luiz Felipe Rosa,Darlan Pase da Muñoz,Gustavo Alfredo Ochs de Fagundes,Micheli Martins,Emerson Ferreira Montanari,Carolina Caruccio Fiori,Cintia Zappe |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Vieira,Luciana Rodrigues Martinez,Denis Forgiarini,Luiz Felipe Rosa,Darlan Pase da Muñoz,Gustavo Alfredo Ochs de Fagundes,Micheli Martins,Emerson Ferreira Montanari,Carolina Caruccio Fiori,Cintia Zappe |
dc.subject.por.fl_str_mv |
Blood glucose Sleep apnea syndromes Pancreas Glucagon-secreting cells |
topic |
Blood glucose Sleep apnea syndromes Pancreas Glucagon-secreting cells |
description |
Objective: To investigate the effect of intermittent hypoxia-a model of obstructive sleep apnea (OSA)-on pancreatic expression of uncoupling protein-2 (UCP2), as well as on glycemic and lipid profiles, in C57BL mice. Methods: For 8 h/day over a 35-day period, male C57BL mice were exposed to intermittent hypoxia (hypoxia group) or to a sham procedure (normoxia group). The intermittent hypoxia condition involved exposing mice to an atmosphere of 92% N and 8% CO2 for 30 s, progressively reducing the fraction of inspired oxygen to 8 ± 1%, after which they were exposed to room air for 30 s and the cycle was repeated (480 cycles over the 8-h experimental period). Pancreases were dissected to isolate the islets. Real-time PCR was performed with TaqMan assays. Results: Expression of UCP2 mRNA in pancreatic islets was 20% higher in the normoxia group than in the hypoxia group (p = 0.11). Fasting serum insulin was higher in the hypoxia group than in the normoxia group (p = 0.01). The homeostasis model assessment of insulin resistance indicated that, in comparison with the control mice, the mice exposed to intermittent hypoxia showed 15% lower insulin resistance (p = 0.09) and 21% higher pancreatic β-cell function (p = 0.01). Immunohistochemical staining of the islets showed no significant differences between the two groups in terms of the area or intensity of α- and β-cell staining for insulin and glucagon. Conclusions: To our knowledge, this is the first report of the effect of intermittent hypoxia on UCP2 expression. Our findings suggest that UCP2 regulates insulin production in OSA. Further study of the role that UCP2 plays in the glycemic control of OSA patients is warranted. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-04-01 |
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=S1806-37132015000200167 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-37132015000200167 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1806-37132015000004414 |
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 de Pneumologia e Tisiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Pneumologia e Tisiologia |
dc.source.none.fl_str_mv |
Jornal Brasileiro de Pneumologia v.41 n.2 2015 reponame:Jornal Brasileiro de Pneumologia (Online) instname:Sociedade Brasileira de Pneumologia e Tisiologia (SBPT) instacron:SBPT |
instname_str |
Sociedade Brasileira de Pneumologia e Tisiologia (SBPT) |
instacron_str |
SBPT |
institution |
SBPT |
reponame_str |
Jornal Brasileiro de Pneumologia (Online) |
collection |
Jornal Brasileiro de Pneumologia (Online) |
repository.name.fl_str_mv |
Jornal Brasileiro de Pneumologia (Online) - Sociedade Brasileira de Pneumologia e Tisiologia (SBPT) |
repository.mail.fl_str_mv |
||jbp@jbp.org.br|| jpneumo@jornaldepneumologia.com.br |
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1750318346372382720 |